WO2007139105A1

WO2007139105A1 - Broadcast receiver, digest creating method, and digest creating program

Info

Publication number: WO2007139105A1
Application number: PCT/JP2007/060896
Authority: WO
Inventors: Toshiaki Tsuchiya; Reiji Iwase
Original assignee: Pioneer Corporation
Priority date: 2006-05-31
Filing date: 2007-05-29
Publication date: 2007-12-06

Abstract

A broadcast receiver for providing advertisement information matching the preference of an individual user included in digest data. The broadcast receiver comprises an advertisement searching section for searching an advertisement data segment having attribute information agreeing with viewer information and a digest creating section extracting data segments from a data stream according to segment information representing the contents of content data included in the data stream and combining the extracted data segments with the advertisement data segment acquired by the advertisement searching section so as to create digest data.

Description

Broadcast receiving apparatus, digest generation method, and digest generation program

TECHNICAL FIELD [0001] The present invention relates to a technique for generating digest data for data stream power such as a video stream and an audio stream, and in particular, a technique for generating data stream power digest data generated from a received television broadcast signal. About.

Background art

In recent years, recording apparatuses having a large-capacity recording medium such as a hard disk and an optical disk have become widespread. This type of recording device has a recording function for generating a data stream such as a video data stream and an audio data stream of a received television broadcast signal power broadcast program and recording the data stream on a large-capacity recording medium. In addition, in order to enable efficient search of recorded programs, development of a technique for automatically generating a digest of recorded programs by checking a data stream is underway. By using this digest data, the user can efficiently search for a desired program among many recorded programs while viewing the digest data. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2001-54071), Patent Document 2 (Japanese Patent Laid-Open No. 2006-066754), and Patent Document 3 (International Publication No. International Publication No. 2001-54071) are related to digest data generation methods. 2006Z011447 pamphlet).

[0003] Although the present inventors have developed a technique for including advertisement information in digest data, the advertisement information is received as part of a broadcast program and does not necessarily match the user's preference. It is not necessarily advertising information.

[0004] Therefore, a method of downloading advertisement data that matches the user's preference from an external information providing server and including it in the digest data is conceivable. However, this method has a problem that personal information on user preferences must be provided to the information providing server, and there may be viewers who do not feel comfortable providing personal information. Also, as the number of users of the information providing server increases, the processing load on the information providing server increases, so the information providing server can respond flexibly and quickly to changes in individual user preferences. There is also a problem of not.

[0005] For example, Patent Document 1 describes a set-top that supplies point information representing cuts and scenes of recorded programs to an external information providing server << (digest site) via a satellite line or a network line according to user preferences. A box is disclosed. This set-top box can access the information provider Sano (digest site), search digest information, and download the desired digest information. Send point information on user preferences to the information provider server (digest site) This must violate the user's privacy. Another problem is that the processing load on the information providing server (digest site) increases as the number of set-top boxes increases.

Patent Document 1: JP 2001-54071 A

Patent Document 2: Japanese Patent Laid-Open No. 2006-067564

Patent Document 3: International Publication No. 2006Z011447 Pamphlet (International Publication Pamphlet on PCT Application Based on Patent Application of Patent Document 2 Priority Claim)

Disclosure of the invention

In view of the above, an object of the present invention is to provide a broadcast receiving device, a digest generating method, and a digest generating program capable of providing advertisement information in accordance with the preference of individual users who use the receiving device. Is to provide.

[0007] A broadcast receiving apparatus according to a first aspect of the present invention is a broadcast receiving apparatus that receives a television broadcast signal, and a broadcast receiving unit that receives the television broadcast signal and generates a data stream; A first data recording unit for storing the data stream, a second data recording unit for recording an advertisement data segment representing advertisement information and attribute information of the advertisement data segment, and a viewer who uses the broadcast receiving apparatus A third data recording unit for recording viewer information on the advertisement, and an advertisement search unit for searching for an advertisement data segment having attribute information matching the viewer information with reference to the second and third data recording units And a plurality of data segments extracted based on the segment information indicating the content data content included in the data stream. And combining the extracted data segments with the advertisement data segments obtained by the advertisement search unit. And a digest generation unit that generates digest data.

[0008] A digest generation method according to a second aspect of the present invention includes a broadcast receiving unit that receives a television broadcast signal to generate a data stream, a first data recording unit that accumulates the data stream, and advertisement information A digest generating method in a broadcast receiving apparatus having a second data recording unit that records an advertisement data segment that represents and attribute information of the advertising data segment, and a third data recording unit that records viewer information (A) searching for an advertisement data segment having attribute information that matches the viewer information with reference to the second and third data recording sections, and (b) included in the data stream. (C) extracting a plurality of data segments from the data stream based on segment information indicating the content of the content data; Generating a digest data and obtained advertisement data segment by out more Detasegu instrument and the step was (a) synthesizing and, those having a.

A digest generation program according to a third aspect of the present invention includes a broadcast receiving unit that receives a television broadcast signal and generates a data stream, a first data recording unit that stores the data stream, and advertisement information This is executed in a broadcast receiving apparatus having a second data recording unit that records an advertisement data segment that represents and attribute information of the advertisement data segment, and a third data recording unit that records viewer information. A digest generation program for searching for an advertisement data segment having attribute information matching the viewer information with reference to the second and third data recording units, and the data stream Based on the segment information indicating the content of the content data contained in the! /, The data stream force extracts multiple data segments The processor executes a segment extraction process and a digest generation process for generating digest data by synthesizing the extracted data segments and the advertisement data segment obtained by the advertisement search process.

Brief Description of Drawings

[0010] FIG. 1 is a diagram schematically showing a digest generation system according to an embodiment of the present invention.

FIG. 2 is a functional block diagram showing an example of a schematic configuration of a broadcast receiving apparatus. [Fig. 3] Fig. 3 (A) is a schematic diagram showing a series of scenes (data segments), Fig. 3 (B) is a schematic diagram showing a series of digest scenes, and Fig. 3 (C) is It is the schematic which shows an advertisement data segment group.

FIG. 4 is a block diagram for explaining the operation of the broadcast receiving apparatus.

FIG. 5 is a schematic diagram for explaining a method of creating a search database.

Explanation of symbols

[0011] 1 Broadcast receiving apparatus

10 Anana

11 Broadcast receiver

12 Signal processor

13 Video / audio output section

14 System controller

15 Timekeeping section

16 memory

17 Input control section

18 Human interface 咅

19 Data storage unit

20 Network interface section

31 Advertising Search Department

32 Digest generator

34 Search database

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] Various embodiments of the present invention will be described below.

FIG. 1 is a diagram schematically showing a digest generation system according to an embodiment of the present invention. In this system, the television broadcast station 3 transmits a television broadcast signal to a large number of unspecified receivers via a wired transmission path or a wireless transmission path. Television broadcast signals can be digital broadcast signals or analog broadcast signals!

[0014] The television broadcasting station 3 provides the information providing station 2 with information on the content of the broadcast program. Yes. The information providing station 2 generates segment information based on the information provided from the television broadcasting station 3, and supplies this segment information to the broadcast receiving apparatus 1 via the communication network NW. This segment information will be described later. The information providing station 2 has a function of providing advertisement data to the broadcast receiving device 1. The communication network NW of the present embodiment is not limited to a wide area network (IP network) using the Internet 'protocol, but may be a LAN (Local Area Network) using any communication protocol.

FIG. 2 is a functional block diagram showing an example of a schematic configuration of the broadcast receiving apparatus 1. The broadcast receiving apparatus 1 includes a broadcast receiving unit 11, a signal processing unit 12, a video / audio output unit 13, a system controller 14, a data storage unit 19, and a network interface unit 20. These processing blocks 12, 13, 14, 19, 20 can transfer data signals and control signals to each other via the bus 22. The system controller 14 includes a microprocessor, ROM (Read Only Memory), RAM (Random Access Memory), an internal node, and an input / output interface. The process executed by the system controller 14 of the present embodiment may be executed by hardware, or may be executed by a microphone processor using a program. The system controller 14 can individually control the operations of all processing blocks in the broadcast receiving apparatus 1.

Furthermore, an input operation unit 17 is connected to the system controller 14 via an input interface unit 18. The input operation unit 17 includes an input key, a switch, or a pointing device for a user to input data. The input operation unit 17 is connected to the input interface unit 18 wirelessly or by wire. Data input by the input operation unit 17 is transferred to the system controller 14 via the input interface unit 18. The system controller 14 can control various operations in accordance with user input data.

The broadcast receiving unit 11 receives a television broadcast signal via the antenna 10 and supplies the received signal to the signal processing unit 12. For example, when the broadcast receiving unit 11 has a function of receiving a terrestrial digital broadcast signal, the broadcast receiving unit 11 selects a channel and receives a digital broadcast signal of the selected channel. The broadcast receiver 11 The digital broadcast signal is converted to an IF signal in the intermediate frequency band, and the IF signal is subjected to processing such as gain adjustment and AZD conversion. Further, the broadcast receiving unit 11 demodulates the OFDM modulated signal to generate a transport stream according to the MPEG-2 (ISOZIEC13818-1 compliant) standard, and supplies this stream to the signal processing unit 12. The broadcast receiving unit 11 may have a function of receiving a digital broadcast transmitted via a wide area network such as the Internet.

[0018] The signal processing unit 12 performs digital processing such as decoding on the received signal transferred from the broadcast receiving unit 11, and reproduces a video data stream and an audio data stream. The video data stream is transferred to the display 21D via the video / audio output unit 13 and displayed. Also, the audio data stream is transferred to the speaker 21S via the video / audio output unit 13 and output to the air medium. As a result, the user can view the content data. On the other hand, the system controller 14 can transfer the data stream from the signal processing unit 12 to the data storage unit 19 via the bus 22 and store the data stream in the data storage unit 19. Conversely, the system controller 14 can read video data and audio data from the data storage unit 19 and transfer them to the signal processing unit 12 via the bus 22 for viewing by the user.

The data storage unit 19 records data on a large-capacity recording medium (not shown) such as a hard disk or an optical disk, or reads the recorded data to other processing blocks according to the control of the system controller 14. It has a drive device that can transfer. The data storage unit 19 can constitute the “first data recording unit” of the present invention, but is not limited thereto.

[0020] The playback controller 14A of the system controller 14 has a function of controlling the playback speed of the video data stream and the audio data stream. The user operates the input operation unit 17 so that the playback speed is either normal playback speed, fast-forward speed, slow playback speed (slower than normal playback speed, speed), or pause speed. The playback control unit 17A can be instructed to perform control as follows.

The broadcast receiving apparatus 1 is connected to a communication network NW via a network interface unit 20. As described above, the information providing station 2 shown in FIG. When the advertising data is transmitted to the broadcast receiving device 1, the network interface unit 20 receives the advertising data and the segment information from the information providing station 2. The system controller 14 transfers the advertisement data of the received information to the data storage unit 19 for recording. The ability of the data storage unit 19 to constitute the “second data recording unit” of the present invention is not limited thereto. In addition, the system controller 14 causes the segment information of the received information to be transferred to itself, and stores the transferred segment information in the memory 16.

As described above, the data storage unit 19 has a drive device that records data on a large-capacity recording medium such as an optical disk or reads the recorded data. The advertisement data may be provided in a pre-recorded state on a package medium that is a large-capacity recording medium. Examples of package media include ROM type discs such as CD (Compact Disc), DVD (Digital Versa tile Disc), and BD (Blu-ray Dis registered trademark). The “second data recording unit” of the present invention can also be configured by this package medium.

[0023] The advertisement data is composed of video data, audio data, character data, or the like.

Attribute information (metadata) indicating the contents of the advertisement data is added to the advertisement data and recorded in the data storage unit 19 together with the advertisement data. Table 1 below shows an example of the contents of attribute information of advertisement data.

[0024] [Table 1]

ID number

Company name

Product name

Character's age

The gender of the person

Income

Family structure Number of family members

Age of family 1

Family 1 sex

Age of family 2

Family 2 sex

Age of family 3

Family 3 sex

• · ·

Hobby movie

Travel

• '-

• · * • '·

[0025] In Table 1 above, “ID number” is a number that identifies advertising data, “company name J is the name of the company that sponsors the advertising data, and“ product name ”is related to the advertising data. Each product or service name. Further, in the “feature” column of Table 1, information indicating the characteristics of the virtual viewer as a target (target) is stored. In this “Characteristic” column, the “person's age” is the virtual viewer's age, the “person's gender” is the virtual viewer's gender, and the “income” is the virtual viewer's annual income. The range and “family structure” columns represent the family structure of the virtual viewer. In the “Family Composition” column, “Age of Family 1”, “Age of Family 2”,... Represent information of a family member of a virtual viewer. In the “hobby” column, information on the hobby of the virtual viewer is stored.

[0026] By the way, the video data stream is composed of a series of scenes (data segments) SI, S2, S3, S4, S5,... That are temporally continuous as shown in FIG. . The segment information is information that specifies all or part of these scenes. Table 2 below shows the segment information that identifies the scenes S1, S3, S5 used for the generation of the digi soot data among the scene series SI, S2, S3, S4, S5, ... shown in Fig. 3 (A). The contents of

[0027] [Table 2] Data segment Start time Time length Scene content

S 1 T 1 L 1 x x 1

S 3 Τ 2 L 2 x x 2

S 5 Τ 3 L 3 x x 3

[0028] According to Table 2, the scene S1 has a time length L1 from the start time T1, and has data expressed by the keyword "xxl". The scene S3 has a time length from the start time T2. Data having contents expressed by the keyword `` xx2 '' having L2, scene S5 is data having a time length L3 from the start time T3 and having contents expressed by the keyword `` xx3 '', Respectively. The number of keywords expressing the contents of each scene is not limited to one, but may be two or more.

[0029] Further, the user of the broadcast receiving apparatus 1 can input his / her personal information (viewer information) by operating the input operation unit 17 of FIG. This personal information is a system controller 1

4 is stored in the memory 16 and used when retrieving advertisement data. The personal information is composed of a combination of keywords representing contents such as “age”, “gender”, “profession”, “income”, “family composition”, and “hobby” regarding the user.

FIG. 4 is a block diagram for explaining the operation of the broadcast receiving apparatus 1. The advertisement search unit 31 and the digest generation unit 32 are a part of the functions of the system controller 14 shown in FIG. The advertisement search unit 31 refers to the memory 16 in which the viewer information U1 is stored and the data storage unit 19 in which the advertisement data segments A1 to A10 and the corresponding attribute information M1 to M10 are stored. U1 is compared with each of the attribute information M1 to M10 to search for an advertisement data segment having attribute information that matches the viewer information U1. Specifically, the keyword group constituting the viewer information U1 is compared with the keyword group constituting each of the attribute information M1 to M10. Based on this result, the advertisement search unit 31 preferentially selects an advertisement data segment having attribute information including a keyword having a high matching rate.

Next, the digest generation unit 32 generates digest data by combining the advertisement data segment selected by the advertisement search unit 31 and the data segment specified by the segment information. For example, when ad data segment A2 is selected, data segment Sl, ad data segment A2, and data segment S3 are displayed as shown in FIGS. 3 (A) to 3 (C). , S5 can be synthesized to generate digest data. The digest data may be stored in the data storage unit 19 or may be transferred to the video / audio output unit 13 for viewing.

[0032] Note that the advertisement search unit 31 sets the time length of the advertisement data segment according to the time length of the digest data, and selects one or a plurality of advertisement data segments so as to be within the set time length. It is desirable. This is because it is unnatural that the time length of the entire advertising data segment is too large. For example, if you want to generate 1 hour of digest data from a 2 hour recorded program data stream, set the total length of the ad data segment to 6 minutes, and 20 minutes of digest from the recorded program data stream. If you are trying to generate data, you can set the overall length of the ad data segment to 2 minutes.

As shown in FIG. 2, the system controller 14 is supplied with time data representing the current time from the time measuring unit 15. The advertisement search unit 31 refers to this time data as necessary, and based on the time when the digest data should be generated or played back (that is, the digest data generation time or the scheduled playback time!) It has a function to limit the search range of the advertisement data segment. For example, the advertisement search unit 31 may include attribute information related to a time zone (morning, noon or night) to which the digest data generation time or playback scheduled time belongs (for example, information for housewives related to the morning time zone, Alternatively, it may have a function to limit the search range to advertisement data segments that have information for adults related to the night time period, or the season (spring) where the digest data generation time or scheduled playback time belongs. , Summer, autumn or winter), may have the ability to limit the search scope to ad data segments with attribute information.

[0034] As described above, the digest generation method of the present embodiment selects an advertisement data segment having attribute information that matches the viewer information U1 input by the user of the broadcast receiving apparatus 1 and uses this as digest data. Can be included. Since the user can easily set the viewer information U1 according to his / her preference by operating the input operation unit 17, the user can view the advertisement data according to his / her preference through the digest data. Therefore, it is possible to achieve a high advertising effect. [0035] Further, since information regarding user preferences is not transmitted to the outside, it is possible to view advertisement data according to user preferences while keeping personal information confidential. However, the system controller 14 may transmit information indicating the frequency of use of each advertisement data segment to the information providing station 2 in FIG. 1 via the network interface unit 20. This is because the information providing station 2 can obtain advertising revenue according to the frequency of use from the advertiser (sponsor).

Next, search processing using the search database 34 shown in FIG. 4 will be described.

FIG. 5 is a schematic diagram for explaining a method for creating the search database 34. This search database 34 is created based on the history of changes in the playback speed of the data stream. As described above, the user operates the input operation unit 17 to change the data stream playback speed to the normal playback speed, fast forward speed, slow playback speed (slower than the normal playback speed), or pause speed. Can be set to either. For example, if the playback speed is switched from the normal playback speed to the fast-forward speed, the user is less interested in the video and audio that the user views, and if the playback speed is switched from the fast-forward speed to the normal playback speed, the user views it. It is estimated that interest in video and audio is high.

[0037] When the playback speed of the data stream is switched to a predetermined first speed force or a predetermined second speed in response to an input operation by the user, the system controller 14 falls within a set range including the current playback position. If any of the above data segments exists, it has a function (search database creation unit 33) that creates a search database 34 by extracting keywords that appear in the segment information related to the data segment as search keywords. is doing.

[0038] Specifically, according to the input operation by the user, the playback speed is changed from “fast forward speed” to “normal playback speed”, “normal playback speed” to “slow playback speed”, “normal playback speed”. The current playback position of the data stream when it is switched from "Speed" to "Pause speed", "Fast forward speed" to "Slow playback speed", or "Fast forward speed" to "Pause speed". It is determined whether or not any of the data segments exists within the setting range including. For example, referring to Figure 5, the playback speed is changed from fast forward speed to normal playback speed. The search database creation unit 33 has the start position Ta of the scene (data segment) Sa within the set range (the range from Ts—ΔΤ to Ts + ΔΤ) including the playback position Ts at that time. It is determined whether or not to do. In the example of FIG. 5, since the head position Ta exists within the set range (range from Ts ΔΤ to Ts + ΔΤ), it is determined that the data segment Sa is a scene that matches the user's preference. Further, referring to FIG. 5, when the playback speed is switched from the normal playback speed or the fast-forward speed to the slow playback speed, the search database creation unit 33 sets the setting range (再生 ρ-ΔΤ including the playback position Tp at that time. To Τρ + ΔΤ), it is determined whether or not the scene (data segment) Sa exists. In the example of FIG. 5, since the scene Sa exists within the set range (range from Τρ-ΔΤ to Τρ + ΔΤ), the data segment Sa is determined to be a scene that matches the user's preference.

[0039] As described above, when a data segment exists within the set range, the search database creation unit 33 extracts a keyword related to the data segment as a search keyword. For example, in Table 2 above, the keyword “xxl” is associated with scene S1, which is a data segment, so if it is determined that this scene S 1 is a scene that matches the user's preference, The keyword “xxl” can be extracted as a search keyword.

Then, the search database creation unit 33 records the appearance frequency of the search keyword in the search database 34. Table 3 below schematically shows an example of the contents of the search database 34.

[0041] [Table 3]

[0042] In Table 3, the appearance frequency is high !, the higher the keyword is, the higher the ranking is assigned! /. The advertisement search unit 31 refers to the search database 34 and prioritizes an advertisement database segment having attribute information including a search keyword having a high appearance frequency among search keywords. Can be selected. In this way, advertisement data that matches the user's preference can be included in the digest data based on the user's behavior history, so that even higher advertising effects can be realized.

Claims

The scope of the claims

[1] A broadcast receiving device for receiving a television broadcast signal,

A broadcast receiving unit that receives the television broadcast signal and generates a data stream; a first data recording unit that stores the data stream;

A second data recording unit for recording an advertisement data segment representing advertisement information and attribute information of the advertisement data segment;

A third data recording unit for recording viewer information relating to viewers using the broadcast receiving device;

An advertisement search unit for searching for an advertisement data segment having attribute information matching the viewer information with reference to the second and third data recording units;

The data stream power extracts a plurality of data segments based on segment information indicating the content data content included in the data stream, and the extracted data segments and the advertisement data obtained by the advertisement search unit A digest generator that combines segments and generates digest data;

A broadcast receiving apparatus comprising:

2. The broadcast receiving device according to claim 1, further comprising a segment information receiving unit that receives the segment information via an external information providing station via a communication network.

3. The broadcast receiving apparatus according to claim 2, wherein the communication network is a communication network based on an Internet protocol.

[4] The broadcast receiving device according to any one of claims 1 to 3, wherein the advertisement search unit sets a time length of the advertisement data segment according to a time length of the digest data. And selecting an advertisement data segment that fits within the set time length.

[5] The broadcast receiving device according to any one of claims 1 to 4, wherein the advertisement search unit is configured to generate the advertisement data segment based on a time at which the digest data is to be generated or reproduced. A broadcast receiving apparatus characterized by limiting the search range.

6. The broadcast receiving device according to claim 5, wherein the advertisement search unit is the digest data. A transmission / reception apparatus having a function of limiting the search range to a set of advertisement data segments having attribute information related to a time zone to which a time at which data should be generated or reproduced belongs.

[7] The broadcast receiving device according to claim 5, wherein the advertisement search unit adds the advertisement data segment to a set of advertisement data segments having attribute information related to a time to which the time when the digest data should be generated or reproduced belongs. A broadcast receiver characterized by having a function to limit a search range.

[8] The broadcast receiving device according to any one of claims 1 to 7,

A signal processing unit for reproducing the data stream from the recording data of the first data recording unit;

A playback control unit for controlling the playback speed of the data stream;

When the playback speed of the data stream is switched from a predetermined first speed to a predetermined second speed by the playback control unit, one of the data segments exists within a set range including the current playback position. A search database creation unit that extracts keywords that sometimes appear in the segment information of the data segment as search keywords,

The transmission / reception apparatus characterized in that the advertisement search unit preferentially selects an advertisement data segment having attribute information including a search keyword having a high appearance frequency among the search keywords.

[9] The broadcast receiving device according to claim 8, wherein the first speed is a fast-forward speed,

A broadcast receiver characterized in that the 2 speed is a normal playback speed.

[10] The broadcast receiving device according to claim 8, wherein the first speed is a normal playback speed or a fast-forward speed, and the second speed is a speed slower than a normal playback speed or a pause speed. There is a broadcast receiving apparatus.

[11] The broadcast receiving device according to any one of claims 1 to 10, wherein the second data recording unit records information on a large-capacity recording medium or stores the recorded information. A broadcast receiving apparatus comprising a drive unit for reading.

12. The broadcast receiving device according to claim 11, wherein the large-capacity recording medium is a hard disk.

13. The broadcast receiving device according to claim 11, wherein the large-capacity recording medium is an optical disc.

[14] A broadcast receiving unit that receives a television broadcast signal to generate a data stream, a first data recording unit that stores the data stream, an advertisement data segment representing advertisement information, and the advertisement data segment A digest generating method in a broadcast receiving apparatus having a second data recording unit for recording the attribute information and a third data recording unit for recording viewer information,

(a) searching for an advertisement data segment having attribute information matching the viewer information with reference to the second and third data recording units;

(b) extracting a plurality of data segments based on the segment information indicating the content of content data included in the data stream; and

(c) combining the plurality of extracted data segments with the advertisement data segment obtained in step (a) to generate digest data;

A digest generation method comprising:

[15] A broadcast receiving unit that receives a television broadcast signal and generates a data stream, a first data recording unit that stores the data stream, an advertisement data segment representing advertisement information, and the advertisement data segment A digest generation program that is executed in a broadcast receiving device having a second data recording unit that records the attribute information of the viewer and a third data recording unit that records the viewer information,

An advertisement search process for searching for an advertisement data segment having attribute information matching the viewer information with reference to the second and third data recording units;

Segment extraction processing for extracting a plurality of data segments based on the segment information indicating the content data content included in the data stream;

A digest generation process for generating digest data by combining the plurality of extracted data segments and the advertisement data segment obtained by the advertisement search process; A digest generation program characterized by causing a processor to execute.