CN102694836A - Method, device and system for realizing rendering broadcast - Google Patents
Method, device and system for realizing rendering broadcast Download PDFInfo
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- CN102694836A CN102694836A CN2011102202199A CN201110220219A CN102694836A CN 102694836 A CN102694836 A CN 102694836A CN 2011102202199 A CN2011102202199 A CN 2011102202199A CN 201110220219 A CN201110220219 A CN 201110220219A CN 102694836 A CN102694836 A CN 102694836A
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Abstract
The invention discloses a method, a device and a system for realizing rendering broadcast. The method comprises the following steps of: connecting one proxy server between a rendering broadcast server and a broadcast control terminal, and storing a broadcast preparing command in a broadcast preparing list form after monitoring the broadcast preparing command sent by the broadcast control terminal; receiving a broadcast command sent by the broadcast control terminal; analyzing the broadcast command sent by the broadcast control terminal, and searching the broadcast preparing command corresponding to the broadcast command sent by the broadcast control terminal in the broadcast preparing list; acquiring the broadcast content corresponding to the broadcast preparing command from the proxy server according to the broadcast preparing command; and forwarding the broadcast command to the rendering broadcast server, and broadcasting the broadcast content corresponding to the obtained broadcast preparing command by the rendering broadcast server. The broadcast command in the method can be transmitted to the rendering broadcast server after certain delay or meeting certain requirement, so that the accurate broadcast of the broadcast content is realized.
Description
Technical field
The present invention relates to the picture and text technical field of video production, relate in particular to a kind of method, equipment and system that realizes playing up broadcast.
Background technology
In the videography packaging system, realize playing up when broadcasting of video content, play up broadcasting server and receive rendering command, play up each scene by different level.But in practical application, often there is a Play Control end; The Play Control end is with at all levels; The resource of each scene and replacement etc. is ready to, and then according to time requirement, carries out transmitting control commands chronologically; Play up broadcasting server and resolve, play up then playing up control command.
In the prior art Play Control end directly with play up broadcasting server and carry out straight-forward network Socket and be connected; Control end sends Template Information; Scene is play ready message, comprises data that institute will replace, picture path etc., and control end also sends and broadcasts orders such as order perhaps suspends, cancels; Play up broadcasting server directly to the command response of control end and feed back, mentioned order all transmits through network Socket port.。
The inventor finds that there is following technical problem in prior art in the process of embodiment of the present invention:
Play up broadcasting server and directly respond this order, bear heavylier, and operation is that Netz ocket connects, and order transmits and has problems such as time-delay is long.Play up broadcasting server and directly accept the order of control end, in case order wrong operation such as cause playing, other operations of broadcasting server are played up in influence.
Summary of the invention
In order to solve the shortcoming of above-mentioned prior art; Main purpose of the present invention provides a kind of method, equipment and system that realizes playing up broadcast; Adopt agent software to carry out the centre and connect, receive the order that control end sends, then through resolving; Even redispatch to playing up broadcasting server after can certain time-delay or after meeting certain requirements, realize that the normal of play content accurately play.
In order to achieve the above object, the invention provides a kind of method that realizes playing up broadcast, this method specifically comprises:
After the broadcast warning order that listens to the transmission of Play Control end, it is prepared the tabular form storage to broadcast, and play up warning order, comprise the broadcast content of correspondence in the said broadcast warning order to playing up the broadcasting server transmission;
Receive the broadcast order that said Play Control end sends;
Resolve the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to search in the tabulation said Play Control end transmission;
Obtain the corresponding broadcast content of said broadcast warning order according to said broadcast warning order;
Transmit said broadcast and order to playing up broadcasting server, the corresponding broadcast content of said broadcast warning order is carried in said broadcast order, and the said broadcasting server of playing up broadcasts the corresponding broadcast content of said broadcast warning order.
Another aspect of the present invention also provides a kind of acting server of realizing playing up broadcast, and this acting server comprises:
Monitoring unit is used for after the broadcast warning order that listens to the transmission of Play Control end, it being prepared the tabular form storage to broadcast, and plays up warning order to playing up the broadcasting server transmission, comprises the broadcast content of correspondence in the said broadcast warning order;
Receiving element is used to receive the broadcast order that said Play Control end sends;
Resolution unit is used for resolving the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to tabulate and searching said Play Control end transmission;
Acquiring unit is used for obtaining the corresponding broadcast content of said broadcast warning order according to said broadcast warning order at acting server;
Retransmission unit is used to transmit said broadcast and orders to playing up broadcasting server, and the corresponding broadcast content of said broadcast warning order is carried in said broadcast order, and the said broadcasting server of playing up broadcasts the corresponding broadcast content of said broadcast warning order.
One side more of the present invention also provides a kind of system that realizes playing up broadcast, and this system comprises:
Said Play Control end is used for generating and broadcasts warning order and broadcast order;
Said acting server is used for after the broadcast warning order that listens to the transmission of Play Control end, it being prepared the tabular form storage to broadcast, and plays up warning order to playing up the broadcasting server transmission, comprises the broadcast content of correspondence in the said broadcast warning order; Receive the broadcast order that said Play Control end sends; Resolve the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to search in the tabulation said Play Control end transmission; Obtain the corresponding broadcast content of said broadcast warning order according to said broadcast warning order; Transmit said broadcast and order to playing up broadcasting server, the corresponding broadcast content of said broadcast warning order is carried in said broadcast order;
The said broadcasting server of playing up after being used to receive the broadcast order of said acting server forwarding, broadcasts the corresponding broadcast content of said broadcast warning order.
Execution mode of the present invention carries out the centre and is connected through adopting acting server to play up in Play Control end and broadcast between the server; Receive the order that the Play Control end sends; Then through resolving; Even redispatch to playing up broadcasting server after can certain time-delay or after meeting certain requirements, realize that the normal of play content accurately play.
Description of drawings
Technical scheme for the clearer explanation embodiment of the invention; The accompanying drawing of required use is done simple the introduction in will describing embodiment below; Conspicuous, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is for realizing playing up the method flow diagram of broadcast in the embodiment of the invention;
Fig. 2 is for realizing playing up the method flow diagram of broadcast in another embodiment of the present invention;
Fig. 3 constitutes sketch map for realizing the acting server of playing up broadcast in the embodiment of the invention;
Fig. 4 is for realizing playing up the system block diagram of broadcast in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, complete description; Obvious described embodiment only is a part of embodiment of the present invention, is not whole embodiment, based on the embodiment among the present invention; Those of ordinary skills are not paying the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
A kind of method that realizes playing up broadcast is provided in the embodiment of the invention one on the one hand; Adopting acting server to carry out the centre connects; Acting server adopts serial ports to be connected with the Play Control end, and receives the order that the Play Control end sends, and is transmitted to then and plays up broadcasting server; Concrete realization can specifically comprise referring to Fig. 1:
Step S101: monitor Play Control end and the control command of playing up of playing up broadcasting server, after listening to the broadcast warning order that the Play Control end sends, it is prepared the tabular form storage to broadcast, send and play up warning order to playing up broadcasting server simultaneously.
Preferably; Acting server just gets into the state to specifying Socket port and serial ports to monitor automatically after playing up the broadcasting server os starting; Broadcasting server and the Play Control end control command to its transmission and feedback is played up in reception; This control command comprises the initialization control command, broadcasts control command and general feedback command etc.
Initialization control is meant startup, closes or restarts broadcasting server, obtains current standard, and server state obtains, and server version is obtained, and imports template etc.
Broadcast control and be meant and broadcast relevant broadcasting such as preparing, broadcast suspends, and removes, and continues etc.
Feedback command comprises control broadcast passage, and contextual data is set, and obtains scene state, obtains scene information, obtains orders such as scene picture.
After the broadcast warning order is issued and is played up broadcasting server; Play up broadcasting server and can carry out operations such as prestrain to the scene that needs broadcast according to playing up the broadcast instruction; And can carry out caching process according to render content, if such as picture is arranged, picture is bigger; It is medium to consider to join earlier the video card buffer memory, improves rendering efficiency.
Step S102: receive the broadcast order that said Play Control end sends.
Preferably, broadcast control command and can adopt serial port command and/or networking command to transmit, but when timing property was strong, the broadcast that then receives the transmission of Play Control end ordered the serial port command through serial ports to receive.
Step S103: resolve the broadcast order of said Play Control end transmission and search the corresponding broadcast warning order of broadcast order that said Play Control end sends.
Preferably, the order of the Play Control end that proxy server parses receives can be recombinated, preliminary treatment or inspection order redispatch to playing up broadcasting server after arriving certain fail safe, avoids unnecessary mistake.
And, acting server can be with the execution result of the broadcast that is resolved to order command format during with original the reception feed back to the Play Control end.
Step S104: in broadcasting the preparation tabulation, find the corresponding warning order of broadcasting based on said broadcast order; Broadcasting in the warning order is to include the content that needs broadcast, and can broadcast warning order based on this then and get access to broadcast content corresponding on the acting server.
Step S105: transmit and broadcast order to playing up broadcasting server, the corresponding broadcast content of said broadcast warning order is carried in said broadcast order, and the said broadcasting server of playing up broadcasts the corresponding broadcast content of said broadcast warning order.
Execution mode of the present invention carries out the centre and is connected through adopting acting server to play up in Play Control end and broadcast between the server; Receive the order that the Play Control end sends; Then through resolving; Even redispatch to playing up broadcasting server after can certain time-delay or after meeting certain requirements, realize that the normal of play content accurately play.
The embodiment of the invention two will be done further detailed description with practical application to realizing the method for playing up broadcast among the embodiment one, not regard it as certainly and exceed.
In the embodiment of the invention, acting server is connected with the Play Control end, and acting server with play up broadcasting server and on same main frame, be connected; Be responsible for the intermediate transport of all rendering command, comprise server startup, restart, close, and template loads; The preparation of template, cancelling of preparation broadcasted; Remove, remove and operations such as broadcast that special screne flew the end of such as and Data Update.
In the embodiment of the invention; The order transfer mode is divided into through the transmission of Ethernet Socket port with through two kinds of RS422 serial ports transmission; More weak and the then employing Ethernet socket port transmission that data volume is bigger for timing; Can adopt serial ports to transmit to the stronger order of timing, be called networking command and serial port command respectively; Above complete order all has the networking command form, and a part need be guaranteed to transmit choke free order and have the serial port command form simultaneously.
Below respectively the basic format of networking command and serial port command is introduced:
The networking command that transmits through Socket all be double byte Unicode character string (but do not have 0 save trailing character), follows the XML form, with " < M5APCmd>" to start with and end mark.For example:
<M5APCmd>
<CmdType>OpenServer</CmdType>
<CmdSender>CCTV_Ctrl_0</CmdSender>
......
</M5APCmd>
Wherein, < CmdType>indicates command type, and < CmdSender>indicates the title of order transmitting apparatus, and these two appear in each Socket order; All other are the data item of each order.
Serial port command is a string byte.Form is following:
Serial port command and type code thereof comprise:
2 supplementary set of lowest byte: to all negates of initial value, again this value is added 1, ignore and overflow.
Send the broadcast order with the Play Control end in the embodiment of the invention, play up and broadcast to example is elaborated, concrete implementation is as shown in Figure 2:
Step S201: the Play Control end sent before broadcasting and broadcasts warning order to acting server, and the broadcast warning order that acting server will receive is stored with tabular form.This broadcast warning order comprises: broadcast contextual data, broadcast scene state and broadcast scene unique ID etc.
Step S202: acting server receives the Play Control end through networking command or serial port command and sends the broadcast order, and in broadcast prepares to tabulate, searches corresponding broadcast preparation instruction according to the broadcast scene unique ID of broadcasting in the warning order.
Preferably, after acting server receives and broadcasts order, send feedback command to the Play Control end based on the command format (networking command or serial port command) of actual conditions when receiving.
Step S203: in acting server, obtain corresponding broadcast content according to said broadcast warning order.
Step S204: after getting access to corresponding broadcast content, the broadcast order that acting server is transmitted the Play Control end through networking command is played up broadcasting server and is broadcasted corresponding contents.
Preferably, acting server can also be recombinated or preliminary treatment to the broadcast order that receives, and detects whether said broadcast order is safe; Whether can carry out; Transmit to the said broadcasting server of playing up as if carrying out then,, then send error reporting or time-delay transmission if can not carry out.
In the embodiment of the invention acting server with play up broadcasting server on same main frame; If yet under the less demanding situation of real-time, acting server can with play up broadcasting server and be contained in respectively on the different main frames, and acting server is less demanding to main frame; Only need the simple networking command that receives and send; On the low main frame of configuration, just can move, play up broadcasting server and then be installed on the higher main frame of configuration, can realize the design of this intermediate buffering equally.An acting server can be controlled a plurality of servers of playing up simultaneously, plays up server controls to many and plays up broadcast.
Execution mode of the present invention carries out the centre and is connected through adopting acting server to play up in Play Control end and broadcast between the server; Receive the order that the Play Control end sends; Then through resolving; Even redispatch to playing up broadcasting server after can certain time-delay or after meeting certain requirements, realize that the normal of play content accurately play.
A kind of acting server of realizing playing up broadcast is provided in the embodiment of the invention three, and as shown in Figure 3, this acting server comprises:
Monitoring unit 31 is used for after the broadcast warning order that listens to the transmission of Play Control end, it being prepared the tabular form storage to broadcast, and plays up warning order to playing up the broadcasting server transmission, comprises the broadcast content of correspondence in the said broadcast warning order.
Receiving element 32 is used to receive the broadcast order that said Play Control end sends.
Acquiring unit 34 is used for obtaining the corresponding broadcast content of said broadcast warning order according to said broadcast warning order at acting server.
Wherein, said receiving element 32 also comprises:
Networking command receives subelement 321, is used to receive the broadcast warning order networking command corresponding with broadcasting order that the Play Control end sends;
Serial port command receives subelement 322, is used to receive the broadcast warning order serial port command corresponding with broadcasting order that the Play Control end sends.
And resolution unit 33 also comprises:
Whether detection sub-unit 331 is used to detect said broadcast order and can carries out, and transmits to the said broadcasting server of playing up if can carry out then, if can not carry out, then sends error reporting.
Networking command feedback subelement 351 is used for that networking command is received Play Control end broadcast warning order of sending and the execution result that broadcasts order that subelement receives and feeds back to said Play Control end;
Serial port command feedback subelement 352 is used for that serial port command is received Play Control end broadcast warning order of sending and the execution result that broadcasts order that subelement receives and feeds back to said Play Control end.
Execution mode of the present invention carries out the centre and is connected through adopting acting server to play up in Play Control end and broadcast between the server; Receive the order that the Play Control end sends; Then through resolving; Even redispatch to playing up broadcasting server after can certain time-delay or after meeting certain requirements, realize that the normal of play content accurately play
The embodiment of the invention four also provides a kind of system that realizes playing up broadcast, and is as shown in Figure 4, and this system comprises:
Said Play Control end 41 is used for generating and broadcasts warning order and broadcast order;
Said acting server 42 is used for after the broadcast warning order that listens to the transmission of Play Control end, it being prepared the tabular form storage to broadcast, and plays up warning order to playing up the broadcasting server transmission, comprises the broadcast content of correspondence in the said broadcast warning order; Receive the broadcast order that said Play Control end sends; Resolve the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to search in the tabulation said Play Control end transmission; Obtain the corresponding broadcast content of said broadcast warning order according to said broadcast warning order; Transmit said broadcast and order to playing up broadcasting server, the corresponding broadcast content of said broadcast warning order is carried in said broadcast order;
The said broadcasting server 43 of playing up after being used to receive the broadcast order of said acting server forwarding, broadcasts the corresponding broadcast content of said broadcast warning order.
Execution mode of the present invention carries out the centre and is connected through adopting acting server to play up in Play Control end and broadcast between the server; Receive the order that the Play Control end sends; Then through resolving; Even redispatch to playing up broadcasting server after can certain time-delay or after meeting certain requirements, realize that the normal of play content accurately play.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through software, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; Technical scheme of the present invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above; Be merely a best specific embodiment of the present invention, but characteristic of the present invention is not limited thereto, any people who is familiar with this technology is in field of the present invention; The variation that can expect easily or modification all should be encompassed in the following claim of the present invention.
Claims (12)
1. the method for broadcast is played up in a realization, it is characterized in that this method comprises:
After the broadcast warning order that listens to the transmission of Play Control end, it is prepared the tabular form storage to broadcast, and play up warning order, comprise the broadcast content of correspondence in the said broadcast warning order to playing up the broadcasting server transmission;
Receive the broadcast order that said Play Control end sends;
Resolve the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to search in the tabulation said Play Control end transmission;
Obtain the corresponding broadcast content of said broadcast warning order according to said broadcast warning order;
Transmit said broadcast and order to playing up broadcasting server, the corresponding broadcast content of said broadcast warning order is carried in said broadcast order, and the said broadcasting server of playing up broadcasts the corresponding broadcast content of said broadcast warning order.
2. the method for broadcast is played up in realization as claimed in claim 1, it is characterized in that, also comprises monitoring Play Control end and the control command of playing up of playing up broadcasting server, and the said control command of playing up comprises:
The initialization control command is broadcasted control command and general feedback command.
3. the method for broadcast is played up in realization as claimed in claim 1, it is characterized in that, broadcasts warning order, broadcasts to order with networking command and/or serial port command form and transmit:
The broadcast order that the said Play Control end of broadcast warning order that the Play Control end that listens to sends and reception sends is networking command and/or serial port command;
Be networking command to playing up broadcasting server sends play up warning order and be transmitted to the broadcast order of playing up broadcasting server.
4. the method for broadcast is played up in realization as claimed in claim 3, it is characterized in that, the broadcast warning order of transmission is specially with the command format that broadcasts order:
The broadcast warning order of said transmission all has the networking command form with the command format that broadcasts order, need guarantee to transmit choke free order and have the serial port command form simultaneously.
5. the method for broadcast is played up in realization as claimed in claim 3, it is characterized in that, said networking command form is specially:
Whole strings of double-byte characters, and do not have 0 ending character, follow the expandable mark language XML form.
6. the method for broadcast is played up in realization as claimed in claim 3, it is characterized in that, comprises in the said networking command:
The title of the type of order and order transmitting apparatus.
7. the method for broadcast is played up in realization as claimed in claim 1, it is characterized in that, said forwarding is broadcasted order and comprised to before playing up broadcasting server:
Whether reorganization, the said broadcast of preliminary treatment are ordered or are detected said broadcast order and can carry out, and transmit to the said broadcasting server of playing up if can carry out then, if can not carry out, then send error reporting;
Execution result is fed back to the Play Control end.
8. the acting server of broadcast is played up in a realization, it is characterized in that said acting server comprises:
Monitoring unit is used for after the broadcast warning order that listens to the transmission of Play Control end, it being prepared the tabular form storage to broadcast, and plays up warning order to playing up the broadcasting server transmission, comprises the broadcast content of correspondence in the said broadcast warning order;
Receiving element is used to receive the broadcast order that said Play Control end sends;
Resolution unit is used for resolving the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to tabulate and searching said Play Control end transmission;
Acquiring unit is used for obtaining the corresponding broadcast content of said broadcast warning order according to said broadcast warning order at acting server;
Retransmission unit is used to transmit said broadcast and orders to playing up broadcasting server, and the corresponding broadcast content of said broadcast warning order is carried in said broadcast order, and the said broadcasting server of playing up broadcasts the corresponding broadcast content of said broadcast warning order.
9. the acting server of broadcast is played up in realization as claimed in claim 8, it is characterized in that, said resolution unit also comprises:
Whether detection sub-unit is used to detect said broadcast order and can carries out, and transmits to the said broadcasting server of playing up if can carry out then, if can not carry out, then sends error reporting;
Judgment sub-unit is used to judge that the order that receives or transmit is networking command or serial port command.
10. the acting server of broadcast is played up in realization as claimed in claim 8, it is characterized in that, said receiving element also comprises:
Networking command receives subelement, is used to receive the broadcast warning order networking command corresponding with broadcasting order that the Play Control end sends;
Serial port command receives subelement, is used to receive the broadcast warning order serial port command corresponding with broadcasting order that the Play Control end sends.
11. the acting server of broadcast is played up in realization as claimed in claim 8, it is characterized in that, said retransmission unit also comprises:
Networking command feedback subelement is used for that networking command is received Play Control end broadcast warning order of sending and the execution result that broadcasts order that subelement receives and feeds back to said Play Control end;
Serial port command feedback subelement is used for that serial port command is received Play Control end broadcast warning order of sending and the execution result that broadcasts order that subelement receives and feeds back to said Play Control end.
12. the system of broadcast is played up in a realization, it is characterized in that, this system comprises Play Control end, acting server and plays up broadcasting server, wherein,
Said Play Control end is used for generating and broadcasts warning order and broadcast order;
Said acting server is used for after the broadcast warning order that listens to the transmission of Play Control end, it being prepared the tabular form storage to broadcast, and plays up warning order to playing up the broadcasting server transmission, comprises the broadcast content of correspondence in the said broadcast warning order; Receive the broadcast order that said Play Control end sends; Resolve the broadcast order of said Play Control end transmission and broadcasting the corresponding broadcast warning order of broadcast order of preparing to search in the tabulation said Play Control end transmission; Obtain the corresponding broadcast content of said broadcast warning order according to said broadcast warning order; Transmit said broadcast and order to playing up broadcasting server, the corresponding broadcast content of said broadcast warning order is carried in said broadcast order;
The said broadcasting server of playing up after being used to receive the broadcast order of said acting server forwarding, broadcasts the corresponding broadcast content of said broadcast warning order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220219.9A CN102694836B (en) | 2011-08-02 | 2011-08-02 | A kind of realization renders the method for broadcast, equipment and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220219.9A CN102694836B (en) | 2011-08-02 | 2011-08-02 | A kind of realization renders the method for broadcast, equipment and system |
Publications (2)
| Publication Number | Publication Date |
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| CN102694836A true CN102694836A (en) | 2012-09-26 |
| CN102694836B CN102694836B (en) | 2016-08-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101094136A (en) * | 2006-06-23 | 2007-12-26 | 阿尔卡特公司 | System and method for supporting playlist guidance of digital multimedia content |
| CN101594238A (en) * | 2008-05-30 | 2009-12-02 | 华为技术有限公司 | A kind of media playing method, system and broadcast agent apparatus |
| US20110162020A1 (en) * | 2009-12-29 | 2011-06-30 | Kahn Raynold M | Method and system for operating a multi-room digital video recording system |
-
2011
- 2011-08-02 CN CN201110220219.9A patent/CN102694836B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101094136A (en) * | 2006-06-23 | 2007-12-26 | 阿尔卡特公司 | System and method for supporting playlist guidance of digital multimedia content |
| CN101594238A (en) * | 2008-05-30 | 2009-12-02 | 华为技术有限公司 | A kind of media playing method, system and broadcast agent apparatus |
| US20110162020A1 (en) * | 2009-12-29 | 2011-06-30 | Kahn Raynold M | Method and system for operating a multi-room digital video recording system |
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| CN102694836B (en) | 2016-08-24 |
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