CN104427400A - Streaming media transmission method and system, and streaming media server - Google Patents
Streaming media transmission method and system, and streaming media server Download PDFInfo
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- CN104427400A CN104427400A CN201310368160.7A CN201310368160A CN104427400A CN 104427400 A CN104427400 A CN 104427400A CN 201310368160 A CN201310368160 A CN 201310368160A CN 104427400 A CN104427400 A CN 104427400A
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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]
- H04N21/60—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
- H04N21/643—Communication protocols
-
- 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
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
-
- 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
- H04N21/64761—Control signals issued by the network directed to the server or the client directed to the server
- H04N21/64769—Control signals issued by the network directed to the server or the client directed to the server for rate control
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a streaming media transmission method and system, and a streaming media server. The method comprises the following steps: a client sending a program demand request to the streaming media server by use of an RTSP; the streaming media server, according to the program demand request, establishing a TCP connection with the client, and based on the TCP connection, sending a video stream requested by the program demand request by use of an RTP; the client receiving the video stream, playing the video stream, and according to the occupation condition of a cache memory for the client to receive the video stream, sending a corresponding flow control signaling to the stream media server by use of a RTSP; and the streaming media server, according to the flow control signaling, pausing or continuously sending the requested video stream on the basis of the TCP connection by use of the RTP. According to the technical scheme provided by the invention, the streaming media transmission reliability and network adaptation capability of the RTP/RTSP are improved.
Description
Technical field
The present invention relates to streaming media field, particularly a kind of flow-medium transmission method, system and streaming media server.
Background technology
Stream media technology refer to multi-medium data with streaming manner by network from service end to client transmission, meanwhile, client can accept the technology that multimedia data stream carries out playing.RTP (Real-time Transport Protocol, RTP)/real-time streaming protocol (Real Time Streaming Protocol, RTSP) and HTTP are two kinds of fluidization techniques of current extensive use.
Because RTP/RTSP fluidization technique well can support live broadcast service, and the operation such as F.F., rewind, at present, interactive individual character TV (the Interactive PersonalityTelevision of part, IPTV) and most of video frequency program adopt RTP/RTSP fluidization technique, RTP/RTSP fluidization technique is normally based on RTP/ User Datagram Protoco (UDP) (User DataProtocol, UDP) transmission, and server pushes code stream by code rate.But, the adaptive capacity of RTP/RTSP fluidization technique to network is poor, the packet loss of network, shake easily cause the loss of video message, and then cause the phenomenon occurring mosaic and pause during user's watching video, but, if the fluidization technique current IPTV and video frequency program adopted carries out changing to replace RTP/RTSP on a large scale, not only need a large amount of retrofit work to existing network, and the original advantage of RTP/RTSP can be lost.
Summary of the invention
According to an aspect of the embodiment of the present invention, a technical problem to be solved is: provide a kind of flow-medium transmission method, system and streaming media server, improves reliability and the network-adaptive ability of RTP/RTSP streaming media.
A kind of flow-medium transmission method that the embodiment of the present invention provides, comprising:
Client utilizes RTSP agreement to send order request to streaming media server;
Described streaming media server, according to described order request, is set up TCP with described client and is connected, and connects the video flowing utilizing Real-time Transport Protocol to send described order request to ask based on TCP;
Described client receives described video flowing to play, and takies situation according to the buffer memory of described client receiver, video stream, utilizes RTSP agreement to send corresponding flow control signaling to described streaming media server;
Described streaming media server, according to described flow control signaling, suspends or continues to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
Alternatively, wherein, the buffer memory according to described client receiver, video stream takies situation, utilizes RTSP agreement to send corresponding flow control signaling to described streaming media server, specifically comprises:
When described buffer memory occupancy meets predetermined upper bound condition, described client utilizes RTSP agreement to send the flow control signaling suspended and send to described streaming media server; Described streaming media server suspends according to described the flow control signaling sent, and suspends the video flowing sending and ask;
Under video flowing suspends transmission situation, data cachedly to gradually reduce along with video playback, when described buffer memory occupancy meets predetermined lower limit condition, described client utilizes RTSP agreement to send the flow control signaling continuing to send to described streaming media server; Described streaming media server, according to the described flow control signaling continuing to send, continues to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
Alternatively, described method also comprises:
Described client utilizes RTSP agreement to send the flow control signaling of F.F. or rewind to described streaming media server, and empties the video flowing of described buffer memory current cache;
Described streaming media server connects the video flowing utilizing Real-time Transport Protocol to send institute's F.F. or rewind based on TCP.
Alternatively, wherein, described streaming media server sends video flowing to client, specifically comprises:
Described streaming media server, according to the network bandwidth between described streaming media server and described client, sends video flowing by network maximum rate.
A kind of streaming media server that the embodiment of the present invention provides, comprising:
Receiving element, for receiving the order request that client utilizes RTSP agreement to send to streaming media server;
Network protocol unit, for according to described order request, sets up TCP with described client and is connected;
Streaming Media transmitting element, the video flowing of asking for utilizing Real-time Transport Protocol to send described order request based on TCP connection, plays to be received described video flowing by client; According to flow control signaling, suspend or continue to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking;
Flow controlling unit, takies the corresponding flow control signaling of situation for what receive according to buffer memory, client takies that situation utilizes RTSP agreement to send with described.
Alternatively, wherein, described Streaming Media transmitting element, specifically for being suspend the flow control signaling sent when described flow control signaling, suspends the video flowing sending and ask; When described flow control signaling is the flow control signaling continuing to send, continue to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
Alternatively, wherein, described Streaming Media transmitting element, also for when the flow control signaling that receive F.F. that described client utilizes RTSP agreement to send or rewind, connects the video flowing utilizing Real-time Transport Protocol transmission institute's F.F. or rewind based on TCP.
Alternatively, wherein, described Streaming Media transmitting element, specifically for according to the network bandwidth between described streaming media server and described client, sends video flowing by network maximum rate.
The embodiment of the present invention additionally provides a kind of stream media transmission system, comprising:
Any one streaming media server in above-mentioned streaming media server embodiment;
Client, sends order request for utilizing RTSP agreement to streaming media server; Receive described video flowing to play, and take situation according to the buffer memory of described client receiver, video stream, utilize RTSP agreement to send corresponding flow control signaling to described streaming media server.
Alternatively, wherein, described client, specifically for meeting predetermined upper bound condition when described buffer memory occupancy, utilizes RTSP agreement to send the flow control signaling suspended and send to described streaming media server; Under video flowing suspends transmission situation, data cachedly to gradually reduce along with video playback, when described buffer memory occupancy meets predetermined lower limit condition, utilize RTSP agreement to send the flow control signaling continuing to send to described streaming media server.
Alternatively, wherein, described client profit, also for sending the flow control signaling of F.F. or rewind to described streaming media server by RTSP agreement, and empty the video flowing of described buffer memory current cache, receive described streaming media server connects institute's F.F. or the rewind utilizing Real-time Transport Protocol to send video flowing based on TCP.
Based on flow-medium transmission method, system and streaming media server that the above embodiment of the present invention provides, streaming media server is in response to the order request receiving client, set up TCP with client to be connected, and the video flowing utilizing Real-time Transport Protocol to send described order request to ask is connected based on TCP, thus RTP video flowing is carried by original UDP, change TCP carrying into, provide more reliable transmission performance, improve RTP/RTSP stream media network adaptive capacity.Client takies situation according to the buffer memory of receiver, video stream, corresponding flow control signaling is sent to streaming media server, expansion RTSP agreement adds flow control function, when less to existing network transformation, improves video quality and the Consumer's Experience of user's receiving stream media.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.Represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
What form a part for specification drawings describes embodiments of the invention, and together with the description for explaining principle of the present invention.
With reference to accompanying drawing, according to detailed description below, clearly the present invention can be understood, wherein:
Fig. 1 illustrates the schematic flow sheet of a kind of embodiment of flow-medium transmission method provided by the present invention;
Fig. 2 illustrates the schematic flow sheet of a kind of embodiment of flow-medium transmission method provided by the present invention;
Fig. 3 A-3B illustrates that in prior art and the application, streaming media server sends the transmission rate schematic diagram of video flowing respectively;
Fig. 4 illustrates the structural representation of a kind of embodiment of streaming media server provided by the present invention;
Fig. 5 illustrates the structural representation of a kind of embodiment of stream media transmission system provided by the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.It should be noted that: unless specifically stated otherwise, otherwise the parts of setting forth in these embodiments and the positioned opposite of step do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
Shown in Figure 1, Fig. 1 illustrates the schematic flow sheet of a kind of embodiment of flow-medium transmission method provided by the present invention.A kind of flow-medium transmission method that this embodiment provides comprises:
101, client utilizes RTSP agreement to send order request to streaming media server;
102, streaming media server, according to order request, is set up transmission control protocol (Transmission Control Protocol, TCP) with client and is connected, and connects the video flowing utilizing Real-time Transport Protocol transmission order request to ask based on TCP;
103, client receiver, video stream to play, and takies situation according to the buffer memory of client receiver, video stream, utilizes RTSP agreement to send corresponding flow control signaling to streaming media server;
104, streaming media server, according to flow control signaling, suspends or continues to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
In the method that the above embodiment of the present invention provides, streaming media server is in response to the order request receiving client, set up TCP with client to be connected, and the video flowing utilizing Real-time Transport Protocol to send described order request to ask is connected based on TCP, thus RTP video flowing is carried by original UDP, change TCP carrying into, provide more reliable transmission performance, improve RTP/RTSP stream media network adaptive capacity.In the operation of 103, client takies situation according to the buffer memory of receiver, video stream, sends corresponding flow control signaling, add flow control function, thus extend RTSP agreement to streaming media server.By such scheme, when less to existing network transformation, improve video quality and the Consumer's Experience of user's receiving stream media.
In addition, by adopting Transmission Control Protocol, when fragmentary packet loss appears in network, by TCP retransmission mechanism, making RTP/RTSP fluidization technique also be provided with functions of retransmission, realizing better transmission error control, further providing the reliability of transfer of data.
Shown in Figure 2, Fig. 2 illustrates the schematic flow sheet of a kind of embodiment of flow-medium transmission method provided by the present invention.Unrestricted according to a concrete example of the inventive method embodiment, in the operation of operation 103 and 104 embodiment illustrated in fig. 1, wherein, buffer memory according to client receiver, video stream takies situation, utilize RTSP agreement to send corresponding flow control signaling to streaming media server, specifically can comprise:
201, when buffer memory occupancy meets predetermined upper bound condition, client utilizes RTSP agreement to send the flow control signaling suspended and send to streaming media server; Such as, after starting broadcasting, client-cache stores occupancy may progressively be increased, close to the upper bound condition of buffer memory;
202, streaming media server, according to suspending the flow control signaling sent, suspends the video flowing sending and ask;
203, under video flowing suspends transmission situation, data cachedly to gradually reduce along with video playback, when buffer memory occupancy meets predetermined lower limit condition, client utilizes RTSP agreement to send the flow control signaling continuing to send to streaming media server; Such as, when client-cache memory footprint gradually reduces, when the lower limit condition predetermined close to buffer memory, continue the video of play-on-demand;
204, streaming media server, according to the flow control signaling continuing to send, continues to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
By above-described embodiment, the signaling protocol that can adopt is all RTSP agreement mutually, realizes client-cache and controls, guarantee the inexhausted not overflow of client-cache resource, to realize better flow control.
Unrestricted according to a concrete example of the inventive method embodiment, continue shown in Figure 2, the method can also comprise:
205, client utilizes RTSP agreement to send the flow control signaling of F.F. or rewind to streaming media server, and empties the video flowing of buffer memory current cache;
206, streaming media server connects the video flowing utilizing Real-time Transport Protocol to send institute's F.F. or rewind based on TCP.
While RTSP agreement is expanded, also keep the mutual signalings such as RTSP program request F.F..Because fast forwarding and fast rewinding video is the video of sampling on original video stream basis, the speed namely play under same code check is faster, by emptying the video flowing of buffer memory current cache, thus responds the video flowing of fast forwarding and fast rewinding fast.Use identical RTSP signaling to control, and the video flowing of fast forwarding and fast rewinding still can adopt TCP to carry.
In various embodiments of the present invention, streaming media server sends video flowing to client, specifically can comprise: streaming media server is according to the network bandwidth between streaming media server and client, video flowing is sent by network maximum rate, thus based on TCP sliding window, the transmission quantity that can realize better flow control and more optimize.In addition, the network connection speed corresponding with the network bandwidth also can be adopted to send video flowing.
Shown in Fig. 3 A-3B, illustrate that in prior art and the application, streaming media server sends the schematic diagram of video stream speed respectively.As Fig. 3 A in the prior art, video flowing pushes according to code rate, when the network bandwidth changes, the delay variation of network, rate variation, such as, lower than code rate, will there is packet loss in bandwidth, Consumer's Experience is declined, as in Fig. 3 A, the constant code rate of RTP/RTSP can cause a large amount of packet loss.Compare, as shown in Figure 3 B, because Transmission Control Protocol has flow control, streaming media server is according to the network bandwidth between streaming media server and client simultaneously, the speed corresponding with the network bandwidth is adopted to send video flowing, thus the speed of server push video flowing is determined according to network maximum rate, and be subject to the flow control of Transmission Control Protocol simultaneously, thus avoid the generation of packet loss phenomenon.
In addition, push in conjunction with flow control by network maximum rate, RTP/RTSP can better be supported, and dynamic bit rate (Variable Bit Rate, VBR) is encoded.
Shown in Figure 4, Fig. 4 illustrates the structural representation of a kind of streaming media server that the embodiment of the present invention provides.This streaming media server comprises:
Receiving element 401, for receiving the order request that client utilizes RTSP agreement to send to streaming media server;
Network protocol unit 402, for according to order request, sets up TCP with client and is connected; Network protocol unit 402 comprises ICP/IP protocol stack.
Streaming Media transmitting element 403, for connecting the video flowing utilizing Real-time Transport Protocol transmission order request to ask based on TCP, to be play by client receiver, video stream; According to flow control signaling, suspend or continue to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking;
Flow controlling unit 404, takies according to buffer memory the flow control signaling corresponding with the situation that takies that situation utilizes RTSP agreement to send for receiving client.
Unrestricted according to a concrete example of streaming media server embodiment of the present invention, wherein, Streaming Media transmitting element 403, specifically for being suspend the flow control signaling sent when flow control signaling, suspends the video flowing sending and ask; When flow control signaling is the flow control signaling continuing to send, continue to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
Unrestricted according to a concrete example of streaming media server embodiment of the present invention, wherein, Streaming Media transmitting element 403, also for when the flow control signaling that receive F.F. that client utilizes RTSP agreement to send or rewind, connect the video flowing utilizing Real-time Transport Protocol transmission institute's F.F. or rewind based on TCP.
In above-mentioned each streaming media server embodiment, wherein, Streaming Media transmitting element 403, specifically for according to the network bandwidth between streaming media server and client, sends video flowing by network maximum rate.
Shown in Figure 5, Fig. 5 illustrates the structural representation of a kind of stream media transmission system that the embodiment of the present invention provides.Stream media transmission system in this embodiment, comprising:
Streaming media server 501 in any one streaming media server embodiment above-mentioned;
Client 502, sends order request for utilizing RTSP agreement to streaming media server; Receiver, video stream to play, and takies situation according to the buffer memory of client receiver, video stream, utilizes RTSP agreement to send corresponding flow control signaling to streaming media server.
Streaming media server 501 in Fig. 5 embodiment stream media transmission system can also have the systemic-function of other streaming media service known to those skilled in the art, as shown in the original system module in Fig. 5, such as, obtains files in stream media.
A concrete example of system according to the invention embodiment and unrestricted, client 502, specifically for meeting predetermined upper bound condition when buffer memory occupancy, utilizes RTSP agreement to send the flow control signaling suspended and send to streaming media server; Under video flowing suspends transmission situation, data cachedly to gradually reduce along with video playback, when buffer memory occupancy meets predetermined lower limit condition, utilize RTSP agreement to send the flow control signaling continuing to send to streaming media server.
A concrete example of system according to the invention embodiment and unrestricted, client 502 is also for sending the flow control signaling of F.F. or rewind to streaming media server by RTSP agreement, and emptying the video flowing of buffer memory current cache, receiving stream media server connects the video flowing of institute's F.F. or the rewind utilizing Real-time Transport Protocol to send based on TCP.
So far, described in detail according to a kind of flow-medium transmission method of the present invention, system and streaming media server.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, same or analogous part cross-reference between each embodiment.For stream media transmission system, streaming media server embodiment, because itself and embodiment of the method are substantially corresponding, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Flow-medium transmission method of the present invention, system and streaming media server may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes flow-medium transmission method of the present invention, system and streaming media server.Said sequence for the step of described method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (11)
1. a flow-medium transmission method, comprising:
Client utilizes real-time streaming protocol RTSP agreement to send order request to streaming media server;
Described streaming media server, according to described order request, is set up TCP with described client and is connected, and connects the video flowing utilizing realtime transmission protocol RTP agreement to send described order request to ask based on TCP;
Described client receives described video flowing to play, and takies situation according to the buffer memory of described client receiver, video stream, utilizes RTSP agreement to send corresponding flow control signaling to described streaming media server;
Described streaming media server, according to described flow control signaling, suspends or continues to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
2. method according to claim 1, wherein, the buffer memory according to described client receiver, video stream takies situation, utilizes RTSP agreement to send corresponding flow control signaling to described streaming media server, specifically comprises:
When described buffer memory occupancy meets predetermined upper bound condition, described client utilizes RTSP agreement to send the flow control signaling suspended and send to described streaming media server; Described streaming media server suspends according to described the flow control signaling sent, and suspends the video flowing sending and ask;
Under video flowing suspends transmission situation, data cachedly to gradually reduce along with video playback, when described buffer memory occupancy meets predetermined lower limit condition, described client utilizes RTSP agreement to send the flow control signaling continuing to send to described streaming media server; Described streaming media server, according to the described flow control signaling continuing to send, continues to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
3. method according to claim 1, described method also comprises:
Described client utilizes RTSP agreement to send the flow control signaling of F.F. or rewind to described streaming media server, and empties the video flowing of described buffer memory current cache;
Described streaming media server connects the video flowing utilizing Real-time Transport Protocol to send institute's F.F. or rewind based on TCP.
4. the method according to claims 1 to 3 any one, wherein, described streaming media server sends video flowing to client, specifically comprises:
Described streaming media server, according to the network bandwidth between described streaming media server and described client, sends video flowing by network maximum rate.
5. a streaming media server, comprising:
Receiving element, for receiving the order request that client utilizes RTSP agreement to send to streaming media server;
Network protocol unit, for according to described order request, sets up TCP with described client and is connected;
Streaming Media transmitting element, the video flowing of asking for utilizing Real-time Transport Protocol to send described order request based on TCP connection, plays to be received described video flowing by client; According to flow control signaling, suspend or continue to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking;
Flow controlling unit, takies the corresponding flow control signaling of situation for what receive according to buffer memory, client takies that situation utilizes RTSP agreement to send with described.
6. streaming media server according to claim 5, wherein, described Streaming Media transmitting element, specifically for being suspend the flow control signaling sent when described flow control signaling, suspends the video flowing sending and ask; When described flow control signaling is the flow control signaling continuing to send, continue to connect based on TCP to utilize Real-time Transport Protocol to send the video flowing of asking.
7. streaming media server according to claim 5, wherein, described Streaming Media transmitting element, also for when the flow control signaling that receive F.F. that described client utilizes RTSP agreement to send or rewind, connects the video flowing utilizing Real-time Transport Protocol transmission institute's F.F. or rewind based on TCP.
8. the streaming media server according to claim 5 to 7 any one, wherein, described Streaming Media transmitting element, specifically for according to the network bandwidth between described streaming media server and described client, sends video flowing by network maximum rate.
9. a stream media transmission system, comprising:
Streaming media server according to claim 5 to 8 any one;
Client, sends order request for utilizing RTSP agreement to streaming media server; Receive described video flowing to play, and take situation according to the buffer memory of described client receiver, video stream, utilize RTSP agreement to send corresponding flow control signaling to described streaming media server.
10. system according to claim 9, wherein, described client, specifically for meeting predetermined upper bound condition when described buffer memory occupancy, utilizes RTSP agreement to send the flow control signaling suspended and send to described streaming media server; Under video flowing suspends transmission situation, data cachedly to gradually reduce along with video playback, when described buffer memory occupancy meets predetermined lower limit condition, utilize RTSP agreement to send the flow control signaling continuing to send to described streaming media server.
11. systems according to claim 9, described client profit, also for sending the flow control signaling of F.F. or rewind to described streaming media server by RTSP agreement, and empty the video flowing of described buffer memory current cache, receive described streaming media server connects institute's F.F. or the rewind utilizing Real-time Transport Protocol to send video flowing based on TCP.
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