CN1538696A - Multipath real time video-frequency gateway for supporting large capacity user and its application method - Google Patents
Multipath real time video-frequency gateway for supporting large capacity user and its application method Download PDFInfo
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Abstract
The video gateway includes a reception server for receiving original code stream, N pieces of code conversion server for converting code streams, M pieces of play back server for responding requests of ordering programs from users and a dispatching server for receiving requests of ordering programs from users. Input end of each code conversion server is connected to output end of reception server. Output end of each code conversion server is connected to input end of each play back server. Each play back server is connected to a dispatching server. The advantages are good expansibility, adaptability, availability and stability etc.
Description
Technical field the invention belongs to technical field of computer multimedia, particularly video gateway technology and application technology.
The background technology digital video technology has in the past decade obtained extensive use, and digital video broadcasting (DVB), digital video disk (DVD), Digital Video, remote teaching, online request and video conference etc. are exactly some typical examples.The key that these application are achieved is exactly the formulation of compression of digital video standard, and it makes video satisfy the requirement of people to video quality again when having obtained high compression ratio.At present, in order to adapt to different application scenarios, International Standards Organization has formulated the various video coding standard.For example, H263 is used for occasions such as video telephone and video conference; MPEG-2 is used for occasions such as digital video broadcasting, high definition digital television (HDTV) and DVD; MPEG-4 is used for the stream-type video of the Internet and uses.Along with popularizing of digital video application, adopt the requirement of different coding standard to become more and more urgent with applied environment is different to video data format.For many real-time application, require video data to realize the dynamic real-time conversion usually asking of various coded formats.Video information just is called video code conversion by the process that a kind of coded format converts another kind of coded format to, carries out the video code conversion apparatus operating and be called video gateway.Video code conversion comprises two aspect implications: 1. change in same video encoding standard, for example convert video data to another kind of code rate by a kind of code rate.2. in the different video coding standard, change, will convert video data to by a kind of video data of standard compression by another kind of standard compression.
Video gateway will be finished decoding and the two steps operation of coding again in transcoding process, owing between every kind of video compression standard its specific transcoding algorithm is arranged all, the complexity of its computing well imagines that the performance requirement to machine during specific implementation is higher.A kind of typical video gateway is to be made of the separate unit transcoding server now, the application of this video gateway as shown in Figure 1, this is a kind of service mode based on video server one transcoding server-client terminal structure, its operation principle is: video server is handed down to transcoding server with source code flow, transcoding server is converted into the code stream of another kind of speed or coded system, and then is transmitted to client.There are many limitation in actual applications in this video gateway that is made of the separate unit transcoding server, at first, real its transcoding ability of transcoding server is limited, can only handle 2～3 tunnel real-time code stream with the general separate unit server of existing level of hardware, so can't provide abundanter code stream selection for the user; Secondly, transcoding server itself is not only born the work of transcoding, also will be responsible for video flowing is sent to terminal client, and this has limited the service ability of system greatly.
It is simple in structure that summary of the invention the present invention is directed to present exemplary video gateway, a little less than the service ability of its application, supports the few shortcoming of user, proposed a kind of multichannel real-time video gateway and application process thereof of supporting large-capacity user.Video gateway favorable expandability of the present invention distributes flexibly; Can improve the availability and the stability of application service, guarantee service quality, and can eliminate user's and problem of the transcoder overload that may cause uneven the code stream demand.
A kind of multichannel real-time video gateway of supporting large-capacity user that the present invention proposes, it is characterized in that, comprise a reception server that receives source code flow, the N platform carries out Play Server and dispatch server that receives user's order request of order request of transcoding server, the M platform response user of code stream conversion; Wherein, N, M are the integer greater than 1; The input of each transcoding server in the said N platform transcoding server all links to each other with said reception server output, the output of each transcoding server all links to each other with the input of each Play Server in the said M platform Play Server, and said each Play Server all links to each other with a said dispatch server.
Operation principle of the present invention; Source code flow enters video gateway by reception server, reception server is passed to many transcoding servers with the code stream of receiving, code stream after every transcoding server will be changed is distributed to every Play Server, Play Server passes through dispatch server according to user's demand again, selects suitable code stream to be handed down to the terminal use.
The present invention proposes a kind of application process of the real-time video gateway of transmitting based on multichannel, it is characterized in that, comprise: form the real-time video gateway that multichannel is transmitted by a reception server, N platform transcoding server, M platform Play Server and a scheduler, wherein: said M platform Play Server and a foreground scheduler are formed the broadcast service cluster; Said reception server is positioned at the porch of gateway, is responsible for receiving source code flow; Immediately following thereafter be N platform transcoding server, be responsible for the conversion of code stream; The back of said transcoding server is a M platform Play Server, is responsible for response user's order request; Video gateway then is a scheduler to the interface of user side, and it is responsible for receiving user's order request, according to the load and the distribution situation of Play Server the order request that receives is distributed to Play Server; Specifically may further comprise the steps:
1) in advance the transcoding task of the N platform transcoding server in the gateway is done configuration, specify the output code flow type of every transcoding server, code stream size, and the way of code stream; The transcoding task of N platform transcoding server is done configuration, specifies the output code flow type of every transcoding server, code stream size, and the way of code stream;
2) reception server receives the video code flow that needs transcoding;
3) reception server is according to transcoding server tabulation in the video gateway that is provided with in advance, and the source code flow former state of receiving is transmitted in the N platform transcoding server each;
4) by the server list of query scheduling device, the code stream that will change separately is distributed to the broadcast service cluster on backstage to transcoding server respectively again;
5) scheduler of broadcast service cluster is responsible for receiving user's service request, after receiving user's service request at first according to the routing iinformation of region route, find a nearest Play Server from the user, if this server does not also transship, just respond user's service request by it, otherwise, scheduler continues search, look for distance time near server, if server does not have overload just to respond this user's request, by that analogy, till finding available server or having traveled through Servers-all;
6) after Play Server is received user's service request, hold consultation according to user's request type and current network conditions and user, thereby select suitable video/audio code stream to be handed down to terminal client (need not to pass through again scheduler this moment).
Advantage of the present invention:
1. transcoding work is placed on respectively on the different multiple servers with broadcast work and carries out, guaranteed service quality, also improved the availability and the stability of system simultaneously.
2. favorable expandability can be added new transcoding server and Play Server according to the service needs.
3. distribute flexibly, the distribution of Play Server is not subjected to the restriction of the region and the network segment, can lay nearby according to the active service needs.
4. the complete unification of COS, every Play Server can provide the code stream of all kinds and size, have eliminated user's and problem of the transcoder overload that may cause uneven to the code stream demand.
Description of drawings
The existing exemplary video gateway service of Fig. 1 system schematic.
Fig. 2 video gateway of the present invention and service system schematic diagram thereof.
A kind of real-time video net and using method embodiment thereof that transmits based on multichannel that embodiment the present invention proposes is described with reference to the accompanying drawings as follows:
The multichannel real-time video gateway of present embodiment as shown in Figure 2, its configuration comprises: 1 of 1 of reception server, transcoding server 3 (being designated as T1, T2, T3 respectively), Play Server 4 (being designated as V1, V2, V3, V4 respectively), scheduler, the operating system of use is Linux Redhat8.0.Reception server adopts LSMP Receiver, and transcoding server adopts LSMP Transcoder Server, and Play Server adopts LSMP Media Server, and scheduler adopts LVS Director.
Adopt the multichannel real-time video gateway of present embodiment that certain program is carried out application process live on line, may further comprise the steps:
1. video acquisition server video/audio signal boil down to MPEG-2 form that collection in worksite is arrived, code stream size 1.5Mbps passes to the reception server (the transcoding server tabulation at reception server comprises T1, T2, three transcoding servers of T3) that is arranged in the ISP corporate HQ;
2. reception server is transmitted to T1, T2, three transcoding servers of T3 with the MPEG-2 code stream former state of receiving, these three transcoding servers are provided with as follows respectively: T1 output two-way MPEG-4 code stream, and size is respectively 600Kbps, 450Kbps; T2 output two-way MPEG-4 code stream, size is respectively 300Kbps, 150Kbps; T3 output two-way is code stream H.263, and size is respectively 220Kbps, 150Kbps;
3. every transcoding server obtains Play Server by the server list of query scheduling device address, the code stream that conversion is good is handed down to each Play Server (like this, every Play Server can provide the code stream of six kinds of different-formats or bandwidth, to adapt to dissimilar users' demand);
4. four Play Server V1, V2, V3, V4 lay respectively at Beijing, Shanghai, Shenzhen, Chengdu, and the maximum access customer number of every Play Server is 1000.The user watches live on line by the ADSL access from Nanjing, access bandwidth 512Kbps;
5. the user sends service request to the scheduler that is positioned at Beijing ISP general headquarters, scheduler is according to nearby principle, at first judge with request source address Play Server V2 nearest, that be positioned at Shanghai whether transship, if find that current access customer number is full, then check again and the request address distance time current load state of Play Server V3 near, that be positioned at Shenzhen, the current access customer number of V3 is 620, number of users less than, then scheduler is transmitted to V3 with this request, provides service by V3 for this user;
6.V3 after receiving service request, hold consultation, be that the MPEG-4 code stream of 450Kbps is handed down to the terminal use at last with size according to user's request type and bandwidth and user.
Claims (2)
1, a kind of multichannel real-time video gateway of supporting large-capacity user, it is characterized in that, comprise a reception server that receives source code flow, the N platform carries out Play Server and dispatch server that receives user's order request of order request of transcoding server, the M platform response user of code stream conversion; Wherein, N, M are the integer greater than 1; The input of each transcoding server in the said N platform transcoding server all links to each other with said reception server output, the output of each transcoding server all links to each other with the input of each Play Server in the said M platform Play Server, and said each Play Server all links to each other with a said dispatch server.
2, a kind of application process of the real-time video gateway of transmitting based on multichannel, it is characterized in that, comprise: form the real-time video gateway that multichannel is transmitted by a reception server, N platform transcoding server, M platform Play Server and a scheduler, wherein: said M platform Play Server and a foreground scheduler are formed the broadcast service cluster; Said reception server is positioned at the porch of gateway, is responsible for receiving source code flow; Immediately following thereafter be N platform transcoding server, be responsible for the conversion of code stream; The back of said transcoding server is a M platform Play Server, is responsible for response user's order request; Video gateway then is a scheduler to the interface of user side, and it is responsible for receiving user's order request, according to the load and the distribution situation of Play Server the order request that receives is distributed to Play Server; Specifically may further comprise the steps:
1) in advance the transcoding task of the N platform transcoding server in the gateway is done configuration, specify the output code flow type of every transcoding server, code stream size, and the way of code stream; The transcoding task of N platform transcoding server is done configuration, specifies the output code flow type of every transcoding server, code stream size, and the way of code stream;
2) reception server receives the video code flow that needs transcoding;
3) reception server is according to transcoding server tabulation in the video gateway that is provided with in advance, and the source code flow former state of receiving is transmitted in the N platform transcoding server each;
4) by the server list of query scheduling device, the code stream that will change separately is distributed to the broadcast service cluster on backstage to transcoding server respectively again;
5) scheduler of broadcast service cluster is responsible for receiving user's service request, after receiving user's service request at first according to the routing iinformation of region route, find a nearest Play Server from the user, if this server does not also transship, just respond user's service request by it, otherwise, scheduler continues search, look for distance time near server, if server does not have overload just to respond this user's request, by that analogy, till finding available server or having traveled through Servers-all;
6) after Play Server is received user's service request, hold consultation according to user's request type and current network conditions and user, thereby select suitable video/audio code stream to be handed down to terminal client.
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| CN 200310101662 CN1271834C (en) | 2003-10-24 | 2003-10-24 | Multipath real time video-frequency gateway for supporting large capacity user and its application method |
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| CN 200310101662 CN1271834C (en) | 2003-10-24 | 2003-10-24 | Multipath real time video-frequency gateway for supporting large capacity user and its application method |
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| CN100442849C (en) * | 2006-03-28 | 2008-12-10 | 中山大学 | Apparatus and method for making digital domestic network terminal capable of playing multiple-media format |
| CN100466761C (en) * | 2005-08-11 | 2009-03-04 | 华为技术有限公司 | Mobile switching centre built in video gateway and method for realizing multimedia interconnection |
| CN100502503C (en) * | 2006-03-31 | 2009-06-17 | 中山大学 | Code-transferring system and method for simultaneously realizing multiple code flow output |
| CN101834854A (en) * | 2010-04-06 | 2010-09-15 | 北京交通大学 | Video transmission system of mobile phone |
| CN1825822B (en) * | 2004-11-05 | 2011-05-11 | 阿瓦雅-特诺维斯有限及两合公司 | Method and system control for setting up an IP telephony connection |
| CN102202229A (en) * | 2011-05-18 | 2011-09-28 | 北京瀚景锦河科技有限公司 | Method and device for real-time video gateway |
| CN102938908A (en) * | 2012-10-30 | 2013-02-20 | 深圳市路友网络科技有限公司 | Network traffic optimization method for mobile equipment, device and equipment |
| CN101917606B (en) * | 2009-12-08 | 2013-02-20 | 新奥特（北京）视频技术有限公司 | Control method and device for transcoding system |
| CN101917391B (en) * | 2009-12-17 | 2013-03-06 | 新奥特（北京）视频技术有限公司 | Method for playing network video and system for playing network video |
| CN103152613A (en) * | 2011-12-06 | 2013-06-12 | 上海文广互动电视有限公司 | Distributed code conversion task scheduling system and method based on video image group segmentation |
| CN103647984A (en) * | 2013-11-14 | 2014-03-19 | 天脉聚源(北京)传媒科技有限公司 | Load distribution method and system for video processing servers |
| WO2015096108A1 (en) * | 2013-12-26 | 2015-07-02 | 华为技术有限公司 | Network video issuing method, device and system |
| CN104935955A (en) * | 2015-05-29 | 2015-09-23 | 腾讯科技（北京）有限公司 | Live video stream transmission method, device and system |
| CN106899858A (en) * | 2017-02-14 | 2017-06-27 | 北京时间股份有限公司 | Video transcoding method, server and system |
| CN106973306A (en) * | 2017-02-14 | 2017-07-21 | 北京时间股份有限公司 | Distributed trans-coding method, apparatus and system |
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| CN104349178B (en) * | 2014-11-21 | 2018-02-09 | 赛特斯信息科技股份有限公司 | Realize real-time transcoding and the system and method for self-adaption code rate streaming media playing on demand |
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| CN1825822B (en) * | 2004-11-05 | 2011-05-11 | 阿瓦雅-特诺维斯有限及两合公司 | Method and system control for setting up an IP telephony connection |
| CN100466761C (en) * | 2005-08-11 | 2009-03-04 | 华为技术有限公司 | Mobile switching centre built in video gateway and method for realizing multimedia interconnection |
| CN100442849C (en) * | 2006-03-28 | 2008-12-10 | 中山大学 | Apparatus and method for making digital domestic network terminal capable of playing multiple-media format |
| CN100502503C (en) * | 2006-03-31 | 2009-06-17 | 中山大学 | Code-transferring system and method for simultaneously realizing multiple code flow output |
| CN101917606B (en) * | 2009-12-08 | 2013-02-20 | 新奥特（北京）视频技术有限公司 | Control method and device for transcoding system |
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| CN102202229A (en) * | 2011-05-18 | 2011-09-28 | 北京瀚景锦河科技有限公司 | Method and device for real-time video gateway |
| CN102202229B (en) * | 2011-05-18 | 2014-02-19 | 北京瀚景锦河科技有限公司 | Method and device for real-time video gateway |
| CN103152613A (en) * | 2011-12-06 | 2013-06-12 | 上海文广互动电视有限公司 | Distributed code conversion task scheduling system and method based on video image group segmentation |
| CN102938908A (en) * | 2012-10-30 | 2013-02-20 | 深圳市路友网络科技有限公司 | Network traffic optimization method for mobile equipment, device and equipment |
| CN103647984A (en) * | 2013-11-14 | 2014-03-19 | 天脉聚源(北京)传媒科技有限公司 | Load distribution method and system for video processing servers |
| WO2015096108A1 (en) * | 2013-12-26 | 2015-07-02 | 华为技术有限公司 | Network video issuing method, device and system |
| CN104935955A (en) * | 2015-05-29 | 2015-09-23 | 腾讯科技（北京）有限公司 | Live video stream transmission method, device and system |
| CN104935955B (en) * | 2015-05-29 | 2019-01-25 | 腾讯科技（北京）有限公司 | A kind of methods, devices and systems transmitting live video stream |
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| CN106899858A (en) * | 2017-02-14 | 2017-06-27 | 北京时间股份有限公司 | Video transcoding method, server and system |
| CN106973306A (en) * | 2017-02-14 | 2017-07-21 | 北京时间股份有限公司 | Distributed trans-coding method, apparatus and system |
| CN112995674A (en) * | 2021-05-20 | 2021-06-18 | 武汉中科通达高新技术股份有限公司 | Media information transmission method, system and storage medium |
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