US 4,745,549 AGrant

Method of and Apparatus for Optimal Scheduling of Television Programming to Maximize Customer Satisfaction

Issue Date:1988-05-17

•3 Claims

•12 Drawing Sheets

Abstract

In a method and apparatus for extracting programs suitable for individual subscriber taste from among all available television programs and for editing an individual subscriber television program list, objective data is statistically processed by linear programming. The processed results are input to a computer and are stored on a hard disk. The storage contents are read out from the hard disk and are printed out. Subscriber complaints about the program list are periodically fed back to improve prediction precision, thereby providing an automatic controller attuned to subscriber taste when the individual subscriber program list is used to automatically control a TV or VTR.

Metadata

Assignee

Hashimoto Corporation

Inventor

Kazuo Hashimoto

Application Information

Application Number:US 8715491

Filing Date:1986-06-06

Priority Date:1985-06-11

Art Unit:236

Classifications

IPC:

G06F 1546H04N 702H04N 710

Field of Search:

36435817940284;862 AS

Patent Drawings (12 sheets)

Description

Background of the Invention

1. Field of the Invention

The present invention relates to editing of an individual television program according to linear programming, a method of automatically controlling a program rating, and an apparatus therefor.

2. Description of the Prior Art

In order to implement such an apparatus according to conventional techniques, a program editor selects suitable programs reflecting a customer's taste from among all available television programs by utilizing subjective knowledge according to the results of questionnaires filled by end users (customers). In this case, the programs are selected on at least a once-per-week basis. The programs are listed and printed out in a tape-like table (to be referred to as a table hereinafter) according to the channel numbers and time intervals. The TV or VTR is then automatically set according to this table. Japanese Patent Publication Nos. 41-8542, 42-1882, 53-40340, and 59-21114 issued to the present applicant are concerned with the above conventional system.

Summary of the Invention

It is an object of the present invention to edit an individual television program list which is formed on the basis of objective decision and which satisfies a customer.

It is another object of the present invention to provide a method and apparatus for editing individual television program lists in a short period of time, even if many customers simultaneously order the lists.

It is still another object of the present invention to eliminate subjective opinions of an editor when he selects programs suitable for the tastes of customers from among all available television programs.

It is still another object of the present invention to provide a method employing linear programming for questionnaires and program evaluation and adopting a technique for feeding back complaints against the evaluation results, thereby improving satisfaction of the customers in the individual television programs listed by the editor.

It is still another object of the present invention to edit a control tape for controlling an automatic controller incorporated in a TV or VTR according to the program list.

In order to achieve the above objects of the present invention, the present invention is constituted by a method comprising the steps of: statistically processing objective data according to linear programming; inputting processed results in a computer, storing them on a hard disk, and printing out the contents therein; and periodically feeding back complaints to be compared against the processing results to improve reliability of the data. The preferred embodiment also includes editing of a control tape. The functional system diagram is shown in FIG. 2.

Brief Description of the Drawings

FIG. 1 is a block diagram of a conventional system;

FIG. 2 is a block diagram of a system according to the present invention;

FIG. 3 is a diagram showing a computer program according to the present invention;

FIG. 4 is a table showing the relationship between time intervals, days, and television channel numbers according to the results of questionnaires;

FIGS. 5A and 5B are a flow chart for processing questionnaire information (subscriber data registration);

FIG. 6 is a flow chart of television program evaluations;

FIG. 7 is a flow chart for editing television programs according to linear programming;

FIG. 8 is a table showing an output of a television program table;

FIGS. 9A and 9B are a flow chart for processing a complaint; and

FIG. 10 is a diagram of components associated with a computer according to the present invention.

Detailed Description of the Preferred Embodiment

The present invention is constituted by a means for evaluating questionnaires collected from end users, a means for evaluating all available television programs, a means for calculating the evaluation results according to linear programming and editing data (a television program list for time intervals and channel numbers in a form suitable for each customer), a means for inputting the data in a computer and causing the computer to calculate the data, a means for temporarily storing an output from the computer, a means for printing out each individual television program list (to be referred to as a program list hereinafter) according to the storage contents, a means for feeding back complains against the first printed-out program list, and a means for automatically controlling a TV or VTR according to the program list. The constitution of the present invention described above is expressed as a program diagram in FIG. 3.

Although hardware associated with the above operations is added to constitute the entire system, a control tape is finally edited to control an automatic controller incorporated in a TV or VTR. This is known in conventional systems to those skilled in the art, and since it is not directly associated with the present invention, a detailed description thereof will be omitted. The structures and operations of the means described above will be described below:

(1) Subscriber Questionnaire Result Input Means

FIG. 4 shows one form of questionnaire used as a questionnaire result input means for extracting and representing individual tastes. Referring to FIG. 1, the leftmost column represents days of the week, and the uppermost row represents time intervals (in units of 15 minutes). Television channel Nos. are respectively filled at intersections of corresponding rows and columns. A basic questionnaire for editing the list described above is exemplified below:

In the above questionnaire, five selection items are provided for each of 20 questions, so that a total of 20.times.5=100 items are provided. The 20 questions include questions on family members, age groups, time intervals in which customers do not watch television, and favorite dramas, as well as questions for determining whether the customers prefer NHK programs and news programs, and which program is the most interesting. Each question has five possible selection items. The items for linear programming (to be described later) are assigned with numbers as follows. The first question is assigned with P(1) to P(5); the second question with P(6) to P(10); the third question with P(11) to P(15); . . . ; and the twentieth question with P(96) to P(100). The flow chart of the subscriber data registration/retrieval (correction) is shown in FIG. 5.

(2) TV Program Evaluation Means

A TV program evaluation means has the same form as that of the questionnaire described in (1) Subscriber Questionnaire Result Input Means, and is associated with the contents of questions asked of the subscribers for respective TV programs.

The data registration for TV programs is given in the flow chart of FIG. 6.

(3) Linear Programming Means

The basic algorithm for linear-programming the evaluations in the above (1) and (2) will be described. The system of the present invention is based on the following algorithm: ##EQU1## where Pl(i): the degree of interest of one subscriber for the ith program (the degree is represented by a numeral; the degree given by numeral "0" represents no interest).

i: the ith program when the 21 hours from 5 a.m. to 2 a.m. are divided into 15-minute intervals.

P(j): representing that the subscriber circles the jth items in the questionnaire. If the subscriber circles item 3 in question 3, P(11)=P(12)=P(14)=P(15)=0 and P(13)=1.

n: 20 questions.times.5 selection items=100

T(i,j): representing that the jth item of the ith TV program is circled. i and j are given by 1 or 0.

Pc(j): an unknown coefficient for 0.ltoreq.Pc(j) (having nothing to do with the subscribers)

Equation (1) is a mathematical expression for evaluating a degree of commonness between the subscriber preferences and the TV programs. Coefficient Pc(j) is commonly given for all subscribers. The value of Pc(j) is accurately determined by the feedback of complaints from the subscribers.

In order to evaluate commonness between the subscriber preferences and the TV programs, linear programming is represented by an equation of the first degree. The coefficient Pc(j) is a common value for all subscribers. The value of Pc(j) is accurately calculated by feeding back (i.e., learning) complaints from the subscribers, and a detail description thereof will be made later.

(4) Data Storage Means and Printout Means

A data storage means according to the present invention is exemplified by a hard disk. Data input to the hard disk is immediately printed out, as shown in the flow chart of FIG. 7. If data for several thousands of subscribers is stored in the hard disk and code numbers are respectively assigned to the individual subscribers, an optical program table for each subscriber can be printed out, as shown in FIG. 8. According to a test, it took about 20 minutes to print out each program table after evaluation of the questionnaire if program language FORTRAN was used. The term "print out" does not mean that the program table is finally presented to the corresponding subscriber but that the table is confirmed in processing. The printed program table must be tested. By collecting complaints and feeding them back, a more complete program table can be prepared.

(5) Complaint Processing

As described last in the basic algorithm for the above data processing, the value of Pc(j) is accurately calculated by collecting complaints from the subscribers. An example of complaint reception is given as follows:

Calculation results are given for a given subscriber: ##EQU2## where TBS and NHK are Japanese TV broadcasting stations. A proposal for programming station TBS for Tuesday 19:30 is made. Assume that the given subscriber presents a complaint to this proposal in the following manner. ##EQU3## In this case, a difference between the degree of interest for Pl(i2) and that for Pl(i1) is represented by Yi. In other words, this is associated with an evaluation of the degree of importance of the complaint. At present, Yi=-1. In this case,

Substitution of equation (1) into the above inequality yields the following inequality: ##EQU4## Assuming that ##EQU5## the above inequality can be rewritten as: ##EQU6## The left-hand side is then substituted by Vi, so that: ##EQU7## Xj is determined to minimize Vi. Assuming only a sum V of positive values Vi (programs causing complaints), ##EQU8## where m is the total number of Vi components for Vi>0, as many as complaints possible must be received. A minimum V is then calculated to determine the accurate Xj. The above operation is given by the flow chart in FIG. 9.

Referring to FIG. 9, "Search Record" in Processing=1 means search of data for one subscriber. "Input Items Excluding Keyword" indicates the selection items excluding the subscriber name read in katakana characters and the date of birth. "New Input" indicates a new subscriber to be registered. However, if the corresponding record is found, i.e., YES, the correct input is entered to update the corresponding value. The flow then advances by selecting an alternative step. In short, in complaint processing, a series of steps from "Initialize Linear Programming" to "Find Countermeasures" are important in Processing=2. More specifically, linear programming initialization is a recalculation of Pc(j). The countermeasures indicate that a Pc(j) value different from the current value is calculated and updates the current value. These mathematical steps are the center of complaint processing, i.e., the learning function. The coefficient Pc(j) can be more accurate to improve prediction precision. Therefore, more suitable programs can be provided to the subscribers.

The overall system is shown in FIG. 10; identification of components is in Appendix I. The steps in the program can be represented by Appendix II.

The embodiment described above exemplifies TV program ratings. However, the method and apparatus of the present invention is not limited to such a particular application. Evaluations can be made according to questionnaires similar to that in the above embodiment. The results are linear-programmed to collect the individual complaints and then to feed them back for processing, thereby further improving prediction precision. In this manner, the present invention can also be applied to surveys other than the embodiment described in this specification. ##SPC1##

Claims

What is claimed is:

1. An apparatus for providing an individual television program table wherein television channels and corresponding time intervals are listed for each individual, comprising; record reading means for reading subscriber taste data obtained from a questionnaire and in response developing subscriber taste data signals; means for evaluating television programs in accordance with predetermined criteria to obtain program evaluation data; linear programming means responsive to said subscriber taste data signals and said program evaluation data for generating optimal program list data; printer means for printing from said optimal program list data a program list on a recording medium; feedback means for inputting complaints on the program list from a subscriber and, in response, modifying said program evaluation data to improve prediction reliability of a subsequent program list to be printed by said printer; and setting means for setting a television or video cassette recorder in accordance with the program list.

2. In a device for printing out an individual television program table, said table comprising a list in units of time intervals and channel numbers in a form optimal for each subscriber by selecting optimal programs from among all available television programs, a method of editing the program table, comprising the steps of; evaluating questionnaires showing subscriber taste in television programs to obtain taste evaluation questionnaires; evaluating television programs to obtain television program evaluations; applying a linear program to the subscriber taste evaluations and television program evaluations to obtain optimal individual subscriber program data; storing the optimal individual subscriber program data; printing out the stored optimal individual subscriber program data in the form of an individual subscriber program list; receiving complaints from a subscriber when the subscriber makes complaints on the printed program list; feeding back the complaints to be included in the linear program to increase prediction reliability of a subsequent program list; and reading the program list to automatically set a television set or video tape recorder.

3. In a device for printing out an individual television program table, said table comprising a list in units of time intervals and channel numbers in a form optimal for each subscriber by selecting optimal programs from among all available television programs, a method of editing the program table, comprising the steps of; evaluating questionnaires showing subscriber taste in television programs to obtain taste evaluation questionnaires; evaluating television programs to obtain television program evaluations; applying a linear program to the subscriber taste evaluations and television program evaluations to obtain optimal individual subscriber program data; storing the optimal individual subscriber program data; printing out the stored optimal individual subscriber program data in the form of an individual subscriber program list; receiving complaints from a subscriber when the subscriber makes complaints on the printed program list; feeding back the complaints to be included in the linear program to increase prediction reliability of a subsequent program list; and editing the printed individual subscriber program list to control a program rating of a television set or a video tape recorder.

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