JP2012160107A - Information processing unit and information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display the search result of a keyword search and representative documents corresponding to keywords at high speed.SOLUTION: An information processing unit 100 includes: a broadcast program information acquisition unit 14a for acquiring broadcast program information viewed by a user; a keyword extraction unit 14b for extracting a keyword associated with a broadcast program from the program information; and an access destination preliminary acquisition unit 14c for searching documents on a network N1 by an extracted keyword, acquiring the search result, acquiring representative documents on the network corresponding to the keyword form the acquired search result, and storing the search result and representative documents in a cache 14d.

Description

  The present invention relates to an information processing apparatus and an information processing method.

  Patent Document 1 discloses an information providing system that provides viewers with program-related information on the Internet related to a television broadcast program. In this information providing system, when the viewer is interested in the program related information of the program being viewed, the viewer transmits the channel number and broadcast date / time of the program to the browser from the TV receiver remote control, and the channel number from the browser. A URL (Uniform Resource Locator) including the broadcast date and time is transmitted to the server, the URL of the program related information corresponding to the combination of the channel number and the broadcast date and time is received from the server, and the program related information is accessed using the URL.

JP 2001-51926 A

  By the way, a viewer of a program searches a document on the network by a keyword (program name, performer name, etc.) related to the program, acquires a search result, and representative documents corresponding to the keyword from the search result. May get. For example, a viewer may perform a keyword search using a search service on the Internet to obtain a search result page, and may access an official homepage of a program or performer from the search result page.

  As described above, when accessing a search result of a keyword search or a representative document corresponding to the keyword, it is necessary to acquire such information from the network, and it takes time to display the information.

  SUMMARY An advantage of some aspects of the invention is that it provides an information processing apparatus and an information processing method capable of displaying a search result of a keyword search and a representative document corresponding to the keyword at high speed.

  An information processing apparatus according to the present invention includes a program information acquisition unit that acquires program information of a program viewed by a user, a keyword extraction unit that extracts a keyword related to the program from the acquired program information, and the extraction A search result acquisition unit for searching a document on the network using the keyword and acquiring a search result; a document acquisition unit for acquiring a document on a representative network corresponding to the keyword from the acquired search result; Storage control means for storing the acquired search results and a representative document in a storage means.

  The information processing method according to the present invention includes a program information acquisition step for acquiring program information of a program viewed by a user, a keyword extraction step for extracting a keyword related to the program from the acquired program information, A search result acquisition step of searching a document on the network with the extracted keyword and acquiring a search result, and a document acquisition step of acquiring a document on a representative network corresponding to the keyword from the acquired search result And a storage control step of storing the acquired search result and a representative document in a storage means.

  According to the present invention, it is possible to display a search result of a keyword search and a representative document corresponding to the keyword at high speed.

3 is a block diagram illustrating an example of a configuration of an information processing device in Embodiment 1. FIG. It is a figure which shows an example of the keyword weighting information which shows the weight allocated to each item for every genre of a program. It is a figure which shows an example of the keyword weighting information which shows the weight allocated to each item for every sub genre of a program. It is a figure which shows an example of the keyword weighting information which shows the weight allocated to each kind of additional special character. 6 is a flowchart illustrating an example of processing of the information processing device when extracting keywords in the first embodiment. It is a figure which shows an example of the keyword management information produced or updated by the keyword extraction process of FIG. 5 is a flowchart illustrating an example of processing of the information processing apparatus when acquiring a search result and a representative document in Embodiment 1 in advance. 6 is a flowchart illustrating an example of processing of the information processing apparatus when editing search screen display information according to the first embodiment. 5 is a flowchart illustrating an example of processing of the information processing device when displaying a search result in the first embodiment. 5 is a flowchart illustrating an example of processing of the information processing apparatus when displaying a representative document according to the first embodiment. It is a figure which shows an example of the keyword management information produced or updated by the keyword extraction part in Embodiment 2. 10 is a diagram illustrating an example of cache management information created or updated by an access destination pre-acquisition unit in Embodiment 2. FIG. 10 is a schematic diagram illustrating an example of a configuration of an information processing system according to Embodiment 3. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram illustrating an example of the configuration of the information processing apparatus 100 according to the first embodiment. The information processing apparatus 100 retrieves a document on the network N1 by using a keyword related to the program viewed by the user, acquires a retrieval result, and retrieves a document on the representative network N1 corresponding to the keyword from the retrieval result. The acquired search result and the representative document are stored. The network N1 is specifically a telecommunications network or a computer network, and here is the Internet.

  In this example, the information processing apparatus 100 is an information display control apparatus having a function of causing the video display apparatus 200 to display stored search results and representative documents in accordance with user operations. The information processing apparatus 100 is a digital broadcast receiving apparatus having a digital broadcast receiving function for receiving a digital television broadcast and displaying it on the video display apparatus 200. Furthermore, the information processing apparatus 100 has a network television function for browsing or viewing content on the network N1. In one aspect, the information processing apparatus 100 and the video display apparatus 200 are physically integrated and constitute an information display apparatus such as a digital television. However, the information processing apparatus 100 and the video display apparatus 200 may be physically configured separately. Examples of the content on the network N1 include Web content such as HTML (HyperText Markup Language) content and network streaming content such as Actvila and YouTube. FIG. 1 illustrates a content server 300 that provides Web content and streaming content as an example of a server on the network N1 that provides content to the information processing apparatus 100.

  In FIG. 1, the information processing apparatus 100 includes a local bus 1 as a data transmission path, a CPU (Central Processing Unit) 2a, a ROM (Read Only Memory) 2b, and a RAM (Random Access Memory) 2c. Is provided. Furthermore, the information processing apparatus 100 includes an antenna 3, a tuner unit 4, a demodulation LSI (Large Scale Integration) 5, a demultiplexer 6, an MPEG2 (Moving Picture Experts Group phase 2) decoder 7, an HDD (Hard Disk Drive) 8, A streaming reception processing unit 9, a DRM (Digital Rights Management) processing unit 10, a decryptor 11, a Web browser 12, a network interface 13, a back end unit 14, and an AV output interface 15 are provided.

  The CPU 2a controls the ROM 2b, the RAM 2c, the demodulation LSI 5, the demultiplexer 6, the MPEG2 decoder 7, the decryptor 10 and the like through the local bus 1 and receives the response results. The ROM 2b is a read-only nonvolatile memory in which programs and data used for the CPU 2a are recorded. The RAM 2c is a readable / writable volatile memory for temporarily storing programs and data used for the CPU 2a.

  The antenna 3, the tuner unit 4, the demodulation LSI 5, the demultiplexer 6, and the MPEG2 decoder 7 are mainly for realizing a digital broadcast receiving function. The radio wave information received by the antenna 3 is passed through the tuner unit 4 to the demodulation LSI 5, the demultiplexer 6, and the MPEG2 decoder 7, and is output from the AV output interface 15 as a video signal and an audio signal. Is displayed. Specifically, the tuner unit 4 extracts a signal of any channel frequency from the signals of a plurality of channels included in the radio wave information and outputs the extracted signal to the demodulation LSI 5. The demodulation LSI 5 demodulates the signal from the tuner unit 4 and corrects an error, and outputs a transport stream (TS). The demultiplexer 6 acquires service information (SI: Service Information) and program specific information (PSI: Program Specific Information) from the TS demodulated by the demodulation LSI 5, and from these information, the video TS packet and the audio TS packet in the TS. The TS packet identifier value of at least one type of TS packet is detected, and this TS packet is output to the MPEG2 decoder 7. The MPEG2 decoder 7 decodes at least one type of TS packet out of the video TS packet and audio TS packet from the demultiplexer 6, and outputs the obtained decoded signal to the video display device 200 via the AV output interface 15. . When recording a program, the TS output from the demodulation LSI 5 is recorded in the HDD 8. When reproducing the recorded program, the TS recorded in the HDD 8 is input to the demultiplexer 6 and reproduced.

  The streaming reception processing unit 9, the DRM processing unit 10, the decryptor 11, the web browser 12, and the network interface 13 are mainly for realizing a network television function. The streaming reception processing unit 9 receives streaming content from the content server 300 via the network interface 13. The DRM processing unit 10 acquires a key for decrypting the received streaming content from the content server 300 via the network interface 13. The decryptor 11 uses the acquired key to decrypt the received streaming content and generate a TS. The TS is output to the video display device 200 via the demultiplexer 6, the MPEG2 decoder 7, and the AV output interface 15, and the streaming content is displayed on the video display device 200. The Web browser 12 is, for example, an HTML browser, acquires Web content from the content server 300 via the network interface 13, and causes the video display device 200 to display the Web content.

  The back end unit 14 includes a program information acquisition unit 14a, a keyword extraction unit 14b, an access destination pre-acquisition unit 14c, a cache 14d, a display control unit 14e, a parser 14f, and a display information editing unit 14g.

  The program information acquisition unit 14a acquires program information of a program viewed by the user. Specifically, the program information acquisition unit 14a acquires program information of a program that is being viewed by the user and program information of a recorded program that is being viewed by the user. The program viewed by the user is, for example, a television broadcast program received by the antenna 3 and displayed on the video display device 200. The recorded program viewed by the user is, for example, a television broadcast program that is recorded on the HDD 8 and then reproduced and displayed on the video display device 200. Specifically, the program information acquisition unit 14a acquires program information transmitted from a broadcasting station such as digital television broadcasting and received by the antenna 3. However, the program information may be acquired from the network N1. The program viewed by the user may be a program (for example, streaming content) on the network N1.

  The keyword extraction unit 14b extracts keywords related to the program from the program information acquired by the program information acquisition unit 14a. The keyword is, for example, a program name or a performer name.

  In one aspect, the keyword extraction unit 14b calculates an index value indicating the degree of appearance of the extracted keyword (hereinafter referred to as “keyword score”), and keyword management information in which the keyword is associated with the keyword score. Generate and hold The keyword management information is held in a storage area in the information processing apparatus 100, for example, but may be held in a storage area outside the information processing apparatus 100. The calculation of the keyword score will be described in detail later.

  The access destination pre-acquisition unit 14c searches the document on the network N1 with the keyword extracted by the keyword extraction unit 14b, and acquires the search result. Specifically, the access destination pre-acquisition unit 14c uses a search service (or a search engine, a search site, a search server, a search page) on the network N1, and documents (for example, Web pages such as HTML pages) on the network N1. Page) keyword search. The search result is specifically a document indicating a list of searched documents, and more specifically, a search result page indicating a list of position information (link) of the searched documents on the network N1.

  In one aspect, the access destination pre-acquisition part 14c performs a search by the keyword using the keyword management information. Specifically, the access destination pre-acquisition unit 14c selectively or preferentially uses a keyword having a high keyword score among keywords included in the keyword management information. For example, the access destination pre-acquisition unit 14c performs a search by selecting a keyword whose keyword score is higher than a predetermined value or a keyword whose keyword score is higher than a predetermined value.

  The access destination pre-acquisition unit 14c acquires a document on the representative network N1 corresponding to the keyword related to the search result from the acquired search result. Specifically, the access destination pre-acquisition unit 14c analyzes the search result using the parser 14f to grasp the position information of the representative document, and acquires the representative document from the network N1. A typical document corresponding to the keyword is specifically a document whose subject is the keyword, a document explaining the keyword, a document published by a person or an organization of the keyword, and the like. More specifically, a typical document corresponding to a keyword is, for example, an official homepage (official HP) of a keyword (program, program performer, etc.). However, the representative document corresponding to the keyword may be a document other than the official HP such as the top link destination page of the document list of the search result or the page corresponding to the keyword of the encyclopedia site.

  The access destination pre-acquisition unit 14c stores the acquired search result and a representative document in a storage unit (in this case, the cache 14d).

  The cache 14d is a storage area for storing information such as search results and representative documents from the access destination pre-acquisition unit 14c.

  The display control unit 14e performs processing for displaying the search result and the representative document stored in the cache 14d. For example, the display control unit 14 e displays the search result page and the official HP on the video display device 200 via the Web browser 12 and the AV output interface 15.

  The display control unit 14e displays a search result corresponding to the keyword stored in the cache 14d when a user operation for searching a document on the network N1 is performed using the keyword, and the keyword on the network N1 is displayed based on the keyword. Search for a document, newly acquire a search result, and when the newly acquired search result is different from the displayed search result, display the newly acquired search result instead of the displayed search result . For example, when the display control unit 14e detects a user operation for performing a search by a keyword on the search page using the web browser 12, the display control unit 14e displays a search result page corresponding to the keyword stored in the cache 14d on the video display device 200. Display. Then, the display control unit 14e performs a search using the keyword on the search page to newly acquire a search result page, and the newly acquired search result page and the search result page stored in the cache 14d Are determined to be different from each other, and when the two are determined to be different, the video display device 200 displays a newly acquired search result page instead of the displayed search result page. In the example of FIG. 1, the display control unit 14 e determines whether or not both are different by multiplying the newly acquired search result page and the stored search result page on the parser 14 f.

  In addition, when a user operation to access a document on the representative network N1 corresponding to the keyword is performed, the display control unit 14e displays the document stored in the cache 14d and displays the document on the network N1. When the newly acquired document is different from the displayed document, the newly acquired document is displayed instead of the displayed document. For example, when the display control unit 14e detects a user operation (for example, an operation for selecting a link of the official HP on the search result page) to access the keyword's official HP using the Web browser 12, the display control unit 14e stores the keyword in the cache 14d. The official HP of the keyword is displayed on the video display device 200. Then, the display control unit 14e newly acquires the official HP, determines whether or not the newly acquired official HP is different from the official HP stored in the cache 14d, and determines that both are different. When it is, the video display device 200 displays the newly acquired official HP instead of the displayed official HP. In the example of FIG. 1, the display control unit 14 e determines whether or not they are different by multiplying the newly acquired official HP and the stored official HP by the parser 14 f.

  The parser 14f analyzes information such as search results stored in the cache 14d. For example, the parser 14f is an HTML parser that analyzes an HTML file. Specifically, the parser 14f analyzes the search result page to grasp the link of the representative document of the keyword, and newly acquired pages (search result page, representative official HP, etc.) and cache A process is performed to determine whether or not the page (search result page, representative official HP, etc.) stored in 14d is different.

  The display information editing unit 14g selects, as the search keyword (search word), the keyword extracted by the keyword extraction unit 14b as the search screen display information used for displaying the search screen for searching the document on the network N1. Edit to be displayed on the search screen as possible. Specifically, the display information editing unit 14g edits the cookie of the search page received from the search server so that the extracted keyword is displayed so as to be selectable in the search field of the search page. The search page cookie is information used when the Web browser 12 displays the search page. By editing the cookie, the user can select the extracted keyword in the search field of the search page as a search keyword without having to input characters when using the search page.

  In one aspect, the display information editing unit 14g edits the search screen display information using the keyword management information. Specifically, the display information editing unit 14g selectively registers a keyword with a high keyword score among the keywords included in the keyword management information in the search screen display information. For example, the display information editing unit 14g registers, in the search screen display information, keywords whose keyword score is higher than a predetermined value or keywords whose keyword score is higher than a predetermined value.

  Note that the function of the back-end unit 14 is realized by cooperation of hardware resources and software in one aspect. Specifically, the function of the back end unit 14 is realized by executing an information processing program by a computer, and more specifically, the information processing program recorded on a recording medium such as the ROM 2b is read to the RAM 2c. This is realized by being executed by the CPU 2a. The information processing program may be provided by being recorded on a computer-readable recording medium such as an optical disk, or may be provided via a communication line such as the Internet. Further, the function of the back end unit 14 may be realized only by hardware resources such as an electronic circuit.

  In the above example, the program information acquisition unit is realized by the program information acquisition unit 14a, the keyword extraction unit is realized by the keyword extraction unit 14b, and the search result acquisition unit, the document acquisition unit, and the storage control unit are accessed in advance. The display control unit is realized by the acquisition unit 14c, the display control unit is realized by the display control unit 14e, and the display information editing unit is realized by the display information editing unit 14f.

  Hereinafter, calculation of an index value (keyword score) indicating the degree of appearance of a keyword by the keyword extraction unit 14b will be described with reference to first to fourth examples.

[First example]
The keyword extraction unit 14b calculates the number of times the keyword has been extracted (that is, the number of appearances of the keyword) as the keyword score of the keyword.
When the program information includes information of three items of “program name”, “performer”, and “program content”, in this example, the weight of the appearance of the keyword is the same between the items, and the keyword extraction unit 14b For example, the keyword score is calculated by the following formula (1).
Keyword score = Σ (Keyword appearance)
= Number of occurrences of "program name" keyword +
“Performers” keyword appearance count +
Number of occurrences of “program contents” keyword (1)

[Second example]
The program information includes a plurality of items, and the keyword extracting unit 14b uses weights assigned in advance to the items of the program information, and weights the appearance of the keywords according to the item from which the keywords are extracted. , Calculate keyword score. Therefore, in this example, the weight of appearance of the keyword (contribution to the keyword score) is determined by the item from which the keyword is extracted. Specifically, the weight of each item is set so that the user's viewing preference is reflected in the keyword score.
When the program information includes information of three items of “program name”, “performer”, and “program content”, the keyword extraction unit 14b calculates the keyword score by the following equation (2), for example.
Keyword score = Σ (Keyword appearance number x Weight)
= "Program name" keyword appearance count x "Program name" weight +
“Performer” keyword appearance count × “Performer” weight +
Number of occurrences of “program content” keyword × “program content” weight (2)

[Third example]
The program information includes a plurality of items and further includes type information indicating the type of program. The keyword extraction unit 14b uses a weight assigned to each item in advance for each type of program, and for the appearance of the keyword, the type of program indicated by the type information included in the program information from which the keyword is extracted, The keyword score is calculated by weighting according to the item from which the keyword is extracted. Therefore, in this example, the appearance weight of the keyword is determined by the type of program from which the keyword is extracted and the item from which the keyword is extracted. Specifically, the weight of each item is set so that the user's viewing preference is reflected in the keyword score.
When the program information includes information of three items of “program name”, “performer”, and “program content”, the keyword extraction unit 14b calculates the keyword score by the above formula (2), for example. However, in this example, the “program name” weight, the “performer” weight, and the “program content” weight in Expression (2) are assigned for each type of program.

  Specifically, in digital television broadcasting, for example, programs are divided into a plurality of genres (genre classification), and further divided into a plurality of sub-genres (genre classification) in the genre. Genre information indicating the genre to which the program belongs, and sub-genre information indicating the sub-genre to which the program belongs.

  In the first aspect of this example, the genre is a program type, and the genre information is type information. That is, the keyword extracting unit 14b performs weighting according to the genre and item of the program using the weight assigned in advance to each item for each genre of the program. Specifically, the keyword extraction unit 14 b holds keyword weighting information 20 indicating the weight assigned to each item for each program genre as shown in FIG. 2, and weights based on the keyword weighting information 20. I do. In FIG. 2, for each genre, a weight is set for each of the three items of “program name”, “performer”, and “program content”.

  In the second aspect of the present example, the sub-genre is a program type, and the sub-genre information is type information. That is, the keyword extraction unit 14b performs weighting according to the sub-genre and item of the program using the weight assigned in advance to each item for each sub-genre of the program. Specifically, the keyword extraction unit 14 b holds keyword weighting information 30 indicating the weight assigned to each item for each program sub-genre as shown in FIG. 3, and based on the keyword weighting information 30. Perform weighting. In FIG. 3, for each sub-genre of the genre, a weight is set for each of the three items of “program name”, “performer”, and “program content”. In the second mode, since the weight is set for each sub-genre, it is possible to set a finer weight than the first mode in which the weight is set for each genre. For example, in the keyword weighting information 30 shown in FIG. 3 and the keyword weighting information 20 shown in FIG. It has become. On the other hand, in the keyword weighting information 30, for the sub-genre “general”, the weight of each item is x0.5, and for the sub-genre “special feature”, “program name”, “performer”, The weights of “program contents” are x1, x1, and x2, respectively. In other words, in the “special feature” in which the broadcast content is clearly identified, it is considered that there are many users who pay special attention to the program content, so the weight of the “program content” is greater than the weight of the other items. Has been. Focusing on the genre “music”, in the keyword weighting information 20, the weights of “program name”, “performer”, and “program content” are x1.5, x3, and x2, respectively, regardless of the sub-genre. It has become. On the other hand, in the keyword weighting information 30, for the sub-genre “karaoke” where the performers do not particularly attract attention, the weights of “program name”, “performer”, and “program content” are respectively x1, x 0.5, x1, and the weight of the “performer” is smaller than the other items.

[Fourth example]
The program information further includes additional special characters (also referred to as additional special symbols) in addition to the above type information. Specifically, this additional special character is a special character added to the program information in digital television broadcasting or the like. The keyword extraction unit 14b uses the weight assigned in advance to each type of additional special character, and for the appearance of the keyword, the type of program from which the keyword is extracted, the item from which the keyword is extracted, and the keyword The keyword score is calculated by performing weighting according to the type of additional special characters of the extracted program information. Therefore, in this example, the weight of the appearance of the keyword is determined by the type of program from which the keyword is extracted, the item from which the keyword is extracted, and the additional special character of the program from which the keyword is extracted. Specifically, the weight of each type of additional special character is set so that the user's viewing preference is reflected in the keyword score.
When the program information includes information of three items of “program name”, “performer”, and “program content”, the keyword extraction unit 14b calculates the keyword score by the following equation (3), for example. In equation (3), the total keyword score is calculated by multiplying the sum of the keyword scores of each item by the weight of the additional special character.
Keyword score = {Σ (keyword appearance number × weight)} × “additional special character” weight
= ("Program name" keyword appearance count x "program name" weight +
“Performer” keyword appearance count × “Performer” weight +
Number of occurrences of "program content" keyword x "program content" weight) x
"Additional special characters" weight (3)

  Specifically, in addition to the keyword weighting information 20 or 30, the keyword extraction unit 14b holds keyword weighting information 40 indicating the weight assigned to each type of additional special character as shown in FIG. The weighting is performed based on the keyword weighting information 40. In the example of FIG. 4, a weight is set for each additional special character indicating “news”, “weather forecast”, “drama movie”, etc., for each genre of the program. Note that the weight of the additional special character is the value indicated by the keyword weighting information 40 when the program information includes the additional special character, but the value “1” when the program information does not include the additional special character. Further, the weight of the additional special character may be set for each sub-genre, or may be a value that does not depend on the genre or the sub-genre.

  Hereinafter, when using the above equation (1) (that is, when not using keyword weighting information), when using the above equation (3) and keyword weighting information 20, and above equation (4) and keyword weighting information 30, A specific example of the calculation of the keyword score for the case of using 40 will be shown. Here, the keyword score for seven days from Monday to Sunday is calculated, and the following case is assumed. One user is interested in actor and artist Masaharu Fukuya. In the above 7 days, Masaharu Fukuya appeared only in the last two programs of the live broadcast music program “Music Station” and the drama “Ryukaden”, and the user watched the two programs. In addition, the user watched the news program “News 7” every day, but is not interested in the caster Noyama Masaiku just because he was interested in the content of the news. In both “Music Station” and “Ryukaden” program information, the keyword “Fukutani Masaharu” was included in the “performer” information and the “program content” information. In addition, the program information for any day of the week of “News 7” includes the keyword “Noyama Masaiku” in the “performer” information and the “program content” information. In addition, the program information of “Music Station” includes an additional special character indicating live broadcasting, and the program information of “Ryukaden” includes an additional special character indicating the last episode. The program information of “News 7” did not include additional special characters.

[When using formula (1)]
Keyword "Fujiya Masaharu"
"Music Station": Score = 0 + 1 + 1 = 2
"Ryukaden":: Score = 0 + 1 + 1 = 2
Total: Score = 2 + 2 = 4
Keyword "Noyama Masaiku"
“News 7 (Monday)”: Score = 0 + 1 + 1 = 2
“News 7 (Tuesday)”: Score = 0 + 1 + 1 = 2
“News 7 (Wednesday)”: Score = 0 + 1 + 1 = 2
“News 7 (Thursday)”: Score = 0 + 1 + 1 = 2
“News 7 (Friday)”: Score = 0 + 1 + 1 = 2
“News 7 (Saturday)”: Score = 0 + 1 + 1 = 2
“News 7 (Sunday)”: Score = 0 + 1 + 1 = 2
Total: Score = 2 × 7 = 14
Comparing the keyword scores (total scores) of the above two keywords, the score of Masaharu Fukuya (4 points), which is of interest to the user, is lower than the score of Masanobu Noyama (14 points), which is less interesting for the user. Yes.

[When using formula (3) and keyword weighting information 20]
Keyword "Fujiya Masaharu"
“Music Station”: Score = 0 × 1.5 + 1 × 3 + 1 × 2 = 5
"Ryukaden": Score = 0x3 + 1x2 + 1x1 = 3
Total: Score = 5 + 3 = 8
Keyword "Noyama Masaiku"
“News 7 (Monday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
“News 7 (Tuesday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
“News 7 (Wednesday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
“News 7 (Thursday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
“News 7 (Friday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
“News 7 (Saturday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
“News 7 (Sunday)”: Score = 0 × 0.5 + 1 × 0.5 + 1 × 0.5 = 1
Total: Score = 1 x 7 = 7
Comparing the keyword scores (total score) of the above two keywords, Masaharu Fukutani, who is originally interested in the user (8 points), is higher than the score (7 points) of Masanobu Noyama, who is less interested in the user. The user's viewing preference is reflected in the keyword score.

[When using formula (4) and keyword weighting information 30, 40]
Keyword "Fujiya Masaharu"
“Music Station”: Score = (0 × 1.5 + 1 × 3 + 1 × 2) × 1.5 = 7.5
"Ryukaden": Score = (0x3 + 1x2 + 1x1) x1.5 = 4.5
Total:: Score = 7.5 + 4.5 = 12
Keyword "Noyama Masaiku"
“News 7 (Monday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
“News 7 (Tuesday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
“News 7 (Wednesday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
“News 7 (Thursday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
“News 7 (Friday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
“News 7 (Saturday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
“News 7 (Sunday)”: Score = (0 × 0.5 + 1 × 0.5 + 1 × 0.5) × 1 = 1
Total: Score = 1 x 7 = 7
Comparing the keyword scores (total scores) of these two keywords, Masaharu Fukutani, who is originally interested in the user (12 points), is considerably higher than the score (7 points) of Masanobu Noyama, who is less interested in the user. Thus, the viewing preference of the user is remarkably reflected in the keyword score.

Hereinafter, the operation of the information processing apparatus 100 will be described.
FIG. 5 is a flowchart illustrating an example of processing of the information processing apparatus 100 when extracting keywords in the first embodiment. Hereinafter, an example of processing for extracting a keyword will be described with reference to FIG.

  When the information processing apparatus 100 detects that the user has watched a program (including a recorded and played program) (for example, when it is detected that the program is continuously displayed on the video display apparatus 200 for a predetermined time or more), The program information of the viewed program is acquired (S11).

  Next, the information processing apparatus 100 extracts keywords from the program information acquired in step S11, and calculates the keyword score of each extracted keyword (S12). Specifically, the information processing apparatus 100 calculates the keyword score by the above formula (3) based on the keyword weighting information 30 and 40 for all the extracted keywords.

  Next, the information processing apparatus 100 creates or updates keyword management information in which the keyword is associated with the keyword score based on the keyword extracted in step S12 and the calculated keyword score (S13). Specifically, the information processing apparatus 100 newly registers a keyword that is not registered in the keyword management information among the extracted keywords in the keyword management information by associating the keyword with the keyword score. For the keyword registered in the management information, the keyword score calculated in step S12 is added to the keyword score recorded for the keyword to update the keyword score of the keyword.

  The process of FIG. 5 is repeatedly executed every time the user views the program. Therefore, every time the user views the program, new registration of keywords and keyword scores, addition of keyword scores, and the like are performed, and the keyword management information is updated.

  In the first embodiment, the information processing apparatus 100 performs, for example, keyword extraction and keyword score calculation for all programs viewed by the user from the past (for example, from the start of use of the information processing apparatus 100) to the present. All the extracted keywords and the total value of the keyword scores of each keyword are reflected in the keyword management information.

  FIG. 6 is a diagram showing an example of keyword management information created or updated by the keyword extraction process of FIG. In FIG. 6, the keywords extracted in step S12 of FIG. 5 are associated with the keyword scores, and the keyword scores are arranged in descending order.

  FIG. 7 is a flowchart illustrating an example of processing of the information processing apparatus 100 when acquiring a search result and a representative document in Embodiment 1 in advance. Hereinafter, with reference to FIG. 7, an example of processing when acquiring a search result and a representative document in advance will be described. This process is executed at a predetermined timing, for example. Examples of the predetermined timing include a time when the keyword management information is updated, a predetermined time, and a time when the information processing apparatus 100 is turned on, but may be determined as appropriate. The processing is performed in the background, for example.

  The information processing apparatus 100 uses the search page on the network N1 to perform a document search on the network N1 using the extracted keyword based on the keyword management information, obtains the inspection result page, and stores it in the cache 14d (S21). ).

  Next, the information processing apparatus 100 analyzes the search result page acquired in step S21 and grasps the link of the official HP of the keyword (program performer, program, etc.) (S22).

  Next, the information processing apparatus 100 acquires the official HP of the keyword based on the link grasped in step S22 and stores it in the cache 14d (S23). At this time, the information processing apparatus 100 may add the address of the official HP to “Favorites” of the Web browser 12.

  The processes in steps S21 to S23 are performed for all keywords having, for example, the top five keyword scores.

  FIG. 8 is a flowchart illustrating an example of processing of the information processing apparatus 100 when editing search screen display information according to the first embodiment. Hereinafter, an example of processing when editing the search screen display information will be described with reference to FIG. This process is executed at a predetermined timing, for example. Examples of the predetermined timing include a time when the keyword management information is updated, a predetermined time, and a time when the information processing apparatus 100 is turned on, but may be determined as appropriate. The processing is performed in the background, for example.

  The information processing apparatus 100 acquires a keyword from the keyword management information (S31). For example, the information processing apparatus 100 acquires all the keywords having the highest keyword score among the keywords included in the keyword management information.

  Next, the information processing apparatus 100 edits the search page cookie received from the search server so that the keyword acquired in step S31 is selectably displayed in the search field of the search page (S32). As a result, when displaying the search page, the Web browser 12 displays the keyword in the search field based on the edited cookie.

  FIG. 9 is a flowchart illustrating an example of processing of the information processing apparatus 100 when displaying the search result in the first embodiment. Hereinafter, an example of processing when displaying the search result will be described with reference to FIG.

  When the information processing apparatus 100 detects that the user has used the search page by the Web browser 12 to search for the search result page using the keyword acquired in advance in the process of FIG. 7 (for example, the user When it is detected that a keyword displayed so as to be selectable in the search field is selected as a search keyword), the search result page of the keyword already stored in the cache 14d is displayed on the video display device 200 (S41).

  Thereafter, the information processing apparatus 100 performs a search using the keyword on the search page in the background, and newly acquires a search result page (S42).

  Next, the information processing apparatus 100 determines whether or not the search result page acquired in step S42 and the search result page displayed in step S41 are different from each other (S43).

  If it is determined that the two search result pages are different (S43: YES), the information processing apparatus 100 replaces the currently displayed search result page with the newly acquired search result page, and performs a new search. The result page is displayed on the video display device 200 (S44).

  On the other hand, when it is determined that both search result pages are the same (S43: NO), the information processing apparatus 100 keeps the search result page currently displayed.

  The process of FIG. 9 is repeatedly performed every time the keyword search is performed by the user.

  FIG. 10 is a flowchart illustrating an example of processing of the information processing apparatus 100 when displaying a representative document in the first embodiment. Hereinafter, an example of processing when displaying a representative document will be described with reference to FIG.

  When the information processing apparatus 100 detects that the user has performed an operation to access the official HP acquired in advance in the process of FIG. 7 by the Web browser 12 (for example, displayed in step S41 or S44 of FIG. 9). When a user operation to click on the link of the official HP is detected on the search result page), the official HP already stored in the cache 14d is displayed on the video display device 200 (S51).

  Thereafter, the information processing apparatus 100 accesses the official HP on the search result page in the background, and newly acquires the official HP (S52).

  Next, the information processing apparatus 100 determines whether or not the official HP acquired in step S52 is different from the official HP displayed in step S51 (S53).

  If it is determined that the two official HPs are different (S53: YES), the information processing apparatus 100 replaces the currently displayed official HP with the newly acquired official HP, and displays the new official HP as a video. It is displayed on the display device 200 (S54).

  On the other hand, when it is determined that the two official HPs are the same (S53: NO), the information processing apparatus 100 keeps the currently displayed official HP.

  The process of FIG. 10 is repeatedly executed every time the user performs an access operation to the official HP.

According to the first embodiment described above, the following effects (1) to (9) can be obtained.
(1) In the present embodiment, the information processing apparatus extracts a keyword related to the program from the program information of the program viewed by the user, searches a document on the network using the keyword, and acquires a search result. The representative network document corresponding to the keyword is acquired from the search result, and the search result and the representative document are stored in the storage unit. Therefore, according to the present embodiment, it is possible to display a search result of a keyword search and a representative document corresponding to the keyword at high speed.
Specifically, when the user actually tries to access the search result page or the official HP, the search result page or the official HP acquired in advance and stored in the cache is displayed to speed up the display. It can be realized.
For example, in the system described in Patent Literature 1, when acquiring the program related information of the viewed program, the user needs to access the URL of the program related information using a browser and acquire the program related information from the server. Yes, it takes time to display the program related information. On the other hand, in this embodiment, the search result page and the official HP are acquired in advance and stored in the cache, so that these pages can be displayed at high speed.
Further, for example, in the system described in Patent Document 1, when the URL of the program related information registered in the server does not reflect the viewing preference of the user, the user obtains desired information even when accessing the URL. However, it is necessary to search for desired information separately using a search page or the like, which may be troublesome twice. In contrast, in the present embodiment, the search result page can also be displayed at high speed, so that documents other than the official HP can be easily found.

  (2) When a user operation for searching a document on the network by a keyword is performed, the information processing apparatus displays a search result corresponding to the keyword acquired and stored in advance, and the keyword on the network is displayed. A search result is newly acquired by searching a document, and when the newly acquired search result is different from the displayed search result, the newly acquired search result is displayed instead of the displayed search result. Thereby, the latest search result can be displayed while displaying the search result at a high speed in accordance with a user operation.

  (3) When a user operation to access a typical network document corresponding to the keyword is performed, the information processing apparatus displays the document that has been acquired and stored in advance, and the document is newly created from the network. When the newly acquired document is different from the displayed document, the newly acquired document is displayed instead of the displayed document. Accordingly, the latest document can be displayed while a representative document is displayed at a high speed in accordance with a user operation.

  (4) The information processing apparatus calculates an index value (keyword score) indicating the appearance degree of the keyword, and generates keyword management information in which the keyword is associated with the keyword score. According to this configuration, a keyword having a high keyword score can be selected as a keyword reflecting the user's viewing preference based on the keyword management information. Then, by performing a keyword search using the keyword management information (specifically, by selecting a keyword having a high keyword score and performing a keyword search), the search result corresponding to the keyword reflecting the user's viewing preference, A representative document can be obtained.

  (5) The information processing apparatus calculates the keyword score by weighting the appearance of the keyword according to the item from which the keyword is extracted, using the weight assigned in advance to each item of the program information. According to this configuration, by assigning the weight of each item so that a keyword that is more interesting to the user has a higher keyword score, the user's viewing preference can be further improved as compared with the case where the appearance count is simply set as the keyword score. It can be reflected in the keyword score.

  (6) The information processing apparatus uses the weight assigned in advance to each item of the program information for each program type, and for the appearance of the keyword, the type of the program from which the keyword is extracted and the keyword is extracted. The keyword score is calculated by weighting according to the item. According to this configuration, weights can be set finely according to the type of program, and the user's viewing preference can be more reflected in the keyword score.

  (7) In (5) above, the type of program is a sub-genre in the genre to which the program belongs. According to this configuration, the weight can be set more finely than in the case where the weight is set for each program genre, and the viewing preference of the user can be more reflected in the keyword score.

  (8) The information processing apparatus uses the weight assigned in advance to each type of additional special character, and includes the type of program, the item of program information, and the program information from which the keyword is extracted for the appearance of the keyword. The keyword score is calculated by weighting according to the type of additional special character to be generated. According to this configuration, the weight can be set more finely according to the type of the additional special character, and the user's viewing preference can be more reflected in the keyword score.

  (9) The information processing apparatus displays the search screen display information used for displaying the search screen for searching the document on the network so that the extracted keyword can be selected as a search keyword on the search screen. To edit. Thereby, the user can select the keyword extracted from the program information by the information processing apparatus as the search keyword when performing the keyword search on the search screen (for example, the screen of the search page).

Embodiment 2. FIG.
Hereinafter, the information processing apparatus 100 in Embodiment 2 is shown. Since the information processing apparatus 100 according to the second embodiment is almost the same as that according to the first embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified. And

  In the present embodiment, the keyword extraction unit 14b sets a time limit for retaining the keyword in the keyword management information for the extracted keyword. Specifically, the keyword extraction unit 14b sets a retention period for each keyword managed by the keyword management information, and creates or updates keyword management information in which the keyword is associated with the keyword score and the retention period. To do. Further, when the keyword expiration date has expired, the keyword extraction unit 14b deletes or deletes the keyword (or the keyword and its keyword score) from the keyword management information. Therefore, in the present embodiment, the keyword management information reflects relatively recent keywords and keyword scores, and does not reflect old keywords and keyword scores. As the keyword retention period, for example, a time after a predetermined time has elapsed since the end of the program from which the keyword was extracted (or when viewing ends), a time after the predetermined time has elapsed since the keyword was extracted, and the like are set. The However, the keyword retention period may be other than the above.

  In the present embodiment, the access destination pre-acquisition unit 14c sets a time limit for retaining the search result or representative document in the cache 14d for the acquired search result or representative document. Specifically, the access destination pre-acquisition unit 14c sets a retention period for each search result and each representative document stored in the cache 14d, and stores the search result storage location and the representative document storage location. Then, document management information (hereinafter referred to as “cache management information”) associated with these retention dates is created or updated, and information in the cache 14d is managed using the cache management information. This cache management information is generated in the cache 14d, for example. In addition, when the search result or the representative document retention period expires, the access destination pre-acquisition unit 14c deletes or deletes the search result or the representative document from the cache 14d. Therefore, in the present embodiment, relatively recent search results and representative documents are held in the cache 14d, and old ones are not held. Examples of the retention period include a time after a predetermined time has elapsed since the end of the program from which the corresponding keyword was extracted (or when viewing ended), a time after the predetermined time has elapsed since the corresponding keyword was extracted, and the like. Is set. However, the search result and the retention period of the representative document may be other than the above. In addition, the search result and the retention period of the representative document may be set in synchronization with the retention period of the corresponding keyword. For example, the search result and the representative document corresponding to the keyword when the retention period of the keyword expires. Is set to expire.

  FIG. 11 is a diagram illustrating an example of keyword management information created or updated by the keyword extraction unit 14b according to the second embodiment. In FIG. 11, the keyword management information includes the keyword extracted by the keyword extraction process of FIG. 5, the keyword score of the keyword, the viewing flag of the program from which the keyword is extracted, the end time of the program, It includes a record associated with an expiration time that is the retention period of the keyword, and the records are arranged in descending order of the keyword score. The viewing flag is a flag indicating whether or not the program from which the keyword is extracted is currently viewed. “1” is set when viewing, and “0” is set when not viewing. . The end time of the program is acquired from, for example, program information of the program and recorded. The keyword expiration time is set to a time two hours after the program end time. Specifically, in the example of FIG. 11, since the user is currently watching the drama “Ryukaden” that ends at 20:45 on November 28, as shown in the upper part of FIG. The program name and its performer name are extracted as keywords and recorded in the keyword management information. The viewing flag corresponding to these keywords is “1” indicating that the keyword is currently being viewed. The keyword expiration time is set to 22:45 on November 28, two hours after the program end time. Thereafter, when the drama ends, as shown in the lower part of FIG. 11, the viewing flag of the keyword corresponding to the drama becomes “0” indicating that the drama is not currently being viewed.

  FIG. 12 is a diagram illustrating an example of cache management information created or updated by the access destination pre-acquisition unit 14c according to the second embodiment. The cache management information in FIG. 12 stores the keywords managed in the keyword management information in FIG. 11, the search result page and official HP page names corresponding to the keywords, the search result page and the official HP. Information indicating a page storage location, a discard flag indicating whether or not to discard the search result page and the official HP, a current time, and an expiration time that is a retention period of the search result page and the official HP are associated with each other It has been. The cache management information in FIG. 12 is such that when the keyword is deleted at the expiration time, the search result page and the official HP in the cache 14d acquired based on the keyword are deleted. Synchronized with.

  In the keyword management information shown in Fig. 11, the keywords with the top five keywords are "Ryukaden", "Masaharu Fukutani", "Yoko Maki", "Masao Endo", and "Takaya Shimokawa". The unit 14c acquires the search result page and the official HP corresponding to these five keywords and stores them in the cache 14d. Then, as shown in FIG. 12, the access destination pre-acquisition unit 14 c associates the above five keywords with the search result page corresponding to the keyword and information indicating the storage location of the official HP, etc. in the cache management information. sign up.

  At the time of 21:34 on November 28, 49 minutes after the end of the program of the drama “Ryukaden”, neither the keyword corresponding to the program nor the page in the cache 14d has expired. As shown in the upper part of FIG. 12, the discard flag is “0” indicating not to be discarded. After that, at 22:46 on November 28, two hours and one minute after the end of the program of the drama “Ryukaden”, the page expiration time has passed, so the cache management information discard flag is shown in the lower part of FIG. As shown in the figure, it becomes “1” indicating that the page in the cache 14d is to be discarded, and the search result page and the official HP corresponding to the drama in the cache 14d are discarded. At this time, the record corresponding to the drama in the keyword management information is also discarded.

According to the second embodiment described above, the following effects (10) to (11) can be obtained in addition to the effects (1) to (9).
(10) For the extracted keyword, the information processing apparatus sets a time limit for retaining the keyword in the keyword management information. For this reason, it is possible to delete information related to a keyword whose term has expired from the keyword management information. As a result, the capacity of the keyword management information can be reduced, and as a result, the information processing apparatus 100 can be configured at a lower cost.

  (11) The information processing apparatus sets a time limit for holding the search result or the representative document in the storage unit for the search result or the representative document stored in the storage unit. For this reason, a search result or a representative document whose term has expired can be deleted from the storage unit. Thereby, the capacity | capacitance (for example, memory capacity allocated to a cache) of a memory | storage part can be decreased, and it becomes possible to comprise the information processing apparatus 100 more cheaply by extension. Until the time limit expires, information stored in the storage unit can be used to display a search result and a representative document at high speed.

Embodiment 3 FIG.
FIG. 13 is a schematic diagram illustrating an example of the configuration of the information processing system 500 according to the third embodiment.

  The information processing system 500 includes a first information processing apparatus (for example, 100a) and a second information processing apparatus (for example, 100b).

  The first information processing apparatus has a function of transmitting information to the second information processing apparatus in addition to the function of the information processing apparatus 100 of the first or second embodiment. Here, the transmitted information includes the search result acquired by the access destination pre-acquisition unit 14c or its storage location, the representative document acquired by the access destination pre-acquisition unit 14c, or its storage location, and the keyword extraction unit 14b. It is at least one of the created keyword management information, search screen display information edited by the display information editing unit 14g, and cache management information. That is, the information to be transmitted is all or part of the plurality of information listed above. More specifically, the information to be transmitted is the search result page stored in the cache 14d or its storage location, the official HP stored in the cache 14d or its storage location, as shown in FIG. 6 or FIG. At least one piece of information such as keyword management information, edited cookies, and cache management information.

  On the other hand, the second information processing apparatus has a function of receiving and using information from the first information processing apparatus. Here, as a function of using information, for example, a function of displaying a search result or a representative document, a function of acquiring and displaying a search result or a representative document from the storage location, and keyword management information are used. There are a function for performing a keyword search to acquire a search result and a representative document, a function for displaying a search screen using search screen display information, and a function for managing a cache using cache management information. In one aspect, the second information processing apparatus has the above function in addition to the function of the information processing apparatus 100 of the first or second embodiment. The second information processing apparatus may use the information from the first information processing apparatus by merging it with the same type of information that the second information processing apparatus has.

  Similarly to the first information processing apparatus, the second information processing apparatus may have a function of transmitting information to another information processing apparatus (for example, the first information processing apparatus). The first information processing apparatus may have a function of receiving and using information from another information processing apparatus (for example, the second information processing apparatus), similarly to the second information processing apparatus. In one aspect, the first and second information processing apparatuses are similar devices.

  The function of transmitting the information and the function of receiving and using the information are realized by, for example, the back end unit 14.

  In the example of FIG. 13, the information processing system 500 includes a plurality (specifically, three) of information processing apparatuses 100a, 100b, and 100c, which are connected to a relatively small network N2 such as a home network. Yes. A network N1 is connected to the network N2. The information processing apparatuses 100a, 100b, and 100c have, for example, the function of transmitting the information and the function of receiving and using the information in addition to the function of the information processing apparatus 100 of Embodiment 1 or 2, respectively. The information processing apparatuses 100a, 100b, and 100c are network televisions (netTV), and are installed in a living room, a bedroom, and a child room, respectively.

  In FIG. 13, information is broadcast from a certain device (for example, the information processing apparatus 100a) to other similar devices (for example, the information processing apparatuses 100b and 100c). As a result, even with other similar devices (for example, the same device in different rooms), it is possible to display search results and representative documents at high speed, and to select keywords on the search screen, using the information of the transmission source. It becomes like this. In one aspect, in the information processing system 500, information is transmitted and received between a plurality of information processing apparatuses, and the same type of information is used.

According to the third embodiment described above, the following effects (12) to (13) can be obtained in addition to the effects (1) to (11).
(12) The information processing apparatus transmits a search result or its storage location, a representative document or its storage location, keyword management information, and search screen display information to another information processing apparatus. Have For this reason, it becomes possible to use the information of the information processing apparatus of the transmission source in another information processing apparatus. As a result, it is possible to speed up the display of the search result page and the representative document by the information from the transmission source, the keyword automatic display function on the search screen, and the like in other information processing apparatuses. Become.

  (13) A function of receiving information from at least one information processing apparatus from another information processing apparatus, from among other information processing apparatuses, a search result or its storage location, a representative document or its storage location, keyword management information, and search screen display information Have For this reason, the information processing apparatus can use information of another information processing apparatus. As a result, the information processing apparatus can enjoy speeding up the display of search result pages and representative documents by using information from other information processing apparatuses, an automatic keyword display function on the search screen, and the like. It becomes.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can implement with a various aspect.

  1 local bus, 2a CPU, 2b ROM, 2c RAM, 3 antenna, 4 tuner unit, 5 demodulation LSI, 6 demultiplexer, 7 MPEG2 decoder, 8 HDD, 9 streaming reception processing unit, 10 DRM processing unit, 11 decryptor, 12 Web browser, 13 network interface, 14 backend unit, 14a program information acquisition unit, 14b keyword extraction unit, 14c access destination advance acquisition unit, 14d cache, 14e display control unit, 14f parser, 14g display information editing unit, 15 AV Output interface, 100, 100a, 100b, 100c information processing device, 200 video display device, 300 content server, 500 information processing system, N1, N2 network Click.

Claims (24)

Program information acquisition means for acquiring program information of a program viewed by a user;
Keyword extracting means for extracting keywords related to the program from the acquired program information;
Search result acquisition means for searching a document on the network with the extracted keyword and acquiring a search result;
Document acquisition means for acquiring a document on a representative network corresponding to the keyword from the acquired search results;
Storage control means for storing the acquired search results and representative documents in a storage means;
An information processing apparatus comprising:   The information processing apparatus according to claim 1, further comprising display control means for displaying a search result and a representative document stored in the storage means.   The display control unit displays a search result corresponding to the keyword stored in the storage unit when a user operation for searching a document on the network is performed by the keyword, and the keyword is stored on the network by the keyword. When a new search result is obtained by searching a document, and the newly acquired search result is different from the displayed search result, the newly acquired search result is used instead of the displayed search result. The information processing apparatus according to claim 2, wherein the information processing apparatus is displayed.   The display control unit displays the document stored in the storage unit when a user operation to access a document on a typical network corresponding to the keyword is performed, and newly displays the document from the network. The newly acquired document is displayed in place of the displayed document when the newly acquired document is different from the displayed document. The information processing apparatus described. The program information includes a plurality of items,
The keyword extraction means uses a weight assigned in advance to each item, weights the appearance of the keyword according to the item from which the keyword is extracted, and obtains an index value indicating the appearance degree of the keyword. 5. The information processing apparatus according to claim 1, wherein the information management apparatus calculates and generates keyword management information in which the keyword is associated with the index value. The program information includes type information indicating the type of program,
The keyword extraction means uses a weight previously assigned to each item for each type, and for the appearance of the keyword, extracts the type indicated by the type information of the program information from which the keyword is extracted, and the keyword The information processing apparatus according to claim 5, wherein the index value is calculated by performing weighting according to the item that has been set.   The information processing apparatus according to claim 6, wherein the type of the program is a sub-genre in a genre to which the program belongs. The program information further includes additional special characters,
The keyword extracting means uses a weight assigned in advance to each type of the additional special character, and for the appearance of the keyword, the type, the item, and the additional special character of the program information from which the keyword is extracted. The information processing apparatus according to claim 5, wherein the index value is calculated by performing weighting according to a type.   The information processing apparatus according to claim 5, wherein the keyword extraction unit sets a time limit for holding the keyword in the keyword management information for the keyword.   10. The information according to claim 1, wherein the storage control unit sets a time limit for holding the search result or document in the storage unit for the search result or the document. Processing equipment.   Edit display information for editing search screen display information used to display a search screen for searching documents on the network so that the extracted keyword can be selected as a search keyword on the search screen. The information processing apparatus according to claim 1, further comprising means.   Send or receive at least one of the search result or its storage location, the representative document or its storage location, the keyword management information, and the search screen display information to or from another information processing apparatus. The information processing apparatus according to claim 1, wherein the information processing apparatus is an information processing apparatus. A program information acquisition step of acquiring program information of a program viewed by the user;
A keyword extracting step of extracting a keyword related to the program from the acquired program information;
A search result acquisition step of searching a document on the network with the extracted keyword and acquiring a search result;
A document acquisition step of acquiring a document on a representative network corresponding to the keyword from the acquired search results;
A storage control step of storing the acquired search result and a representative document in a storage means;
An information processing method characterized by comprising:   The information processing method according to claim 13, further comprising a display control step of displaying a search result and a representative document stored in the storage unit.   In the display control step, when a user operation for searching a document on the network by the keyword is performed, a search result corresponding to the keyword stored in the storage unit is displayed, and the keyword is displayed on the network. When a new search result is obtained by searching a document, and the newly acquired search result is different from the displayed search result, the newly acquired search result is used instead of the displayed search result. The information processing method according to claim 14, wherein display is performed.   In the display control step, when a user operation to access a document on a representative network corresponding to the keyword is performed, the document stored in the storage unit is displayed, and the document is newly added from the network. The newly acquired document is displayed in place of the displayed document when the newly acquired document is different from the displayed document. Information processing step described. The program information includes a plurality of items,
In the keyword extracting step, an index value indicating the appearance degree of the keyword is obtained by using a weight assigned in advance to each item, weighting the appearance of the keyword according to the item from which the keyword is extracted. The information processing method according to any one of claims 13 to 16, wherein the keyword management information is calculated and associated with the keyword and its index value. The program information includes type information indicating the type of program,
In the keyword extraction step, weights previously assigned to the respective items are used for each type, and the type indicated by the type information of the program information from which the keyword is extracted and the keyword are extracted for the appearance of the keyword. The information processing method according to claim 17, wherein the index value is calculated by performing weighting according to the item that has been set.   The information processing method according to claim 18, wherein the type of the program is a sub-genre in a genre to which the program belongs. The program information further includes additional special characters,
In the keyword extraction step, the weight assigned in advance to each type of the additional special character is used, and for the appearance of the keyword, the type, the item, and the additional special character of the program information from which the keyword is extracted The information processing method according to claim 17, wherein the index value is calculated by performing weighting according to a type.   21. The information processing method according to claim 17, wherein, in the keyword extraction step, a time limit for retaining the keyword is set in the keyword management information for the keyword.   The information according to any one of claims 13 to 21, wherein, in the storage control step, a time limit for holding the search result or the document in the storage unit is set for the search result or the document. Processing method.   Edit display information for editing search screen display information used to display a search screen for searching documents on the network so that the extracted keyword can be selected as a search keyword on the search screen. The information processing method according to claim 13, further comprising a step.   The method further comprises the step of transmitting or receiving at least one of the search result or its storage location, the representative document or its storage location, the keyword management information, and the search screen display information. The information processing method according to any one of claims 13 to 23.

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