CN102413369B - 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 PDF

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Publication number
CN102413369B
CN102413369B CN201110358547.5A CN201110358547A CN102413369B CN 102413369 B CN102413369 B CN 102413369B CN 201110358547 A CN201110358547 A CN 201110358547A CN 102413369 B CN102413369 B CN 102413369B
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China
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program
programme
recording
time
request
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CN201110358547.5A
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Chinese (zh)
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CN102413369A (en
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屈东
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深圳市龙视传媒有限公司
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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

A kind of order method of digital television time-shifting programs and VOD system

Technical field

The present invention relates to digital television on-demand technology, particularly a kind of order method of digital television time-shifting programs and VOD system.

Background technology

Program request of future generation (Next Generation On Demand Video Architecture, NGOD) is the video-on-demand service framework a set of of new generation of Concast company definition, and the core of framework is video-on-demand service.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 user in live process of watching TV programme, after pressing pause button and leaving, the fragment of the TV programme of watching in the time period that can utilize the playback of rollback button to leave, avoids missing the fragment of the required TV programme of user.

Fig. 1 is the order method flow chart of existing time shift program.Now, in conjunction with Fig. 1, the order method of existing time shift program is described, specific as follows:

Step 101: receiving terminal for digital television (Set-Top Box, STB) sends time shift order request to digital television gateway (Portal);

In this step, STB, as program request client (On Demand Client, ODC), sends to Portal by user's time shift program order request, shifting state while being switched to from live state.

Wherein, in time shift order request, at least comprise the identification information of program request time and program request client, to determine the STB information of time shift program program request and the programme information of program request of carrying out.

Step 102:Portal sends and obtains programme request to navigation server (Navigation Server, NS);

In this step, obtain programme request and at least comprise program request time point, so that NS provides the programme information with the program request time match 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 default N interval time, and acquisition point is the programme of N duration before and after corresponding time point between sowing time, and programme is carried to obtain in programme response sends to Portal.Wherein, NS also further returns and orders token to Portal.

Step 104:Portal generates playing progress bar;

Portal, according to that receive and programme program request time correlation, generates playing progress bar, so that user carries out the time shift program program request operations such as F.F., rewind down.

Step 105:Portal sends RTSP according to real time streaming transport protocol (Real Time Streaming Protocol, RTSP) and goes here and there to STB;

RTSP string in this step at least comprises the address information of ordering token and session manager (Session Manager, SM).

Step 106:STB sends time shifting broadcasting request to SM by RTSP;

In this step, STB, according to RTSP agreement, according to the address information of SM, sends and carries the extremely corresponding SM of time shifting broadcasting request that orders token.Wherein, the channel, programm name and the temporal information that in time shifting broadcasting request, at least comprise the program that carries out time shift program request.

Step 107 is obtained playlist from NS to step 108:SM;

SM is according to channel, programm name and the temporal information of the program carrying in the time shifting broadcasting request receiving, from the performance recording list of NS, obtain programm name information of identical program recording all of the channel of program, utilize the Information generation playlist of program recording.

Wherein, the performance recording list that NS preserves be content distributing network (Content Delivery Network, CDN) to NS feedback by program recording forms list; In this performance recording list, record each program start time, the program end time of program recording, channel of program and whether record successful identification information in order to record this program.

Step 109:SM obtains video server (Streaming Server, SS) information and sends 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 audio-video document that playlist is corresponding from content distributing network CDN; CDN can be in real time according to the connection of network traffics and each node, load state and to integrated informations such as user's distance and response times using user's request, again lead from user nearest on the SS of service node.

Step 111:SS sends to play and responds to SM;

In this step, the audio-video document corresponding with playlist that SS has obtained to SM feedback.

Step 112:SM transmission SS address and edge modulator (IPQAM) information are to STB;

In this step, SM sends in order to carry out the SS address of plug-flow and in order to carry out the IPQAM information of frequency locking to the STB of time-shifting program request program request.

Step 113:STB obtains plug-flow from SS.

In this step, STB, according to SS address, obtains audio/video flow corresponding to time shift program program request.

When user carries out time shift program program request as shown in Figure 1 by STB, CDN, Content Management System (Content Management System, CMS) and real-time management device (Real-Time Manager, RTM) carry out recording of time shift program.

Fig. 2 is the method flow diagram of existing performance recording.Now, in conjunction with Fig. 2, 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 to receive from the obtaining after programme request of Portal at NS, send the programme of time shift program request to CMS, start the flow process of recording of time shift program.

Step 202:CMS sends the programme of time shift program request to RTM;

In this step, CMS can send programme to RTM by 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 time shift program request.

Step 204:RTM generates the plan of recording;

RTM in this step, according to the programme of the time shift program request receiving, generates the plan of recording; Wherein, record and at least comprise in the works time point, duration, channel and the programm name for the treatment of recorded program.

Step 205:RTM sends recording task to CDN;

In this step, the RTM plan of recording that constantly scanning generates, according to recording the broadcast time of program in the works, real-time injection (RTI) network element comprising to CDN by A3.TransferContent interface is submitted recording task to.

Step 206:CDN sends response message to RTM;

In this step, the RTI network element that CDN comprises returns to a response message to RTM, in order to indicate RTM successfully to receive recording task.

Step 207:CDN program recording;

In this step, the RTI network element that CDN comprises receives audio/video flow according to recording task, program recording generating indexes file, skip forward/back file.

Step 208:RTM sends recording state request to CDN;

This step is in the process of the RTI network element program recording that comprises at CDN, and RTM, according to default interval time, sends in order to inquire about the RTI network element to CDN of asking of recording state, specifically can to RTI, ask recording state by A3.GetTransferStatus interface.

Wherein, recording state is that program recording accounts for the percentage for the treatment of 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 recording state request, and according to the situation of program recording, feedback recording state is to RTM.

Step 210:CDN sends performance recording result to RTM;

In this step, CDN passes through A3.TransferContent interface to RTM asynchronous notifications performance recording result; CDN after having completed a performance recording, judges program recording, obtains program recording and whether record successful information.

In this step, performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to record this program.

Step 211:RTM sends performance recording result to CMS;

In this step, RTM is according to the asynchronous notifications message receiving, by NGOD.MTI-A2.ContentStatus interface, to CMS notice performance recording result.

Step 212:CMS writes performance recording result in the performance recording list of NS;

In this step, mutual by with NS of CMS, performance recording result is write in the performance recording list of NS preservation, in other words, by the channel of program start time, program end time, program and in order to record this program, whether record successful identification information and write in the performance recording list that NS preserves.

In the process of CDN program recording, due to the problem of network or information source, may there is the problem of recording failure in CDN institute recorded program, such as there is no normal termination etc., so that program recording cannot normally be used.Based on foregoing, if program corresponding to the playlist that SM asks to CDN by SS according to playlist exists while recording the problem of failure, STB cannot obtain the audio/video flow of the program of its program request from SS, also just cannot 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 programs, the method can be recorded failure in the situation that the program recording corresponding with program in programme exists, and completes 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 programs, this system can be recorded failure in the situation that the program recording corresponding with program in programme exists, and completes the program request of time shift program.

For achieving the above object, technical scheme of the present invention is specifically achieved in that

An order method for digital television time-shifting programs, the method comprises:

A, receiving terminal for digital television send 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 comprising in content distributing network CDN program recording list, whether what according to the performance recording result of the program recording of CDN feedback, comprise records successful identification information in order to recorded program, optimize the programme of Portal request, obtain the programme after optimizing and be sent to Portal;

Programme after C, Portal transmission is optimized and the address of session manager SM are to receiving terminal for digital television;

D, receiving terminal for digital television, according to the programme after optimizing, send time shifting broadcasting request to SM, from SM, obtain video server SS address and edge modulator IPQAM information, from video server SS, obtain plug-flow.

In said method, whether what according to the performance recording result of the program recording of CDN feedback, comprise described in step B records successful identification information in order to recorded program, and the programme of optimizing Portal request comprises:

B1, NS be according to the channel of the program comprising in programme and programm name, obtains the program recording identical with programm name with the channel of program in programme from performance recording list;

B2, according to the performance recording result of the program recording of CDN feedback, comprise in order to recorded program, whether record successful identification information, when described in determination step B 1, program recording has been recorded unsuccessfully, the program corresponding with described program recording rejected from the programme of Portal request to the programme of the programme after rejecting after optimizing.

In said method, whether what according to the performance recording result of the program recording of CDN feedback, comprise described in step B records successful identification information in order to recorded program, and the programme of optimizing Portal request comprises:

B3, NS be according to the channel of the program comprising in programme and programm name, obtains the program recording identical with programm name with the channel of program in programme from performance recording list;

B4, the identification information comprising according to the performance recording result of the program recording of CDN feedback, program recording is recorded failure described in determination step B3;

B5, the basis program end time that the performance recording result of program recording comprises, program before the end time of program corresponding with the program recording of recording failure in programme is rejected, to in programme, be initial time with the end time of recording the corresponding program of program recording of failure, take end time of programme corresponding to program request time of carrying in time shift order request is the finish time, the programme using initial time to the programme between the finish time after optimizing.

In said method, send time shifting broadcasting request described in step D and comprise 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;

The identification information that described programme information at least comprises in performance recording result is to record successfully channel, programm name and the temporal information of the program that program recording is corresponding; Described temporal information is for take the duration information that program request time of carrying in time shift order request advances or retreat as starting point.

In said method, from SM, obtain SS address and IPQAM information comprises described in step D:

SM is according to the time shifting broadcasting request that receives, the playlist after NS obtains the optimization corresponding with programme optimization, and send to SS;

SS obtains with the playlist identification information corresponding, that performance recording result comprises optimization as recording successfully program recording from CDN, and sends SS address and IPQAM information to receiving terminal for digital television by SM.

A VOD system for digital television time-shifting programs, this system comprises:

Receiving terminal for digital television, sends time shift order request to digital television gateway Portal;

Portal, according to time shift order request, sends and obtains programme request to navigation server NS, and the programme after transmission is optimized and the address of session manager SM are to receiving terminal for digital television;

NS, according to obtaining programme request, trigger the program comprising in content distributing network CDN program recording list, according to CDN feedback the performance recording result of program recording comprise in order to recorded program, whether record successful identification information, optimize the programme of Portal request, obtain the programme after optimizing and be sent to Portal;

Receiving terminal for digital television, according to the programme after optimizing and the address of SM, sends time shifting broadcasting request to SM, according to video server SS address and edge modulator IPQAM information, from SS, obtains plug-flow;

SM, according to time shifting broadcasting request, sends SS address and IPQAM information to receiving terminal for digital television.

Preferably, described receiving terminal for digital television, also according to real time streaming transport protocol RTSP, is carried at programme information in time shifting broadcasting request and is sent to SM;

The identification information that described programme information at least comprises in performance recording result is to record successfully channel, programm name and the temporal information of the program that program recording is corresponding; Described temporal information is for take the duration information that program request time of carrying in time shift order request advances or retreat as starting point.

Preferably, described SM is according to time shifting broadcasting request, the playlist after NS obtains the optimization corresponding with programme optimization also, and send to SS;

Described SS also from CDN obtain with optimize playlist identification information corresponding, that performance recording result comprises for recording successfully program recording, transmission SS address and IPQAM information is described SM extremely;

In said system, described NS comprises:

Memory cell, preserves programme and performance recording list; Described performance recording list comprises the performance recording result of program recording, and described performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to recorded program;

Record trigger element, according to obtaining programme request, by Content Management System CMS and real-time management device RTM, trigger the program comprising in CDN program recording list, by the performance recording list of the performance recording result write storage unit of CDN feedback;

Matching unit, channel and the programm name of the program comprising according to the programme corresponding with obtaining programme request, from the performance recording list of memory cell, obtain the program recording identical with programm name with the channel of program in programme, and send to the first optimization unit;

First optimizes unit, in the performance recording list of preserving according to memory cell, whether what the performance recording result of program recording comprised records successful identification information in order to recorded program, when described in judgement, program recording has been recorded unsuccessfully, the program corresponding with described program recording rejected from the programme of Portal request, and the programme of the programme after rejecting after optimizing exports Portal to.

In said system, described NS comprises:

Memory cell, preserves programme and performance recording list; Described performance recording list comprises the performance recording result of program recording, and described performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to recorded program;

Record trigger element, according to obtaining programme request, by Content Management System CMS and real-time management device RTM, trigger the program comprising in CDN program recording list, by the performance recording list of the performance recording result write storage unit of CDN feedback;

Matching unit, channel and the programm name of the program comprising according to the programme corresponding with obtaining programme request, from the performance recording list of memory cell, obtain the program recording identical with programm name with the channel of program in programme, and send to the second optimization unit;

Second optimizes unit, in the performance recording list of preserving according to memory cell, whether what the performance recording result of program recording comprised records successful identification information in order to recorded program, when described in judgement, program recording has been recorded unsuccessfully, according to the program end time that the performance recording result of program recording comprises, program before the end time of program corresponding with the program recording of recording failure in programme is rejected, to in programme, be initial time with the end time of recording the corresponding program of program recording of failure, take end time of programme corresponding to program request time of carrying in time shift order request is the finish time, programme using initial time to the programme between the finish time after optimizing exports Portal to.

As seen from the above technical solutions, the invention provides a kind of order method and VOD system of digital television time-shifting programs, NS is according to the performance recording result of program recording corresponding to the programme of the programme request of obtaining of Portal and CDN feedback, programme to request is optimized, return to programme after optimization to Portal, STB, according to the programme after optimizing, obtains the time shift program that can play from SS.Adopt method and system of the present invention, can record failure in the situation that the program recording corresponding with program in programme exists, complete the program request of time shift program.

Accompanying drawing explanation

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 programs of the present invention.

Fig. 4 is the structural representation of the VOD system embodiment mono-of digital television time-shifting programs of the present invention.

Fig. 5 is the structural representation of the VOD system embodiment bis-of digital television time-shifting programs of the present invention.

Embodiment

For making object of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

The invention provides a kind of order method and VOD system of digital television time-shifting programs, NS is according to the programme request of obtaining of Portal, programme to request is optimized, return to programme after optimization to Portal, STB sends order request to SM according to the programme after optimizing, SM is according to the programme after optimizing, playlist from NS obtains optimization, so that SS is according to the playlist after optimizing, from CDN, obtain the program recording that STB can play, realized in the situation that the program recording corresponding with program in programme exists and recorded failure, complete the program request of time shift program.Optimization to programme of the present invention, that the program in programme corresponding to the program recording of recording failure is rejected from programme, or according to the program recording of recording failure, programme before time point corresponding to the program recording of recording failure is rejected, by the end time of the programme after rejecting, it is initial time, take end time of programme corresponding to program request time of time shift program is the finish time, the programme using initial time to the programme between the finish time after optimizing.

Fig. 3 is the order method flow chart of digital television time-shifting programs of the present invention.Now, in conjunction with Fig. 3, the order method of digital television time-shifting programs of the present invention is described, specific as follows:

Step 301:STB sends time shift order request to Portal;

In this step, STB, as ODC, sends to Portal by user's time shift program order request, shifting state while being switched to from live state.

Wherein, in time shift order request, at least comprise the identification information of program request time and program request client, to determine the STB information of time shift program program request and the programme information of program request of carrying out.

Step 302:Portal sends and obtains programme request to NS;

In this step, obtain programme request and at least comprise the program request time, so that NS provides the programme information with the program request time match 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, receiving from the obtaining after programme request of Portal, triggers the performance recording flow process shown in Fig. 2, obtains the performance recording result of program recording, at this, no longer the method for performance recording is repeated.

The programme that step 303:NS sends after optimizing responds to Portal;

In this step, NS is receiving the obtaining after programme request of Portal, whether what according to the performance recording result of the corresponding performance recording Dan Zhongyi of programme program recording, comprise records successful identification information and is optimized in order to record this program, sends programme after optimizing to Portal.In this step, NS can further send and order token response to Portal.

Wherein, performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to record this program.

Whether what wherein, NS comprised according to the performance recording result of the corresponding performance recording Dan Zhongyi of programme program recording records successful identification information and is optimized and comprises in order to record this program:

NS is according to the channel of the program comprising in programme and programm name, from performance recording list, obtain the program recording identical with programm name with the channel of program in programme, when judging this program recording recorded unsuccessfully according to the identification information that the performance recording result of program recording comprises, program with program recording is corresponding and information thereof are rejected from the programme of Portal request, the programme of programme after rejecting after optimizing

Or NS is according to the channel of the program comprising in programme and programm name, from performance recording list, obtain the program recording identical with programm name with the channel of program in programme, according to the identification information that the performance recording result of program recording comprises, when judging this program recording having been recorded unsuccessfully, according to the program end time that the performance recording result of program recording comprises, program before the end time of program corresponding with the program recording of recording failure in programme is rejected, to in programme, be initial time with the end time of recording the corresponding program of program recording of failure, take end time of programme corresponding to program request time of time shift program is the finish time, programme using initial time to the programme between the finish time after optimizing.

Wherein, the programme after optimization is the time shift program list that NS offers STB.

Step 304:Portal generates playing progress bar;

Portal, according to the programme after that receive and optimization program request time correlation, generates playing progress bar, so that user carries out the time shift program program request operations such as F.F., rewind down.

Step 305:Portal sends RTSP and goes here and there to STB;

RTSP string in this step at least comprises orders the address information of token, SM and the programme after optimization.

Step 306:STB sends time shifting broadcasting request to SM by RTSP;

In this step, STB, according to RTSP agreement, according to the address information of SM, sends and carries the extremely corresponding SM of time shifting broadcasting request that orders token.

Wherein, in time shifting broadcasting request, also comprise programme information; The identification information that programme information at least comprises in performance recording result is to record successfully channel, programm name and the temporal information of the program that program recording is corresponding.Temporal information is for take the duration information that the program request time advances or retreat as starting point.

Step 307:SM sends and obtains playlist request to NS;

SM is according to the programme information in time shifting broadcasting request, in request NS with optimize after playlist corresponding to programme.

Step 308:NS returns to playlist after optimization to SM;

In this step, NS, according to the request of SM, sends to SM by playlist after optimization corresponding to the programme after the optimization in step 303.Wherein, in the playlist after optimization, not comprising identification information is the programme information of recording the program that the program recording of failure is corresponding.

Step 309:SM obtain SS information and send to optimize after playlist to SS;

This step can adopt in Fig. 1 109 method, just the playlist after the optimization receiving is sent to SS.

The program recording that the playlist of step 310:SS from CDN obtains optimization is corresponding;

In playlist after the optimization of obtaining in this step, do not comprise identification information and be the programme information of recording the program that the program recording of failure is corresponding, so just can guarantee to obtain from SS the audio/video flow that the STB of plug-flow can normal play receives.

Step 311 is identical to the method for step 113 with this step 111 of Fig. 1 to the method for step 313, does not repeat them here.

Fig. 4 is the structural representation of the VOD system embodiment mono-of digital television time-shifting programs of the present invention.Now, in conjunction with Fig. 4, the VOD system of the digital television time-shifting programs of embodiment mono-is described, specific as follows:

The VOD system of digital television time-shifting programs of the present invention comprises: STB401, Portal402, NS403, SM404, SS405 and CDN406.

STB401 sends time shift order request to Portal402.Wherein, the identification information that at least comprises program request time and program request client in time shift order request.

Portal402, according to time shift order request, sends and obtains programme request to NS403, and the programme after transmission is optimized and the address of SM are to STB401.Wherein, obtain programme request and at least comprise the program request time, so that NS403 provides the programme information with the program request time match of time shift program request.

NS403 is according to obtaining programme request, the program comprising in CDN406 program recording list, whether what according to the performance recording result of the program recording of CDN406 feedback, comprise records successful identification information in order to recorded program, optimize the programme of Portal402 request, obtain the programme after optimizing and be sent to Portal402.Wherein, performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to record this program.

STB401, according to the programme after optimizing and the address of SM, sends time shifting broadcasting request to SM404, according to SS address and IPQAM information, from SS405, obtains plug-flow.Particularly, STB401, according to real time streaming transport protocol RTSP, is carried at programme information in time shifting broadcasting request and is sent to SM404.Wherein, at least to comprise the identification information in performance recording result be to record successfully channel, programm name and the temporal information of the program that program recording is corresponding to programme information; Temporal information is for take the duration information that program request time of carrying in time shift order request advances or retreat as starting point.

SM404, according to time shifting broadcasting request, sends SS address and IPQAM information to STB401.Particularly, SM404 is according to time shifting broadcasting request, the playlist after NS403 obtains the optimization corresponding with programme optimization, and send to SS405; SS405 from CDN406 obtain with optimize playlist identification information corresponding, that performance recording result comprises for recording successfully program recording, 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 first and optimize unit 4034.

Memory cell 4031 is preserved programme and performance recording list.Wherein, performance recording list comprises the performance recording result of program recording; Performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to recorded program.

Record trigger element 4032 according to obtaining programme request, by CMS (not shown in Fig. 4) and RTM (not shown in Fig. 4), trigger the program comprising in CDN406 program recording list, by the performance recording list of the performance recording result write storage unit 4033 of CDN406 feedback.

Channel and the programm name of the program that matching unit 4033 comprises according to the programme corresponding with obtaining programme request, from the performance recording list of memory cell 4031, obtain the program recording identical with programm name with the channel of program in programme, and send to the first optimization unit 4034.

First optimizes in the performance recording list of preserving according to memory cell 4031 unit 4034, whether what the performance recording result of program recording comprised records successful identification information in order to recorded program, judge when program recording is recorded unsuccessfully, program with program recording is corresponding is rejected from the programme of Portal402 request, the programme of programme after rejecting after optimizing exports Portal402 to, and the programme after optimizing is saved in memory cell 4033.

Fig. 5 is the structural representation of the VOD system embodiment bis-of digital television time-shifting programs of the present invention.The system configuration of the system configuration of embodiment bis-shown in Fig. 5 and the embodiment mono-shown in Fig. 4 is different is that the structure of NS403 is different, and other structures are identical with the structure of embodiment mono-, do not repeat them here.

The NS403 of the present embodiment comprises: memory cell 4031, record trigger element 4032, matching unit 4033 and second and optimize unit 4035.

Memory cell 4031 is preserved programme and performance recording list.Wherein, performance recording list comprises the performance recording result of program recording; Performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to recorded program.

Record trigger element 4032 according to obtaining programme request, by CMS (not shown in Fig. 4) and RTM (not shown in Fig. 4), trigger the program comprising in CDN406 program recording list, by the performance recording list of the performance recording result write storage unit 4033 of CDN406 feedback.

Channel and the programm name of the program that matching unit 4033 comprises according to the programme corresponding with obtaining programme request, from the performance recording list of memory cell 4031, obtain the program recording identical with programm name with the channel of program in programme, and send to the second optimization unit 4035.

Second optimizes in the performance recording list of preserving according to memory cell 4031 unit 4035, whether what the performance recording result of program recording comprised records successful identification information in order to recorded program, judge when program recording is recorded unsuccessfully, according to the program end time that the performance recording result of program recording comprises, program before the end time of program corresponding with the program recording of recording failure in programme is rejected, to in programme, be initial time with the end time of recording the corresponding program of program recording of failure, take end time of programme corresponding to program request time of carrying in time shift order request is the finish time, programme using initial time to the programme between the finish time after optimizing exports Portal402 to, and the programme after optimizing is saved in memory cell 4033.

In above-mentioned preferred embodiment of the present invention, when NS obtains the programme of programme request feedback to Portal in basis, according to the programme generating when the program recording, record result, programme to request is optimized, from the programme of request, rejecting the identification information that performance recording result comprises is corresponding program and the information thereof of program recording of recording failure, the programme information that feedback can normally be watched is to Portal, while obtaining program recording so that follow-up according to playlist corresponding to programme after optimizing, the program recording that acquisition can be play, avoided recording the problem of the program request failure of the time shift program that unsuccessfully caused.

In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. an order method for digital television time-shifting programs, is characterized in that, the method comprises:
A, receiving terminal for digital television send 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 comprising in content distributing network CDN program recording list, whether what according to the performance recording result of the program recording of CDN feedback, comprise records successful identification information in order to recorded program, optimize the programme of Portal request, obtain the programme after optimizing and be sent to Portal;
Wherein, described " described according to the performance recording result of the program recording of CDN feedback, comprise in order to recorded program, whether record successful identification information; optimize the programme of Portal request " comprising: " B1, NS be according to the channel of the program comprising in programme and programm name, obtains the program recording identical with programm name with the channel of program in programme from performance recording list; B2, according to the performance recording result of the program recording of CDN feedback, comprise in order to recorded program, whether record successful identification information, when described in determination step B1, program recording has been recorded unsuccessfully, the program corresponding with described program recording rejected from the programme of Portal request to the programme of the programme after rejecting after optimizing "; Or,
Described " described according to the performance recording result of the program recording of CDN feedback, comprise in order to recorded program, whether record successful identification information; optimize the programme of Portal request " comprising: " B3, NS be according to the channel of the program comprising in programme and programm name, obtains the program recording identical with programm name with the channel of program in programme from performance recording list; B4, the identification information comprising according to the performance recording result of the program recording of CDN feedback, program recording is recorded failure described in determination step B3; B5, the basis program end time that the performance recording result of program recording comprises, program before the end time of program corresponding with the program recording of recording failure in programme is rejected, to in programme, be initial time with the end time of recording the corresponding program of program recording of failure, take end time of programme corresponding to program request time of carrying in time shift order request is the finish time, the programme using initial time to the programme between the finish time after optimizing ";
Programme after C, Portal transmission is optimized and the address of session manager SM are to receiving terminal for digital television;
D, receiving terminal for digital television, according to the programme after optimizing, send time shifting broadcasting request to SM, from SM, obtain video server SS address and edge modulator IPQAM information, from video server SS, obtain plug-flow.
2. method according to claim 1, is characterized in that, sends time shifting broadcasting request described in step D and 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;
The identification information that described programme information at least comprises in performance recording result is to record successfully channel, programm name and the temporal information of the program that program recording is corresponding; Described temporal information is for take the duration information that program request time of carrying in time shift order request advances or retreat as starting point.
3. method according to claim 1, is characterized in that, obtains SS address and IPQAM information comprises described in step D from SM:
SM is according to the time shifting broadcasting request that receives, the playlist after NS obtains the optimization corresponding with programme optimization, and send to SS;
SS obtains with the playlist identification information corresponding, that performance recording result comprises optimization as recording successfully program recording from CDN, and sends SS address and IPQAM information to receiving terminal for digital television by SM.
4. a VOD system for digital television time-shifting programs, is characterized in that, this system comprises:
Receiving terminal for digital television, sends time shift order request to digital television gateway Portal;
Portal, according to time shift order request, sends and obtains programme request to navigation server NS, and the programme after transmission is optimized and the address of session manager SM are to receiving terminal for digital television;
NS, according to obtaining programme request, trigger the program comprising in content distributing network CDN program recording list, according to CDN feedback the performance recording result of program recording comprise in order to recorded program, whether record successful identification information, optimize the programme of Portal request, obtain the programme after optimizing and be sent to Portal;
Wherein, described NS comprises: " memory cell, preserves programme and performance recording list; Described performance recording list comprises the performance recording result of program recording, and described performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to recorded program; Record trigger element, according to obtaining programme request, by Content Management System CMS and real-time management device RTM, trigger the program comprising in CDN program recording list, by the performance recording list of the performance recording result write storage unit of CDN feedback; Matching unit, channel and the programm name of the program comprising according to the programme corresponding with obtaining programme request, from the performance recording list of memory cell, obtain the program recording identical with programm name with the channel of program in programme, and send to the first optimization unit; First optimizes unit, in the performance recording list of preserving according to memory cell, whether what the performance recording result of program recording comprised records successful identification information in order to recorded program, when described in judgement, program recording has been recorded unsuccessfully, the program corresponding with described program recording rejected from the programme of Portal request, and the programme of the programme after rejecting after optimizing exports Portal to "; Or,
Described NS comprises: " memory cell, preserves programme and performance recording list, described performance recording list comprises the performance recording result of program recording, and described performance recording result at least comprises the channel of program start time, program end time, program and whether records successful identification information in order to recorded program, record trigger element, according to obtaining programme request, by Content Management System CMS and real-time management device RTM, trigger the program comprising in CDN program recording list, by the performance recording list of the performance recording result write storage unit of CDN feedback, matching unit, channel and the programm name of the program comprising according to the programme corresponding with obtaining programme request, from the performance recording list of memory cell, obtain the program recording identical with programm name with the channel of program in programme, and send to the second optimization unit, second optimizes unit, in the performance recording list of preserving according to memory cell, whether what the performance recording result of program recording comprised records successful identification information in order to recorded program, when described in judgement, program recording has been recorded unsuccessfully, according to the program end time that the performance recording result of program recording comprises, program before the end time of program corresponding with the program recording of recording failure in programme is rejected, to in programme, be initial time with the end time of recording the corresponding program of program recording of failure, take end time of programme corresponding to program request time of carrying in time shift order request is the finish time, programme using initial time to the programme between the finish time after optimizing exports Portal to ",
Receiving terminal for digital television, according to the programme after optimizing and the address of SM, sends time shifting broadcasting request to SM, according to video server SS address and edge modulator IPQAM information, from SS, obtains plug-flow;
SM, according to time shifting broadcasting request, sends SS address and IPQAM information to receiving terminal for digital television.
5. system according to claim 4, is characterized in that, described receiving terminal for digital television, also according to real time streaming transport protocol RTSP, is carried at programme information in time shifting broadcasting request and is sent to SM;
The identification information that described programme information at least comprises in performance recording result is to record successfully channel, programm name and the temporal information of the program that program recording is corresponding; Described temporal information is for take the duration information that program request time of carrying in time shift order request advances or retreat as starting point.
6. system according to claim 4, is characterized in that, described SM is according to time shifting broadcasting request, the playlist after NS obtains the optimization corresponding with programme optimization also, and send to SS;
Described SS also from CDN obtain with optimize playlist identification information corresponding, that performance recording result comprises for recording successfully program recording, transmission SS address and IPQAM information is described SM extremely.
CN201110358547.5A 2011-11-14 2011-11-14 On-demand method and on-demand system of digital television time-shifting programs CN102413369B (en)

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