JP4329439B2 - Information processing apparatus and method, program, and recording medium - Google Patents

Description

  The present invention relates to an information processing apparatus and method, a program, and a recording medium, and in particular, an information processing apparatus and method, a program, and a recording that can detect a user's preference for content such as a television program more accurately. It relates to the medium.

  In recent years, in broadcasting, digitization has progressed and it is possible to provide a large number of programs at the same time.

  Along with this, EPG (Electronic Program Guide), which is electronic data indicating the broadcast schedule of the program, corresponding to the so-called newspaper radio and television fields, in order to be able to quickly select the desired program from among many programs. Data is provided, and the viewer (user) can select a program using this EPG.

Further, it is proposed that the user's preference information is scored and learned based on the broadcast content information viewed and recorded by the user, the content corresponding to the user's preference information is searched from EPG data, and automatic recording is proposed. . (For example, patent document 1).
JP 2001-84220 A

  However, since the previous proposal only adds points for the broadcast programs that have been viewed and recorded, it is difficult to accurately detect the user's preference information, and there is a problem that the familiarity of the preference information is slow. It was.

  The present invention has been made in view of such a situation, and makes it possible to detect user preference information for content such as a television program more accurately and in a shorter period of time.

The information processing apparatus according to the present invention includes a receiving unit that receives, as a first content, content specified by a user from among a plurality of provided content, and a time that is the same as a time zone during which the first content is broadcast In the band, other content as a back program broadcast on a different channel is detected as the second content, and other content broadcast in a time zone different from the time zone in which the first content is broadcast is 3 for the first content , a point indicating the degree of preference of the user when the power is turned on, and a point indicating that a larger value is more preferred when the power is turned on. And calculating means for calculating so as to subtract the second content and maintain the third content. To.

The plurality of contents provided may be television programs available from the Internet, terrestrial broadcast, satellite broadcast, or cable network.

The information processing apparatus further includes a creation unit that creates a content list that displays names of a plurality of provided contents, and the detection unit uses different channels in the same time zone as the time zone in which the first content is broadcast in the content list. The broadcast content can be detected as the second content, and the content broadcast in a time zone different from the time zone in which the first content is broadcast can be detected as the third content.

From among a plurality of contents provided from the metadata and points of content, it calculates the recommendation degree of the index for recommending contents matching the user's preference, a plurality provided with high recommendation decreasing order Creation means for creating a recommended content list in which content names are arranged can be further provided.

  Further, the calculation means further subtracts the point as the preference information regarding the content that is displayed in the recommended content list but not received, as compared with the content that was not displayed in the recommended content list but was receivable. It can be calculated.

The information processing method of the present invention includes a reception step of receiving content specified by a user as a first content from among a plurality of provided content, and a time that is the same as a time zone during which the first content is broadcast. In the band, other content as a back program broadcast on a different channel is detected as the second content, and other content broadcast in a time zone different from the time zone in which the first content is broadcast is 3 for the first content , a point indicating the degree of preference of the user when the power is turned on, and a point indicating that a larger value is more preferred when the power is turned on. And calculating for subtracting for the second content and maintaining for the third content. And wherein the door.

The program of the present invention includes a reception step of receiving content specified by a user as a first content from among a plurality of provided content, and a time zone that is the same as a time zone during which the first content is broadcast. The other content as the back program broadcast on a different channel is detected as the second content, and the other content broadcast in a time zone different from the time zone in which the first content is broadcasted is the third content. A detection step for detecting content, and a point indicating the degree of preference of the user when the power is turned on, and a point indicating that a larger value is more preferable for the first content; And a calculation step for subtracting for the second content and maintaining for the third content. Characterized in that to execute the over data.

The recording medium of the present invention includes a reception step of receiving content designated by a user as a first content from among a plurality of provided content, and a time zone that is the same as a time zone during which the first content is broadcast In addition, another content as a back program broadcast on a different channel is detected as the second content, and another content broadcasted in a time zone different from the time zone in which the first content is broadcasted is the third content. The first content is added with a detection step for detecting the content of the first content and a point indicating the degree of preference of the user when the power is turned on, and indicating that a larger value is more preferable. A computing step of subtracting for the second content and maintaining for the third content. Programs to be executed by the motor is characterized in that it is recorded.

  In the present invention, points are added to the user's preference information for the received first content, points are subtracted for the second content as the back program, and for the third content Points are maintained.

  As described above, according to the present invention, broadcast content can be received. In particular, it is possible to acquire the preference information for the user's content more accurately and in a shorter period of time.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode of the present invention will be described below. The correspondence relationship between the disclosed invention and the embodiments is exemplified as follows. Although there are embodiments which are described in this specification but are not described here as corresponding to the invention, the embodiments correspond to the invention. It does not mean that it is not a thing. Conversely, even if an embodiment is described herein as corresponding to an invention, that means that the embodiment does not correspond to an invention other than the invention. Absent.

  Further, this description does not mean all the inventions described in the specification. In other words, this description is for the invention described in the specification and not claimed in this application, i.e., for the invention that will be applied for in the future or that will appear as a result of amendment and added. It does not deny existence.

According to the present invention, an information processing apparatus is provided. This information processing apparatus (for example, the television receiver 11 in FIG. 1) receives receiving means (for example, in FIG. 3) that receives, as the first content, content specified by the user from among a plurality of provided contents. The content receiving unit 102) detects other content as a back program broadcast on a different channel in the same time zone as the time when the first content is broadcast as the second content, When the power is turned on , the detection means (for example, the back program detection unit 106 in FIG. 3) that detects other content broadcast in a time zone different from the time zone in which the content is broadcast as the third content , a point indicating the degree of user's preference, the point indicating that greater value is choosy, for the first content by adding The second content is subtracted, comprising calculating means for calculating to maintain the third content (e.g., point addition unit 111 of FIG. 3) and a.

In this information processing apparatus, the plurality of contents to be provided can be television programs that can be obtained from the Internet, terrestrial broadcast, satellite wave broadcast, or cable network.

The information processing apparatus further includes creation means for creating a content list (for example, EPG 141 in FIG. 6) that displays names of a plurality of provided contents, and the detection means broadcasts the first content in the content list. Content that is broadcast on a different channel in the same time zone as the second time content is detected as second content , and content that is broadcast in a time zone different from the time zone in which the first content is broadcast is It can be detected as content.

This information processing apparatus calculates a recommendation level as an index for recommending content that matches the user's preference from the content metadata and points from among a plurality of provided content, and has a high recommendation level A creation means (for example, a content list creation unit 255 in FIG. 16) for creating a recommended content list (for example, the content list 221 in FIG. 13) in which names of a plurality of contents provided in order are arranged is further provided. Can do.

  In this information processing apparatus, the calculation means (for example, the recommendation level calculation unit 254 in FIG. 16) does not display the points as the preference information regarding the content that is displayed in the recommended content list but not received in the recommended content list. However, it is possible to further calculate so as to subtract larger than the content that can be received.

According to the present invention, an information processing method is provided. In this information processing method, a reception step (for example, step S1 in FIG. 4) of receiving a content designated by a user as a first content from a plurality of provided content, and the first content are broadcast. Other content as a back program broadcast on a different channel in the same time zone as the first time zone is detected as the second content and broadcast in a time zone different from the time zone in which the first content is broadcast A detection step (for example, step S5 in FIG. 4) for detecting the other content to be performed as the third content, and a point indicating the degree of preference of the user when the power is turned on. the point indicating a preference, the sum for the first content (e.g., step S34 of FIG. 5), a second near point Subtraction for (e.g., FIG step S38 of 5), including calculating step of calculating, as the third content is maintained (e.g., step S8 in FIG. 4) and.

According to the present invention, a program is provided. This program includes a reception step (for example, step S1 in FIG. 4) of receiving content specified by a user as a first content from among a plurality of provided content, and a time during which the first content is broadcast. Other content as a back program broadcast on a different channel in the same time zone as the zone is detected as the second content and broadcast in a time zone different from the time zone in which the first content is broadcast A detection step (for example, step S5 in FIG. 4) for detecting other content as the third content, and a point indicating the degree of preference of the user when the power is turned on. the point indicating that the addition for the first content (e.g., step S34 of FIG. 5), the second content For subtraction (e.g., FIG step S38 of 5), calculating step of calculating, as the third content is maintained (e.g., step S8 in FIG. 4) and causes the computer to execute.

  This program can be recorded on a recording medium.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a configuration example of an information processing system to which the present invention is applied.

  In this system, the content provider 20 digitizes the broadcast content 22 and transmits it from the transmission device 21 as a television broadcast signal. This signal is provided to the client 10 via a satellite (BS (Broadcasting Satellite), CS (Communications Satellite)) 1.

  The content provider 30 transmits the broadcast content 32 from the transmission device 31 as a digital or analog television broadcast signal. The digital television broadcast signal is provided to the client 10 via the satellite 1, and the analog television broadcast signal is provided to the client 10 via the communication tower 2. The digital television broadcast signal is also provided to the client 10 from the server 33 via the Internet 3.

  The content provider 40 provides broadcast content 42 from the server 41 to the client 10 via the Internet 3.

  Broadcast content metadata 22a, 32a, and 42a are created by the content providers 20, 30, and 40 corresponding to the broadcast content 22, 32, and 42, respectively.

  Note that cable broadcasting such as a cable network may be used as a broadcasting method of the television broadcasting signal. In FIG. 1, only one client 10 is shown, but a large number are actually provided.

  Hereinafter, when it is not necessary to individually distinguish the content providers 20, 30, or 40, and when it is not necessary to individually distinguish the broadcast contents 22, 32, or 42, the broadcast content metadata 22a, 32a, or 42a is further changed. When it is not necessary to distinguish between them, they are simply referred to as content provider P, broadcast content C, and broadcast content metadata M.

  A client 10 receives broadcast content C via an antenna 13 in a television receiver (hereinafter abbreviated as TV) 11. Alternatively, the TV 11 receives the broadcast content C via the Internet 3. The TV 11 stores the user profile 12 of the user in the internal storage unit 76. Note that the client 10 acquires information related to the broadcast schedule including the broadcast content metadata M in advance. The information regarding the broadcast schedule is, for example, EPG (Electronic Program Guide) data, which is provided via broadcast or the Internet 3.

  Also, the HDD 11 is connected to the TV 11, and the HDD recorder 14 records the broadcast content C broadcast and received by the TV 11 and stores it as the recorded content 15. Further, the HDD recorder 14 stores the recorded content metadata 15a by acquiring the broadcast content metadata M corresponding to the recorded content 15 from the EPG data at the same time as storing the recorded content 15.

  FIG. 2 is a block diagram showing an example of the internal configuration of the TV 11 when mainly demodulating digital television broadcast signals. Although not shown, the TV 11 also has a configuration for demodulating an analog television broadcast signal.

  The television broadcast signal received by the antenna 13 is supplied to the tuner 61 and is detected and demodulated under the control of the CPU 71. The output of the tuner 61 is supplied to a QPSK (Quadrature Phase Shift Keying) demodulating circuit 62 and is QPSK demodulated under the control of the CPU 71. The output of the QPSK demodulation circuit 62 is supplied to an error correction circuit 63, and an error is detected and corrected under the control of the CPU 71 and supplied to the demultiplexer 64.

  Under the control of the CPU 71, the demultiplexer 64 descrambles the output of the error correction circuit 63 as necessary, and further extracts a TS (Transport Stream) packet of a predetermined channel. The demultiplexer 64 supplies the TS packet of the image data (video data) to the MPEG (Moving Picture Experts Group) video decoder 65 and supplies the TS packet of the audio data (audio data) to the MPEG audio decoder 69. To do. Further, the demultiplexer 64 supplies the TS packet included in the output of the error correction circuit 63 to the CPU 71 as necessary. Further, the demultiplexer 64 receives image data or audio data (including those in the form of TS packets) supplied from the CPU 71, and supplies it to the MPEG video decoder 65 or the MPEG audio decoder 69.

  The MPEG video decoder 65 decodes the TS packet of the image data supplied from the demultiplexer 64 by the MPEG method and supplies it to the frame memory 66. The MPEG audio decoder 69 decodes the TS packet of the audio data supplied from the demultiplexer 64 by the MPEG method. Audio data obtained by decoding by the MPEG audio decoder 69 is supplied to the speaker 70.

  The frame memory 66 temporarily stores the image data output from the MPEG video decoder 65 and supplies it to an NTSC (National Television System Committee) encoder 67. The NTSC encoder 67 converts the image data supplied from the frame memory 66 into NTSC image data and supplies it to the CRT 68 for display.

  The CPU 71 executes various processes in accordance with programs stored in an EEPROM (Electrically Erasable Programmable Read Only Memory) 72 and a ROM (Read Only Memory) 73, whereby, for example, a tuner 61, a QPSK demodulation circuit 62, The error correction circuit 63, the demultiplexer 64, the communication unit 75, and the storage unit 76 are controlled. Further, the CPU 71 executes a process corresponding to a command supplied from the front panel 77 or the IR receiving unit 78 and a program stored in the storage unit 76.

  The EEPROM 72 stores data and programs that should be retained even after the power is turned off. The ROM 73 stores, for example, an IPL (Initial Program Loader) program. The data and programs stored in the EEPROM 72 can be upgraded by overwriting the data and programs.

  The RAM 74 temporarily stores data and programs necessary for the operation of the CPU 71.

  The communication unit 75 acquires various data such as EPG data from the outside at an appropriate time, and stores (updates) the acquired various data in the storage unit 76 under the control of the CPU 71.

  The storage unit 76 stores various programs for learning and profiling user preference information, and the CPU 71 executes predetermined processing based on the programs. In addition, the storage unit 76 accumulates (saves) the profile of each user who views the TV 11.

  The front panel 77 is provided on a part of the front surface of the TV 11. The front panel 77 has a button switch having the same function as a button switch provided on a remote controller (not shown) (not shown), and the button switch on the front panel 77 is operated. In that case, an operation signal corresponding to the operation is supplied to the CPU 71. In this case, the CPU 71 performs processing corresponding to the operation signal from the front panel 77.

  The IR receiver 78 receives (receives) infrared rays transmitted from the remote controller in response to the operation of the remote controller. Further, the IR receiving unit 78 photoelectrically converts the received infrared ray and supplies a signal obtained as a result to the CPU 71. In this case, the CPU 71 performs processing corresponding to the signal from the IR receiver 78, that is, processing corresponding to the operation of the remote controller.

  The signal processing unit 79 includes a DSP (Digital Signal Processor) 79a, an EEPROM 79b, a RAM 79c, and the like, and performs various types of digital signal processing on image data stored in the frame memory 76 under the control of the CPU 71. Apply.

  That is, the DSP 79a performs various signal processing using the data stored in the EEPROM 79b as necessary according to the program stored in the EEPROM 79b. The EEPROM 79b stores programs and necessary data for the DSP 79a to perform various processes. The RAM 79c temporarily stores data and programs necessary for the DSP 79a to perform various processes.

  The data and programs stored in the EEPROM 79b can be upgraded by overwriting the data and programs.

  The signal processing performed by the signal processing unit 79 includes, for example, decoding of closed caption data, superimposition of closed caption data on image data stored in the frame memory 66, expansion of image data stored in the frame memory 66, noise There is removal. In addition, the signal processing unit 79 generates OSD data for OSD display and superimposes it on the image data stored in the frame memory 66.

  The TV 11 configured as described above outputs an image and sound of the broadcast content 22 as a television broadcast program as follows (images are displayed and sound is output).

  That is, a transport stream as a television broadcast signal received by the antenna 13 is supplied to the demultiplexer 64. The demultiplexer 64 extracts TS packets of a predetermined program from the transport stream, supplies the TS packets of image data to the MPEG video decoder 65, and supplies the TS packets of audio data to the MPEG audio decoder 69. .

  In the MPEG video data coder 65, the TS packet from the demultiplexer 64 is MPEG-decoded. The resulting image data is input from the MPEG video decoder 65 to the NTSC encoder 67 via the frame memory 66, where it is converted into an NTSC signal and then supplied to the CRT 68 for display.

  On the other hand, in the MPEG audio decoder 69, the TS packet from the demultiplexer 64 is MPEG-decoded. The resulting audio data is supplied from the MPEG audio decoder 69 to the speaker 70 and output.

  FIG. 3 shows a functional configuration example of a user profile generation program executed by the CPU 71 of the TV 11. The user profile creation program is stored in the storage unit 76.

  In this example, an EPG data acquisition unit 101 that acquires EPG data including broadcast content metadata M, a content reception unit 102 that recognizes that broadcast content C has been received, and user operation information that the user inputs by operating a remote control or the like. When the user operation information acquisition unit 103 and the user operation information acquisition unit 103 acquire the broadcast content recording command from the user, the broadcast content metadata acquired from the broadcast content C and EPG data in the HDD recorder 14 A broadcast content recording unit 104 for recording M is provided.

  When the content being received is recorded as the recorded content 15 in the HDD recorder 14, the content receiving unit 102 causes the content metadata acquisition unit 108 to acquire the recorded content metadata 15a.

  Furthermore, the EPG data acquired by the EPG data acquisition unit 101 is being received based on information such as the reception start time of the broadcast content being received and the broadcast station (content provider P) supplied from the content reception unit 102. A received content specifying unit 105 for specifying the broadcast content is provided.

  Also, the received content specifying unit 105 supplies the back program detecting unit 106 with information such as the reception start time of the acquired content being received and the broadcasting station (content provider P). Further, the received content specifying unit 105 causes the flag setting unit 107 to set a flag indicating that the broadcast content is being received.

  After setting the flag, the flag setting unit 107 causes the content metadata acquisition unit 108 to acquire the content metadata of the content being received from the EPG data.

  The back program detection unit 106 detects broadcast content corresponding to a program (so-called back program) broadcasted in the same time zone (same time). Further, the back program detecting unit 106 causes the flag setting unit 107 to set a flag indicating broadcast content corresponding to the back program. After setting the flag, the flag setting unit 107 causes the content metadata acquisition unit 108 to acquire the broadcast content metadata of the detected back program.

  The content metadata acquisition unit 108 supplies each broadcast content metadata acquired from the EPG data and flagged to the flag determination unit 109. When the acquired content metadata is the recorded content metadata 15a, the value detection unit 110 is caused to detect the value of the recorded content metadata 15a. The broadcast content metadata and the value of the broadcast content metadata will be described later.

  Based on the flag attached to each broadcast content metadata M, the flag determination unit 109 determines whether or not the broadcast content metadata of the broadcast content being received on the TV 11, and sends to the value detection unit 110 a broadcast described later. The value included in the content metadata is detected.

  The value detection unit 110 supplies each value to the point addition unit 111 after detecting the value of each broadcast content metadata. The point addition unit 111 adds a plus point or a minus point to the user profile according to the determination result based on the supplied value and flag (adds or subtracts points).

  The user profile generation unit 112 integrates plus points or minus points added to the user profile, generates a user profile, and stores (accumulates) the user profile in the user profile storage unit 113.

  Next, user profile generation processing will be described with reference to FIG. This generation process is started when the TV 11 is turned on. At this time, the EPG data acquisition unit 101 acquires and holds EPG data in advance. The EPG data includes broadcast content metadata for each program (broadcast content).

  In step S <b> 1, the content receiving unit 102 receives the broadcast content and supplies it to the received content specifying unit 105. The received content specifying unit 105 specifies the broadcast content being received supplied from the content receiving unit 102 by comparing its reception start time, broadcast station (broadcast channel), etc. with that on the EPG data.

  In step S2, the flag setting unit 107 sets “11” as a flag indicating that the broadcast content is being received. By setting the flag, the broadcast content being received can be clearly distinguished from the broadcast content corresponding to the back program and other programs.

  In step S3, the content metadata acquisition unit 108 acquires broadcast content metadata of the broadcast content being received from the EPG data. In this content metadata, the flag is set to “11”.

  In step S4, user profile point addition processing is executed.

  Next, the point addition processing in the case of this user profile generation processing will be described with reference to the flowchart of FIG.

  In step 31, based on the flag, the flag determination unit 109 determines whether the broadcast content metadata acquired in step S3 is broadcast content metadata of the broadcast content being received. That is, it is determined whether or not the flag is “11”. When the broadcast content metadata acquired in step S3 is the broadcast content metadata of the broadcast content being received, in step S32, the value detection unit 110 determines the value of the broadcast content metadata (described later with reference to FIG. 7). ) Is detected. In step S33, the value detection unit 110 detects the value of the user profile (described later with reference to FIG. 8).

  In step S34, the point adding unit 111 adds, for example, +1 point as a plus point to the score of each value of the user profile corresponding to each value of the broadcast content metadata being received. A configuration example of broadcast content metadata and a user profile, and an example of point addition will be described later with reference to FIGS.

  In step S <b> 35, the user profile generation unit 112 generates or updates a user profile, and the user profile storage unit 113 stores the generated or updated user profile in the storage unit 76.

  Thereafter, the process proceeds to step S5 in FIG. 4, and the back program detection unit 106 detects the broadcast content corresponding to the back program for the broadcast content being received. Specifically, broadcast content broadcast on different broadcast stations (channels) is searched from EPG data in the same time zone as the reception time (current time) of the broadcast content being received, and this is used as the back program. The

  In step S6, the flag setting unit 107 sets “01” as a flag indicating that the broadcast content corresponds to the back program.

  In step S7, the content metadata acquisition unit 108 acquires the broadcast content metadata of the broadcast content corresponding to the back program from the EPG data. In this broadcast content metadata, a flag is set to “01”.

  In step S8, user profile point addition processing is executed.

  That is, in step 31 of FIG. 5, the flag determination unit 109 determines whether or not the broadcast content metadata acquired in step S7 is the broadcast content metadata of the broadcast content being received as described above based on the flag. Determine whether. That is, it is determined whether or not the flag is “11”. In this case, it is the broadcast content metadata of the back program, and the flag is set to “01”. Accordingly, in step S36, the value detection unit 110 detects the value of the broadcast content metadata of the back program. In step S37, the value detection unit 110 detects the value of the user profile.

  In step S38, the point addition unit 111 adds, for example, -1 point as a minus point to each value of the broadcast content metadata of the back program and each value of the corresponding user profile, and in step S35, the user profile The generation unit 112 generates or updates a user profile, and the user profile storage unit 113 stores the generated or updated user profile in the storage unit 76.

  A point addition method for the above user profile creation processing and a configuration example of broadcast content metadata will be described in more detail with reference to FIGS.

  The EPG 141 shown in FIG. 6 is WEB content described in HTML, in which a plurality of broadcasting stations are arranged in the horizontal axis direction, and programs scheduled to be broadcast in the respective broadcasting stations are displayed along the time axis in the vertical axis direction. Yes.

  The EPG 141 in FIG. 6 displays programs scheduled to be broadcast by each broadcast station from 12:00 to 15:00. For example, if the user is watching the program C-2 of the broadcasting station C at 13:15, the broadcasting station that is simultaneously broadcasting at the time of 13:15 (represented by the line 142 in the figure) A program A-3, broadcast station B program B-1, broadcast station D program D-2, broadcast station E program E-1, broadcast station F program F-3, broadcast station G program G- 1 and the program H-3 of the broadcasting station H are all programs behind the program C-2 of the broadcasting station C.

  FIG. 7 shows a configuration example of the broadcast content metadata 151. The broadcast content metadata 151 is broadcast content metadata of the program C-2. The broadcast content metadata 151 includes a program name, an attribute, and a value.

  The attribute represents the characteristics of the program (in the example of FIG. 7, program C-2), and is composed of “category”, “performer”, “keyword”, and “broadcast station”. In the value, an item further classifying each attribute is provided. For example, in the example of FIG. 7, the value for the “category” attribute is “drama”, and the value for the “performer” attribute is “A male”, “B child”, and “Y Taro”, For the attribute of “keyword”, “Edo”, “Tokugawa” and “bad actor”, and for the attribute of “broadcast station”, “broadcast station C” is provided as the value. Note that by setting the same number of attributes and values for all programs of each broadcasting station, user profiling can be performed fairly for all programs.

  FIG. 8 shows a configuration example of the user profile 161 of the user (user A in the case of FIG. 8). Similar to the constituent elements of the broadcast content metadata 151 in FIG. 7, attributes and values representing the taste characteristics of the user A are provided. As described above, when the user A is viewing the program C-2, if there is a value of the user profile 161 of FIG. 8 corresponding to the value of the broadcast content metadata 151 of FIG. Is added. In the example of FIGS. 7 and 8, +1 point is added to the values “drama”, “A male”, “Y Taro”, “Tokukawa” and “broadcast station C”.

  Further, in the value of the broadcast content metadata of the back program of the program C-2, when a value corresponding to the value of the user profile 161 exists, for example, when the program A-3 in FIG. 6 is a sports program, the user profile -1 point is added to “Sports” and “Broadcasting station A” with a value of 161.

  Next, with reference to FIG. 9, the manner in which points change according to time will be described as an example where points are added to “category” of broadcast content metadata and user profile attributes. In FIG. 9, a black circle represents a program viewed by the user, and a white circle represents a program (back program) broadcast in the same time zone. Black diamonds indicate recommended programs.

  In time zone 1, “sports”, “drama”, “talk”, and “news” programs are broadcast. When the user B views the “drama”, +1 point is added to the “drama”, and at the same time, −1 point is added to the “sports”, “talk”, and “news” programs that are the back programs. . At this time, the points of “variety”, “music”, and “animation” that are not broadcast in this time zone 1 are left as they are.

  The point added in time zone 1 is the recommended level of the program in time zone 2.

  In time zone 2, “sports”, “news”, “variety”, and “music” programs are broadcast. For users, “Variety” and “Music” programs with a high recommendation level (the highest point value) are recommended. Also, in time zone 2, user B has added +1 point to “sports” by viewing the “sports” program, and “news”, “variety”, and “music” programs, which are the back programs, are added. , -1 point is added. Points of “drama”, “talk”, and “animation” that are not broadcast in time zone 2 are left as they are.

  In time zone 3, “sports”, “drama”, “talk”, and “animation” are broadcast. The “drama” having the highest recommendation level (point is 1) is recommended to the user as a recommended program to the user. In addition, when user B views “drama” in time zone 3, +1 point is added to “drama” for a total of 2 points. Further, -1 point is added to the “sports”, “talk”, and “animation” programs that are back programs. The points of “news”, “variety”, and “music” that are not broadcast in time zone 3 are left as they are.

  In time zone 4, two types of [drama], “talk”, and “anime” programs with different broadcasting stations are broadcast. For user B, a “drama” with a recommendation level of 2 points is recommended. In time zone 4, user B views the “talk” program, so that “+1” is added to “talk”. Further, -1 point is added to the “drama”, “talk”, and “anime” programs which are the back programs. The points of “sports”, “news”, “variety” and “music” which are not broadcast are left as they are.

  In time zone 5, “news”, “variety”, “music”, and “animation” programs are broadcast. For user B, “variety” and “music” programs with a recommendation level of −1 point are recommended. The points of “sports”, “drama”, and “talk” that are not broadcast are left as they are.

  FIG. 10 is a configuration example of the user profile 181 of the user B. The score (point) of each value is “-1” for “sports”, 0 for “drama”, −1 for “talk”, −2 for “news”, −1 for “variety”, −1 for “music”, And “Animation” is −2. Therefore, the user B has obtained preference information that the user B is most interested in the “drama” (score is the highest) until the time zone 5. The most faintly interesting (small score) programs are “Sports” and “Talk”.

  Next, for comparison, an example in which +1 point is added only to a program viewed by the user will be described with reference to FIG.

  In time zone 1, “sports”, “drama”, “talk”, and “news” are broadcast. When the user views “drama”, +1 point is added to “drama”. The back program “Sports”, “Talk”, and “News” are treated in the same way as “Variety”, “Music”, and “Anime” that are not broadcast at the same time, and the points are left as they are. .

  In time zone 2, “sports”, “news”, “variety”, and “music” programs are broadcast. However, since no point is added to the program broadcast in time zone 2 (since the point is 0), it is unclear which program should be recommended to the user in time zone 2. In the time zone 2, the user views “Sports”, so that +1 point is added to “Sports”. The back programs “News”, “Variety”, and “Music” have the same points as “Drama”, “Talk”, and “Animation” that are not broadcast at the same time.

  In time zone 3, “sports”, “drama”, “talk”, and “animation” are broadcast. In time zone 3, “sports” and “drama” with a recommendation level of 1 point can be recommended to the user. In addition, when the user views the “drama” in the time zone 3, +1 point is added to the “drama”, which is a total of 2 points. The back programs “Sports”, “Talk”, and “Animation” have the same points as “News”, “Variety”, and “Music” that are not broadcast at the same time.

  In time zone 4, two types of [drama], “talk”, and “animation” with different broadcasting stations are broadcast. In time zone 4, “Drama” with a recommendation level of 2 points is recommended. In time zone 4, since the user is watching “talk”, +1 point is added to “talk”. The back program “Drama” and “Animation” have the same points as “Sports”, “News”, “Variety” and “Music” which are not broadcast at the same time.

  In time zone 5, “news”, “variety”, “music”, and “animation” are broadcast. However, in time zone 5, as in time zone 2, it is unclear which program should be recommended because points are not added to all broadcast programs (because all points are 0). is there.

  FIG. 12 shows a configuration example of the user profile 201 generated when the broadcast content is viewed as shown in FIG. In this case, the score of each value is 1 point for “sports”, 2 points for “drama”, and 1 point for “talk”.

  As apparent from the comparison of FIG. 12 with FIG. 10, it is difficult to accurately grasp the user's preference only by adding a plus point to the viewed program, and the familiarity of the preference information may be slow. Easy to understand.

  As shown in FIG. 13, only programs that can be viewed at that time may be displayed. FIG. 13 shows a state in which the names of programs of the respective broadcasting stations broadcast at the time indicated by the line 142 of the EPG 141 shown in FIG. Thereby, it is possible to introduce broadcast contents that can be easily viewed by the user.

  Even in this case, the user can view the desired broadcast content by selecting the broadcast content name on the content list 221. At this time, not only -1 point is added to the back program, but the value of the minus point can be changed according to the number of back programs. That is, as shown in FIG. 6, as compared with the case where a plurality of broadcast contents in a plurality of time periods are displayed at the same time, as shown in FIG. The broadcast content that can be received becomes clearer. Therefore, when one content is selected and received on the content list as shown in FIG. 13, the weight of the selection is clarified by changing the minus point depending on the number of back programs.

  For example, when the number of back programs displayed in the content list is 1 to 5, 1 point is added to the score of each value of the user profile corresponding to each value of the broadcast content metadata of the back program However, when the number of back programs is 6 to 10, -2 points may be added, and when the number of back programs is 11 or more, -3 points may be added.

  In the user profile generation process described above, the broadcast content received by the TV 11 and viewed by the user is processed. However, even when the user does not view and the HDD recorder 14 records, the user views. Since this is substantially the same as this, the same user profile generation process is performed when broadcasting content is recorded on the HDD recorder 14.

  Next, user profile generation processing for reproducing recorded content will be described with reference to the flowcharts of FIGS. This process is started when the recorded content 15 is reproduced from the HDD recorder 14.

  In step S 51, the content metadata acquisition unit 108 acquires the recorded content metadata 15 a of the recorded content 15 received by the content receiving unit 102 from the HDD recorder 14.

  Point addition processing is executed based on the recorded content metadata 15a acquired in step S52.

  Details of the point addition processing in step S52 are shown in FIG. The processing from step S71 to step S74 is basically the same as the processing from step S32 to step S35 in FIG.

  That is, since the recorded content 15 reproduced from the HDD recorder 14 cannot acquire broadcast content information corresponding to the back program, only +1 point is added to the user profile based on the recorded content metadata 15a. .

  FIG. 16 shows a functional configuration example of a recommended content list creation program executed by the CPU 71 of the TV 11.

  In this example, the user information acquisition unit 251 causes the receivable content detection unit 252 to detect receivable broadcast content from the EPG data when acquiring a command requesting display of the recommended content list from the user. The user information acquisition unit 251 causes the score acquisition unit 253 to acquire the score of each value of the user profile when a command requesting display of the recommended content list is input from the user.

  The receivable content detection unit 252 causes the score acquisition unit 253 to acquire the score of the value of each content after detecting all the receivable content.

  The score acquisition unit 253 acquires each value and each value score acquired from the user profile, and each value and each value score acquired from the broadcast content metadata of each receivable broadcast content, and a recommendation degree calculation unit 254.

  The recommendation level calculation unit 254 calculates a recommendation level for selecting content to be recommended to the user based on the supplied values and the scores of the values based on a method described later with reference to FIG.

  The content list creation unit 255 selects a preset number (for example, five) of highly recommended content from the receivable content based on the supplied recommendation level, lists the recommended content list. create. The recommended content list is displayed on the display unit 256.

  Next, recommended content list creation processing will be described with reference to FIG. The recommended content list creation process starts when the user presses a button such as a remote controller.

  In step S101, recommendation level calculation processing based on broadcast content metadata and a user profile is executed. Details of this processing are shown in FIG.

  In step S121, when the receivable content detection unit 252 is instructed by the user operation information acquisition unit 251 to generate a recommended content list, the receivable content detection unit 252 detects all broadcast content that can be received at that time.

  In step S122, the score acquisition unit 253 acquires a value and a score of each value from the broadcast content metadata (EPG data) of the receivable broadcast content detected in step S121.

  In step S123, the score acquisition unit 253 acquires a value corresponding to each value of each content metadata of receivable content and a score of each value from the user profile.

  In step S124, the recommendation level calculation unit 254 calculates the recommendation level.

  A specific recommendation degree calculation method will be described with reference to FIGS.

  FIG. 19 shows broadcast content metadata 281 of broadcast content that can be received. In the broadcast content metadata 281, a score uniquely determined by the broadcast station (content provider P) is inserted. As an example of adding a value score, for example, a method of assigning 15 points to each value from 15 points can be taken for each program.

  In the case of special broadcast content such as a 2-hour special, 30 points may be assigned and 30 points may be allocated to each value.

  Note that a method may be employed in which the content provider P freely adds points between 1 to 10 scores for each value. Correctly, in this case, in order to prevent high points from being added to the scores of all values, normalization may be performed after the addition of points, and then metadata may be mounted on EPG data or the like and provided to the user. Also, for broadcast content of rebroadcast, values corresponding to each value of the broadcast content metadata of the rebroadcast content are collected from the user profiles of multiple users, and the average value is collected as the broadcast content metadata of the rebroadcast content. The broadcast content metadata of the rebroadcast content may be created by applying it to the data value score.

  FIG. 20 shows a configuration example of the user profile 301 of the user D. The user profile 301 shows a state in which points are automatically added by viewing and recording of broadcast content several times. In addition, the user profile 301 may be configured such that the user manually adds points to his / her profile in advance according to his / her preference, or the TV 11 automatically learns from the beginning. .

  FIG. 21 is a diagram illustrating an example of a score calculation method. Note that the specific calculation is performed using the broadcast content metadata 281 in FIG. 19 and the user profile 301 in FIG. 20 as examples. That is, as shown in FIG. 19 and FIG. 20, each value score of the user profile 301 corresponding to each value score of the broadcast content metadata 281 is underlined, and this underline is drawn. An example of calculation using a certain score is shown below.

  The recommendation level calculation method 321 is a calculation method in the case where the content provider does not insert the score of the broadcast content metadata 281, and is a method of adding the value scores of the user profile 301 corresponding to each of the values of the broadcast content metadata 281. It is.

  That is, the recommendation level calculation unit 254 has a value “-1” for “Drama”, 3 points for “A male”, 4 points for “Y Taro”, −1 point for “Tokukawa”, and “Broadcast”. The two points of “Station A” are summed (−1 + 3 + 4 + (− 1) + 2 = 7). At this time, the recommendation level of the recommendation level calculation method 321 is “7”.

  The recommendation level calculation method 322 is a calculation method in the case where the content provider inserts the score of the broadcast content metadata 281 and takes the product of the value scores of the user profile 301 corresponding to each of the values of the broadcast content metadata 281. It is a method of calculating by summing up.

  That is, the recommendation degree calculation unit 254 has 1 point of “Drama” in the value of the broadcast content metadata 281, 3 points of “A male”, 2 points of “Y Taro”, 4 points of “Tokugawa”, and “Broadcast” “Station A”, 1 point of “Drama” in the value of the corresponding user profile 301, 3 points of “A male”, 4 points of “Y Taro”, −1 point of “Tokugawa”, and “ Multiply by 2 points of “Broadcasting station A” and add up ({1 × (−1)} + (3 × 3) + (2 × 4) + {4 × (−1)} + (1 × 2) = 14). At this time, the recommendation level of the recommendation level calculation method 322 is “14”.

  The recommendation level calculation method 323 is another calculation method in the case where the content provider inserts the score of the broadcast content metadata 281, and both the value score of the user profile 301 corresponding to each of the values of the broadcast content metadata 281. Is used, the inner product of the corresponding scores is taken, and the sum is calculated.

  That is, the recommendation degree calculation unit 254 has 1 point of “Drama” in the value of the broadcast content metadata 281, 3 points of “A male”, 2 points of “Y Taro”, 4 points of “Tokugawa”, and “Broadcast” “Station A”, 1 point of “Drama” in the value of the corresponding user profile 301, 3 points of “A male”, 4 points of “Y Taro”, −1 point of “Tokugawa”, and “ Calculate the inner product with the two points of “Broadcasting station A” and sum (| 1 | · | -1 | + | 3 | · | 3 | + | 2 | · | 4 | + | 4 | · | -1 | + | 1 |. | 2 |) = 24). The recommendation level of the recommendation level calculation method 323 is “24”.

  When the recommendation level is calculated as described above, in step S102 of FIG. 17, the content list creation unit 255 sets a number set in advance from the content of points with a high recommendation level calculated by the calculation method as described above. Only detect content. For example, the top five are detected.

  In step S103, the content list creation unit 255 creates a recommended content list that describes the names of the detected broadcast content.

  In step S <b> 104, the display unit 256 displays a recommended content list on the CRT 68.

  The functional configuration of the user profile generation program when creating a user profile using the recommended content list is as shown in FIG. In FIG. 22, the same reference numerals are given to the portions corresponding to those in FIG. 3, and detailed description thereof will be omitted as appropriate.

  When the user operation information acquisition unit 103 receives a command requesting display of the recommended content list from the user, the user operation information acquisition unit 103 causes the recommended content list display unit 341 to create and display the recommended content list by the above-described processing. In addition, the user operation information acquisition unit 103 supplies the operation information of the recommended content list from the user to the user operation information determination unit 342 as appropriate.

  The user operation information determination unit 342 causes the content reception unit 102 to receive broadcast content specified by selecting a recommended content list based on the supplied user operation information. Also, the user operation information determination unit 342 determines whether to receive broadcast content or whether to continue displaying the recommended content list based on the operation information.

  The content receiving unit 102 receives the selected broadcast content, and causes the received content specifying unit 105 to specify the broadcast content.

  Further, the point addition unit 111 adds a plus point to the broadcast content metadata of the broadcast content being received, and the back content when the user does not use the recommended content list for the broadcast content of the back program. A negative point larger than the negative point added to the program is added. Other configurations are the same as those in FIG.

  With reference to the flowcharts of FIGS. 23 and 24, user profile generation processing when receiving broadcast content using the recommended content list will be described. This process is started when the user operation information acquisition unit 103 is instructed to display the recommended content list by the user.

  In step S151, the recommended content list display unit 341 performs the processing described with reference to FIGS. 17 and 18 to create and display a recommended content list.

  In step S152, the user operation information determination unit 342 determines whether or not broadcast content has been selected based on the user operation information acquired by the user operation information acquisition unit 103.

  If the user operation information determination unit 342 determines in step S152 that no broadcast content has been selected, in step S161, based on the user operation information supplied from the user operation information acquisition unit 103, the recommended content list is displayed. It is determined whether or not to end the display. If the display of the recommended content list is not terminated, the process returns to step S152, and the subsequent processing is repeated.

  If it is determined in step S152 that the broadcast content has been selected, in step S153, the received content specifying unit 105 receives the specified broadcast content and specifies the broadcast content being received. Thereafter, in steps S154 to S160, the same processes as those in steps S2 to S8 described with reference to FIG. 4 are performed.

  FIG. 24 shows the point addition processing performed in steps S156 and S160 of FIG.

  The processes in steps S171 to S175 are basically the same as the processes in steps S31 to S35 described with reference to FIG.

  Further, in steps S176 and S177, the same processing as the processing in steps S36 and S37 described with reference to FIG. 5 is performed. Thereafter, in step S178, the point addition unit 111 is displayed in the recommended content list. However, for example, -2 points are added as a minus point to the score of each value of the user profile corresponding to each value of the broadcast content metadata of the broadcast content that has not been selected or received. That is, broadcast content that was displayed in the recommended content list but not selected (received) was not displayed in the recommended content list when compared with broadcast content that was not displayed in the recommended content list but was receivable. Is less than the interest in the broadcast content that could be received, and a large negative point is given to the user profile. It should be noted that the number of content names displayed on the recommended content list may be simply displayed in descending order of recommendation without limiting the number of content names to be displayed. In this case, as in the case where one content is selected on the content list in FIG. 13, the selection may be weighted by changing the minus point depending on the number of back programs.

  The subsequent processing is the same as in FIG.

  As described above, in the information processing system shown in FIG. 1, a plus point or a minus point is added to the user profile based on the broadcast content and the back program viewed by the user, and the point of the non-back program is left as it is. As a result, the number of logs for profiling increases, and preference information can be learned in more detail and in a shorter period of time.

  FIG. 25 shows another configuration example of the information processing system to which the present invention is applied. In FIG. 25, the same reference numerals are given to the portions corresponding to those in FIG. 1, and detailed description thereof will be omitted as appropriate.

  In this system, the content provider P provides the broadcast content C to the client 10 and provides the broadcast content metadata M attached to the EPG data or the like to the user profile server 401 of the user profile provider 400.

  In the user profile provider 400, the user profile server 401 communicates with the TV 11 via the Internet 3. As information indicating the received broadcast content C, the TV 11 provides, for example, a broadcast station and a reception start time to the user profile server 401 via the Internet 3.

  When the user profile server 401 receives information indicating the broadcast content C from the TV 11, the user profile server 401 performs the same processing as the TV 11 in FIG. 1 and creates the user profile 12.

  As described above, in the system of FIG. 25, by providing the user profile server 401 on the Internet 3, information processing that can receive content when each user holds an ID and views the broadcast content C is possible. By inputting an ID into the device, it is possible to familiarize each user's preference information even when using an information processing device capable of receiving content on the go.

  FIG. 26 shows still another configuration example of the information processing system to which the present invention is applied. In FIG. 26, parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

  In this system, the content provider P provides the broadcast content metadata M attached to the broadcast content C and EPG data to the client 10.

  In the user profile provider 500, the user profile server 501 communicates with the TV 11 via the Internet 3. The TV 11 acquires the broadcast content metadata M of the received broadcast content C, and supplies the broadcast content metadata of the broadcast content being received and the broadcast content metadata of the broadcast content corresponding to the back program to the user profile server 501. .

  The user profile server 501 includes a user profile 12 and can generate and update a user profile based on each broadcast content metadata supplied.

  As described above, in the system of FIG. 26, the user profile server 501 to which the present invention is applied is provided on the Internet 3 as in the system of FIG. When viewing, by inputting an ID to an information processing device capable of receiving content, it is possible to familiarize each user's preference information even when using an information processing device capable of receiving content on the go It becomes.

  FIG. 27 is a diagram showing still another configuration example of the information processing system to which the present invention is applied. In FIG. 27, the same reference numerals are given to portions corresponding to those in FIG. 1, and detailed description thereof will be omitted as appropriate. PersonalKey (hereinafter abbreviated as PK) 601 has a user profile 12. Further, the PK 601 and the TV 11 can communicate with each other.

  The content provider P provides the broadcast content metadata M attached to the broadcast content C and EPG data to the client 10.

  The TV 11 acquires the broadcast content metadata M of the received broadcast content C, and supplies the PK 601 with the broadcast content metadata of the broadcast content being received and the broadcast content metadata of the broadcast content corresponding to the back program.

  The PK 601 includes a user profile 12 and can generate and update a user profile based on each broadcast content metadata supplied.

  As described above, by using the PK 601 in the information processing system in FIG. 27, even when viewing content on the go, profiling can be performed based on the viewing data. In addition, by not requiring a connection environment via the Internet, it becomes possible to protect the privacy of the user, and give the user a sense of security.

  In the above embodiment, the case where the present invention is applied to a TV is described. However, the present invention is applied to an HDD recorder having means for collecting viewing information of content viewed by a user, and various other information processing apparatuses. Can do.

It is a figure which shows the structural example of the information processing system to which this invention is applied. It is a block diagram which shows the example of an internal structure of a television receiver. It is a block diagram which shows the functional structural example of a user profile production | generation program. It is a flowchart for demonstrating a user profile production | generation process. It is a flowchart for demonstrating point addition processing. It is a figure which shows the example of EPG. It is a figure which shows the structural example of broadcast content metadata. It is a figure which shows the structural example of a user profile. It is a figure explaining the change of a point. It is a figure which shows the structural example of the user profile after point addition. It is a figure explaining the change of another point. It is a figure which shows the structural example of the other user profile after point addition. It is a figure which shows the example of a display of a content list. It is a flowchart for demonstrating a user profile production | generation process in the case of reproducing | regenerating recorded content. It is a flowchart for demonstrating the point addition process in the case of reproducing | regenerating recorded content. It is a block diagram which shows the functional structural example of a recommended content list creation program. It is a flowchart for demonstrating recommended content list creation processing. It is a flowchart for demonstrating recommendation degree calculation processing. It is a figure which shows the structural example of the content metadata to which the point was added. It is a figure which shows the structural example of the user profile to which the point was added. It is a figure explaining the recommendation degree calculation method. It is a block diagram which shows the functional structural example of the user profile creation program in the case of receiving broadcast content using a recommended content list. It is a flowchart for demonstrating a user profile production | generation process in the case of receiving broadcast content using a recommended content list. It is a flowchart for demonstrating the point addition process in the case of receiving broadcast content using a recommended content list. It is a figure which shows the other structural example of the information processing system to which this invention is applied. It is a figure which shows the further another structural example of the information processing system to which this invention is applied. The It is a figure which shows the further another structural example of the information processing system to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Television receiver, 102 Content receiving part, 106 Back program detection part, 111 Point addition part, 112 User profile production | generation part, 113 User profile memory | storage part, 221 Content list, 254 Recommendation degree calculation part, 255 Content list creation part,

Claims (8)

Receiving means for receiving, as the first content, content specified by the user from among a plurality of provided content;
In the same time zone as the time when the first content is broadcast , other content as a back program broadcast on a different channel is detected as the second content, and the first content is broadcast. Detecting means for detecting, as the third content, other content broadcasted in a different time zone from
When the power is turned on , a point indicating the degree of preference of the user, a point indicating that a larger value is more preferable, is added for the first content, and for the second content An information processing apparatus comprising: calculating means for subtracting and calculating so as to maintain the third content. The information processing apparatus according to claim 1, wherein the plurality of contents to be provided are television programs that can be obtained from the Internet, terrestrial broadcasting, satellite broadcasting, or a cable network. Further comprising a creating means for creating a content list for displaying the name of a plurality of said contents to be provided,
The detecting device, in the content list, the the first of the same time zone and the time zone in which content is broadcast, and detects a content broadcast on a different channel as the second content, the first content The information processing apparatus according to claim 2, wherein content broadcast in a time zone different from a time zone in which is broadcast is detected as the third content. The recommendation level as an index for recommending the content that matches the user's preference is calculated from the content metadata and the points from among the plurality of provided content, and is provided in descending order of the recommendation level. The information processing apparatus according to claim 2, further comprising: a creation unit that creates a recommended content list in which names of the plurality of contents to be arranged are arranged. The calculation means subtracts the point as the preference information related to the content that is displayed in the recommended content list but not received, as compared with the content that is not displayed in the recommended content list but can be received. The information processing apparatus according to claim 4, wherein the calculation is further performed. A receiving step of receiving, as the first content, content specified by the user from among a plurality of provided content;
In the same time zone as the time when the first content is broadcast , other content as a back program broadcast on a different channel is detected as the second content, and the first content is broadcast. A detection step of detecting, as the third content, other content that is broadcast in a different time zone from
When the power is turned on , a point indicating the degree of preference of the user, a point indicating that a larger value is more preferable, is added for the first content, and for the second content Includes a calculation step of subtracting and calculating to maintain the third content. A receiving step of receiving, as the first content, content specified by the user from among a plurality of provided content;
In the same time zone as the time when the first content is broadcast , other content as a back program broadcast on a different channel is detected as the second content, and the first content is broadcast. A detection step of detecting, as the third content, other content that is broadcast in a different time zone from
When the power is turned on , a point indicating the degree of preference of the user, a point indicating that a larger value is more preferable, is added for the first content, and for the second content A computer program causing a computer to execute a calculation step of subtracting and calculating to maintain the third content. A receiving step of receiving, as the first content, content specified by the user from among a plurality of provided content;
In the same time zone as the time when the first content is broadcast , other content as a back program broadcast on a different channel is detected as the second content, and the first content is broadcast. A detection step of detecting, as the third content, other content that is broadcast in a different time zone from
When the power is turned on , a point indicating the degree of preference of the user, a point indicating that a larger value is more preferable, is added for the first content, and for the second content A recording medium on which is recorded a program that causes a computer to execute a calculation step of subtracting and calculating to maintain the third content.

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