CN1960260A - Method for providing IPTV service for different type terminals, and IPTV service system - Google Patents
Method for providing IPTV service for different type terminals, and IPTV service system Download PDFInfo
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Abstract
The EPG server obtains linked message related to the terminal statistic attribute message from CMS the media document and generates the related link path according to the linked message. The terminal asks the media server for the corresponding media document according to the link path and obtains the corresponding media data. According to the attribute messages such as net access type, resolution and coding format supported by different terminals, this invention sends appropriate media data to support the match between different types of terminals. The document coding method is simple.
Description
Technical field
The present invention relates to the communications field, relate in particular to IPTV (IP Television, IP-based television services) technology is provided.
Background technology
IPTV is to be carrying with the IP technology, by manageable network, the interactive service of serving based on audio frequency and video and stream is provided to the user, it comprises basic businesses such as live telecast, video request program, time-moving television, and on this platform base, carry out comprise communication, data, video in interior triple play (triple play) business.
Continuous demand along with people, the IPTV business is from original single fixed network, fixed terminal, develop into mobile network and portable terminal, this requires each operator simultaneously when constructing IP TV business platform, can satisfy fixed network user and mobile subscriber's demand simultaneously, to reduce the cost of investment of repeated construction, therefore, the IPTV media delivery service is supported multiple terminal simultaneously, comprise PC (Personal Computer, personal computer), STB (STB:Set Top Box, set-top box), portable terminal etc., be the inexorable trend of business development.
Dissimilar terminal plays media datas mainly is subjected to three factor affecting: the coded format of network insertion type, resolution and support.The coded format of dissimilar terminal supports has nothing in common with each other, and therefore necessary coded format according to the terminal support sends media data.At present, formed the various video coding standard, comprise MPEG-2, MPEG-4, H.263, H.264, AVS, Miscrosoft Windows MediaVideo etc.
The prior art relevant with the present invention provides a kind of method that media business is provided for multiple terminal by the hierarchical coding mode, its main thought is: adopt fixing coded format, and media information is encoded by layer, form a multi-level media file, and leave on the media server.Described media server is according to the different requirements of client to code check and resolution, and the various combination that adopts different layers information is to the client terminal playing media data.
In the prior art, owing to adopt fixing coded format, and by layer media information is encoded, so flexibility is not high, does not support the adaptive of different coding form; And document No. more complicated.
Summary of the invention
It is a kind of for dissimilar terminals provides the method and the IPTV operation system of IPTV business that embodiments of the invention provide, and supporting the adaptive of different coding form, and document No. is fairly simple.
The present invention is achieved through the following technical solutions:
It is a kind of for dissimilar terminals provides the method for IPTV business that embodiments of the invention provide, and it comprises:
EPG (electronic program list) server obtains the link information of the media file corresponding with the static attribute information of terminal from CMS (Content Management System), and generates the link path of being correlated with according to described link information;
Terminal is according to the media file of described link path to media server request correspondence, and obtains corresponding media data.
It is a kind of for dissimilar terminals provides the method for IPTV business that embodiments of the invention also provide, and it comprises:
In the in progress process of media file, terminal periodic ground sends RTCP RR (Real-TimeControl Protocal, RTCP Real-time Transport Control Protocol) bag; Wherein carry loss rate and/or jitter rate information;
Media server is according to described loss rate and/or jitter rate information, determine current network service quality, select and the corresponding media file of terminal static attribute information according to current network service quality, and stop the media data of current transmission, the media data of the media file selected is transferred to described terminal.
Embodiments of the invention also provide a kind of IPTV operation system, and it comprises:
Terminal, EPG server, CMS and media server;
Described EPG server obtains the link information of the media file corresponding with the static attribute information of terminal from described CMS, and generates relevant link path according to described link information;
Described terminal is according to the media file of described link path to described media server request correspondence, and obtains corresponding media data.
Embodiments of the invention also provide a kind of media server, and it comprises:
The media file selected cell is used for the request according to different types of terminals, for described terminal is selected corresponding media file;
Data transmission unit is used for the media data of described media file is transferred to described terminal.
The specific embodiments that provides by the invention described above as can be seen, the electronic program EPG server obtains the link information of the media file corresponding with the static attribute information of terminal from CMS, and generates the link path of being correlated with according to described link information; Terminal is according to the media file of described link path to media server request correspondence, and obtain corresponding media data, therefore attribute informations such as the network insertion type that can support according to dissimilar terminals of the present invention, resolution, coded format send the media data that is fit to, thereby have realized supporting the adaptive of different types of terminals; And document No. is fairly simple.
Description of drawings
Fig. 1 is the flow chart of first embodiment provided by the invention;
Fig. 2 is the process chart behind user's switching terminal among first embodiment provided by the invention;
Fig. 3 is a process chart of adjusting transmission of media data among first embodiment provided by the invention according to the dynamic attribute of terminal;
Fig. 4 is the structure chart of second embodiment provided by the invention;
Fig. 5 is the structure chart of the 3rd embodiment provided by the invention.
Embodiment
First embodiment provided by the invention is a kind of method that the IPTV business is provided for dissimilar terminals.Before implementing first embodiment, need in media server, preserve a plurality of media files for each program, described media file is corresponding with the attribute information of described terminal.Also need be in CMS, preserved the metadata (comprising URL) etc. of a plurality of media files of each program correspondence.Also need each terminal to collect the various contextual informations of oneself, mainly comprise the terminal attributive informations such as coded format of terminal type, network insertion type, resolution, support in the described contextual information.Its flow process comprises following process as shown in Figure 1:
Step S101, when terminal needs media business, send HTTP (Hypetext Tranfer Protocal to EPG (Electric Program Guide, electronic program list) server, HTML (Hypertext Markup Language)) request message, the wherein contextual information of carried terminal collection.
The realization of step S101 need be expanded current http protocol, promptly adds " X-up-bearer-type ", " X-resolution " two new arguments among the Entity header in the HTTP request message (entity head)." X-up-bearer-type " parametric representation network insertion type wherein is used for determining the approximate range of terminal access bandwidth; The resolution of described " X-resolution " parametric representation terminal.
Step S102, after the EPG server receives described request message, resolve and obtain the attribute information of terminal according to the contextual information of terminal, as obtaining the current network insertion type of terminal by " X-up-bearer-type " in the request, thereby obtain the approximate range of the access bandwidth of terminal, determine the broadcast code check of a recommendation; Obtain the resolution of terminal by " X-resolution " in the request; Obtain the coded format that terminal is supported by " Accept " in the request.
Step S103, the EPG server sends to described CMS with the attribute information of described terminal.
Step S104, described CMS chooses the metadata of corresponding media file according to the attribute information of described terminal, and sends it to described EPG server.
Step S105, described EPG server generates the link path of media file according to described metadata, and described link path is transferred to described terminal.
Step S106, described terminal links corresponding media file in the described media server according to described link path, and obtains corresponding media data.
It is adaptive to realize that through above-mentioned first embodiment dissimilar terminals is carried out static state, makes it obtain the media data that the attribute information with terminal is complementary.But in the in progress process of media file, the situation that the user changes terminal type may appear, in this case, when sending media data, streaming media server should not begin to send but follow the last position of the key frame of transmission at last from the original position of program.
Switch in order to realize terminal smoothly, the media file that is stored on the media server is set up I frame (key frame) concordance list, this concordance list has two elementary field: File-offset and Time, represents position and the sampling time of this I frame in media file respectively.Other fields can be expanded as required voluntarily.The specific implementation process is as shown in Figure 2, and is as follows:
Step S201, in the in progress process of media file, if the user prepares to switch to new terminal from former terminal, then described media server is from just finding the I frame that is about to transmission playing media file, and according to each I frame and its corresponding relation of media file in the position of media file, between the sampling time, obtain the sampling time and the position of described I frame in media file of described I frame, and stop to send the later data in position that are positioned at described I frame in the media file.
Step S202, after the user switched to new terminal, described new terminal sent the HTTP request message to the EPG server.
Step S203, after the EPG server receives described request message, contextual information according to described new terminal is resolved terminal ability information, obtain the attribute information of described new terminal, the attribute informations such as coded format that network insertion type, terminal resolution and/or the terminal of supporting as new terminal supported, and the attribute information of described new terminal sent to described CMS.
Step S204, described CMS chooses the metadata of corresponding media file according to the attribute information of described new terminal, and gives described EPG server with described metadata transport.
Step S205, described EPG server is generated to the link path of media file according to described metadata, and described link path is transferred to described new terminal.
Step S206, described new terminal link the media file in the described media server according to described link path.
Step S207, described media server is according to each I frame and its corresponding relation in the position of media file, between the sampling time of media file, and the sampling time of the I frame of last transmission last time, obtain the position of described I frame in the media file of described new terminal request; And, in the media file of described new terminal request, find corresponding I frame according to described position, and send the data of described I frame correspondence, and the follow-up data of described I frame.
For example step S201 is described to the process between the step S207 below, as follows:
Suppose that the user closes original terminal when preparing to switch to new terminal, just at playing media file A, at this moment, media server finds and is about to the I frame that sends.According to the I frame index table of the position enquiring A of described I frame in media file, obtain the sampling time a of described I frame, and the position of described I frame in media file, and stop to send the later data in position that are positioned at described I frame in the media file.
The user gets access to the EPG link adaptive with described new terminal by new terminal, and by adaptive media file B in the described EPG link linked media server.
Described media server finds the adaptive media file B of new terminal, and searches the I frame index table of media file B, finds the sampling time to equal the position b of I frame in media file B of a.
In media file B, find corresponding I frame according to position b, send the packet and the follow-up data bag thereof of described I frame then.Thereby finish taking over seamlessly of different types of terminals.
Owing to the variation along with network environment of the attribute information of terminal changes, therefore also to consider to carry out adaptive dynamically according to the dynamic attribute of terminal.Embodiments of the invention adopt in service end and realize that according to the mode that the dynamic attribute of terminal carries out dynamic adaptation specific implementation comprises following process as shown in Figure 3:
Comprise field " fraction lost " and field " interarrival jitter " in the RTCP RR bag.The value representation loss rate of " fractionlost " field, loss rate=from playing the zero hour to the current maximum sequence number of the number of dropped packets ÷ of current time; The value representation jitter rate of " interarrival jitter " field, the jitter rate of jitter rate=previous bag+(| the actual time of arrival of stabbing poor-adjacent R TP bag between adjacent R TP bag is poor | the jitter rate of-previous bag) and ÷ 16.
Media server is determined the network QoS quality according to the loss rate and the jitter rate of RTCP RR bag, and adjusts the media data of current transmission according to described current network service quality.Specific as follows:
Step S302, media server is analyzed the loss rate and the jitter rate of RTCP RR bag, when finding that loss rate and/or jitter rate continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving first setting-up time, media server determines that current network service quality descends, then take code check dynamically to adjust strategy, stop the media data of current transmission, select to be fit to current network service quality and corresponding with terminal static attribute information low code check media file, to open the media data in the described media file is transferred to described terminal.
In step S302, in order to take code check dynamically to adjust strategy the media data of current transmission is adjusted, need to use the I frame index table of media file on the media server, can can't harm the code check adjustment according to described I frame index table with that, situation about descending with network quality is that example describes the process that can't harm the code check adjustment below, specifically describes as follows:
Media server is just at playing media file C, when network quality descends, media server finds the I frame that is about to transmission, obtain the sampling time a of described frame by the I frame index table of media file C, and the position of described I frame in media file C, and stop to send the later data in position that are positioned at described I frame in the media file;
According to the linking request of terminal, media server finds the low slightly other media file D of code check identical with media file C programme content but coding; Search the I frame index table of media file D, find the sampling time to equal the position d of I frame in media file D of a; Find corresponding I frame according to position d in media file D, media server sends the data and the follow-up data thereof of described I frame correspondence.
Find loss rate and/or jitter rate when media server and continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving second setting-up time, then media server determines that current network service quality descends, and it is tactful to take to flow thinization, according to stopping to send the audio frequency media data earlier, stop to send the predictive frame video media-data again, stop the order of key frame media data at last, adjust the media data of current transmission.Be implemented as follows:
Step S303, find loss rate and/or jitter rate when media server and continue to continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving second setting-up time, then media server determines that current network service quality descends, and it is tactful to take to flow thinization, stop to send the audio frequency media data earlier, send suitable current network service quality, and the predictive frame video media-data corresponding with terminal static attribute information.
Step S304, find loss rate and/or jitter rate when media server and continue to continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving second setting-up time, then media server determines that current network service quality descends, and it is tactful to take to flow thinization, stop to send the predictive frame video media-data, send suitable current network service quality, and the key frame media data corresponding with terminal static attribute information.
Step S305, when finding that loss rate and/or jitter rate continue to be the decline state, and the lasting time that surpasses setting threshold is when arriving first setting-up time, media server determines that current network service quality rises, and take code check dynamically to adjust strategy, stop to send the media data of current transmission, specify the high code check media file that is fit to current network service quality, and the media data in the described media file is transferred to described terminal.
The realization of step S305 need be used the I frame index table of media file on the media server equally, determine the sampling time of the last I frame correspondence that sends, and in new adaptive media file, find the position of the I frame of corresponding described sampling time correspondence according to the described sampling time, find corresponding I frame according to described position then, and send the packet of described I frame correspondence and the follow-up packet of described I frame.Associated description among specific implementation and the step S302 is similar, is not described in detail here.
First embodiment provided by the invention is a kind of IPTV operation system, and its structure comprises terminal, EPG server, CMS and media server as shown in Figure 4.
Described terminal is collected the various contextual informations of terminal, and described contextual information mainly comprises the terminal attributive informations such as coded format of terminal type, network insertion type, resolution, support.
In described media server, preserved a plurality of media files for each program, described media file is corresponding with the attribute information of described terminal.
Among the described CMS, preserved the link path of a plurality of media files of each program correspondence, as metadata (comprising URL) of media file etc.
Signal transitive relation in the system between each components and parts is as follows:
Terminal sends the HTTP request message to the EPG server, wherein carries parameters such as " Accept ", " X-up-bearer-type ", " X-resolution "; Here need current http protocol is expanded, promptly add " X-up-bearer-type ", " X-resolution " two new arguments among the Enity header in the HTTP request message." X-up-bearer-type " parametric representation network insertion type wherein is used for determining the approximate range of terminal access bandwidth; The resolution of described " X-resolution " parametric representation terminal.
After the EPG server receives described request message, resolve and obtain the attribute information of terminal according to the contextual information of terminal, as obtaining the network insertion type that terminal is supported by " X-up-bearer-type " in the request, thereby obtain the approximate range of the access bandwidth of terminal, determine the broadcast code check of a recommendation; Obtain the resolution of terminal by " X-resolution " in the request; Obtain the coded format that terminal is supported by " Accept " in the request.
The EPG server sends to described CMS with the attribute information of described terminal.
Described CMS chooses the metadata of corresponding media file according to the attribute information of described terminal, and sends it to described EPG server.
Described EPG server is generated to the link path of corresponding media file according to described metadata, and described link path is transferred to described terminal.
Described terminal connects corresponding media file in the described media server according to described link path, and obtains corresponding media data.
In the in progress process of media file, if the user prepares to switch to new terminal from former terminal, then described media server is from just finding the I frame that is about to transmission playing media file, and according to each I frame and its corresponding relation of media file in the position of media file, between the sampling time, obtain the sampling time and the position of described I frame in media file of described I frame, and stop to send the later data in position that are positioned at described I frame in the media file.
After the user switched to new terminal, described new terminal sent the HTTP request message to the EPG server.
After the EPG server receives the request of described new terminal, contextual information according to described new terminal is resolved terminal ability information, obtain the attribute information of described new terminal, the attribute informations of supporting as the network insertion type of new terminal, terminal resolution and terminal such as coded format.Attribute information with described new terminal sends to described CMS then.
Described CMS chooses the metadata of corresponding media file according to the attribute information of described new terminal, and sends it to described EPG server.
Described EPG server is generated to the link path of corresponding media file according to described metadata, and described link path is transferred to described new terminal.
Described new terminal connects corresponding media file in the described media server according to described link path.
Described media server is according to each I frame and its corresponding relation in the position of media file, between the sampling time of media file, and the sampling time of the last I frame that sends, and obtains the position of described I frame in the media file of described new terminal request; And, in the media file of described new terminal request, find corresponding I frame according to described position, and send the data of described I frame correspondence, and the follow-up data of described I frame.
Undertaken alternately by rtcp protocol and terminal in the described media server, obtain the packet drop and the jitter conditions of network, according to the variation of these situations, the media server adjustment is sent to the media data of terminal.The concrete processing procedure of terminal and described media server is as follows:
When continuing to be, loss rate and/or jitter rate rise or the decline state, and the lasting time that surpasses setting threshold is when arriving first setting-up time, media server determines that current network service quality changes, and take code check dynamically to adjust strategy, stop to send the media data of current transmission, select to be fit to high code check (when network quality rises)/low code check (the when network quality descends) media file of current network service quality, and the media data in the described media file is transferred to described terminal.
When loss rate and/or jitter rate continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving second setting-up time, then media server determines that current network service quality descends, and it is tactful to take to flow thinization, according to stopping to send the audio frequency media data earlier, stop to send the predictive frame video media-data again, stop the order of key frame media data at last, adjust the media data of current transmission.
Specific implementation process, identical with associated description among the method embodiment, be not described in detail here.
Above-mentioned first setting-up time and second setting-up time can adopt timer to realize.
Suppose on the media server each program have been generated 12 media files, corresponding code rate is respectively 2Mbps, 1.5Mbps and 200Kbps, and the corresponding codes form is respectively MPEG-4 and H.264, and corresponding resolution is respectively 240 * 320 and 1024 * 768.Using fixed terminal and portable terminal to enjoy same IPTV demand (telecommunication) service respectively with a user below is example, first embodiment provided by the invention and second embodiment is described:
Mr Smith wants on the way home by watching that TV dismisses the boring time, by portable terminal-mobile phone based on the EPG programme of http protocol to the program request of EPG server requests.
The EPG server parses is from the HTTP request of described portable terminal, and the Access Network of finding described portable terminal is GPRS, and resolution is 240 * 320, the coded format of support MPEG-4 etc.
It is adaptive that the EPG server carries out static terminal, the code check that mails to the media file of each program chaining in the EPG programme of described portable terminal is 200Kbps (determining that according to network insertion type GPRS the code check of playing is 200Kbps), resolution is 240 * 320, and coded format is MPEG-4.
Behind the program that Mr Smith need to select, send authorization requests by described portable terminal to media server, media server carries out authorization check according to the user profile of local cache.After mandate was passed through, it was that 200Kbps, resolution are 240 * 320, coded format is that the MPEG-4 media file sends to portable terminal that media server is selected code check.
After Mr Smith got home, sensation was watched program with described portable terminal, and effect is bad, wants to continue to watch this program with television set.He just ends to watch on mobile phone, turns on television set and STB simultaneously.At this moment, media server is noted the current location of this playing programs, i.e. the sampling time of the last I frame correspondence that sends.The network type that STB inserts is ADSL, the coded format of support H.264, the resolution of television set is 1024 * 768.At this moment, it is adaptive that media server carries out static terminal once more, the code check of the media file of each program chaining in the EPG programme that sends is 2Mbps (determining that according to network insertion type ADSL the code check of playing is 2Mbps), and coded format is for H.264, and the resolution of support is 1024 * 768.Media server is according to the sampling time of the last I frame correspondence that sends, in new media file, find described I frame, begin to send the follow-up packet of I frame in this new media file, Mr Smith can then watch the program of not finishing watching on mobile phone on the television set.
When having arrived some time points, owing to use the people of network very many, it is serious that media server mails to the data-bag lost of Mr Smith family.At this moment, media server just can dynamically be adjusted code check, and sending code check to terminal is that to replace code check be the media file of 2Mbps for the media file of 1.5Mbps.
The 3rd embodiment provided by the invention is a kind of media server, and its structure comprises as shown in Figure 5: media file is set up unit, media file selected cell, data transmission unit and dynamic adaptation module.
Described media file is set up the unit, is used for setting up different media files according to the attribute information of different types of terminals, and each key frame (I frame) and its corresponding relation in the position of media file, between the sampling time of setting up media file.
Described media file selected cell is according to the service request of different types of terminals, for described terminal is selected corresponding media file;
Described data transmission unit is transferred to described terminal with the media data in the selected media file.If in the playback of media files process, the user switches to new terminal from original terminal, described data transmission unit is also from just finding the I frame that is about to transmission playing media file, and according to each I frame and its corresponding relation of media file in the position of media file, between the sampling time, obtain the sampling time of described I frame, and the position of described I frame in described media file, and stop to send and be positioned at the later data of described I frame in the media file;
After described media server receives the request of described new terminal, described data transmission unit is according to each I frame and its corresponding relation in the position of media file, between the sampling time of media file, and the sampling time of the last I frame that sends, obtain the position of described I frame in the media file that newly is fitted to; And, in described media file, find corresponding I frame according to described position, and send the data of described I frame correspondence, and the follow-up data of described I frame.
In the in progress process of media file, during wrapping, the RTCPRR that described dynamic adaptation module sends according to terminal carries loss rate and/or jitter rate information, determine current network service quality, and adjust the media data of current transmission according to described current network service quality.Associated description among the specific implementation process and first embodiment is identical, is not described in detail here.
The specific embodiments that provides by the invention described above as can be seen, the electronic program EPG server obtains the link information of the media file corresponding with the static attribute information of terminal from CMS, and generates the link path of being correlated with according to described link information; Terminal is according to the media file of described link path to media server request correspondence, and obtain corresponding media data, therefore attribute informations such as the network insertion type that can support according to dissimilar terminals of the present invention, resolution, coded format send the media data that is fit to, thereby have realized supporting the adaptive of different types of terminals; And document No. is fairly simple.
In addition, by the present invention, different types of terminals can use identical media server, can unify to dispatch the media resource of media server, makes load balancing between different media servers.
In addition, by the present invention, dissimilar terminals can be used identical IPTV business platform, and when increasing new terminal, only need in media server, to add corresponding media file according to the attribute information of described terminal, and do not need to make up media delivery service for it separately, so not only make things convenient for the expansion of new terminal, and avoided the repeated construction of IPTV business platform.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (25)
1, a kind ofly it is characterized in that, comprising for dissimilar terminals provides the method for IPTV business:
The electronic program EPG server obtains the link information of the media file corresponding with the static attribute information of terminal from Content Management System CMS, and generates the link path of being correlated with according to described link information;
Terminal is according to the media file of described link path to media server request correspondence, and obtains corresponding media data.
2, the method for claim 1 is characterized in that, also comprises:
In media server, set up different media files according to the attribute information of different types of terminals; And, in CMS, set up the corresponding relation between the link information of the attribute information of different types of terminals and media file.
3, the method for claim 1 is characterized in that, also comprises:
In media server, set up each key frame and its corresponding relation of media file in the position of media file, between the sampling time.
4, method as claimed in claim 3 is characterized in that, also comprises:
If in the playback of media files process, the user prepares to switch to new terminal from original terminal, media server is from just finding the key frame that is about to transmission playing media file, and according to each key frame and its corresponding relation of media file in the position of media file, between the sampling time, obtain the sampling time and the position of described key frame in media file of described key frame, and stop to send the later data in position that are positioned at described key frame in the media file.
5, method as claimed in claim 4 is characterized in that, also comprises:
If in the playback of media files process, after the user switches to new terminal, described new terminal obtains the link information of the media file corresponding with the static attribute information of terminal by the EPG server from CMS, and generates relevant link path by the EPG server according to described link information;
The media file that described new terminal please be looked for novelty and be fitted to media server according to described link path;
Described media server is according to each key frame and its corresponding relation in the position of media file, between the sampling time of media file, and the sampling time of the last key frame that sends, obtain the position of key frame in the described media file that newly is fitted to of described last transmission;
According to described position, in the described media file that newly is fitted to, find corresponding key frame, and send the data of described key frame correspondence, and the follow-up data of described key frame.
As any described method of claim 1 to 5, it is characterized in that 6, described terminal obtains the process of the link path of the media file corresponding with the static attribute information of described terminal by the EPG server from CMS, specifically comprise:
Terminal sends the media business request to the EPG server;
After the EPG server receives the media business request of terminal, obtain the static attribute information of terminal according to the contextual information of terminal;
Static attribute information according to described terminal, from described CMS, obtain the link information of the media file corresponding with the static attribute information of described terminal, and be generated to the link path of corresponding media file, and it is transferred to described terminal according to described link information.
7, method as claimed in claim 6 is characterized in that, the static attribute information of described terminal comprises: the resolution of network insertion type, terminal and/or the coded format of support.
8, method as claimed in claim 7 is characterized in that, in the in progress process of media file, also comprises:
Terminal periodic ground sends RTCP Real-time Transport Control Protocol RTCP RR bag; Wherein carry loss rate and/or jitter rate information;
Media server is determined current network service quality according to described loss rate and/or jitter rate information, and adjusts the media data of current transmission according to described current network service quality.
9, method as claimed in claim 8, it is characterized in that described media server is determined current network service quality according to described loss rate and/or jitter rate information, and adjust the process of the media data of current transmission according to described current network service quality, specifically comprise:
When continuing to be, loss rate and/or jitter rate rise or the decline state, and the lasting time that surpasses setting threshold is when arriving first setting-up time, then media server determines that current network service quality changes, and take code check dynamically to adjust strategy, stop the media data of current transmission, select to be fit to the high code check/low code check media file of current network service quality, and the media data in the described media file is transferred to described terminal.
10, method as claimed in claim 9, it is characterized in that described media server is determined current network service quality according to described loss rate and/or jitter rate information, and adjust the process of the media data of current transmission according to described current network service quality, also comprise:
When loss rate and/or jitter rate continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving second setting-up time, then media server determines that current network service quality descends, and it is tactful to take to flow thinization, according to stopping to send the audio frequency media data earlier, stop to send the predictive frame video media-data again, stop the order of key frame media data at last, adjust the media data of current transmission.
11, a kind ofly it is characterized in that, comprising for dissimilar terminals provides the method for IPTV business:
In the in progress process of media file, terminal periodic ground sends RTCP Real-time Transport Control Protocol RTCP RR bag; Wherein carry loss rate and/or jitter rate information;
Media server is according to described loss rate and/or jitter rate information, determine current network service quality, select and the corresponding media file of terminal static attribute information according to current network service quality, and stop the media data of current transmission, the media data of the media file selected is transferred to described terminal.
12, method as claimed in claim 11, it is characterized in that, described media server is according to described loss rate and/or jitter rate information, determine current network service quality, select and the corresponding media file of terminal static attribute information according to current network service quality, and stop the media data of current transmission, and the media data of the media file selected is transferred to the process of described terminal, specifically comprise:
When continuing to be, loss rate and/or jitter rate rise or the decline state, and the lasting time that surpasses setting threshold is when arriving first setting-up time, media server determines that current network service quality changes, and take code check dynamically to adjust strategy, stop the media data of current transmission, select to be fit to current network service quality, and the high code check corresponding with terminal static attribute information/hang down the code check media file, and the media data in the described media file is transferred to described terminal.
13, method as claimed in claim 11, it is characterized in that, described media server is according to described loss rate and/or jitter rate information, determine current network service quality, select and the corresponding media file of terminal static attribute information according to current network service quality, and stop the media data of current transmission, and the media data of the media file selected is transferred to the process of described terminal, also comprise:
When loss rate and/or jitter rate continue to be the rising state, and the lasting time that surpasses setting threshold is when arriving second setting-up time, then media server determines that current network service quality descends, and it is tactful to take to flow thinization, according to stopping to send the audio frequency media data earlier, stop to send the predictive frame video media-data again, stop the order of key frame media data at last, select to be fit to current network service quality, and with the corresponding media file of terminal static attribute information, and the media data of the described media file of correspondence is transferred to described terminal.
14, a kind of IPTV operation system is characterized in that, comprising:
Terminal, electronic program EPG server, Content Management System CMS and media server;
Described EPG server obtains the link information of the media file corresponding with the static attribute information of terminal from described CMS, and generates relevant link path according to described link information;
Described terminal is according to the media file of described link path to described media server request correspondence, and obtains corresponding media data.
15, system as claimed in claim 14 is characterized in that, described media server also is used for:
Set up different media files according to the attribute information of different types of terminals.
16, system as claimed in claim 14 is characterized in that, described media server also is used for:
Set up each key frame and its corresponding relation of media file in the position of media file, between the sampling time.
17, system as claimed in claim 16 is characterized in that, described media server also is used for:
When in the playback of media files process, when the user switches to new terminal from original terminal, from just playing media file, finding the key frame that is about to transmission, and according to each key frame and its corresponding relation of media file in the position of media file, between the sampling time, obtain the sampling time and the position of described key frame in media file of described key frame, and stop to send the later data in position that are positioned at described key frame in the media file;
After described media server receives the request of described new terminal, each key frame and its corresponding relation according to media file in the position of media file, between the sampling time, and the sampling time of the last key frame that sends, obtain the position of described key frame in the described media file that newly is fitted to; And, in the described media file that newly is fitted to, find corresponding key frame according to described position, and send the data of described key frame correspondence, and the follow-up data of described key frame.
18, system as claimed in claim 17 is characterized in that, described media server also is used for:
In the in progress process of media file, during wrapping, the RTCP Real-time Transport Control Protocol RTCP RR that media server sends according to terminal carries loss rate and/or jitter rate information, determine current network service quality, and adjust the media data of current transmission according to described current network service quality.
19, system as claimed in claim 14 is characterized in that, described CMS also is used for:
Set up the corresponding relation between the link information of the attribute information of different types of terminals and media file.
20, system as claimed in claim 14 is characterized in that, described terminal also is used for: obtain the contextual information of terminal, comprise terminal attributive information in the described contextual information.
21, a kind of media server is characterized in that, comprising:
The media file selected cell is used for the request according to different types of terminals, for described terminal is selected corresponding media file;
Data transmission unit is used for the media data of described media file is transferred to described terminal.
22, media server as claimed in claim 21 is characterized in that, also comprises: media file is set up the unit, is used for setting up different media files according to the attribute information of different types of terminals.
23, media server as claimed in claim 21 is characterized in that, described media file is set up the unit and also is used for: each key frame and its corresponding relation in the position of media file, between the sampling time of setting up media file.
24, media server as claimed in claim 23 is characterized in that, described data transmission unit also is used for:
When in the playback of media files process, when the user switches to new terminal from original terminal, from just playing media file, finding the key frame that is about to transmission, and according to each key frame and its corresponding relation of media file in the position of media file, between the sampling time, obtain the sampling time and the position of described key frame in media file of described key frame, and stop to send the later data in position that are positioned at described key frame in the media file;
After described media server receives the request of described new terminal, each key frame and its corresponding relation according to media file in the position of media file, between the sampling time, and the sampling time of the last key frame that sends, obtain the position of described key frame in the described media file that newly is fitted to; And, in the described media file that newly is fitted to, find corresponding key frame according to described position, and send the data of described key frame correspondence, and the follow-up data of described key frame.
25, media server as claimed in claim 24, it is characterized in that, also comprise the dynamic adaptation module, be used for when the in progress process of media file, during wrapping, the RTCP Real-time Transport Control Protocol RTCP RR that media server sends according to terminal carries loss rate and/or jitter rate information, determine current network service quality, and adjust the media data of current transmission according to described current network service quality.
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