JP2011004180A - Content cooperation reproducing method based on distribution policy, proxy control terminal and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a content cooperation reproducing method that simultaneously reproduces second content related to first content by using different recording terminals and reproducing terminals when a control terminal uses the recording and reproducing terminals so as to reproduce the first content.SOLUTION: The control terminal is connected with a proxy control terminal. First, the control terminal sends a control request message for first content to the proxy control terminal. Then, the proxy control terminal uses a content attribute memory to search for the first attribute information on the first content, and it uses a distribution policy memory to determine whether or not the first attribute information corresponds to distribution policy information. It also uses the content attribute memory to search for the second address of second content based on second attribute information corresponding to the distribution policy information. Then, the proxy control terminal sends the control request message to the first and second addresses.

Description

  The present invention relates to a reproduction control technique using a control terminal for a content reproduction terminal and a recording terminal connected to a home network.

  Home network systems in which a plurality of home appliances are connected to a local area network (LAN) have become widespread in ordinary homes. By interconnecting different home appliances, remote control and operation state monitoring from other devices can be realized.

  There is the DLNA (Digital Living Network Alliance) as an industry standardization organization that prescribes protocols used in home networks. The DLNA-compliant protocol realizes a home network in a multi-vendor environment and realizes interoperability between different home appliances. Accordingly, digital content stored in one home appliance can be used from the other home appliance.

  According to the DLNA protocol stack, Ethernet (registered trademark) or wireless LAN (IEEE802.11) is applied as a physical layer in a home network, and TCP / IP (Transmission Control Protocol / Internet Protocol) is applied as a network layer. The As the transport layer, HTTP (HyperText Transfer Protocol) is applied to the content transmission function, SOAP (Simple Object Access Protocol) is applied to the content selection function, and SSDP is used for the address setting / device discovery function. (Simple Service Discovery Protocol) is applied.

  FIG. 1 is a basic sequence diagram of DLNA in the prior art.

According to FIG. 1, the following terminals corresponding to DLNA are connected to the home network.
Recording terminal: DMS (Digital Media Server) or M-DMS (Mobile-DMS)
Playback terminal: DMR (Digital Media Renderer) or M-DMR (Mobile-DMR)
DMP (Digital Media Player) or M-DMP (Mobile-DMP)
Control terminal: DMC (Digital Media Controller) or M-DMC (Mobile-DMC)

  The recording terminal DMS is, for example, a hard disk recorder that stores content, and transmits the content to the playback terminal DMR. The playback terminal DMR is, for example, a television (digital music player, digital photo frame, etc.) that plays back content, and receives the content from the recording terminal DMS. The control terminal DMC is a remote controller (for example, can be mounted on a mobile phone) that controls the playback terminal DMR and the recording terminal DMS. The control terminal DMC causes the content to be transferred from the recording terminal DMS that stores the desired content to the desired playback terminal DMR in response to a user operation. The playback terminal DMR plays the content and allows the user to view it.

(S11) The control terminal DMC transmits a search request message to the home network by a user operation. The search request message includes, for example, a discovery request (SEARCH) for finding a device, an acquisition request (GET) for confirming device specifications, and a browse request (BROWSE) for acquiring a content list. According to FIG. 1, the control terminal DMC transmits a search request (SEARCH) message to the playback terminal DMR and transmits a search request (SEARCH / BROWSE) message to the recording terminal DMS. The recording terminal DMS and the reproduction terminal DMR that have received the search request message return a response message to the control terminal DMC. Thereby, the control terminal DMC can know the recording terminal DMS and the reproduction terminal DMR connected to the home network.
(S12) The control terminal DMC displays the received content list on the display and causes the user to select content. Then, the control terminal DMC transmits a setting request POST (SetAV_TransportURI) message including the URI (Uniform Resource Identifier) of the content selected by the user to the reproduction terminal DMR. As a result, the playback terminal DMR can know the URI that is the storage location of the content.
(S13) Next, the control terminal DMC transmits a playback request (PLAY) message of the content to the playback terminal DMR.
(S14) The playback terminal DMR that has received the playback request (PLAY) message transmits a playback request (HTTP GET) message to the recording terminal DMS.
(S15) Thereby, the recording terminal DMS transmits the requested content to the reproduction terminal DMR. The playback terminal DMR plays back the received content, and the user can view this content.

  In the basic sequence as described above, there is a technique that realizes a collective search for content by connecting a “collection server” to a home network (see, for example, Patent Document 1). According to this technique, content management information is acquired from a recording terminal according to a predetermined condition, and storage location information (folder information) of content included in the content management information is recorded as a content category. Thereby, the folder information of the content can be used as a search key.

  As a prior art document of the same applicant, there is a technique of automatically registering the address of the playback terminal DMR (DMP) of the content in the recording terminal DMS (see, for example, Patent Document 2).

JP 2008-299817 A JP 2008-250598 A

  With the increase in DLNA-compatible home appliance information devices, a plurality of playback terminals and a plurality of recording terminals are connected to the home network. In order to reproduce one content, the control terminal controls to transfer the content from a recording terminal storing the content to a desired reproduction terminal of the user. For example, it is assumed that a family trip photograph (digital image) is reproduced with a photo frame, and music relating to the travel destination is reproduced from a music player. Even in this case, the control terminal needs to execute the basic sequence as shown in FIG. 1 for each content.

  According to the technique described in Patent Document 1, the efficiency of content search can be improved. However, when different recording terminals and playback terminals are used for a plurality of different contents, the basic sequence must be executed for each of the contents. I must.

  Therefore, according to the present invention, when the control terminal reproduces the first content using the recording terminal and the reproduction terminal, the second content related to the first content is obtained using the different recording terminal and reproduction terminal. An object is to provide a content cooperative reproduction method, a proxy control terminal, and a program that can be reproduced simultaneously.

According to the present invention, there is provided a content cooperative playback method from a control terminal in a system in which a plurality of playback terminals and a plurality of recording terminals compatible with a home network protocol are connected to a network,
A proxy control terminal is further connected to the network,
The control terminal is connected to the proxy control terminal,
The proxy control terminal includes a content policy storage unit that stores content attribute information stored in the recording terminal, and a distribution policy storage unit that stores distribution policy information that associates a plurality of attribute information based on a predetermined condition.
A first step in which the control terminal transmits a control request message for the first content to the proxy control terminal;
A second step in which the proxy control terminal searches for the first attribute information of the first content using the content attribute storage unit;
A third step in which the proxy control terminal searches for whether or not the first attribute information corresponds to the distribution policy information using the distribution policy storage unit;
A fourth step in which the proxy control terminal searches for the second address of the second content based on the second attribute information corresponding to the distribution policy information using the content attribute storage unit;
The proxy control terminal includes a fifth step of transmitting a control request message to the first address of the first content and the second address of the second content.

According to another embodiment of the content cooperative playback method of the present invention,
The attribute information is the creation date and time, creation position and / or keyword of the content,
It is also preferable that the distribution policy information is a certain time range, a certain region range, and / or a keyword.

  According to another embodiment of the content cooperative reproduction method of the present invention, the proxy control terminal is preferably a cradle on which the control terminal can be placed.

According to another embodiment of the content cooperative playback method of the present invention,
The proxy control terminal is the default gateway connected to the network,
The control request message transmitted from the control terminal is also preferably transmitted to the playback terminal and the recording terminal via the default gateway.

According to another embodiment of the content cooperative playback method of the present invention,
The home network protocol is a DLNA compliant protocol,
The playback terminal functions as DLNA compatible DMP or M-DMP, or DLNA compatible DMR or M-DMR,
The recording terminal functions as a DLNA-compliant DMS or M-DMS,
The control terminal functions as a DLNA-compliant DMC or M-DMC,
The playback terminal functions as an HTTP client to the recording terminal,
The control request message transmitted from the control terminal to the proxy control terminal is preferably a search request (SEARCH / BROWSE method), a setting request (SetAV_TransportURI action in the POST method), and a playback request (PLAY method).

According to the present invention, for a system in which a plurality of playback terminals and a plurality of recording terminals compatible with a home network protocol are connected to a network, the proxy control terminal is connected to the network and to the control terminal,
Content attribute storage means for storing attribute information of the content accumulated in the recording terminal;
Distribution policy storage means for storing distribution policy information for associating a plurality of attribute information based on a predetermined condition;
Control request message receiving means for receiving a control request message for the first content from the control terminal;
First content search means for searching for first attribute information of the first content using the content attribute storage means;
A distribution policy search means for searching whether or not the first attribute information corresponds to the distribution policy information using the distribution policy storage means;
Second content search means for searching for a second address of the second content based on the second attribute information corresponding to the distribution policy information using the content attribute storage means;
Multicast transmission means for transmitting a control request message to the first address of the first content and the second address of the second content is characterized.

According to another embodiment of the proxy control terminal of the present invention,
The attribute information is the creation date and time, creation position and / or keyword of the content,
It is also preferable that the distribution policy information is a certain time range, a certain region range, and / or a keyword.

  According to another embodiment of the proxy control terminal of the present invention, the proxy control terminal is also preferably a cradle on which the control terminal can be placed.

According to another embodiment of the proxy control terminal of the present invention,
The proxy control terminal is the default gateway connected to the network,
The control request message transmitted from the control terminal is also preferably transmitted to the playback terminal and the recording terminal via the default gateway.

According to another embodiment of the proxy control terminal of the present invention,
The home network protocol is a DLNA compliant protocol,
The playback terminal functions as DLNA compatible DMP or M-DMP, or DLNA compatible DMR or M-DMR,
The recording terminal functions as a DLNA-compliant DMS or M-DMS,
The control terminal functions as a DLNA-compliant DMC or M-DMC,
The playback terminal functions as an HTTP client to the recording terminal,
The control request message transmitted from the control terminal to the proxy control terminal is preferably a search request (SEARCH / BROWSE method), a setting request (SetAV_TransportURI action in the POST method), and a playback request (PLAY method).

According to the present invention, a system in which a plurality of playback terminals and a plurality of recording terminals compatible with a home network protocol are connected to a network is installed in a proxy control terminal that is connected to the network and to a control terminal. A program that causes a computer to function,
Content attribute storage means for storing attribute information of the content accumulated in the recording terminal;
Distribution policy storage means for storing distribution policy information for associating a plurality of attribute information based on a predetermined condition;
Control request message receiving means for receiving a control request message for the first content from the control terminal;
First content search means for searching for first attribute information of the first content using the content attribute storage means;
A distribution policy search means for searching whether or not the first attribute information corresponds to the distribution policy information using the distribution policy storage means;
Second content search means for searching for a second address of the second content based on the second attribute information corresponding to the distribution policy information using the content attribute storage means;
The computer is caused to function as multicast transmission means for transmitting a control request message to the first address of the first content and the second address of the second content.

  According to the content cooperative playback method, proxy control terminal, and program of the present invention, when the control terminal plays back the first content using the recording terminal and the playback terminal, the second content related to the first content. Can be reproduced simultaneously using different recording terminals and reproducing terminals.

It is a basic sequence diagram of DLNA in the prior art. It is a system configuration diagram in the present invention. It is explanatory drawing showing the correspondence of content attribute information and delivery policy information. It is a sequence diagram in the present invention. It is a function block diagram of the proxy control terminal in this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  According to the present invention, a “proxy control terminal” is connected to the home network. The “proxy control terminal” is connected between the control terminal, the playback terminal, and the recording terminal, and “proxy” as a control terminal to the playback terminal and the recording terminal. The proxy control terminal corresponds to the home network protocol and appears to the control terminal as a playback terminal and a recording terminal. On the other hand, the proxy control terminal appears to the playback terminal and the recording terminal as a control terminal via the home network.

  FIG. 2 is a system configuration diagram according to the present invention. FIG. 2A shows a case where the proxy control terminal is a cradle. FIG. 2B shows a case where the proxy control terminal is a default gateway.

  According to FIG. 2A, a “cradle” as the proxy control terminal 1 is connected to the home network. The cradle can be mounted with a control terminal such as a mobile phone, and generally has a charging function for the mobile phone. Further, the cradle 1 can communicate a packet corresponding to the home network protocol between the plurality of playback terminals 3 and recording terminals 4.

  The home network protocol is, for example, a DLNA compliant protocol. In this case, the playback terminal 3 functions as DLNA-compatible DMP or M-DMP (Mobile-DMP), or as DLNA-compatible DMR or M-DMR. The recording terminal 4 functions as a DLNA-compliant DMS or M-DMS. Furthermore, the control terminal 2 functions as a DLNA-compliant DMC or M-DMC. Furthermore, the playback terminal 3 functions as an HTTP client with respect to the recording terminal 4.

  Here, for example, it is assumed that a family trip to Okinawa and a photograph (digital image) taken there is recorded in a first recording terminal (for example, a hard disk recorder). Also, it is assumed that music from an Okinawan singer is recorded on a second recording terminal (for example, a CD / DVD player). Here, the proxy control terminal 2 has distribution policy information that associates the attribute information of the photo stored in the first recording terminal with the attribute information of the music stored in the second recording terminal.

  It is assumed that the user operates the control terminal 2 in order to reproduce the Okinawa travel photograph recorded on the first recording terminal on the first reproduction terminal (for example, a digital photo frame). The control terminal 2 transmits the first control request message to the proxy control terminal 1.

  The proxy control terminal 1 searches for the second content related to the first content based on the first control request message. Then, a second control request message in the second content is newly generated. The second control request message is, for example, content that should be played by a second playback terminal (for example, a music player) of music from an Okinawan singer recorded on the second recording terminal. The proxy control terminal 1 transmits a first control request message to the first reproduction terminal, and transmits a second control request message to the second reproduction terminal.

  As a result, when a user operates to reproduce a photograph (digital image) of an Okinawa trip with a photo frame, the music of an Okinawan singer is simultaneously reproduced from the music player based on the distribution policy information. That is, according to the present invention, other content corresponding to the distribution policy information can be cooperatively reproduced in response to the control request message transmitted from the control terminal 2.

  According to FIG. 2B, the “default gateway” as the proxy control terminal 1 is connected to the home network. The default gateway is, for example, a home gateway, and all packets in the home network pass through. Therefore, the default gateway can also function as a proxy control terminal between the control terminal 2, the playback terminal 3, and the recording terminal 4.

  FIG. 3 is an explanatory diagram showing the correspondence between content attribute information and distribution policy information.

The proxy control terminal 1 has a content attribute storage unit and a distribution policy storage unit. The content attribute storage unit stores attribute information of content accumulated in the recording terminal. Examples of attribute information include the following elements.
・ "Recording terminal address (URI)" to record the content
・ "Playback terminal address (URI)" to play the content
・ "Date and time" when the content was created
・ "Position" where the content was created
(It may be a place name or a latitude / longitude acquired by GPS (Global Positioning System))
・ "Keyword" that the content represents

The distribution policy storage unit stores distribution policy information that associates a plurality of attribute information based on a predetermined condition. Examples of the distribution policy information include the following elements.
-"Date / time range" (year / month / day to year / month / day)
・ "Location range" (prefecture city range, latitude / longitude range)
·"keyword"
When the element of the attribute information of the first content corresponds to any element of the distribution policy information, the second content to be reproduced is searched simultaneously.

FIG. 3 shows content attribute information and distribution policy information.
[Content A]: Image (Photo taken in Okinawa trip)
Recording terminal address (URI): Address of the first recording terminal Playback terminal address (URI): Address of the first playback terminal Date: January 2, 2009 Location: Okinawa Keywords: Family travel [Content B]: Music ( (Song from Okinawa)
Recording terminal address (URI): address of the second recording terminal Playback terminal address (URI): address of the second playback terminal Keyword: Okinawa [content C]: image (map of Okinawa)
Recording terminal address (URI): Address of the second recording terminal Playback terminal address (URI): Address of the third playback terminal Position: Okinawa Keyword: Map [Content D]: Video (Presentation scene at conference presentation)
Recording terminal address (URI): Address of the first recording terminal Playback terminal address (URI): Address of the third playback terminal Date: June 3, 2009 Location: Tokyo Keyword: Conference presentation

  It is assumed that the control terminal 2 transmits a control request message for reproducing the content A to the proxy control terminal 1 by a user operation. At this time, the proxy control terminal 1 detects the attribute information “position: Okinawa” of the content A. It is also assumed that “Okinawa” is registered in the distribution policy information. At this time, the proxy control terminal 1 searches for contents including “Okinawa”. According to FIG. 3, contents B and C are detected. Note that the content D is not associated with the content A based on the distribution policy information.

  Then, the proxy control terminal 1 transmits a control request message for reproducing the content A to the first reproduction terminal, and transmits a control request message for reproducing the content B to the second reproduction terminal. Further, a control request message for reproducing the content C is transmitted to the third reproduction terminal.

  FIG. 4 is a sequence diagram in the present invention.

(S41) The control terminal 2 transmits a search request (SEARCH / BROWSE) message to the proxy control terminal 1 by a user operation. On the other hand, the proxy control terminal 1 transmits the search request message to the home network. According to FIG. 4, the proxy control terminal 1 transmits a search request (SEARCH) message to the playback terminal DMR and transmits a search request (SEARCH / BROWSE) message to the recording terminal DMS. The recording terminal DMS and the reproduction terminal DMR that have received the search request message return a response message to the control terminal DMC. The proxy control terminal 1 stores the content attribute information included in the response message in the content attribute storage unit. Then, the proxy control terminal 1 returns a response message to the control terminal 2.

(S42) The control terminal 2 displays the received content list on the display and causes the user to select content. Then, the control terminal 2 transmits a setting request POST (SetAV_TransportURI_1) message including the URI of the content selected by the user to the proxy control terminal 1.

  The proxy control terminal 1 uses the content attribute storage unit to search for the first attribute information corresponding to the first address (SetAV_TransportURI_1) of the first content. Next, the proxy control terminal 1 uses the distribution policy storage unit to search whether or not the first attribute information corresponds to the distribution policy information. Next, the proxy control terminal 1 searches the second address (SetAV_TransportURI_2) of the second content based on the second attribute information corresponding to the distribution policy information, using the content attribute storage unit.

  Then, the proxy control terminal 1 transmits a setting request POST (SetAV_TransportURI_1) message to the first address of the first content and sends a setting request POST (SetAV_TransportURI_2) message to the second address of the second content. Send. The first playback terminal can know the URI of the storage location of the first content, and the second playback terminal can know the URI of the storage location of the second content. Then, the first reproduction terminal and the second reproduction terminal return a response message to the proxy control terminal 1. The proxy control terminal 1 that has received the plurality of response messages returns the response message to the control terminal 2.

(S43) Next, the control terminal 2 transmits a reproduction request (PLAY) message of the content to the proxy control terminal 1. The proxy control terminal 1 transmits the reproduction request message to the first reproduction terminal and the second reproduction terminal in a multicast manner. The first playback terminal and the second playback terminal that have received the playback request message return a response message to the proxy control terminal 1, and the proxy control terminal 1 returns a response message to the control terminal 2.

(S44) The first playback terminal and the second playback terminal that have received the playback request (PLAY) message transmit a playback request (HTTP GET) message to the first recording terminal and the second recording terminal, respectively. On the other hand, the first recording terminal and the second recording terminal respectively return a response message to the first playback terminal and the second playback terminal.

(S45) Thereby, the first recording terminal transmits the first content to the first reproduction terminal, and the second recording terminal transmits the second content to the second reproduction terminal. The user can view the second content that is simultaneously played back in a cooperative manner, even though only the playback of the first content has been operated.

  When the control terminal 2 transmits a first content stop request message to the proxy control terminal 1 by the user's operation, the proxy control terminal 1 plays the first content. Then, a stop request message is transmitted to the second playback terminal that plays back the second content.

  FIG. 5 is a functional configuration diagram of the proxy control terminal according to the present invention.

  According to FIG. 5, the proxy control terminal 1 includes a cradle connection unit 101 that connects the control terminal 2 and a communication interface unit 102 that connects to the home network. In the case of FIG. 2B, the cradle connection unit 101 is replaced with a communication interface unit.

  Further, according to FIG. 5, the proxy control terminal 1 includes a content attribute storage unit 111 and a distribution policy storage unit 112. Further, the proxy control terminal 1 includes a control request message receiving unit 121, a first content search unit 122, a distribution policy search unit 123, a second content storage unit 124, a multicast transmission unit 125, and a control response message. A receiving unit 126 and a control response message transmitting unit 127 are included. These functional components are functioned by executing a program that causes a computer installed in the proxy control terminal to function.

  The content attribute storage unit 111 stores content attribute information accumulated in the recording terminal 4. The content attribute information can be acquired by a response message to the search request message, for example.

  The distribution policy storage unit 112 stores distribution policy information that associates a plurality of pieces of attribute information based on a predetermined condition.

  The control request message receiving unit 121 receives a control request message for the first content from the control terminal. The control request message is, for example, a search request, a setting request, and a reproduction request. The address of the first content included in the control request message is output to the first content search unit 122.

  The first content search unit 122 uses the content attribute storage unit 111 to search for the first attribute information of the first content. The searched first attribute information is output to the distribution policy search unit 123.

  The distribution policy search unit 123 uses the distribution policy storage unit 112 to search whether the first attribute information corresponds to the distribution policy information. When the first attribute information corresponds to the distribution policy information, the distribution policy information is output to the second content storage unit 124.

  Using the content attribute storage unit 111, the second content storage unit 124 searches for a second address of the second content based on the second attribute information corresponding to the distribution policy information. The second address is output to multicast transmission section 125.

  The multicast transmission unit 125 transmits a control request message to each of the first address of the first content and the second address of the second content.

  The control response message receiving unit 126 receives response messages from the plurality of playback terminals 3. Then, the control response message transmission unit 127 transmits one response message to the control terminal 2.

  As described above in detail, according to the content cooperative playback method, proxy control terminal, and program of the present invention, when the control terminal plays back the first content using the recording terminal and the playback terminal, The second content related to the content can be simultaneously played back using different recording terminals and playback terminals.

  Various changes, modifications, and omissions of the above-described various embodiments of the present invention can be easily made by those skilled in the art. The above description is merely an example, and is not intended to be restrictive. The invention is limited only as defined in the following claims and the equivalents thereto.

DESCRIPTION OF SYMBOLS 1 Proxy control terminal 101 Cradle connection part 102 Communication interface part 111 Content attribute memory | storage part 112 Distribution policy memory | storage part 121 Control request message receiver 122 First content search part 123 Distribution policy search part 124 Second content memory part 125 Multicast transmission Unit 126 Control response message reception unit 127 Control response message transmission unit 2 Control terminal 3 Playback terminal 4 Recording terminal

Claims (11)

A content cooperative playback method from a control terminal in a system in which a plurality of playback terminals compatible with a home network protocol and a plurality of recording terminals are connected to a network,
A proxy control terminal is further connected to the network,
The control terminal is connected to the proxy control terminal;
The proxy control terminal includes a content policy storage unit that stores content attribute information stored in the recording terminal, and a distribution policy storage unit that stores distribution policy information that associates a plurality of attribute information based on a predetermined condition. And
A first step in which the control terminal transmits a control request message for first content to the proxy control terminal;
A second step in which the proxy control terminal searches for first attribute information of first content using the content attribute storage unit;
A third step in which the proxy control terminal searches for whether or not the first attribute information corresponds to the distribution policy information using the distribution policy storage unit;
A fourth step in which the proxy control terminal searches for a second address of the second content based on the second attribute information corresponding to the distribution policy information using the content attribute storage unit;
Content coordination, characterized in that the proxy control terminal has a fifth step of transmitting the control request message to a first address of first content and a second address of second content. Playback method. The attribute information is a creation date and time, a creation position and / or a keyword of the content,
2. The content cooperative reproduction method according to claim 1, wherein the distribution policy information is a certain time range, a certain region range, and / or a keyword.   The content cooperative reproduction method according to claim 1 or 2, wherein the proxy control terminal is a cradle on which the control terminal can be placed. The proxy control terminal is a default gateway connected to the network;
The content cooperative reproduction method according to claim 1 or 2, wherein the control request message transmitted from the control terminal is transmitted to the reproduction terminal and the recording terminal via the default gateway. The home network protocol is a DLNA (Digital Living Network Alliance) compliant protocol,
The playback terminal functions as DLNA compatible DMP (Digital Media Player) or M-DMP (Mobile-DMP), or DLNA compatible DMR (Digital Media Renderer) or M-DMR (Mobile-DMR),
The recording terminal functions as a DLNA compatible DMS (Digital Media Server) or M-DMS (Mobile-DMS),
The control terminal functions as a DLNA compatible DMC (Digital Media Controller) or M-DMC (Mobile-DMC),
The playback terminal functions as an HTTP (HyperText Transfer Protocol) client to the recording terminal,
The control request message transmitted from the control terminal to the proxy control terminal is a search request (SEARCH / BROWSE method), a setting request (SetAV_TransportURI action in a POST method), and a playback request (PLAY method). Item 5. The content cooperative reproduction method according to any one of Items 1 to 4. For a system in which a plurality of playback terminals and a plurality of recording terminals compatible with a home network protocol are connected to a network, the proxy control terminal is connected to the network and to a control terminal,
Content attribute storage means for storing attribute information of the content accumulated in the recording terminal;
Distribution policy storage means for storing distribution policy information for associating a plurality of attribute information based on a predetermined condition;
Control request message receiving means for receiving a control request message for the first content from the control terminal;
First content search means for searching for first attribute information of the first content using the content attribute storage means;
Distribution policy search means for searching whether or not the first attribute information corresponds to distribution policy information using the distribution policy storage means;
Second content search means for searching for a second address of second content based on second attribute information corresponding to the distribution policy information using the content attribute storage means;
A proxy control terminal comprising multicast transmission means for transmitting the control request message to a first address of first content and a second address of second content. The attribute information is a creation date and time, a creation position and / or a keyword of the content,
The proxy control terminal according to claim 6, wherein the distribution policy information is a certain time range, a certain region range, and / or a keyword.   The proxy control terminal according to claim 6 or 7, wherein the proxy control terminal is a cradle on which the control terminal can be placed. The proxy control terminal is a default gateway connected to the network;
The proxy control terminal according to claim 6 or 7, wherein the control request message transmitted from the control terminal is transmitted to the reproduction terminal and the recording terminal via the default gateway. The home network protocol is a DLNA compliant protocol;
The playback terminal functions as DLNA-compatible DMP or M-DMP, or DLNA-compatible DMR or M-DMR,
The recording terminal functions as a DLNA-compliant DMS or M-DMS,
The control terminal functions as a DLNA-compliant DMC or M-DMC,
The playback terminal functions as an HTTP client to the recording terminal,
The control request message transmitted from the control terminal to the proxy control terminal is a search request (SEARCH / BROWSE method), a setting request (SetAV_TransportURI action in a POST method), and a playback request (PLAY method). Item 10. The proxy control terminal according to any one of Items 6 to 9. A program for functioning a computer mounted on a proxy control terminal that is connected to the network and connected to the control terminal for a system in which a plurality of playback terminals and a plurality of recording terminals compatible with the home network protocol are connected to the network. There,
Content attribute storage means for storing attribute information of the content accumulated in the recording terminal;
Distribution policy storage means for storing distribution policy information for associating a plurality of attribute information based on a predetermined condition;
Control request message receiving means for receiving a control request message for the first content from the control terminal;
First content search means for searching for first attribute information of the first content using the content attribute storage means;
Distribution policy search means for searching whether or not the first attribute information corresponds to distribution policy information using the distribution policy storage means;
Second content search means for searching for a second address of second content based on second attribute information corresponding to the distribution policy information using the content attribute storage means;
A program for a proxy control terminal, which causes a computer to function as multicast transmission means for transmitting the control request message to a first address of first content and a second address of second content.

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