CN109672904A - A kind of radio and television cluster playback method and multimedia gateway device - Google Patents
A kind of radio and television cluster playback method and multimedia gateway device Download PDFInfo
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- CN109672904A CN109672904A CN201811543640.1A CN201811543640A CN109672904A CN 109672904 A CN109672904 A CN 109672904A CN 201811543640 A CN201811543640 A CN 201811543640A CN 109672904 A CN109672904 A CN 109672904A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2385—Channel allocation; Bandwidth allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/64—Addressing
- H04N21/6405—Multicasting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64746—Control signals issued by the network directed to the server or the client
- H04N21/64753—Control signals issued by the network directed to the server or the client directed to the client
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/858—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
- H04N21/8586—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot by using a URL
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
A kind of radio and television cluster playback method and multimedia gateway device, this method comprises: client connects multimedia gateway, client sends headend equipment connection request to multimedia gateway, multimedia gateway receiving front-end equipment connection request simultaneously connects headend equipment, stream medium data is sent to multimedia gateway by last headend equipment, which is transmitted to client by multimedia gateway.The needs of present invention realization continuously obtains more data from a capacity finite element network, meets the more users under limited network bandwidth while watching video all the way.
Description
Technical field
The present invention relates to broadcast television monitoring fields, and in particular to a kind of radio and television cluster playback method and multimedia network
Close device.
Background technique
Broadcast television monitoring is the quality for monitoring radio and television frequency range radio wave, to each ring such as broadcast, transmitting, transmission
The technical issues of section, exercises supervision inspection, view reception effect after broadcasting so as to grasp broadcast TV program accurately and timely or listens to
Effect, to the effect of publicity for improving radio and television, reinforcing broadcast and telecast work quality has important facilitation.
Multimedia gateway device is component part important in broadcast television monitoring net system, is to realize to real-time streams
The Streaming Media gateway of media forwarding and design.The Streaming Media gateway is mounted on central machine room, is to be directed to broadcast electricity
Depending on the product of monitoring net application design, exploitation, for forwarding the audio/video flow transmitted on monitoring front end.Design multimedia gateway is set
Standby purpose is the agreement by application layer control, and the audio/video flow all the way that multimedia gateway uploads is transmitted to multiple users,
To meet under limited network bandwidth, multiple users watch the demand of video all the way simultaneously.
Currently, multimedia gateway can be used to forward the Streaming Media number from monitoring front end in broadcast television monitoring system
According to the real-time video-voice frequency flow media including TV and broadcast in broadcast television monitoring net.Pass through a multimedia gateway service
Device, several monitoring stations in local area network can realize the same Media Stream all the way for concurrently accessing same front end, local area network and front end
The bandwidth for transmission stream medium data for occupying Media Stream all the way, by multimedia gateway server by stream medium data point in local area network
It is dealt into each work station.
The problem faced at present is how from a capacity finite element network continuously to obtain more data.Also
It is under limited network bandwidth, the needs of how meeting more users while watching video all the way.
Summary of the invention
(1) goal of the invention
The object of the present invention is to provide a kind of radio and television cluster playback methods and one kind based on application layer bandwidth sharing
Multimedia gateway device, realization continuously obtain more data from a capacity finite element network.
(2) technical solution
To solve the above problems, the first aspect of the present invention provides a kind of radio and television cluster playback method, including with
Lower step:
Step 1, client connects multimedia gateway；
Step 2, client sends headend equipment connection request to multimedia gateway；
Step 3, multimedia gateway receiving front-end equipment connection request and headend equipment is connected；
Step 4, stream medium data is sent to multimedia gateway by headend equipment, and multimedia gateway turns the stream medium data
Issue client.
One aspect of the present invention, multimedia gateway use the multi-threaded architecture based on broadcasting and TV multicast shared port.
One aspect of the present invention, the broadcasting and TV multicast shared port of multimedia gateway calls headend equipment to connect in step 3
Request intercepting thread is connect, the headend equipment connection request is received, establishes the connection with the headend equipment.
One aspect of the present invention, headend equipment connection request intercepting thread the following steps are included:
Step 31, the module of listening to of multimedia gateway has detected whether headend equipment connection request；
Step 32, if so, multimedia gateway receives request and connects headend equipment, if it is not, return step 31.
One aspect of the present invention, the broadcasting and TV multicast shared port of multimedia gateway calls shared port work in step 4
Make thread, from headend equipment receiving stream media data, is transmitted to client；
One aspect of the present invention, broadcasting and TV multicast shared port calls transmission of monitoring thread in step 4, and regular check is more
Whether the connection of Media Gateway and headend equipment and the connection of multimedia gateway and headend equipment have data transmission.
One aspect of the present invention, transmission of monitoring thread the following steps are included:
Step 41, the transmission of monitoring module detection last time of multimedia gateway receives or sends whether data are completed；
Step 42, if not completing, continue to or send data；Step 43 is gone to if being completed；
Step 43, transmission of monitoring module has detected whether new data；
Step 44, if so, forwarding new data, if nothing, return step 41.
One aspect of the present invention, client connect multimedia gateway by multimedia plug-in unit.
One aspect of the present invention, multimedia gateway, which is used, sends and receivees stream based on the open interface that Transmission Control Protocol is formulated
Media data.
One aspect of the present invention, multimedia gateway is according to the Media Stream uniform resource locator received from client
(URL) headend equipment is connected.
One aspect of the present invention, the multimedia gateway are distributed stream medium data using the ways of distribution of two-stage buffering
To multiple client.
One aspect of the present invention, the multimedia gateway establish one for each headend equipment and receive buffer area, are every
A client establishes a transmission buffer area, receives buffer area and sends buffer area by the way of single-track link table for multiple media
Frame data series connection.
One aspect of the present invention, the buffer area of headend equipment are the circular buffering of fixed size, the media of headend equipment
Data are constantly filled into buffer area, and when the buffer area of headend equipment is full, newest media frame data cover oldest matchmaker automatically
Body frame data.
One aspect of the present invention, when the buffer area of client is empty, by media frame number newest in equipment end buffer area
According to memory copying to client buffer area, after client connection is sent, then newest matchmaker is copied from headend equipment buffer area
Body frame data.
One aspect of the present invention, the multimedia gateway receive the routing table being made of multiple addresses, realize multistage turn
Hair.
One aspect of the present invention, the form of routing table character string indicate.
One aspect of the present invention, the multimedia gateway are interrupted and client or headend equipment by no data time-out
Connection.
One aspect of the present invention, the stream medium data include real-time video-voice frequency flow media.
Another aspect of the present invention provides and a kind of realizes radio and television cluster broadcasting side described in any of the above-described claim
The multimedia gateway device of method, which is characterized in that including listening to module, data transmitting module and transmission of monitoring module, listen to mould
Block is for detecting whether have headend equipment connection request, from client receiving front-end equipment connection request；Data transmitting module is used
In from headend equipment receiving stream media data, and stream medium data is sent to client；Transmission of monitoring module connects for monitoring
It receives or sends whether data are completed.A kind of multimedia for realizing radio and television cluster playback method described in any of the above-described claim
Gateway apparatus, the multimedia gateway device connection client and front end, client and front end are located at different networks, institute
Multimedia gateway is stated from client receiving front-end equipment connection request and connects headend equipment, the stream matchmaker that receiving front-end equipment is sent
Volume data is transmitted to client.
Another aspect of the present invention further includes the open interface formulated based on Transmission Control Protocol, for sending and receiving stream matchmaker
Volume data.
Another aspect of the present invention, further includes broadcasting and TV multicast shared port and broadcasting and TV multicast shared port thread pool, extensively
Electric multicast shared port calls the thread in broadcasting and TV multicast shared port thread pool, before broadcasting and TV multicast shared port thread pool includes
End equipment connection request intercepting thread, shared port worker thread and transmission of monitoring thread.
In conclusion proposing a kind of radio and television cluster the present invention is based on the simplified model that broadcast television signal is propagated
Playback method and a kind of multimedia gateway device are realized using novel broadcasting and TV multicast shared port mechanism in limited network
More users are supported to watch video all the way simultaneously under bandwidth.The present invention can reach following performance: firstly, in client and media
When acquiring the one-to-one access in front end, the media data on most roads 40-50 can be supported to forward.Secondly, in client and acquisition of media
When front end many-one accesses, the media data on most roads 80-100 can be supported to forward.Finally, stream medium data Forwarding Latency does not surpass
Cross 500m.
Detailed description of the invention
Fig. 1 is the schematic diagram of radio and television cluster monitoring play system；
Fig. 2 is the structure chart of radio and television cluster monitoring play system；
Fig. 3 is the multi-thread mechanism schematic diagram based on broadcasting and TV multicast shared port；
Fig. 4 is the circulation process figure of fore device connection request intercepting thread.
Fig. 5 is the circulation process figure of transmission monitoring thread.
The routing table that Fig. 6 is made of multiple addresses.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Herein, front end refers to the headend equipment of acquisition media data, and client refers to through multimedia gateway server access
The client of acquisition of media front end, stream medium data refer to the audio-video frequency media data flow of front-end collection.
Fig. 1 shows the schematic diagram of radio and television cluster play system.It will be seen from figure 1 that network A and network B pass through
Multimedia gateway 3 connects, and network A includes multiple client 1, and network B includes front end.Before the client 1 and network B of network A
Data are transmitted at end 2 by multimedia gateway 3, that is, audio/video flow data are transmitted to multimedia gateway 3 in the front end 2 of network B,
Multimedia gateway 3 is by the audio/video flow data forwarding received to the client 1 of network A.
Fig. 2 shows the structure charts of radio and television cluster play system.As can be seen that multimedia gateway 3, which has, is based on TCP
The open interface that agreement is formulated, i.e. TCP interface transmit audio/video flow data using TCP transmission agreement.Multimedia gateway will regard sound
Frequency stream is forwarded as binary data, can transparent transmission video-voice frequency flow data, the specific compressed format of video and audio is unrelated.As long as prison
The video and audio transmission of measurement equipment meets the interface, can forward video-voice frequency flow by multicast device.Multimedia gateway passes through more nets
Cause for gossip is existing from a physics TCP/IP network to the audio/video flow data forwarding of another physics TCP/IP network.
The specific workflow of multimedia gateway is as follows:
S1, client 1 connect multimedia gateway 3 by multimedia plug-in unit；
S2, client 1 send headend equipment connection request to multimedia gateway by the TCP interface 4 of multimedia gateway 3；
S3,3 receiving front-end equipment connection request of multimedia gateway simultaneously connect headend equipment 2；
Audio/video flow data are sent to multimedia gateway 3 by S4, headend equipment 2, and multimedia gateway 3 is by the audio, video data
Client is issued in circulation.
Due to support a large amount of concurrent client transmissions, the present invention to use broadcasting and TV multicast shared port mechanism, i.e., more matchmakers
Body gateway handles concurrent client request using the multi-threaded architecture based on broadcasting and TV multicast shared port.Fig. 3 is broadcasting and TV multicast
The schematic diagram of shared port mechanism, multimedia gateway 3 include broadcasting and TV multicast shared port 5 and broadcasting and TV multicast shared port active line
Cheng Chi 6 can carry out bidirectional data transfers, broadcasting and TV multicast shared port 5 and visitor between broadcasting and TV multicast shared port 5 and front end 2
It can also carry out bidirectional data transfers between family end 1, broadcasting and TV multicast shared port 5 is from broadcasting and TV multicast shared port worker thread pond
Worker thread is called in 6.Under normal conditions, broadcasting and TV multicast shared port worker thread pond includes three classes worker thread, the first kind
Headend equipment connection request intercepting thread, the second class are shared port worker threads, and third class is transmission of monitoring thread.
The workflow of broadcasting and TV multicast shared port is as follows: when client 1 initiates headend equipment connection to multimedia gateway 3
When request, the headend equipment connection request intercepting thread of multimedia gateway 3 will receive the connection request, and multimedia gateway 3 is from visitor
Family end 1 receives Streaming Media uniform resource locator (URL), according to Media Stream URL connection front end 2.Then shared port active line
Journey is responsible for being transmitted to client 1 from 2 receiving stream media data of front end.If front end or network are abnormal, equipment may cause
Connection is transmitted without data for a long time, and transmission of monitoring thread is responsible for whether the connection of regular check equipment has data transmission, such as one
It fixes time interior without data transmission, then terminates equipment connection.
Fig. 4 shows the circulation process figure of headend equipment connection request intercepting thread.Its workflow is as follows:
SOCKET (socket) is listened in S201 foundation；
S202 enters detection；
S203 judges whether client exits request, if so, being directly transferred to S208, exits thread；Conversely, into
S204；
S204 detection headend equipment connection request；
S205 judges whether client issues headend equipment connection request, if so, into S206；Conversely, then directly returning
S202 detection is returned, continues to test whether client exits request；
S206 receives connection；
S207 establishes client service, is transferred to S202 detection, continues to test whether client exits request；
S208 is exited.
Fig. 5 shows the circulation process figure of transmission of monitoring thread.Its workflow is as follows:
S401 broadcasting and TV multicast shared port sending and receiving data；
Request is exited in S402 detection；
S403 judges whether client exits request, if it is, being transferred to S408 directly exits thread, conversely,
It is transferred to S404；
S404 detects last time sending and receiving data；
S405 judges whether last time data are completed, if it is not, then being transferred to S407；If so, being transferred to S406；
S406 judges whether there is new data, if it is not, then S402 is returned to, if it is, being transferred to S407；
S407 forwards data, is transferred to S402；
S408 is exited.
In addition, multimedia gateway needs to distribute media data when multiple client accesses media data all the way simultaneously
It cannot influence each other to multiple client, and between each client, that is, realize that media data of going the same way is shared.The distribution mechanisms
By the way of two-stage buffering.One is established for each headend equipment first and receives buffer area, establishes one for each client
Send buffer area.Buffer area is by the way of single-track link table by multiple media frame data concatenatings.The buffer area of headend equipment is solid
Determine the circular buffering of size, the media data of headend equipment is constantly filled into buffer area, when buffer area is full, newest media frame
Data cover oldest media frame data automatically.When the buffer area of client is empty, by media frame newest in the buffer area of front end
Datarams copy client buffer to.After client connection is sent, then newest matchmaker is copied from headend equipment buffer area
Body frame data.When the disconnecting of client, multimedia gateway checks the Media Stream URL of the client request, if also
Other clients are using, and such as without other clients, then multimedia gateway terminates relevant headend equipment or junior's multicast device
Connection.When the disconnecting of headend equipment or junior's multicast device, multimedia gateway terminates all relevant clients and connects
It connects.
Multimedia gateway receive the routing table being made of multiple addresses, it can be achieved that multi-level forwarding function.Routing table word
The form of string is accorded with to indicate, such as: 192.168.5.6:9900/192.168.6.3:9900/192.168.7.5:9900/
192.168.8.9:5050/0.Fig. 6 shows routing table, it can be seen that 192.168.5.6,192.168.6.3,
It 192.168.7.5 is the IP address of Media Gateway, 192.168.8.9 is front end address.192.168.5.6 host is connected to
It is requested after request to 192.168.6.3,192.168.6.3 host is connected to request and requests to 192.168.7.5,192.168.7.5
Host is connected to request and requests to 192.168.8.9, and media data is then successively to pass since 192.168.8.9 by opposite direction
It passs.In multi-level forwarding, when encountering the corresponding multimedia gateway failure in certain address in routing table, system trial is set across failure
It is standby, it is directly connected to multimedia gateway or the front end of next stage.
In addition, there is network failure or front end failure, and this after connection is established in multimedia gateway and client or front end
A little failures are possible in the case where not being detected, and multimedia gateway is interrupted and client and front end by no data time-out
Connection, and recycle the resource of distribution.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (21)
1. a kind of radio and television cluster playback method, including
Step 1, client connects multimedia gateway；
Step 2, client sends headend equipment connection request to multimedia gateway；
Step 3, multimedia gateway receiving front-end equipment connection request and headend equipment is connected；
Step 4, stream medium data is sent to multimedia gateway by headend equipment, which is transmitted to by multimedia gateway
Client.
2. radio and television cluster playback method as described in claim 1, wherein multimedia gateway uses total based on broadcasting and TV multicast
Enjoy the multi-threaded architecture of port.
3. radio and television cluster playback method as claimed in claim 2, wherein in step 3
The broadcasting and TV multicast shared port of multimedia gateway calls headend equipment connection request intercepting thread, receives the headend equipment
Connection request establishes the connection with the headend equipment.
4. radio and television cluster playback method as claimed in claim 3, wherein headend equipment connection request intercepting thread includes
Following steps:
Step 31, the module of listening to of multimedia gateway has detected whether headend equipment connection request；
Step 32, if so, multimedia gateway receives request and connects headend equipment, if it is not, return step 31.
5. radio and television cluster playback method as claimed in claim 2, wherein in step 4:
The broadcasting and TV multicast shared port of multimedia gateway calls shared port worker thread, from headend equipment receiving stream media number
According to being transmitted to client.
6. radio and television cluster playback method as claimed in claim 2, wherein in step 4
Broadcasting and TV multicast shared port calling transmission of monitoring thread, the connection of regular check multimedia gateway and headend equipment, and
Whether the connection of multimedia gateway and headend equipment has data transmission.
7. radio and television cluster playback method as claimed in claim 6, wherein transmission of monitoring thread the following steps are included:
Step 41, the transmission of monitoring module detection last time of multimedia gateway receives or sends whether data are completed；
Step 42, if not completing, continue to or send data；Step 43 is gone to if being completed；
Step 43, transmission of monitoring module has detected whether new data；
Step 44, if so, forwarding new data, if nothing, return step 41.
8. wherein client passes through multimedia plug-in unit such as above-mentioned radio and television cluster playback method described in claim 1
Connect multimedia gateway.
9. wherein multimedia gateway, which uses, is based on Transmission Control Protocol such as above-mentioned radio and television cluster playback method described in claim 1
The open interface of formulation sends and receivees stream medium data.
10. wherein multimedia gateway is received according to from client such as above-mentioned radio and television cluster playback method described in claim 1
Media stream uniform resource locator (URL) the connection headend equipment arrived.
11. radio and television cluster playback method as described in claim 1, wherein
Stream medium data is distributed to multiple client using the ways of distribution of two-stage buffering by the multimedia gateway.
12. radio and television cluster playback method as claimed in claim 11, wherein
The multimedia gateway is that each headend equipment establishes a reception buffer area, establishes one for each client and sends and delays
Area is rushed, buffer area is received and sends buffer area by the way of single-track link table for multiple media frame data concatenatings.
13. radio and television cluster playback method as claimed in claim 12, wherein
The buffer area of headend equipment is the circular buffering of fixed size, and the media data of headend equipment is constantly filled into buffer area,
When the buffer area of headend equipment is full, newest media frame data cover oldest media frame data automatically.
14. radio and television cluster playback method as claimed in claim 12, wherein
When the buffer area of client is empty, media frame datarams newest in equipment end buffer area are copied to client buffer
Area after client connection is sent, then copies newest media frame data from headend equipment buffer area.
15. radio and television cluster playback method as described in claim 1, wherein
The multimedia gateway receives the routing table being made of multiple addresses, realizes multi-level forwarding.
16. radio and television cluster playback method as claimed in claim 15, wherein
The form of routing table character string indicates.
17. radio and television cluster playback method as described in claim 1, wherein
The multimedia gateway interrupts the connection with client or headend equipment by no data time-out.
18. radio and television cluster playback method as described in claim 1, wherein
The stream medium data includes real-time video-voice frequency flow media.
19. a kind of multimedia gateway device for realizing radio and television cluster playback method described in any of the above-described claim, special
Sign is, including listens to module, data transmitting module and transmission of monitoring module；
Module is listened to for detecting whether there is headend equipment connection request, from client receiving front-end equipment connection request；
Data transmitting module is used for from headend equipment receiving stream media data, and stream medium data is sent to client；
Transmission of monitoring module receives or sends whether data are completed for monitoring.
20. multimedia gateway device as claimed in claim 19 is further included the open interface formulated based on Transmission Control Protocol, is used for
Send and receive stream medium data.
21. multimedia gateway device as claimed in claim 19 further includes that broadcasting and TV multicast shared port and broadcasting and TV multicast are shared
Port thread pool, broadcasting and TV multicast shared port call the thread in broadcasting and TV multicast shared port thread pool, the shared end of broadcasting and TV multicast
Mouth thread pool includes headend equipment connection request intercepting thread, shared port worker thread and transmission of monitoring thread.
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