CN104093088B - Realize that adaptive stream media plays the system and method for control - Google Patents
Realize that adaptive stream media plays the system and method for control Download PDFInfo
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Abstract
The system that adaptive stream media plays control is realized the present invention relates to a kind of, including signaling resolution module, front end drainage module, local Streaming Media streams module and stream medium data distribution module, the method that adaptive stream media plays control is realized present invention also offers a kind of, when multicast coordination not being supported to transmission network, front end drainage module obtains the streaming media signal of distal end streaming media server by way of unicast, stream medium data distribution module carries out drainage broadcasting, the streaming media signal of broadcasting is needed when having been cached in local Streaming Media streams module, drainage can then be played from local Streaming Media streams module.Employ the system for realizing adaptive stream media broadcasting control of the invention, the video playback to cross-network segment can be realized, no longer strictly necessary bottom-layer network supports multicast protocol, requirement to the network bandwidth is substantially reduced, realize a drainage of same program, simple structure, it is easy to install, with wider range of application.
Description
Technical field
The present invention relates to streaming media service field, more particularly to streaming media service gateway field, a kind of realization is specifically referred to
Adaptive stream media plays the system and method for control.
Background technology
Streaming media service gateway subsystem (Streaming Service Gateway, SSG) is intended to provide a user with various
The service platform of property media resource.
SSG platforms can either provide a user with the streaming media service of local audio and video resources, it is also possible to index remote in network
End audio and video resources, and media forwarding service is provided a user with, searched for not between broad medium resource so as to eliminate user
Just.
The platform is while above-mentioned local and distant end media service is provided, additionally it is possible to media while media services
The treatment that stream is customized, such as bandwidth control, Qos (Quality of Service, service quality) detections, transcoding function
Deng.
In traditional enterprise's streaming media service solution, streaming media server provides streaming media service, it is allowed to client
Video processing is carried out by accessing streaming media service.Streaming media server passes through multicast UDP (User Datagram
Protocol, User Datagram Protocol) mode provides live broadcast service, by unicast RTSP (Real Time Streaming
Protocol, real time streaming transport protocol) mode provides order program service, does not account for the requirement to network, and use is all acquiescence
The corresponding video stream media agreement of network support, as shown in Figure 1.
Corresponding solution also comparative maturity, but there are 2 technical deficiencies of key in this scheme：
(1) when direct broadcast service is provided, it is necessary to whole network it is whole support multicast routing protocol but, in certain applications
Under scape, in the case of especially the VPN in public network realizes trans-regional Intranet, network does not support that multicast or configuring maintenance are number
Tired, how this when will realize the streaming media playing of user
In order to realize live viewing effect, traditional solution is that video multicast is carried by the mode of unicast of RTSP
For the defect of this solution is that each user is required for individually drawing RTSP streams all the way over the backbone, to the band of network
Width is a greatly waste；
(2) when streaming media server is accessed by unicast there is the situation of multiple user concurrents, so in client
The concurrency performance requirement of convection media server gateway is very high, bottleneck is easily formed, while to the bandwidth requirement of transmission network
Too high, especially when cross-network segment, backbone transport expense is excessive.
For example, somewhere Radio, Film and Television Administration, content server is with supervision server not in same computer room, it is necessary to remotely access interior
The streaming media server in appearance area, but the passage of intermediate conveyor, as a result of public network VPN (Virtual Private
Network, VPN) tunneling technique, it is impossible to flexible configuration Multicast Routing, the access of all clients is required for leading to
Mode of unicast access is crossed, simultaneously because public network relatively costly, Bandwidth-Constrained, easily interim card occurs when multi-user orientation
The problems such as, have a strong impact on the work of user.
The content of the invention
The purpose of the present invention is the shortcoming for overcoming above-mentioned prior art, there is provided it is a kind of can realize to cross-network segment
Video playback, no longer strictly necessary bottom-layer network support multicast protocol, the requirement to the network bandwidth to substantially reduce, simple structure,
What is be easy to implement realizes that adaptive stream media plays the system and method for control.
To achieve these goals, it is of the invention to realize that adaptive stream media plays the system and method for control with as follows
Constitute：
This realizes the system that adaptive stream media plays control, and it is mainly characterized by, and described system includes：
Signaling resolution module, the playing request signaling for being used to parse client transmission obtains described playing request signaling pair
The broadcasting control instruction answered, and described broadcasting control instruction is sent to front end drainage module or local Streaming Media crossfire mould
Block；
Front end drainage module, to described in reception signaling resolution module send described in broadcasting control instruction, and
The corresponding distal end streaming media signal of broadcasting control instruction described in being obtained from the streaming media server of distal end, and described in transmission
Distal end streaming media signal is to stream medium data distribution module；
Local Streaming Media streams module, the described broadcasting control for being used to receive described signaling resolution module transmission refers to
Order, and the described corresponding local streaming media signal of broadcasting control instruction is sent to described stream medium data distribution module；
Stream medium data distribution module, is used to the distal end streaming media signal described in described front end drainage module is sent
Or the local streaming media signal that described local Streaming Media streams module sends is sent to corresponding client.
Wherein, described playing request signaling is live demand signalling or order request signaling, and described broadcasting control refers to
It is live control instruction or program request control instruction to make, a pair of described playing request signaling and described broadcasting control instruction 1
Should, the computer or television machine networked that described client is used for user, described front end drainage module spreads for support
The Streaming Media acquisition module of defeated agreement, described stream medium data distribution module is the Streaming Media gateway for supporting multicast protocol.
Further, there is broadcasting form judging unit and control instruction judging unit in described signaling resolution module,
Wherein：
Whether described broadcasting form judging unit, the network for being used to the client connection for judging described supports multicast side
Formula, and will determine that result feeds back to described signaling resolution module；
Described control instruction judging unit, is used to judge whether described broadcasting control instruction is program request control instruction,
And will determine that result feeds back to described signaling resolution module.
Further, there is local streaming media playlist unit in described local Streaming Media streams module, it is described
Local streaming media playlist unit is used to store the information of local streaming media signal.
Further, described signaling resolution module includes that local stream media information reading unit and local Streaming Media are believed
Breath comparison unit, wherein：
Described local stream media information reading unit, is used to read described local streaming media playlist unit storage
Local streaming media signal information；
Described local stream media information comparison unit, is used to contrast the corresponding Streaming Media letter of described broadcasting control instruction
Number and the information of local streaming media signal that reads of described local stream media information reading unit, and judge described local stream
It is corresponding with the presence or absence of described broadcasting control instruction in the information of the local streaming media signal that media information reading unit reads
Streaming media signal, and will determine that result feeds back to described front end drainage module.
Further, there are transcoding units, described transcoding units are used to turn in described stream medium data distribution module
Change the video format of described distal end streaming media signal.
Further, there is broadband control unit, described broadband control unit is used in described front end drainage module
With the broadcasting control instruction that the signaling resolution module described according to network bandwidth resources judging whether response sends, and according to described
Distal end streaming media signal judge whether start described in transcoding units.
Further, described front end drainage module is obtained by host-host protocol from described distal end streaming media server
The described corresponding streaming media signal of broadcasting control instruction, described host-host protocol is RTSP agreements, http protocol
(Hypertext Transfer Protocol, HTTP) or RTMP agreements (Real Time Messaging
Protocol, real-time messages transportation protocol).
Additionally, the present invention also provides a kind of method for realizing adaptive stream media broadcasting control, the method includes following step
Suddenly：
(1) the signaling resolution module described in receives the playing request signaling that client sends；
(2) the playing request signaling described in the parsing of signaling resolution module described in obtains described playing request signaling correspondence
Broadcasting control instruction；
(3) the signaling resolution module described in sends described broadcasting control instruction to described front end drainage module or described
Local Streaming Media streams module；
(4) the local Streaming Media streams module described in sends out the described corresponding local streaming media signal of broadcasting control instruction
Deliver to described stream medium data distribution module；
(5) it is corresponding that the front end drainage module described in obtains described broadcasting control instruction from the streaming media server of distal end
Distal end streaming media signal, and send described distal end streaming media signal to described stream medium data distribution module；
(6) stream medium data distribution module described in described front end drainage module is sent described in distal end Streaming Media
The local streaming media signal that signal or described local Streaming Media streams module send is sent to corresponding client.
Further, it is further comprising the steps of after described step (6)：
(7) the stream medium data distribution module described in sends to described local stream matchmaker described distal end streaming media signal
Body server；
(8) the distal end streaming media signal described in local streaming media server caching described in, and matchmaker is flowed into described distal end
The information of body signal is sent to described local streaming media playlist unit；
(9) information of the distal end streaming media signal described in the storage of local streaming media playlist unit described in.
Further, there is local streaming media playlist unit in described local Streaming Media streams module, it is described
It is further comprising the steps of before step (1)：
(0) the local streaming media playlist unit described in stores the information of local streaming media signal.
Further, there is local stream media information reading unit and local Streaming Media in described signaling resolution module
Information comparison unit, described signaling resolution module sends described broadcasting control instruction to described front end drainage module or institute
The local Streaming Media streams module stated, comprises the following steps：
(3.1) the local stream media information reading unit described in reads described local streaming media playlist unit storage
Local streaming media signal information；
(3.2) the local stream media information comparison unit described in contrasts described streaming media signal and described local stream matchmaker
The information of body signal, and judge to whether there is described streaming media signal in the information of described local streaming media signal；
(3.3) if described judged result be described local streaming media signal information in there is described Streaming Media
Signal, then continue step (3.4), otherwise continues step (3.5)；
(3.4) the signaling resolution module described in sends described broadcasting control instruction to described local Streaming Media crossfire mould
Block, and return to above-mentioned steps (4)；
(3.5) the signaling resolution module described in sends described broadcasting control instruction to described front end drainage module, and
Return to above-mentioned steps (5).
Further, there is broadcasting form judging unit and control instruction to judge single in described signaling resolution module
Unit, it is further comprising the steps of between described step (3.3) and step (3.4)：
Control instruction judging unit described in (3.3.1) judges whether described broadcasting control instruction is that program request control refers to
Order；
(3.3.2) is if it is judged that be live control instruction, then continuation step (3.5) otherwise continues step (3.3.3)
Broadcasting form judging unit described in (3.3.3) judges whether the network of described client connection supports multicast side
Formula；
(3.3.4) then continues step if it is judged that be the network support multicast mode of described client connection
(3.3.5), otherwise continues step (3.5)；
Client described in (3.3.5) adds the multicast group of described stream medium data distribution module.
Further, described stream medium data distribution module will be remote described in described front end drainage module transmission
The local streaming media signal that end streaming media signal or described local Streaming Media streams module send is sent to corresponding client
End, comprises the following steps：
(6.1) the stream medium data distribution module described in judges whether described client adds described multicast group；
(6.2) if it is judged that for described client adds described multicast group, then continuing step (6.3), otherwise
Continue step (6.4)；
(6.3) matchmaker is flowed in the distal end described in described front end drainage module transmission by the stream medium data distribution module described in
The local streaming media signal that body signal or described local Streaming Media streams module send is sent right to institute by way of multicast
The client answered；
(6.4) matchmaker is flowed in the distal end described in described front end drainage module transmission by the stream medium data distribution module described in
The local streaming media signal that body signal or described local Streaming Media streams module send is sent right to institute by way of unicast
The client answered.
Further, described front end drainage module includes broadband control unit, between described step (4) and (5), bag
Include following steps：
(4.1) the signaling resolution module of broadband control unit described according to network bandwidth resources judge whether response
The broadcasting control instruction of transmission；
(4.2) if it is judged that the broadcasting control instruction of the signaling resolution module transmission described in response, then continue to walk
Suddenly (5), above-mentioned steps (6) are otherwise returned.
Further, there are transcoding units in described stream medium data distribution module, described step (5.2) it
Afterwards, it is further comprising the steps of：
(4.3) the broadband control unit described in judges whether the video resolution of described distal end streaming media signal is excessive；
(4.4) if it is judged that for video resolution is excessive, then continuing step (5.5), step (6) is otherwise continued；
(4.5) the broadband control unit described in sends to described stream medium data distribution module enabled instruction.
Further, between described step (5) and (6), comprise the following steps：
(5.1) the stream medium data distribution module described in judges whether to receive the startup that described broadband control unit sends
Instruction；
(5.2) if it is judged that to receive the enabled instruction that described broadband control unit sends, then continuing step
(5.3) step (6), is otherwise continued；
(5.3) the stream medium data distribution module described in starts described transcoding units；
(5.4) video format of the distal end streaming media signal described in transcoding units conversion described in.
The system and method for realizing adaptive stream media broadcasting control in the invention is employed, for streaming media server
With client when cross-network segment is accessed, or when not supporting multicast coordination to transmission network, it is allowed to which client passes through
Drainage module in front end connects distal end streaming media server, and front end drainage module carries out drainage broadcasting by way of unicast, drop
The low requirement to network, while to avoid the flow in this network segment, stream medium data distribution module from supporting that the mode of multicast is come
Improve streaming media service.
Meanwhile, stream medium data distribution module carries out same management and running to the video access of client, identical to accessing
The client of channel and program, local streaming media server is redirected to by user access request, is reduced to distal end Streaming Media
The access of server is concurrent, improves the utilization rate of server and the network bandwidth.
In addition, the present invention is reduced to network project and design on the basis of can supervising function conventional video monitoring is realized
Requirement, to the video playback of cross-network segment, no longer strictly necessary bottom-layer network supports multicast protocol, especially on public network
VPN private networks are designed；Requirement to the network bandwidth is substantially reduced, and realizes a drainage of same program, the forwarding of LAN inside, tool
There is wider range of application.
Brief description of the drawings
Fig. 1 is the annexation schematic diagram of streaming media server and client in the prior art.
Fig. 2 is the structural representation of the system for realizing adaptive stream media broadcasting control of the invention.
Fig. 3 is the general flow chart of the method for realizing adaptive stream media broadcasting control of the invention.
Fig. 4 is the overall flow figure of the method for realizing adaptive stream media broadcasting control of the invention.
Fig. 5 is the schematic diagram for not supporting multicast of the method for realizing adaptive stream media broadcasting control of the invention.
Fig. 6 is the schematic diagram of the local cache of the method for realizing adaptive stream media broadcasting control of the invention.
Fig. 7 is the schematic diagram of multiple playing requests of the method for realizing adaptive stream media broadcasting control of the invention.
Specific embodiment
In order to more clearly describe technology contents of the invention, carried out with reference to specific embodiment further
Description.
Refer to shown in Fig. 2, in one embodiment, realize that adaptive stream media is played the system for controlling and included：
Signaling resolution module, the playing request signaling for being used to parse client transmission obtains described playing request signaling pair
The broadcasting control instruction answered, and described broadcasting control instruction is sent to front end drainage module or local Streaming Media crossfire mould
Block；
Front end drainage module, to described in reception signaling resolution module send described in broadcasting control instruction, and
The corresponding distal end streaming media signal of broadcasting control instruction described in being obtained from the streaming media server of distal end, and described in transmission
Distal end streaming media signal is to stream medium data distribution module；
Local Streaming Media streams module, the described broadcasting control for being used to receive described signaling resolution module transmission refers to
Order, and the described corresponding local streaming media signal of broadcasting control instruction is sent to described stream medium data distribution module；
Stream medium data distribution module, is used to the distal end streaming media signal described in described front end drainage module is sent
Or the local streaming media signal that described local Streaming Media streams module sends is sent to corresponding client.
Wherein, described playing request signaling is live demand signalling or order request signaling, and described broadcasting control refers to
It is live control instruction or program request control instruction to make, a pair of described playing request signaling and described broadcasting control instruction 1
Should, the computer or television machine networked that described client is used for user, described front end drainage module spreads for support
The Streaming Media acquisition module of defeated agreement, described stream medium data distribution module is the Streaming Media gateway for supporting multicast protocol.
In addition, when technical scheme is implemented, modules can use existing in the prior art
Ripe hardware product.
Described signaling resolution device can use signalling analysis equipment of the prior art, and such as Guangdong preferably leads to century science and technology
The signaling decoding analyzing and processing equipment of limited company, or the Agilent mobile signaling protocol of Anjelen Sci. ＆ Tech. Inc is analyzed
Instrument, or Nanjing Wei Neng telecom technology co., ltds Signaling Analyzer, model DS71E.
Described front end drainage system can use Streaming Media capture card of the prior art, such as Beijing Tong Zhou to regard up to science and technology
The omnipotent high resolution audio and video capture cards of T220E of Co., Ltd, or the quick SDK3000 video frequency collection cards in day, or Canopus HDSTORM
Video frequency collection card,
Described stream medium data dispensing device can be using the Streaming Media gateway of Zhuoyang Sci. ＆ Tech. Co., Ltd., Shanghai, model
It is VE-6000, or scientific and technological limited public affairs is led to using the digital video signal stream media service system of digital video signal company, or perfect the regarding in Beijing
The WMG Streaming Media gateways of department.
Described local Streaming Media crossfire device can be using very universal itself carries memory in the prior art
DST PLAYER, it is possible to achieve the audio frequency and video of various common formats are stored and played.
In a preferred embodiment, there is broadcasting form judging unit and control in described signaling resolution module
Instruction judging unit, wherein：
Whether described broadcasting form judging unit, the network for being used to the client connection for judging described supports multicast side
Formula, and will determine that result feeds back to described signaling resolution module；
Described control instruction judging unit, is used to judge whether described broadcasting control instruction is program request control instruction,
And will determine that result feeds back to described signaling resolution module.
In a preferred embodiment, arranged with local streaming media playing in described local Streaming Media streams module
Table unit, described local streaming media playlist unit is used to store the information of local streaming media signal.
Described local streaming media playlist unit is that the information of the local streaming media signal to playing is carried out
Caching, will not retain relevant information substantially after finishing, be real-time streaming media service, and if necessary to store, user can be with
It is recorded in local service by recording function, the problem of copyright and the requirement to storing will not be brought.
In a kind of preferred implementation method, described signaling resolution module includes local stream media information reading unit
With local stream media information comparison unit, wherein：
Described local stream media information reading unit, is used to read described local streaming media playlist unit storage
Local streaming media signal information；
Described local stream media information comparison unit, is used to contrast the corresponding Streaming Media letter of described broadcasting control instruction
Number and the information of local streaming media signal that reads of described local stream media information reading unit, and judge described local stream
It is corresponding with the presence or absence of described broadcasting control instruction in the information of the local streaming media signal that media information reading unit reads
Streaming media signal, and will determine that result feeds back to described front end drainage module.
In a preferred embodiment, there are transcoding units in described stream medium data distribution module, it is described
Transcoding units are used to the video format of the distal end streaming media signal for changing described.
In a kind of preferred implementation method, there is broadband control unit in described front end drainage module, it is described
Broadband control unit is used to the broadcasting control that the signaling resolution module according to network bandwidth resources judge whether response sends
Instruction, and the transcoding units according to described distal end streaming media signal judges whether startup.
Wherein, described bandwidth control units can be using the fair share device PureFlow of An Li networks Co., Ltd.
FS10CATV devices, or Packteer companies of the U.S. Bandwidth Broker.
In a preferred embodiment, described front end drainage module flows matchmaker by host-host protocol from described distal end
Obtain the described corresponding streaming media signal of broadcasting control instruction in body server, described host-host protocol is RTSP agreements,
Http protocol or RTMP agreements.
Additionally, the present invention also provides a kind of method for realizing adaptive stream media broadcasting control, as shown in figure 3, the method
Comprise the following steps：
(1) the signaling resolution module described in receives the playing request signaling that client sends；
(2) the playing request signaling described in the parsing of signaling resolution module described in obtains described playing request signaling correspondence
Broadcasting control instruction；
(3) the signaling resolution module described in sends described broadcasting control instruction to described front end drainage module or described
Local Streaming Media streams module；
(4) the local Streaming Media streams module described in sends out the described corresponding local streaming media signal of broadcasting control instruction
Deliver to described stream medium data distribution module；
(5) it is corresponding that the front end drainage module described in obtains described broadcasting control instruction from the streaming media server of distal end
Distal end streaming media signal, and send described distal end streaming media signal to described stream medium data distribution module；
(6) stream medium data distribution module described in described front end drainage module is sent described in distal end Streaming Media
The local streaming media signal that signal or described local Streaming Media streams module send is sent to corresponding client.
In a preferred embodiment, it is further comprising the steps of after described step (6)：
(7) the stream medium data distribution module described in sends to described local stream matchmaker described distal end streaming media signal
Body server；
(8) the distal end streaming media signal described in local streaming media server caching described in, and matchmaker is flowed into described distal end
The information of body signal is sent to described local streaming media playlist unit；
(9) information of the distal end streaming media signal described in the storage of local streaming media playlist unit described in.
In a preferred embodiment, arranged with local streaming media playing in described local Streaming Media streams module
Table unit, it is further comprising the steps of before described step (1)：
(0) the local streaming media playlist unit described in stores the information of local streaming media signal.
In a kind of preferred implementation method, in described signaling resolution module there is local stream media information to read single
First and local stream media information comparison unit, described signaling resolution module sends described broadcasting control instruction to before described
End drainage module or described local Streaming Media streams module, comprise the following steps：
(3.1) the local stream media information reading unit described in reads described local streaming media playlist unit storage
Local streaming media signal information；
(3.2) the local stream media information comparison unit described in contrasts described streaming media signal and described local stream matchmaker
The information of body signal, and judge to whether there is described streaming media signal in the information of described local streaming media signal；
(3.3) if described judged result be described local streaming media signal information in there is described Streaming Media
Signal, then continue step (3.4), otherwise continues step (3.5)；
(3.4) the signaling resolution module described in sends described broadcasting control instruction to described local Streaming Media crossfire mould
Block, and return to above-mentioned steps (4)；
(3.5) the signaling resolution module described in sends described broadcasting control instruction to described front end drainage module, and
Return to above-mentioned steps (5).
In a kind of preferred implementation method, there is broadcasting form judging unit and control in described signaling resolution module
System instruction judging unit, it is further comprising the steps of between described step (3.3) and step (3.4)：
Control instruction judging unit described in (3.3.1) judges whether described broadcasting control instruction is that program request control refers to
Order；
(3.3.2) is if it is judged that be live control instruction, then continuation step (3.5) otherwise continues step (3.3.3)
Broadcasting form judging unit described in (3.3.3) judges whether the network of described client connection supports multicast side
Formula；
(3.3.4) then continues step if it is judged that be the network support multicast mode of described client connection
(3.3.5), otherwise continues step (3.5)；
Client described in (3.3.5) adds the multicast group of described stream medium data distribution module.
In a kind of preferred implementation method, described stream medium data distribution module is by described front end drainage module
The local streaming media signal that the described distal end streaming media signal for sending or described local Streaming Media streams module send sends
To corresponding client, comprise the following steps：
(6.1) the stream medium data distribution module described in judges whether described client adds described multicast group；
(6.2) if it is judged that for described client adds described multicast group, then continuing step (6.3), otherwise
Continue step (6.4)；
(6.3) matchmaker is flowed in the distal end described in described front end drainage module transmission by the stream medium data distribution module described in
The local streaming media signal that body signal or described local Streaming Media streams module send is sent right to institute by way of multicast
The client answered；
(6.4) matchmaker is flowed in the distal end described in described front end drainage module transmission by the stream medium data distribution module described in
The local streaming media signal that body signal or described local Streaming Media streams module send is sent right to institute by way of unicast
The client answered.
In a preferred embodiment, described front end drainage module includes broadband control unit, described step
(4) and (5) between, comprise the following steps：
(4.1) the signaling resolution module of broadband control unit described according to network bandwidth resources judge whether response
The broadcasting control instruction of transmission；
(4.2) if it is judged that the broadcasting control instruction of the signaling resolution module transmission described in response, then continue to walk
Suddenly (5), above-mentioned steps (6) are otherwise returned.
In a kind of preferred implementation method, there are transcoding units in described stream medium data distribution module, it is described
The step of (5.2) after, it is further comprising the steps of：
(4.3) the broadband control unit described in judges whether the video resolution of described distal end streaming media signal is excessive；
(4.4) if it is judged that for video resolution is excessive, then continuing step (5.5), step (6) is otherwise continued；
(4.5) the broadband control unit described in sends to described stream medium data distribution module enabled instruction.
In a kind of preferred implementation method, between described step (5) and (6), comprise the following steps：
(5.1) the stream medium data distribution module described in judges whether to receive the startup that described broadband control unit sends
Instruction；
(5.2) if it is judged that to receive the enabled instruction that described broadband control unit sends, then continuing step
(5.3) step (6), is otherwise continued；
(5.3) the stream medium data distribution module described in starts described transcoding units；
(5.4) video format of the distal end streaming media signal described in transcoding units conversion described in.
Wherein, in the mode of specific implementation unicast, mode of unicast of the invention supports various modes：
1st, traditional RTSP unicast modes；
2nd, the HTTP mode of unicast of far-end video ftp server, by the way of gradual download, so solves distal end clothes
Business device does not have the situation of streaming media service function, it is only necessary to which FTP video file service functions are supported in opposite end, and Streaming Media gateway passes through
HTTP unitcast requests mode carries out file to the treatment of unicast stream.
In addition, the present invention does on the basis of Streaming Media multicast extending, the encoding and decoding of video can be carried out to unicast stream, it is real
Now various video stream bit rate etc. is flexibly set and is processed.
Streaming Media gateway supports that the mode of multicast does not have special technological means, is essentially all standard multicast agreement, this
Invention can also use IGMP (Internet Group Management Protocol, IGMP) V3 versions
Multicast protocol, using this characteristic, the user of multicast can be controlled, it is allowed to recipient add particular source it is specific
Group；On the basis of multicast, system is also supported to provide the function of HTTP streaming media services, by supporting HLS (HTTP Live
Streaming, a kind of agreement for real-time streaming transport based on HTTP) stream media protocol, support that Android, apple etc. are mobile eventually
The multi-screen at end is played.
Additionally, the present invention is not related to to PHY layer (Physics, physical layer), MAC layer (Media Access
Control, media access control layer) protocol modification, therefore whole technical scheme can realize on IP based network, logical
With, it is open and with flexibility, have than larger advantage.
The corresponding entire flow figure of the specific embodiment of the present invention is illustrated in figure 4, is come below by embodiment
Illustrate：
As shown in figure 5, sending a live demand signalling for client, live CCTV1 is such as asked, because network is not propped up
UDP multicast protocols are held, client cannot be played out by way of being directly added into multicast, drainage module in front end passes through RTSP side
Formula obtains live signal from distal end streaming media server, solves the problems, such as that network does not support that multicast UDP (is noted, it is necessary in stream
Media server side configures corresponding Streaming Media gateway or other equipment, realizes that the RTSP modes of live signal are provided).
As shown in fig. 6, sending same live demand signalling to multi-client, such as multiple client asks live CCTV1,
Streaming media service gateway obtains live signal by RTSP modes from distal end streaming media server.In local area network, Streaming Media
Data distribution module provides user and watches by way of multicast or unicast.This scene is as a result of local Streaming Media crossfire
The caching of module, reduces the concurrently requirement to distal end streaming media server, and the access of multiple users is in distal end streaming media service
There was only a drainage at device, there is provided the concurrency performance of whole system.
As shown in fig. 7, for the different demand signallings of multi-user, such as client 1 sends live demand signalling, and request is broadcast
CCTV1 is put, client 2 sends order request signaling, and CCTV2 is played in request, and signaling resolution module is it is first determined whether there is multiple
User accesses the situation of same video, and 1 part is only needed in the streaming media signal of 2 network segments, reduces the requirement of the network bandwidth,
The unicast stream in Streaming Media and multicast data flow are shunted by stream medium data distribution module, and is respectively sent to client 1 and visitor
Family end 2, client 1 and client 2 have played CCTV1 and CCTV2 programs respectively, and client 3 is now added, it is desirable to watched
CCTV1, this when, signaling resolution module judges to have existed for CCTV1 in local playlist, either using unicast
Mode or multicast mode, now only need to distribute a video flowing again by local Streaming Media streams module, it is not necessary to
Drainage is carried out to streaming media server again again, that is, reduces the signaling traffic load of distal end streaming media server, while also saving
Bandwidth, the concurrency performance of lifting system.
Additionally, for receiving multiple playing request signalings simultaneously, signaling resolution module is entered to the playing request signaling of user
Row record management, such as records the source address of user, request protocol type and the address situation played, when first user's initiation please
When asking, signaling resolution module finds do not have in this request historical record, therefore signaling resolution module will play control instruction,
The Streaming Media address that i.e. user's request is played is sent to front end drainage module, and user-related video flowing is incorporated into Streaming Media point
Hair module, stream medium data distribution module establishes a local streaming media playlist, as shown in the table, wherein locally stream matchmaker
Body playlist can be stored in local Streaming Media streams module, and the incidence relation for so completing following table is set up.Second use
When request is initiated at family, signaling resolution module is detected from list, if not finding, is increased newly, if finding user's request signaling
Broadcast address have, then the local streaming media signal for directly being obtained from local Streaming Media streams module, i.e., local Streaming Media
Address of service, user is directly played out using local streaming media service address.
Signaling resolution module is parsed and recognized automatically according to protocol type and related protocol, for example：
1. programme televised live, it is live conventional to use UDP addresses, such as UDP：//233.1.1.1:8080：To live, pass through
(Moving Pictures Experts Group/Motion Pictures Experts Group are moved MPEG in monitoring UDP
State motion picture expert group version) agreement SI (Specific Information, customizing messages)/PSI (program Specific
Information, Program Specific Information) field information obtains programm name；
2. request program, generally uses RTSP agreements, according to the SDP (Session that RTSP playing requests are interacted
Description Protocol, Session Description Protocol) information and RTSP addresses, i.e. RTSP URL (Uniform Resoure
Locator, URL) determine whether same program.
If above-mentioned field cannot provide programme information, system is decided whether to be played for identical still according to absolute address and saved
Mesh.
In addition, when stream medium data distribution module has multicast functionality, stream medium data distribution module is assisted by multicast
View completes the distribution work of streaming media signal.Stream medium data distribution module can be made to each program in the service that Intranet is provided
For a multicast services are provided, client play when, the request that signaling resolution module passes through identifying user, identifying user
The programme content of request, and the multicast address of Intranet offer is provided, user is when playing by adding stream medium data
The multicast group of distribution module is completed, and the present invention is the multicast realized by operating system, is not exclusively relied on router and is realized.
If what multiple user's requests were played is same program, due to all adding with a multicast group, by group
Duplication is broadcast, the program distribution to multi-user is completed,
Different programs are asked different user, and what user added is different program multicast groups, therefore by different
Multicast group is distributed.
Specific ways of distribution is realized using the multicast distribution tree mechanism of standard.
In the drainage process of front end, system supports monitoring to real time flow medium bandwidth, and according to equipment cpu busy percentage,
Situations such as memory usage, network interface bandwidth, according to the requirement of policy control, carry out corresponding video code conversion.Improve whole
The bandwidth availability ratio of network.
Described bandwidth control units, main seven layers of bag detection function using similar DPI, the overall flow of monitoring network
With the situation of Video Applications, find the situation of network and real-time control can be carried out, mainly carry out qos policy control.Its basis
The bandwidth resources of network determine the Access Control of each video playback, and the distribution and release of bandwidth are carried out for the request for receiving.
Meanwhile, it is also responsible for the generation of control strategy, for example, decide whether that starting transcoding units carries out transcoding work.
Such as upper table, in the case where total bandwidth is limited, broadband control device by front end to streaming media distribution module it
Between bandwidth monitoring, when find needed for request play bandwidth availability ratio be already higher than certain setting thresholding, just to correlation stream
Amount carries out QOS management, and such as live priority of the priority higher than order request, the means of control include traditional IP QOS
Strategy such as speed limit, queue shaping, obstruction and access restriction.
When bandwidth control units find that the existing bandwidth of network cannot meet new user's request, except being not responding to letter
The broadcasting control instruction for making parsing module send, can no longer receive new request, it is also possible to root with notice signaling parsing module
According to needs, transcoding is carried out to existing drainage content, the purpose of transcoding is the bandwidth for reducing video code rate, so in same band
In the case of, more drainages can be allowed to ask.But because transcoding needs to consume the resources such as the CPU of front end, therefore transcoding
Premise be monitoring, the performance of whole front end also meets support transcoding requirement.
The principle of transcoding utilizes cpu resource, and resolution ratio, code check to video etc. are adjusted, and is not influenceing to watch experience
In the case of, as far as possible using low video resolution.Conversion between such as different video form, such as from MPEG-2 forms or
MPEG-4 forms go to H.264 form；In terms of content transmission, change bit rate and meet heterogeneous networks bandwidth or device plays
The demand of speed；In terms of definition, HD video is switched into SD, even lower smoothness.
The system and method for realizing adaptive stream media broadcasting control in the invention is employed, for streaming media server
With client when cross-network segment is accessed, or when not supporting multicast coordination to transmission network, it is allowed to which client passes through
Drainage module in front end connects distal end streaming media server, and front end drainage module carries out drainage broadcasting by way of unicast, drop
The low requirement to network, while to avoid the flow in this network segment, stream medium data distribution module from supporting that the mode of multicast is come
Improve streaming media service.
Meanwhile, stream medium data distribution module carries out same management and running to the video access of client, identical to accessing
The client of channel and program, local streaming media server is redirected to by user access request, is reduced to distal end Streaming Media
The access of server is concurrent, improves the utilization rate of server and the network bandwidth.
In addition, the present invention is reduced to network project and design on the basis of can supervising function conventional video monitoring is realized
Requirement, to the video playback of cross-network segment, no longer strictly necessary bottom-layer network supports multicast protocol, especially on public network
VPN private networks are designed；Requirement to the network bandwidth is substantially reduced, and realizes a drainage of same program, the forwarding of LAN inside, tool
There is wider range of application.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, specification and drawings are considered as illustrative
And it is nonrestrictive.
Claims (18)
1. it is a kind of to realize the system that adaptive stream media plays control, it is characterised in that described system includes：
Signaling resolution module, being used to parse the playing request signaling of client transmission, to obtain described playing request signaling corresponding
Control instruction is played, and described broadcasting control instruction is sent to front end drainage module or local Streaming Media streams module；
Front end drainage module, to the broadcasting control instruction described in being sent in the signaling resolution module described in reception, and from remote
The described corresponding distal end streaming media signal of broadcasting control instruction is obtained in the streaming media server of end, and sends described distal end
Streaming media signal is to stream medium data distribution module；
Local Streaming Media streams module, is used to receive the described broadcasting control instruction that described signaling resolution module sends, and
The described corresponding local streaming media signal of broadcasting control instruction is sent to described stream medium data distribution module；
Stream medium data distribution module, is used to the distal end streaming media signal described in described front end drainage module transmission or institute
The local streaming media signal that the local Streaming Media streams module stated sends is by way of multicast or the mode of unicast is sent to institute
Corresponding client；
There is broadcasting form judging unit in described signaling resolution module, and described broadcasting form judging unit is used to judge
Whether the network of described client connection supports multicast mode, and will determine that result feeds back to described signaling resolution module.
2. it is according to claim 1 to realize the system that adaptive stream media plays control, it is characterised in that described broadcasting
Demand signalling is live demand signalling or order request signaling, and described broadcasting control instruction is live control instruction or point Broadcast Control
System instruction, described playing request signaling is corresponded with described broadcasting control instruction.
3. it is according to claim 2 to realize the system that adaptive stream media plays control, it is characterised in that described signaling
Also there is control instruction judging unit in parsing module, and described control instruction judging unit is used to judge described broadcasting control
Whether system instruction is program request control instruction, and will determine that result feeds back to described signaling resolution module.
4. it is according to claim 1 to realize the system that adaptive stream media plays control, it is characterised in that described is local
There is local streaming media playlist unit, described local streaming media playlist unit is used to deposit in Streaming Media streams module
Store up the information of local streaming media signal.
5. it is according to claim 4 to realize the system that adaptive stream media plays control, it is characterised in that described signaling
Parsing module includes local stream media information reading unit and local stream media information comparison unit, wherein：
Described local stream media information reading unit, is used to the sheet of the local streaming media playlist unit storage for reading described
The information of ground streaming media signal；
Described local stream media information comparison unit, be used to contrast the described corresponding streaming media signal of broadcasting control instruction and
The information of the local streaming media signal that described local stream media information reading unit reads, and judge described local Streaming Media
With the presence or absence of the described corresponding stream matchmaker of broadcasting control instruction in the information of the local streaming media signal that Information reading unit reads
Body signal, and will determine that result feeds back to described front end drainage module.
6. it is according to claim 1 to realize the system that adaptive stream media plays control, it is characterised in that described stream matchmaker
There are transcoding units, described transcoding units are used to the video of the distal end streaming media signal for changing described in volume data distribution module
Form.
7. it is according to claim 6 to realize the system that adaptive stream media plays control, it is characterised in that described front end
There is broadband control unit, described broadband control unit is used to judge whether response according to network bandwidth resources in drainage module
The broadcasting control instruction that described signaling resolution module sends, and judged whether to start institute according to described distal end streaming media signal
The transcoding units stated.
8. it is according to claim 1 to realize the system that adaptive stream media plays control, it is characterised in that described front end
Drainage module obtains the described corresponding stream of broadcasting control instruction by host-host protocol from described distal end streaming media server
Media signal, described host-host protocol is RTSP agreements, http protocol or RTMP agreements.
9. it is according to claim 1 to realize the system that adaptive stream media plays control, it is characterised in that described client
The computer or television machine networked used for user is held, described front end drainage module is to support the Streaming Media of flow host-host protocol
Acquisition module, described stream medium data distribution module is the Streaming Media gateway for supporting multicast protocol.
10. a kind of system based on any one of claim 1 to 9 realizes the method that adaptive stream media plays control,
Characterized in that, described method is comprised the following steps：
(1) the signaling resolution module described in receives the playing request signaling that client sends；
(2) the described playing request signaling of signaling resolution module parsing described in obtains that described playing request signaling is corresponding to be broadcast
Put control instruction；
(3) the signaling resolution module described in sends described broadcasting control instruction to described front end drainage module or described sheet
Ground Streaming Media streams module；
(4) local Streaming Media streams module described in by the described corresponding local streaming media signal of broadcasting control instruction send to
Described stream medium data distribution module；
(5) the front end drainage module described in obtains the described corresponding distal end of broadcasting control instruction from the streaming media server of distal end
Streaming media signal, and send described distal end streaming media signal to described stream medium data distribution module；
(6) stream medium data distribution module described in described front end drainage module is sent described in distal end streaming media signal
Or the local streaming media signal that sends of described local Streaming Media streams module is by way of multicast or the mode of unicast is sent out
Deliver to corresponding client.
11. methods for realizing adaptive stream media broadcasting control according to claim 10, it is characterised in that described step
Suddenly it is further comprising the steps of after (6)：
(7) described distal end streaming media signal is sent to described local Streaming Media and taken by the stream medium data distribution module described in
Business device；
(8) the distal end streaming media signal described in local streaming media server caching described in, and described distal end Streaming Media is believed
Number information send to described local streaming media playlist unit；
(9) information of the distal end streaming media signal described in the storage of local streaming media playlist unit described in.
12. methods for realizing adaptive stream media broadcasting control according to claim 10, it is characterised in that described sheet
There is local streaming media playlist unit in ground Streaming Media streams module, before described step (1), also including following step
Suddenly：
(0) the local streaming media playlist unit described in stores the information of local streaming media signal.
13. methods for realizing adaptive stream media broadcasting control according to claim 12, it is characterised in that described letter
Making has local stream media information reading unit and local stream media information comparison unit, described signaling resolution in parsing module
Module sends described broadcasting control instruction to described front end drainage module or described local Streaming Media streams module, including
Following steps：
(3.1) the local stream media information reading unit described in reads the sheet of described local streaming media playlist unit storage
The information of ground streaming media signal；
(3.2) streaming media signal and described local Streaming Media letter described in the contrast of local stream media information comparison unit described in
Number information, and judge in the information of described local streaming media signal with the presence or absence of described streaming media signal；
(3.3) if described judged result be described local streaming media signal information in there is described Streaming Media letter
Number, then continue step (3.4), otherwise continue step (3.5)；
(3.4) the signaling resolution module described in sends described broadcasting control instruction to described local Streaming Media streams module,
And return to above-mentioned steps (4)；
(3.5) the signaling resolution module described in sends described broadcasting control instruction to described front end drainage module, and returns
Above-mentioned steps (5).
14. methods for realizing adaptive stream media broadcasting control according to claim 13, it is characterised in that described letter
Making has control instruction judging unit in parsing module, between described step (3.3) and step (3.4), also including following step
Suddenly：
Control instruction judging unit described in (3.3.1) judges whether described broadcasting control instruction is program request control instruction；
(3.3.2) is if it is judged that be live control instruction, then continuation step (3.5) otherwise continues step (3.3.3)
Broadcasting form judging unit described in (3.3.3) judges whether the network of described client connection supports multicast mode；
(3.3.4) then continues step if it is judged that be the network support multicast mode of described client connection
(3.3.5), otherwise continues step (3.5)；
Client described in (3.3.5) adds the multicast group of described stream medium data distribution module.
15. methods for realizing adaptive stream media broadcasting control according to claim 14, it is characterised in that described stream
Media data distribution module described front end drainage module is sent described in distal end streaming media signal or described local stream
The local streaming media signal that media stream module sends is sent to corresponding client, is comprised the following steps：
(6.1) the stream medium data distribution module described in judges whether described client adds described multicast group；
(6.2) if it is judged that for described client adds described multicast group, then continuing step (6.3), otherwise continue
Step (6.4)；
(6.3) the stream medium data distribution module described in believes the distal end Streaming Media described in described front end drainage module transmission
Number or the local streaming media signal that sends of described local Streaming Media streams module sent by way of multicast to corresponding
Client；
(6.4) the stream medium data distribution module described in believes the distal end Streaming Media described in described front end drainage module transmission
Number or the local streaming media signal that sends of described local Streaming Media streams module sent by way of unicast to corresponding
Client.
16. methods for realizing adaptive stream media broadcasting control according to claim 10, it is characterised in that before described
Drainage module in end includes broadband control unit, between described step (4) and (5), comprises the following steps：
(4.1) the signaling resolution module of broadband control unit described according to network bandwidth resources judge whether response sends
Broadcasting control instruction；
(4.2) if it is judged that the broadcasting control instruction of the signaling resolution module transmission described in response, then continue step
(5) above-mentioned steps (6), are otherwise returned.
17. methods for realizing adaptive stream media broadcasting control according to claim 16, it is characterised in that described stream
There are transcoding units in media data distribution module, it is further comprising the steps of after described step (4.2)：
(4.3) the broadband control unit described in judges whether the video resolution of described distal end streaming media signal is excessive；
(4.4) if it is judged that for video resolution is excessive, then continuing step (4.5), step (6) is otherwise continued；
(4.5) the broadband control unit described in sends to described stream medium data distribution module enabled instruction.
18. methods for realizing adaptive stream media broadcasting control according to claim 17, it is characterised in that described step
Suddenly between (5) and (6), comprise the following steps：
(5.1) the stream medium data distribution module described in judges whether that the startup of the broadband control unit transmission for receiving described refers to
Order；
(5.2) if it is judged that to receive the enabled instruction that described broadband control unit sends, then continuing step (5.3),
Otherwise continue step (6)；
(5.3) the stream medium data distribution module described in starts described transcoding units；
(5.4) video format of the distal end streaming media signal described in transcoding units conversion described in.
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| CN107786467A (en) * | 2017-08-28 | 2018-03-09 | 深信服科技股份有限公司 | Drainage method, drainage system and the system of network data based on transparent deployment |
| CN107896336A (en) * | 2017-12-14 | 2018-04-10 | 玲珑视界科技（北京）有限公司 | A kind of system and method that DRM broadcasting agencies are carried out according to live type |
| CN109963203B (en) * | 2017-12-25 | 2021-12-07 | 中国移动通信集团福建有限公司 | Video stream conversion and adaptive switching method and device, equipment and medium |
| CN108521609B (en) * | 2018-02-27 | 2019-05-17 | 北京达佳互联信息技术有限公司 | Determine the method, apparatus and terminal of pushing video type |
| CN111654725B (en) * | 2019-03-04 | 2021-12-21 | 北京开广信息技术有限公司 | Real-time receiving method and client of media stream |
| CN112995707A (en) * | 2021-04-20 | 2021-06-18 | 北京小鸟科技股份有限公司 | System, method and equipment based on cross-network audio and video transcoding scheduling |
| CN114584538B (en) * | 2022-03-01 | 2024-03-22 | 北京智慧星光信息技术股份有限公司 | Mobile streaming media data transmission method, device and storage medium |
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