CN101610394A - IPTV system, digital television receiver and television channel switching method - Google Patents
IPTV system, digital television receiver and television channel switching method Download PDFInfo
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- CN101610394A CN101610394A CNA2009101087730A CN200910108773A CN101610394A CN 101610394 A CN101610394 A CN 101610394A CN A2009101087730 A CNA2009101087730 A CN A2009101087730A CN 200910108773 A CN200910108773 A CN 200910108773A CN 101610394 A CN101610394 A CN 101610394A
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Abstract
The present invention discloses a kind of IPTV system, digital television receiver and television channel switching method.Wherein, this method comprises: when the client of access IPTV system is received channel switching instruction, start the VOD module and send program data request to the VOD server, provide this program can play first program data stream of scheduled duration by the VOD server to client; Client is obtained first program data stream and is carried out playback process, and starts the P2P service request that this program data is obtained in the P2P server transmission of P2P module in the IPTV system; Client can provide the media data streaming server of this program data or second program data stream of this program of client downloads that other watch this program from one of them, selects to carry out playback process since the continue position of first program data stream of second program data stream.The present invention has shortened the stand-by period after the user channel switching, for the user provides the more digital television service of high-quality.
Description
Technical field
The present invention relates to the media data flow transmission technology, especially relate to a kind of employing video request program (VOD) and point-to-point transmission (P2P) and combine and realize that the media data flow transmission realizes the method that the Digital Television fast channel switches, and adopt the IPTV system of this method and insert the digital television receiver of IPTV system.
Background technology
Present IPTV set-top box and similar products can be realized TV reception and other video frequency programs by IP network.The stream medium data ways of distribution generally has two kinds: first video request program (Video On Demand, VOD), another kind be point-to-point transmission (Peer-to-Peer, P2P).
VOD is based on the C/S framework, and media data is stored in one or more central servers, and client is directly obtained data and play in this locality from server.If customer volume is very huge, server end also needs very big outlet bandwidth, has improved operating cost of operator; And because the point of server is less, if shake or unusual appears in network, transfer of data can be a greater impact.
And P2P is called the equity networking.The P2P technology is adopted in now a lot of internet video live broadcasting program request operations commercial city, and the stable data transmission can be provided, and can reduce the outlet bandwidth of server again greatly, cuts operating costs.But because P2P system relative complex and Signalling exchange repeatedly, and multiple spot connection and transfer of data, the user often needs the long data buffering time when switching program.
Common P2P client channel switches on the network generally needs the buffering 10-20 time of second, and but this is unacceptable for the user who uses IPTV be accustomed to common TV channel switch speed.Therefore, be necessary to develop a kind of IPTV system of can fast channel switching.
Summary of the invention
The present invention proposes a kind of IPTV system of can fast channel switching, inserts the digital television receiver that the IPTV system realizes that fast channel switches, and in the IPTV system, realize Digital Television fast channel changing method, adopt video request program (VOD) and point-to-point transmission (P2P) to combine and realize that the media data flow transmission realizes that the Digital Television fast channel switches.
The present invention adopts following technical scheme to realize: a kind of television channel switching method, and it comprises:
When the client of access IPTV system is received the channel switching instruction that switches to a target channel, client obtain and playback process to first program data stream that should target channel, and send the P2P service request of obtaining this program data to the P2P server, the P2P server returns the Peer tabulation;
From the Peer tabulation, select one of them media data streaming server or other to watch second program data stream of this target channel of client downloads of this target channel by client, select second program data stream to be carried out playback process from the position of first program data stream that continues.
Wherein, described first program data stream and second program data stream are formed by the data block that adopts serial number, and client can find the continue position of first program data stream of second program data stream by the judgment data block number.
Wherein, if first program data stream and second program data stream have the data block that a plurality of numberings repeat, then to select the data block of one of them numbering repetition be that original position switches to playback process second program data stream to client.
Wherein, described television channel switching method also comprises: send the program data request of obtaining corresponding target channel by the VOD server of client in the IPTV system, provide first program data stream by the VOD server to this client.
Wherein, first program data stream can be play scheduled duration, and this scheduled duration needs buffer time of downloading second program data stream according to the Peer tabulation greater than client.
In addition, the present invention also discloses a kind of IPTV system, and it comprises: plurality of media data flow server provides the VOD server of VOD function service and the P2P server of P2P function service is provided, and inserts several clients;
When client is received the channel switching instruction that switches to a target channel, send the program data request of corresponding target channel to the VOD server, the VOD server provides first program data stream according to program data request to client;
Client terminal playing is handled first program data stream, and sends the P2P service request of obtaining this program data to the P2P server, and the P2P server returns the Peer tabulation;
From the Peer tabulation, select one of them media data streaming server or other to watch second program data stream of this target channel of client downloads of this target channel by client, select second program data stream to be carried out playback process from the position of first program data stream that continues.
Moreover the present invention also discloses a kind of digital television receiver, and it comprises: controller; Insert the network interface of IPTV system; Demodulator; Decoder; Audio and video output interface; And VOD module, be used for after receiving channel switching instruction, VOD server in the IPTV system sends the program data request of obtaining corresponding target channel, and obtains first program data stream that can play scheduled duration from the VOD server by network interface; By controller control decoder and audio and video output interface first program data stream is carried out playback process; The P2P module, be used for sending the P2P service request of obtaining corresponding target channel program data to the P2P of IPTV system server, receive the P2P server and return the Peer tabulation, and select one of them media data streaming server or other to watch second program data stream of this target channel of client downloads of this program from the Peer tabulation; Controller is selected since the continue position of first program data stream of second program data stream, and control decoder and audio and video output interface are carried out playback process to second program data stream.
Compared with prior art, the present invention has following beneficial effect:
The bright elder generation of this law provides 10-20 the program data of playing duration second by the VOD server, so that P2P program downloading data can have enough buffer time, is downloaded by P2P and realizes digital television service at a high speed.Therefore, the present invention organically combines P2P and VOD, combine the strong point that VOD downloads and P2P downloads, for the user provides the more digital television service of high-quality, shortened the stand-by period after user channel switches, guaranteed to have realized under the prerequisite that TV programme is play continuously that the Digital Television fast channel switches.
Description of drawings
Fig. 1 is the topological structure schematic diagram of IPTV of the present invention system;
Fig. 2 is the structural representation of digital television receiver of the present invention;
Fig. 3 is that the present invention realizes the schematic flow sheet that fast channel switches in the IPTV system.
Embodiment
As shown in Figure 1, the IPTV system that the present invention proposes is on the basis of existing IPTV system, increase by one or the one group VOD server 2 that the service of video request program (VOD) function is provided, and form and be used to provide the P2P server 3 of P2P function service by P2P Tracker server 31 and P2P data server 32, this P2P server 3 also can be one or one group.
The IPTV system is inserted in several customer sides, and the user can obtain the digital television service that the IPTV system provides by client.
And P2P Tracker server 31 is information centres of P2P server 3, preserves all programme informations, the tabulation of data server and client.P2P data server 32 is data centers of P2P server 3, preserves all program media data.
In present IPTV system, the general realization to 1, one digital television receiver of digital television receiver 1 inserts the IPTV system of client is a client.In conjunction with shown in Figure 2, digital television receiver 1 comprises: controller 11; Demodulator 12; Decoder 13; Audio and video output interface 14; Be used for obtaining the VOD module 15 of video-on-demand service from the VOD of IPTV system server 2; Be used for obtaining the P2P module 16 and the network interface 17 that is used to insert the IPTV system of P2P service from the P2P of IPTV system server 3.
In conjunction with shown in Figure 3, when a user who inserts the digital television receiver 1 of IPTV system selected a TV programme to begin to watch, its processing procedure was as follows:
Step S1: controller 11 controls by digital television receiver 1 start VOD module 15.
Step S2:VOD module 15 is sent program data request message by network interface 17 to the VOD of IPTV system server 2, and this request message can should comprise the IP address or the information such as machine code, TV programme code and request time of digital television receiver 1 at least.
After the request message of step S3:VOD server 2 receiving digital television receivers 1, the TV programme of correspondence is sent to by network interface 17 from first program data stream that this request time begins to play predetermined amount of time, digital television receiver 1 is decoded by 13 pairs first program data streams of decoder, plays from the audio signal and the vision signal of audio and video output interface 14 output TV programme.
Because the VOD system is based on the C/S framework, digital television receiver 1 is relative simple with interaction flow between the VOD server 2, under the assurance of the network bandwidth, can in a short period of time media data flow be transferred to client and offer player plays.ADSL with the 2Mbps bandwidth is an example, the code check of supposing video frequency program is 500kbps, then digital television receiver 1 can be downloaded from VOD server 2 and can supply broadcast 10 seconds even the video data of longer time in 3 seconds, also be that the user selects a program to begin to play, can finish the buffering of data in 3 seconds and begin and play.
Step S4: controller 11 controls by digital television receiver 1 start P2P module 16.
Step S5:P2P module 16 is sent the debarkation authentication request by network interface 17 to the P2P of IPTV system Tracker server 31.
Step S6:P2P Tracker server 31 returns debarkation authentication success or failure.
Step S7: by after the debarkation authentication of P2P Tracker server 31, continue to send the P2P server 3 that is used to obtain the P2P service that this TV programme is provided to P2P Tracker server 31 and watch the solicited message of the client address (Peers) of same program with other by network interface 17 in P2P module 16.
Step S8:P2P Tracker server 31 returns the relevant information and the Peer tabulation of request TV programme, and this Peer tabulation has shown the list information of the relevant P2P data server that the P2P service can be provided and the list information information of watching other clients of this TV programme.
Step S9:P2P module 16 is selected one of them media data streaming server or is watched second program data stream of this TV programme of client downloads of same program from other from the Peer tabulation according to P2P Tracker server 31 return informations.Simultaneously, second program data stream of this TV programme that also digital television receiver 1 can be obtained of P2P module 16 is uploaded to share and is given other digital television receivers that insert the IPTV system.
In addition, second program data stream of P2P module 16 downloads must will guarantee continuity with first program data stream of VOD module download before.In view of the media data flow of net cast (VOD) and P2P program request generally is transmission of data blocks and storage by serial number, so data block numbering information of first program data stream that digital television receiver 1 record obtains from VOD server 2 in step S3, such as, receive first data block (data block) and be numbered i, and last data block (tail data block) numbering that can play the first program data stream correspondence of predetermined amount of time should be i+m (m for greater than 1 integer); When digital television receiver 1 begins to download second program data stream by P2P module 16, first numbering that needs only the second program data stream corresponding data piece of downloading by P2P module 16 is less than or equal to i+m, then 1 pair of digital television receiver carries out reading the data block that is numbered i+m+1 and next number from second program data stream that P2P module 16 is downloaded TV programme being carried out continuous playback process after the playback process from VOD server 2 and the data block that is numbered i+m; Certainly, for the data block that first, second program data stream repeats, digital television receiver 1 also can optionally switch to from one of them repeating data BOB(beginning of block) second program data stream is carried out playback process, thereby realizes continuous playback process.
Certainly, if flow first numbering of corresponding data piece greater than i+m by P2P module 16 data download, illustrate that then buffer time that P2P module 16 data download need provides the reproduction time of first program data stream greater than VOD server 2, then need to adjust the setting of VOD server 2, make it first program data stream of longer reproduction time is provided for digital television receiver 1.
To sum up, this law is bright by P2P and VOD are organically combined, for the user provides the more digital television service of high-quality, shortened the stand-by period after user channel switches, guaranteeing to have realized under the prerequisite that TV programme is play continuously that the Digital Television fast channel switches.
Claims (10)
1, a kind of television channel switching method is characterized in that, comprising:
When the client of access IPTV system is received the channel switching instruction that switches to a target channel, client obtain and playback process to first program data stream that should target channel, and send the P2P service request of obtaining this program data to the P2P server, the P2P server returns the Peer tabulation;
From the Peer tabulation, select one of them media data streaming server or other to watch second program data stream of this target channel of client downloads of this target channel by client, select second program data stream to be carried out playback process from the position of first program data stream that continues.
2, according to the described television channel switching method of claim 1, it is characterized in that, described first program data stream and second program data stream are formed by the data block that adopts serial number, and client can find the continue position of first program data stream of second program data stream by the judgment data block number.
3, according to the described television channel switching method of claim 2, it is characterized in that, if first program data stream and second program data stream have the data block that a plurality of numberings repeat, then to select the data block of one of them numbering repetition be that original position switches to playback process second program data stream to client.
4, according to the described television channel switching method of claim 1, it is characterized in that, also comprise: send the program data request of obtaining corresponding target channel by the VOD server of client in the IPTV system, provide first program data stream to this client by the VOD server.
According to the described television channel switching method of claim 1, it is characterized in that 5, first program data stream can be play scheduled duration, and this scheduled duration needs buffer time of downloading second program data stream according to the Peer tabulation greater than client.
6, a kind of IPTV system, it comprises plurality of media data flow server, it is characterized in that, also comprises: the VOD server of VOD function service is provided and the P2P server of P2P function service is provided, and insert several clients;
When client is received the channel switching instruction that switches to a target channel, send the program data request of corresponding target channel to the VOD server, the VOD server provides first program data stream according to program data request to client;
Client terminal playing is handled first program data stream, and sends the P2P service request of obtaining this program data to the P2P server, and the P2P server returns the Peer tabulation;
From the Peer tabulation, select one of them media data streaming server or other to watch second program data stream of this target channel of client downloads of this target channel by client, select second program data stream to be carried out playback process from the position of first program data stream that continues.
7, according to the described IPTV of claim 6 system, it is characterized in that, described first program data stream and second program data stream are formed by the data block that adopts serial number, and client can find the continue position of first program data stream of second program data stream by the judgment data block number.
8, according to the described IPTV of claim 7 system, it is characterized in that, if first program data stream and second program data stream have the data block that a plurality of numberings repeat, then to select the data block of one of them numbering repetition be that original position switches to playback process second program data stream to client.
9, a kind of digital television receiver, it comprises: controller; Insert the network interface of IPTV system; Demodulator; Decoder; Audio and video output interface; It is characterized in that, also comprise:
The VOD module is used for after receiving channel switching instruction, and the VOD server in the IPTV system sends the program data request of obtaining corresponding target channel, and obtains first program data stream that can play scheduled duration from the VOD server by network interface;
By controller control decoder and audio and video output interface first program data stream is carried out playback process;
The P2P module, be used for sending the P2P service request of obtaining corresponding target channel program data to the P2P of IPTV system server, receive the P2P server and return the Peer tabulation, and select one of them media data streaming server or other to watch second program data stream of this target channel of client downloads of this program from the Peer tabulation;
Controller is selected since the continue position of first program data stream of second program data stream, and control decoder and audio and video output interface are carried out playback process to second program data stream.
10, according to the described digital television receiver of claim 9, it is characterized in that, described first program data stream and second program data stream are formed by the data block that adopts serial number, and client can find the continue position of first program data stream of second program data stream by the judgment data block number.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009101087730A CN101610394A (en) | 2009-07-17 | 2009-07-17 | IPTV system, digital television receiver and television channel switching method |
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| CNA2009101087730A CN101610394A (en) | 2009-07-17 | 2009-07-17 | IPTV system, digital television receiver and television channel switching method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123304A (en) * | 2009-12-28 | 2011-07-13 | 汤姆森许可贸易公司 | Method and device for reception of video contents and services broadcast with prior transmission of data |
| CN102396182A (en) * | 2010-12-24 | 2012-03-28 | 华为技术有限公司 | Fault-tolerance method, system, terminal node and network edge node for stream media transmission |
| CN103458286A (en) * | 2013-08-30 | 2013-12-18 | 小米科技有限责任公司 | Television channel switching method and device |
| CN103780925A (en) * | 2012-10-26 | 2014-05-07 | 深圳市快播科技有限公司 | On-line video-on-demand method and system based on moving platform |
| CN109348285A (en) * | 2018-11-30 | 2019-02-15 | 青岛海信传媒网络技术有限公司 | Channel switching method and device |
-
2009
- 2009-07-17 CN CNA2009101087730A patent/CN101610394A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123304A (en) * | 2009-12-28 | 2011-07-13 | 汤姆森许可贸易公司 | Method and device for reception of video contents and services broadcast with prior transmission of data |
| CN102123304B (en) * | 2009-12-28 | 2015-01-14 | 汤姆森许可贸易公司 | Method and device for reception of video contents and services broadcast with prior transmission of data |
| CN102396182A (en) * | 2010-12-24 | 2012-03-28 | 华为技术有限公司 | Fault-tolerance method, system, terminal node and network edge node for stream media transmission |
| CN102396182B (en) * | 2010-12-24 | 2014-06-04 | 华为技术有限公司 | Fault-tolerance method, system, terminal node and network edge node for stream media transmission |
| CN103780925A (en) * | 2012-10-26 | 2014-05-07 | 深圳市快播科技有限公司 | On-line video-on-demand method and system based on moving platform |
| CN103458286A (en) * | 2013-08-30 | 2013-12-18 | 小米科技有限责任公司 | Television channel switching method and device |
| CN109348285A (en) * | 2018-11-30 | 2019-02-15 | 青岛海信传媒网络技术有限公司 | Channel switching method and device |
| CN109348285B (en) * | 2018-11-30 | 2021-06-01 | 青岛海信传媒网络技术有限公司 | Channel switching method and device |
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Open date: 20091223 |