JP5519332B2 - Audience rating survey system, content server, client terminal, and audience rating survey method - Google Patents

Description

  The present invention relates to an audience rating survey system for collecting audience rating information and content for broadcasting content data from a content server to an information terminal through a communication network constructed by connecting communication lines such as the Internet. The present invention relates to a server, a client terminal, and an audience rating survey method.

  2. Description of the Related Art Conventionally, a so-called audience rating survey service has been performed in which viewing information is collected for a television broadcast that is received and viewed by a television receiver. Here, the broadcast targeted for the audience rating survey is a terrestrial broadcast or a BS / CS broadcast that is viewed by the television receiver. For this audience rating survey, for example, it is connected to the television receiver. There are audience rating survey methods that use measuring instruments such as people meters and online meters, and audience rating survey methods that collect diary questionnaires.

  By the way, these audience rating survey methods calculate the audience rating by making a survey request to the specified household and collecting the collected survey results, but the measuring instrument is a dedicated terminal. There is a problem that the number of households to be surveyed is very small due to the fact that they are very expensive.

  There exists a technique of patent document 1 as a technique with respect to such a problem. With the technology disclosed in Patent Document 1, it is not necessary to use a dedicated terminal for collecting viewing history, taking advantage of the characteristics of digital broadcasting broadcast instead of analog broadcasting, and a relatively large number of viewing households and viewers are investigated. Can be easily targeted.

JP 2007-312070 A

  However, in recent years, content broadcasting that distributes content data related to programs broadcast by each broadcasting station through radio waves is becoming widespread, and the audience rating survey method described in Patent Document 1 is a so-called television. Broadcasting (terrestrial broadcasting, BS / CS broadcasting) is the main research target, so viewing information cannot be collected from users who view TV programs through content broadcasting. There is a problem of lack of accuracy.

  On the other hand, in the audience rating survey by content broadcasting, the time at which the server transmits the content data and the time at which the client reproduces the content data depend on the communication delay of the communication line and the situation of the playback device of the client device. There is a problem that a reproduction delay that causes a difference between the actual distribution time and the reproduction time occurs for each person, and therefore, there is a problem that a detailed survey result on the time axis of program progress cannot be collected. In particular, in a content broadcast distribution method, a broadcast video distribution method using P2P technology that shares fragmented content data among a large number of client devices may be employed. It is important to solve these problems because reproduction delay is likely to occur during distribution.

  Therefore, the present invention has been made in view of the above points. In the collection of viewing information for content broadcasting using the Internet line, the time when the broadcasted program is actually viewed by a general viewer is collected. It is an object of the present invention to provide an audience rating survey system, a content server, a client terminal, and an audience rating survey method capable of collecting viewing information corresponding to the progress time in a program. Also, by linking these with the main broadcast, to provide an audience rating survey system, a content server, a client terminal, and an audience rating survey method that are accurate in time such as simultaneous broadcasting using broadcasting infrastructure and communication infrastructure. Is the subject.

In order to solve the above problems, the present invention relates to an audience rating survey system that distributes content data from a content server to a client terminal through a communication network constructed by connecting communication lines to each other and investigates the audience rating. The content server includes a timeline insertion unit that inserts a timeline indicating the elapsed time of distribution of content data into the content data, and a data transmission unit that distributes the content data with the timeline inserted through the communication network. And the time difference between the time of the radio broadcast in the radio broadcast unit and the data distribution by the data transmission unit provided in the radio broadcast unit for transmitting broadcast data having the same content as the content data via the radio wave and the timeline insertion unit Measure the time difference between radio broadcast and streaming delivery The client terminal is provided with a function for recording in association with the IN, and the client terminal detects and monitors the receiving unit for receiving the content data, the reproducing unit for reproducing the content data, and the timeline in accordance with the reproduction of the content data by the reproducing unit. Based on the timeline detected by the timeline monitoring unit, the log recording unit for recording the reproduction history by the timeline and the reproduction unit in the log information, and the log information recorded by the log recording unit are transmitted. Log transmission unit for receiving log information from the transmission unit on the communication network, and storing log information by associating the reception time of the log information with the timeline recorded in the log information parts are arranged, the log collecting unit, a time difference, in correspondence with the log information reception time, in association with the collected log information serial And, the data transmission unit distributes the content data in synchronism with the delivery of the broadcast data by the radio broadcast unit.

Another invention is an audience rating survey method for distributing content data from a content server to a client terminal through a communication network constructed by connecting communication lines to each other, and surveying the audience rating.
(1) In the content server, a data transmission step of inserting a timeline indicating an elapsed time on the delivery side of the content data into the content data, and distributing the content data with the inserted timeline through the communication network; and (2) a client terminal A step of receiving content data and reproducing the content data;
(3) a timeline monitoring step for detecting and monitoring a timeline in accordance with the reproduction of content data;
(4) Based on the timeline detected by the timeline monitoring step, a log recording step for recording the reproduction history by the timeline and the reproduction step in the log information;
(5) a log transmission step for transmitting log information recorded in the log recording step;
(6) a log collection step for receiving log information from the client terminal on the communication network and storing the log information by associating the reception time of the log information with the timeline recorded in the log information;
The content server is connected to a radio broadcast unit that transmits broadcast data having the same content as the content data via radio waves. In the distribution step, the content data is distributed in synchronization with the broadcast data transmitted by the radio broadcast unit. In the data transmission step, the time difference between the radio broadcast time in the radio broadcast unit and the content data delivery is measured, and the time difference between the radio broadcast and the streaming delivery is recorded in association with the timeline. Is associated with the collected log information in association with the log information reception time .

According to these inventions, on the client (viewer) side who receives and views the content data by embedding the timeline, which is information serving as an index of the delivery side elapsed time, in the content data distributed through the communication network. By monitoring the timeline and recording the playback history such as the viewing time viewed by the user as log information based on the timeline that is the elapsed time on the delivery side, due to communication delay between the content server and the client terminal Even when there is a time difference between the streaming delivery time on the content server side and the viewing time on the client device side, it is possible to obtain viewing information at the progress time viewed by the user. The delivery side elapsed time is, for example, content data in a streaming format that requires a certain length of time for reproduction, such as video data or audio data, at a processing speed equivalent to the reproduction speed of the content data. This is the elapsed time when the current time is stamped and transmitted. Specifically, for example, in so-called simulcast where content having the same content as radio broadcast is streamed simultaneously through a communication network in synchronization with this radio broadcast, the broadcast elapsed time (broadcast time) of radio broadcast is There is a case where the delivery side elapsed time is engraved in the content, and the content is delivered simultaneously in synchronization with the radio broadcast. In addition, since it further includes a radio wave broadcasting unit that transmits broadcast data having the same content as the content data via radio waves, and the data transmission unit distributes the content data in synchronization with the transmission of the broadcast data by the radio wave broadcasting unit. By synchronizing content broadcast in one direction via radio waves with content distribution via a communication network such as the Internet that can benefit from two-way communication, the characteristics of radio broadcast and two-way communication through the communication network It is possible to develop services that combine the characteristics of

  Further, in the present invention, since the acquired log information is stored in association with the reception time of the log information that is the actual time, the actual time information that the user was watching is also acquired and the content progress time is obtained. The corresponding viewing information can be combined with the existing viewing situation, and more detailed and accurate audience rating information can be collected.

  In the above invention, the client terminal further includes a user operation acquisition unit that acquires a user's selection operation at the time of reproduction of the content data, and the log recording unit performs the user operation acquired by the user operation acquisition unit as a time The log collection unit preferably records the log information in association with the line, and the log collection unit accumulates the log information by associating the time line included in the log information received from the client terminal with the user operation. In this case, by collecting the log of selection operations that reflect the user's intention, it is possible to investigate what the user was watching the content data while applying it, and applying the collected results Therefore, it is possible to distribute contents in accordance with user viewing trends.

  In the above invention, the client terminal further includes a position information acquisition unit that acquires the current position of the own device, and the log recording unit associates the current position acquired by the position information acquisition unit with the time line as position information. Preferably, the log collection unit accumulates the log information by associating the time line included in the log information received from the client terminal with the position information. In this case, by collecting the user's viewing information log for each region, the user can view the content data where and when the user can view the regional characteristics of viewing trends and mobile devices while moving. It is possible to investigate as much as possible, and by applying the collected results, it is possible to distribute contents according to regional characteristics and user trends, and to collect audience marketing data.

  In the above audience rating survey system and audience rating survey method, a content server and a client terminal according to other inventions as described below can be used.

(Content server)
That is, according to the present invention, a content server having a function of distributing content data to client terminals through a communication network constructed by connecting communication lines to each other and examining the audience rating is provided on the content data distribution side. A timeline indicating the elapsed time is detected by the timeline insertion unit that inserts the content data into the content data, the data transmission unit that distributes the content data with the timeline inserted through the communication network, and the client terminal as the content data is reproduced A log information receiving unit that receives log information in which a reproduction history of the timeline and content data is recorded based on the recorded timeline; and a log information reception time associated with the timeline recorded in the log information and the log collection unit for storing the information, content Day The broadcast data of the same content is provided in the radio broadcast unit that sends out via radio waves and the timeline insertion unit, and the time difference between the radio broadcast time in the radio broadcast unit and the data distribution by the data transmission unit is measured, It has a function to record the time difference between radio broadcast and streaming distribution in association with the timeline , and the log collection unit records the time difference in association with the log information reception time in association with the collected log information, and transmits the data. The unit distributes content data in synchronization with transmission of broadcast data by the radio wave broadcasting unit.

According to such an invention, the timeline is embedded as information serving as an index of the distribution-side elapsed time at regular intervals in content data such as a video that is simulcasted like a television broadcast, and the client (viewer) side embeds the timeline. Since the timeline is monitored and the playback history such as the viewing time viewed by the user is recorded as log information based on the timeline, streaming distribution on the content server side due to communication delay between the content server and the client terminal Even when there is a time difference between the time and the viewing time on the client device side, it is possible to obtain viewing information at the progress time actually viewed by the user. In addition, the log collection unit accumulates log information by associating the time line included in the log information received from the client terminal with the position information, and therefore collects the viewing information log of the user for each region, and the collection result By applying, content distribution reflecting regional characteristics can be performed.

  In the present invention, since the acquired log information is stored in association with the reception time of the log information that is the actual time, the actual time information that the user watched is also acquired, so the content progress time The corresponding viewing information can be combined with the existing viewing situation, and more detailed and accurate audience rating information can be collected. Specifically, for example, when a scene delivered at an actual time of 12:15:00 is viewed at 12:16:00, a user who has viewed the 12:15:00 scene at 12:16:00 In addition to acquiring the number, the number of viewers viewing at the time of 12:15:00 is acquired. Thereby, more detailed and accurate audience rating information of the content data can be collected.

  In the above invention, it is preferable that the log collection unit accumulates the log information by associating a timeline included in the log information received from the client terminal with a user operation. In this case, by collecting logs of selection operations that reflect the user's intention and applying the collected results, it is possible to distribute content that matches the viewing trends of the user.

  Furthermore, in the above invention, it is preferable that the log collection unit accumulates the log information by associating the time line included in the log information received from the client terminal with the position information. In this case, it is possible to distribute contents reflecting regional characteristics by collecting logs of user viewing information for each region and applying the collected results.

(Client terminal)
On the other hand, a client terminal having a function of receiving distribution of content data from a content server through a communication network constructed by connecting communication lines to each other includes a receiving unit that receives the content data, and a playback unit that reproduces the content data And a timeline monitoring unit that detects and monitors a timeline indicating the content data delivery side elapsed time inserted in the content data in the content server in accordance with the playback of the content data by the playback unit, and a timeline monitoring unit And a log recording unit that records the history of reproduction by the timeline and the reproduction unit in log information, and a log transmission unit that transmits the log information recorded by the log recording unit.

  According to such an invention, the timeline is embedded as information serving as an index of the distribution-side elapsed time at regular intervals in content data such as a video that is simulcasted like a television broadcast, and the client (viewer) side embeds the timeline. Since the timeline is monitored and the playback history such as the viewing time viewed by the user is recorded as log information based on the timeline, streaming distribution on the content server side due to communication delay between the content server and the client terminal Even when there is a time difference between the time and the viewing time on the client device side, it is possible to obtain viewing information at the progress time actually viewed by the user.

  In the above invention, the client terminal further includes a user operation acquisition unit that acquires a selection operation by a user at the time of reproduction of the content data, and the log recording unit displays the user operation acquired by the user operation acquisition unit as a timeline. It is preferable to record it in log information in association with. In this case, by collecting logs of selection operations that reflect the user's intention and applying the collected results, it is possible to distribute content that matches the viewing trends of the user.

  Furthermore, in the above invention, the client terminal further includes a position information acquisition unit that acquires the current position of the own device, and the log recording unit associates the current position acquired by the position information acquisition unit with the time line as position information. It is preferable to record the log information. In this case, it is possible to distribute contents reflecting regional characteristics by collecting logs of user viewing information for each region and applying the collected results.

  As described above, according to the present invention, in the collection of viewing information for a content broadcast using the Internet line, the viewing information corresponding to the actual viewing time for the program broadcast and the content progress time is collected, and the existing viewing is collected. By combining with the rate survey result, more detailed and accurate audience rating information can be collected.

It is a block diagram which shows schematic structure of the audience rating investigation system which concerns on embodiment. It is explanatory drawing which shows the outline | summary of the audience rating investigation method which concerns on embodiment. It is a block diagram which shows the internal structure of the broadcast station and content server which comprise the audience rating survey system which concerns on embodiment. It is a block diagram which shows the internal structure of the information terminal which comprises the audience rating survey system which concerns on embodiment. It is a block diagram which shows the internal structure of the browser part of the information terminal which comprises the audience rating survey system which concerns on embodiment. It is explanatory drawing which shows the operation | movement at the time of the timeline monitoring in the audience rating investigation system which concerns on embodiment. It is a flowchart figure which shows operation | movement of the audience rating investigation system which concerns on embodiment.

(Outline of audience rating survey system and survey method)
Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an audience rating survey system according to the present embodiment.

  As shown in FIG. 1, the audience rating survey system according to the present embodiment is a system for surveying viewing information of content data that is a broadcast program distributed from a broadcast station 200 or a content server. In so-called simulcasting, in which content having the same content as radio broadcast is simultaneously streamed through the communication network in synchronization with the radio broadcast, the audience rating regarding the content via the communication network is investigated. That is, in this embodiment, broadcast data is broadcast from the broadcasting station 200 to the television receiver 1 and the information terminal 2a through radio waves such as ground waves from the radio tower 3b and satellite radio waves from the communication satellite 4 and the parabolic antenna 3a. Then, to the information terminals 2b to 2f, the content data having the same content as the program broadcast on the broadcast station 200 is distributed from the content server 100 through the Internet 5 in synchronization with the transmission of the broadcast data at the broadcast station 200. To do.

  In the present embodiment, the Internet 5 is a form of a communication network constructed by connecting communication lines to each other. For example, various communication lines (telephone lines, ISDN lines, ADSLs) using the communication protocol TCP / IP are used. This is a distributed IP network constructed by interconnecting public lines such as lines and optical lines, dedicated lines, and wireless communication networks. The Internet 5 includes a LAN such as an intranet (company network) or a home network based on 10BASE-T or 100BASE-TX.

  The television receiver 1 is an information terminal that receives analog broadcasting or digital broadcasting using terrestrial or satellite radio waves through the receiving antenna 3 or a cable line, and outputs video and audio. Can also receive and output data broadcasts. The information terminal 2a is connected to a broadcast signal receiving device 9 that is an adapter device, and the broadcast signal receiving device 9 broadcasts a program (for example, one-segment broadcasting) from the broadcasting station 200 via radio waves. Program) broadcast signal can be received and displayed on the information terminal 2a.

  The radio base station 6 is an apparatus that is connected to the Internet 5 through the gateway device 7 and establishes a radio communication connection between the information terminal 2 and the radio base station 6 and provides a call and data communication by the information terminal 2. . The radio base station 6 may be, for example, a small-scale femtocell base station called a femtocell, which covers a narrow area with a radius of about 10 m. In this case, the radio base station 6 is connected to an HSS (Home Subscriber Server) on the network through a communication network such as an optical fiber as a backbone, a public network such as ADSL, or an IP network (not shown). .

  The HSS is a server that manages in which cell each mobile terminal is located, and serves as a location information acquisition unit. Specifically, the HSS receives the location registration request transmitted from the information terminal 2 together with the base station identification information assigned to the femtocell base station, and specifies the location of the information terminal 2. This location registration request is transmitted from the information terminal 2 to a femtocell base station that manages a cell that is newly located when this cell is switched due to a user's movement or the like. The base station identification information assigned to the femtocell base station is transmitted to the HSS together with the location registration request, and the location of the user can be grasped in real time in the HSS.

  The information terminals 2 (2a to 2f) are client terminals having a calculation processing function by a CPU and a communication processing function by a communication interface, and are realized by a general-purpose computer such as a personal computer or a dedicated device specialized in functions. Mobile computers, PDAs (Personal Digital Assistance), and mobile phones. The information terminal 2 also has a browser function for accessing the Internet 5 and transmitting / receiving data. This browser function is application software for browsing Web pages, downloads HTML (HyperText Markup Language) files, image files, music files, etc. from the Internet 5, analyzes the layout, and displays / reproduces them. It is also possible for a user to transmit data to a Web server using a form, or to operate application software written in JavaScript (Java is a registered trademark), Flash, Java, or the like. Further, in the present embodiment, the information terminal 2 has a function of receiving distribution of content data from the content server 100 through the Internet or the like, and also has a function of executing an application for viewing the content data.

  Here, functions of the information terminal 2 for each device will be described. The information terminals 2b and 2c are portable telephones using wireless communication, and a relay point such as a base station and a portable telephone communicate wirelessly and receive communication services such as calls and data communications while moving. it can. Examples of the communication system of the information terminals 2b and 2c include an FDMA system, a TDMA system, a CDMA system, a W-CDMA, a PHS (Personal Handyphone System) system, and the like. The information terminals 2b and 2c are equipped with functions such as a digital camera function, an application software execution function, or a GPS function, and also function as a personal digital assistant (PDA).

  Similar to the information terminals 2b and 2c, the information terminal 2a is a portable telephone using wireless communication. In particular, in the present embodiment, the information terminal 2a receives a broadcast signal for receiving a broadcast signal of a program broadcast by a broadcasting station 200 such as a television (TV) broadcast or a radio broadcast (for example, a one-segment broadcast program). A device 9 is connected. Here, “one-segment broadcasting” means terrestrial digital broadcasting for portable devices such as portable communication terminals. The broadcast signal receiving device 9 is a dedicated device that receives a broadcast signal of a program broadcast by the broadcast station 200, encodes the received broadcast signal, and can be viewed on the information terminal 2a. The broadcast signal receiving device 9 adds a function for receiving and viewing broadcast radio waves to the information terminal 2a.

  The information terminals 2d to 2f are general-purpose computers such as personal computers, and a function of receiving and viewing content data through a communication network is realized by a communication function and browser software. In particular, in the present embodiment, the information terminals 2d to 2f share content data downloaded by any information terminal with other information terminals by a so-called OLM (OverLay Multicast) peer-to-peer network system, It has a function of mutually delivering content data between distributed information terminals.

  The content server 100 includes a plurality of server device groups, and the functions of each server device are realized by a server computer that executes various information processing or software having the functions. In particular, the content server 100 according to the present embodiment has a function of distributing content data to the information terminal 2 through an IP network such as the Internet 5 in response to a request from client software such as a web browser, and viewing of the content data. With the ability to investigate rates. Specifically, in the present embodiment, the content server 100 includes a plurality of servers such as a content distribution server 110, a log information collection server 120, and a log analysis server 130 as shown in FIG. It is comprised by the apparatus.

  Then, the content data broadcast (distributed) from the content server 100 in this embodiment is provided to the user according to the procedure shown in FIG. 2, and the viewing information is collected.

  First, the content data D1 created or obtained by the Internet broadcaster 11 is submitted (stored) to the content distribution server 110 operated by the Internet distributor 12. Here, the Internet broadcaster 11 is, for example, the broadcast station 200, and the content data D1 has the same content as the broadcast data broadcast by the broadcast station 200. The content data D1 includes, for example, live broadcast content such as baseball broadcasts and news programs, as well as prerecorded broadcast content such as quiz programs and music programs.

  The Internet distributor 12 embeds the current time as the distribution-side elapsed time (timeline) in the acquired content data, and distributes the content data D1 with the embedded timeline from the content server to the information terminals 2b to 2f. To do. The delivery-side elapsed time here refers to a processing speed equivalent to the playback speed of the content data in streaming format content data that requires a certain length of time for playback, such as video data or audio data, for example. This is the elapsed time when the current time is imprinted in the content and transmitted. In the present embodiment, when the content data D1 having the same contents as the radio broadcast at the broadcasting station 200 is simulcast, the broadcast elapsed time (broadcast time) of the radio broadcast is stamped in the content data D1 as the delivery side elapsed time. However, it synchronizes with the radio broadcast and delivers the same content at the same time. As a result, the same time as the broadcast time of the broadcast scene in the radio wave broadcast is stamped on the same scene in the content data D1 as a timeline at regular intervals (for example, every 1 second). . This timeline is periodically detected (one second interval) when played back on the client side.

  When the viewer accesses the program viewing web page, the content data D1 is distributed from the content distribution server 110, and the content data D1 received by the information terminals 2b to 2f is displayed on the browser unit 28 for viewing. Is possible. Here, the information terminals 2d to 2f share part or all of the content data downloaded by one of the information terminals with another information terminal by a so-called OLM (OverLay Multicast) peer-to-peer network system. Content data can be viewed by sharing and distributing content data between distributed information terminals and reconstructing the divided content data.

  When the user views the content data D1 in which the timeline is embedded, the information terminal 2b to 2f detects the timeline in accordance with the reproduction of the content data D1, and the reproduction history with the detected timeline as the delivery side elapsed time. In addition to recording as information, the current time at which each timeline is detected is added to the playback history information as viewing time data on the information terminal 2b side, and the playback history information is transmitted to the log information collection server 120 as log information D2. .

  The log information collection server 120 adds the reception time T1 on the log information collection server 120 side as a time stamp to the received log information D2, and accumulates it as log information D3. Then, the log information D3 is analyzed by the log analysis server 130, and is examined as the audience rating of the Internet TV based on the distribution side elapsed time, the viewing time data, and the reception time included therein. This audience rating data is transmitted to the Internet broadcaster 11. The log information D2 includes, for example, device type (PC / mobile), viewing status (start / continue / end), content name (such as a program name and a string associated with the program name), and elapsed time at the time of scene distribution. Information such as (delivery server side time), scene viewing time T2 (user side time), delivery method (normal / P2P / others), incidental information (GPS information and others), and the like are included.

(Configuration of audience rating survey system)
Next, the internal structure of the audience rating survey system will be described. FIG. 3 is a block diagram showing the internal configuration of the broadcast station 200, the content distribution server 110, the log information collection server 120, and the log analysis server 130 that constitute the audience rating survey system, and FIG. FIG. 5 is a block diagram showing an internal configuration of a browser unit of an information terminal constituting the audience rating survey system according to the present embodiment. The “module” used in the description refers to a functional unit that is configured by hardware such as an apparatus or a device, software having the function, or a combination thereof, and achieves a predetermined operation. .

(1) Content Distribution Server The content distribution server 110 is a server device that distributes content data to the information terminal 2, and in a document system such as WWW (World Wide Web), an HTML (HyperText Markup Language) file or an image file , A server computer that transmits information such as music files or software having such functions, stores information such as HTML documents and images, and in response to requests from client software such as a Web browser, IP such as the Internet This information is transmitted through the network. Specifically, the content distribution server 110 includes a data transmission unit 116, a data reception unit 115, and a synchronization processing unit 117 as communication modules, and a web data storage unit 111 as a module for storing each data. A content data storage unit 113, and a content generation unit 118 and a timeline insertion unit 112 as content editing modules.

  The data transmission unit 116 is a module that transmits data through the Internet 5 and transmits each data in packets. In the present embodiment, the data transmission unit 116 has a function of inserting a timeline into content data and distributing it. The data transmission unit 116 includes a streaming distribution unit 116a and a Web data distribution unit 116c.

  The streaming delivery unit 116 a is a module for streaming delivery of content data, reads out the content data stored in the content data storage unit 113 according to a predetermined broadcast schedule, and sends it to the Internet 5. In the streaming delivery unit 116a, the timeline insertion unit 112 inserts a timeline indicating the delivery side elapsed time of the content data into the content data read from the content data storage unit 113. In particular, in the present embodiment, the timeline insertion unit 112 uses the broadcast elapsed time (broadcast time) of the radio broadcast as the distribution side elapsed time when the content data D1 having the same content as the radio broadcast at the broadcast station 200 is simulcast. Insertion processing is performed on the content data D1 every second, and the same content is simultaneously distributed in synchronization with the radio broadcast. As a result, the same time as the broadcast time of the broadcast scene in the radio wave broadcast is stamped on the same scene in the content data D1 as a timeline at regular intervals (for example, every 1 second). .

  More specifically, the streaming distribution unit 116a performs distribution of content data in synchronization with transmission of broadcast data at the broadcast station 200 based on control by the synchronization processing unit 117. At this time, the timeline insertion unit 112 inserts a timeline indicating the distribution-side elapsed time of the content data into the content data.

  The timeline insertion unit 112 is linked to the synchronization processing unit 117, measures the time difference between the time of the radio broadcast in the radio broadcast unit 202 and the data distribution by the streaming distribution unit 116a, and the time difference between the radio broadcast and the streaming distribution. Is recorded in association with the timeline. This function records fluctuations in processing time required for broadcast video encoding and data transfer when simultaneously performing radio broadcast and streaming distribution, and reflects the gap between the timeline inserted into the content data and radio broadcast It is possible to conduct audience rating surveys.

  The timeline insertion unit 112 inserts the current time at the time of transmission as a timeline, and inserts data combining the meta information associated with the program such as the content name and the current time as timeline information. It is desirable to use these timeline information properly. Specifically, if you want to insert only the current time at the time of transmission into the timeline, insert a timeline of “12:00:00” and “12:01:00”, and information such as program name When inserting as information, the timelines of “Program-A20091224,12: 00: 00” and “Program-A20091224,12: 01: 00” are inserted. The elapsed time at the time of transmission becomes the distribution side elapsed time of the content data.

  Further, the streaming distribution unit 116a shares content data downloaded by any information terminal with other information terminals by a so-called OLM (OverLay Multicast) peer-to-peer network system, and is distributed information terminals. When distributing content data between each other, a function of transmitting distributed content data is provided.

  On the other hand, the Web data distribution unit 116c is a Web server that distributes display information (Web data) stored in the Web data storage unit 111 in response to a user operation by each client. The Web data distributed from the Web data distribution unit 116c includes, for example, a window in which the Internet TV is embedded, character information described in HTML or the like, and other link information. The web site can be browsed.

  On the other hand, the data receiving unit 115 is a module that receives broadcast data broadcast by the radio wave broadcasting unit 202, user operations transmitted from the information terminal 2, and audience rating analysis results transmitted from the log analysis server 130. Specifically, the data receiving unit 115 receives broadcast data broadcast by the radio wave broadcasting unit 202, transfers the data to the content generation unit 118, or receives content data from the data transmission unit 116 in response to a user operation received from the client side. Send it.

  The content generation unit 118 is a module that encodes broadcast data transferred from the radio wave broadcast unit 202 and converts it into a moving image file format. In addition, the content generation unit 118 has a function of generating content data based on the analysis result from the analysis result transmission unit 133 of the log analysis server 130, so that the content generation unit 118 can respond to the user's trend and regional characteristics. Content data can be generated. The content data generated by the content generation unit 118 is sent to the content data storage unit 113 and stored.

  The synchronization processing unit 117 is a module that synchronizes the broadcast data transmission timing in the radio broadcast unit 202 on the broadcast station 200 side and the content distribution timing by the data transmission unit 116 on the content distribution server 110 side.

  The Web data storage unit 111 is a storage device that stores Web data that is display information including a playback unit. The content data storage unit 113 is a storage device that stores content data submitted from the Internet broadcaster 11, and the content data has the same content as the broadcast data broadcast by the broadcast station 200. . In the simulcast, the broadcast data broadcast by the radio wave broadcast unit 202 is received by the data receiving unit 115, immediately encoded by the content generation unit 118, converted into a moving image data file, and the content data storage unit. 113 is accumulated.

(2) Log Information Collection Server As shown in FIG. 3, the log information collection server 120 is a server device that collects and accumulates log information transmitted from the information terminal 2, and includes a log information receiving unit 123 and a log collection Unit 122, user data storage unit 121, and absolute time acquisition unit 124.

  The log information receiving unit 123 is a module that receives log information in which the reproduction history of content data is recorded from the client side, and transmits the received log information to the log collecting unit 122. Here, the log information includes contents of content data viewed by the user, viewing time data, position information, user operation history information, and the like. In particular, in the present embodiment, the program detected in accordance with the reproduction of the content data A timeline that is the progress time is included as a time stamp.

  The log collection unit 122 is a module that collects and accumulates log information input from the log information reception unit 123. In this embodiment, the reception time of the log information received by the log information reception unit 123 is recorded in the log information. It is associated with the time stamp. In addition, the log collection unit 122 has a function of associating the time difference, which is measured and recorded by the timeline insertion unit 112, generated during the synchronization processing in the simulcast with the log information reception time and associated with the collected log information. Yes.

  The user data storage unit 121 is a storage device that stores, as log data, an operation history operated by the user and a playback history in which a time stamp is recorded in association with a user ID that identifies the user. The log information stored in the user data storage unit 121 is extracted by the log analysis server 130 and can be analyzed.

(3) Log Analysis Server The log analysis server 130 is a server device that investigates the audience rating from the collected log information, and includes a log information analysis unit 131, an analysis result display unit 132, and an analysis result transmission unit 133. I have.

  The log information analysis unit 131 extracts the log information stored in the user data storage unit 121, and determines the audience rating from the time stamp recorded in the log information, the reception time information of the log information associated with the time stamp, and the like. Is a module to analyze In addition, the present embodiment has a function of analyzing a time difference at the time of synchronization processing in simulcast, and content distribution is performed with respect to a difference between the broadcast time of broadcast data and the viewing time of content data streamed by simulcast. Considering the time difference in the server 110, a more detailed audience rating survey can be performed.

  The analysis result display unit 132 is a module that displays the result of the audience rating survey analyzed by the log information analysis unit 131, and the analysis result transmission unit 133 displays the result of the audience rating survey analyzed by the log information analysis unit 131. It is a module that transmits to the broadcast station 200 or the content distribution server 110.

(4) Broadcasting station
The broadcasting station 200 is a facility that performs various types of radio wave broadcasting such as terrestrial analog broadcasting, terrestrial digital broadcasting, BS digital broadcasting, or CS digital broadcasting. In this embodiment, a plurality of channels and broadcasting are provided. This method supports simultaneous broadcasting that broadcasts the same program at the same time. In this simulcast, the broadcasting station 200 has channels on a plurality of satellite platforms, and can share a program with the same content in a plurality of channels depending on the time of day, and by transferring broadcast data to a content distribution server. Simultaneous broadcasting with streaming distribution via a communication network such as the Internet is also possible.

  More specifically, broadcast data broadcasted by the broadcast station 200 is stored in the broadcast data storage unit 201 and transmitted through the radio wave by the radio wave broadcast unit 202. At this time, the broadcast data broadcast is transferred to the data receiving unit 115 of the content distribution server (or the broadcast wave is received on the content distribution server side), converted into a video file format that can be streamed, and the content data storage unit Accumulate in 113.

  The radio broadcast unit 202 can be connected to the synchronization processing unit 117, and the data transmission unit 116 of the content distribution server 110 distributes the content data in synchronization with the transmission of the broadcast data by the radio broadcast unit 202. Be able to. The broadcast station 200 also has a function of receiving the result of the audience rating survey analyzed by the log information analysis unit 131 of the log analysis server 130.

(5) Information Terminal On the other hand, as shown in FIG. 4A, the information terminal 2 includes a data receiving unit 27 and a log transmitting unit 21 as a communication system module, and a module for browsing the Web. As a browser unit 28, a media playback unit 28 a, a GUI control unit 28 b, a user operation acquisition unit 22, and an input / output interface 26.

  The data receiving unit 27 is a communication interface that receives various data such as content data and display information. The received display information is input to the browser unit 28, and the received content data is input to the media playback unit 28a. The log transmission unit 21 is a communication interface that transmits various data such as log information.

  The browser unit 28 is software that displays display information including the media playback unit 28a. The browser unit 28 can output video and audio through the output interface 26b, and can be output from an operation device such as a mouse or a keyboard through the input interface 26a. An operation signal is input as a user operation. The browser unit 28 displays a web page and enables user operations such as clicking on the web page and inputting characters. The media playback unit 28a is playback software for playing back content data, and can be displayed by embedding a playback screen in the browser unit 28.

  The GUI control unit 28b is a module that prompts a user operation in an interactive manner with the user, and accepts a screen display to the user, a click operation on the screen, a character input, and the like. By operating the GUI, the Internet broadcast viewing start / end and channel switching are performed, and these operations are acquired by the user operation acquisition unit 22. The user operation acquisition unit 22 is a module for acquiring a selection operation by the user at the time of reproducing content data. The log transmission unit 21 includes the user operation acquired by the user operation acquisition unit 22 in the log information. To the content distribution server 110.

  Furthermore, the information terminals 2b to 2f include a timeline monitoring unit 25, a log recording unit 24, a position information acquisition unit 23, and a log information storage unit 29 as modules relating to log information recording processing.

  The timeline monitoring unit 25 is a module that detects and monitors a timeline indicating the distribution side elapsed time of the content data inserted into the content data in the content distribution server 110 in accordance with the reproduction of the content data by the media reproduction unit 28a. is there. In the present embodiment, the timeline inserted into the content is information that is inserted into the content data every second and serves as an index of the content data delivery side elapsed time. Then, the timeline monitoring unit 25 detects this timeline every second and transmits it to the log recording unit 24 as a time stamp.

  The position information acquisition unit 23 is a module that acquires the current position of the own device. The position information acquisition unit 23 acquires the current position by GPS, the coordinate position of the communication area (wireless base station 6) where the own device is located, and the information It is transmitted to the log recording unit 24.

  The log recording unit 24 is a module that records the timeline detected by the timeline monitoring unit 25 in the log information as a time stamp. By recording a time stamp indicating the distribution-side elapsed time of the content data in the log information, the playback history by the media playback unit becomes a history based on the content distribution-side elapsed time. The log recording unit 24 also has a function of recording the reproduction history in the log information based on the time stamp of the timeline. In the present embodiment, the time information measured by the system clock unit 30 is viewed as the viewing time. As data, the user operation acquired by the user operation acquisition unit 22 is recorded as user information and the current position acquired by the position information acquisition unit 23 is recorded as position information in log information in association with each time stamp.

  The log information accumulating unit 29 is a memory device that accumulates the recorded log information for a certain period in the log recording unit 24. The log information accumulating unit 29 stores the log information accumulated every certain period in the log transmitting unit 21. Is sent to the log information collection server 120. Specifically, the log information accumulation unit 29 transmits log information to the log information collection server 120 via the log transmission unit 21 every second with the delivery side elapsed time inserted in the timeline as a trigger.

  Specifically, in such a module relating to log information recording processing, as shown in FIG. 6, first, when viewing of content data is started on the information terminals 2 b to 2 f side (1 in FIG. 6), information The terminals 2b to 2f detect the timeline at the time of starting viewing (2. in FIG. 6), and specify the viewing start time of the content data. Further, the timeline monitoring unit 25 detects the timeline at regular intervals while viewing the content data D1 (3 in FIG. 6), and specifies the distribution side elapsed time from the start of content data reproduction. In the present embodiment, the delivery side elapsed time information, which is a timeline, is inserted into the content data every second, and the timeline monitoring unit 25 detects the timeline every second by reproducing the content data. . Then, in the information terminals 2b to 2f, the timeline is continuously monitored until viewing of the content data D1 is completed (4 in FIG. 6).

  At this time, each of the information terminals 2b to 2f detects the timeline as each timeline in the content data arrives and records it in the log information as a time stamp, as well as viewing time data from the system timing unit 30, user operation The user operation information from the acquisition unit 22 and the reproduction history such as position information from the GPS function are also recorded in the log information (6. and 7. in FIG. 6), and the generated log information is stored in the log information storage. Is stored in the unit 29 (8 in FIG. 6). As a result, the operation information for starting the viewing of the content data and the user viewing time data are recorded as log information.

  When the viewing of the content data D1 ends, the timeline detection operation ends, and the playback history information that ends the viewing of the content data D1 is associated with the time stamp of the timeline detected immediately before the end as log information. It is recorded (5 in FIG. 6).

  Here, it is assumed that the content programs of channel A to channel C can be viewed on the information terminals 2b to 2f, and the content to be viewed can be changed by a user operation. For example, when the user performs an operation of switching the channel from the program aaa of channel A to the program bbb of channel B, the user operation acquisition unit 22 stops viewing of the program aaa of channel A and the program of channel B. The start of viewing bbb is detected as information related to the user operation.

  The timeline in the content data is time axis data indicating the distribution side elapsed time of the content data inserted in the content on the server side when the content is transmitted. The viewing time data is time axis data virtually defined on the information terminal, and the time progress is measured by the system time of the information terminal. Actually, the program time data synchronized with the timeline in the content data is shifted from the system time in the information terminal due to a time lag due to communication processing, a delay due to data processing, and an error in each system time. When recording the playback history by the media playback unit in the log information, since the timeline detected by the timeline monitoring unit 25 is recorded as a time stamp, the elapsed time on the delivery side of the content data is recorded in the log information. The

  Next, an internal structure of the information terminal 2a for viewing a broadcast program broadcast by the broadcast station 200 (for example, a one-segment broadcast program) will be described. In addition, the same code | symbol is attached | subjected to the component same as embodiment mentioned above, The function etc. are the same unless it mentions especially, The description is abbreviate | omitted. The information terminal 2a is a portable telephone using wireless communication, similar to the information terminals 2b and 2c, and includes a data receiving unit 31 and a system timing unit 30.

  The data receiving unit 31 receives display information and program data transmitted from the broadcast signal receiving device 9, and the received display information is input to the browser unit 28, and the received program data is received by the media playback unit 28a. Is input.

  The system timing unit 30 is a module that counts time information inside the information terminal 2a. In the present embodiment, the time information measured by the system timing unit 30 is synchronized with the reproduction of the content data by the media playback unit 28a. Monitor and send to log recording unit 24.

  The log recording unit 24 is a module that records the time information measured by the system time measuring unit 30 in the log information as viewing time data. In addition, the log recording unit 24 records the user information acquired by the user operation acquisition unit 22 and the current position information acquired by the position information acquisition unit 23 in log information in association with the viewing time data.

  The broadcast signal receiving device 9 includes a receiving unit 9c, an encoder unit 9b, a transmitting unit 9a, and an antenna 9d. The receiving unit 9c is a module that receives a broadcast signal of a program broadcast by a broadcasting station 200 such as a television (TV) broadcast or a radio broadcast via an antenna 9d, and transmits the received signal to the encoder unit 9b. To do. The encoder unit 9b is a module that converts broadcast signal data into codes that can be reproduced by the media reproducing unit 28a. The transmitter 9 a is a module that transmits the converted broadcast signal data to the data receiver 31.

  Next, as with the information terminals 2d to 2f, content data downloaded by any one of the information terminals 2d is transferred to the other information terminals 2e and 2f by a so-called OLM (OverLay Multicast) peer-to-peer network system. When sharing and distributing content data between distributed information terminals, as shown in FIG. 5, the browser unit 28 of the information terminals 2d to 2f includes a cache unit 28c and a content reconstruction unit 28d. And.

  The content reconstruction unit 28d is a module for reconstructing all or part of the content data transmitted from the content distribution server 110 or the other information terminals 2e and 2f, and the reconstructed content data is stored in the cache unit 28c. Send.

  The cache unit 28c is a buffer device that temporarily stores content data received from the content distribution server 110 or other information terminals 2e and 2f and played back by the media playback unit 28a. In the present embodiment, the media playback unit Prior to the content reproduction by 28a, the content is downloaded and stored in the cache unit 28c in advance. The data stored in the cache unit 28c can be shared with other information terminals 2e and 2f by an OLM (Over Lay Multicast) peer-to-peer network system, and the other information terminals 2e and 2f can be shared. Is transmitted to the other information terminals 2e and 2f.

(View rating method)
By operating the audience rating survey system having the above configuration, the audience rating survey method of the present invention can be implemented. FIG. 7 is a flowchart showing the operation of the audience rating survey system according to this embodiment.

  First, an application relating to the audience rating survey system is distributed from the content distribution server 110, log information collection server, or analysis server (S201, S301), and the information terminal 2 installs this application (S401).

  Here, in the broadcast station 200, radio broadcast of broadcast data is started (S101). The synchronization processing with the radio broadcast is executed in the synchronization processing unit 117 of the content distribution server 110 (S202). At the time of this synchronization processing, the timeline insertion unit 112 measures the time difference between the radio broadcast time in the radio broadcast unit 202 and the data distribution by the streaming distribution unit 116a in cooperation with the synchronization processing unit 117, and the radio broadcast and streaming. Record the time difference from the delivery in relation to the timeline. In parallel with this synchronization processing, a timeline is inserted into the content data D1 (S203), and the content data D1 with the timeline inserted is generated.

  Next, it is assumed that the information terminal 2b to 2f has accessed the Web site of the broadcast program (S402). For this access, user authentication may be performed by accepting input of a user ID or password. In this access, the IP address of the information terminal may be acquired, or it may be determined whether the access to the content is a drill-down from the top page or via a URL broadcast on a television broadcast. .

  The content distribution server 110 accepts access (S204), and in response to the access, the content distribution server 110 transmits display information to the information terminals 2b to 2f. On the information terminals 2b to 2f side, the received Web data is displayed on the browser unit 28, and reception and reproduction of streaming distribution of the content data D1 is started (S205 and S403). That is, the content data D1 and the display information are received by the information terminals 2b to 2f, the display information is displayed as a web page in the browser unit 28, and the media playback unit 28a is displayed so as to be embedded in the web page. The content data D1 is displayed on the media playback unit 28a.

  First, when the information terminals 2b to 2f confirm that the viewing of the content data D2 is started (S404), the confirmation information that the viewing is started is transmitted to the log information collection server 120, and the timeline monitoring unit 25 The timeline is detected (S405), and the time stamp at this time is recorded in the log information (S406).

  In addition, while the content data is being reproduced, the timeline monitoring unit 25 periodically detects the timeline in accordance with the reproduction of the content data by the media reproducing unit 28a every second. The current time (time stamp) is recorded in the log information as viewing time data (S405, S406), and the log information is transmitted to the log information collection server 120.

  The timeline monitoring on the information terminal side will be described in detail. As shown in FIG. 6, first, when viewing of content data is started on the information terminals 2b to 2f side (1 in FIG. 6), the information terminal The 2b to 2f side detects the timeline (2. in FIG. 6), and records the detected timeline in the log information (7. in FIG. 6) as a time stamp at the start of viewing. At this time, the viewing time information data, the position information, and the user operation information are also associated and recorded in the log information and accumulated in the log information accumulation unit 29 (6 in FIG. 6 and 8. in FIG. 6).

  The information terminals 2b to 2f detect the timeline every second while viewing the content data D2 (S405), and record the detected timeline in the log information as a time stamp (S406). ). Also at this time, the viewing time data, the position information, and the user operation information are recorded in the log information in association with the time stamp. The recorded log information is transmitted from the log information storage unit 29 to the log information collection server 120 via the log transmission unit 21 for each time stamp.

  After the log information is recorded, the information terminals 2b to 2f determine whether or not viewing of the content data is ended by a signal from the user operation acquisition unit 22 (S407), and the viewing of the content data is ended. If not ("N" in S407), the timeline monitoring process and the log information recording process are continued until the end of viewing is confirmed (S405, S406).

  On the other hand, when viewing of the content data D1 is finished in the information terminals 2b to 2f (“Y” in S407, 4. in FIG. 6), the information terminals 2b to 2f end the timeline detection operation (S408). The information related to the viewing end operation is recorded as log information including the viewing end time stamp in association with the time stamp detected immediately before the end (5 in FIG. 6). The log transmission unit 21 transmits log information including the viewing end time stamp accumulated in the log information accumulation unit 29 to the log information reception unit 123.

  When the log information collection server 120 receives confirmation of the start of viewing the content data D2 from the information terminals 2b to 2f (S302), it creates a folder related to the user in the user data storage unit 121, and the information terminal 2b Accept log information from ~ 2f. Then, the log information receiving unit 123 receives the log information every second (S303), and the log collecting unit 122 associates the reception time of the log information with the time stamp recorded in the log information (S304). The log information is stored in the user data storage unit 121 (S305).

  The log information collection server 120 confirms whether or not the log information including the viewing end time stamp has been received (S306). When the log information including the viewing end time stamp is not received ("N" in S306), The log information is received, and the same processing is performed on the received log information (S303 to S305). On the other hand, when log information including a viewing end time stamp is received (“Y” in S306), reception of log information is stopped.

  The log information receiving unit 123 receives log information as data being viewed from the start of viewing to the end of viewing, and stores all log information in association with the user data storage unit 121. In the log analysis server 130, the log information D2 is extracted from the user data storage unit 121, and the log information is analyzed by the log information analysis unit 131 (S307). In the present embodiment, in the simulcast, the log information analysis unit 131 causes a processing delay that occurs in the content distribution server 110 with respect to the difference between the broadcast time of the broadcast data and the viewing time of the content data streamed by simulcast. In consideration of this, a more detailed audience rating survey can be conducted.

  That is, at the time of distribution by the data transmission unit 116, the timeline insertion unit 112 cooperates with the synchronization processing unit 117 to measure the time difference between the time of radio broadcast in the radio broadcast unit 202 and the data distribution by the streaming distribution unit 116a, The time difference between radio broadcast and streaming distribution is recorded in association with the inserted timeline. As a result, fluctuations in the processing time required for broadcast video encoding and data transfer when radio broadcasting and streaming delivery are performed simultaneously are recorded, and the timeline inserted into the content data is reflected from the radio broadcast. Enables audience rating surveys.

  Thereafter, the analysis data, which is the result of the analysis, is transmitted to the content distribution server 110 and the broadcast station 200. The broadcast station 200 and the content distribution server 110 receive the analysis data that is the analysis result (S102, S206), and investigate the audience rating.

(Action / Effect)
According to the present embodiment, the timeline is embedded as information serving as an index of the elapsed time on the delivery side at regular intervals in content data such as a video that is simulcast like television broadcast, and the client (viewer) side Since the time history is monitored and the playback history such as the viewing time actually viewed by the user is recorded as the log information based on the time line, the content server is caused by the communication delay between the content server and the information terminal 2. Even if there is a time difference between the streaming delivery time on the side and the viewing time on the client device side, viewing information at the progress time actually viewed by the user can be acquired.

  In the present embodiment, since the acquired log information is stored in association with the reception time of the log information that is the actual time, the actual time information that the user was watching is also acquired, so the content progress time Can be combined with the existing viewing status, and more detailed and accurate audience rating information can be collected.

  In the present embodiment, the information terminal 2 further includes a user operation acquisition unit 22 that acquires a selection operation by the user at the time of reproduction of content data, and the log recording unit 24 is acquired by the user operation acquisition unit 22. Since the user operation is recorded in the log information in association with the time stamp, the log collection unit 122 accumulates the log information in association with the time stamp included in the log information received from the information terminals 2b to 2f and the user operation. By collecting logs of selection operations that reflect the user's intention and applying the collected results, it is possible to deliver content that matches the viewing trends of the user.

  In the present embodiment, the information terminals 2b to 2f further include a position information acquisition unit 23 that acquires the current position of the own device, and the log recording unit 24 uses the current position acquired by the position information acquisition unit 23 as the position. Information is recorded in log information in association with a time stamp, and the log collection unit 122 accumulates log information in association with the time stamp and position information included in the log information received from the information terminals 2b to 2f. By collecting user viewing information logs for each region and applying the collected results, it is possible to distribute content reflecting regional characteristics.

  Further, in the present embodiment, the radio broadcast unit 202 further transmits broadcast data having the same content as the content data via radio waves, and the data transmission unit 116 synchronizes with the transmission of broadcast data by the radio broadcast unit. Since data is distributed, content broadcasted in one direction via radio waves is synchronized with content distribution through a communication network such as the Internet that can enjoy the benefits of two-way communication. It is possible to develop services that combine the characteristics of two-way communication through the Internet.

D1, D2 ... Content data D3 ... Log information 1 ... Television receiver 2 (2b-2f) ... Information terminal 3 ... Reception antenna 3a ... Parabolic antenna 3b ... Radio tower 4 ... Communication satellite 5 ... Internet 6 ... Radio base station 7 ... Gateway device 9 ... Broadcast signal receiving device 9a ... Transmitting unit 9b ... Encoder unit 9c ... Receiving unit 9d ... Antenna 11 ... Internet broadcasting company 12 ... Internet distribution company 21 ... Log transmission unit 22 ... User operation acquisition unit 23 ... Location information Acquisition unit 24 ... log recording unit 25 ... timeline monitoring unit 26a ... input interface 26b ... output interface 27 ... data receiving unit 28 ... browser unit 28a ... media playback unit 28b ... GUI control unit 28c ... cache unit 28d ... content reconstruction unit 29 ... Log information storage unit 30 ... System Timekeeping unit 31 ... Data receiving unit 100 ... Content server 110 ... Content distribution server 111 ... Web data storage unit 112 ... Timeline insertion unit 113 ... Content data storage unit 115 ... Data reception unit 116 ... Data transmission unit 116a ... Streaming distribution unit 116c ... Web data distribution unit 117 ... Synchronization processing unit 117a ... Additional information management unit 118 ... Content generation unit 120 ... Log information collection server 121 ... User data storage unit 122 ... Log collection unit 123 ... Log information reception unit 124 ... Absolute time acquisition unit DESCRIPTION OF SYMBOLS 130 ... Log analysis server 131 ... Log information analysis part 132 ... Analysis result display part 133 ... Analysis result transmission part 200 ... Broadcast station 201 ... Broadcast data storage part 202 ... Radio wave broadcast part 202a ... Additional information broadcast part

Claims (6)

An audience rating survey system that distributes content data from a content server to a client terminal through a communication network constructed by connecting communication lines to each other, and surveys the audience rating.
The content server
A timeline insertion unit for inserting a timeline indicating the delivery side elapsed time of the content data into the content data;
A data transmission unit that distributes the content data in which the timeline is inserted through the communication network;
A radio broadcast unit for transmitting broadcast data having the same content as the content data via radio waves;
Provided in the timeline insertion unit, measures the time difference between the radio broadcast time in the radio broadcast unit and the data distribution by the data transmission unit, and records the time difference between the radio broadcast and streaming distribution in association with the timeline And the client terminal includes:
A receiving unit for receiving the content data;
A playback unit for playing back the content data;
A timeline monitoring unit for detecting and monitoring the timeline in accordance with the reproduction of the content data by the reproduction unit;
Based on the timeline detected by the timeline monitoring unit, a log recording unit that records a reproduction history by the timeline and the reproduction unit in log information;
A log transmission unit for transmitting log information recorded by the log recording unit,
A log collection unit that receives log information from the transmission unit and stores the log information in association with a timeline recorded in the log information is disposed on the communication network. And
The log collection unit records the time difference in association with the log information reception time in association with the collected log information;
The audience rating survey system, wherein the data transmission unit distributes the content data in synchronization with transmission of broadcast data by the radio wave broadcasting unit. The client terminal is
A user operation acquisition unit for acquiring a selection operation by a user at the time of reproduction of the content data;
The log recording unit records the user operation acquired by the user operation acquisition unit in the log information in association with the timeline;
The audience rating survey system according to claim 1, wherein the log collection unit accumulates the log information by associating the timeline included in the log information received from the client terminal with the user operation. . The client terminal is
It further includes a location information acquisition unit that acquires the current location of the aircraft,
The log recording unit records the current position acquired by the position information acquisition unit as position information in the log information in association with the timeline,
3. The audience rating according to claim 1, wherein the log collection unit accumulates the log information by associating the timeline included in the log information received from the client terminal with the position information. Survey system. A content server having a function of distributing content data to a client terminal through a communication network constructed by connecting communication lines to each other and investigating the audience rating,
A timeline insertion unit for inserting a timeline indicating the delivery side elapsed time of the content data into the content data;
A data transmission unit that distributes the content data in which the timeline is inserted through the communication network;
In the client terminal, based on a timeline detected in accordance with the reproduction of the content data, a log information receiving unit that receives log information that records the reproduction history of the timeline and the content data;
A log collection unit that accumulates the log information in association with a reception time of the log information with a timeline recorded in the log information;
A radio broadcast unit for transmitting broadcast data having the same content as the content data via radio waves;
Provided in the timeline insertion unit, measures the time difference between the radio broadcast time in the radio broadcast unit and the data distribution by the data transmission unit, and records the time difference between the radio broadcast and streaming distribution in association with the timeline With the ability to
The log collection unit records the time difference in association with the log information reception time in association with the collected log information;
The content server, wherein the data transmission unit distributes the content data in synchronization with transmission of broadcast data by the radio wave broadcasting unit. A client terminal having a function of receiving distribution of content data from a content server according to claim 4 through a communication network constructed by connecting communication lines to each other,
A receiving unit for receiving the content data;
A playback unit for playing back the content data;
A timeline monitoring unit that detects and monitors a timeline that is inserted into the content data in the content server and that indicates an elapsed time on the delivery side of the content data in accordance with the playback of the content data by the playback unit;
Based on the timeline detected by the timeline monitoring unit, a log recording unit that records a reproduction history by the timeline and the reproduction unit in log information;
A client terminal comprising: a log transmission unit that transmits log information recorded by the log recording unit. An audience rating investigation method for delivering content data from a content server to a client terminal through a communication network constructed by connecting communication lines to each other and examining the audience rating,
In the content server, a data transmission step of inserting a timeline indicating an elapsed time on the delivery side of the content data into the content data, and delivering the content data into which the timeline has been inserted through the communication network; and the client A reproduction step of receiving the content data and reproducing the content data at a terminal;
A timeline monitoring step of detecting and monitoring the timeline in accordance with the reproduction of the content data;
Based on the timeline detected by the timeline monitoring step, a log recording step for recording the timeline and a reproduction history by the reproduction step in log information;
A log transmission step for transmitting log information recorded in the log recording step;
A log collecting step for receiving the log information from the client terminal on the communication network, and associating the reception time of the log information with a timeline recorded in the log information, and storing the log information; Have
The content server is connected to a radio broadcast unit that transmits broadcast data having the same content as the content data via radio waves. In the distribution step, the content server is synchronized with transmission of broadcast data by the radio broadcast unit. Deliver content data,
In the data transmission step, the time difference between the radio broadcast time in the radio broadcast unit and the delivery of the content data is measured, and the time difference between the radio broadcast and the streaming delivery is recorded in association with the timeline ,
In the log collection step, the time difference is recorded in association with the collected log information in association with the log information reception time .