CN1881925A - Method and structure for realizing live channel switching in Internet protocol audio-video broadcast network - Google Patents
Method and structure for realizing live channel switching in Internet protocol audio-video broadcast network Download PDFInfo
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- CN1881925A CN1881925A CNA2006100264170A CN200610026417A CN1881925A CN 1881925 A CN1881925 A CN 1881925A CN A2006100264170 A CNA2006100264170 A CN A2006100264170A CN 200610026417 A CN200610026417 A CN 200610026417A CN 1881925 A CN1881925 A CN 1881925A
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Abstract
The invention relates to a method for realizing live program switch in the internet protocol voice video broadcast order network, wherein said method comprises a live server, a carrier network device, a live processing server, and a top-up box. With said invention, the switch time of present live program can be reduced from 2s to 1s, to improve the television experience of IPTV user. The invention adds the live processing server, based on former technique, without changing the network distribution and system structure, with simple method.
Description
Technical field
The present invention relates to realize a kind of in IP broadband environment lower network TV (hereinafter to be referred as IPTV) network direct broadcast band fast switching method and system configuration, more particularly, be a kind of method and system structure based on key-frame extraction technology and set-top box buffer memory control strategy.
Background technology
IP broadband environment lower network television services is to cater to the user to the professional growing demand of home entertaining, the broadband new business that occurs along with the development of technology such as broadband network, encoding and decoding, flow transmission.As one of basic service in this new business, visual broadcast service with traditional broadcast television content high efficient coding after, be transferred to user terminal by IP network.
Channel suitable customer requirements switching time of current cable, be controlled in 1 second, therefore, in the audio-video-frequency broadcast business, if channel is oversize switching time, the user just has tangible wait sense when using business, produces and is sick of, thereby the business of influence is carried out, and therefore improving audio-video-frequency broadcast channel switch speed just seems extremely important.
So-called channel switches and is meant the user when watching programme televised live, adds/subtracts "+/-" key or numerical key from pressing channel and be presented at duration on the video screen to the image of corresponding channel program.At present based on the IPTV of multicasting technology live in, general channel handoff technique is based on that the IGMP agreement finishes.When the channel switching is done in operation, set-top box at first sends IGMP Leave Group request to the direct broadcast server that adopts multicasting technology and leaves current multicast group, cut off current live TV stream, send IGMP Join request to direct broadcast server then and add another multicast group, receive new multicast data flow data and decoding and display image, finish channel and switch.As everyone knows, channel is subjected to the network equipment to a plurality of factor affecting such as multicast packets processing delay, direct broadcast server response time, set-top-box chip processing speeds switching time.
As can be seen, each step of the professional mid band handoff technique of existing IPTV is serial operation, and after cutting off current live data streams, before the new live data streams of demonstration, the user must be through the stand-by period of one period " blank screen ".Because existing IPTV live broadcast service based on multicasting technology generally surpasses 2 seconds during this period of time, therefore, the user can produce tangible wait sensation.If run into network congestion again, then the time may be longer.
Summary of the invention
The object of the present invention is to provide a kind of direct broadcast band fast switching method and system configuration of in IP broadband environment lower network TV (hereinafter to be referred as IPTV) network, realizing, make under audio frequency and video live broadcast service environment, realize that in conjunction with key-frame extraction technology and set-top box buffer memory control strategy direct broadcast band switches fast based on multicasting technology.
Technical scheme of the present invention is as follows:
According to a kind of system configuration that direct broadcast band switches fast that in the IPTV network, realizes of the present invention, comprise direct broadcast server that is arranged on the IPTV network edge and the set-top box that connects with the simulated television assembly, this direct broadcast server becomes live connection through bearer network equipment connection programme televised live source and with set-top box, characteristics are: also at the IPTV network edge live processing server is set, it receives and the video requency frame data in short-term of all direct broadcast bands that the buffer memory direct broadcast server is exported flows, and carries out key frame and deposit buffering area A and temporary storage buffer region B; This live processing server and set-top box connect with the communication of IGMP agreement.
More specifically, the video data stream in short-term of said direct broadcast band is meant the video data stream in the 2 second time that key frame extracted of direct broadcast band.Said key frame is meant can represent the frame of video of video frequency band main contents in short-term.
According to same technical conceive, a kind of direct broadcast band fast switching method that in the IPTV network, realizes of the present invention, comprise step: S1, user use channel selecting key to carry out the channel switching; S2, set-top box receive the user channel handoff request by infrared interface; S3, set-top box are left current multicast group to the direct broadcast server request, and after the direct broadcast server response, set-top box is just cut off current live TV stream data; S4, set-top box be to the content-data of the corresponding channel of live processing server request, and live processing server response request is carried the key frame data in short-term of corresponding channel to set-top box; S5, set-top box are opened up two data buffering areas, receive the key frame data in short-term of corresponding channel, deposit buffering area A in, and play; S6, set-top box add the new multicast group of corresponding channel to the direct broadcast server request, and after the direct broadcast server response, set-top box receives the live TV stream data of corresponding channel; S7, set-top box receive the live TV stream data of corresponding channel, deposit buffering area B in; S8, set-top box switch to the data of play buffer B from the data of play buffer A, realize the switching of channel;
More specifically, the channel selecting key described in the step S1 comprises and adds/subtract "+/-" key or numerical key or combination of numbers key; Key frame data in short-term described in the step S4 is meant the data flow in corresponding 2 seconds of the extraction of direct broadcast band key frame;
Communication between described set-top box and live processing server and the direct broadcast server is pressed the IGMP agreement and is connect.
Advantage of the present invention is: utilize the present invention to carry out direct broadcast band and switch, can make present direct broadcast band switching time from dropping to 1 second greater than 2 seconds, improve IPTV user's television experience greatly.Though, use technical scheme of the present invention, need set up live processing server, to network design, system configuration can not produce essence and change, and realizes simple.
Description of drawings
Fig. 1 is that the present invention realizes the system architecture diagram that direct broadcast band switches fast in the IPTV network;
Fig. 2 is that the present invention realizes the flow chart that direct broadcast band switches fast in the IPTV network.
Embodiment
Provide better embodiment of the present invention according to Fig. 1 and Fig. 2 below, and described in detail, enable technical characterictic of the present invention and function characteristics are described better, rather than be used for limiting scope of the present invention.
See also Fig. 1, as shown in the figure, the structure that the direct broadcast band of existing IPTV live broadcast service based on multicasting technology switches comprises the direct broadcast server 20 that is arranged on network edge and the set-top box 30 that connects mutually with simulated television, direct broadcast server 20 connects programme televised live source 1 through bearer network equipment 2, channel switches to be finished based on the IGMP agreement, at first send IGMPLeave Group by set-top box 30 to direct broadcast server 20, current multicast group is left in request, cut off current multicast group data stream, send IGMP join to direct broadcast server 20 then, request adds another multicast group, receives new multicast group data stream and decoding and display image, finishes channel and switches.As improvement, in the present invention, set up live processing server 21 at network edge, it receives the live data of direct broadcast server 20, and with all direct broadcast band short time data streams of first-in first-out buffer memory; And on set-top box 30 address and live processing server 21 addresses of pre-configured direct broadcast server 20, and key frame data temporary storage buffer region A and buffering area B in short-term.The user adds corresponding multicast group, and receiving group group flow data is watched programme televised live.
See also Fig. 2, the user controls remote controller and carries out the direct broadcast band switching, and treatment step is as follows:
S1, user add/subtract "+/-" key or numerical key by channel, carry out channel and switch;
S2, set-top box 30 be by infrared mouthful of receiving channels handoff request, channel-identification number;
S3, set-top box are left current multicast group to the direct broadcast server request, the direct broadcast server response, and set-top box is cut off current live TV stream data;
S4, set-top box are to the content-data of the corresponding channel of live processing server 21 requests, and live processing server 21 is response request just, carries the key frame data in short-term of corresponding channel to set-top box 30;
S5, set-top box 30 are opened up two data buffering area A, B, receive the key frame data in short-term of corresponding channel, deposit buffering area A in, and play;
S6, set-top box 30 add the new multicast group of corresponding channel to direct broadcast server 20 requests, direct broadcast server 20 responses, and set-top box 30 receives the live TV stream data of corresponding channel;
S7, set-top box 30 receive the live TV stream data of corresponding channel, deposit buffering area B in;
S8, set-top box 30 switch to the data of play buffer B from the data of play buffer A, realize the switching of channel.
Claims (6)
1. in the IPTV network, realize the system configuration that direct broadcast band switches fast for one kind, comprise direct broadcast server that is arranged on the IPTV network edge and the set-top box that connects with the simulated television assembly, this direct broadcast server connects the programme televised live source through bearer network equipment, and then adopt multicasting technology to finish live connection between the set-top box, it is characterized in that, also at the IPTV network edge live processing server is set, it receives the also video data stream in short-term of all direct broadcast bands of buffer memory direct broadcast server output; And also pre-configured direct broadcast server address and live processing server address in this set-top box, and key frame data temporary storage buffer region A and temporary storage buffer region B in short-term are set; This live processing server and set-top box connect with the IGMP agreement.
2. the direct broadcast band of realizing in the IPTV network according to claim 1 switches and system configuration fast, it is characterized in that, the video data stream in short-term of described direct broadcast band is meant the video data stream in key frame extracted during 2 seconds to direct broadcast band.
3. in the IPTV network, realize the direct broadcast band fast switching method for one kind, comprise step:
S1, user use channel selecting key to carry out the channel switching;
S2, set-top box receive the user channel handoff request by infrared interface;
S3, set-top box are left current multicast group to the direct broadcast server request, and after the direct broadcast server response, set-top box is cut off current live TV stream data;
S4, set-top box be to the content-data of the corresponding channel of live processing server request, and live processing server response request pushes the key frame data in short-term of corresponding channel to set-top box;
S5, set-top box are opened up two data buffering area A, B, receive the key frame data in short-term of corresponding channel, deposit buffering area A in, and play;
S6, set-top box add the new multicast group of corresponding channel to the direct broadcast server request, the direct broadcast server response, and set-top box receives the live TV stream data of corresponding channel;
S7, set-top box receive the live TV stream data of corresponding channel, deposit buffering area B in;
S8, set-top box switch to the data of play buffer B from the data of play buffer A, realize the switching of channel.
4. the direct broadcast band fast switching method that realizes in the IPTV network according to claim 3 is characterized in that, the channel selecting key described in the step S1 comprises and adding/subtract "+/-" key or numerical key or combination of numbers key.
5. the direct broadcast band fast switching method that realizes in the IPTV network according to claim 3 is characterized in that, the key frame data in short-term described in the step S4 is meant extracts interior data flow during 2 seconds to the direct broadcast band key frame.
6. the direct broadcast band fast switch over method of realizing in the IPTV network according to claim 3 is characterized in that the communication between described set-top box and live processing server and the direct broadcast server is pressed the IGMP agreement and connect.
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| CNB2006100264170A CN100429901C (en) | 2006-05-10 | 2006-05-10 | Method and structure for realizing live channel switching in Internet protocol audio-video broadcast network |
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| CNB2006100264170A CN100429901C (en) | 2006-05-10 | 2006-05-10 | Method and structure for realizing live channel switching in Internet protocol audio-video broadcast network |
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| CN1881925A true CN1881925A (en) | 2006-12-20 |
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| WO2008122222A1 (en) * | 2007-04-06 | 2008-10-16 | Huawei Technologies Co., Ltd. | Method, equipment and system for realizing video live broadcast |
| WO2009039741A1 (en) * | 2007-09-25 | 2009-04-02 | Huawei Technologies Co., Ltd. | A method and device for realizing the switching of iptv channels |
| WO2009089755A1 (en) * | 2007-12-28 | 2009-07-23 | Huawei Technologies Co., Ltd. | Method and device for improving user experience of internet protocol television |
| CN101212328B (en) * | 2006-12-27 | 2010-05-19 | 中兴通讯股份有限公司 | Quick start system and method for multicast channels |
| WO2010054543A1 (en) * | 2008-11-17 | 2010-05-20 | 华为技术有限公司 | Method, device and system for channel switching |
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| WO2008110122A1 (en) * | 2007-03-15 | 2008-09-18 | Huawei Technologies Co., Ltd. | A method, system and buffer entity for switching network tv channels |
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| CN101990112B (en) * | 2009-08-07 | 2015-01-07 | 传线网络科技（上海）有限公司 | Internet request signal dynamic switching method |
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| CN104093070A (en) * | 2014-07-22 | 2014-10-08 | 中国科学院软件研究所 | Channel switching accelerating method and channel ethnic group marking method in video multicast network system |
| CN104093070B (en) * | 2014-07-22 | 2017-05-10 | 中国科学院软件研究所 | Channel switching accelerating method and channel ethnic group marking method in video multicast network system |
| CN105100888A (en) * | 2015-07-17 | 2015-11-25 | 上海斐讯数据通信技术有限公司 | OLT-device-based IPTV channel switching acceleration method |
| CN105657534A (en) * | 2016-01-07 | 2016-06-08 | 烽火通信科技股份有限公司 | Android based internet protocol television play switch system and method |
| CN106792120A (en) * | 2017-02-07 | 2017-05-31 | 青岛海信电器股份有限公司 | The display methods of video pictures, device and terminal |
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