CN105933241A - Network congestion adaption device and method in multimedia streaming transmission system - Google Patents
Network congestion adaption device and method in multimedia streaming transmission system Download PDFInfo
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- CN105933241A CN105933241A CN201610244553.0A CN201610244553A CN105933241A CN 105933241 A CN105933241 A CN 105933241A CN 201610244553 A CN201610244553 A CN 201610244553A CN 105933241 A CN105933241 A CN 105933241A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/25—Flow control; Congestion control with rate being modified by the source upon detecting a change of network conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
Abstract
The present invention discloses a network congestion adaption device in a multimedia streaming transmission system. The device comprises a management service module, a multimedia source module, a multimedia publishing module, a transmission module, a client module, and a network congestion state monitoring module. The present invention also discloses a network congestion adaption method in a multimedia streaming transmission system. Through the mutual cooperation of the management service module, the multimedia source module, the multimedia publishing module, the transmission module, the client module, and the network congestion state monitoring module, the influence on the multimedia data stream transmission by network congestion is avoided, the requirement of a streaming media server can be reduced, and the pressure of the streaming media server can be reduced.
Description
Technical field
The present invention relates to the real-time Transmission field in computer network-based video transmission technique field, be specifically related to network congestion self-reacting device in a kind of transmission of multimedia streams system, further relate to network congestion adaptive approach in a kind of transmission of multimedia streams system.For improving the fluency of the transmission of video under heterogeneous networks network congestion environment.
Background technology
Along with the Internet, the development of information technology, digitized and the interactive degree of media services improve day by day.The increasingly mature of technology allows users to access easily content, and therefore everybody starts to be desirable to by wired video medium type enriched with other experiencing superior quality with mobile device whenever and wherever possible.Additionally, Content owner is also seeking significantly more efficient new way, in order to broadly propagate its content and therefrom make a profit in mode as much as possible.
But Internet resources be dynamically change, uncertain, current network typically can only provide the service of do one's best (best-effort), it is impossible to provides the guarantee can having secure access under any environment and scene.When carrying out transmission of flow media data, in the transmission of user's streaming media, requirement of real-time is much larger than reliability, the packet loss of random burst and excessive time delay, inevitably brings congested, the collapse of the most whole network.Therefore system is in the case of making full use of the network bandwidth, it is ensured that the optimal service quality of streaming media, is necessary for using adaptive congestion control technology, uses the mode of network bandwidth adaptive to ensure the real-time Transmission of stream medium data.
Summary of the invention
It is an object of the invention to the problems referred to above existed for prior art, network congestion self-reacting device in a kind of transmission of multimedia streams system is provided, additionally provide network congestion adaptive approach in a kind of transmission of multimedia streams system, network congestion can be well adapted to, the requirement of convection media server can be reduced again, alleviate the pressure of streaming media server, there is good using value.
The above-mentioned purpose of the present invention is achieved through the following technical solutions:
Network congestion self-reacting device in a kind of transmission of multimedia streams system, including:
Management services module, asks for receiving the multimedia data stream from client modules, searches requested multimedia data stream in the most chartered multimedia data stream；The initial code check notice multimedia release module that code check corresponding to the resolution of the code stream of requested multimedia data stream, each code stream and client modules are required；
Multimedia sources module, for preparing each multimedia data stream to be released, each multimedia data stream includes same content, equal resolution, the code stream of different code check, and the multimedia data stream that each is to be released is registered to management services module；
Multimedia release module, for setting up issue passage respectively for the code stream of each code check of requested multimedia data stream, for when issuing requested multimedia data stream first, according to the code check initiateing the code check code stream corresponding with each issue passage, select to issue code check and the initial code check immediate issue passage of corresponding code stream in passage, as the current issue passage selected
It is additionally operable to, by the current passage of issuing selected, the corresponding code stream in multimedia sources module is published to transport module；
It is additionally operable to receive the network state that network congestion condition monitoring modular sends,
Being additionally operable to the initial bit rate according to client modules selection, the current code check selecting to issue passage correspondence code stream, and the network state that network congestion condition monitoring modular is noticed, selection reduces, improves or maintains the code check of multimedia data stream to be released；
Transport module, is used for bit stream to client modules；
Client modules, for the requirement according to user, sends multimedia data stream request to management services module, and request transmits certain the most issued multimedia data stream, and initial bit rate,
Being additionally operable to receive code stream, playback/echo is to user；And add up the packet receiving statistical information receiving code stream, packet receiving statistical information includes average transmission time delay, packet loss；Packet receiving statistical information is fed back to the network congestion condition monitoring modular of server end；
Network congestion condition monitoring modular, for receiving the packet receiving statistical information from client modules, it is judged that network state is steady statue or unsteady state, and network state is advertised to media releasing module.
Network congestion condition monitoring modular as above judges network state in the following manner:
If average transmission time delay is less than or equal to the delay threshold preset, and packet loss is less than or equal to the packet loss threshold value preset, then judge that network state is steady statue；Otherwise, it is judged that network state is unsteady state.
Multimedia release module as above reduces according to selection, improves or maintains the code check of multimedia data stream to be released according in the following manner:
If network state is steady statue, and the code check issuing passage correspondence code stream currently selected is less than the initial bit rate of user's request, then select the code check code check higher than the code stream issued in passage of currently selection of code stream, and the issue passage minimum less than or equal to code check in the issue passage of the initial bit rate of user's request is as the newly selected issue passage；
If network state is steady statue, and the current code check issuing passage correspondence code stream selected is equal with the initial bit rate that user asks or higher than initial bit rate, then keeps the current selection issuing passage；
If network state is unsteady state, and the current code check issuing passage correspondence code stream selected has been that in all issue passages, code check is minimum, then keep the current selection issuing passage；
If network state is unsteady state, and code check is minimum in the code check not all issue passage issuing passage correspondence code stream currently selected, the code check then selecting code stream is less than the code check of the code stream issued in passage currently selected, and the issue passage the highest greater than or equal to code check in the issue passage of lowest bit rate is as the newly selected issue passage.
Network congestion adaptive approach in a kind of transmission of multimedia streams system, comprises the following steps:
Step 1, multimedia sources module prepare each multimedia data stream to be released, each multimedia data stream includes same content, equal resolution, the code stream of different code check, and the multimedia data stream that each is to be released is registered to management services module by multimedia sources module；
Step 2, client modules, according to the requirement of user, send multimedia data stream request to management services module, and request transmits certain the most issued multimedia data stream, and initial bit rate；
The multimedia data stream that step 3, management services module receive from client modules is asked, and searches requested multimedia data stream in the most chartered multimedia data stream；The initial code check notice multimedia release module that code check corresponding to the resolution of the code stream of requested multimedia data stream, each code stream and client modules are required by management services module, multimedia release module is that the code stream of each code check of requested multimedia data stream sets up issue passage respectively；
The code check of the code stream that the initial code check of step 4, multimedia release module foundation is corresponding with each issue passage, selects to issue code check and the initial code check immediate issue passage of corresponding code stream in passage, as the current issue passage selected；
Corresponding code stream in multimedia sources module is published to transport module by step 5, the current passage of issuing selected；
Step 6, transport module by bit stream to client modules；
Step 7, client modules receive code stream, and playback/echo is to user；And add up the packet receiving statistical information receiving code stream, packet receiving statistical information includes the average transmission time delay of message, packet loss；Packet receiving statistical information is fed back to the network congestion condition monitoring modular of server end,
Step 8, network congestion condition monitoring modular receive the packet receiving statistical information from client modules, it is judged that network state is steady statue or unsteady state, and network state is advertised to multimedia release module；
The initial bit rate that step 9, multimedia release module select according to client modules, the current code check selecting to issue passage correspondence code stream, and the network state that network congestion condition monitoring modular is noticed, select to reduce, improve or maintain the code check of multimedia data stream to be released.
Network state as above judges in the following manner:
If average transmission time delay is less than or equal to the delay threshold preset, and packet loss is less than or equal to the packet loss threshold value preset, then judge that network state is steady statue；Otherwise, it is judged that network state is unsteady state.
Step 9 as above comprises the following steps:
If step 9.1 network state is steady statue, and the current issue passage selected is (if reaching this step for the first time, then the current issue passage selected herein selects in step 4；If being repeatedly to arrive this step, the current issue passage selected the most herein, upper once arrive step 10 time select) code check of corresponding code stream is less than the initial bit rate of user's request, then select the code check code check higher than the current code stream issued in passage selected of code stream, and the issue passage minimum less than or equal to code check in the issue passage of the initial bit rate of user's request is as the newly selected issue passage, returns step 5；
If step 9.2 network state is steady statue, and the current code check issuing passage correspondence code stream selected is equal with the initial bit rate that user asks or higher than initial bit rate, then keeps the current selection issuing passage；Return step 6；
If step 9.3 network state is unsteady state, and the current code check issuing passage correspondence code stream selected has been that in all issue passages, code check is minimum, then keep the current selection issuing passage；Return step 6；
If step 9.4 network state is unsteady state, and code check is minimum in the code check not all issue passage issuing passage correspondence code stream currently selected, then select the code check code check less than the current code stream issued in passage selected of code stream, and the issue passage the highest greater than or equal to code check in the issue passage of lowest bit rate is as the newly selected issue passage, returns step 5.
The present invention has the advantages that relative to prior art
1) conventional Multi Media Service device is when supporting the transmission of Streaming Media variable code rate, and the method generally used is that coded multimedia information becomes the code stream of expectation code check in real time.This just requires that multimedia server has stronger computing capability, to meet the requirement of real-time coding, transcoding.The method that the present invention proposes, then be the time exchanging coding, transcoding with memory space for, before multimedia is issued, is ready for the code stream of various target bit rate, in order to reduce the requirement to multimedia server computing capability.Relative to the computing capability of raising server, increasing the memory space of server, its cost is much smaller.
2), in the present invention, for the code stream of the different code checks that same media stream prepares, its resolution is on all four, this guarantees client playback when, the size of window is to maintain constant.Relative to traditional approach, after changing code check, the size of client playback window, as well as change, has good Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the hardware connection diagram of network congestion self-reacting device in a kind of transmission of multimedia streams system；
Fig. 2 is the schematic flow sheet of network congestion adaptive approach in a kind of transmission of multimedia streams system.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is further described:
Network congestion self-reacting device in a kind of transmission of multimedia streams system, including:
Management services module；
Multimedia sources module；
Network congestion condition monitoring modular；
Multimedia release module；
Transport module；
Client modules；
Management services module, asks for receiving the multimedia data stream from client modules, searches requested multimedia data stream in the most chartered multimedia data stream；The initial code check notice multimedia release module that code check corresponding to the resolution of the code stream of requested multimedia data stream, each code stream and client modules are required.
Multimedia sources module, for preparing each multimedia data stream to be released, each multimedia data stream includes same content, equal resolution, the code stream of different code check, and the multimedia data stream that each is to be released is registered to management services module；
For the multimedia data stream that Real-time Collection video is corresponding, it should be the source code of same photographic head, the equal resolution that obtains through different coding parameters, multiple code streams of different code check；
And for multimedia data stream corresponding to video request program, then should be same content, equal resolution, multiple code streams of different code check.
Multimedia release module, for setting up issue passage respectively for the code stream of each code check of requested multimedia data stream, for when issuing requested multimedia data stream first, according to the code check initiateing the code check code stream corresponding with each issue passage, select to issue code check and the initial code check immediate issue passage of corresponding code stream in passage, as the current issue passage selected；
It is additionally operable to, by the current passage of issuing selected, the corresponding code stream in multimedia sources module is published to transport module；
It is additionally operable to receive the network state that network congestion condition monitoring modular sends；
Being additionally operable to the initial bit rate according to client modules selection, the current code check selecting to issue passage correspondence code stream, and the network state that network congestion condition monitoring modular is noticed, selection reduces, improves or maintains the code check of multimedia data stream to be released；It selects rule as follows:
If network state is steady statue, and the code check issuing passage correspondence code stream currently selected is less than the initial bit rate of user's request, then select the code check code check higher than the code stream issued in passage of currently selection of code stream, and the issue passage minimum less than or equal to code check in the issue passage of the initial bit rate of user's request is as the newly selected issue passage；
If network state is steady statue, and the current code check issuing passage correspondence code stream selected is equal with the initial bit rate that user asks or higher than initial bit rate, then keeps the current selection issuing passage；
If network state is unsteady state, and the current code check issuing passage correspondence code stream selected has been that in all issue passages, code check is minimum, then keep the current selection issuing passage；
If network state is unsteady state, and code check is minimum in the code check not all issue passage issuing passage correspondence code stream currently selected, the code check then selecting code stream is less than the code check of the code stream issued in passage currently selected, and the issue passage the highest greater than or equal to code check in the issue passage of lowest bit rate is as the newly selected issue passage.
Transport module, is used for bit stream to client modules.
Client modules, for the requirement according to user, sends multimedia data stream request to management services module, and request transmits certain the most issued multimedia data stream, and initial bit rate；
Being additionally operable to receive code stream, playback/echo is to user；And add up the packet receiving statistical information receiving code stream, packet receiving statistical information includes average transmission time delay, packet loss；Packet receiving statistical information is fed back to the network congestion condition monitoring modular of server end.
Network congestion condition monitoring modular, for receiving the packet receiving statistical information from client modules, it is judged that network state is steady statue or unsteady state, and network state is advertised to media releasing module；
The judgment rule of network state is as follows:
If average transmission time delay is less than the delay threshold preset, and packet loss is less than the packet loss threshold value preset, then judge that network state is steady statue；Otherwise, it is judged that network state is unsteady state.
Network congestion adaptive approach in a kind of transmission of multimedia streams system, it is as follows that it is embodied as step:
Step 1, multimedia sources module prepare each multimedia data stream to be released, each multimedia data stream includes same content, equal resolution, the code stream of different code check, and the multimedia data stream that each is to be released is registered to management services module by multimedia sources module；
For the multimedia data stream that Real-time Collection video is corresponding, it should be the source code of same photographic head, the equal resolution that obtains through different coding parameters, multiple code streams of different code check；
And for multimedia data stream corresponding to video request program, then should be same content, equal resolution, multiple code streams of different code check；
Step 2, client modules, according to the requirement of user, send multimedia data stream request to management services module, and request transmits certain the most issued multimedia data stream, and initial bit rate；
The multimedia data stream that step 3, management services module receive from client modules is asked, and searches requested multimedia data stream in the most chartered multimedia data stream；The initial code check notice multimedia release module that code check corresponding to the resolution of the code stream of requested multimedia data stream, each code stream and client modules are required by management services module, multimedia release module is that the code stream of each code check of requested multimedia data stream sets up issue passage respectively；
The code check of the code stream that the initial code check of step 4, multimedia release module foundation is corresponding with each issue passage, selects to issue code check and the initial code check immediate issue passage of corresponding code stream in passage, as the current issue passage selected；
Corresponding code stream in multimedia sources module is published to transport module by step 5, the current passage of issuing selected；
Step 6, transport module by bit stream to client modules；
Step 7, client modules receive code stream, and playback/echo is to user；And add up the packet receiving statistical information receiving code stream, packet receiving statistical information includes the average transmission time delay of message, packet loss；Packet receiving statistical information is fed back to the network congestion condition monitoring modular of server end.
Step 8, network congestion condition monitoring modular receive the packet receiving statistical information from client modules, it is judged that network state is steady statue or unsteady state, and network state is advertised to multimedia release module；
The judgment rule of network state is as follows:
If step 8.1 average transmission time delay is less than or equal to the delay threshold preset, and packet loss is less than or equal to the packet loss threshold value preset, then judge that network state is steady statue；Otherwise, it is judged that network state is unsteady state；
The initial bit rate that step 9, multimedia release module select according to client modules, the current code check selecting to issue passage correspondence code stream, and the network state that network congestion condition monitoring modular is noticed, select to reduce, improve or maintain the code check of multimedia data stream to be released；
It selects rule as follows:
If step 9.1 network state is steady statue, and the current issue passage selected is (if reaching this step for the first time, then the current issue passage selected herein selects in step 4；If being repeatedly to arrive this step, the current issue passage selected the most herein, upper once arrive step 10 time select) code check of corresponding code stream is less than the initial bit rate of user's request, then select the code check code check higher than the current code stream issued in passage selected of code stream, and the issue passage minimum less than or equal to code check in the issue passage of the initial bit rate of user's request is as the newly selected issue passage, returns step 5；
If step 9.2 network state is steady statue, and the current code check issuing passage correspondence code stream selected is equal with the initial bit rate that user asks or higher than initial bit rate, then keeps the current selection issuing passage；Return step 6；
If step 9.3 network state is unsteady state, and the current code check issuing passage correspondence code stream selected has been that in all issue passages, code check is minimum, then keep the current selection issuing passage；Return step 6；
If step 9.4 network state is unsteady state, and code check is minimum in the code check not all issue passage issuing passage correspondence code stream currently selected, then select the code check code check less than the current code stream issued in passage selected of code stream, and the issue passage the highest greater than or equal to code check in the issue passage of lowest bit rate is as the newly selected issue passage, returns step 5.
Specific embodiment described herein is only to present invention spirit explanation for example.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount scope defined in appended claims.
Claims (6)
1. network congestion self-reacting device in a transmission of multimedia streams system, it is characterised in that including:
Management services module, asks for receiving the multimedia data stream from client modules, searches requested multimedia data stream in the most chartered multimedia data stream；The initial code check notice multimedia release module that code check corresponding to the resolution of the code stream of requested multimedia data stream, each code stream and client modules are required；
Multimedia sources module, for preparing each multimedia data stream to be released, each multimedia data stream includes same content, equal resolution, the code stream of different code check, and the multimedia data stream that each is to be released is registered to management services module；
Multimedia release module, for setting up issue passage respectively for the code stream of each code check of requested multimedia data stream, for when issuing requested multimedia data stream first, according to the code check initiateing the code check code stream corresponding with each issue passage, select to issue code check and the initial code check immediate issue passage of corresponding code stream in passage, as the current issue passage selected
It is additionally operable to, by the current passage of issuing selected, the corresponding code stream in multimedia sources module is published to transport module；
It is additionally operable to receive the network state that network congestion condition monitoring modular sends,
Being additionally operable to the initial bit rate according to client modules selection, the current code check selecting to issue passage correspondence code stream, and the network state that network congestion condition monitoring modular is noticed, selection reduces, improves or maintains the code check of multimedia data stream to be released；
Transport module, is used for bit stream to client modules；
Client modules, for the requirement according to user, sends multimedia data stream request to management services module, and request transmits certain the most issued multimedia data stream, and initial bit rate,
Being additionally operable to receive code stream, playback/echo is to user；And add up the packet receiving statistical information receiving code stream, packet receiving statistical information includes average transmission time delay, packet loss；Packet receiving statistical information is fed back to the network congestion condition monitoring modular of server end；
Network congestion condition monitoring modular, for receiving the packet receiving statistical information from client modules, it is judged that network state is steady statue or unsteady state, and network state is advertised to media releasing module.
Network congestion self-reacting device in a kind of transmission of multimedia streams system the most according to claim 1, it is characterised in that described network congestion condition monitoring modular judges network state in the following manner:
If average transmission time delay is less than or equal to the delay threshold preset, and packet loss is less than or equal to the packet loss threshold value preset, then judge that network state is steady statue；Otherwise, it is judged that network state is unsteady state.
Network congestion self-reacting device in a kind of transmission of multimedia streams system the most according to claim 1, it is characterized in that, described multimedia release module reduces according to selection, improves or maintains the code check of multimedia data stream to be released according in the following manner:
If network state is steady statue, and the code check issuing passage correspondence code stream currently selected is less than the initial bit rate of user's request, then select the code check code check higher than the code stream issued in passage of currently selection of code stream, and the issue passage minimum less than or equal to code check in the issue passage of the initial bit rate of user's request is as the newly selected issue passage；
If network state is steady statue, and the current code check issuing passage correspondence code stream selected is equal with the initial bit rate that user asks or higher than initial bit rate, then keeps the current selection issuing passage；
If network state is unsteady state, and the current code check issuing passage correspondence code stream selected has been that in all issue passages, code check is minimum, then keep the current selection issuing passage；
If network state is unsteady state, and code check is minimum in the code check not all issue passage issuing passage correspondence code stream currently selected, the code check then selecting code stream is less than the code check of the code stream issued in passage currently selected, and the issue passage the highest greater than or equal to code check in the issue passage of lowest bit rate is as the newly selected issue passage.
4. network congestion adaptive approach in a transmission of multimedia streams system, it is characterised in that comprise the following steps:
Step 1, multimedia sources module prepare each multimedia data stream to be released, each multimedia data stream includes same content, equal resolution, the code stream of different code check, and the multimedia data stream that each is to be released is registered to management services module by multimedia sources module；
Step 2, client modules, according to the requirement of user, send multimedia data stream request to management services module, and request transmits certain the most issued multimedia data stream, and initial bit rate；
The multimedia data stream that step 3, management services module receive from client modules is asked, and searches requested multimedia data stream in the most chartered multimedia data stream；The initial code check notice multimedia release module that code check corresponding to the resolution of the code stream of requested multimedia data stream, each code stream and client modules are required by management services module, multimedia release module is that the code stream of each code check of requested multimedia data stream sets up issue passage respectively；
The code check of the code stream that the initial code check of step 4, multimedia release module foundation is corresponding with each issue passage, selects to issue code check and the initial code check immediate issue passage of corresponding code stream in passage, as the current issue passage selected；
Corresponding code stream in multimedia sources module is published to transport module by step 5, the current passage of issuing selected；
Step 6, transport module by bit stream to client modules；
Step 7, client modules receive code stream, and playback/echo is to user；And add up the packet receiving statistical information receiving code stream, packet receiving statistical information includes the average transmission time delay of message, packet loss；Packet receiving statistical information is fed back to the network congestion condition monitoring modular of server end,
Step 8, network congestion condition monitoring modular receive the packet receiving statistical information from client modules, it is judged that network state is steady statue or unsteady state, and network state is advertised to multimedia release module；
The initial bit rate that step 9, multimedia release module select according to client modules, the current code check selecting to issue passage correspondence code stream, and the network state that network congestion condition monitoring modular is noticed, select to reduce, improve or maintain the code check of multimedia data stream to be released.
Network congestion adaptive approach in a kind of transmission of multimedia streams system the most according to claim 4, it is characterised in that described network state judges in the following manner:
If average transmission time delay is less than or equal to the delay threshold preset, and packet loss is less than or equal to the packet loss threshold value preset, then judge that network state is steady statue；Otherwise, it is judged that network state is unsteady state.
Network congestion adaptive approach in a kind of transmission of multimedia streams system the most according to claim 4, it is characterised in that described step 9 comprises the following steps:
If step 9.1 network state is steady statue, and the current issue passage selected is (if reaching this step for the first time, then the current issue passage selected herein selects in step 4；If being repeatedly to arrive this step, the current issue passage selected the most herein, upper once arrive step 10 time select) code check of corresponding code stream is less than the initial bit rate of user's request, then select the code check code check higher than the current code stream issued in passage selected of code stream, and the issue passage minimum less than or equal to code check in the issue passage of the initial bit rate of user's request is as the newly selected issue passage, returns step 5；
If step 9.2 network state is steady statue, and the current code check issuing passage correspondence code stream selected is equal with the initial bit rate that user asks or higher than initial bit rate, then keeps the current selection issuing passage；Return step 6；
If step 9.3 network state is unsteady state, and the current code check issuing passage correspondence code stream selected has been that in all issue passages, code check is minimum, then keep the current selection issuing passage；Return step 6；
If step 9.4 network state is unsteady state, and code check is minimum in the code check not all issue passage issuing passage correspondence code stream currently selected, then select the code check code check less than the current code stream issued in passage selected of code stream, and the issue passage the highest greater than or equal to code check in the issue passage of lowest bit rate is as the newly selected issue passage, returns step 5.
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