CN102821306B - A kind of transport stream processing method, relevant apparatus and system - Google Patents
A kind of transport stream processing method, relevant apparatus and system Download PDFInfo
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- CN102821306B CN102821306B CN201210319272.9A CN201210319272A CN102821306B CN 102821306 B CN102821306 B CN 102821306B CN 201210319272 A CN201210319272 A CN 201210319272A CN 102821306 B CN102821306 B CN 102821306B
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Abstract
The embodiment of the invention discloses a kind of transport stream processing method, relevant apparatus and system, switch to the program of the transport stream of other inputs for the quick program by current broadcasting.The method comprises: obtain and store the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting; When receiving the incision request of program of the second transport stream, according to the first pat table and first pmt table of the first transport stream stored, revise the second pat table and second pmt table of the second transport stream; Send the second transport stream having revised the second pat table and the second pmt table.
Description
Technical field
The present invention relates to digital television techniques field, especially relate to a kind of transport stream processing method, conditional receiving device and transport stream treatment system.
Background technology
Along with contacting of television set and network is day by day tight, increasing TV user is not content with and is watched only broadcast program on a television set, but the large high-definition screen curtain of more wishing the video etc. of some other program source to be input to television set shows.
Condition receiving card (CAM, ConditionalAccessModule card) as can by the closely-related product of the personalization of carrier customization, be used to control the one card that user watches the digital television program (containing audio frequency, video, data etc.) through mandate, digital-TV operator can be allowed in television system to carry out authorization control and empowerment management to user by CAM card, thus realize the paid service of digital television program.
Current, common CAM in function as authorized descrambling module, step-by-step the broadcast program sent from main frame is presented broadcasting on a television set, namely first broadcast program is sent into demultiplexing and the deciphering module of CAM card by main frame, returns to main frame again play after processing by the output of CAM card;
, the program source that main frame obtains from CAM card is limited, is difficult to the demand meeting spectators, even if or CAM card has multiple inlet flow, but in practical application scene, such as when user is when watching program, need the TV programme play to be switched to directly from the second transport stream (TS of CAM card input, Transportstream) play, now, the TS stream that interruption main frame sends over by CAM card, replace with the 2nd TS stream, Program Specific Information (PSI entrained by this two-way TS flows, ProgramSpecificInformation) different, direct replacement may cause the program cut not identify, program cannot the problem such as normal play.
Summary of the invention
Embodiments provide a kind of transport stream processing method, relevant apparatus and system, switch to the program of the transport stream of other inputs for the quick program by current broadcasting.
In view of this, the embodiment of the present invention provides respectively:
A kind of transport stream processing method, comprising:
Obtain and store the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
When receiving the incision request of program of the second transport stream, according to the first pat table and first pmt table of the first transport stream of described storage, revise the second pat table and second pmt table of the second transport stream;
Send the second transport stream having revised the second pat table and the second pmt table.
Preferably, the first pat table of described the first transport stream according to described storage and the first pmt table, revise the second pat table and second pmt table of the second transport stream, comprising:
According to the first pat table of the first transport stream of described storage, the second pat table of described second transport stream is replaced with described first pat table;
The identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table;
According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and upgrade the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table.
Preferably, the first pat table of described the first transport stream according to described storage and the first pmt table, revise the second pat table and second pmt table of the second transport stream, comprising:
According to the first pat table of the first transport stream of described storage, the second pat table of described second transport stream is replaced with described first pat table;
According to the first pmt table of the first transport stream of described storage, the second pmt table of described second transport stream is replaced with described first pmt table;
The PID of the audio frequency and video corresponding to program of asking in described second pmt table to cut is revised as the PID of audio frequency and video corresponding to the program of current broadcasting in the first pmt table.
The embodiment of the present invention also provides another kind of transport stream processing method, comprising:
Obtain and store the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
When receiving the incision request of program of the second transport stream, extract the first pat table of the first transport stream of described storage, according to the second pat table of described second transport stream, revise the first pat table of described extraction, and according to the first pat table revised, revise the second pat table of the second transport stream;
According to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream;
Send the second transport stream having revised the second pat table and the second pmt table.
Preferably, the first pat table of the first transport stream of the described storage of described extraction, according to the second pat table of described second transport stream, revises the first pat table of described extraction, and according to the first pat table revised, revises the second pat table of the second transport stream, comprising:
Extract the first pat table of the first transport stream of described storage, according to the second pat table of described second transport stream, the PID of the first corresponding for the program of current broadcasting in the first pat table of described extraction pmt table is revised as in described second pat table the PID of the second pmt table corresponding to program asking to cut, and upgrade the version of described first pat table, and calculate the cyclic redundancy check value of renewal first pat table;
Described second pat table is replaced with the first pat table after amendment renewal;
First pmt table of described the first transport stream according to described storage, revise the second pmt table of the second transport stream, comprising:
According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and calculates the cyclic redundancy check value of renewal second pmt table.
A kind of conditional receiving device, is characterized in that, comprising:
First obtains memory module, for obtaining and storing the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
First processing module, for when receiving the incision request of program of the second transport stream, obtaining the first pat table and first pmt table of the first transport stream that memory module stores, revising the second pat table and second pmt table of the second transport stream according to described first;
First sending module, for sending the second transport stream revising the second pat table and the second pmt table through described first processing module process.
Preferably, the second pat table of described second transport stream, specifically for the first pat table of the first transport stream according to described acquisition memory module storage, is replaced with described first pat table by described first processing module; The identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table; According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and upgrade the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table.
Preferably, the second pat table of described second transport stream, specifically for the first pat table of the first transport stream according to described acquisition memory module storage, is replaced with described first pat table by described first processing module; According to the first pmt table of the first transport stream of described storage, the second pmt table of described second transport stream is replaced with described first pmt table; The PID of the audio frequency and video corresponding to program of asking in described second pmt table to cut is revised as the PID of audio frequency and video corresponding to the program of current broadcasting in the first pmt table.
The embodiment of the present invention also provides another kind of conditional receiving device, comprising:
Second obtains memory module, for obtaining and storing the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
Second processing module, for when receiving the incision request of program of the second transport stream, extract the first pat table that described second obtains the first transport stream that memory module stores, according to the second pat table of described second transport stream, revise the first pat table of described extraction, and according to the first pat table revised, revise the second pat table of the second transport stream; According to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream;
Second sending module, for sending the second transport stream revising the second pat table and the second pmt table through described second processing module process.
Preferably, described second processing module is specifically for extracting the first pat table of the first transport stream of described acquisition memory module storage, according to the second pat table of described second transport stream, the PID of the first corresponding for the program of current broadcasting in the first pat table of described extraction pmt table is revised as in described second pat table the PID of the second pmt table corresponding to program asking to cut, and upgrade the version of described first pat table, and calculate the cyclic redundancy check value of renewal first pat table; Described second pat table is replaced with the first pat table after amendment renewal; According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and calculates the cyclic redundancy check value of renewal second pmt table.
A kind of transport stream treatment system, described system comprises main frame and wherein a kind of conditional receiving device as above, wherein, described main frame, for playing the program of the first transport stream, and receive that described conditional receiving device sends revise the second transport stream of the second pat table and the second pmt table after, revised the program of the request incision of the second transport stream of the second pat table and the second pmt table described in broadcasting.
As can be seen from the above technical solutions, a kind of transport stream processing method, relevant apparatus and system that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, through the process of conditional receiving device, revise the second pat table and second pmt table of the second transport stream, finally make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 shows the flow chart of a kind of transport stream processing method that the embodiment of the present invention provides;
Fig. 2 shows another flow chart of a kind of transport stream processing method that the embodiment of the present invention provides;
Fig. 3 shows another flow chart of a kind of transport stream processing method that the embodiment of the present invention provides;
Fig. 4 shows another flow chart of a kind of transport stream processing method that the embodiment of the present invention provides;
Fig. 5 shows another flow chart of a kind of transport stream processing method that the embodiment of the present invention provides;
Fig. 6 shows the structural representation of a kind of conditional receiving device that the embodiment of the present invention provides;
Fig. 7 shows another structural representation of a kind of conditional receiving device that the embodiment of the present invention provides;
Fig. 8 shows the structural representation of a kind of transport stream treatment system that the embodiment of the present invention provides;
Fig. 9 shows another structural representation of a kind of transport stream treatment system that the embodiment of the present invention provides.
Embodiment
Embodiments provide a kind of transport stream processing method, relevant apparatus and system, switch to the program of the transport stream of other inputs for the quick program by current broadcasting.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below be described in detail respectively.
Please refer to Fig. 1, Fig. 1 shows the flow chart of a kind of transport stream processing method that the embodiment of the present invention provides, and wherein, the method comprises:
Step 101, obtain and store the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
Be understandable that, the embodiment of the present invention relates to switching between transport stream and process, for convenience of description and distinguish, in the embodiment of the present invention, the pat table of the first transport stream is called the first pat table, the pmt table of the first transport stream is called the first pmt table, the pat table of the second transport stream is called the second pat table, the pmt table of the second transport stream is called the second pmt table, do not affect the realization of the present invention program.
Step 102, when receiving the incision request of program of the second transport stream, according to the first pat table and first pmt table of the first transport stream of described storage, revise the second pat table and second pmt table of the second transport stream;
Step 103, transmission have revised the second transport stream of the second pat table and the second pmt table.
Be understandable that, the executive agent of the method can be conditional receiving device, or other are for the device of transport stream process, do not do concrete restriction herein.
In prior art, from information, signal that satellite reception gets off, or the data adding other all will reach MEPG2 code stream according to standard, and the transport stream (TS stream) forming regular length (188 byte) is transmitted; In order to allow TS stream can by Integrated Receive Decoder (IRD, IntegratedReceiverDecoder) normal decoder, need to issue some guidance informations (PSI Program Specific Information) simultaneously, thus the process flowing to concrete program from TS can be completed; IRD be tuned to after frequency, starting to induce sweat finally forms program.
Further, obtain and before the first pat table storing the first transport stream of the program comprising current broadcasting and the first pmt table (step 101), can also comprise: demultiplexing is carried out to the first transport stream.Another it is contemplated that demultiplexing is exactly that each circuit-switched data in time-multiplexed TS code stream is extracted, revert to independently data flow.
Further, Program Association Table PAT (ProgramAssociationTable) and Program Map Table PMT (ProgramMapTable) belongs to the Program Specific Information PSI (ProgramSpecificInformation) of transport stream.Wherein, contain the PID (PacketIDdentifier) number of pmt table in pat table, and the audio frequency of program number and this road program that pmt table indicates every road program is video code flow (PES, PacketizedElementaryStreams).
In actual applications, when decoder will be decoded to a certain road special code stream, first to find pat table, find the PID of required program and pmt table corresponding to this program according to pat table.May comprise multiple digital code stream in pmt table, each code stream has a unique PID corresponding with it.If what decode is video code flow, then in pmt table, find audio frequency and video videoPID value, then from transport stream, filter out program flow bag that pid value matches and deliver to Video Decoder.
It should be noted that, if program is encrypted, then need before transmission playback process device (as main frame) is play, also comprise the step that it is decrypted, such as: need to extract CAT table (ConditionalAccessTable CAT Conditional Access Table) comprising encryption and authorization message, for deciphering and scramble process.
From the above, a kind of transport stream processing method that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, according to the first pat table comprising the first transport stream of the program of current broadcasting stored and the first pmt table, revise the second pat table and second pmt table of the second transport stream, finally make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
Further, based on when receiving the incision request of program of the second transport stream, according to the first pat table and first pmt table of the first transport stream of described storage, the second pat table revising the second transport stream is different with the embodiment of the second pmt table (step 102), embodiments provide another kind of transport stream processing method, please refer to Fig. 2, Fig. 2 shows the method flow diagram of this embodiment, be described in detail the method below, the method comprises:
Step 201, obtain and store the first pat table and first pmt table of the first transport stream of the program comprising current broadcasting;
Filter and obtain the first pat table and the first pmt table, and storing the information of the first pat table and the information such as PID, program number (Programnumber) of the first pmt table.Wherein, PID is the bag identifier of the different pieces of information bag transmitted in TS stream, is the mark looking for each packet.
Further, obtain and before the first pat table storing the first transport stream of the program comprising current broadcasting and the first pmt table (step 201), can also comprise: demultiplexing is carried out to the first transport stream.Another it is contemplated that demultiplexing is exactly that each circuit-switched data in time-multiplexed TS code stream is extracted, revert to independently data flow.
Step 202, when receiving the incision request of program of the second transport stream, the second pat table of described second transport stream is replaced with described first pat table;
When receiving the incision request of program of the second transport stream, according to the first pat table of the first transport stream of described storage, the second pat table is replaced with the first pat table;
Step 203, the identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table;
After completing steps 202, according to the first pat table of the first transport stream of described storage, the identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table;
Step 204, the program number corresponding to program of asking in described second pmt table to cut is revised as program number corresponding to the program of current broadcasting in the first pmt table, and upgrades the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table;
According to the first pmt table of the first transport stream of described storage, revising asking the program number that the program of incision is corresponding in described second pmt table, upgrading the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table;
Be understandable that, according to ISO/IEC13818-1 agreement, the program number revising the second pmt table is in order to avoid searching programs again, upgrading the second pmt table version is renewal in order to allow playback process device (as main frame) can be checked through the second pmt table information, information due to pmt table has had change, so need to recalculate cyclic redundancy check value to check the correctness of transfer of data.
Step 205, transmission have revised the second transport stream of the second pat table and the second pmt table.
It should be noted that, second pat table of the second transport stream and the second pmt table are after the amendment of step 202, step 203 and step 204, relative to the first transport stream of program comprising current broadcasting, because pat table does not change, the PID of the pmt table therefore looked for by pat table is not also changed.And be revised as the PID of the pmt table of the first transport stream, so whole process is equivalent to the content that just have modified pmt table due to the PID of pmt table in the second transport stream.So the audio frequency and video of the second transport stream just can be out searched, is sent to playback process device (as main frame) plays so that follow-up.
Another it is contemplated that, if program is encrypted, then need, before transmission playback process device (as main frame) is play, also to comprise the step be decrypted it, such as: need to extract the CAT table comprising encryption and authorization message, for deciphering and scramble process.
From the above, a kind of transport stream processing method that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, according to the first pat table comprising the first transport stream of the program of current broadcasting stored and the first pmt table, revise the second pat table and second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
Further, based on when receiving the incision request of program of the second transport stream, according to the first pat table and first pmt table of the first transport stream of described storage, the second pat table revising the second transport stream is different with the embodiment of the second pmt table (step 102), the embodiment of the present invention additionally provides another kind of transport stream processing method, please refer to Fig. 3, and Fig. 3 shows the flow chart of this transport stream processing method, wherein, the method comprises:
Step 301, obtain and store the first pat table and first pmt table of the first transport stream of the program comprising current broadcasting;
Be understandable that, step 301 is identical with step 201, with reference to foregoing teachings, no longer specifically can set forth herein.
Step 302, when receiving the incision request of program of the second transport stream, the second pat table of described second transport stream is replaced with described first pat table;
When receiving the incision request of program of the second transport stream, according to the first pat table of the first transport stream of described storage, the second pat table of described second transport stream is replaced with described first pat table;
Step 303, the second pat table of described second transport stream is replaced with described first pat table;
According to the first pmt table of the first transport stream of described storage, the second pmt table of described second transport stream is replaced with described first pmt table;
Step 304, the PID of the audio frequency and video corresponding to program of asking in described second pmt table to cut is revised as the PID of audio frequency and video corresponding to the program of current broadcasting in the first pmt table;
After completing steps 303, according to the first pmt table of the first transport stream of described storage, revise the PID of audio frequency and video in the second pmt table;
Be understandable that, because the program play is audio frequency and video, therefore only need the PID being associated with audio frequency and video, program just can be play smoothly.Second pat table of the second transport stream and the second pmt table are replaced with the first pat table and first pmt table of the first transport stream, then the PID of the audio frequency and video of the second transport stream is revised as the program i.e. PID of the audio frequency and video of the first transport stream of current broadcasting, the essence of such second transport stream and the first transport stream be do not have differentiated, the main distinction is exactly audio-video frequency content difference, but amendment switches rear playback process device (as main frame) so does not just need again to search for, and can play the program of the request incision of the second transport stream smoothly.
Step 305, transmission have revised the second transport stream of the second pat table and the second pmt table.
It should be noted that, second pat table of the second transport stream and the second pmt table are after the amendment of step 302, step 303 and step 304, relative to the first transport stream of program comprising current broadcasting, just replace the audio/video information of former transport stream (the first transport stream), do not revise other information, so the second transport stream can be sent to playback process device (as main frame), the program of smooth playing request incision.
Another it is contemplated that, if program is encrypted, then need, before transmission playback process device (as main frame) is play, also to comprise the step be decrypted it, such as: need to extract the CAT table comprising encryption and authorization message, for deciphering and scramble process.
From the above, a kind of transport stream processing method that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, according to the first pat table comprising the first transport stream of the program of current broadcasting stored and the first pmt table, revise the second pat table and second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
The embodiment of the present invention additionally provides another kind of transport stream processing method, please refer to Fig. 4, and Fig. 4 shows the flow chart of this transport stream processing method, and wherein, the method comprises:
Step 401, obtain and store the first pat table and first pmt table of the first transport stream of the program comprising current broadcasting;
Be understandable that, step 401 is identical with step 101, with reference to foregoing teachings, no longer specifically can set forth herein.
Step 402, when receiving the incision request of program of the second transport stream, extract the first pat table of the first transport stream of described storage, according to the second pat table of described second transport stream, revise the first pat table of described extraction, and according to the first pat table revised, revise the second pat table of the second transport stream;
Step 403, the first pmt table according to the first transport stream of described storage, revise the second pmt table of the second transport stream;
Step 404, transmission have revised the second transport stream of the second pat table and the second pmt table.
Be understandable that, the executive agent of the method can be conditional receiving device, or other are for the device of transport stream process, do not do concrete restriction herein.
Further, obtain and before the first pat table storing the first transport stream of the program comprising current broadcasting and the first pmt table (step 401), can also comprise: demultiplexing is carried out to the first transport stream.Another it is contemplated that demultiplexing is exactly that each circuit-switched data in time-multiplexed TS code stream is extracted, revert to independently data flow.
Further, if program is encrypted, then need, before transmission playback process device (as main frame) is play, also to comprise the step be decrypted it, such as: need to extract the CAT table comprising encryption and authorization message, for deciphering and scramble process.
From the above, a kind of transport stream processing method that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, the pid value of the second pmt table in the second transport stream is substituted into the place with PMT information in the first pat table of the first transport stream, then the first pat table of the first transport stream revised is replaced the second pat table of the second transport stream, simultaneously according to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
Further, based on when receiving the incision request of program of the second transport stream, the second pat table revising the second transport stream is different with the embodiment of the second pmt table (step 402 and step 403), the embodiment of the present invention additionally provides another kind of transport stream processing method, please refer to Fig. 5, Fig. 5 shows the flow chart of this transport stream processing method, and wherein, the method comprises:
Step 501, obtain and store the first pat table and first pmt table of the first transport stream of the program comprising current broadcasting;
Filter and obtain the first pat table and the first pmt table, and storing the information of the first pat table and the information such as PID, program number (Programnumber) of the first pmt table.Wherein, PID is the bag identifier of the different pieces of information bag transmitted in TS stream, is the mark looking for each packet.
Wherein, obtain and before the first pat table storing the first transport stream of the program comprising current broadcasting and the first pmt table (step 501), can also comprise: demultiplexing is carried out to the first transport stream.Another it is contemplated that demultiplexing is exactly that each circuit-switched data in time-multiplexed TS code stream is extracted, revert to independently data flow.
Step 502, when receiving the incision request of program of the second transport stream, extract the first pat table of the first transport stream of described storage, according to the second pat table of described second transport stream, the PID of the first corresponding for the program of current broadcasting in the first pat table of described extraction pmt table is revised as in described second pat table the PID of the second pmt table corresponding to program asking to cut, and upgrade the version of described first pat table, and calculate the cyclic redundancy check value of renewal first pat table;
Information due to the first pat table has had change, so need to recalculate cyclic redundancy check value to check the correctness of transfer of data.
Step 503, described second pat table replaced with amendment upgrade after the first pat table;
After completing steps 502, i.e., after the first pat table information of the good described extraction of amendment, described second pat table is replaced with the first pat table after amendment renewal;
Step 504, the program number corresponding to program of asking in described second pmt table to cut is revised as program number corresponding to the program of current broadcasting in the first pmt table, and calculates the cyclic redundancy check value of renewal second pmt table;
According to the first pmt table of the first transport stream of described storage, revise the program number of the second pmt table; Information due to the second pmt table has had change, so need to recalculate cyclic redundancy check value to check the correctness of transfer of data;
Step 505, transmission have revised the second transport stream of the second pat table and the second pmt table.
It should be noted that, in the present embodiment, the pid value of the second pmt table in the second transport stream is substituted into the place with PMT information in the first pat table of the first transport stream, then the first pat table of the first transport stream revised is replaced the second pat table of the second transport stream, according to the first pmt table of the first transport stream, revise the program number of the second pmt table, the second transport stream can be sent to playback process device (as main frame), the program of smooth playing request incision.
Another it is contemplated that, if program is encrypted, then need, before transmission playback process device (as main frame) is play, also to comprise the step be decrypted it, such as: need to extract the CAT table comprising encryption and authorization message, for deciphering and scramble process.
From the above, a kind of transport stream processing method that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, the pid value of the second pmt table in the second transport stream is substituted into the place with PMT information in the first pat table of the first transport stream, then the first pat table of the first transport stream revised is replaced the second pat table of the second transport stream, simultaneously according to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
For ease of better implementing the technical scheme of the embodiment of the present invention, the embodiment of the present invention is also provided for the relevant apparatus implementing said method.Wherein the implication of noun is identical with said method, and specific implementation details can explanation in reference method embodiment.
Please refer to Fig. 6, Fig. 6 shows the structural representation of a kind of conditional receiving device 600 that the embodiment of the present invention provides, and wherein, described conditional receiving device 600 comprises:
First obtains memory module 601, for obtaining and storing the first pat table and first pmt table of the first transport stream of the program comprising current broadcasting;
Further, in the present embodiment, the pat table of program and pmt table all belong to PSI information.Wherein, in pat table, contain No. PID of pmt table, and pmt table indicates the program number of every road program and the audio frequency of this road program is video code flow.
First processing module 602, for when receiving the incision request of program of the second transport stream, obtain the first pat table and first pmt table of the first transport stream that memory module 601 stores according to described first, revise the second pat table and second pmt table of the second transport stream;
First sending module 603, for sending the second transport stream revising the second pat table and the second pmt table processed through described first processing module 602.
Be understandable that, described conditional receiving device 600 can also comprise demultiplexing module (DMUX), to obtain and before storing the first pat table of the first transport stream of the program comprising current broadcasting and the first pmt table (first obtains memory module 601), for carrying out demultiplexing to the first transport stream.Another it is contemplated that demultiplexing is exactly that each circuit-switched data in time-multiplexed TS code stream is extracted, revert to independently data flow.
Further, in some embodiments, described first processing module 602, specifically for the first pat table of the first transport stream according to described acquisition memory module 601 storage, can replace with described first pat table by the second pat table of described second transport stream; The identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table; According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and upgrade the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table.
It should be noted that, in this embodiment, the second pat table of the second transport stream and the second pmt table after amendment, relative to the first transport stream of program comprising current broadcasting, because pat table does not change, the PID of the pmt table therefore looked for by pat table is not also changed.And be revised as the PID of the pmt table of the first transport stream, so whole process is equivalent to the content that just have modified pmt table due to the PID of pmt table in the second transport stream.So the audio frequency and video of the second transport stream just can be out searched, is sent to playback process device (as main frame) plays so that follow-up.
Further, in some embodiments, described first processing module 602, can also be used for the first pat table of the first transport stream stored according to described acquisition memory module 601, the second pat table of described second transport stream is replaced with described first pat table; According to the first pmt table of the first transport stream of described storage, the second pmt table of described second transport stream is replaced with described first pmt table; The PID of the audio frequency and video corresponding to program of asking in described second pmt table to cut is revised as the PID of audio frequency and video corresponding to the program of current broadcasting in the first pmt table.
It should be noted that, in this embodiment, second pat table of the second transport stream and the second pmt table are after amendment, relative to the first transport stream of program comprising current broadcasting, just replace the audio/video information of former transport stream (the first transport stream), do not revise other information, so, second transport stream can be sent to playback process device (as main frame), the program of smooth playing request incision.
Another it is contemplated that, described conditional receiving device 600 can also comprise deciphering and descrambling module, if encrypted for program, then need before transmission playback process device (as main frame) is play, to the step that it is decrypted, such as: need to extract the CAT table comprising encryption and authorization message, for deciphering and scramble process.
Be understandable that, in the conditional receiving device 600 that the embodiment of the present invention provides, the function of its each functional module can according to the method specific implementation in said method embodiment, and its specific implementation process with reference to the associated description of said method embodiment, can repeat no more herein.
From the above, a kind of conditional receiving device 600 that the embodiment of the present invention provides, play for needing the program of current broadcasting to be switched to the second transport stream directly inputted from conditional receiving device 600, according to the first pat table comprising the first transport stream of the program of current broadcasting stored and the first pmt table, revise the second pat table and second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, implementation process is simple, convenient.
The embodiment of the present invention also provides another kind of conditional receiving device, please refer to Fig. 7, and Fig. 7 shows the structural representation of this conditional receiving device 700, and wherein, described conditional receiving device 700 comprises:
Second obtains memory module 701, for obtaining and storing the first pat table and first pmt table of the first transport stream of the program comprising current broadcasting;
Second processing module 702, for when receiving the incision request of program of the second transport stream, extract the first pat table that described second obtains the first transport stream that memory module 701 stores, according to the second pat table of described second transport stream, revise the first pat table of described extraction, and according to the first pat table revised, revise the second pat table of the second transport stream; According to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream.
Second sending module 703, for sending the second transport stream revising the second pat table and the second pmt table processed through described second processing module 702.
Be understandable that, described conditional receiving device 700 can also comprise demultiplexing module, to obtain and before storing the first pat table of the first transport stream of the program comprising current broadcasting and the first pmt table (second obtains memory module 701), for carrying out demultiplexing to the first transport stream.Another it is contemplated that demultiplexing is exactly that each circuit-switched data in time-multiplexed TS code stream is extracted, revert to independently data flow.
Further, described second processing module 702 is specifically for extracting the first pat table of the first transport stream of described acquisition memory module 701 storage, according to the second pat table of described second transport stream, the PID of the first corresponding for the program of current broadcasting in the first pat table of described extraction pmt table is revised as in described second pat table the PID of the second pmt table corresponding to program asking to cut, and upgrade the version of described first pat table, and calculate the cyclic redundancy check value of renewal first pat table; Described second pat table is replaced with the first pat table after amendment renewal; According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and calculates the cyclic redundancy check value of renewal second pmt table.
It should be noted that, in this embodiment, the pid value of the second pmt table in the second transport stream is substituted into the place with PMT information in the first pat table of the first transport stream, then the first pat table of the first transport stream revised is replaced the second pat table of the second transport stream, according to the first pmt table of the first transport stream, revise the program number of the second pmt table, the second transport stream can be sent to playback process device (as main frame), the program of smooth playing request incision.
Another it is contemplated that, described conditional receiving device 700 can also comprise deciphering and descrambling module, if encrypted for program, then need before transmission playback process device (as main frame) is play, to the step that it is decrypted, such as: need to extract the CAT table comprising encryption and authorization message, for deciphering and scramble process.
Be understandable that, in the conditional receiving device 700 that the embodiment of the present invention provides, the function of its each functional module can according to the method specific implementation in said method embodiment, and its specific implementation process with reference to the associated description of said method embodiment, can repeat no more herein.
From the above, a kind of conditional receiving device 700 that the embodiment of the present invention provides, directly play from the second transport stream of conditional receiving device input for needing the program of current broadcasting to be switched to, the table pid value of the 2nd PMT in the second transport stream is substituted into the place with PMT information in the first pat table of the first transport stream, then the first pat table of the first transport stream revised is replaced the second pat table of the second transport stream, simultaneously according to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, whole implementation process switches without the need to user's manual search, simple to operate, convenient.
The embodiment of the present invention is also provided for the related system implementing said method.Wherein implication and the said method of noun are identical with in device, and specific implementation details can explanation in reference method and device embodiment.
Please refer to Fig. 8, Fig. 8 shows the structural representation of a kind of transport stream treatment system 800 that the embodiment of the present invention provides, and wherein, this system 800 comprises:
Main frame 801 and the conditional receiving device as above described in embodiment 600, wherein, described main frame 801, for playing the program of the first transport stream, and receive that described conditional receiving device 600 sends revise the second transport stream of the second pat table and the second pmt table after, revised the program of the request incision of the second transport stream of the second pat table and the second pmt table described in broadcasting.
From the above, a kind of transport stream treatment system 800 that the embodiment of the present invention provides, play for needing the program of current broadcasting to be switched to the second transport stream directly inputted from conditional receiving device 600, process through conditional receiving device 600, revise the second pat table and second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, whole implementation process switches without the need to user's manual search, simple, convenient.
The embodiment of the present invention also provides another kind of transport stream treatment system, please refer to Fig. 9, and Fig. 9 shows should the structural representation of transport stream treatment system 900, and wherein, this system 900 comprises:
Main frame 901 and the conditional receiving device as above described in embodiment 700, wherein, described main frame 901, for playing the program of the first transport stream, and receive that described conditional receiving device 700 sends revise the second transport stream of the second pat table and the second pmt table after, revised the program of the request incision of the second transport stream of the second pat table and the second pmt table described in broadcasting.
From the above, a kind of transport stream treatment system 900 that the embodiment of the present invention provides, play for needing the program of current broadcasting to be switched to the second transport stream directly inputted from conditional receiving device 700, process through conditional receiving device 700, revise the second pat table and second pmt table of the second transport stream, make the first transport stream identical with the PSI information that the second transport stream is carried, avoid occurring that the program cut can not identify thus cannot the problem of normal play, whole implementation process switches without the need to user's manual search, simple, convenient.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the unit module in the system of foregoing description, device and device, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
Above a kind of transport stream processing method provided by the present invention, relevant apparatus and system are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. a transport stream processing method, is characterized in that, comprising:
Obtain and store the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
When receiving the incision request of program of the second transport stream, according to the first pat table and first pmt table of the first transport stream of described storage, revise the second pat table and second pmt table of the second transport stream, the Program Specific Information PSI that described first transport stream is carried is identical with the PSI that described second transport stream is carried; Described second pat table is replaced with described first pat table, described second pmt table is replaced with described first pmt table;
Send the second transport stream having revised the second pat table and the second pmt table.
2. method according to claim 1, is characterized in that, the first pat table of described the first transport stream according to described storage and the first pmt table, revises the second pat table and second pmt table of the second transport stream, comprising:
According to the first pat table of the first transport stream of described storage, the second pat table of described second transport stream is replaced with described first pat table;
The identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table;
According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and upgrade the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table.
3. method according to claim 1, is characterized in that, the first pat table of described the first transport stream according to described storage and the first pmt table, revises the second pat table and second pmt table of the second transport stream, comprising:
According to the first pat table of the first transport stream of described storage, the second pat table of described second transport stream is replaced with described first pat table;
According to the first pmt table of the first transport stream of described storage, the second pmt table of described second transport stream is replaced with described first pmt table;
The PID of the audio frequency and video corresponding to program of asking in described second pmt table to cut is revised as the PID of audio frequency and video corresponding to the program of current broadcasting in the first pmt table.
4. a transport stream processing method, is characterized in that, comprising:
Obtain and store the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
When receiving the incision request of program of the second transport stream, extract the first pat table of the first transport stream of described storage, according to the second pat table of described second transport stream, revise the first pat table of described extraction, and according to the first pat table revised, revise the second pat table of the second transport stream, described second pat table is replaced with the first pat table revised;
According to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream, described second pmt table is replaced with described first pmt table, and the Program Specific Information PSI that described first transport stream is carried is identical with the PSI that described second transport stream is carried;
Send the second transport stream having revised the second pat table and the second pmt table.
5. method according to claim 4, is characterized in that,
First pat table of the first transport stream of the described storage of described extraction, according to the second pat table of described second transport stream, revises the first pat table of described extraction, and according to the first pat table revised, revises the second pat table of the second transport stream, comprising:
Extract the first pat table of the first transport stream of described storage, according to the second pat table of described second transport stream, the PID of the first corresponding for the program of current broadcasting in the first pat table of described extraction pmt table is revised as in described second pat table the PID of the second pmt table corresponding to program asking to cut, and upgrade the version of described first pat table, and calculate the cyclic redundancy check value of renewal first pat table;
Described second pat table is replaced with the first pat table after amendment renewal;
First pmt table of described the first transport stream according to described storage, revise the second pmt table of the second transport stream, comprising:
According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and calculates the cyclic redundancy check value of renewal second pmt table.
6. a conditional receiving device, is characterized in that, comprising:
First obtains memory module, for obtaining and storing the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
First processing module, for when receiving the incision request of program of the second transport stream, the first pat table and first pmt table of the first transport stream that memory module stores is obtained according to described first, revise the second pat table and second pmt table of the second transport stream, the Program Specific Information PSI that described first transport stream is carried is identical with the PSI that described second transport stream is carried; Described second pat table is replaced with described first pat table;
First sending module, for sending the second transport stream revising the second pat table and the second pmt table through described first processing module process.
7. device according to claim 6, is characterized in that,
Second pat table of described second transport stream, specifically for the first pat table of the first transport stream according to described acquisition memory module storage, is replaced with described first pat table by described first processing module; The identity code transmission package PID of second pmt table corresponding to program of asking in described second pat table to cut is revised as the PID of the first pmt table corresponding to the program of current broadcasting in the first pat table; According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and upgrade the version of the second pmt table, and calculate the cyclic redundancy check value of renewal second pmt table.
8. device according to claim 6, is characterized in that,
Second pat table of described second transport stream, specifically for the first pat table of the first transport stream according to described acquisition memory module storage, is replaced with described first pat table by described first processing module; According to the first pmt table of the first transport stream of described storage, the second pmt table of described second transport stream is replaced with described first pmt table; The PID of the audio frequency and video corresponding to program of asking in described second pmt table to cut is revised as the PID of audio frequency and video corresponding to the program of current broadcasting in the first pmt table.
9. a conditional receiving device, is characterized in that, comprising:
Second obtains memory module, for obtaining and storing the first Program Association Table PAT and the first Program Map Table PMT of the first transport stream of the program comprising current broadcasting;
Second processing module, for when receiving the incision request of program of the second transport stream, extract the first pat table that described second obtains the first transport stream that memory module stores, according to the second pat table of described second transport stream, revise the first pat table of described extraction, and according to the first pat table revised, revise the second pat table of the second transport stream, described second pat table is replaced with the first pat table revised; According to the first pmt table of the first transport stream of described storage, revise the second pmt table of the second transport stream, the Program Specific Information PSI that described first transport stream is carried is identical with the PSI that described second transport stream is carried; Described second pmt table is replaced with described first pmt table;
Second sending module, for sending the second transport stream revising the second pat table and the second pmt table through described second processing module process.
10. device according to claim 9, is characterized in that,
Described second processing module is specifically for extracting the first pat table of the first transport stream of described acquisition memory module storage, according to the second pat table of described second transport stream, the PID of the first corresponding for the program of current broadcasting in the first pat table of described extraction pmt table is revised as in described second pat table the PID of the second pmt table corresponding to program asking to cut, and upgrade the version of described first pat table, and calculate the cyclic redundancy check value of renewal first pat table; Described second pat table is replaced with the first pat table after amendment renewal; According to the first pmt table of the first transport stream of described storage, program number corresponding for the program of asking in described second pmt table to cut is revised as the program number that the program of current broadcasting in the first pmt table is corresponding, and calculates the cyclic redundancy check value of renewal second pmt table.
11. 1 kinds of transport stream treatment systems, it is characterized in that, described system comprises main frame and the conditional receiving device according to any one of claim 6 to 8, or described system comprises main frame and the conditional receiving device as described in claim 9 or 10, wherein, described main frame, for playing the program of the first transport stream, and receive that described conditional receiving device sends revise the second transport stream of the second pat table and the second pmt table after, revised the program of the request incision of the second transport stream of the second pat table and the second pmt table described in broadcasting.
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| CN103533409A (en) * | 2013-10-24 | 2014-01-22 | 深圳国微技术有限公司 | Method and device for playing stream media file |
| CN103763588A (en) * | 2014-01-03 | 2014-04-30 | 深圳市龙视传媒有限公司 | Stream forwarding method, device, server and system for video advertising insertion |
| CN104270667A (en) * | 2014-09-28 | 2015-01-07 | 深圳国微技术有限公司 | Program switchover method and device and terminal |
| CN105072463B (en) * | 2015-07-20 | 2019-06-28 | 浙江华数广电网络股份有限公司 | A kind of digital TV direct instantaneously cuts platform method |
| CN108289227A (en) * | 2018-01-04 | 2018-07-17 | 山东浪潮商用系统有限公司 | A kind of method and device for realizing that audio-video source is replaced in TS streams |
| CN109327706A (en) * | 2018-10-10 | 2019-02-12 | 广东省南方数字电视无线传播有限公司 | Programme televised live signal acceptance method and system based on DTMB |
| CN111726680B (en) * | 2020-06-17 | 2022-06-10 | 伟乐视讯科技股份有限公司 | Method and equipment for realizing EIT table multiplexing |
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| CN101202901A (en) * | 2007-10-17 | 2008-06-18 | 深圳市同洲电子股份有限公司 | Method, device and system for processing package identifier of program transmission package |
| CN102611935A (en) * | 2012-02-29 | 2012-07-25 | 山东泰信电子有限公司 | Playing method of multi-code-stream single channel |
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| CN101202901A (en) * | 2007-10-17 | 2008-06-18 | 深圳市同洲电子股份有限公司 | Method, device and system for processing package identifier of program transmission package |
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