JP5044149B2 - Program broadcasting method and program broadcasting system - Google Patents

Description

  The present invention relates to a program broadcast method and program broadcast system for TV broadcast relay using Internet broadcast.

  Until now, methods for inserting links to Internet broadcasts in terrestrial broadcasts (see Patent Document 1) and methods for automatically switching from terrestrial broadcasts to Internet broadcasts (see Patent Document 2) have been proposed. Yes.

In addition, a method has been adopted in which only a time zone without a broadcast relay of a terrestrial broadcasting station is broadcast on another channel, such as top relay or relay relay.
Japanese Patent Application Laid-Open No. 2000-023120 Internet Information Transport Display System for Television Broadcasting Patent application title: Digital Broadcasting System, Transmitting Device, Receiving Device, Broadcast Content Transmitting Method, Transmission Path Switching Method

  However, live terrestrial live broadcasts where the end time is not clearly determined may end the live relay due to the unilateral convenience of the television station. There are people who want to see the continuation of the professional baseball broadcast later. This is especially true for good matches.

  Some people want to watch a program after a professional baseball broadcast, but the extension of the professional baseball broadcast may reduce the audience rating. In order to avoid this, Internet broadcasting may be used. Internet broadcasting can be viewed on demand and is not limited by the number of channels, so there is no need to interrupt broadcasting and broadcast other programs.

  However, the popularity of Internet broadcasts is low, and it is difficult to gather viewers if only Internet broadcasts are performed without terrestrial broadcasts.

  Therefore, the present invention solves the above problems, and for those who want to watch a program after a terrestrial live broadcast, the broadcast starts at the exact time as shown in the program guide and continues the live broadcast. For those who want to watch the program, the continuation of the terrestrial broadcast can be watched on the Internet broadcast, thereby improving the audience rating of the baseball broadcast and improving the audience rating of the Internet broadcast and promoting the spread of the Internet broadcast. It is an object to provide a broadcasting method and a program broadcasting system.

In order to solve the above problems, a program broadcasting method according to the present invention provides:
(1) The key information superimposing function of the television broadcast station broadcasts the key information for viewing the stream broadcast of the program following the television relay over the Internet in the signal of the program relayed by radio broadcast on the television. ,
(2) Record the radio broadcast by the recorder function provided in the equipment that can receive both the radio broadcast and the stream broadcast ,
(3) When a program broadcast on television by radio broadcast is extended, the message broadcast function of the television broadcast station sends a message to the broadcast screen of the television broadcast that a program that follows the television relay can be viewed on the Internet. Display
(4) The TV broadcast station switch means, after the end of the TV broadcast by the radio broadcast, starts the program stream broadcast,
(5) By the device viewing control means, the stream broadcast can be viewed with the key information, the radio broadcast is not recorded, and the viewing of the stream broadcast when the key information is not included is rejected,
(6) The stream function is recorded by the recorder function, and the recorded radio broadcast program and the stream broadcast program are associated with each other by the key information, and are played back continuously when these programs are viewed.

In addition, this program broadcasting method
A key information superimposing function for superimposing and broadcasting key information for viewing a stream broadcast of a program following the television relay over the Internet in a signal of a program relayed by a radio broadcast from a television broadcasting station;
A recorder function for recording both radio broadcast and stream broadcast is provided in a device capable of receiving both radio broadcast and stream broadcast;
Message broadcasting means for displaying a message on the broadcast screen of the television relay when the program broadcast on the television by radio broadcasting is extended;
In the television broadcasting station, switch means for starting the stream broadcasting of the program following the end of the television broadcast by the radio wave broadcasting,
In the apparatus , the stream broadcast can be viewed with the key information, the radio broadcast is not recorded, and viewing control means for rejecting the viewing of the stream broadcast when the key information is not included,
The recorder function records recorded radio broadcast programs and stream broadcast programs,
It can be realized by a program broadcasting system that is linked by key information and plays back in a row when these programs are viewed.

  In the present invention, at the moment when the terrestrial live relay broadcast ends, the switch means switches from the radio broadcast to the streaming broadcast, and the continuation of the live relay broadcast is started by the Internet broadcast. At this time, the broadcaster of the terrestrial live broadcast broadcast receives the broadcast information of the viewer (message and key information) so that the broadcaster of the terrestrial live broadcast can smoothly guide or guide the Internet broadcast by the message broadcast means and the key information superimposing means. Provide in a form that can be received by the terminal.

  The viewing terminal for the terrestrial live broadcast broadcast performs viewing of the Internet broadcast subsequent to the currently broadcasted broadcast based on the key information. Note that the viewing terminal may search for an access method from a program guide on the Internet based on the key information.

In the above-described invention, the stream broadcast provides the viewer with a scene (the final stage) that the TV viewer cannot see by broadcasting the continuation of the TV relay in the application layer multicast or multicast. It is preferable that the program is provided to the viewer as an integrated program of the radio broadcast and the stream broadcast .

  As described above, according to the present invention, a person who wants to watch a program after a terrestrial live broadcast broadcast can start viewing at an accurate time as shown in the program guide, and The continuation of wave broadcasting is performed by streaming streaming on the Internet, and the viewing is guided by a message or the like. Viewing Internet streaming broadcasts requires the key information received during radio broadcasts, so only people who were watching TV broadcasts were allowed to view streaming broadcasts and were not watching TV broadcasts. Access can be denied.

Thereby, according to the present invention,
・ For those who want to watch a program after a terrestrial customer baseball broadcast, they can watch the broadcast at the exact time according to the program guide.

・ Can also broadcast commercials on Internet broadcasting, doubles the opportunity to earn advertising revenue, and does not infringe on existing sponsor advertising models.

・ It will be a chance for general viewers to recognize the usefulness of Internet broadcasting.

・ Because the number of viewers for Internet broadcasting is high, it is easy to make a policy such as initial capital investment. Also, since most trading companies have bought the broadcast right to the end, there is almost no cost.

・ The audience rating of baseball broadcasts will increase, and a large audience rating will occur in Internet broadcasts, promoting the spread of broadcasting on the Internet.

Can be expected.

[First embodiment]
Embodiments of a broadcast system according to the present invention will be described below in detail with reference to the accompanying drawings. 1 to 3 are explanatory diagrams showing the overall configuration of the broadcasting system and the concept of the broadcasting method according to the present embodiment.

(Extended broadcast viewing system)
In the present embodiment, the broadcasting station is provided with both terrestrial broadcasting and Internet broadcasting, and at the moment when a specific time (terrestrial broadcasting program end time) is reached, the destination of broadcasting is changed from terrestrial broadcasting to Internet broadcasting. Switch. At this time, in the terrestrial live broadcast, as shown in FIG. 5, the key information (URL + password, etc.) for receiving the Internet streaming broadcast is transmitted, and the Internet is displayed on the screen using subtitles or QR codes. By displaying a guide to relay broadcasting, the viewer is guided to the Internet broadcasting.

  As shown in FIG. 1, the extended broadcasting system according to the present embodiment is a system for viewing a baseball broadcast at a stadium 7, and includes a television broadcasting station 40 that broadcasts broadcast content via radio waves, And a television receiver 5 that receives and reproduces the streaming broadcast. In this embodiment, viewing the Internet streaming broadcast requires the key information received at the time of the radio broadcast, and only those who have watched the television broadcast can view the continuous program streaming broadcast. Permitted and denied access by those who did not watch TV broadcasts.

  The TV broadcasting station 40 is a facility that broadcasts video and audio captured by the TV camera 71 installed in the stadium 7 via radio waves, and is transmitted via the radio tower 4 for radio broadcasting and the Internet 8 via the Internet 8. A content distribution server for distributing content is provided. Further, the television broadcast station 40 displays a message indicating that the television relay continuation program can be viewed on the Internet on the broadcast screen of the television relay when the television broadcast by radio broadcast is extended. A key information superimposing function for superimposing and broadcasting the key information for viewing the stream broadcast of the continuing program over the Internet in the signal by the radio broadcast, and a switch means for starting the stream broadcast after the radio broadcast is finished 41 and.

  A content distribution server is a server computer that transmits information such as HTML (HyperText Markup Language) files, image files, music files, etc. in a document system such as the World Wide Web (WWW) or software having such a function. Information such as images and images is stored, and in response to a request from client software such as a Web browser, such information is transmitted through an IP network such as the Internet. In particular, in the present embodiment, this content distribution server performs streaming distribution of the above-mentioned baseball broadcast audio and video, and has a function of switching between multicast communication and unicast communication as necessary during this streaming distribution. .

  The TV broadcast station 40 has a function of converting broadcast content into network content, switching between the Internet 8 and the radio tower 4 by a switching means, and sending the content from a content distribution server. The television broadcasting station 40 also has a function of monitoring the broadcast time and the broadcast content and detecting an extended broadcast portion exceeding a predetermined broadcast time zone in the broadcast content. Then, the broadcast station 40 converts the extended broadcast portion of the broadcast content into the net content according to the detection result by the monitoring function and sends it from the content distribution server, and distributes the net content related to the extended portion to the set top box 51. .

  The set-top box 51 is a device that can receive both terrestrial broadcasts and Internet broadcasts. The broadcast waves transmitted from the broadcast station 40 are transmitted by the user via the antenna 52 connected to the set-top box 51. Watched on the TV receiver 5 used. The set-top box 51 is connected to a terminal device 53 such as a modem, so that the content distributed from the Internet 8 can be viewed on the television receiver 5. The set-top box 51 is provided with viewing control means for enabling viewing of a stream broadcast using key information acquired via a television broadcast radio wave and refusing to view a stream broadcast without the key information. ing.

  In this set-top box 51, at the moment when a specific time (terrestrial broadcast program end time) is reached, a button that can be switched to the Internet 8 for streaming the continuation of the program on the screen of the television receiver 5. Alternatively, a link or the like is displayed together with a message and can be switched according to the viewer's selection. At this time, it may be automatically switched to the Internet broadcast channel that broadcasts the continuation. If the output terminal is a two-way terminal such as a personal computer at this time, it is possible to further entertain the viewer by skipping a twist or posting a link to a real-time bulletin board as a sub-content of the program. It is.

  In this embodiment, a method of superimposing a reference destination to the Internet broadcast following the terrestrial broadcast is adopted as a method for detecting the streaming broadcast of the extended broadcast. For example, as shown in FIG. As a method of detecting the access destination of the Internet broadcast that broadcasts the continuation of the live broadcast, for example, a reference to the terrestrial broadcast is inserted on the Internet broadcast side, and the terminal searches using the reference as key information for the search of the subsequent Internet broadcast By doing so, the switching destination to Internet broadcasting may be detected.

(Extended broadcast detection method)
The extended broadcast detection method can be implemented by operating the system having the above configuration. FIG. 7 is a flowchart showing the operation of the system according to the present embodiment.

  First, for those who want to watch a program after live terrestrial broadcast, the broadcast starts at the exact time according to the program table via terrestrial waves through the radio tower 4, etc. In the middle of, or at the time of termination, key information such as URL and password for streaming distribution on the Internet 8 is superimposed on the radio signal and transmitted.

  After the television broadcast time is over (S101), for those who want to continue watching the live broadcast broadcast, the terrestrial broadcast is continued by streaming broadcast via the Internet 8. In switching to the streaming broadcast, the broadcast station 40 detects the end of the program, and according to the detection result, the switch means 41 switches the radio broadcast from the radio tower 4 to the streaming broadcast by the distribution server.

  Thereafter, when the television broadcast ends, the viewing is guided by a message or the like (S102). In response to this guidance, the user performs a switching operation using a remote control or the like (S103), and switches to Internet broadcasting (S104) or continues to receive terrestrial broadcasting as it is (S105) according to the selection by the operation. Viewing Internet streaming broadcasts requires the key information received during radio broadcasts, so only people who were watching TV broadcasts were allowed to view streaming broadcasts and were not watching TV broadcasts. Access can be denied.

(Extended broadcast recording device)
The set-top box 51 described above may be provided with a recorder function as shown in FIG. This recorder function is a terminal that can store both terrestrial broadcasts and Internet broadcasts. When recording terrestrial live broadcasts, the relay of live terrestrial broadcasts ends, and the continuation continues with Internet broadcasts. Automatically record subsequent internet broadcasts as they are done. As this recording medium, a hard disk, a DVD, or the like can be used in addition to a video tape or the like.

  Furthermore, the recorder function can be associated with a recorded program so that it can be viewed continuously when viewed. As the association of the program, for example, the key information may be used, or a program guide or a keyword may be used.

  When recording by such an extended method total recording apparatus, the procedure shown in FIG. 8 is followed. FIG. 8 is a flowchart showing the operation of the extended method total recording apparatus according to the present embodiment.

  First, the terminal that records the program after the live terrestrial broadcast broadcast is broadcast at the exact time as shown in the program guide via the terrestrial wave through the radio tower 4, etc. Alternatively, key information such as URL and password for streaming delivery on the Internet 8 is superimposed on the radio signal and transmitted at the end time.

  After the TV broadcast time is over (S201), for those who want to continue watching the live broadcast, the terrestrial broadcast is continued by streaming broadcast via the Internet 8. In switching to the streaming broadcast, the broadcast station 40 detects the end of the program, and according to the detection result, the switch means 41 switches the radio broadcast from the radio tower 4 to the streaming broadcast by the distribution server.

  After that, at the end of the television broadcast, the switching control signal and the key information are received, so that the recording device detects the access method to the Internet broadcast and induces the switching (S102). In response to this guidance, depending on whether the extended broadcast follow-up setting is made in the recording device (S203), switching to the Internet broadcast (S204), continuing the recording of the subsequent program, or receiving the terrestrial broadcast as it is Continue (S205). Since viewing the Internet streaming broadcast requires the key information received during the radio broadcast, only the device that was recording the TV broadcast could allow the recording of the streaming broadcast, and the TV broadcast was not recorded. Device access can be denied.

(Action / Effect)
According to the present embodiment described above, those who want to watch a program after terrestrial live broadcast can start watching at an accurate time as shown in the program guide, and The continuation of wave broadcasting is performed by streaming streaming on the Internet, and the viewing is guided by a message or the like. Viewing Internet streaming broadcasts requires the key information received during radio broadcasts, so only people who were watching TV broadcasts were allowed to view streaming broadcasts and were not watching TV broadcasts. Access can be denied. For this reason, the audience rating of the baseball broadcast is also increased, and a large audience rating is also generated in the Internet broadcasting, and the spread of broadcasting on the Internet can be promoted.

  In particular, Internet broadcasts have the advantage of being able to stream the same commercials as TV broadcasts, doubling the opportunity to earn advertising revenue, and not infringing on existing sponsor advertising models. This makes it easier to formulate policies such as initial capital investment. In addition, since most trading companies have purchased broadcasting rights until the end, it can be expected that there will be little cost.

As a result, for example, when a major advertising agency goes to sell this system to a major beer maker,
“There will be a new project this time, it will be a baseball broadcast. The baseball broadcast has recently ended in a good place, and if it is extended, the drama will be slow, the recording will be lost and the viewer will be angry.”
"Now, the beer advertisements will be discontinued because the viewers suffer from indigestion, the audience rating will not increase so much, and we will not be able to handle it well.
"Wait a minute, if you're just halfway through the internet, staggering the time and relaying professional baseball from the middle"
“That is a problem, the program behind the viewer shifts and the viewer's PVR recording shifts.”
“This project will continue on the Internet when the relay time is over. And it does n’t puncture no matter how many people see it.
“Now, broadband is a tremendous penetration rate, so there is no problem.”
“I watch professional baseball and bulletin boards and drink beer between teas.”
“If you can write chat on the side of the baseball broadcast screen, you will see a lot, some people will filter out noise writing, but there are also such plans.”
“In the final game, we moved to the front of the computer and twisted while doing it.”
Smooth negotiations can be realized.

[Second Embodiment]
(Configuration of extended broadcasting system)
Next, the second embodiment will be described in detail. FIG. 9 is a conceptual diagram showing the overall configuration of the extended broadcasting system according to the present embodiment.

  As shown in the figure, the extended broadcasting system according to the present embodiment is a system for viewing a baseball broadcast on a stadium 7, and includes a television broadcasting station 40 that broadcasts broadcast content via radio waves, and the Internet 8. And a user terminal 1 (including 1a to 1d) that receives and reproduces the net content via the Internet 8. Also in this embodiment, viewing the Internet streaming broadcast requires the key information received at the time of the radio broadcast, and only those who have watched the television broadcast are allowed to view the streaming broadcast of the subsequent program. And the access of those who have not watched the television broadcast is denied.

  The TV broadcasting station 40 is a facility that broadcasts video and audio shot by a TV camera 71 installed in the stadium 7 via radio waves. Broadcast radio waves transmitted from the broadcast station are received by the television receiver 5 used by the user and the cable television station 6 which is a relay station. The radio broadcast directly received by the television receiver 5 can be viewed on the television receiver 5 as it is, and the radio broadcast received by the cable television station 6 is wired to the set-top box 51 through the cable 61 and is transmitted to the television receiver 5. And user terminal 1 with a built-in tuner function.

Note that the television broadcast station 40 can watch the TV relay continuation program on the TV broadcast screen on the Internet when the TV broadcast by radio broadcast is extended by the same system as the first embodiment described above. A message to that effect is displayed, and key information for viewing the stream broadcast of the program continued through the Internet 8 is superimposed on the signal by the radio broadcast, and the stream broadcast is started after the end of the radio broadcast.

  The content distribution server 2 is a server computer that transmits information such as an HTML (HyperText Markup Language) file, an image file, and a music file in a document system such as the World Wide Web (WWW) or software having the function. Information such as documents and images is stored, and the information is transmitted through an IP network such as the Internet in response to a request from client software such as a Web browser. In particular, in the present embodiment, the content distribution server 2 performs streaming distribution of the above-mentioned baseball broadcast audio and video, and has a function of switching between the multicast communication 82 and the unicast communication 81 as necessary during the streaming distribution. I have.

  The user terminal 1 (1a to 1d) is an arithmetic processing device including a CPU. In this embodiment, the user terminal 1 (1a to 1d) includes a communication function, and also has a function of receiving streaming distribution and executing an application for viewing. The user terminal 1 (1a to 1d) can be realized by a general-purpose computer such as a personal computer or a dedicated device with special functions, and includes a mobile computer, a PDA (Personal Digital Assistance), and a mobile phone. .

  A management server 3 is installed between the content distribution server 2 and the television broadcasting station 40. The management server 3 acquires broadcast content broadcast from the TV broadcast station 40 from the TV broadcast station 40, converts the acquired broadcast content into net content, and transmits the content to the content distribution server 2. It is a server device that performs a function. The management server 3 also functions as a monitoring unit that monitors the broadcast time and broadcast content of the television broadcast station 40 and detects an extended broadcast portion exceeding a predetermined broadcast time zone in the broadcast content. Then, the management server 3 converts the extended broadcast portion of the broadcast content into network content according to the detection result by the monitoring means function, and sends it to the content distribution server 2. The content distribution server 2 distributes the net content related to the extended portion converted by the management server 3 to the user terminals 1 (1a to 1d).

  Further, as shown in FIG. 12, the management server 3 has functions of a DRM (Digital Rights Management) license unit 31 and an accounting totaling unit 32. The DRM license unit 31 is a server device that performs user authentication processing and issues a decryption key D3 based on the access information of the user when viewing network content. Specifically, the DRM license unit 31 receives the distribution request D1 of the decryption key D3 from the user terminal 1 of the user, and issues and distributes the decryption key D3 to the authorized user after the authentication process. When the decryption key D3 is distributed from the DRM license unit 31 to the user terminal 1 of the user, the content is decrypted on the user terminal 1 based on the decryption key D3, and the reproduction process becomes possible.

  In addition, the DRM license unit 31 collects the viewing status of each user based on the authentication process and the distribution history of the decryption key D3 and accumulates them in the user database 33. At this time, based on the data accumulated in the user database 33, the DRM license unit 31 aggregates which user is viewing which net content and when, and uses the aggregated results as viewing history data. Accumulate in database 33. The accounting totaling unit 32 calculates the accounting for each user based on the viewing history data acquired from the user database 33 and accumulates accounting information as a calculation result in the user database 33.

(User terminal configuration)
FIG. 10 is a block diagram showing an internal configuration of the user terminal 1 (1a to 1d). As shown in the figure, the user terminal 1 (1a to 1d) includes a communication interface 11, a communication mode switching unit 12, a cache unit 17, a content playback unit 13, and an output as modules related to streaming reception / playback. A signal generation unit 14, an output interface 20, a display unit 21, and a monitoring unit 18 are provided.

  The communication interface 11 is a module that transmits and receives data as packets through the Internet 8. The network content D4, the terminal list D2, and the like are received via the communication interface 11, and the distribution request D1 and the like are transmitted to the content distribution server 2. Sent to.

  The cache unit 17 is a buffer device that temporarily stores and holds the net content received from the Internet 8 and played back by the content playback unit 13. In the present embodiment, prior to content playback by the media viewing application 22, the content is downloaded and stored in advance. The data stored in the cache unit 17 can be shared with other user terminals by an OLM peer-to-peer network system. Sent to other user terminals.

  The communication mode switching unit 12 determines the communication mode (multicast mode or unicast mode) of the communication partner based on the storage capacity of the cache unit 17 detected by the monitoring unit 18 and the connection state to the network in the communication interface 11. This module performs switching. That is, the communication mode switching unit 12 includes a unicast communication unit 12a that executes a unicast mode in which data is transmitted / received in a one-to-one relationship with a single communication partner, and data transmission / reception in a one-to-many relationship with a plurality of communication partners. A multicast communication unit 12b for executing a multicast mode for performing Based on the control signal from the monitoring unit 18, the communication mode switching unit 12 selectively connects these communication units 12a or 12b to the communication interface 11, thereby enabling either the unicast mode or the multicast mode. Or both of these modes.

  Further, the user terminal 1 includes a monitoring unit 18 and a distribution request unit 19 as modules relating to a distribution request. The monitoring unit 18 is a module that detects and monitors the storage capacity in the cache unit 17 and the connection state to the Internet 8 through the communication interface 11, and transmits a control signal instructing mode switching based on the monitoring result to the communication mode switching unit. 12 and the distribution request unit 19. The distribution request unit 19 is a module that transmits a distribution request for playing net contents in accordance with a user operation (media viewing application activation or channel change). In this embodiment, the distribution request includes a distribution request for the decryption key D3 and a distribution request for net content (main stream / banner data) D4. These distribution requests are transmitted to the content distribution server 2.

  In addition, the distribution request unit 19 detects a communication mode that can be executed by the content distribution server 2 or another user terminal (for example, 1a or 1b), and the content server or other communication partner that is a communication partner according to the detected communication mode A user terminal is selected, and a content distribution request specifying a communication mode is transmitted to the selected communication partner. Note that the selection of the communication partner according to the communication mode is performed based on the executable communication mode of each terminal described in the terminal list D2.

  The content playback unit 13 is a module that plays back Web pages, moving image data, and audio data, and outputs them from the media viewing application 22 on the display unit 21, the speaker 20a, and the like. The content reproduction unit 13 decrypts and reproduces the net content cached in the cache unit 17 by using key information (URL + password) and decryption key D3 corresponding to the net content acquired through the broadcast radio wave. Only the user who was watching the television broadcast can continue to view the program using the key information, and the viewing of the stream broadcast that does not have the key information is rejected.

  The content playback unit 13 may be provided with a function of inserting banner data on a Web page or inserting a video clip for advertisement into a main stream of net content. Such a video clip insertion function includes, for example, an insertion position detection process for analyzing a main stream and detecting a position where additional information such as CM clip data is inserted, and a CM clip at a position detected by the detection process. Is inserted, and the network content is played back while inserting the CM clip into the main stream.

  Furthermore, the content playback unit 13 may have a function of recording the playback history and playback stop position of the played net content as user trend data, and changing the next playback start position in accordance with this recording. Specifically, the net content (main stream, CM clip) that the user has already viewed, the file name of the banner data, and the playback stop position are stored as a playback history (user trend data) in a storage device such as a hard disk, At the time of reproduction, the reproduction history is referred to. If the content has already been viewed, the content is skipped, or if the viewing is stopped in the middle, the reproduction is continued from there.

  The output signal generation unit 14 converts the net content that can be played back by the content playback unit 13 into a video signal and an audio signal, and converts the net content to a video signal such as the media viewing application 22 displayed on the display unit 21. This is a module that synthesizes video signals and generates a signal that can be output by the display unit 21 or the speaker 20a.

  The output interface 20 is a module that outputs video and audio output signals from the display unit 21 and the speaker 20a, respectively. The display unit 21 is a display device such as a liquid crystal display, for example, and synthesizes and displays a plurality of screens such as the media viewing application 22.

  In addition, the user terminal 1 includes an application execution unit 15 and an operation device interface 16 as modules related to the user interface.

  The application execution unit 15 is a module that executes applications such as a general OS, browser software, and the media viewing application 22, and is usually realized by a CPU or the like. The application execution unit 15 can receive a chat service related to sports watching by executing chat software linked with the media viewing application 22, for example.

  The operation device interface 16 is a module to which operation devices such as a mouse and a keyboard are connected, and the operation signals are input / output. By using the application execution unit 15 and the operation device, the user can input a keyword for searching for content or input a character string that is an evaluation of the net content after viewing.

(Extended broadcasting method)
By operating the extended broadcasting system having the above configuration, the extended broadcasting method of the present invention can be implemented. FIG. 13 is a sequence diagram showing the operation of the extended broadcasting system according to this embodiment.

  First, when a baseball game is started on the stadium 7 (S301), broadcasting via radio waves by the television broadcasting station 40 is started (S302), and each user receives the television receiver 5 (or the television of the user terminal 1). The broadcast function can be viewed by the tuner function (S303).

  After that, the end time of the TV broadcast arrives before the match is over (S304), and when the baseball broadcast exceeds the broadcast time zone, an extension broadcast is detected in the management server 3 (S305), and the TV broadcast station 40 The extension broadcast part of the broadcast content is transferred to the management server 3 (S306). The management server 3 converts the broadcast content of the extended broadcast portion into network content (S307), and distributes the converted network content to the user terminals 1 (1a to 1d) of each user (S308).

  On the user side, the baseball broadcast that has been viewed by the television receiver 5 (or the television tuner function of the user terminal 1 or the like) is viewed by the streaming reception function of the user terminal 1 via the Internet 8 (S309).

  In viewing this streaming, in the present embodiment, the network content distributed by the content distribution server 2 is received and viewed in a so-called OLM (peer-to-peer) network system form. Specifically, as shown in FIGS. 11 and 12, the user terminal 1 of the user transmits a distribution request to the DRM license unit 31, and uses a decryption key D3 for reproducing the net content related to the distribution request. The terminal list D2 of other user terminals that receive a part or all of the net content related to the request is acquired from the DRM license part 31 or the other user terminal 1a.

  Next, the user terminal 1 selects an arbitrary user terminal as a partner terminal device from the terminal list D2, makes a distribution request, and requests from the selected partner terminal (here, the user terminal 1a) or the content distribution server 2. A part or all of the net content D4 related to is received. In receiving the net content D4, as described above, the partner terminal device (user terminal 1a or 1b) can be selected depending on whether the necessary communication form is the multicast mode or the unicast mode.

  Then, the user terminal 1 reconstructs the net content D4, and reproduces and views it with the decryption key D3. The user terminal 1a selected as the partner terminal relays the net content D4 received from the content distribution server 2 etc. and held in its own buffer memory to the client terminal (user terminal 1) related to the distribution request. To deliver.

  Then, in response to the end of the game at the stadium 7 (S310), the distribution by the content distribution server 2 is ended (S311), and the user's viewing is also ended (S312).

(Action / Effect)
According to the present embodiment as described above, while the program is broadcasted by the TV broadcast station 40 via radio waves, the net content is not distributed, and the broadcast content is not changed as the net content until the extension broadcast is started. Delivered via the Internet 8. The viewer can continue to view the portion exceeding the broadcast time zone (broadcast program frame) on the user terminal connected to the network. Thereby, according to this embodiment, while responding to the needs of both the user who wants to watch a baseball broadcast and the user who wants to watch a program other than a baseball broadcast, it can contribute to the spread of television broadcasting through the Internet.

  Further, in the present embodiment, the distribution of the net content is acquired by a so-called peer-to-peer method by acquiring part or all of the net content related to viewing from another user terminal, and decrypted by the decryption key D3, Since the net content related to viewing is reproduced, the burden on the content distribution server 2 can be reduced, communication can be avoided, and the communication load can be reduced.

1 is an explanatory diagram showing an overall configuration of a broadcasting system according to a first embodiment. FIG. FIG. 3 is an explanatory diagram showing a concept of a broadcasting method by the broadcasting system according to the first embodiment. 1 is a block diagram illustrating a configuration of a broadcasting system according to a first embodiment. FIG. 1 is a block diagram showing a configuration of a recording apparatus according to a first embodiment. FIG. 6 is a block diagram showing a method for detecting extended broadcasting according to the first embodiment. FIG. 6 is a block diagram showing a modification example of the extension broadcast detection method according to the first embodiment. FIG. 4 is a flowchart showing an extension broadcast detection method according to the first embodiment. FIG. 6 is a flowchart showing a method for recording an extended broadcast according to the first embodiment. FIG. 5 is a conceptual diagram showing an overall configuration of an extended broadcasting system according to a second embodiment. It is a block diagram which shows the internal structure of the user terminal 1 (1a-1d) which concerns on 2nd Embodiment. FIG. 10 is an explanatory diagram schematically showing an operation when P2P (Peer to Peer) communication is performed between distributed user terminals by the OLM method in the second embodiment. FIG. 10 is an explanatory diagram schematically showing an operation when P2P communication is performed between distributed user terminals by the OLM method in the second embodiment. FIG. 10 is a sequence diagram showing an operation of the extended broadcasting system according to the second embodiment.

Explanation of symbols

1a… User terminal
1… User terminal
2. Content delivery server
3 ... Management server
40 ... TV broadcasting station
4 ... Radio tower
5 ... TV receiver
6 ... Cable TV station
7 ... Stadium
8 ... Internet
11… Communication interface
12a… Unicast Communication Department
12a, 12b ... Communication part
12b: Multicast communication part
12 ... Communication mode switching part
13… Content playback section
14 ... Output signal generator
15 ... Application execution part
16 ... Operation device interface
17 ... Cache part
18 ... Monitoring section
19 ... Delivery request part
20a… Speaker
20… Output interface
21 ... Display section
22… Media viewing application
31… DRM license section
32. Billing summary department
33 ... User database
41 ... Switch means
51… Set top box
52 ... Antenna
53 ... Terminal equipment
61 ... Cable
71 ... TV camera
81 ... Unicast communication
82 ... multicast communication

Claims (4)

By the key information superimposing function of the television broadcasting station, the key information for watching the stream broadcast of the program following the television relay is superimposed on the signal of the program relayed by the radio broadcast on the Internet, and broadcasted.
With the recorder function provided in the device capable of receiving both the radio broadcast and the stream broadcast , the radio broadcast is recorded,
When a program broadcast on television by the radio broadcast is extended, a message to the effect that the television broadcast continuation program can be viewed on the Internet is displayed on the television broadcast screen by the message broadcast function of the television broadcast station. Display
By the switch means of the television broadcast station, the broadcast of the continued program is started after the end of the television broadcast by the radio broadcast,
The viewing control unit of the device, the stream broadcast and can be viewed by the key information, without recording the radio broadcast, rejects the viewing of the stream broadcast in the case where no said key information,
Recording the stream broadcast by the recorder function, associating the recorded radio broadcast program and the stream broadcast program with the key information, and playing them back when the programs are viewed A program broadcasting method characterized. The stream broadcast by application layer multicast, or in a multicast broadcasting a continuation of televised on the Internet, a scene that can not be seen by television viewers (late phase) is provided to the viewer, and radio broadcasting 2. The program broadcast method according to claim 1, wherein the program is provided to the viewer as a program integrated with the stream broadcast . A key information superimposing function for superimposing and broadcasting key information for viewing a stream broadcast of a program following the television relay over the Internet in a signal of a program relayed by a radio broadcast from a television broadcasting station;
Provided in a device capable of receiving both the radio broadcast and the stream broadcast, a recorder function for recording the radio broadcast and the stream broadcast;
Message broadcast means for displaying a message on the broadcast screen of the television relay when the program broadcast on the television by radio broadcast is extended, a message indicating that the program following the television relay can be viewed on the Internet;
In the television broadcast station, switch means for starting the stream broadcast of the continuing program after the end of the television broadcast by the radio broadcast, and in the device , the stream broadcast can be viewed with the key information and the radio broadcast is not recorded , Viewing control means for refusing to view the stream broadcast when the key information is not included,
The recorder function is to record the recorded radio broadcast program and the stream broadcast program,
A program broadcasting system characterized by being linked by the key information and playing continuously when viewing these programs. The stream broadcast by application layer multicast, or in a multicast broadcasting a continuation of televised on the Internet, a scene that can not be seen by television viewers (late phase) is provided to the viewer, the radio broadcast 4. The program broadcasting system according to claim 3, wherein the program is provided to the viewer as an integrated program of the stream broadcasting .