JP4950851B2 - Recorded program information display device - Google Patents

Description

  The present invention predicts a user's viewing program according to the user's usage time, the degree of interest in the program, the viewing style, or a combination thereof from all the recorded programs of the device. The present invention relates to a recorded program information display device that changes the display order of recorded programs based on the program.

Conventionally, recorded contents are often displayed side by side in order of recording time on a recording / playback device. In recent years, there has been proposed a recording / playback apparatus capable of continuously playing back recorded programs having continuity while maintaining their order relationship (see, for example, Patent Document 1).
JP 2006-202428 A

  A viewing style that allows users to record broadcast programs that they are interested in at a later date and view the recorded programs at a convenient time later has begun to spread. Since a large amount of broadcast content has been accumulated in the device, it has become difficult to search for a program that the user wants to view at that time.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a recorded program information display device that reduces the time and effort for accessing a recorded program.

  In order to solve the above-described problems, a recorded program information display device of the present invention stores first storage means for storing a plurality of recorded programs and program guide information corresponding to the plurality of programs. A second storage means; a creation means for creating operation history information for an operation performed by a user; an extraction means for extracting viewing history information relating to a program viewed by a user from the operation history information; and for each program In addition, the program is a viewing erasure program that is viewed by the user and erased from the first storage means using the program guide information and the viewing history information, or is a saved program that is not erased from the first storage means. A determination unit that determines a viewing style indicating whether or not, a specifying unit that uses the viewing history information to identify a viewing time zone that is most often viewed by a user for each program, For each program, Storage means for acquiring usage time zone information indicating whether or not a viewing time zone matches a certain time zone, and storing structure definition data of a prediction model for estimating whether the user is interested in the program And the third storage means, and for each program, the use time zone information, the viewing style, and the program guide information are applied to the prediction model, and the viewing is performed on the condition that the user is interested in the program. A first calculation means for calculating a conditional probability that is the presence or absence of any one of the styles, and a second calculation for calculating a user's viewing probability value by applying the conditional probability to the prediction model for each program And a presenting means for presenting a program having a higher viewing probability value at a position that is more easily understood by the user.

  According to the recorded program information display apparatus of the present invention, since the user can quickly find a desired recorded program, it is possible to reduce labor and time for accessing the recorded program.

Hereinafter, a recorded program information display apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that, in the following embodiments, the same numbered portions are assumed to perform the same operation, and repeated description is omitted.
First, an outline of the present embodiment will be described.
The recorded program information display apparatus according to the present embodiment predicts a viewing program from all recorded programs stored in the device according to the user's usage time, the degree of interest in the series program, and the viewing style. To change the display order of the recorded programs. Here, a series program refers to one program of a certain time (usually a certain day) or a plurality of times (usually a plurality of times) in which similar contents are continuously divided into a plurality of times (usually a plurality of days). Multiple days). Examples of the series program include a series drama, a series documentary, and a news or information program broadcast every day in the same time zone. The usage time zone of the user means whether or not the specified time matches the viewing time zone of the user's recorded program. The viewing style is a result of determining from the operation history information for the program whether the program is to be erased immediately when the user sees it or whether it is an archive program to be left in the device. The recorded program information display apparatus according to the present embodiment estimates the presence / absence of the user's interest in the series program by learning the viewing prediction model from these pieces of information, and calculates the viewing prediction probability using the obtained viewing prediction model. The display order of the recorded program is changed accordingly.
As a result, information on recorded programs that have not yet lost interest in recorded programs and series programs that are frequently used during the time when the user accesses the device is displayed at a position that is easy to operate the device.

  In the embodiment, the method for changing the display order of the recorded program guide information recorded / accumulated in the broadcast program recording / playback apparatus is described. However, the target information is not limited to this, and a wide range of images, music, etc. In this embodiment, the target is a broadcast program recording / playback apparatus, but the target apparatus is not limited to this, and the entire video content is stored and broadcasted widely. It is possible to target equipment.

  Further, the recorded program information display device of the present embodiment is applied to changing the display order of recorded broadcast contents according to the user's situation when displaying a list of recorded broadcast contents on a recording / playback device.

The recorded program information display apparatus of this embodiment will be described with reference to FIG.
The recorded program information display device 100 of this embodiment includes a recorded program receiving unit 101, an electronic program guide information receiving unit 102, a recorded program management unit 103, a recorded program data unit 104, a viewing history data unit 105, a viewing history management unit 106, Operation history data section 107, operation history management section 108, viewing style determination section 109, recording reservation cancellation determination section 110, prediction model learning section 111, viewing probability calculation section 112, epg data management section 113, epg data section 114, recorded program A display unit 115, a recorded program reservation unit 116, a recording reservation data unit 117, a viewing time zone specifying unit 118, and a usage time zone determination unit 119 are included. The recorded program information display apparatus 100 can receive, record, and play back broadcast program content (hereinafter also simply referred to as a program).

The recorded program reservation unit 116 receives recorded program reservation information as a recording reservation instruction from the user as input information, and stores this recorded program reservation information in the recording reservation data unit 117. This recording reservation instruction is obtained from the user through, for example, a remote controller or an operation button on the device. The recorded program reservation unit 116 refers to the time information from the recorded program reservation information stored in the recording reservation data unit 117 and extracts the recorded program reservation information corresponding to the program to be recorded at the current time. The recorded program reservation information is output to the recorded program management unit 103.
The recording reservation data section 117 stores recorded program reservation information. The recording reservation data section 117 normally stores reservation information for a plurality of programs to be broadcast in the future.

The electronic program guide information receiving unit 102 receives electronic program guide (epg) information from a broadcast server device or the like. The electronic program guide information (hereinafter referred to as epg information) is, for example, as shown in FIG. The epg information includes, for example, series program ID, program ID, broadcast date, broadcast station, genre, title, and performer.
In response to a recording reservation instruction from the recorded program reservation unit 116, the recorded program management unit 103 refers to the electronic program guide information reception unit 102 and generates a recording execution instruction to execute recording to the recorded program reception unit 101. This instruction is output to the recorded program receiving unit 101. Thereafter, the recorded program receiving unit 101 acquires the recorded program and stores the recorded program in the recorded program data unit 104. The recorded program management unit 103 stores recorded program guide information related to the recorded program. The recorded program management unit 103 manages data such as periodic updates.
The recorded program receiving unit 101 receives a program from a broadcast server device or the like. The recorded program receiving unit 101 receives and records the corresponding program in response to a recording execution instruction input from the recorded program management unit 103 from the user.
The recorded program data unit 104 stores the recorded program data acquired by the recorded program management unit 103.

The epg data management unit 113 acquires epg information from the electronic program guide information receiving unit 102 and stores this information in the epg data unit 114. The epg data management unit 113 manages data such as periodic updates.
The epg data unit 114 stores the epg information acquired by the epg data management unit 113.

The operation history management unit 108 collects, stores, and manages operation information performed on the recorded program information display device 100 by the user. The operation history management unit 108 acquires operation information, generates the operation history information with time information added to this information, and stores the operation information in the operation history data unit 107. The operation information is information operated by the user using, for example, a remote control device or a broadcast channel switch. The operation history information is information as shown in FIG. 3, for example, and includes device operation history information and a device operation list. The device operation history information includes device operation date / time, start time, end time, operation target program ID, and operation ID. The device operation list includes a device operation ID and the content of the device operation. Since the device operation history information and the device operation list have the device operation ID as a main key attribute, it is possible to specify the operation content for the program by referring to the device operation history information and the device operation list. The operation history management unit 108 manages data such as periodic updates.
The operation history data unit 107 stores the operation history information acquired by the operation history management unit 108. The operation history information is not limited to the contents shown in FIG. 3 and may be information having various formats and definitions, such as keyboard input, remote control input, online input via a network, reading from a magnetic tape as a medium for information transmission, etc. It shall be input in the form of

The viewing history management unit 106 extracts viewing history information related to the viewing of the program by the user from the operation history information stored in the operation history data unit 107 via the operation history management unit 108. It is stored in the viewing history data unit 105. The viewing history management unit 106 manages data such as periodic updates.
The viewing history data unit 105 stores the viewing history information extracted by the viewing history management unit 106. The viewing history information is information corresponding to the operation content “reproduced” in FIG. 3, for example, operation history information whose “operation ID” is 2 in FIG. 3.

The viewing time zone specifying unit 118 acquires the viewing history information from the viewing history management unit 106 and specifies the viewing time zone for each program included in this information. As the viewing time zone, a time zone that is viewed most frequently from a plurality of viewing time zones is selected and assigned. The types of viewing time zones are, for example, morning (5-10 o'clock), noon (10-14 o'clock), evening (14-18 o'clock), night (18-22 o'clock), and midnight (22-4 o'clock). It is done. These types may be assigned to other numbers of time zones according to other time segments. For example, as shown in FIG. 4, a program with a program ID of 200 is viewed on May 3, 5, and 6 at 2 o'clock, 12 o'clock, and 15-16 o'clock respectively for 2 minutes, 21 minutes, and 61 minutes, respectively. Yes. Assuming that the most watched time zone is allocated, since the viewer watched 61 minutes in the 15-16 era, the watch time zone of the program whose program ID is 200 is identified as evening. In addition to the method of specifying the most watched time zone as the viewing time zone as described above, other methods such as specifying the time zone with the highest viewing frequency may be used.
The usage time zone determination unit 119 acquires information on the viewing time zone for each program specified by the viewing time zone specification unit 118, determines whether the specified time matches the viewing time zone of the recorded program, and specifies Use time zone information is created as information indicating whether or not the viewing time zone of each program matches. The time may be specified by inputting an arbitrary time using an input device such as a user or a keyboard, or the system may give an arbitrary time. If the prediction model is learned every time the user accesses the device, the real-time time is set as the specified time. For example, when the designated time is “daytime” and the viewing time zone of a recorded program is also “daytime”, the usage time zone determination unit 119 determines that the user device access time zone is the viewing time zone of the recorded program. Since they match, it is determined that the recorded program is in the usage time zone of the user. For example, information as shown in FIG. 5 is created. From FIG. 5, when the device access time zone (designated time) is morning, the value of the usage time zone is “Yes” only for programs whose viewing time zone is morning as shown in the upper diagram of FIG. When the device access time zone (designated time) is night, the value of the usage time zone is “Yes” only for a program whose viewing time zone is night as shown in the lower diagram of FIG.

  The viewing style determination unit 109 acquires viewing history information from the viewing history management unit 106, acquires epg information of a recorded program corresponding to the viewing history information from the epg data management unit 113, and determines the viewing style of the program To do. The viewing style indicates whether the program is a program that is immediately erased by the user (a program of “deletion determination”) or an archive program that remains in the device (a program of “archive determination”). Details of the viewing style determination unit 109 will be described later with reference to FIG. An example of the output of the viewing style determination unit 109 is, for example, FIG. That is, the viewing style determination unit 109 outputs, for each program, information indicating whether the program is a “watch and erase determination” program or an “archive determination” program.

  The recording reservation cancel determination unit 110 refers to the operation history information to determine whether the user has reserved recording of a program or canceled the program reservation (“delete program”). For example, the recording reservation cancellation determination unit 110 determines that a recording reservation is made for a program whose “operation ID” in FIG. 3 indicating operation history information is 7 and a program whose “operation ID” is 6 in FIG. It is determined that the reservation has been canceled.

  The prediction model learning unit 111 acquires recorded program guide information for a certain past period from the recorded program management unit 103, acquires usage time zone information for each program from the usage time zone determination unit 119, and from the viewing style determination unit 109. The viewing style for each program is acquired, and information indicating whether the recording reservation of the program included in the recorded program guide information is not canceled but remains as a reservation from the recording reservation cancellation determination unit 110 is acquired. The prediction model learning unit 111 reads structure definition data that defines the structure of a prediction model stored in advance. The structure definition data is stored in a memory (not shown). This memory may be included in the prediction model learning unit 111. The prediction model learning unit 111 calculates the conditional probability value of each random variable in the Bayesian network from the input information based on the structure definition data, and the conditional probability value between the structural information of the prediction model and each calculated random variable. And generate Details of the prediction model learning unit 111 will be described later with reference to FIG. The structure definition data and the conditional probability value of each random variable will be described later with reference to FIGS. An example of the output of the prediction model learning unit 111 is, for example, FIG.

  The viewing probability calculation unit 112 acquires the structural information of the prediction model read by the prediction model learning unit 111 and the conditional probability value between the calculated random variables generated by the prediction model learning unit 111, and the prediction model The viewing probability value of the recorded program is calculated by probability inference using. This calculates the user's predicted viewing probability for a certain recorded program. Details of the viewing probability calculation unit 112 will be described later in step S808 of FIG.

  The recorded program display unit 115 refers to the viewing probability value for each program obtained by the viewing probability calculation unit 112, and the program stored in the recorded program data unit 104 is easier for the user to understand as the program has a higher viewing probability value. Present in position. For example, the recorded program display unit 115 rearranges the programs in descending order of viewing probability values and presents them to the user. The recorded program display unit 115 displays the rearranged programs on a monitor, for example. A display example of the recorded program display unit 115 will be described later with reference to FIG. 11 in step S809 of FIG. The recorded program display unit 115 presents the recorded program guide information to the user based on the epg information obtained from the epg data management unit 113 and the program guide information of the recorded program data unit 104.

Next, FIG. 8 shows an example of a series of operations of the viewing style determination unit 109, the viewing time zone identification unit 118, the usage time zone determination unit 119, the prediction model learning unit 111, the viewing probability calculation unit 112, and the recorded program display unit 115. The description will be given with reference.
The viewing style determination unit 109 reads the viewing history information (see “playback” in FIG. 3) from the viewing history management unit 106 as input information (step S801). The viewing style determination unit 109 reads the viewing history information from the viewing history management unit 106 and the epg information (see FIG. 2) of the recorded program from the epg data management unit 113 as input information (steps S801 and S802). The viewing style determination unit 109 selects one recorded program from the read recorded program guide information (step S803).

  The viewing style determination unit 109 determines the viewing style (see FIG. 6) of the program selected in step S803 (step S804). Details of step S804 will be described later with reference to FIG.

Identify the main time of day when the user views the program. The viewing time zone identification unit 118 identifies the viewing time zone (see FIG. 4) of the recorded program selected in step S803 from the viewing history information read in step S801 (step S805).
The above steps S803 to S805 are performed for all recorded programs.

  The usage time zone determination unit 119 determines whether or not the specified time matches the viewing time zone of the recorded program, and creates usage time zone information (see FIG. 5) indicating whether or not it is the usage time zone (see FIG. 5). Step S806). In the usage time zone determination unit 119, if the prediction model is learned each time the user accesses the device, the real-time time is set as the designated time. The use time zone determination unit 119 compares the specified time obtained in this way with the viewing time zone of the program specified by the viewing time zone specifying unit 118, and the specified time matches the viewing time zone of each program. Use time zone information is created as information indicating whether or not to do so.

The prediction model learning unit 111 learns the prediction model (step S807). Details of step S807 will be described later with reference to FIG.
The viewing probability calculation unit 112 reads the prediction model created by the prediction model learning unit 111, and calculates the viewing probability value of the recorded program (step S808). Specifically, for example, the conditional information between the prediction model structure information and the calculated random variables as shown in FIG. 9 is read. FIG. 9 is an example of a description of the viewing prediction model shown in FIG. The prediction model is not limited to this, and is information having various formats and definitions, and is input in the form of keyboard input, remote control input, online input via a network, reading from magnetic tape as a medium for information transmission, and the like. . The viewing probability calculation unit 112 calculates the viewing probability value of the recorded program by probability inference using the prediction model. This calculates the user's predicted viewing probability for a certain recorded program. For example, in the usage time zone determination unit 119, if the time when the user uses the device (specified time) is noon and the viewing time zone of a certain recorded program is “daytime”, the user time zone is the time of the recorded program. It matches the viewing time zone. Therefore, the recorded program is the user's usage time zone (usage time zone = Yes), the user is interested in the series program (interest in the series = TRUE), and the recorded program is erased. If the program is a viewing program (viewing viewing = Yes), the probability Pr of viewing the recorded program by the user (viewing = TRUE | usage time = Yes, series interest = TRUE, viewing viewing = Yes) calculate.

  Likelihood weighting (like Fung, R. and Chang, KC, "Weighting and integrating evidence for stochastic simulation in Bayesian networks", In Proc. Of Conf. UAI-89, (1989).) And loopy belief propagation (eg KP Murphy, Y. Weiss and MI Jordan: "Loopy Belief Propagation for Approximate Inference: An Empirical Study", In Proc. Of Conf. UAI-99, (1999). Can be obtained by applying it to the prediction model. In this way, viewing probability values for all recorded programs are obtained. The viewing probability calculation unit 112 obtains data as shown in FIG. 10, for example.

  The recorded program display unit 115 sorts the recorded programs in the recorded program data unit 104 in descending order according to the viewing probability values obtained for all the programs. For example, as shown in FIG. It is displayed (step S809).

Next, step S804 in FIG. 8 as an example of the operation of the viewing style determination unit 109 will be described with reference to FIG.
It is determined whether the recorded program selected from the epg information is a series program (step S1201). For example, the “Prague International Music Festival” whose series ID is “0000” in the epg information shown in FIG. 2 shows that the broadcast is a one-off program, and other two-digit series IDs are assigned. It can be determined that the program is a series program in which the broadcast is continuous. If the recorded program is a single program, it is determined that the program is not archived by the user as a “non-archive program” or “non-erase program” (step S1202). If it is determined in step S1201 that the recorded program is a series program, it is determined whether a viewing history exists in the series program of the recorded program for a certain period (for example, half a year) (step S1203).

  If there is no viewing history in the series program of the recorded program, it is determined that all programs of the series including the recorded program are “archive programs” as programs to be archived as a program archived by the user (step S1204). . As shown in the example of FIG. 13A, if all the series programs are recorded from the first time to all seven times and exist in the device and have not been viewed once, all the programs in the series are “archived programs”. Is determined. On the other hand, in step S1203, if there is a viewing history in the series program of the recorded program, it is viewed that the series viewing program remaining rate is calculated as described below (step S1205). In this case, the deleted program part is regarded as viewed.

Series viewing program remaining rate = (series program viewing and series program remaining) time / series program viewing time
If the series viewing program remaining rate of the recorded program is very large (step S1206), it is determined that most of the programs that have been viewed by the user are left in the device, and all the programs in the series are determined as “archive programs”. (Step S1208). As shown in the example of FIG. 13 (b), all of the series programs are recorded from the first time to all seven times, exist in the device, and have been viewed from the second time to the middle of the seventh time, and have been viewed. In the case where the program is hardly deleted and remains in the device, all the programs in the series are determined as “archive programs”.

  If the series viewing program remaining rate of the recorded program is very small (step S1206), it is assumed that most of the programs that have been viewed by the user are not left in the device, and all the programs in the series are “watched out”. (Step S1207). As shown in the example of FIG. 13 (d), all of the series programs are recorded from the first to all seven times, are present in the device, have been viewed from the first to the middle of the seventh time, and until the fifth time. Is already deleted and is not present in the device, all the programs in the series are determined to be “erased programs”.

  If the series viewing program remaining rate of the recorded program is medium (step S1206), an individual archive program is determined for each broadcast program of the series program. For example, in the case of FIG. 13C, the series viewing program remaining rate = the total time of the thin dotted line portion / the total time of the thin dotted line portion and the dark dotted line portion of FIG. Since the second deletion time is substantially equal to the total time, the series viewing program remaining rate is between 0 and 1, and the series viewing program remaining rate in this case corresponds to “medium”. Note that the branching of the processing depending on the size of the series viewing program remaining rate in step S1206 is, for example, provided with a threshold value, and is set to “very large” if the series viewing program remaining rate exceeds the threshold value 0.8. If it is small, it may be “very small”, and other values may be “medium” or may be determined by another method.

  For each broadcast program of the series program, the program viewing coverage is calculated as shown below (step S1209).

Program viewing coverage = Program viewing time / program broadcasting time
If the program viewing coverage for each broadcast program of the series program is large (step S1210), the broadcast program is determined as an “archive program” (step S1211). Conversely, if the program viewing coverage for each broadcast program of the series program is small (step S1210), the broadcast program is determined as a “non-archive program” (step S1212). As shown in the example of FIG. 13 (c), all the series programs are recorded from the first to the seventh time and are present in the device, and part of the first, third, fourth and sixth programs. Since the viewing time of the fourth and sixth programs is long, it is determined as an “archive program”, and the first and third programs are determined as “non-archive programs”. For the processing branching according to the magnitude of the program viewing coverage in step S1210, for example, a threshold is provided, and if the program viewing coverage exceeds the threshold 0.3, it is determined to be “large”, and if it is less, it is determined to be “small”. Alternatively, it may be determined by another method.

Next, step S807 of FIG. 8 as an example of the operation of the prediction model learning unit 111 will be described with reference to FIG.
The prediction model is acquired as a Bayesian network. When expressing and creating a prediction model in a Bayesian network, the following processing is performed. For example, it is assumed that a prediction model as shown in FIG. 15 is learned.
Structure definition data as shown in FIG. 9 defining the structure of the prediction model shown in FIG. 15 is read (step S1401). The program guide information of a past fixed period as shown in FIG. 2 is read from the recorded program management unit 103 (step S1402). Further, since the viewing style determination unit 109 has already acquired the epg information from the epg data management unit 113, the epg information may be read from the viewing style determination unit 109. The judgment information obtained by the viewing style judgment unit 109, which is a program to be viewed or archived, and the usage time zone information created from the viewing time zone identification unit 118 and the usage time zone judgment unit 119 are read (step S1403). ). A conditional probability value of each random variable in the Bayesian network is calculated (step S1404).

  The conditional probability of a random variable is obtained by calculating a value between the random variable and a variable in which an arc (an arrow in the figure) enters. For example, consider a variable “usage time zone” in FIG. As shown in FIG. 9, the “usage time zone” has variable values “Yes” and “No”. Furthermore, there is no arc in the random variable “Usage time zone”. Therefore, as a conditional probability value, “probability that the user's device usage time is the program viewing time zone” Pr (use time zone = Yes) and “probability that the user's device usage time is not the program viewing time zone”. Pr (usage time zone = No) is calculated. These refer to usage time zone information (see FIG. 5) created by the usage time zone determination unit 119 and indicating whether the device access time (specified time) of the user is the viewing time zone of each program. Thus, it can be given as the frequency value of all recorded programs.

  On the other hand, “interest in the series” is a random variable having “TRUE” and “FALSE” as shown in FIG. However, unlike the other random variables, the random variable “interest in the series” is a latent variable. In other words, the event is not observed and no data is collected. As a method for calculating a conditional probability value for such a latent variable, as an existing method, an EM algorithm (for example, Dempster, A. et al., “Maximum likelihood from incomplete data via the EM algorithm”, Journal of the Royal Statistical Society, B39, pp.1 {38, (1977).) Is known and can be determined by it. By calculating the conditional probability value for the latent variable, “probability that the user is interested in the series program” Pr (interest in the series = TRUE) and “the user has lost interest in the series program” Probability “Pr” (interest in the series = FALSE) is obtained.

  According to the embodiment described above, the usage time zone information that matches the time for viewing the program from the viewing time zone for each program by inputting the epg information and the operation history information and determining the viewing style for each program. By using, the viewing probability value is calculated for a plurality of recorded programs, and the programs are rearranged in descending order of the viewing probability value, so that the user can quickly find the desired recorded program from the plurality of recorded programs recorded by the user. Therefore, it is possible to reduce labor and time for accessing the recorded program.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The block diagram of the recorded program information display apparatus of embodiment. The figure which shows the electronic program guide information which the electronic program guide information receiving part of FIG. 1 receives. The figure which shows the operation history information which the operation history management part of FIG. 1 produces | generates. The figure for demonstrating a mode that the viewing time zone specific | specification part of FIG. 1 specifies a viewing time zone. The figure which shows the utilization time zone information which the utilization time zone determination part of FIG. 1 produces. The figure which shows the information which the viewing style determination part of FIG. 1 outputs. The figure which shows the information which the prediction model learning part of FIG. 1 outputs. The flowchart which shows an example of a series of operation | movement of the viewing style determination part of FIG. 1, a viewing time zone specific | specification part, a utilization time zone determination part, a prediction model learning part, a viewing probability calculation part, and a recorded program display part. The figure which shows the structural information of the prediction model which the prediction model learning part of FIG. 1 uses. The figure which shows the information which the viewing-and-listening probability calculation part of FIG. 1 outputs. The figure which shows the information which the recorded program display part of FIG. 1 shows. 9 is a flowchart showing an example of the operation in step S804 in FIG. The figure which shows the example in the case of determining whether it is a watching-erasing program, an archive program, a non-watching-erasing program, and a non-archive program. 9 is a flowchart showing an example of the operation in step S807 in FIG. The graph which shows the prediction model corresponding to the structure information of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Recorded program information display apparatus, 101 ... Recorded program receiving part, 102 ... Electronic program guide information receiving part, 103 ... Recorded program management part, 104 ... Recorded program data part, 105 * ..Viewing history data section 106... Viewing history management section 107... Operation history data section 108... Operation history management section 109 .. viewing style determination section 110. Determining unit 111 ... Predictive model learning unit 112 ... Viewing probability calculation unit 113 ... Epg data management unit 114 ... Epg data unit 115 ... Recorded program display unit 116 Recording program reservation section, 117... Recording reservation data section, 118... Viewing time zone specifying section, 119.

Claims (10)

First storage means for storing a plurality of recorded programs;
Second storage means for storing program guide information corresponding to the plurality of programs;
Creating means for creating operation history information about the operations performed by the user;
Extraction means for extracting viewing history information related to a program viewed by the user from the operation history information;
For each program, using the program guide information and the viewing history information, the program is a viewing erasure program that is viewed by the user and erased from the first storage means, or is not erased from the first storage means Determining means for determining a viewing style indicating whether the program is a program;
For each program, using the viewing history information, a specifying means for specifying a viewing time zone that the user views most often,
Acquisition means for acquiring usage time zone information indicating whether the viewing time zone and a certain time zone match for each program;
Third storage means for storing structure definition data of a prediction model for estimating whether the user is interested in the program;
For each program, the use time zone information, the viewing style, and the program guide information are applied to the prediction model, and the presence or absence of any one of the viewing styles on condition that the user is interested in the program A first calculation means for calculating a conditional probability which is
Second calculation means for calculating a user's viewing probability value by applying the conditional probability to the prediction model for each program;
A recorded program information display device comprising: a presenting unit that presents a program having a higher viewing probability value to a position that is easily understood by a user.   The prediction model is a model for predicting the user's viewing of a recorded program in accordance with the usage status of the user, and uses one or more of the usage time zone information, the viewing style, and the interest in the program. The recorded program information display device according to claim 1, wherein a user's viewing of the program is predicted.   3. The recorded program information display device according to claim 1, wherein the specifying unit specifies a time zone having the longest viewing time as the viewing time zone.   The first calculation means calculates a total of eight conditional probabilities, which are the presence or absence of one of the two viewing styles, on the condition that the user is interested in the program. The recorded program information display device according to any one of claims 1 to 3, characterized in that:   The first calculation means further calculates a conditional probability that is presence / absence of viewing on the condition that the user is interested in the program and whether or not the usage time period is the same. The recorded program information display apparatus of any one of Claim 1 to 4.   If the program is a series program, the determination means refers to the viewing history information of the series program, and the viewing time of viewing the series program and the program content corresponding to the viewing time remain in the first storage means. 2. The series program is determined to be the viewing-erased program when the remaining time in the first storage means is smaller than a first threshold using the remaining time. The recorded program information display device according to claim 5.   If the program is a series program, the determination means refers to the viewing history information of the series program, and the viewing time of viewing the series program and the program content corresponding to the viewing time remain in the first storage means. 2. The series program is determined to be the stored program when the remaining time in the first storage means is greater than a second threshold using the remaining time. The recorded program information display device according to claim 6.   If the program is a series program, the determination means refers to the viewing history information of the series program, and the viewing time of viewing the series program and the program content corresponding to the viewing time remain in the first storage means. If the degree of remaining in the first storage means is not less than the first threshold and not more than the second threshold, the time when the user viewed the series program is When it is longer than the threshold, the series program is determined as the stored program, and when the time when the user views the series program is equal to or less than the third threshold, the series program is determined as the viewing-erasure program. The recorded program information display device according to claim 1, wherein:   9. The recorded program information display device according to claim 1, wherein the program guide information includes information indicating whether the program is a series program. Reservation determination acquisition means for acquiring reservation determination information as to whether reservation of the series program has been canceled using the operation history information,
The first calculation means calculates the conditional probability by applying the reservation determination information, the usage time zone information, the viewing style, and the program guide information to the prediction model. The recorded program information display device according to claim 9.

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