CN102905174B - A kind of shared method of Transport Stream - Google Patents

A kind of shared method of Transport Stream Download PDF

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Publication number
CN102905174B
CN102905174B CN201210332151.8A CN201210332151A CN102905174B CN 102905174 B CN102905174 B CN 102905174B CN 201210332151 A CN201210332151 A CN 201210332151A CN 102905174 B CN102905174 B CN 102905174B
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transport stream
identifier
packet identifier
pid
sharing request
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CN102905174A (en
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陈鹏
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Shenzhen Skyworth Digital Technology Co Ltd
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Shenzhen Skyworth Digital Technology Co Ltd
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Priority to PCT/CN2013/080704 priority patent/WO2014036873A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists

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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention discloses a kind of shared method of Transport Stream. The method comprises: receiving sharing request, sharing request comprises PID Packet Identifier; Send transport stream data packet corresponding with PID Packet Identifier in Transport Stream. By the way, the present invention only sends transport stream data packet corresponding with the PID Packet Identifier in sharing request in Transport Stream according to customer need, avoid sending other unnecessary transport stream data packet, it is possible to while saving the network bandwidth, realize effectively sharing Transport Stream.

Description

A kind of shared method of Transport Stream
Technical field
The present invention relates to communication technical field, particularly relate to a kind of shared method of Transport Stream.
Background technology
Along with the function of Set Top Box is more and more abundanter, people are except watching digital television program with Set Top Box, it is also possible to obtaining other function a lot, recording function is exactly one of them. When using recording function, the program recorded automatically can generate a Transport Stream (TS) and store. User can be called the Transport Stream recorded at any time and watch by Set Top Box. Such as, if the Transport Stream recorded needs to watch on other equipment: PC, mobile phone etc., it is possible to adopt and Transport Stream directly shared by network, and the mode accessed by other device downloads is watched. Transport Stream owing to recording generally includes the information of multiple program, and its data volume is very huge, so adopting aforesaid way, can consume a large amount of bandwidth, the waste causing resource very big.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of shared method of Transport Stream, to realize effectively sharing Transport Stream while saving the network bandwidth.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of shared method providing Transport Stream, and this shared method comprises: receiving sharing request, sharing request comprises PID Packet Identifier; Send transport stream data packet corresponding with PID Packet Identifier in Transport Stream.
Wherein, the step sending transport stream data packet corresponding with PID Packet Identifier in Transport Stream comprises: what send that the indexed file corresponding according to PID Packet Identifier extract from Transport Stream offsets corresponding transport stream data packet with the position in indexed file, indexed file by being that Transport Stream is carried out resolving and obtains by distinguishing identifier taking PID Packet Identifier, the transport stream data packet that indexed file comprises PID Packet Identifier and comprises PID Packet Identifier position skew in the transport stream.
Wherein, indexed file comprises the very first time stamp of transport stream data packet further, and sharing request comprises the 2nd time stamp further; The step sending transport stream data packet corresponding with PID Packet Identifier in Transport Stream comprises: send the transport stream data packet that the corresponding and very first time stamp with position skew extracted from Transport Stream according to indexed file equaled and is later than the 2nd time and stabs.
Wherein, PID Packet Identifier is any one in program contingency table, program map table, video, audio frequency or captions or the PID Packet Identifier of combination.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of shared method providing Transport Stream, and this shared method comprises: sending sharing request, sharing request comprises PID Packet Identifier; Receive transport stream data packet corresponding with PID Packet Identifier in Transport Stream.
Wherein, the step receiving transport stream data packet corresponding with PID Packet Identifier in Transport Stream comprises: what receive that the indexed file corresponding according to PID Packet Identifier extract from Transport Stream offsets corresponding transport stream data packet with the position in indexed file, indexed file by being that Transport Stream is carried out resolving and obtains by distinguishing identifier taking PID Packet Identifier, the transport stream data packet that indexed file comprises PID Packet Identifier and comprises PID Packet Identifier position skew in the transport stream.
Wherein, indexed file comprises the very first time stamp of transport stream data packet further, and sharing request comprises the 2nd time stamp further; The step receiving transport stream data packet corresponding with PID Packet Identifier in Transport Stream comprises: receive the transport stream data packet that the corresponding and very first time stamp with position skew extracted from Transport Stream according to indexed file equaled and is later than the 2nd time and stabs.
Wherein, PID Packet Identifier is any one in program contingency table, program map table, video, audio frequency or captions or the PID Packet Identifier of combination.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is: a kind of shared method providing Transport Stream, and this shared method comprises: receive the first sharing request, and the first sharing request comprises program contingency table PID Packet Identifier; Sending the first transport stream data packet corresponding with program contingency table PID Packet Identifier in Transport Stream, the first transport stream data packet comprises program map table PID Packet Identifier; Receiving the 2nd sharing request, the 2nd sharing request comprises the program map table PID Packet Identifier selected through user; Sending the 2nd transport stream data packet corresponding with the program map table PID Packet Identifier in the 2nd sharing request in Transport Stream, the 2nd transport stream data packet comprises audio pack identifier, video packets identifier or captions PID Packet Identifier; Receiving the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions PID Packet Identifier selected through user; Send the 3rd transport stream data packet corresponding with the audio pack identifier in the 3rd sharing request, video packets identifier or captions PID Packet Identifier in Transport Stream.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is: a kind of shared method providing Transport Stream, and this shared method comprises: send the first sharing request, and the first sharing request comprises program contingency table PID Packet Identifier; Receiving the first transport stream data packet corresponding with program contingency table PID Packet Identifier in Transport Stream, the first transport stream data packet comprises program map table PID Packet Identifier; Sending the 2nd sharing request, the 2nd sharing request comprises the program map table PID Packet Identifier selected through user; Receiving the 2nd transport stream data packet corresponding with the program map table PID Packet Identifier in the 2nd sharing request in Transport Stream, the 2nd transport stream data packet comprises audio pack identifier, video packets identifier or captions PID Packet Identifier; Sending the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions PID Packet Identifier selected through user; Receive the 3rd transport stream data packet corresponding with the audio pack identifier in the 3rd sharing request, video packets identifier or captions PID Packet Identifier in Transport Stream.
The invention has the beneficial effects as follows: compared with prior art, the shared method of Transport Stream of the present invention take PID Packet Identifier as distinguishing identifier, transport stream data packet corresponding with the PID Packet Identifier in sharing request in Transport Stream is only sent according to customer need, avoid sending other unnecessary transport stream data packet, it is possible to while saving the network bandwidth, realize effectively sharing Transport Stream.
Accompanying drawing explanation
Fig. 1 is the schema of the shared method of the Transport Stream of first embodiment of the invention;
Fig. 2 is the schema of the shared method of the Transport Stream of second embodiment of the invention;
Fig. 3 is the schema of the shared method of the Transport Stream of third embodiment of the invention; And
Fig. 4 is the schema of the shared method of the Transport Stream of fourth embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The system framework that the shared method of Transport Stream disclosed by the invention adopts comprises server end and client terminal, and server end and client terminal transmit data mutually by network. Server end stores the Transport Stream and indexed file prerecorded. Wherein, server end can be Set Top Box etc., and client terminal can be PC, mobile phone, TV or panel computer etc.
As known to those skilled, transport stream packets contains multiple programme information, is made up of multiple transport stream data packet. Each transport stream data packet is 188 bytes. The structure of Transport Stream is as follows:
Transport stream data packet comprises stem and useful load. Wherein, stem is 32 bit data, comprise 8 bit synchronization bytes, 1 transmission mistake telltale, 1 useful load telltale, 1 transmit priority, 13 PID Packet Identifiers, 2 transmit deciphering control, 2 adapt to field control, 4 continuous counter devices and optionally adapt to field. Useful load part comprises the special information of program and the basic stream through packing. Wherein, through packing basic stream comprise the time stamp. The structure of transport stream data packet is as follows:
Stem Useful load
The structure of the stem of transport stream data packet is as follows:
In the present invention, indexed file is by taking PID Packet Identifier as distinguishing identifier, and Transport Stream carries out what parsing obtained. A corresponding indexed file can be produced for each PID Packet Identifier. The transport stream data packet that indexed file comprises PID Packet Identifier and comprises this PID Packet Identifier position skew in the transport stream. Further, indexed file can also comprise the time stamp of the transport stream data packet self comprising this PID Packet Identifier. Indexed file can adopt XML format or other any appropriate formats to store.
Such as, the indexed file taking PID Packet Identifier as " 1 " is specifically described, and the indexed file that PID Packet Identifier is " 1 " is as follows:
Wherein:
Pid=" PID Packet Identifier that 1 �� represents transport stream data packet corresponding to this indexed file is " 1 ";
Offset represents PID Packet Identifier for " transport stream data packet of 1 �� position in the transport stream offsets, and data " 0 ", " 564 ", " 1880 " and " 3008 " etc. represent that PID Packet Identifier is the real offset of transport stream data packet relative to Transport Stream starting position of " 1 ";
Pts represents the time stamp of transport stream data packet self, and data " 20000 ", " 40000 ", " 60000 " and " 80000 " etc. can be that " the useful load extracting section of the transport stream data packet of 1 �� obtains from PID Packet Identifier.
Fig. 1 is the schema of the shared method of the Transport Stream of first embodiment of the invention. As shown in Figure 1, the shared method of the Transport Stream of the present embodiment is described for server end, specifically comprises the steps:
Step S101: receiving sharing request, this sharing request comprises PID Packet Identifier;
Server end, after receiving sharing request, extracts PID Packet Identifier from sharing request. In a preferred embodiment, server end can be shared according to following sharing request rule:
Server_url/ts_file_name/pid_xxx.ts
Wherein, Server_url represents server url, and Ts_file_name represents the filename of shared Transport Stream, and Pid_xxx.ts then represents that PID Packet Identifier is the transport stream data packet of xxx.
Such as, sharing request " http: // 192.168.11.123/dvbts/cctv5/pid_0.ts " just represents that user's request is shared in http: the PID Packet Identifier in the Transport Stream of the file stored under // 192.168.11.123/dvbts address cctv5 by name is the transport stream data packet of 0.
Step S102: send transport stream data packet corresponding with PID Packet Identifier in Transport Stream.
Server end, after extracting PID Packet Identifier, accesses the indexed file that PID Packet Identifier is corresponding. According to the position skew access transport stream in indexed file, extract and offset corresponding all transport stream data packet with position, and be sequentially sent to client terminal. The concrete structure of indexed file and acquisition methods are above being described in detail, and do not repeat them here.
Further, sharing request can also comprise time stamp. Now, server end, after extracting this time stamp further, sends the transport stream data packet that and himself time corresponding with position skew wherein extracted from Transport Stream according to indexed file stabs the time stamp equaled and be later than in sharing request. Specifically, the indexed file that server end access PID Packet Identifier is corresponding, the all positions inquiring about the time stamp that himself time stamp equals and is later than in sharing request in indexed file offset, access transport stream is offset according to this position, thus extract and offset corresponding transport stream data packet with this position, and sequentially it is sent to client terminal.
Such as: when the PID Packet Identifier in the sharing request that server end receives is " 1 ", when time stamp is for " 40000 ", server end access PID Packet Identifier be " indexed file of 1 ��; obtain that the position skew that himself time stamp is later than " 40000 " is " 564 ", " 1880 " and " 3008 " etc.; and then extract and offset corresponding transport stream data packet with above-mentioned position, and sequentially it is sent to client terminal.
Wherein, the PID Packet Identifier in sharing request is any one in program contingency table, program map table, video, audio frequency or captions or the PID Packet Identifier of combination.
Fig. 2 is the schema of the shared method of the Transport Stream of second embodiment of the invention, and as shown in Figure 2, the shared method of the Transport Stream of the present embodiment is described for client terminal, specifically comprises the steps:
Step S201: sending sharing request, this sharing request comprises PID Packet Identifier;
Step S202: receive transport stream data packet corresponding with PID Packet Identifier in Transport Stream.
Specifically, client terminal offsets corresponding transport stream data packet from what the server end reception indexed file corresponding according to PID Packet Identifier extracted from Transport Stream with the position in indexed file.
Further, sharing request can also comprise time stamp. Now, client terminal receives the transport stream data packet that and himself time corresponding with position skew wherein extracted from Transport Stream according to indexed file stabs the time stamp equaled and be later than in sharing request from server end.
The extracting mode of sharing request in the present embodiment, indexed file and transport stream data packet is identical with the first embodiment, does not repeat them here.
Fig. 3 is the schema of the shared method of the Transport Stream of third embodiment of the invention, and as shown in Figure 3, the shared method of the Transport Stream of the present embodiment is described for the concrete program of server end and program request, specifically comprises the steps:
Step S301: receive the first sharing request, the first sharing request comprises program contingency table PID Packet Identifier;
Server end, after receiving the first sharing request, extracts program contingency table PID Packet Identifier from the first sharing request. In general, the program contingency table PID Packet Identifier in Transport Stream is fixing, and is generally 0.
Step S302: send the first transport stream data packet corresponding with program contingency table PID Packet Identifier in Transport Stream;
Now, the indexed file that server end access is corresponding with program contingency table PID Packet Identifier, also namely PID Packet Identifier is the indexed file of 0. Extract the transport stream data packet (that is, the first transport stream data packet) of program contingency table from Transport Stream according to the position skew in indexed file, the transport stream data packet sending program contingency table is to client terminal. The transport stream data packet of program contingency table comprises the program map table PID Packet Identifier of all programs that Transport Stream comprises, such as:
Program 1:program_number=0x6e92, program_map_pid=0x012c;
Program 2:program_number=0x6e93, program_map_pid=0x0190;
Program 3:program_number=0x6e94, program_map_pid=0x01f4;
Program 4:program_number=0x6e95, program_map_pid=0x0258;
Program 5:program_number=0x6e96, program_map_pid=0x02bc.
Wherein, program_number represents program number, for the program represented in Transport Stream; Program_map_pid represents program map table PID Packet Identifier corresponding to this program.
Step S303: receive the 2nd sharing request, the 2nd sharing request comprises the program map table PID Packet Identifier selected through user;
In this step, the multiple program map table PID Packet Identifiers comprised in the transport stream data packet of program contingency table are selected by user, it is determined that oneself want the program of viewing, and be contained in the 2nd sharing request by the program map table PID Packet Identifier of correspondence. Such as: assume that user selects to watch program 3, then the 2nd sharing request sent comprises the program map table PID Packet Identifier 0x01f4 of program 3 correspondence.
Step S304: send the 2nd transport stream data packet corresponding with the program map table PID Packet Identifier in the 2nd sharing request in Transport Stream;
The indexed file that server end access is corresponding with the program map table PID Packet Identifier in the 2nd sharing request, such as PID Packet Identifier is the indexed file of 0x01f4. Subsequently, extracting the transport stream data packet (that is, the 2nd defeated stream packets) of program map table from Transport Stream according to the position skew in indexed file, the transport stream data packet sending program map table is to client terminal. The transport stream data packet of program map table comprises the audio pack identifier of corresponding program, video packets identifier or captions PID Packet Identifier, such as:
Video 1:video_pid=0x022a;
Audio frequency 1:audio_pid=0x022b;
Audio frequency 2:audio_pid=0x022c;
Captions 1:subtitle_pid=0x022d;
Captions 2:subtitle_pid=0x022e.
Wherein, video_pid represents video packets identifier, and audio_pid represents audio pack identifier subtitle_pid and represents captions PID Packet Identifier.
Step S305: receive the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions PID Packet Identifier selected through user;
In this step, the audio pack identifier in the transport stream data packet of program map table, video packets identifier or captions PID Packet Identifier are selected by user, to determine video, audio frequency or the captions oneself wanting to watch. Such as, user selects viewing video 1, audio frequency 1 and captions 1, then the 3rd sharing request then needs to comprise video packets identifier 0x022a, audio pack identifier 0x022b and captions PID Packet Identifier 0x022d.
Step S306: send the 3rd transport stream data packet corresponding with the audio pack identifier in the 3rd sharing request, video identifier or caption identifier in Transport Stream.
The indexed file that server end access is corresponding with the audio identifiers in the 3rd sharing request, video identifier or caption identifier, such as PID Packet Identifier is respectively the indexed file of 0x022a, 0x022b and 0x022d. Subsequently, the transport stream data packet extracting audio frequency, video or captions from Transport Stream according to the position skew in indexed file is (namely, 3rd transport stream data packet), send audio frequency, video or captions transport stream data packet to client terminal, client terminal by running above-mentioned transport stream data packet can watch corresponding program.
Further, when user may need video, audio frequency or captions to be switched in the process watching program, such as, captions 1 above are switched to captions 2 or audio frequency 1 is switched to audio frequency 2. in the present embodiment, user only need to suspend the broadcasting process of program, send comprises the audio frequency of current operation, the time stamp of the transport stream data packet of video or captions and new video packets identifier, audio pack identifier or captions PID Packet Identifier are (such as, 0x022c or 0x022e) sharing request to server end, server end is then according to new video packets identifier, retrieving files corresponding to audio pack identifier or captions PID Packet Identifier extracts the transport stream data packet that and himself time stamp corresponding with the position skew in this retrieving files is later than and time of equaling in above-mentioned sharing request stabs from Transport Stream, and sequentially it is sent to client terminal. thus so that program can continue to play from time-out position, it is not necessary to from the beginning broadcast program.
Fig. 4 is the schema of the shared method of the Transport Stream of fourth embodiment of the invention, and as shown in Figure 4, the shared method of the Transport Stream of the present embodiment is described for the concrete program of client terminal and program request, specifically comprises the steps:
Step S401: send the first sharing request, the first sharing request comprises program contingency table PID Packet Identifier;
Step S402: receiving the first transport stream data packet corresponding with program contingency table PID Packet Identifier in Transport Stream, this first data packet comprises program map table PID Packet Identifier;
Step S403: send the 2nd sharing request, the 2nd sharing request comprises the program map table PID Packet Identifier selected through user;
Step S404: receiving the 2nd transport stream data packet corresponding with the program map table PID Packet Identifier in the 2nd sharing request in Transport Stream, the 2nd transport stream data packet comprises audio pack identifier, video packets identifier or captions PID Packet Identifier;
Step S405: send the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions PID Packet Identifier selected through user;
Step S406: receive the 3rd transport stream data packet corresponding with the audio pack identifier in the 3rd sharing request, video packets identifier or captions PID Packet Identifier in Transport Stream.
If user needs to be switched to other program, stopping the broadcasting of current program, repeating step S403 to step S406 can play other programs.
In the above-described embodiments, it is all based on indexed file, obtain the transport stream data packet corresponding with the PID Packet Identifier of sharing request, but indexed file is not the prerequisite realizing the object of the invention. Such as, it is possible to by after receiving sharing request and extracting PID Packet Identifier, then as distinguishing mark, Transport Stream is carried out real time parsing taking this PID Packet Identifier, and then obtain the transport stream data packet comprising this PID Packet Identifier.
The invention has the beneficial effects as follows: compared with prior art, the shared method of Transport Stream of the present invention take PID Packet Identifier as distinguishing identifier, transport stream data packet corresponding with the PID Packet Identifier in sharing request in Transport Stream is only sent according to customer need, avoid sending other unnecessary transport stream data packet, it is possible to while saving the network bandwidth, realize effectively sharing Transport Stream.
The foregoing is only embodiments of the present invention; not thereby the patent scope of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all it is included in the scope of patent protection of the present invention with reason.

Claims (6)

1. the shared method of a Transport Stream, it is characterised in that, described shared method comprises:
Receiving sharing request, described sharing request comprises PID Packet Identifier;
Send transport stream data packet corresponding with described PID Packet Identifier in Transport Stream;
The corresponding indexed file of described PID Packet Identifier, described indexed file is resolved by described Transport Stream being carried out by distinguishing identifier of described PID Packet Identifier and is obtained, described indexed file comprises described PID Packet Identifier, the described transmit flow data comprising described PID Packet Identifier wraps in the skew of the position in described Transport Stream, and the very first time stamp of described transport stream data packet; Described sharing request comprises the 2nd time stamp further;
The step of transport stream data packet corresponding with described PID Packet Identifier in described transmission Transport Stream comprises:
Send the described transport stream data packet equaling and being later than described 2nd time stamp with described position skew corresponding and described very first time stamp extracted from described Transport Stream according to described indexed file.
2. shared method according to claim 1, it is characterised in that, described PID Packet Identifier is any one in program contingency table, program map table, video, audio frequency or captions or the PID Packet Identifier of combination.
3. the shared method of a Transport Stream, it is characterised in that, described shared method comprises:
Sending sharing request, described sharing request comprises PID Packet Identifier;
Receive transport stream data packet corresponding with described PID Packet Identifier in Transport Stream;
The corresponding indexed file of described PID Packet Identifier, described indexed file is resolved by described Transport Stream being carried out by distinguishing identifier of described PID Packet Identifier and is obtained, described indexed file comprises described PID Packet Identifier, the described transmit flow data comprising described PID Packet Identifier wraps in the skew of the position in described Transport Stream, and the very first time stamp of described transport stream data packet, described sharing request comprises the 2nd time stamp further;
The step of transport stream data packet corresponding with described PID Packet Identifier in described reception Transport Stream comprises:
Receive the described transport stream data packet equaling and being later than described 2nd time stamp with described position skew corresponding and described very first time stamp extracted from described Transport Stream according to described indexed file.
4. shared method according to claim 3, it is characterised in that, described PID Packet Identifier is any one in program contingency table, program map table, video, audio frequency or captions or the PID Packet Identifier of combination.
5. the shared method of a Transport Stream, it is characterised in that, described shared method comprises:
Receiving the first sharing request, described first sharing request comprises program contingency table PID Packet Identifier;
Sending the first transport stream data packet corresponding with described program contingency table PID Packet Identifier in Transport Stream, described first transport stream data packet comprises program map table PID Packet Identifier;
The corresponding indexed file of described program contingency table PID Packet Identifier, described indexed file is resolved by described Transport Stream being carried out by distinguishing identifier of described PID Packet Identifier and is obtained, described indexed file comprises described PID Packet Identifier, the position skew that described first transmit flow data comprising described PID Packet Identifier wraps in described Transport Stream, and the very first time stamp of described first transport stream data packet; Described first sharing request comprises the 2nd time stamp further;
The step of the first transport stream data packet corresponding with described program contingency table PID Packet Identifier in described transmission Transport Stream comprises:
Send described first transport stream data packet equaling and being later than described 2nd time stamp with described position skew corresponding and described very first time stamp extracted from described Transport Stream according to described indexed file;
Receiving the 2nd sharing request, described 2nd sharing request comprises the described program map table PID Packet Identifier selected through user;
Sending the 2nd transport stream data packet corresponding with the described program map table PID Packet Identifier in described 2nd sharing request in Transport Stream, described 2nd transport stream data packet comprises audio pack identifier, video packets identifier or captions PID Packet Identifier;
Receiving the 3rd sharing request, described 3rd sharing request comprises described audio pack identifier, described video packets identifier or the described captions PID Packet Identifier selected through user;
Send the 3rd transport stream data packet corresponding with the described audio pack identifier in described 3rd sharing request, described video packets identifier or described captions PID Packet Identifier in Transport Stream.
6. the shared method of a Transport Stream, it is characterised in that, described shared method comprises:
Sending the first sharing request, described first sharing request comprises program contingency table PID Packet Identifier;
Receiving the first transport stream data packet corresponding with described program contingency table PID Packet Identifier in Transport Stream, described first transport stream data packet comprises program map table PID Packet Identifier;
The corresponding indexed file of described program contingency table PID Packet Identifier, described indexed file is resolved by described Transport Stream being carried out by distinguishing identifier of described PID Packet Identifier and is obtained, described indexed file comprises described PID Packet Identifier, the position skew that described first transmit flow data comprising described PID Packet Identifier wraps in described Transport Stream, and the very first time stamp of described first transport stream data packet; Described first sharing request comprises the 2nd time stamp further;
The step of the first transport stream data packet corresponding with described PID Packet Identifier in described reception Transport Stream comprises:
Receive described first transport stream data packet equaling and being later than described 2nd time stamp with described position skew corresponding and described very first time stamp extracted from described Transport Stream according to described indexed file;
Sending the 2nd sharing request, described 2nd sharing request comprises the described program map table PID Packet Identifier selected through user;
Receiving the 2nd transport stream data packet corresponding with the described program map table PID Packet Identifier in described 2nd sharing request in Transport Stream, described 2nd transport stream data packet comprises audio pack identifier, video packets identifier or captions PID Packet Identifier;
Sending the 3rd sharing request, described 3rd sharing request comprises described audio pack identifier, described video packets identifier or the described captions PID Packet Identifier selected through user;
Receive the 3rd transport stream data packet corresponding with the described audio pack identifier in described 3rd sharing request, described video packets identifier or described captions PID Packet Identifier in Transport Stream.
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