CN101009826A - A device of the digital TV terminal for TS stream reuse - Google Patents
A device of the digital TV terminal for TS stream reuse Download PDFInfo
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- CN101009826A CN101009826A CNA2006100334120A CN200610033412A CN101009826A CN 101009826 A CN101009826 A CN 101009826A CN A2006100334120 A CNA2006100334120 A CN A2006100334120A CN 200610033412 A CN200610033412 A CN 200610033412A CN 101009826 A CN101009826 A CN 101009826A
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Abstract
The related device for multiplexing TS flow on DTV terminal comprises: multiple HF heads to output multi-path TS flow, an application circuit for TS flow, a TS flow multiplexing chip set between former head and circuit to extract menu from TS flow and multiplex into new one-path multi-menu TS flow, and a control unit connected with last chip to input PID and control command. This invention realizes synchronous application for multi-path menu.
Description
[technical field]
The present invention's design relates to the digital television techniques field, relates in particular to a kind of device of realizing the TS transmission flow multiplex in digital TV terminal.
[background technology]
In Digital Television, all videos, audio frequency, literal, picture etc. have all become data after digitized processing, and according to the packing of the standard of MPEG-2, form the transmission bag of regular length (188 bytes or 204 bytes), carry out these packets multiplexing then, form TS stream (transport stream), described TS stream sends in the channel through after chnnel coding and the modulation; At receiving terminal, just in time opposite, through demodulation, after channel-decoding and the forward error correction, again by the transmission demodulation multiplexer, respectively output look, audio ES stream (elementary stream) and data and control information, again by looking, behind the audio decoder, sending into digital television display system and audio frequency broadcast system respectively.And digital TV terminal can only be used (as playing or recording) to one road program at present, can't realize the above program of two-way or two-way application function simultaneously, as also recording other one road program when playing one road program.
[summary of the invention]
Technical problem to be solved by this invention is: provide a kind of and realize the multiplexing device of TS stream in digital TV terminal, in can flowing the multi-path program multiplexing that is in different frequent points to same TS, and then the realization multi-channel program is used in the time of digital TV terminal.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of in the multiplexing device of digital TV terminal realization TS stream, comprising:
A plurality of tuners are used to export multichannel TS stream;
Application circuit is used for TS stream is used;
TS flows multiplexing chip, is located between described tuner and the application circuit, is used for extracting required multi-channel program and with the road Polymera TS stream of described multi-path program multiplexing Cheng Xin from input multichannel TS stream;
Control unit flows PID and the control command that multiplexing chip links to each other and is used for importing to it required multi-channel program with described TS.
Further improvement in the technical proposal is that this TS stream multiplexing chip comprises:
A plurality of filtrations and information extraction modules, link to each other with each tuner respectively, sky bag during each road TS of this filtration and information extraction modules filtering flows, and the required programs PID (transmission package identifier) that the described control unit of foundation provides imports PSI/SI (the special information/business information of program) information and PCR (timer reference of programs) information that TS flows according to video information, audio-frequency information, each road that pat table (Program Association Table)-pmt table (Program Map Table)-ES flows the hierarchical structure extraction required programs of (basic stream);
A plurality of PCR correction modules link to each other with each filtration and information extraction modules output respectively, import the transmission rate of each road TS stream and determine the PCR value that described new TS flows according to the PCR information calculations that described filtration and information extraction modules provide;
The PSI/SI reconstructed module links to each other with described filtration and information extraction modules output, according to the PSI/SI information of the described new TS stream of the hierarchical structure reconstruct of ES stream-pmt table-pat table;
TS flows recombination module, links to each other with described filtration and information extraction modules output, is used for the looking of required multi-channel program, audio transmission bag are multiplexed into new road Polymera TS stream;
Output control module is connected between described application circuit and PCR correction module, PSI/SI reconstructed module and the TS stream recombination module, is used for PCR value after proofreading and correct and the PSI/SI information after the reconstruct are inserted new TS stream.
Further improvement in the technical proposal is that this filtration and information extraction modules comprise:
Empty packet filtering submodule links to each other with described tuner, filtering import each road TS flow in pid value be the empty transmission package of 0X1FFF;
PID filtration and PSI/SI, PCR information extraction submodule link to each other with described empty packet filtering submodule, and the PSI/SI information and the PCR information of TS stream is imported on video information, audio-frequency information, each road of extracting required programs.
Further improvement in the technical proposal is: this filtration and information extraction modules comprise that also a PID remaps submodule, between connection and described PID filtration and PSI/SI, PCR information extraction submodule and TS recombination module, the PSI/SI reconstructed module, be used for the PID of each road TS flow transmission bag is remapped.
Further improvement in the technical proposal is that this TS stream recombination module comprises:
TS stream reconstruct submodule links to each other with described filtration and information extraction modules, is used for the road Polymera TS stream with described multi-path program multiplexing Cheng Xin;
TS buffer sublayer module is connected between described TS stream reconstruct submodule and the output control module transmission package of temporary described new TS stream.
Further improvement in the technical proposal is: be provided with fifo register between this tuner and described filtration and the information extraction modules.
Further improvement in the technical proposal is: this control unit is a CPU.
Further improvement in the technical proposal is: this TS stream multiplexing chip is a FPGA or the ASIC that adopts the FPGA design.
Further improvement in the technical proposal is: this application circuit comprises decoder or the encoder that links to each other with TS stream multiplexing chip output, this decoder with look, audio playing circuit links to each other, this encoder with record circuit and link to each other.
A plurality of tuners the invention has the beneficial effects as follows: owing to can generate multichannel TS stream and be sent to TS stream multiplexing chip among the present invention, the required multi-channel program PID that described TS stream multiplexing chip provides according to control unit, from the multichannel TS of described input stream, extract required multi-channel program and with the road Polymera TS stream of described multi-path program multiplexing Cheng Xin, and then realize that multi-channel program uses in the time of digital TV terminal, as in broadcast one road program, also recording to other one road program.
[description of drawings]
Fig. 1 is a kind of functional-block diagram of realizing the device that TS stream is multiplexing in digital TV terminal of the present invention.
To be that the present invention is a kind of realize the functional-block diagram of TS stream multiplexing chip in the multiplexing device of TS stream in digital TV terminal to Fig. 2.
[embodiment]
The invention will be further described below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, the present invention is a kind of to realize the multiplexing device of TS stream in digital TV terminal, comprising:
A plurality of tuners are used to export multichannel TS stream;
Application circuit is used for TS stream is used;
TS flows multiplexing chip, is located between described tuner and the application circuit, is used for extracting required multi-channel program and with the road Polymera TS stream of described multi-path program multiplexing Cheng Xin from input multichannel TS stream;
Control unit flows PID and the control command that multiplexing chip links to each other and is used for importing to it required multi-channel program with described TS.
This TS stream multiplexing chip comprises:
A plurality of filtrations and information extraction modules, link to each other with each tuner respectively, sky bag during each road TS of this filtration and information extraction modules filtering flows, and the required programs PID that the described control unit of foundation provides imports PSI/SI information and the PCR information that TS flows according to video information, audio-frequency information, each road of the hierarchical structure extraction required programs of pat table-pmt table-ES stream; Simultaneously, this filtration and information are put forward module and are comprised: empty packet filtering submodule, link to each other with described tuner, and filtering imports that pid value is the empty transmission package of 0X1FFF in each road TS stream; PID filtration and PSI/SI, PCR information extraction submodule link to each other with described empty packet filtering submodule, and the PSI/SI information and the PCR information of TS stream is imported on video information, audio-frequency information, each road of extracting required programs; PID remaps submodule, and connection and described PID filtration and PSI/SI, PCR information extraction submodule and TS recombination module, PID remap between the submodule, are used for the PID of each road TS flow transmission bag is remapped.
A plurality of PCR correction modules link to each other with each filtration and information extraction modules output respectively, import the transmission rate of each road TS stream and determine the PCR value that described new TS flows according to the PCR information calculations that described filtration and information extraction modules provide;
The PSI/SI reconstructed module links to each other with described filtration and information extraction modules output, according to the PSI/SI information of the described new TS stream of the hierarchical structure reconstruct of ES stream-pmt table-pat table;
TS flows recombination module, links to each other with described filtration and information extraction modules output, is used for the looking of required multi-channel program, audio transmission bag are multiplexed into new road Polymera TS stream; This TS stream recombination module comprises: TS stream reconstruct submodule, link to each other with described filtration and information extraction modules, and be used for road Polymera TS stream with described multi-path program multiplexing Cheng Xin; TS buffer sublayer module is connected between described TS stream reconstruct submodule and the output control module transmission package of temporary described new TS stream;
Output control module is connected between described application circuit and PCR correction module, PSI/SI reconstructed module and the TS stream recombination module, is used for PCR value after proofreading and correct and the PSI/SI information after the reconstruct are inserted new TS stream.
Be provided with fifo register between this tuner and described filtration and the information extraction modules.
This control unit is a CPU (central processing unit).
This TS stream multiplexing chip is a FPGA (field programmable gate array) or the ASIC (application-specific integrated circuit (ASIC)) that adopts the FPGA design.
This application circuit comprises decoder or the encoder that links to each other with TS stream multiplexing chip output, this decoder with look, audio playing circuit links to each other, this encoder with record circuit and link to each other, the function that realizes as also can record other one road program when playing one road program.
During application,
One, receiving filtration module
TS stream enters the receiving filtration module through FIFO, at first import empty packet filtering submodule, described empty packet filtering submodule is judged the PID of transmission package in the TS stream, pid value is to abandon after the transmission package of 0X1FFF is filtered, and the transmission package of all the other pid values enters PID filtration and PSI/SI, PCR information extraction submodule by this submodule.
In PID filtration and PSI/SI, PCR information extraction submodule, by pid value is the pat table of 0X0000, can directly find the pid value of the pmt table of each programs in TS stream, the pid information of the required programs that provides according to CPU, any one road program that we just can choose in this TS stream begins multiplexing, according to the pmt table of this program, each audio frequency and video bag and packet of identifying this program that can be detailed, thus carry out multiplexing; PSI/SI information also identifies at this in addition, is sent to and prepares in the PSI/SI reconstructed module to be reconstructed; In addition,, can obtain the PCR value of this road TS stream, this PCR value is sent in the PCR correction module is for further processing by pmt table.
Each audio frequency and video bag of required programs and packet by PID filtration and PSI/SI, PCR information extraction submodule after, arrive PID and remap submodule.In this module, the transmission package PID in the two-way program (comprising PID, video PID, audio frequency PID, data PID, Program Clock Reference PCR_PID of program PMT etc.) is remapped.According to the MPEG13818 agreement, comprise 0X0000, the PID of 0X0001 or the like is fixed with special purposes, as long as so we avoid this fixing PID, just can formulate freely by us.The pid value that we draft according in advance at this, remapping up of contrast just can be finished the function of this module.
Two, PCR modified module
Program Clock Reference PCR is a very important parameter in the whole system, because in multiplexing process, change has taken place in the position of PCR etc., therefore must the PCR value be proofreaied and correct, decoder must go to recover synchronous again by PCR simultaneously, to finish the function of decoding.
At first, we measure the transmission package that first contains PCR in TS stream, leave this PCR value, begin afterwards the transmission package number is counted, up to the transmission package that finds second to contain PCR.This is that count value is num
1The difference of two PCR values is PCR
1Calculate the original input rate trr of this program in view of the above
1(trr
1=num
1/ PCR
1* system's local clock (being generally 27MHz)).Then the n road same method of program is handled, obtained num
n, PCR
nOriginal input rate trr with n road program
nIn the TS of output stream, we carry out following processing.With num
1Num
nIn maximum be made as the home position of PCR in the described new TS stream, according to object flow speed and primary flow transmission rate, can calculate ideal position (PCR ideal position=max (num of PCR
1... num
n) * object flow speed/original transmitted speed, in this object flow transmission rate more than or equal to original effective transmission speed).Simultaneously in the required programs transmission package of output, when find first programs first when containing the transmission package of PCR, also begin counting, when finding first programs the 2nd PCR value, count value is num
m, according to this, (PCR revises difference=(num can to obtain PCR correction difference
m-PCR ideal position)/object flow speed * system local clock).The PCR of last first programs output just can by inlet flow PCR value and PCR correction value with obtain (output stream PCR=inlet flow PCR+PCR revises difference).In like manner also can calculate the PCR value of second programs output.
Three, TS stream recombination module
In TS stream reconstruct submodule, synthetic one road TS stream is arranged in the transmission package input of two-way program sequentially, is sent to TS buffer sublayer module simultaneously.
In TS buffer sublayer module, temporary to this through the transmission package of the stream of the TS after multiplexing, according to the output order of output control submodule, the TS packet in this submodule constantly mails to next module.
Four, PSI/SI reconstructed module
Multi-channel program is through after merging, and TS flows the PID of audio frequency and video of the inside program or the like, and change has taken place for PMT, PAT, therefore must be reconstructed PSI/SI information and guarantee that just whole new TS stream meets the MPEG13818 agreement.
In the data of this module, comprise the video PID among the PMT of each program, audio frequency PID, data PID and Program Clock Reference PCR-PID are through remapping; So according to the syntactic structure of PMT, the check code that will generate with 32 cyclic redundancy check (CRC) algorithms is placed in the pmt table, obtains the pmt table after this program reconstruct.
To participating in multiplexed program, the PID of the pmt table of its each program remapped, and the check code in that 32 redundancy check CRC algorithms are generated is placed on the pat table tail, obtained the pat table after the reconstruct.
SI is to an expansion of the information among the PSI and replenishes, also is an indispensable part in the digital television system simultaneously.After multiplexing, variation has also taken place in the SI information of original T S stream, and therefore the SI information of part is also wanted reconstruct.At first SDT Service Description Table SDT must revise, need be with multiplexing deutomerite purpose traffic descriptor change.Secondly among the BAT bouquet association table BAT, its bouquet-name (bouquet name) should revise.Event Information Table EIT also needs to carry out corresponding information modification in addition.Last network information table NIT also must make amendment to some parameters that comprise frequency list descriptor.
Five, output control module
This module is that the output of new TS stream is controlled, and the main function of this part is an insertion PSI/SI information regularly, guarantees that new TS stream meets the MPEG13818 agreement, can normally carry out various application.
Because a plurality of tuners can generate multichannel TS stream and be sent to TS stream multiplexing chip among the present invention, the required multi-channel program PID that described TS stream multiplexing chip provides according to control unit, from the multichannel TS of described input stream, extract required multi-channel program and with the road Polymera TS stream of described multi-path program multiplexing Cheng Xin, and then realize that multi-channel program uses in the time of digital TV terminal, as in broadcast one road program, also recording to other one road program.
Claims (9)
1, a kind of in the multiplexing device of digital TV terminal realization TS stream, comprising:
A plurality of tuners are used to export multichannel TS stream;
Application circuit is used for TS stream is used, and it is characterized in that, also comprises:
TS flows multiplexing chip, is located between described tuner and the application circuit, is used for extracting required multi-channel program and with the road Polymera TS stream of described multi-path program multiplexing Cheng Xin from input multichannel TS stream;
Control unit flows PID and the control command that multiplexing chip links to each other and is used for importing to it required multi-channel program with described TS.
2, as claimed in claim 1 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that this TS flows multiplexing chip and comprises:
A plurality of filtrations and information extraction modules, link to each other with each tuner respectively, sky bag during each road TS of this filtration and information extraction modules filtering flows, and the required programs PID that the described control unit of foundation provides imports PSI/SI information and the PCR information that TS flows according to video information, audio-frequency information, each road of the hierarchical structure extraction required programs of pat table-pmt table-ES stream;
A plurality of PCR correction modules link to each other with each filtration and information extraction modules output respectively, import the transmission rate of each road TS stream and determine the PCR value that described new TS flows according to the PCR information calculations that described filtration and information extraction modules provide;
The PSI/SI reconstructed module links to each other with described filtration and information extraction modules output, according to the PSI/SI information of the described new TS stream of the hierarchical structure reconstruct of ES stream-pmt table-pat table;
TS flows recombination module, links to each other with described filtration and information extraction modules output, is used for the looking of required multi-channel program, audio transmission bag are multiplexed into new road Polymera TS stream;
Output control module is connected between described application circuit and PCR correction module, PSI/SI reconstructed module and the TS stream recombination module, is used for PCR value after proofreading and correct and the PSI/SI information after the reconstruct are inserted new TS stream.
3, as claimed in claim 2 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that this filtration and information extraction modules comprise:
Empty packet filtering submodule links to each other with described tuner, filtering import each road TS flow in pid value be the empty transmission package of 0X1FFF;
PID filtration and PSI/SI, PCR information extraction submodule link to each other with described empty packet filtering submodule, and the PSI/SI information and the PCR information of TS stream is imported on video information, audio-frequency information, each road of extracting required programs.
4, as claimed in claim 3 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that: this filtration and information extraction modules comprise that also a PID remaps submodule, between connection and described PID filtration and PSI/SI, PCR information extraction submodule and TS recombination module, the PSI/SI reconstructed module, be used for the PID of each road TS flow transmission bag is remapped.
5, as claimed in claim 2 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that this TS flows recombination module and comprises:
TS stream reconstruct submodule links to each other with described filtration and information extraction modules, is used for the road Polymera TS stream with described multi-path program multiplexing Cheng Xin;
TS buffer sublayer module is connected between described TS stream reconstruct submodule and the output control module transmission package of temporary described new TS stream.
6, as claimed in claim 2 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that: be provided with fifo register between this tuner and described filtration and the information extraction modules.
7, a kind of sub-figure television terminal as claimed in claim 1 is realized the multiplexing device of TS stream, and it is characterized in that: this control unit is a CPU.
8, as claimed in claim 1 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that: this TS stream multiplexing chip is a FPGA or the ASIC that adopts the FPGA design.
9, as claimed in claim 1 a kind of in the multiplexing device of digital TV terminal realization TS stream, it is characterized in that: this application circuit comprises decoder or the encoder that links to each other with TS stream multiplexing chip output, this decoder with look, audio playing circuit links to each other, this encoder with record circuit and link to each other.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100334120A CN101009826A (en) | 2006-01-25 | 2006-01-25 | A device of the digital TV terminal for TS stream reuse |
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|---|---|---|---|
| CNA2006100334120A CN101009826A (en) | 2006-01-25 | 2006-01-25 | A device of the digital TV terminal for TS stream reuse |
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| CN101710984A (en) * | 2009-12-04 | 2010-05-19 | 深圳创维数字技术股份有限公司 | Digital television program processing method based on PID reconstruction |
| CN101951387A (en) * | 2010-09-30 | 2011-01-19 | 海信集团有限公司 | Method and device for transmitting stream media |
| CN101969550A (en) * | 2010-09-03 | 2011-02-09 | 深圳创维数字技术股份有限公司 | IP video stream multiplexing method and system thereof |
| CN101977286A (en) * | 2010-11-30 | 2011-02-16 | 福州大学 | Digital television program replacing device |
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| CN102523483A (en) * | 2011-12-27 | 2012-06-27 | 惠州市伟乐科技有限公司 | Method and device for transmission of control state information and multiple TSs |
| 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 |
| CN102665104A (en) * | 2012-05-09 | 2012-09-12 | 中国科学院声学研究所 | Parallel multiplexing method and device for transport streams |
| CN103702141A (en) * | 2013-12-17 | 2014-04-02 | 惠州市伟乐科技有限公司 | System for multiplexing video-on-demand program stream |
| CN108737889A (en) * | 2018-05-16 | 2018-11-02 | 青岛海信电器股份有限公司 | A kind of TS method for stream processing and digital multimedia reception device |
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| CN101710984A (en) * | 2009-12-04 | 2010-05-19 | 深圳创维数字技术股份有限公司 | Digital television program processing method based on PID reconstruction |
| CN101710984B (en) * | 2009-12-04 | 2013-06-26 | 深圳创维数字技术股份有限公司 | Digital television program processing method based on PID reconstruction |
| CN101969550A (en) * | 2010-09-03 | 2011-02-09 | 深圳创维数字技术股份有限公司 | IP video stream multiplexing method and system thereof |
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| CN101951387A (en) * | 2010-09-30 | 2011-01-19 | 海信集团有限公司 | Method and device for transmitting stream media |
| CN101977286A (en) * | 2010-11-30 | 2011-02-16 | 福州大学 | Digital television program replacing device |
| CN101977286B (en) * | 2010-11-30 | 2012-09-26 | 福州大学 | Digital television program replacing device |
| CN102098541B (en) * | 2010-12-11 | 2012-12-05 | 福州大学 | Code stream multiplexer constituting device |
| CN102098541A (en) * | 2010-12-11 | 2011-06-15 | 福州大学 | Code stream multiplexer constituting device |
| CN102523483A (en) * | 2011-12-27 | 2012-06-27 | 惠州市伟乐科技有限公司 | Method and device for transmission of control state information and multiple TSs |
| CN102523483B (en) * | 2011-12-27 | 2015-04-01 | 惠州市伟乐科技有限公司 | Method and device for transmission of control state information and multiple TSs |
| 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 |
| CN102665104A (en) * | 2012-05-09 | 2012-09-12 | 中国科学院声学研究所 | Parallel multiplexing method and device for transport streams |
| CN102665104B (en) * | 2012-05-09 | 2014-11-05 | 中国科学院声学研究所 | Parallel multiplexing method and device for transport streams |
| CN103702141A (en) * | 2013-12-17 | 2014-04-02 | 惠州市伟乐科技有限公司 | System for multiplexing video-on-demand program stream |
| CN103702141B (en) * | 2013-12-17 | 2017-03-29 | 惠州市伟乐科技有限公司 | A kind of system of video-on-demand program stream multiplexing |
| CN108737889A (en) * | 2018-05-16 | 2018-11-02 | 青岛海信电器股份有限公司 | A kind of TS method for stream processing and digital multimedia reception device |
| CN111726680A (en) * | 2020-06-17 | 2020-09-29 | 伟乐视讯科技股份有限公司 | Method and equipment for realizing EIT table multiplexing |
| 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 |
| CN111770364A (en) * | 2020-07-17 | 2020-10-13 | 上海国茂数字技术有限公司 | Video code rate smoothing method and device |
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