CN102905174A - Sharing method of transport stream - Google Patents
Sharing method of transport stream Download PDFInfo
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- CN102905174A CN102905174A CN2012103321518A CN201210332151A CN102905174A CN 102905174 A CN102905174 A CN 102905174A CN 2012103321518 A CN2012103321518 A CN 2012103321518A CN 201210332151 A CN201210332151 A CN 201210332151A CN 102905174 A CN102905174 A CN 102905174A
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- transport stream
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- packet identifier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management 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
- H04N21/262—Content 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
Abstract
The invention discloses a sharing method of a transport stream. The sharing method includes receiving a sharing request which includes a packaging identifier and transmitting transport stream data packages in the transport stream corresponding to the packaging identifier. By means of the mode, the sharing method only transmits the transport stream data packages in the transport stream corresponding to the package identifier in the sharing request, avoids transmitting unnecessary transport stream data packages, and achieves effective sharing of the transport stream while saving network bandwidth.
Description
Technical field
The present invention relates to communication technical field, relate in particular 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 can also obtain much other functions except watching the digital television program with set-top box, and recording function is exactly one of them.When using recording function, the program that records can automatically generate a transport stream (TS) and store.The user can call the transport stream that records by set-top box at any time and watch.If the transport stream that records need to be watched at miscellaneous equipment, such as: PC, mobile phone etc., can adopt transport stream is directly shared by network, and be watched by the mode of miscellaneous equipment download access.Because the transport stream of recording generally includes the information of a plurality of programs, its data volume is very huge, so adopt aforesaid way, can consume a large amount of bandwidth, causes the very large waste of resource.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of shared method of transport stream, to realize effectively sharing transport stream in conserve 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 of transport stream is provided, and this shared method comprises: receive sharing request, sharing request comprises Packet Identifier; Send the transport stream data packet corresponding with Packet Identifier in the transport stream.
Wherein, send in the transport stream with the step of transport stream data packet corresponding to Packet Identifier and comprise: send the corresponding transport stream data packet of the position skew with in the index file of from transport stream, extracting according to index file corresponding to Packet Identifier, index file is by resolving acquisition take Packet Identifier as distinguishing identifier to transport stream, and the transmit flow data that index file comprises Packet Identifier and comprises Packet Identifier wraps in the position skew in the transport stream.
Wherein, index file further comprises the very first time stamp of transport stream data packet, and sharing request further comprises the second timestamp; Send in the transport stream with the step of transport stream data packet corresponding to Packet Identifier and comprise: send the transport stream data packet that the corresponding and very first time stamp with the position skew that extracts according to index file equals and be later than the second timestamp from transport stream.
Wherein, Packet Identifier is the Packet Identifier of any one or combination in Program Association Table, Program Map Table, video, audio frequency or the captions.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of shared method of transport stream is provided, and this shared method comprises: send sharing request, sharing request comprises Packet Identifier; Receive the transport stream data packet corresponding with Packet Identifier in the transport stream.
Wherein, receive in the transport stream with the step of transport stream data packet corresponding to Packet Identifier and comprise: receive the corresponding transport stream data packet of the position skew with in the index file of from transport stream, extracting according to index file corresponding to Packet Identifier, index file is by resolving acquisition take Packet Identifier as distinguishing identifier to transport stream, and the transmit flow data that index file comprises Packet Identifier and comprises Packet Identifier wraps in the position skew in the transport stream.
Wherein, index file further comprises the very first time stamp of transport stream data packet, and sharing request further comprises the second timestamp; Receive in the transport stream with the step of transport stream data packet corresponding to Packet Identifier and comprise: receive the transport stream data packet that the corresponding and very first time stamp with the position skew that extracts according to index file equals and be later than the second timestamp from transport stream.
Wherein, Packet Identifier is the Packet Identifier of any one or combination in Program Association Table, Program Map Table, video, audio frequency or the captions.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is: a kind of shared method of transport stream is provided, and this shared method comprises: receive the first sharing request, the first sharing request comprises the Program Association Table Packet Identifier; Send first transport stream data packet corresponding with the Program Association Table Packet Identifier in the transport stream, the first transport stream data packet comprises the Program Map Table Packet Identifier; Receive the second sharing request, the second sharing request comprises the Program Map Table Packet Identifier through user selection; Send second transport stream data packet corresponding with the Program Map Table Packet Identifier in the second sharing request in the transport stream, the second transport stream data packet comprises audio pack identifier, video packets identifier or captions Packet Identifier; Receive the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions Packet Identifier through user selection; Send three transport stream data packet corresponding with audio pack identifier, video packets identifier or captions Packet Identifier in the 3rd sharing request in the 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 of transport stream is provided, and this shared method comprises: send the first sharing request, the first sharing request comprises the Program Association Table Packet Identifier; Receive first transport stream data packet corresponding with the Program Association Table Packet Identifier in the transport stream, the first transport stream data packet comprises the Program Map Table Packet Identifier; Send the second sharing request, the second sharing request comprises the Program Map Table Packet Identifier through user selection; Receive second transport stream data packet corresponding with the Program Map Table Packet Identifier in the second sharing request in the transport stream, the second transport stream data packet comprises audio pack identifier, video packets identifier or captions Packet Identifier; Send the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions Packet Identifier through user selection; Receive three transport stream data packet corresponding with audio pack identifier, video packets identifier or captions Packet Identifier in the 3rd sharing request in the transport stream.
The invention has the beneficial effects as follows: compared with prior art, the shared method of transport stream of the present invention is take Packet Identifier as distinguishing identifier, only send transport stream data packet corresponding with the Packet Identifier in the sharing request in the transport stream according to user's request, avoid sending other unnecessary transport stream data packet, can in conserve network bandwidth, realize effectively sharing transport stream.
Description of drawings
Fig. 1 is the flow chart of shared method of the transport stream of first embodiment of the invention;
Fig. 2 is the flow chart of shared method of the transport stream of second embodiment of the invention;
Fig. 3 is the flow chart of shared method of the transport stream of third embodiment of the invention; And
Fig. 4 is the flow chart of shared method of the transport stream of fourth embodiment of the invention.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
The system architecture that the shared method of transport stream disclosed by the invention adopts comprises server end and client, and server end and client are transmitted data mutually by network.Server end stores transport stream and the index file of prerecording.Wherein, server end can be set-top box etc., and client can be PC, mobile phone, TV or panel computer etc.
As is known to the person skilled in the art, transport stream packets contains a plurality of programme informations, is comprised of a plurality of 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 pay(useful) load.Wherein, stem is 32 bit data, comprise 8 bit synchronization bytes, 1 error of transmission indicating device, 1 pay(useful) load indicating device, 1 transmit priority, 13 Packet Identifier, 2 and transmit deciphering control, 2 and adapt to field control, 4 continuous counters and optionally adapt to field.Pay(useful) load partly comprises Program Specific Information and the Basic Flow through packing.Wherein, the Basic Flow through packing comprises timestamp.The structure of transport stream data packet is as follows:
| Stem | Pay(useful) load |
The structure of the stem of transport stream data packet is as follows:
In the present invention, index file is by take Packet Identifier as distinguishing identifier, and transport stream is resolved acquisition.Can produce the index file of a correspondence for each Packet Identifier.The transmit flow data that index file comprises Packet Identifier and comprises this Packet Identifier wraps in the position skew in the transport stream.Further, index file can also comprise the timestamp of the transport stream data packet self that comprises this Packet Identifier.Index file can adopt XML form or other any appropriate formats to store.
For example, be specifically described take the index file of Packet Identifier as " 1 ", Packet Identifier is that the index file of " 1 " is as follows:
Wherein:
Pid=" Packet Identifier that 1 ＂ represents transport stream data packet corresponding to this index file is " 1 ";
Offset represents Packet Identifier for " transmit flow data of 1 ＂ wraps in the position skew in the transport stream, and the expression Packet Identifier such as data " 0 ", " 564 ", " 1880 " and " 3008 " are that the transport stream data packet of " 1 " is with respect to the real offset of transport stream starting position;
Pts represents the timestamp of transport stream data packet self, and data " 20000 ", " 40000 ", " 60000 " and " 80000 " etc. can be from Packet Identifier for " the pay(useful) load extracting section of the transport stream data packet of 1 ＂ obtain.
Fig. 1 is the flow chart of 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 as an example of server end example, specifically comprises the steps:
Step S101: receive sharing request, this sharing request comprises Packet Identifier;
Server end extracts Packet Identifier from sharing request after receiving 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 the transport stream shared, and Pid_xxx.ts represents that then Packet Identifier is the transport stream data packet of xxx.
For example, sharing request " http: // 192.168.11.123/dvbts/cctv5/pid_0.ts " just represents that the user asks to be shared in http: the Packet Identifier in the transport stream of the file of storing under // 192.168.11.123/dvbts address cctv5 by name is 0 transport stream data packet.
Step S102: send the transport stream data packet corresponding with Packet Identifier in the transport stream.
Server end is accessed index file corresponding to Packet Identifier after extracting Packet Identifier.According to the skew of the position in index file access transport stream, extract all transport stream data packet corresponding with the position skew, and sequentially send to client.Concrete structure and the acquisition methods of index file are described in detail hereinbefore, do not repeat them here.
Further, sharing request can also comprise timestamp.At this moment, server end sends the transport stream data packet that skew corresponding and himself timestamp in position that extract from transport stream according to index file and wherein equals and be later than the timestamp in the sharing request after further extracting this timestamp.Specifically, index file corresponding to server end access Packet Identifier, himself timestamp of inquiry equals and is later than all positions skews of the timestamp in the sharing request in the indexed file, according to this position skew access transport stream, thereby extract the transport stream data packet corresponding with this position skew, and sequentially send to client.
For example: the Packet Identifier in the sharing request that server end receives is " 1 ", when timestamp is " 40000 ", server end access Packet Identifier be " index file of 1 ＂; obtain the position skew that himself timestamp is later than " 40000 " and be " 564 ", " 1880 " and " 3008 " etc.; and then extraction is offset corresponding transport stream data packet with above-mentioned position, and sequentially send to client.
Wherein, the Packet Identifier in the sharing request is the Packet Identifier of any one or combination in Program Association Table, Program Map Table, video, audio frequency or the captions.
Fig. 2 is the flow chart of 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 as an example of client example, specifically comprises the steps:
Step S201: send sharing request, this sharing request comprises Packet Identifier;
Step S202: receive the transport stream data packet corresponding with Packet Identifier in the transport stream.
Particularly, client receives the corresponding transport stream data packet of the position skew with in the index file of extracting according to index file corresponding to Packet Identifier from server end from transport stream.
Further, sharing request can also comprise timestamp.At this moment, client receives the transport stream data packet that skew corresponding and himself timestamp in position that extract from transport stream according to index file and wherein equals and be later than the timestamp in the sharing request from server end.
The extracting mode of the sharing request in the present embodiment, index file and transport stream data packet is identical with the first embodiment, does not repeat them here.
Fig. 3 is the flow chart of 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 specifically comprises the steps: take server end and the concrete program of program request as example is described
Step S301: receive the first sharing request, the first sharing request comprises the Program Association Table Packet Identifier;
Server end extracts the Program Association Table Packet Identifier from the first sharing request after receiving the first sharing request.In general, the Program Association Table Packet Identifier in the transport stream is fixed, and is generally 0.
Step S302: send first transport stream data packet corresponding with the Program Association Table Packet Identifier in the transport stream;
At this moment, the index file that the server end access is corresponding with the Program Association Table Packet Identifier also is that Packet Identifier is 0 index file.From transport stream, extract the transport stream data packet (that is, the first transport stream data packet) of Program Association Table according to the skew of the position in the index file, send the transport stream data packet of Program Association Table to client.The Program Map Table Packet Identifier that comprises all programs that transport stream comprises in the transport stream data packet of Program Association Table, for example:
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, is used for a program of expression transport stream; Program_map_pid represents Program Map Table Packet Identifier corresponding to this program.
Step S303: receive the second sharing request, the second sharing request comprises the Program Map Table Packet Identifier through user selection;
In this step, a plurality of Program Map Table Packet Identifier that comprise in the transport stream data packet of user to Program Association Table are selected, and determine oneself to want the program watched, and the Program Map Table Packet Identifier of correspondence is contained in the second sharing request.For example: suppose that user selection watches program 3, comprise the Program Map Table Packet Identifier 0x01f4 of program 3 correspondences in the second sharing request that then sends.
Step S304: send second transport stream data packet corresponding with the Program Map Table Packet Identifier in the second sharing request in the transport stream;
The index file that the server end access is corresponding with the Program Map Table Packet Identifier in the second sharing request, for example Packet Identifier is the index file of 0x01f4.Subsequently, from transport stream, extract the transport stream data packet (that is, the second defeated stream packets) of Program Map Table according to the skew of the position in the index file, send the transport stream data packet of Program Map Table to client.The audio pack identifier, video packets identifier or the captions Packet Identifier that comprise corresponding program in the transport stream data packet of Program Map Table, for example:
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 the video packets identifier, and audio_pid represents audio pack identifier subtitle_pid and represents the captions Packet Identifier.
Step S305: receive the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions Packet Identifier through user selection;
In this step, the user selects the audio pack identifier in the transport stream data packet of Program Map Table, video packets identifier or captions Packet Identifier, with video, audio frequency or the captions of determining oneself to want to watch.For example, user selection is watched video 1, audio frequency 1 and captions 1, and then the 3rd sharing request then needs to comprise video packets identifier 0x022a, audio pack identifier 0x022b and captions Packet Identifier 0x022d.
Step S306: send three transport stream data packet corresponding with audio pack identifier, video identifier or caption identifier in the 3rd sharing request in the transport stream.
The index file that the server end access is corresponding with audio identifiers, video identifier or caption identifier in the 3rd sharing request, for example Packet Identifier is respectively the index file of 0x022a, 0x022b and 0x022d.Subsequently, the transport stream data packet that extracts audio frequency, video or captions according to the position in index file skew from transport stream (namely, the 3rd transport stream data packet), send the transport stream data packet of audio frequency, video or captions to client, client can be watched corresponding program by moving above-mentioned transport stream data packet.
Further, when the user may need video, audio frequency or captions are switched in watching the process of program, for example captions 1 are above switched to captions 2 or audio frequency 1 is switched to audio frequency 2.In the present embodiment, the user only needs the broadcast process of temporaty suspension, and transmission comprises the audio frequency of current operation, the timestamp of the transport stream data packet of video or captions and new video packets identifier, audio pack identifier or captions Packet Identifier are (for example, 0x022c or 0x022e) sharing request to server end, server end is then according to new video packets identifier, audio pack identifier or the corresponding retrieving files of captions Packet Identifier extract corresponding with the position skew in this retrieving files from transport stream and himself timestamp is later than and equals the transport stream data packet of the timestamp in the above-mentioned sharing request, and sequentially send to client.Thus, so that program can continue to play from suspending the position, need not from the beginning broadcast program.
Fig. 4 is the flow chart of 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 specifically comprises the steps: take client and the concrete program of program request as example is described
Step S401: send the first sharing request, the first sharing request comprises the Program Association Table Packet Identifier;
Step S402: receive first transport stream data packet corresponding with the Program Association Table Packet Identifier in the transport stream, this first packet comprises the Program Map Table Packet Identifier;
Step S403: send the second sharing request, the second sharing request comprises the Program Map Table Packet Identifier through user selection;
Step S404: receive second transport stream data packet corresponding with the Program Map Table Packet Identifier in the second sharing request in the transport stream, this second transport stream data packet comprises audio pack identifier, video packets identifier or captions Packet Identifier;
Step S405: send the 3rd sharing request, the 3rd sharing request comprises audio pack identifier, video packets identifier or the captions Packet Identifier through user selection;
Step S406: receive three transport stream data packet corresponding with audio pack identifier, video packets identifier or captions Packet Identifier in the 3rd sharing request in the transport stream.
If the user need to switch to other program, stop the broadcast of current program, repeating step S403 can play other programs to step S406.
In the above-described embodiments, all be to obtain the transport stream data packet corresponding with the Packet Identifier of sharing request as the basis take index file, yet index file is not the necessary condition that realizes the object of the invention.For example, can carry out real time parsing take this Packet Identifier as separator to transport stream again by after receiving sharing request and extracting Packet Identifier, and then obtain to comprise the transport stream data packet of this Packet Identifier.
The invention has the beneficial effects as follows: compared with prior art, the shared method of transport stream of the present invention is take Packet Identifier as distinguishing identifier, only send transport stream data packet corresponding with the Packet Identifier in the sharing request in the transport stream according to user's request, avoid sending other unnecessary transport stream data packet, can in conserve network bandwidth, realize effectively sharing transport stream.
The above only is embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. the shared method of a transport stream is characterized in that, described shared method comprises:
Receive sharing request, described sharing request comprises Packet Identifier;
Send the transport stream data packet corresponding with described Packet Identifier in the transport stream.
2. shared method according to claim 1 is characterized in that, the step of the transport stream data packet corresponding with described Packet Identifier comprises in the described transmission transport stream:
The corresponding described transport stream data packet of the position skew with in the described index file that transmission is extracted from described transport stream according to index file corresponding to described Packet Identifier, described index file is by resolving acquisition take described Packet Identifier as distinguishing identifier to described transport stream, and the described transmit flow data that described index file comprises described Packet Identifier and comprises described Packet Identifier wraps in the described position skew in the described transport stream.
3. shared method according to claim 2 is characterized in that, described index file further comprises the very first time stamp of described transport stream data packet, and described sharing request further comprises the second timestamp;
The step of the transport stream data packet corresponding with described Packet Identifier comprises in the described transmission transport stream:
The very first time stamp corresponding and described with the skew of described position that transmission is extracted from described transport stream according to described index file equals and is later than the described transport stream data packet of described the second timestamp.
4. shared method according to claim 1 is characterized in that, described Packet Identifier is the Packet Identifier of any one or combination in Program Association Table, Program Map Table, video, audio frequency or the captions.
5. the shared method of a transport stream is characterized in that, described shared method comprises:
Send sharing request, described sharing request comprises Packet Identifier;
Receive the transport stream data packet corresponding with described Packet Identifier in the transport stream.
6. shared method according to claim 5 is characterized in that, the step of the transport stream data packet corresponding with described Packet Identifier comprises in the described reception transport stream:
The corresponding described transport stream data packet of the position skew with in the described index file that reception is extracted from described transport stream according to index file corresponding to described Packet Identifier, described index file is by resolving acquisition take described Packet Identifier as distinguishing identifier to described transport stream, and the described transmit flow data that described index file comprises described Packet Identifier and comprises described Packet Identifier wraps in the described position skew in the described transport stream.
7. shared method according to claim 6 is characterized in that, described index file further comprises the very first time stamp of described transport stream data packet, and described sharing request further comprises the second timestamp;
The step of the transport stream data packet corresponding with described Packet Identifier comprises in the described reception transport stream:
The very first time stamp corresponding and described with the skew of described position that reception is extracted from described transport stream according to described index file equals and is later than the described transport stream data packet of described the second timestamp.
8. shared method according to claim 1 is characterized in that, described Packet Identifier is the Packet Identifier of any one or combination in Program Association Table, Program Map Table, video, audio frequency or the captions.
9. the shared method of a transport stream is characterized in that, described shared method comprises:
Receive the first sharing request, described the first sharing request comprises the Program Association Table Packet Identifier;
Send first transport stream data packet corresponding with described Program Association Table Packet Identifier in the transport stream, described the first transport stream data packet comprises the Program Map Table Packet Identifier;
Receive the second sharing request, described the second sharing request comprises the described Program Map Table Packet Identifier through user selection;
Send second transport stream data packet corresponding with the described Program Map Table Packet Identifier in described the second sharing request in the transport stream, described the second transport stream data packet comprises audio pack identifier, video packets identifier or captions Packet Identifier;
Receive the 3rd sharing request, described the 3rd sharing request comprises the described audio pack identifier through user selection, described video packets identifier or described captions Packet Identifier;
Send three transport stream data packet corresponding with described audio pack identifier, described video packets identifier or described captions Packet Identifier in described the 3rd sharing request in the transport stream.
10. the shared method of a transport stream is characterized in that, described shared method comprises:
Send the first sharing request, described the first sharing request comprises the Program Association Table Packet Identifier;
Receive first transport stream data packet corresponding with described Program Association Table Packet Identifier in the transport stream, described the first transport stream data packet comprises the Program Map Table Packet Identifier;
Send the second sharing request, described the second sharing request comprises the described Program Map Table Packet Identifier through user selection;
Receive second transport stream data packet corresponding with the described Program Map Table Packet Identifier in described the second sharing request in the transport stream, described the second transport stream data packet comprises audio pack identifier, video packets identifier or captions Packet Identifier;
Send the 3rd sharing request, described the 3rd sharing request comprises the described audio pack identifier through user selection, described video packets identifier or described captions Packet Identifier;
Receive three transport stream data packet corresponding with described audio pack identifier, described video packets identifier or described captions Packet Identifier in described the 3rd sharing request in the transport stream.
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| CN201210332151.8A CN102905174B (en) | 2012-09-10 | 2012-09-10 | A kind of shared method of Transport Stream |
| PCT/CN2013/080704 WO2014036873A1 (en) | 2012-09-10 | 2013-08-02 | Method for sharing transport stream |
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| CN201210332151.8A CN102905174B (en) | 2012-09-10 | 2012-09-10 | A kind of shared method of Transport Stream |
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| CN106686400A (en) * | 2016-12-27 | 2017-05-17 | 成都视达科信息技术有限公司 | Multi-screen interaction method and system based on set-top box multipath descrambling |
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| CN102905174B (en) | 2016-06-08 |
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