Information reproducing apparatus and information recording medium for use in the information reproducing apparatus

[0002] The present invention relates to an information reproducing apparatus for reading and reproducing information from an information recording medium, such as a DVD, and to an information recording medium for use in the information reproducing apparatus.

[0003] Recently, a DVD system has attracted attention as the key of the multimedia period. The DVD (Digital Versatile Disc) system, which is capable of recording/reproducing high quality image, audio and computer data on the broadcast level, is a multimedia recording/reproducing system expected to widely be applied to a multiplicity of fields including movies, music, games, computers and the like.

[0004] The DVD system, which is capable of reproducing the atmosphere of a movie theater because of the high quality image on the broadcast level and multichannel sound, is greatly expected to personally be used. To realize this, a variety conditions must be satisfied.

[0005] The most important factor is the price of the DVD system, which permits the system to be widely used. The manufacturing easiness and IC techniques must be considered to satisfactorily reduce the cost of the DVD system.

[0006] To reduce the cost of the DVD system, it might be feasible to record, on the DVD, sub-information, such as commercial information from an advertiser, in such a manner that the commercial is inserted into main information, such as a movie. However, simple insertion and recording of sub-information on main information has a problem in that sub-information can easily be skipped (by instructing fast forward movement) by a user when the reproduction of the commercial has been started and thus sub-information cannot reliably be presented to the user.

[0007] Accordingly, an object of the present invention is to provide an information reproducing apparatus capable of reliably presenting important sub-information (for example, a commercial) for supplementing main information, such as a movie, recorded on an information recording medium or important information relating to a main sponsor when the information recording medium, such as a DVD, is reproduced whereby greatly contributing to wide use of the DVD system.

[0008] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided an information reproducing apparatus comprising:

[0009] reading means for reading main information, sub-information and a control code from an information recording medium on which the main information, the sub-information and the control code for distinguishing the main information and the sub-information from each other have been recorded;

[0010] reproducing means for reproducing the main information and sub-information read by the reading means; and

[0011] first inhibition means for inhibiting an interruption of sub-information reproduction by the reproducing means.

[0012] According to a second aspect of the present invention, the information reproducing apparatus according to the first aspect has a structure such that the information recording medium is a DVD.

[0013] According to a third aspect of the present invention, the information reproducing apparatus according to the first aspect has a structure such that

[0014] the first inhibition means comprises:

[0015] determination means for determining whether or not the control code read by the reading means indicates the sub-information;

[0016] first setting means for setting a skip flag to be a first value in a case where the determination means has determined that the control code indicates the sub-information; and

[0017] second inhibition means for inhibiting an interruption of sub-information reproduction in a case where the skip flag has been set to be the first value by the first setting means.

[0018] According to a fourth aspect of the present invention, there is provided the information reproducing apparatus according to the third aspect further comprising:

[0019] second setting means for setting the skip flag to be a second value in a case where the determining means has determined that the control code indicates main information; and

[0020] means for fast-forward-moving main information which is being reproduced by the reproducing means in a case where fast forward movement has been instructed by a user and the skip flag has been set to be the second value by the second setting means.

[0021] According to a fifth aspect of the present invention, the information reproducing apparatus according to the first aspect has a structure such that main information is information of described contents of a movie, and sub-information is information of described commercial from a sponsor of the movie.

[0022] The information reproducing apparatuses according to the first to fifth aspects enable instruction of fast forward movement of sub-information from a user to be ignored. Thus, important sub-information for supplementing main information or important information relating a main sponsor can reliably be presented to a user.

[0023] According to a sixth aspect of the present invention, there is provided a first storage medium having program code instructions stored thereon when executed by a processor, the instructions comprising:

[0024] means for causing the processor to read main information, sub-information and a control code from a second storage medium on which the main information, the sub-information and the control code for distinguishing the main information and the sub-information from each other have been recorded;

[0025] means for causing the processor to reproduce read main information and sub-information; and

[0026] means for causing the processor to inhibit an interruption of sub-information reproduction in a case where the sub-information is being reproduced.

[0027] According to a seventh aspect of the present invention, there is provided an information reproducing apparatus comprising:

[0028] reading means for reading main information, sub-information and control information from an information recording medium on which the main information, the sub-information and the control information including a condition under which reproduction of sub-information is started and a condition under which reproduction of sub-information is ended have been recorded;

[0029] first reproduction means for reproducing the main information read by the reading means;

[0030] recording means for recording the control information read by the reading means;

[0031] first determination means for determining whether or not the main information which is reproduced by the first reproducing means or contents of instruction from a user are adaptable to the condition under which reproduction of the sub-information is started; and

[0032] second reproducing means for reproducing the sub-information read by the reading means in a case where the first determination means has determined that the main information or the contents are adaptable to the condition under which reproduction of the sub-information is started.

[0033] According to an eighth aspect of the present invention, there is provided the information reproducing apparatus according to the seventh aspect further comprising:

[0034] second determination means for determining whether or not the condition under which reproduction of sub-information recorded by the recording means is ended is satisfied during reproduction of sub-information by the second reproduction means; and

[0035] means for ending reproduction of sub-information by the second reproduction means in a case where the second determination means has determined that the condition under which reproduction of sub-information is ended is satisfied.

[0036] According to a ninth aspect of the present invention, there is provided the information reproducing apparatus according to the eighth aspect having a structure such that

[0037] the condition under which reproduction of sub-information is ended is time elapsed by a predetermined period of time after reproduction of sub-information has been started by the second reproducing means.

[0038] According to a tenth aspect of the present invention, the information reproducing apparatus according to the seventh aspect has a structure such that the information recording medium is a DVD.

[0039] According to an eleventh aspect of the present invention, the information reproducing apparatus according to the seventh aspect has a structure such that main information is information of described contents of a movie, and sub-information is information of a described commercial of a sponsor of the movie.

[0040] According to a twelfth aspect of the present invention, there is provided the information reproducing apparatus according to the seventh aspect further comprising inhibition means for inhibiting an interruption of sub-information reproduction in a case where sub-information is being reproduced by the second reproducing means.

[0041] The information reproducing apparatuses according to the seventh to twelfth aspects have the structure such that sub-information is reproduced in accordance with the condition under which reproduction of sub-information is started and the condition under which reproduction is ended. Therefore, sub-information can be presented at an arbitrary timing.

[0042] According to a thirteenth aspect of the present invention, there is provided a first storage medium having program code instructions stored thereon when executed by a processor, the instructions comprising:

[0043] means for causing the processor to read main information, sub-information and control information from a second medium on which the main information, the sub-information and the control information including a condition under which reproduction of sub-information is started and a condition under which reproduction is ended have been recorded;

[0044] means for causing the processor to reproduce read main information;

[0045] means for causing the processor to record read control information;

[0046] means for causing the processor to determine whether or not the main information which is reproduced or contents of instruction from a user are adaptable to the condition, of recorded control information, under which reproduction of sub-information is started; and

[0047] means for causing the processor to reproduce read sub-information in a case where the main information or the contents are adaptable to the condition under which reproduction of sub-information is started.

[0048] According to a fourteenth aspect of the present invention, the first storage medium according to the thirteenth aspect has a structure such that the instructions further comprise:

[0049] means for causing the process to determine whether or not the condition under which reproduction of recorded sub-information is ended is satisfied during reproduction of sub-information; and

[0050] means for causing the processor to end reproduction of sub-information in a case where a determination has been performed that the condition under which reproduction of sub-information is ended is satisfied.

[0051] According to a fifteenth aspect of the present invention, there is provided an information reproducing apparatus comprising:

[0052] reading means for reading main information, sub-information, network reference information and a control code from an information recording medium on which the main information, the sub-information, the network reference information indicating a network server, to which an access is made, and which indicates whether or not main information and network information are combined with each other and whether or not sub-information and network information are combined with each other, and the control code for distinguishing the main information, the sub-information and the network reference information, have been recorded;

[0053] acquiring means for acquiring network information from the network server in accordance with the network reference information read by the reading means;

[0054] first combining means for combining network information acquired by the acquiring means and the sub-information read by the reading means with each other in a case where the network reference information read by the reading means indicates that the sub-information and the network information are combined with each other; and

[0055] first reproducing means for reproducing information combined by the first combining means.

[0056] According to a sixteenth aspect of the present invention, there is provided the information reproducing apparatus according to the fifteenth aspect further comprising:

[0057] second combining means for combining the network information acquired by the acquiring means and the main information acquired by the reading means with each other in a case where the network reference information read by the reading means indicates that the main information and the network information are combined with each other; and

[0058] second reproducing means for reproducing information combined by the second combining means.

[0059] According to a seventeenth aspect of the present invention, the information reproducing apparatus according to the fifteenth aspect has a structure such that the information recording medium is a DVD.

[0060] According to an eighteenth aspect of the present invention, there is provided the information reproducing apparatus according to the fifteenth aspect further comprising:

[0061] inhibition means for inhibiting an interruption of combined information reproduction in a case where combined information is being reproduced by the first reproducing means.

[0062] According to a nineteenth aspect of the present invention, the information reproducing apparatus according to the fifteenth aspect has a structure such that network information comprises a server changing code with which change of a server, to which an access is made, is instructed and address of a server to which a new access is made, and

[0063] the information reproducing apparatus further comprises

[0064] server changing means for changing data indicating the server to which access is made and included in the network reference information in accordance with the network information.

[0065] According to a twentieth aspect of the present invention, the information reproducing apparatus according to the fifteenth aspect has a structure such that main information is information of described contents of a movie, and sub-information is information of described commercial from a sponsor of the movie.

[0066] The information reproducing apparatuses according to the fifteenth to twentieth aspects have the structure such that network reference information acquired from the network server and sub-information are combined with each other and combined information is reproduced. Therefore, sub-information containing up-to-date contents can be displayed.

[0067] According to a twenty-first aspect of the present invention, there is provided a first storage medium having program code instructions stored thereon when executed by a processor, the instructions comprising:

[0068] means for causing the processor to read main information, sub-information, network reference information and a control code from a second storage medium on which main information, sub-information, network reference information indicating main information and a network server to which an access is made and indicating whether or not main information and network information are combined with each other and whether or not sub-information and network information are combined with each other and the control code for identifying main information, sub-information and network reference information from one another are recorded;

[0069] means for causing the processor to acquire network information from the network server in accordance with read network reference information;

[0070] means for causing the processor to combine acquired network information and read sub-information with each other in a case where read network reference information indicates that sub-information and network information are combined with each other; and

[0071] means for causing the processor to reproduce combined information.

[0072] According to a twenty-second aspect of the present invention, there is provided an information reproducing apparatus comprising:

[0073] reading means for reading main information, sub-information, receiving program information, and a control code from an information recording medium on which the main information, the sub-information, the receiving program information which indicates a program to be received and with which the program which is received is specified and a control code for distinguishing the main information, the sub-information and the receiving program information from one another are recorded;

[0074] receiving means for receiving broadcast program information;

[0075] selection means for selecting the broadcast program information received by the receiving means in accordance with the receiving program information read by the reading means;

[0076] first determining means for determining whether or not the sub-information read by the reading means includes a broadcast information reference code; and

[0077] first reproducing means for reproducing the broadcast program information selected by the selection means in a case where the first determining means has determined that the sub-information includes the broadcast information reference code.

[0078] According to a twenty-third aspect of the present invention, there is provided the information reproducing apparatus according to the twenty-second aspect further comprising:

[0079] second reproducing means for reproducing sub-information read by the reading means in a case where the first determining means has determined that sub-information does not include the broadcast information reference code.

[0080] According to a twenty-fourth aspect of the present invention, there is provided the information reproducing apparatus according to the twenty-second aspect further comprising:

[0081] second reproducing means for reproducing the sub-information read by the reading means;

[0082] second determining means for determining whether or not the control code read by the reading means indicates the sub-information; and

[0083] inhibition means for inhibiting an interruption of sub-information reproduction reproduced by the second reproducing means in a case where the second determining means has determined that the control code indicates the sub-information.

[0084] According to a twenty-fifth aspect of the present invention, the information reproducing apparatus according to the twenty-second aspect has a structure such that the information recording medium is a DVD.

[0085] According to a twenty-sixth aspect of the present invention, the information reproducing apparatus according to the twenty-second aspect has a structure such that main information is information of described contents of a movie, and sub-information is information of described commercial from a sponsor of the movie.

[0086] The information reproducing apparatuses according to the twenty-second to twenty-sixth aspects have the structure such that broadcast program information, which has been selected, is reproduced in the case where broadcast information reference code is included in sub-information. Therefore, up-to-date contents can be displayed.

[0087] According to a twenty-seventh aspect of the present invention, there is provided a first storage medium having program code instructions stored thereon when executed by a processor, the instructions comprising:

[0088] means for causing the processor to read main information, sub-information, receiving program information and a control code from an information recording medium on which the main information, the sub-information, the receiving program information which indicates a program to be received and with which the program which is received is specified and the control code for distinguishing the main information, the sub-information and the receiving program information from one another have been recorded;

[0089] means for causing the processor to select broadcast program information in accordance with read receiving program information;

[0090] means for causing the processor to determine whether read sub-information includes a broadcast information reference code; and

[0091] means for causing the processor to reproduce selecting broadcast program information in a case where a determination has been performed that the sub-information includes the broadcast information reference code.

[0092] Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

[0093] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate presently preferred embodiments of the invention, and together with the general description given above and the detailed description of the preferred embodiments given below, serve to explain the principles of the invention.

[0094] FIG. 1 is a block diagram showing an information reproducing apparatus according to a first embodiment of the present invention;

[0095] FIG. 2A is a diagram showing the format of a record in the information recording medium;

[0096] FIG. 2B is a diagram showing data units in the information recording medium;

[0097] FIG. 3 is a block diagram showing an information reading unit;

[0098] FIG. 4 is a block diagram showing a control unit;

[0099] FIG. 5 is a flow chart of the operation of the information reproducing apparatus according to the first embodiment of the present invention;

[0100] FIG. 6 is a flow chart showing the operation of the information reproducing apparatus according to the first embodiment of the present invention;

[0101] FIG. 7 is a flow chart of the operation of the information reproducing apparatus according to the first embodiment of the present invention;

[0102] FIG. 8A is a diagram showing the format of record in an information reproducing apparatus according to a second embodiment of the present invention;

[0103] FIG. 8B is a diagram showing the format of record in an information reproducing apparatus according to a second embodiment of the present invention;

[0104] FIG. 8C is a diagram showing the format of record in an information reproducing apparatus according to a second embodiment of the present invention;

[0105] FIG. 8D is a diagram showing the format of record in an information reproducing apparatus according to a second embodiment of the present invention;

[0106] FIG. 9 is a block diagram showing a control unit of the information reproducing apparatus according to the second embodiment of the present invention;

[0107] FIG. 10 is a flow chart of the operation (action execution state 1) of the information reproducing apparatus according to the second embodiment of the present invention;

[0108] FIG. 11 is a diagram showing an example of display screen of a GUI when a disk has been loaded;

[0109] FIG. 12 is a flow chart of the operation (action end state 1 and action execution state 2) of the information reproducing apparatus according to the second embodiment of the present invention;

[0110] FIG. 13A is a flow chart of the operation (action end state 2) of the information reproducing apparatus according to the second embodiment of the present invention;

[0111] FIG. 13B is a flow chart of the operation (action end state 2) of the information reproducing apparatus according to the second embodiment of the present invention;

[0112] FIG. 14 is a flow chart of the operation (reproduction of main information and action execution state 3) of the information reproducing apparatus according to the second embodiment of the present invention;

[0113] FIG. 15 is a flow chart of the operation (reproduction of main information) of the information reproducing apparatus according to the second embodiment of the present invention;

[0114] FIG. 16 is a flow chart of the operation (action end state 3) of the information reproducing apparatus according to the second embodiment of the present invention;

[0115] FIG. 17 is a flow chart of the operation (an operation which is performed when fast forward movement is instructed) of the information reproducing apparatus according to the second embodiment of the present invention;

[0116] FIG. 18 is a block diagram showing an information reproducing apparatus according to a third embodiment of the present invention;

[0117] FIG. 19A is a diagram showing the format of record in an information recording medium for use in the information reproducing apparatus shown in FIG. 18;

[0118] FIG. 19B is a diagram showing the format of record in an information recording medium for use in the information reproducing apparatus shown in FIG. 18;

[0119] FIG. 20 is a block diagram showing an information reading unit;

[0120] FIG. 21 is a block diagram showing a control unit;

[0121] FIG. 22 is a block diagram showing a communication unit;

[0122] FIG. 23 is a flow chart showing the operation of the information reproducing apparatus;

[0123] FIG. 24 is a flow chart of the operation (mainly the operation of the communication unit) of the information reproducing apparatus;

[0124] FIG. 25 is a flow chart of the operation (mainly the operation of the information reading unit) of the information reproducing apparatus;

[0125] FIG. 26 is a flow chart of a process for changing the server address which is stored in a control signal generating section of the control unit and to which an access is made;

[0126] FIG. 27 is a block diagram showing an information reproducing apparatus according to a fourth embodiment of the present invention;

[0127] FIG. 28A is a diagram showing the format of record in an information recording medium for use in the information reproducing apparatus according to the fourth embodiment of the present invention;

[0128] FIG. 28B is a diagram showing the format of record in an information recording medium for use in the information reproducing apparatus according to the fourth embodiment of the present invention;

[0129] FIG. 28C is a diagram showing the format of record in an information recording medium for use in the information reproducing apparatus according to the fourth embodiment of the present invention;

[0130] FIG. 29 is a block diagram showing an information reading unit;

[0131] FIG. 30 is a block diagram showing a control unit;

[0132] FIG. 31 is a block diagram showing a receiving unit;

[0133] FIG. 32 is a flow chart of the operation (mainly the operation of the information reading unit and the control unit) of the information reproducing apparatus shown in FIG. 27;

[0134] FIG. 33 is a flow chart of the operation (mainly the operation of the receiving unit) of the information reproducing apparatus shown in FIG. 27;

[0135] FIG. 34 is a flow chart of the operation (mainly the operations of the control unit and the information reading unit) of the information reproducing apparatus shown in FIG. 27;

[0136] FIG. 35 is a block diagram showing another receiving unit; and

[0137] FIG. 36 is a flow chart of the operation of the receiving unit shown in FIG. 35.

[0138] Embodiments of the present invention will now be described with reference to the drawings.

[0139] FIG. 1 is a diagram showing an information reproducing apparatus according to a first embodiment of the present invention.

[0140] Referring to FIG. 1, an information recording medium (hereinafter sometimes also called a “disk”) 1, such as a DVD or CD-ROM, having a main information source and a sub-information source, is arranged to be loaded into an information reading unit 2.

[0141] The format of record of information in the information recording medium 1 is, as shown in FIG. 2A, composed of data units each having a predetermined length. As shown in FIG. 2B, the data units are classified into two types which are data units each having main information stored therein and data units each having sub-information stored therein.

[0142] Each data unit is composed of a control code storage section in which a control code for distinguishing main information and sub-information from each other; and an information storage section for storing main information data or sub-information data in such a manner that data has a predetermined length.

[0143] Main information is information of description of the contents of, for example, a movie, while sub-information is information of description of, for example, a commercial from a sponsor of the movie.

[0144] When the information reading unit 2 has read information in each data unit from the information recording medium 1, the information reading unit 2 transfers the code included in the data unit to the control unit 3.

[0145] In accordance with the control code transferred from the information reading unit 2 and the contents of an instruction issued from a user and transferred through the GUI, the control unit 3 controls reproduction of main information and sub-information.

[0146] The reproducing unit 4 reproduces main information or sub-information transferred from the information reading unit 2 to follow the control performed by the control unit 3, reproduced information being displayed on the GUI 5.

[0147] FIG. 3 is a block diagram showing the information reading unit 2 which comprises a disk input section 2a, a control information output section 2band a control information input section 2c.

[0148] The disk 1 is injected into the disk input section 2aso that information in each data unit is read from the disk 1 by reading head or the like.

[0149] The control code read by the disk input section 2aand included in the data unit is transferred to the control information output section 2b, and then output to the control unit 3.

[0150] A variety of control instruction information items (signals) output from the control unit 3 are arranged to be supplied to the control information input section 2c.

[0151] FIG. 4 shows the control unit 3 which comprises an operation determining section 3a, a control signal generating section 3band a skip flag storage section 3c.

[0152] The operation determining section 3areceives the control code output from the information reading unit 2, and then analyzes the contents of the control code so that the operation determining section 3adetermines whether the operation is the operation for reproducing main information or the operation for reproducing sub-information.

[0153] In the skip flag storage section 3c, a skip flag is stored with which whether or not a skip instructed from the user through the GUI 5 when information is reproduced is performed is determined.

[0154] When a determination has been performed that the control code is sub-information code, the operation determining section 3asets (FALSE) the skip flag. When a determination has been performed that the control code is main information code, the operation determining section 3aresets (TRUE) the skip flag.

[0155] The control signal generating section 3bgenerates a signal which is transmitted to the information reading unit 2 in accordance with an instruction issued from the operation determining section 3a.

[0156] Referring to a flow chart shown in FIGS. 5 to 7, the operation of the information reproducing apparatus shown in FIG. 1 will now be described.

[0157] When the user has loaded the disk 1 into a predetermined position in the information reading unit 2, the disk input section 2areads the data unit from the disk 1 (step S1).

[0158] The disk input section 2atransfers the control code included in the read data unit to the control information output section 2b(step S2). The control information output section 2boutputs the control code transferred from the disk input section 2ato the control unit 3 (step S3).

[0159] The operation determining section 3aof the control unit 3 receives the control code transferred from the control information output section 2b(step S4). If the control code is sub-information code (step S5), the operation proceeds to step S6 so that the operation determining section 3aturns on (FALSE) the skip flag stored in the skip flag storage section 3c. If the control code is main information code, the operation proceeds to step S7 so that the operation determining section 3aresets the skip flag (TRUE).

[0160] Then, the operation determining section 3ainstructs the control signal generating section 3bto issue a reproduction instruction signal of information (main information/sub-information) in accordance with the control code (step S8). Thus, the control signal generating section 3boutputs the reproduction instruction signal to the information reading unit 2 (step S9).

[0161] When the control information input section 2cof the information reading unit 2 has received the reproduction instruction signal from the control signal generating section 3b(step S10 shown in FIG. 6), the control information input section 2cfurther transfers the reproduction instruction signal to the disk input section 2a(step S11).

[0162] The disk input section 2aoutputs main information or sub-information stored in the read data unit to the reproducing unit 4 (step S12). Then, the reproducing unit 4 reproduces information (step 13), and then reproduced information is displayed through the GUI 5.

[0163] The above-mentioned process is repeated whenever the data unit is read by the information reading unit 2.

[0164] The operation, which is performed by the information reproducing apparatus shown in FIG. 1 when the user has issues an instruction of “fast forward movement” through the GUI 5, will now be described with reference to a flow chart shown in FIG. 7. At this time, the instruction of fast forward movement is issued from the GUI 5 to the control unit 3.

[0165] When the operation determining section 3aof the control unit 3 has received the instruction of the fast forward movement (step S14), the operation determining section 3achecks the state (that is, the value) of the skip flag stored in the skip flag storage section 3c. If the skip flag is “TRUE”, that is, if main information is being reproduced, the operation proceeds to step S16. If the skip flag is “FALSE”, that is, if sub-information is being reproduced, the instruction of fast forward movement is ignored.

[0166] When the operation determining section 3ahas received the instruction of the fast forward movement in a state where main information is being reproduced, the operation determining section 3ainstructs the control signal generating section 3bto issue a fast forward movement instruction signal (step S16). Thus, the control signal generating section 3boutputs the fast forward movement instruction signal to the information reading unit 2 (step S17). As a result, a predetermined fast forward movement operation is executed by the information reading unit 2, and then fast forward movement information is displayed on the GUI 5.

[0167] As described above, according to the first embodiment, a control code for distinguishing main information and sub-information from each other is additionally recorded for each reading unit (the data unit) on the information recording medium 1.

[0168] Whenever the information reading unit 2 reads the disk, the operation determining section 3aof the control unit 3 updates the skip flag. When information is reproduced, a reference to the skip flag is made. When main information is reproduced, the fast forward movement can be instructed to follow an instruction from a user. When sub-information is reproduced, the instruction of the fast forward movement is ignored.

[0169] As a result, sub-information for supplementing main information or sub-information which is important information, for example, information of sponsor of main information, can reliably be presented to the user.

[0170] An information reproducing apparatus according to a second embodiment of the present invention will now be described.

[0171] The overall structure of the information reproducing apparatus according to the second embodiment is similar to that shown in FIG. 1 except for the structure of the control unit 3, that of the format of record and the overall operation being different from those shown in FIG. 1.

[0172] FIGS. 8A to 8D show a specific example of the format of record for use in the information reproducing apparatus according to the second embodiment of the present invention.

[0173] The format with which information is recorded by the disk 1 is, as shown in FIG. 8A, composed of a portion for storing control information, a portion for storing sub-information and a portion for storing main information.

[0174] Control information is composed of a set consisting of a plurality of conditions (for example, a control condition, an action and an end condition) and an action.

[0175] The action is an irregular command to read or reproduce sub-information or main information which is generated during usual operation for reading or reproducing main information or sub-information.

[0176] The control condition is an action start condition which is determined in accordance with information or the like communicated to the control unit 3 through the information reading unit 2 or the GUI 5. The control condition is instructed with a specific control code in, for example, the title of a short film, main information or sub-information communicated through the information reading unit 2 or offset address (frame number or the like permitted) from the leading end of main information which is being reproduced, the ID of the information reproducing apparatus communicated through the GUI 5, the user ID, an operation instruction issued from the user or their combination.

[0177] The end condition is an end condition which is determined in accordance with information or the like communicated to the control unit 3 through the information reading unit 2 or the control unit 3 and under which the action is ended. The end condition is instructed with, for example, null, a specific control code in main information or sub-information, which is being reproduced, elapsed time from start of the action or their combination.

[0178] If the end condition is null, a determination is performed that the action can be ended at any time. If an end condition is instructed, a determination is performed that completion of the action is inhibited before the end condition is satisfied.

[0179] Control information is sometimes embedded in main information or sub-information as an alternative to the state where control condition is stored in the main information storage section or the sub-information storage section.

[0180] Main information data, which is stored in the main information storage section, is a set of, for example, short films (main information A, main information B, main information C, . . . , ), as shown in FIG. 8B. Sub-information data which is stored in the sub-information storage section is set of a plurality of, for example, commercial information (sub-information×1, sub-information×2, sub-information×3, sub-information×4, . . . , ), as shown in FIG. 8C. Main information data and sub-information data sometimes include a control code (cc) which may serve as the action start condition or end condition.

[0181] FIG. 9 is a block diagram showing the control unit 3, which comprises a operation determining section 3a, a control signal generating section 3b, a timer 3dand a control information storage section 3e.

[0182] The operation determining section 3atransfers, to the control information storage section 3e, control information transferred from the information reading unit 2. Moreover, the operation determining section 3aanalyzes the contents of various information items communicated though the information reading unit 2 and the GUI 5. In addition, the operation determining section 3amakes a reference to the control condition and the end condition contained in the control information stored in the control information storage section 3eso as to determine the operation, for example, reproduction of main information, reproduction of sub-information or start or end of the action.

[0183] The control information storage section 3ereceives control information read from the disk 1 through the operation determining section 3aand stores control information when the disk 1 has been loaded into the information reading unit 2 and the reading operation has been started.

[0184] When the operation determining section 3ahas determined that the action is started, that is, when a determination has been performed that, for example, sub-information×2 is reproduced in a state where reproducing time of sub-information×2 has been instructed as the action end condition, the instructed time is set to the timer 3dby the operation determining section 3awhen sub-information×2 is reproduced.

[0185] The control signal generating section 3bissues a signal which is output to the information reading unit 2 in accordance with an instruction issued from the operation determining section 3a.

[0186] Referring to a flow chart shown in FIG. 10 and ensuing figures, the operation of the information reproducing apparatus according to the second embodiment will now be described.

[0187] An example of control information stored in the control information storage section of the disk 1 for use in the following description will now be described.

[0188] Control Information: (Control Condition and Action and End Condition)

[0189] Control Information 1: (Disk set, (Reproduction of Sub-Information×1 and Position at which Sub-Information×1 is Recorded), null)

[0190] Control Information 2: (title 1, (Reproduction of Sub-Information×2 and Position at which Sub-Information×2 is Recorded) and Reproducing Time t1)

[0191] Control Information 3: (Offset p1 of Main Information A, (Reproduction of Sub-information×3 and Position at Which Sub-Information is Recorded) and Control Code ccQ1)

[0192] The control code included in sub-information is hereinafter used only as the action end condition.

[0193] Referring to the flow chart shown in FIG. 10, when a user has loaded the disk 1 into a predetermined position in the information reading unit 2, the disk input section 2areads control information from the control information storage section of the disk 1 (step S20).

[0194] When control information read by the disk input section 2aand information notifying the operation performed by the user, that is, “disk set” has been transferred to the control information output section 2b(step S21), the control information output section 2boutputs control information and the “disk set” to the control unit 3 (step S22).

[0195] When the operation determining section 3aof the control unit 3 has received control information and the “disk set” (step S23), the operation determining section 3ainitially transfers control information to the control information storage section 3e(step S24). Control information is stored in the control information storage section 3e(step S25).

[0196] On the other hand, the operation determining section 3auses the “disk set” as a key to retrieve control information having the control condition which is the “disk set” among control information stored in the control information storage section 3e(step S26).

[0197] If control information having the control condition corresponding to the key “disk set” is not detected (step S27), a state where an instruction from the user is waited for is realized (step S28).

[0198] If control information corresponding to the “disk set” is detected, the contents of the action included in control information 1, that is, reproduction of sub-information×1 is executed. At this time, the operation determining section 3atransfers, to the control signal generating section 3b, the position, at which sub-information×1 is recorded, and an instruction to issue a signal instructing reproduction of sub-information×1 (step S29).

[0199] The control signal generating section 3boutputs the signal instructing reproduction of sub-information×1 to the information reading unit 2 together with the position at which sub-information×1 is recorded (step S30). When the control information input section 2cof the information reading unit 2 has received the reproduction instruction signal from the control signal generating section 3b, the control signal generating section 3bfurther transfers the reproduction instruction signal to the disk input section 2a.

[0200] The disk input section 2areads instructed sub-information×1 from the position at which sub-information×1 is recorded, and then outputs it to the reproducing unit 4. Sub-information×1 reproduced by the reproducing unit 4 is displayed by the GUI 5, for example, as shown in FIG. 11 (step S31).

[0201] The sub-information×1 is displayed on the GUI 5 in such a manner that titles of main information A, B and C, which have been recorded on the disk 1, that is, “title 1”, “title 2” and “title 3” and corresponding sponsors are displayed, as shown in FIG. 11.

[0202] An assumption is made that the user has selected “title 1” (main information A) by clicking it with a mouse or the like. Thus, a signal instructing reproduction of “title” 1 is output to the operation determining section 3aof the control unit 3 through the GUI 5 (step S32 shown in FIG. 12). The operation determining section 3areceives the reproduction instruction signal and determines that the action of control information 1 has been ended (because the end condition of control information 1 is “null”), and then instructs the control signal generating section 3bto generate a signal to interrupt reproduction of sub-information×1 (step S33).

[0203] The control signal generating section 3boutputs reproduction interruption instruction signal to the information reading unit 2 (step S34) so that reproduction of sub-information×1 is interrupted and the action of control information 1 is ended (step S35).

[0204] When the operation determining section 3ahas received the signal instructing the reproduction of “title 1” in step S32 shown in FIG. 12, the operation determining section 3auses the “title 1” as a key to retrieve control information having the control condition “title 1” among control information stored in the control information storage section 3e(step S36).

[0205] If no control information having the control condition corresponding to the key “title 1” is detected, the operation determining section 3ainstructs the control signal generating section 3bto generate a signal instructing reproduction of “title 1” (main information A) to follow the instruction from the user (step S38).

[0206] The signal instructing reproduction of main information A is output from the control signal generating section 3bto the information reading unit 2 (step S39) so that reproduction of main information A is started (step S40).

[0207] If control information (control information 2) having the control condition corresponding to “title 1” is detected in step S37 shown in FIG. 12, the operation proceeds to step S41 shown in FIG. 13A so that the contents of the action included in control information 2, that is, reproduction of sub-information×2 is executed.

[0208] At this time, the operation determining section 3atransfers, to the control signal generating section 3b, an instruction to issue a signal instructing reproduction of sub-information×2 together with the position at which sub-information×2 has been recorded (step S41). The control signal generating section 3boutputs, to the information reading unit 2, the signal instructing reproduction of sub-information×2 together with the position at which sub-information×2 has been recorded (step S42) similarly to the above-mentioned process (step S31 shown in FIG. 10) so that reproduction of sub-information×2 is started (step S43).

[0209] Since control information 2 has instructed time t1 for which sub-information×2 is reproduced, the operation determining section 3asets t1 to the timer 3d(step S44) so that measurement of the time for which sub-information×2 is reproduced is started.

[0210] When the operation determining section 3ahas received information indicating lapses of reproduction time t1 from the timer 3d(step S45 shown in FIG. 13B), the operation determining section 3ainstructs the control signal generating section 3bto generate a signal instructing interruption of reproduction of sub-information×2 (step S46). Thus, the control signal generating section 3boutputs reproduction interruption instruction signal to the information reading unit 2 (step S47) so that reproduction of sub-information×2 is interrupted. Thus, the action of control information 1 is ended (step S48). Then, the operation returns to step S38 shown in FIG. 12 so that the operation returns to the process for reproducing “title 1” (main information A) previously instructed by the user.

[0211] As described above, when the user has instructed reproduction of “title 1”, sub-information×2 (for example, a commercial from a sponsor) instructed with control information is reproduced for predetermined time, and then the instructed title is reproduced.

[0212] Referring to a flow chart shown in FIGS. 14 to 16, the operation for reproducing main information (step S40 shown in FIG. 12) and the operation for starting and ending the action during reproduction of the foregoing main information will now be described.

[0213] When the reproduction instruction signal output from the control signal generating section 3bis by the control information input section 2cof the information reading unit 2 to follow the instruction issued from the operation determining section 3aof the control unit 3 (step S50), the disk input section 2areads instructed information data in predetermined length units from the instructed position in the disk 1 as briefly described in step S31 shown in FIG. 10 (step S51).

[0214] If reading of information data is ended at this time, the reproduction process is ended (step S52).

[0215] Then, whether or not a control code is included in information data having a predetermined length (for example, a predetermined number of bytes) read by the disk input section 2ais determined (step S53).

[0216] If no control code is included, the disk input section 2atransfers the offset address of read information data and the number of read bytes to the control information output section 2b(step S54).

[0217] The transferred offset address of information data and the number of read bytes are output from the control information output section 2bto the control unit 3 (step S55).

[0218] When the operation determining section 3aof the CONTROL UNIT 3 receives the offset address of information data and the number of read bytes (step S56), retrieval of control information stored in the control information storage section 3eis performed (step S57).

[0219] The above-mentioned retrieval is performed in such a manner that control conditions included in the range from the offset range supplied from the information reading unit 2, that is, from the offset address supplied from the disk input section 2ato the sum of the offset address received from the disk input section 2aand the number of bytes supplied from the disk input section 2aare retrieved in the control information storage section.

[0220] If control information including the control condition adaptable to the supplied offset range is detected (step S58), the operation proceeds to step S70 so that the contents of the action included in the control condition are executed. If no adaptable control information is detected (step S58), the operation proceeds to step S59 shown in FIG. 15 so that the information reading unit 2 performs the process for reproducing read information data.

[0221] That is, as shown in the flow chart shown in FIG. 15, the operation determining section 3ainstructs the control signal generating section 3bto issue a reproduction instruction signal (step S59). The control signal generating section 3boutputs the reproduction instruction signal to the information reading unit 2 (step S60).

[0222] When the control information input section 2cof the information reading unit 2 has received reproduction instruction signal (step S61), the reproduction instruction signal is transferred to the disk input section 2a(step S62). The disk input section 2aoutputs read information data to the control unit 3 (step S63) so that a reproduced image is displayed on the GUI 5.

[0223] If no information serving as a control condition is included in information data read by the disk input section 2a, the reproduction of information is performed in such a manner that the processes in steps S51 to step S63 are repeated.

[0224] If control information including a control condition adaptable to the supplied offset range is detected in step S58, the contents of the action included in the control condition are executed.

[0225] An example case will now be described in which a control condition adaptable to the offset range, that is, control information 3 including offset p1 as the control condition is detected in data read by the information reading unit 2.

[0226] Since the contents of the action of control information 3 are reproduction of sub-information×3, the operation determining section 3atransfers, to the control signal generating section 3b, an instruction to issue a signal instructing reproduction of sub-information×3 and the position at which sub-information×3 has been recorded (step S70).

[0227] The control signal generating section 3boutputs, to the information reading unit 2, the signal instructing reproduction of sub-information×3 and the position at which sub-information×3 has been recorded (step S71). As a result, reproduction of sub-information×3 is started (step S72).

[0228] The operation for reproducing sub-information in step S72 is similar to the process in steps S50 to step S63. An assumption is made that a fact has been detected that a control code is included in information data read in step S53 and read by the disk input section 2aduring reproduction of sub-information×3.

[0229] The operation which is performed at this time will now be described with reference to a flow chart shown in FIG. 16. That is, a control code is transferred from the disk input section 2aof the information reading unit 2 to the control information output section 2b(step S80). Then, the control code is output from the control information output section 2bto the control unit 3 (step S81).

[0230] When the operation determining section 3aof the control unit 3 has received the control code (step S82), control information having the control code as the end condition or the control condition is retrieved in the control information storage section 3e(step S83). If no adaptable control information exists (step S84), the operation returns to step S54 shown in FIG. 14 so that reproduction of, for example, sub-information×3 is continued (step S85).

[0231] If the control code is ccQ1 which is an action end condition instructed with control information 3 (step S84), the operation determining section 3ainstructs the control signal generating section 3bto issue a signal instructing interruption of reproduction of sub-information×3 (step S90).

[0232] Then, the control signal generating section 3boutputs the signal to instruct interruption of reproduction to the information reading unit 2 (step S91) so that reproduction of sub-information×3 is interrupted. Thus, the action of control information 3is ended.

[0233] Then, the operation determining section 3ainstructs the control signal generating section 3bto issue a return reproduction instruction signal (step S93). Thus, the return reproduction instruction signal is output from the control signal generating section 3bto the information reading unit 2 (step S94) so that reproduction of main information A is restarted (step S95).

[0234] In step S95 the operation returns to step S50 shown in FIG. 14 so that a similar process is performed. Thus, reproduction of main information A is restarted.

[0235] The operation which is performed when an instruction of fast forward movement is issued from a user through the GUI 5 during reproduction of information will now be described with reference to a flow chart shown in FIG. 17.

[0236] The instruction of fast forward movement is received by the operation determining section 3aof the control unit 3 through the GUI 5 (step S100).

[0237] The operation determining section 3adetermines whether the end condition of the action which is being executed has been satisfied, that is, whether sub-information is being reproduced (step S101). When sub-information is being reproduced, the instruction of fast forward movement is ignored (step S102).

[0238] If no action is being performed, that is, if main information (a short film or the like) is being reproduced, the operation determining section 3ainstructs the control signal generating section 3bto issue a fast forward movement instruction signal (step S103). Thus, the control signal generating section 3boutputs the fast forward movement instruction signal to the information reading unit 2 (step S104) so that fast forward reproduction of main information is performed.

[0239] As described above, according to the second embodiment, when reproduction of information recorded on the disk 1 is started, control information of the described reproduction start condition (the control condition) and reproduction end condition of sub-information are read as the action to store control information in the control information storage section 3eof the control unit 3.

[0240] The operation determining section 3aof the control unit 3 starts reproducing sub-information if instruction information received through the GUI 5 and information read from the disk 1 by the information reading unit 2 include information adaptable to the condition under which sub-information stored in the control information storage section 3eis started.

[0241] If the reproduction end condition stored in the control information storage section 3eis detected during reproduction of sub-information, reproduction of sub-information is ended and the operation returns to reproduction of main information. As a result, arbitrary setting of action control condition and end condition enables a commercial (sub-information) from a sponsor to easily be inserted into an arbitrary position of a short film (main information) which is being reproduced. Moreover, restoration to reproduction to the film, which has been interrupted after the commercial has been ended, can easily be performed.

[0242] The operation for inhibiting skip of the reproduction of a commercial (sub-information) and the operation for reproducing a commercial for predetermined time enable important sub-information for supplementing main information or important sub-information relating to the sponsor to reliably be presented to a user.

[0243] An information reproducing apparatus according to a third embodiment of the present invention will now be described.

[0244] Each of the information reproducing apparatuses according to the first and second embodiments is able to insert a commercial from a sponsor into a short film at an adequate timing and inhibit skip of the commercial by a user.

[0245] However, the contents of the commercial have been determined when the disk has been manufactured. Therefore, a latest commercial cannot always be inserted. The third embodiment is able to solve the above-mentioned problem.

[0246] FIG. 18 shows the information reproducing apparatus according to the third embodiment of the present invention. The same elements as those shown in FIG. 1 are given the same reference numerals, and only the different elements will now be described.

[0247] That is, the control unit 3 outputs a control signal to a communication unit 10 if necessary to perform control. When the communication unit 10 has received the predetermined control signal from the control unit 3, the communication unit 10 makes an access to a predetermined network server 11 through a communication network to obtain required information, and then outputs information to the information reading unit 2.

[0248] Information received through the network server 11 is hereinafter sometimes called network information.

[0249] FIG. 19 shows the format of record for use in the information reproducing apparatus according to the third embodiment of the present invention.

[0250] The format for recording information for use in the disk 1 is, as shown in FIG. 19A, composed of data units each having a predetermined length. The data unit is one reading unit. Each data unit includes three types as shown in FIG. 19B.

[0251] That is, the data unit includes a data unit in which main information is stored, a data unit in which sub-information is stored and a data unit in which network reference information for obtaining sub-information through the network is stored.

[0252] Each data unit is composed of a control code storage section for storing main information, sub-information and a control code for distinguishing network reference information; and an information storage section for storing main information or sub-information to have a predetermined length.

[0253] Network reference information may include, for example, the address of the network server 11, to which an access must be made, information whether combining of information is performed and an instruction of the method of combining information.

[0254] Sub-information may include information for identifying network information which must be reproduced.

[0255] FIG. 20 shows the information reading unit 2. The same elements as those shown in FIG. 3 are given the same reference numerals, and only the different elements will now be described. That is, a network information input section 2dand an information combining section 2eare added.

[0256] The network information input section (a NW information input section) 2dreceives, from the communication unit 10, information (mainly sub-information) received by the communication unit 10 and supplied from the network server 11 so as to subject information to a predetermined information process and then transfer information to the information combining section 2e.

[0257] The information combining section 2eis controlled by the control unit 3 to combine information transferred from the network information input section 2dwith information transferred from the disk input section 2aif necessary, and then outputs combined information to the reproducing unit 4.

[0258] FIG. 21 is a block diagram showing the control unit 3 having a structure similar to that shown in FIG. 4 except for a structure in which a control signal generated by the control signal generating section 3bis output to the communication unit 10 as well as to the information reading unit 2.

[0259] The control unit 3 supplies an instruction of reproduction which is classified into three types, that is, an instruction to reproduce a disk, an instruction to reproduce information of the network and an instruction to reproduce combined information.

[0260] When the information combining section 2ehas received the instruction to reproduce the disk, the information combining section 2ereads information (main information or sub-information) data from the disk input section 2ato transfer information to the reproducing unit 4.

[0261] When an instruction to reproduce information of the network has been received, the information combining section 2ereads data of information about the network from the network information input section 2dto transfer data to the reproducing unit 4.

[0262] The instruction to reproduce combined information may include the instruction of the method of combining information. For example, a combining method is included with which a computer graphics (CG) image is reproduced on a background formed by image data obtained by the disk input section 2a.

[0263] When the information combining section 2ehas received the instruction to reproduce combined information, the information combining section 2ereads information data from the disk input section 2a, and then reads data of information of the network from the network information input section 2d. Then, the method instructed with the instruction to reproduce combined information is employed to combine data obtained from the disk input section 2aand the network information input section 2d.

[0264] FIG. 22 is a block diagram showing the communication unit 10 which comprises a control information input section 10aand a network access section (NW access section) 10b.

[0265] When the control information input section 10ahas received any one of various information (signals) for instructing control from the control unit 3, the control information input section 10asubjects information (the signal) to a predetermined process, and then transfers it to the network access section 10b.

[0266] The network access section 10bfollows the instruction from the control unit 3 received through the control information input section 10aso that the network access section 10breceives information through the network. Then, the network access section 10boutputs information to the information reading unit 2.

[0267] Referring to a flow chart shown in FIGS. 23 to 25, the operation of the information reproducing apparatus shown in FIG. 18 will now be described.

[0268] When a user has loaded the disk 1 into a predetermined position in the information reading unit 2, the disk input section 2areads one data unit from the disk 1 (step S110).

[0269] When the disk input section 2ahas transferred the control code included in the read data unit to the control information output section 2b(step S111), the control information output section 2boutputs the control code to the control unit 3 (step S112).

[0270] The operation determining section 3aof the control unit 3 receives the control code (step S113). If the control code is sub-information code (step S114), the operation proceeds to step S115 so that the skip flag stored in the skip flag storage section 3cis turned on (FALSE). That is, the fast forward movement operation is inhibited.

[0271] If the control code is another code (a main information code or a network reference code), the operation proceeds to step S116.

[0272] If the control code is the main information code (step S116), the operation proceeds to step S117 so that the skip flag stored in the skip flag storage section 3cis reset (TRUE). That is, the fast forward movement is permitted.

[0273] When the control code is the network reference code, the operation proceeds to step S118 so that the skip flag stored in the skip flag storage section 3cis turned on (FALSE). That is, the fast forward movement operation is inhibited.

[0274] When the control code is the sub-information code or the main information code, the operation determining section 3ainstructs the control signal generating section 3bto issue a signal instructing reproduction of the disk (step S119). The control signal generating section 3boutputs the instruction to reproduce the disk to the information reading unit 2 (step S120).

[0275] When the control code is the network reference code, the operation determining section 3ainstructs the control signal generating section 3bto issue the address of the network server 11 included in the network reference information and a signal instructing to make an access to the network (step S121). The control signal generating section 3breceives the address and the signal so that the control signal generating section 3boutputs the signal instructing to make an access to the network to the communication unit 10 (step S122).

[0276] When the control information input section 10aof the communication unit 10 receives the signal instructing to make an access to the network (step S130 shown in FIG. 24), the signal instructing to make an access to the network is further transferred to the network access section 10b(step S131).

[0277] When the network access section 10bhas connected to the network server 11 having the supplied address through a predetermined network, the connected network server 11 reads a predetermined information data from a database 12 to transmit information data to the information reproducing apparatus. When the network access section 10bhas received information data (step S132), received data (network information) is further output to the information reading unit 2 (step S133).

[0278] When the network information input section 2dof the information reading unit 2 receives network information output from the communication unit 10, the network information input section 2dtemporarily stores network information (step S134).

[0279] Then, the control unit 3 outputs, to the information reading unit 2, the network reproduction instruction signal or combined information reproduction signal at an adequate timing if identification information of information of network is included in the data unit which is identified with the sub-information code which has been read next.

[0280] When the control information input section 2cof the information reading unit 2 receives the disk reproduction instruction signal or network information reproduction instruction signal or the combined information reproduction instruction signal output from the control unit 3 (step S140 shown in FIG. 25), it is transferred from the control information input section 2cto the information combining section 2e(step S141).

[0281] In accordance with the type of the received reproduction instruction signal, the information combining section 2ereads network information temporarily stored in the network information input section 2dand main information or sub-information read by the disk input section 2a, and then performs combining or the like in accordance with the type of the reproduction instruction signal (step S142) to output it to the reproducing unit 4 (step S143).

[0282] When an access is made to a network, a longer time is sometimes taken as compared with time required to read a disk. Therefore, it is preferable that the data unit including the network reference code for instructing an access to the network is positioned sufficiently forward of the position of sub-information at which network information is actually required.

[0283] The address of the network server to which an access is made may be stored in the control signal generating section 3b. In this case, the network server access instruction signal, which is output from the control signal generating section 3bto the communication unit 10 when the operation determining section 3ahas instructed the control signal generating section 3bto issue the network server access instruction signal in step S121 shown in FIG. 23, may include the address of the network server to which the access is made.

[0284] There is sometimes a case where information stored in the information reproducing apparatus is required to be changed from the network server 11. For example, when the information reproducing apparatus reads the network server reference code, the address of the server, which has been stored in the control signal generating section 3band to which an access is made, is sometimes required to be changed.

[0285] In actual, a great load is required for the communication line and the server apparatus if a multiplicity of information reproducing apparatuses simultaneously make accesses to the network server 11. To disperse the load, the unit for reading the network information must be changed.

[0286] The operation of changing the address of the network server previously stored in the information reproducing apparatus shown in FIG. 18 will now be described with reference to a flow chart shown in FIG. 26.

[0287] As described above (step S132 shown in FIG. 24), network information data transferred from the network server 11 has been stored in the network information input section 2dof the information reading unit 2 on the basis of the network server reference code on the disk 1. A server changing code for changing the server to which an access is made and the address of a server to which a new access is made may be described in data.

[0288] When the network information input section 2dreceives information of the network, the network information input section 2dchecks whether or not the code for changing the server is included in information of the network (step S150). If the code is included, the code for changing the server and new address are transferred to the control information output section 2b(step S151). When the control information output section 2b, which has received the code and the address, outputs, to the control unit 3, the code for changing the server and the address of the server to which a new access is made (step S152), the operation determining section 3aof the control unit 3 receives the code and the address (step S153), and then updates the address of the server, which has been stored in the control signal generating section 3band to which an access is made, to new address (step S154).

[0289] The operation, which is performed by the information reproducing apparatus shown in FIG. 20 when the instruction of “fast forward movement of the disk” has been instructed through the GUI 5, is similar to that described in the flow chart shown in FIG. 7.

[0290] As described above, according to the third embodiment, the control code included in the data unit on the disk 1 is checked by the operation determining section 3aof the control unit 3.

[0291] The control unit 3 instructs the information reading unit 2 to reproduce information (main information or sub-information) on the disk 1, reproduce information (sub-information) obtained through the network or reproduce information obtained by combining the above-mentioned information in accordance with the type of the control code.

[0292] As a result, important sub-information for supplementing main information or important sub-information relating to the sponsor of main information can reliably be presented to a user. Moreover, a commercial (sub-information) including up-to-date information can easily be displayed if necessary during reproduction of the disk 1.

[0293] An information reproducing apparatus according to a fourth embodiment of the present invention will now be described.

[0294] FIG. 27 is a diagram showing the information reproducing apparatus according to the fourth embodiment of the present invention. The same elements as those shown in FIG. 18 are given the same reference numerals, and the different elements will now be described. That is, a receiving unit 20 is substituted for the communication unit 10 shown in FIG. 18.

[0295] The receiving unit 20 receives a broadcast signal transmitted from a predetermined broadcast station or a broadcast satellite and corresponding to the date, the day of the week, time and channel and the like instructed by the control unit 3 so as to transmit it to the information reading unit 2 as broadcast information.

[0296] FIGS. 28A to 28C are diagrams showing the format of record for use in the information reproducing apparatus according to the fourth embodiment of the present invention.

[0297] The format of record of information on the information recording medium 1 is, as shown in FIG. 28A, composed of data units each having a predetermined length. The data unit is one reading unit. Each data unit is classified into three types, as shown in FIG. 28B.

[0298] That is, the data unit has a data unit having main information stored therein, a data unit having sub-information stored therein and a data unit having information (information of received program) required to receive a broadcast program.

[0299] Each data unit is composed of a control code storage section for storing a control code for distinguishing main information, sub-information and information of a program to be received from each other and an information storage section for storing main information data, sub-information data and information of the program to be received to have a predetermined length.

[0300] Information of received program includes one or more information (ID of a program) of broadcast information which must be reproduced.

[0301] In this case, an assumption is performed that the receiving unit 20 has been tuned to, for example, a predetermined commercial only broadcast. Broadcast information which is received and obtained as a broadcast signal includes the ID of a program, as shown in FIG. 28C.

[0302] The sub-information code or sub-information may include a broadcast information reference code for instructing reproduction of broadcast information and the program ID of broadcast information which must be reproduced.

[0303] FIG. 29 shows the information reading unit 2. The same elements as those shown in FIG. 20 are given the same reference numerals, and different elements will now be described. That is, an information selecting section 2fis substituted for the information combining section 2e; and a broadcast information input section 2gis substituted for the network information input section 2d.

[0304] The broadcast information input section 2greceives, from the receiving unit 20, broadcast information received by the receiving unit 20, and then subjects it to a predetermined information process. Then, the broadcast information input section 2gtransfers broadcast information to the information selecting section 2f.

[0305] The information selecting section 2fis controlled by the control unit 3 to select either broadcast information supplied to the broadcast information input section 2gor information read from the disk 1 by the disk input section 2a.

[0306] FIG. 30 shows the control unit 3 which has a structure similar to that shown in FIG. 4 except for the control signal generated by the control signal generating section 3bbeing output to the receiving unit 20 as well as to the information reading unit 2.

[0307] FIG. 31 shows the receiving unit 20 which comprises a control signal input section 20a, a receiving section 20band a program selecting section 20c.

[0308] The control signal input section 20areceives a control instruction signal (control information) from the control unit 3, and then transfers it to the receiving section 20band the program selecting section 20c.

[0309] The receiving section 20bhas been tuned to a predetermined commercial only broadcast. The receiving section 20breceives a receipt start instruction signal transferred from the control unit 3 through the control signal input section 20a, and then receives a broadcast signal. Then, the receiving section 20btransfers broadcast information to the program selecting section 20c.

[0310] The program selecting section 20cselects broadcast information transferred from the receiving section 20bin accordance with information about the received program transferred from the control unit 3 through the control signal input section 20a, and then outputs selected broadcast information to the information reading unit 2.

[0311] The program selecting section 20cmay be arranged to store the program ID included in information of the program to be received as a list of selectable programs to select broadcast information.

[0312] An assumption is performed that one of ID stored in a program selection list is “01003***”. At this time, broadcast information having program ID “01003211” and received by the receiving section 20bis output to the information reading unit 2.

[0313] Referring to a flow chart shown in FIGS. 32 to 34, the operation of the information reproducing apparatus shown in FIG. 27 will now be described.

[0314] When a user loads the disk 1 into a predetermined position in the information reading unit 2, the disk input section 2areads a data unit from the disk 1 (step S160).

[0315] When the control code included in the data unit read by the disk input section 2ahas been transferred to the control information output section 2b(step S161), the control information output section 2boutputs the control code to the control unit 3 (step S162).

[0316] The operation determining section 3aof the control unit 3 receives the control code (step S163). If the control code is a code for receiving a program (step S164), the operation proceeds to step S165 so that the operation determining section 3aoutputs information of a program which is included in the data unit through the control signal generating section 3b(steps S165 and S166).

[0317] When the control signal input section 20aof the receiving unit 20 receives program information, the control signal input section 20afurther transfers the program information to the program selecting section 20c(steps S167 and S168 shown in FIG. 33).

[0318] The program selecting section 20cstores the ID of the program included in the program information as a list of selectable programs (step S169).

[0319] Then, a signal instructing start of receiving broadcast is supplied from the control unit 3 to the receiving section 20bthrough the control signal input section 20aat an adequate timing so that receipt of the broadcast signal is started (step S170).

[0320] Whenever broadcast information is transferred from the receiving section 20b, the program selecting section 20cchecks whether or not program ID is included in the list of the selectable programs (steps S171 to S172).

[0321] Only broadcast information having the program ID included in the list of the selectable programs is selected by the program selecting section 20c, and then output to the information reading unit 2. Then, selected broadcast information is received by the broadcast information input section 2g(steps S173 and S174).

[0322] If the control code is a main information code or a sub-information code in step S164 shown in FIG. 32, the operation proceeds to step S180 shown in FIG. 34.

[0323] When the control code is the sub-information code, the skip flag stored in the skip flag storage section 3cis turned on (FALSE). That is, the fast forward movement operation is inhibited (step S180a).

[0324] When the control code is the main information code, the operation proceeds to step S117 so that the skip flag stored in the skip flag storage section 3cis reset (TRUE). That is, the fast forward movement operation is permitted (step S180b).

[0325] If the control code is the sub-information code, whether or not broadcast information reference code is included in sub-information is checked (step S181).

[0326] If broadcast information reference code is included, the operation determining section 3aoutputs the program ID included in, for example, sub-information to the information reading unit 2 through the control signal generating section 3btogether with the signal for instructing reproduction of broadcast information (steps S182 and S183).

[0327] If the control code is the sub-information code which does not include the sub-information code and broadcast information reference code, the operation determining section 3aoutputs a reproduction instruction signal (a disk reproduction instruction signal) of information recorded on the disk 1 to the information reading unit 2 through the control signal generating section 3b(steps S184 and S185).

[0328] When the information selecting section 2freceives broadcast information reproduction instruction signal or disk reproduction instruction signal through the control information input section 2cof the information reading unit 2 (steps S186 and S187), the information selecting section 2fselects information from either the broadcast information input section 2gor the disk input section 2ain response to the reproduction instruction signal (step S188), and then outputs the selected information to the reproducing unit 4 (step S189).

[0329] Another structure of the receiving unit 20 will now be described with reference to FIG. 35. FIG. 35 shows a structure in which a program reservation section 20dis substituted for the program selecting section 20cin the structure shown in FIG. 31.

[0330] In this case, program information includes the following information items so that one program ID is made to correspond to one broadcast program (for example, a commercial) which is periodically broadcast every week.

[0331] (program ID, (channel, a day of the week, start time:end time), (channel, a day of the week, start time:end time), . . . ).

[0332] The program reservation section 20dreceives the above-mentioned program information from the information reading unit 2 through the control unit 3 so as to store it as a list of reserved programs. In accordance with the contents of the list, the broadcast signal of the instructed program is received so as to be transferred to the broadcast information input section 2gof the information reading unit 2.

[0333] The broadcast information input section 2gstores broadcast information transferred from the receiving unit 20.

[0334] Referring to a flow chart shown in FIG. 36, the operation of the receiving apparatus having the structure shown in FIG. 35 will now be described.

[0335] When program information, which has been, in step S166 shown in FIG. 32, output from the control signal generating section 3bto the receiving unit 20 is received by the control signal input section 20aof the receiving unit 20 (step S195), it is further transferred to the program reservation section 20d(step S196). The contents are stored in the list of reserved programs (step S197).

[0336] Then, the receiving unit 20 instructs the receiving section 20bto receive all of programs reserved with the program information or to interrupt receiving of the program in accordance with the reserved time and/or the channel stored in the list of the reserved programs.

[0337] The receiving section 20breceives the instructed broadcast signal until it receives an instruction to interrupt receipt from the program reservation section 20d, and then outputs the broadcast signal to the information reading unit 2 (steps S198 to S201).

[0338] The broadcast information input section 2gof the information reading unit 2 is arranged to store broadcast information transferred from the receiving unit 20 (step S202). The following operation is similar to that in steps S160 to S164 (see FIG. 32) and steps S180 to S189 (see FIG. 34).

[0339] As described above, the sub-information code sometimes includes the broadcast information reference code. It can be interpreted as an instruction to select a program having the ID from the broadcast information input section 2gand to reproduce the program.

[0340] If the sub-information code includes the broadcast information reference code and sub-information has the instructed program ID, broadcast information corresponding to the ID must already be received and stored in the broadcast information input section 2g.

[0341] Therefore, an assumption is performed that each broadcast information is repeatedly broadcast at sufficiently short intervals. To make this to be further reliable, a reference may be made to a commercial having a long broadcast period after the disk reproduction time has elapsed.

[0342] If broadcast information having the ID is not stored in the broadcast information input section 2g, a commercial on the disk which is reproduced as an alternative to it may be instructed as sub-information data.

[0343] The operation which is performed by the information reproducing apparatus shown in FIG. 27 when the user instructs “fast forward movement of the disk” through the GUI 5 is similar to the flow chart shown in FIG. 7.

[0344] As described above, according to the fourth embodiment, the control code included in the data unit on the disk 1 is checked by the operation determining section 3aof the control unit 3.

[0345] The control unit 3 instructs the information reading unit 2 to reproduce information (main information or sub-information) on the disk 1 or to reproduce broadcast information received by the receiving unit 20 in accordance with the type of the control code.

[0346] As a result, important sub-information (for example, a commercial) for supplementing main information or important sub-information relating the sponsor can reliably be presented to a user. Moreover, a commercial (sub-information) including up-to-date can easily be displayed during reproduction of the disk 1.

[0347] As described above, according to the present invention, important sub-information for supplementing main information or important information relating to a sponsor can reliably be presented to a user during reproduction of main information, such as a movie recorded on an information recording medium. Therefore, the cost of the information recording medium, such as the DVD, can be reduced.

[0348] The above-mentioned contrivance described in each of the embodiments may be, as a program which can be executed by a computer, written on, for example, a magnetic disk (a floppy disk or a hard disk) or an optical disk (a CD-ROM or a DVD) or a semiconductor memory so as to be applied to various apparatuses. As an alternative to this, it may be transferred through a communication medium so as to be applied to various apparatuses.

[0349] In this case, the information reproducing apparatus according to this embodiment reads the program recorded on the recording medium and the operation of the information reproducing apparatus is controlled so that the above-mentioned process is realized.

[0350] Although the information reproducing apparatus has been described in each of the embodiments, the structures which can be understood in each embodiment may, of course, be combined with each other.

[0351] Additional advantages and modifications will readily occurs to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.