CN102413369A - On-demand method and on-demand system of digital television time-shifting programs - Google Patents
On-demand method and on-demand system of digital television time-shifting programs Download PDFInfo
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Abstract
The invention provides an on-demand method and an on-demand system of digital television time-shifting programs. The method comprises the following steps that: a digital television receiving terminal, namely a set-top box (STB), sends a time-shifting on-demand request to a digital television portal and triggers the digital television portal to acquire a program list; according to a request for acquiring the program list, a navigation server (NS) triggers a content delivery network (CDN) to record programs in the program list, optimizes the program list which is requested by the digital television portal according to a program recording result, which is fed back by the CDN, of the recorded programs, and sends the optimized program list and an address of a session manager (SM) to the STB through the digital television portal; and according to the optimized program list, the STB sends a time-shifting playing request to the SM, acquires the address of a streaming server (SS) and the information of an internet protocol quadrature amplitude modulator (IPQAM) from the SM, and acquires pushing streams from the SS. By adoption of the method and the system, under the condition of fail of recording of the recorded programs which correspond to the programs in the program list, the on demand of the time-shifting programs can be finished.
Description
Technical field
The present invention relates to the digital television on-demand technology, particularly a kind of order method of digital television time-shifting program and VOD system.
Background technology
(Next Generation On Demand Video Architecture is the cover video-on-demand service framework of new generation of Concast company definition NGOD), and the core of framework is a video-on-demand service in program request of future generation.On the basis of NGOD, expand, can realize other video-on-demand service, such as exchange broadcast video or network PVR.
Instant time shift is a kind of new interactive television service; Be the user in live process of watching TV programme; After pressing pause button and leaving, the fragment of the TV programme of being watched in the time period that rollback button capable of using playback is left avoids missing the fragment of the required TV programme of user.
Fig. 1 is the order method flow chart of existing time shift program.Combine Fig. 1 at present, the order method of existing time shift program is described, specific as follows:
Step 101: (Set-Top Box STB) sends the time shift order request to digital television gateway (Portal) to receiving terminal for digital television;
In this step, (On Demand Client ODC), sends to Portal with the request of user's time-shift play-on-demand program to STB, i.e. shifting state when live state switches to as the program request client.
Wherein, comprise the identification information of program request time and program request client in the time shift order request at least, so that confirm to carry out the STB information of time shift program program request and the programme information of program request.
Step 102:Portal send obtain programme request to navigation server (Navigation Server, NS);
In this step, obtain the programme request and comprise the program request time point at least, so that NS provides the programme information of mating with the program request time of time shift program request.Wherein, Portal also can further send to obtain and order token (token ID) and ask to NS.
Step 103:NS transmission obtains programme and responds to Portal;
In this step, NS is according to program request time and preset N blanking time, and acquisition point is the programme of N duration before and after the time corresponding point between sowing time, and programme is carried at obtains programme and send to Portal in responding.Wherein, NS also further returns and orders token to Portal.
Step 104:Portal generates playing progress bar;
Portal generates playing progress bar according to that receive and the programme program request time correlation, so that the user carries out time shift program program requests operations such as F.F., rewind down.
(Real Time Streaming Protocol RTSP) sends RTSP and goes here and there to STB step 105:Portal according to real time streaming transport protocol;
RTSP string in this step comprises at least orders token and session manager (Session Manager, address information SM).
Step 106:STB sends the time shifting broadcasting request to SM through RTSP;
In this step, STB, sends and carries the extremely corresponding SM of the time shifting broadcasting request of ordering token according to the address information of SM according to the RTSP agreement.Wherein, the channel, programm name and the time information that comprise the program that carries out the time shift program request in the time shifting broadcasting request at least.
Step 107 is obtained playlist from NS to step 108:SM;
SM is according to channel, programm name and the time information of the program that carries in the time shifting broadcasting request that receives; The information of the program recording that the programm name of the channel of acquisition program is all identical from the performance recording list of NS, utilizing, the information of program recording generates playlist.
Wherein, the performance recording list that NS preserves is that (Content Delivery Network is CDN) to the tabulation that is formed by program recording of NS feedback for content distributing network; Record in this performance recording list each program start time, program end time, the program of program recording channel and whether record the identification information of success in order to write down this program.
Step 109:SM obtains video server (Streaming Server, SS) information and send playlist to SS;
In this step, SM according to playlist and carry out the channel of the program of time shift program request, obtain SS information, and send playlist to corresponding SS.
Step 110:SS obtains the corresponding audio-video document of playlist from content distributing network CDN; CDN can be in real time leads user's request on the nearest SS as service node of user according to being connected of network traffics and each node, load state and to integrated informations such as user's distance and response times again.
Step 111:SS sends to play and responds to SM;
In this step, the audio-video document corresponding that SS has obtained to the SM feedback with playlist.
Step 112:SM transmission SS address and edge modulator (IPQAM) information are to STB;
In this step, SM sends in order to the SS address of carrying out plug-flow with in order to the STB of IPQAM information to the time-shifting program request program request of carrying out frequency locking.
Step 113:STB obtains plug-flow from SS.
In this step, STB obtains the corresponding audio/video flow of time shift program program request according to the SS address.
When the user carried out time shift program program request as shown in Figure 1 through STB, (Content Management System, CMS) (Real-Time Manager RTM) carried out recording of time shift program with the real-time management device for CDN, Content Management System.
Fig. 2 is the method flow diagram of existing performance recording.Combine Fig. 2 at present, the method for existing performance recording is described, specific as follows:
Step 201:NS sends the programme of time shift program request to CMS;
In this step be NS receive from Portal obtain the programme request after, the programme that sends the time shift program request starts the flow process of recording of time shift program to CMS.
Step 202:CMS sends the programme of time shift program request to RTM;
In this step, CMS can send programme to RTM through the IF2.ProgramList_XML interface.
Step 203:RTM sends response message to CMS;
Response message in this step is the programme that RTM notice CMS successfully receives the time shift program request.
Step 204:RTM generates the plan of recording;
RTM in this step generates the plan of recording according to the programme of the time shift program request that receives; Wherein, record and comprise time point, duration, channel and the programm name of treating recorded program in the works at least.
Step 205:RTM sends recording task to CDN;
In this step, RTM constantly scans the plan of recording that is generated, and according to recording the broadcast time of program in the works, submits recording task through the A3.TransferContent interface to real-time injection (RTI) network element that CDN comprises.
Step 206:CDN sends response message to RTM;
In this step, the RTI network element that CDN comprises returns a response message to RTM, and RTM successfully receives recording task in order to indication.
Step 207:CDN program recording;
In this step, the RTI network element that CDN comprises receives audio/video flow according to recording task, and program recording also generates index file, skip forward/back file.
Step 208:RTM sends the recording state request to CDN;
This step is in the process of the RTI network element program recording that CDN comprises, and RTM sends the RTI network element to CDN of asking in order to the inquiry recording state according to preset blanking time, specifically can ask recording state to RTI through the A3.GetTransferStatus interface.
Wherein, recording state is that program recording accounts for the percentage of treating program recording.
Step 209:CDN sends recording state and responds to RTM;
In this step, the RTI network element that CDN comprises is after receiving the recording state request, and according to the situation of program recording, the feedback recording state is to RTM.
Step 210:CDN sends the performance recording result to RTM;
In this step, CDN passes through the A3.TransferContent interface to RTM asynchronous notifications performance recording result; CDN judges program recording after having accomplished a performance recording, obtains program recording and whether records information of successful.
In this step, the performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to write down this program.
Step 211:RTM sends the performance recording result to CMS;
In this step, RTM is according to the asynchronous notifications message that receives, through the NGOD.MTI-A2.ContentStatus interface, to CMS notice performance recording result.
Step 212:CMS writes the performance recording result in the performance recording list of NS;
In this step; CMS mutual through with NS; The performance recording result is write in the performance recording list of NS preservation; In other words, whether record the identification information of success and write in the performance recording list that NS preserves with the channel of program start time, program end time, program and in order to write down this program.
In the process of CDN program recording, because the problem of network or information source, possibly there is the problem of recording failure in CDN institute recorded program, such as there not being normal termination etc., so that program recording can't be by normal use.Based on foregoing, if SM exists when recording the problem of failure to the corresponding program of playlist that CDN asked through SS according to playlist, STB is the audio/video flow that can't obtain the program of its program request from SS, also just can't realize the program request of time shift program.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of order method of digital television time-shifting program, this method can with programme in the corresponding program recording of program exist and record under the situation of failure, accomplish the program request of time shift program.
The object of the present invention is to provide a kind of VOD system of digital television time-shifting program, this system can with programme in the corresponding program recording of program exist and record under the situation of failure, accomplish the program request of time shift program.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of order method of digital television time-shifting program, this method comprises:
A, receiving terminal for digital television send the time shift order request to digital television gateway Portal, trigger Portal and obtain programme from navigation server NS;
B, NS are according to the programme request of obtaining from Portal; Trigger the program that comprises in the content distributing network CDN program recording list; Whether record the identification information of success according to what the performance recording result of the program recording of CDN feedback comprised in order to recorded program; Optimize the programme of Portal request, the programme after obtaining to optimize also is sent to Portal;
Programme after C, Portal transmission are optimized and the address of session manager SM are to receiving terminal for digital television;
D, receiving terminal for digital television send the time shifting broadcasting request to SM according to the programme after optimizing, and obtain video server SS address and edge modulator IPQAM information from SM, obtain plug-flow from video server SS.
In the said method, whether what the performance recording result of the said program recording according to CDN feedback of step B comprised records the identification information of success in order to recorded program, and the programme of optimizing the Portal request comprises:
B1, NS be according to the channel and the programm name of the program that comprises in the programme, from the performance recording list, obtain with programme in the channel program recording identical of program with programm name;
B2, whether record the identification information of success in order to recorded program according to what the performance recording result of the program recording of CDN feedback comprised; When determination step B 1 said program recording is recorded failure; Program that will be corresponding with said program recording is rejected from the programme of Portal request, with the programme after rejecting as the programme after optimizing.
In the said method, whether what the performance recording result of the said program recording according to CDN feedback of step B comprised records the identification information of success in order to recorded program, and the programme of optimizing the Portal request comprises:
B3, NS be according to the channel and the programm name of the program that comprises in the programme, from the performance recording list, obtain with programme in the channel program recording identical of program with programm name;
B4, according to the identification information that the performance recording result of the program recording of CDN feedback comprises, the said program recording of determination step B3 is recorded failure;
B5, the program end time that comprises according to the performance recording result of program recording; Program before the concluding time of program corresponding with the program recording of recording failure in the programme is rejected; With being the initial moment with concluding time of the corresponding program of program recording of recording failure in the programme; The concluding time of corresponding programme is the finish time with program request time of carrying in the time shift order request, with the programme between the initial moment to the finish time as the programme after optimizing.
In the said method, the request of the said transmission time shifting broadcasting of step D comprises to SM:
Receiving terminal for digital television is according to real time streaming transport protocol RTSP, and according to the address of SM, the time shifting broadcasting request that programme information is carried in transmission is to SM;
It is channel, programm name and the time information of recording the corresponding program of the program recording of success that said programme information comprises identification information among the performance recording result at least; Said temporal information for the program request time of carrying in the time shift order request be the duration information that starting point is advanced or retreated.
In the said method, step D is said to obtain the SS address and IPQAM information comprises from SM:
SM is according to the time shifting broadcasting request that receives, from NS obtain with optimization after the corresponding optimization of programme after playlist, and send to SS;
SS from CDN obtain with optimize after playlist identification information corresponding, that the performance recording result comprises be the program recording of recording success, and pass through SM transmission SS address and IPQAM information to receiving terminal for digital television.
A kind of VOD system of digital television time-shifting program, this system comprises:
Receiving terminal for digital television sends the time shift order request to digital television gateway Portal;
Portal according to the time shift order request, sends and obtains the programme request to navigation server NS, and programme after transmission is optimized and the address of session manager SM are to receiving terminal for digital television;
NS; According to obtaining the programme request; Trigger the program that comprises in the content distributing network CDN program recording list; According to CDN feedback the performance recording result of program recording comprise whether record the identification information of success in order to recorded program, optimize the programme of Portal request, the programme after obtaining to optimize also is sent to Portal;
Receiving terminal for digital television according to programme after optimizing and the address of SM, sends the time shifting broadcasting request to SM, according to video server SS address and edge modulator IPQAM information, obtains plug-flow from SS;
SM according to the time shifting broadcasting request, sends SS address and IPQAM information to receiving terminal for digital television.
Preferably, said receiving terminal for digital television is also according to real time streaming transport protocol RTSP, programme information is carried in the time shifting broadcasting request is sent to SM;
It is channel, programm name and the time information of recording the corresponding program of the program recording of success that said programme information comprises identification information among the performance recording result at least; Said temporal information for the program request time of carrying in the time shift order request be the duration information that starting point is advanced or retreated.
Preferably, said SM is according to the time shifting broadcasting request, also from NS obtain with optimization after the corresponding optimization of programme after playlist, and send to SS;
Said SS also from CDN obtain with optimize after playlist identification information corresponding, that the performance recording result comprises be the program recording of recording success, transmission SS address and IPQAM information is said SM extremely;
In the said system, said NS comprises:
Memory cell is preserved programme and performance recording list; Said performance recording list comprises the performance recording result of program recording, and said performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to recorded program;
Record trigger element,,, trigger the program that comprises in the CDN program recording list, with the performance recording of CDN feedback as a result in the performance recording list of write storage unit through Content Management System CMS and real-time management device RTM according to obtaining the programme request;
Matching unit; The channel and the programm name of the program that comprises according to the programme corresponding with obtaining the programme request; From the performance recording list of memory cell, obtain with programme in the channel program recording identical of program with programm name, and send to the first optimization unit;
The first optimization unit; In the performance recording list according to the memory cell preservation; Whether what the performance recording result of program recording comprised records the identification information of success in order to recorded program; Judge that when said program recording was recorded failure, program that will be corresponding with said program recording was rejected from the programme of Portal request, export the programme after rejecting to Portal as the programme after optimizing.
In the said system, said NS comprises:
Memory cell is preserved programme and performance recording list; Said performance recording list comprises the performance recording result of program recording, and said performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to recorded program;
Record trigger element,,, trigger the program that comprises in the CDN program recording list, with the performance recording of CDN feedback as a result in the performance recording list of write storage unit through Content Management System CMS and real-time management device RTM according to obtaining the programme request;
Matching unit; The channel and the programm name of the program that comprises according to the programme corresponding with obtaining the programme request; From the performance recording list of memory cell, obtain with programme in the channel program recording identical of program with programm name, and send to the second optimization unit;
The second optimization unit; In the performance recording list according to the memory cell preservation; Whether what the performance recording result of program recording comprised records the identification information of success in order to recorded program; Judge when said program recording is recorded failure; According to the program end time that the performance recording result of program recording comprises, the program before the concluding time of program corresponding with the program recording of recording failure in the programme is rejected, with being the initial moment with concluding time of the corresponding program of program recording of recording failure in the programme; The concluding time of corresponding programme is the finish time with the program request time of carrying in the time shift order request, exports the programme between the initial moment to the finish time to Portal as the programme after optimizing.
Visible by above-mentioned technical scheme; The invention provides a kind of order method and VOD system of digital television time-shifting program; NS is according to the performance recording result of the corresponding program recording of the programme of the programme request of obtaining of Portal and CDN feedback, and the programme of request is optimized, and returns programme after the optimization to Portal; STB obtains the time shift program that can play according to the programme after optimizing from SS.Adopt method and system of the present invention, can with programme in the corresponding program recording of program exist and record under the situation of failure, accomplish the program request of time shift program.
Description of drawings
Fig. 1 is the order method flow chart of existing time shift program.
Fig. 2 is the method flow diagram of existing performance recording.
Fig. 3 is the order method flow chart of digital television time-shifting program of the present invention.
Fig. 4 is the structural representation of the VOD system embodiment one of digital television time-shifting program of the present invention.
Fig. 5 is the structural representation of the VOD system embodiment two of digital television time-shifting program of the present invention.
Embodiment
For make the object of the invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
The invention provides a kind of order method and VOD system of digital television time-shifting program, NS is optimized the programme of asking according to the programme request of obtaining of Portal; Return programme after the optimization to Portal; STB sends order request to SM according to the programme after optimizing, and SM is according to the programme after optimizing, and obtains the playlist after the optimization from NS; So that SS is according to the playlist after optimizing; Obtain the program recording that STB can play from CDN, realized with programme in the corresponding program recording of program exist and record under the situation of failure the program request of completion time shift program.Optimization to programme of the present invention; Be that the program that will record in the corresponding programme of the program recording of failure is rejected from programme; Or according to the program recording of recording failure; Programme before the time corresponding point of program recording of recording failure is rejected; With the concluding time of the programme after rejecting is the initial moment, and the concluding time of corresponding programme is the finish time with the program request time of time shift program, with the programme between the initial moment to the finish time as the programme after optimizing.
Fig. 3 is the order method flow chart of digital television time-shifting program of the present invention.Combine Fig. 3 at present, the order method of digital television time-shifting program of the present invention is described, specific as follows:
Step 301:STB sends the time shift order request to Portal;
In this step, STB sends to Portal as ODC with the request of user's time-shift play-on-demand program, i.e. shifting state when live state switches to.
Wherein, comprise the identification information of program request time and program request client in the time shift order request at least, so that confirm to carry out the STB information of time shift program program request and the programme information of program request.
Step 302:Portal sends and obtains the programme request to NS;
In this step, obtain the programme request and comprise the program request time at least, so that NS provides the programme information of mating with the program request time of time shift program request.Wherein, Portal also can further send to obtain and order token (token ID) and ask to NS.
NS of the present invention receive from Portal obtain the programme request after, trigger performance recording flow process shown in Figure 2, obtain the performance recording result of program recording, no longer the method for performance recording is given unnecessary details at this.
The programme that step 303:NS sends after optimizing responds to Portal;
In this step; NS receive Portal obtain the programme request after; Whether record the identification information of success and be optimized in order to write down this program according to what the performance recording result of the pairing performance recording Dan Zhongyi of programme program recording comprised, Portal is given in the programme that sends after optimizing.In this step, NS can further send and order token response to Portal.
Wherein, the performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to write down this program.
Wherein, whether NS records the identification information of success and is optimized and comprises in order to write down this program according to what the performance recording result of the pairing performance recording Dan Zhongyi of programme program recording comprised:
NS is according to the channel and the programm name of the program that comprises in the programme; From the performance recording list, obtain with programme in the channel program recording identical of program with programm name; When the identification information that comprises according to the performance recording result of program recording is judged this program recording has been recorded failure; To from the programme of Portal request, reject with program recording is corresponding program and information thereof, with the programme after rejecting as the programme after optimizing
Perhaps NS is according to the channel and the programm name of the program that comprises in the programme; From the performance recording list, obtain with programme in the channel program recording identical of program with programm name; The identification information that comprises according to the performance recording result of program recording; Judge this program recording recorded when failure; According to the program end time that the performance recording result of program recording comprises, the program before the concluding time of program corresponding with the program recording of recording failure in the programme is rejected, with being the initial moment with concluding time of the corresponding program of program recording of recording failure in the programme; The concluding time of corresponding programme is the finish time with program request time of time shift program, with the programme between the initial moment to the finish time as the programme after optimizing.
Wherein, the programme after the optimization is the time shift program list that NS offers STB.
Step 304:Portal generates playing progress bar;
Portal generates playing progress bar according to the programme after that receive and the optimization program request time correlation, so that the user carries out time shift program program requests operations such as F.F., rewind down.
Step 305:Portal sends RTSP and goes here and there to STB;
RTSP string in this step comprises the address information of order token, SM and the programme after the optimization at least.
Step 306:STB sends the time shifting broadcasting request to SM through RTSP;
In this step, STB, sends and carries the extremely corresponding SM of the time shifting broadcasting request of ordering token according to the address information of SM according to the RTSP agreement.
Wherein, also comprise programme information in the time shifting broadcasting request; It is channel, programm name and the time information of recording the corresponding program of the program recording of success that programme information comprises identification information among the performance recording result at least.Temporal information for the program request time be the duration information that starting point is advanced or retreated.
Step 307:SM sends and obtains playlist request to NS;
SM is according to the programme information in the time shifting broadcasting request, among the request NS with optimize after the corresponding playlist of programme.
Step 308:NS returns playlist after the optimization to SM;
In this step, NS is according to the request of SM, and playlist sends to SM after the optimization that the programme after the optimization in the step 303 is corresponding.Wherein, not comprising identification information in the playlist after the optimization is the programme information of recording the corresponding program of the program recording of failure.
Playlist after step 309:SM obtains SS information and sends optimization is to SS;
This step can adopt among Fig. 1 109 method, and the playlist after the optimization that just will receive is sent to SS.
Step 310:SS obtains the corresponding program recording of playlist after the optimization from CDN;
Do not comprise identification information in the playlist after the optimization of obtaining in this step and be the programme information of the corresponding program of the program recording of recording failure, obtain the audio/video flow that the STB of plug-flow can normal play receives with regard to guaranteeing from SS like this.
The method of step 311 to step 313 is identical to the method for step 113 with this step 111 of Fig. 1, repeats no more at this.
Fig. 4 is the structural representation of the VOD system embodiment one of digital television time-shifting program of the present invention.Combine Fig. 4 at present, the VOD system of the digital television time-shifting program of embodiment one is described, specific as follows:
The VOD system of digital television time-shifting program of the present invention comprises: STB401, Portal402, NS403, SM404, SS405 and CDN406.
STB401 sends the time shift order request to Portal402.Wherein, the identification information that comprises program request time and program request client in the time shift order request at least.
Portal402 sends and obtains the programme request to NS403 according to the time shift order request, and programme after transmission is optimized and the address of SM are to STB401.Wherein, obtain the programme request and comprise the program request time at least, so that NS403 provides the programme information of mating with the program request time of time shift program request.
NS403 is according to obtaining the programme request; The program that comprises in the CDN406 program recording list; Whether record the identification information of success according to what the performance recording result of the program recording of CDN406 feedback comprised in order to recorded program; Optimize the programme of Portal402 request, the programme after obtaining to optimize also is sent to Portal402.Wherein, the performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to write down this program.
STB401 sends the time shifting broadcasting request to SM404 according to programme after optimizing and the address of SM, according to SS address and IPQAM information, obtains plug-flow from SS405.Particularly, STB401 is according to real time streaming transport protocol RTSP, programme information is carried in the time shifting broadcasting request is sent to SM404.Wherein, to comprise the identification information among the performance recording result at least be channel, programm name and the time information of recording the corresponding program of the program recording of success to programme information; Temporal information for the program request time of carrying in the time shift order request be the duration information that starting point is advanced or retreated.
SM404 sends SS address and IPQAM information to STB401 according to the time shifting broadcasting request.Particularly, SM404 is according to the time shifting broadcasting request, from NS403 obtain with optimization after the corresponding optimization of programme after playlist, and send to SS405; SS405 from CDN406 obtain with optimize after playlist identification information corresponding, that the performance recording result comprises be the program recording of recording success, transmission SS address and IPQAM information are to SM404.
Wherein, the NS403 in the present embodiment comprises: memory cell 4031, record trigger element 4032, matching unit 4033 and the first optimization unit 4034.
The channel and the programm name of the program that the programme corresponding with obtaining the programme request of matching unit 4033 bases comprises; From the performance recording list of memory cell 4031, obtain with programme in the channel program recording identical of program with programm name, and send to the first optimization unit 4034.
In the performance recording list of the first optimization unit 4034 according to memory cell 4031 preservations; Whether what the performance recording result of program recording comprised records the identification information of success in order to recorded program; Judge when program recording is recorded failure; To from the programme of Portal402 request, reject with the program that program recording is corresponding, export the programme after rejecting to Portal402 as the programme after optimizing, and the programme after will optimizing be saved in the memory cell 4033.
Fig. 5 is the structural representation of the VOD system embodiment two of digital television time-shifting program of the present invention.The system configuration of the system configuration of embodiment two shown in Figure 5 and embodiment one shown in Figure 4 is different is that the structure of NS403 is different, and other structures are identical with the structure of embodiment one, repeat no more at this.
The NS403 of present embodiment comprises: memory cell 4031, record trigger element 4032, matching unit 4033 and the second optimization unit 4035.
The channel and the programm name of the program that the programme corresponding with obtaining the programme request of matching unit 4033 bases comprises; From the performance recording list of memory cell 4031, obtain with programme in the channel program recording identical of program with programm name, and send to the second optimization unit 4035.
In the performance recording list of the second optimization unit 4035 according to memory cell 4031 preservations; Whether what the performance recording result of program recording comprised records the identification information of success in order to recorded program; Judge when program recording is recorded failure; The program end time that comprises according to the performance recording result of program recording; Program before concluding time of program corresponding with the program recording of recording failure in the programme is rejected, with being the initial moment with concluding time of the corresponding program of program recording of recording failure in the programme, with concluding time of the programme of the program request time correspondence of carrying in the time shift order request be the finish time; Export the programme between the initial moment to the finish time to Portal402 as the programme after optimizing, and the programme after will optimizing is saved in the memory cell 4033.
In the above-mentioned preferred embodiment of the present invention; When NS obtains the programme of programme request feedback to Portal in basis; The result is recorded in programme according to generating when the program recording, and the programme of request is optimized, and from the programme of request, rejecting the identification information that the performance recording result comprises is corresponding program and the information thereof of program recording of recording failure; Feedback can normal viewing programme information to Portal; So that follow-up when obtaining program recording according to the corresponding playlist of the programme after optimizing, the program recording that acquisition can be play has avoided recording the problem of the program request failure of the time shift program that failure causes.
In sum, more than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the order method of a digital television time-shifting program is characterized in that, this method comprises:
A, receiving terminal for digital television send the time shift order request to digital television gateway Portal, trigger Portal and obtain programme from navigation server NS;
B, NS are according to the programme request of obtaining from Portal; Trigger the program that comprises in the content distributing network CDN program recording list; Whether record the identification information of success according to what the performance recording result of the program recording of CDN feedback comprised in order to recorded program; Optimize the programme of Portal request, the programme after obtaining to optimize also is sent to Portal;
Programme after C, Portal transmission are optimized and the address of session manager SM are to receiving terminal for digital television;
D, receiving terminal for digital television send the time shifting broadcasting request to SM according to the programme after optimizing, and obtain video server SS address and edge modulator IPQAM information from SM, obtain plug-flow from video server SS.
2. method according to claim 1 is characterized in that, whether what the performance recording result of the said program recording according to CDN feedback of step B comprised records the identification information of success in order to recorded program, and the programme of optimizing the Portal request comprises:
B1, NS be according to the channel and the programm name of the program that comprises in the programme, from the performance recording list, obtain with programme in the channel program recording identical of program with programm name;
B2, whether record the identification information of success in order to recorded program according to what the performance recording result of the program recording of CDN feedback comprised; When the said program recording of determination step B1 is recorded failure; Program that will be corresponding with said program recording is rejected from the programme of Portal request, with the programme after rejecting as the programme after optimizing.
3. method according to claim 1 is characterized in that, whether what the performance recording result of the said program recording according to CDN feedback of step B comprised records the identification information of success in order to recorded program, and the programme of optimizing the Portal request comprises:
B3, NS be according to the channel and the programm name of the program that comprises in the programme, from the performance recording list, obtain with programme in the channel program recording identical of program with programm name;
B4, according to the identification information that the performance recording result of the program recording of CDN feedback comprises, the said program recording of determination step B3 is recorded failure;
B5, the program end time that comprises according to the performance recording result of program recording; Program before the concluding time of program corresponding with the program recording of recording failure in the programme is rejected; With being the initial moment with concluding time of the corresponding program of program recording of recording failure in the programme; The concluding time of corresponding programme is the finish time with program request time of carrying in the time shift order request, with the programme between the initial moment to the finish time as the programme after optimizing.
4. method according to claim 1 is characterized in that, the request of the said transmission time shifting broadcasting of step D comprises to SM:
Receiving terminal for digital television is according to real time streaming transport protocol RTSP, and according to the address of SM, the time shifting broadcasting request that programme information is carried in transmission is to SM;
It is channel, programm name and the time information of recording the corresponding program of the program recording of success that said programme information comprises identification information among the performance recording result at least; Said temporal information for the program request time of carrying in the time shift order request be the duration information that starting point is advanced or retreated.
5. method according to claim 1 is characterized in that, step D is said to obtain the SS address and IPQAM information comprises from SM:
SM is according to the time shifting broadcasting request that receives, from NS obtain with optimization after the corresponding optimization of programme after playlist, and send to SS;
SS from CDN obtain with optimize after playlist identification information corresponding, that the performance recording result comprises be the program recording of recording success, and pass through SM transmission SS address and IPQAM information to receiving terminal for digital television.
6. the VOD system of a digital television time-shifting program is characterized in that, this system comprises:
Receiving terminal for digital television sends the time shift order request to digital television gateway Portal;
Portal according to the time shift order request, sends and obtains the programme request to navigation server NS, and programme after transmission is optimized and the address of session manager SM are to receiving terminal for digital television;
NS; According to obtaining the programme request; Trigger the program that comprises in the content distributing network CDN program recording list; According to CDN feedback the performance recording result of program recording comprise whether record the identification information of success in order to recorded program, optimize the programme of Portal request, the programme after obtaining to optimize also is sent to Portal;
Receiving terminal for digital television according to programme after optimizing and the address of SM, sends the time shifting broadcasting request to SM, according to video server SS address and edge modulator IPQAM information, obtains plug-flow from SS;
SM according to the time shifting broadcasting request, sends SS address and IPQAM information to receiving terminal for digital television.
7. system according to claim 6 is characterized in that, said receiving terminal for digital television is also according to real time streaming transport protocol RTSP, programme information is carried in the time shifting broadcasting request is sent to SM;
It is channel, programm name and the time information of recording the corresponding program of the program recording of success that said programme information comprises identification information among the performance recording result at least; Said temporal information for the program request time of carrying in the time shift order request be the duration information that starting point is advanced or retreated.
8. system according to claim 6 is characterized in that, said SM is according to the time shifting broadcasting request, also from NS obtain with optimization after the corresponding optimization of programme after playlist, and send to SS;
Said SS also from CDN obtain with optimize after playlist identification information corresponding, that the performance recording result comprises be the program recording of recording success, transmission SS address and IPQAM information is said SM extremely;
9. according to claim 6,7 or 8 described systems, it is characterized in that said NS comprises:
Memory cell is preserved programme and performance recording list; Said performance recording list comprises the performance recording result of program recording, and said performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to recorded program;
Record trigger element,,, trigger the program that comprises in the CDN program recording list, with the performance recording of CDN feedback as a result in the performance recording list of write storage unit through Content Management System CMS and real-time management device RTM according to obtaining the programme request;
Matching unit; The channel and the programm name of the program that comprises according to the programme corresponding with obtaining the programme request; From the performance recording list of memory cell, obtain with programme in the channel program recording identical of program with programm name, and send to the first optimization unit;
The first optimization unit; In the performance recording list according to the memory cell preservation; Whether what the performance recording result of program recording comprised records the identification information of success in order to recorded program; Judge that when said program recording was recorded failure, program that will be corresponding with said program recording was rejected from the programme of Portal request, export the programme after rejecting to Portal as the programme after optimizing.
10. according to claim 6,7 or 8 described systems, it is characterized in that said NS comprises:
Memory cell is preserved programme and performance recording list; Said performance recording list comprises the performance recording result of program recording, and said performance recording result comprises the channel of program start time, program end time, program at least and whether records the identification information of success in order to recorded program;
Record trigger element,,, trigger the program that comprises in the CDN program recording list, with the performance recording of CDN feedback as a result in the performance recording list of write storage unit through Content Management System CMS and real-time management device RTM according to obtaining the programme request;
Matching unit; The channel and the programm name of the program that comprises according to the programme corresponding with obtaining the programme request; From the performance recording list of memory cell, obtain with programme in the channel program recording identical of program with programm name, and send to the second optimization unit;
The second optimization unit; In the performance recording list according to the memory cell preservation; Whether what the performance recording result of program recording comprised records the identification information of success in order to recorded program; Judge when said program recording is recorded failure; According to the program end time that the performance recording result of program recording comprises, the program before the concluding time of program corresponding with the program recording of recording failure in the programme is rejected, with being the initial moment with concluding time of the corresponding program of program recording of recording failure in the programme; The concluding time of corresponding programme is the finish time with the program request time of carrying in the time shift order request, exports the programme between the initial moment to the finish time to Portal as the programme after optimizing.
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