CN101662637A - Method for playing all packaged programs in transmission code stream and set-top box - Google Patents
Method for playing all packaged programs in transmission code stream and set-top box Download PDFInfo
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- CN101662637A CN101662637A CN200910190720A CN200910190720A CN101662637A CN 101662637 A CN101662637 A CN 101662637A CN 200910190720 A CN200910190720 A CN 200910190720A CN 200910190720 A CN200910190720 A CN 200910190720A CN 101662637 A CN101662637 A CN 101662637A
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Abstract
The invention discloses a method for playing all packaged programs in a transmission code stream and a set-top box. The method comprises: completely demultiplexing the group packets of all programs inthe transmission code stream by setting a PID filter, demultiplexing the independent PES packets corresponding to each program, respectively sending the independent PES packets to different positionsor buffer areas in an internal storage through a DMA transmission unit; decoding the PES packets of different programs in the internal storage through a video decoder, and temporarily storing the decoding results of different programs at the different positions or buffer areas of the internal storage; coding and carrying out video complex processing on the decoded video temporarily stored in theinternal storage by a video coding processing unit; and outputting a video processing result. The invention is capable of improving the speed of changing programs and the operation of the user is convenient.
Description
Technical field
The present invention relates to set-top box (DVB, Digital Video Broadcasting) technology, relate in particular to a kind of method and set-top box of playing the program of all packing in the transmission code stream.
Background technology
What the system coding technology great majority that Digital Television adopts at present adopted is the transport stream technology, as the DVB standard, can be packaged into one by one independently PES grouping bag (program bag) to the source code flow after a few programs encoding compression by packetizing, each PES grouping bag is by a unique Packet Identifier (PID) identification, and then utilize multiplex technique to be multiplexed into a cover transmission code stream, promptly a cover transport stream carries a few cover TVs and audio program usually.The transmission code stream that every suit carries multiple programs be modulated onto one independently physical channel broadcast away by network then by modulators modulate is whole.One independently physical channel take the 8M bandwidth usually, though such cover television system has only tens physical channel usually, can transmit the TV programme and the broadcast program of hundreds of cover simultaneously, the utilization rate of bandwidth is provided.
The digital TV terminal set-top box is when receiving and watch certain cover TV programme at present, at first be tuned to one carry on this TV programme corresponding physical channel frequency, demodulate corresponding transmission code stream, and then go out the grouping bag (PES bag) of this program PID correspondence by descrambling and PID filter demultiplexing, this grouping bag sends decoder to by DMA again and decodes, the digital video frequency flow that decodes is encoded as the signal that meets analog video signal standard by a video encoder then, gives television set and shows.
Multiple programs in this process in transport stream has only program decoded and show, the user can only see a cover TV programme simultaneously, if a cover system comprises the hundreds of programs, the user is in order to have browsed whole programs, program switches one by one, the very big inconvenience that can cause the user to use.
Therefore, along with popularizing of digital television techniques and reaching its maturity and enriching constantly of operation mode, and the magnanimity of set-top box users increases, how to improve the platform speed of changing, make the user easy to use, make product have more the market competitiveness, become problem anxious to be solved.
Summary of the invention
The objective of the invention is to disclose a kind of method and set-top box of playing the program of all packing in the transmission code stream, can improve and change platform speed, make the user easy to use.
For solving technical problem of the present invention, the present invention discloses a kind of method of playing the program of all packing in the transmission code stream, wherein, comprising:
By the whole demultiplexings of PID filter are set, wherein, the independently PES of each program correspondence that demultiplexing goes out wraps the grouping bag of the whole programs in the transport stream;
Described independently PES bag is delivered to different positions or buffering area in the internal memory respectively by the DMA transmission unit;
One or several Video Decoder is decoded to the PES bag of the different programs in the described internal memory respectively, and the decoded result of described different programs is also by temporary diverse location or buffering area in described internal memory;
The video coding processing unit is encoded respectively and the video Combined Processing keeping in the video that decodes in the described internal memory;
The video coding of several programs and final video result are exported, and show by television set.
More excellent, described video output display mode adopts the compound output of picture.
More excellent, also comprise: described Video Decoder is according to the PES bag respectively decoding of picture output form to different programs.
More excellent, also comprise: audio decoding unit is decoded to the audio packet bag of delivering to audio buffer, the current sound of choosing program of output user.
For solving technical problem of the present invention, the present invention also discloses a kind of set-top box, wherein, comprising:
Demodulation multiplexer, be used for the transmission code stream that correspondence contains multi-channel program and carry out demultiplexing, choose the video packets bag and a tunnel of whole programs of wherein packing the audio packet bag demultiplexing of program to come out, and deliver in the different core buffers by the DMA transmission unit;
The DMA transmission unit is used to transmit the data through behind the described demodulation multiplexer demultiplexing;
Internal memory is used to store the data that described DMA transmission unit transmission comes, and comprises audio data buffer and video data buffer;
Video Decoder, the multi-channel program video packets bag that is used for described DMA transmission unit is delivered to the different buffering area of described internal memory carries out video decode respectively, the decoded result of different program bags also be sent to described internal memory open up different buffering areas in;
Video processing unit is used for the decoded result of the different programs that are temporary in described core buffer is encoded, the TV signal of outputting standard standard, and, carry out Video processing according to different display modes, the output result delivers to television set and shows.
More excellent, also comprise:
Audio decoding unit, the audio packet bag of having delivered to described core buffer by described DMA transmission unit that is used for program correspondence that the active user is chosen carries out audio decoder, output sound.
More excellent, described video processing unit also is used for according to the way of output difference coding result being carried out multi-form compound output, and carries out other Video processing operation.
More excellent, save as the PES internal memory in described, be used for the data that described DMA transmission unit transmits are divided into video data and voice data two parts, described video Data Transmission is to described Video Decoder, and described audio data transmission is to described audio decoder.
More excellent, save as the PES internal memory in described, be used for the data that described DMA transmission unit transmits are passed to first decoder and second decoder,
Described first decoder is used for being absorbed in the decoding of choosing program, guarantees the program quality of this road program;
Described second decoder, timesharing is decoded to the program grouping bag of remainder, and adopts CPU to carry out soft decoding.
More excellent, described second decoder also is used for only key frame being decoded.
Compared with prior art, the present invention has following beneficial effect:
The present invention discloses a kind of method and the set-top box that can play the program of all packing in the transmission code stream, can improve and change platform speed, makes the user easy to use.The user can watch the whole TV programme that comprise in the cover code stream simultaneously, when switching program between the program of user in a cover code stream, only need the passage of switching encoding/decoding to get final product, therefore improved the speed of changing platform, the user only needs to switch between a spot of physical channel in addition, just can browse hundreds of and overlap whole TV programme, user-friendly.The user can also select various video display modes such as mosaic and picture-in-picture to show and browse multiple programs in addition.
Description of drawings
Fig. 1 is the method flow schematic diagram of whole packing programs in the disclosed transmission code stream of the embodiment of the invention;
Fig. 2 is the electrical block diagram of a kind of set-top box of the embodiment of the invention;
Fig. 3 is the electrical block diagram of the another kind of set-top box of the embodiment of the invention;
Fig. 4 is the electrical block diagram of the another kind of set-top box of the embodiment of the invention.
Specific embodiment
The present invention discloses a kind of method and the set-top box that can play the program of all packing in the transmission code stream, can improve and change platform speed, makes the user easy to use.
As described in Figure 1, be the method flow schematic diagram of the program of all packing in the disclosed transmission code stream of the embodiment of the invention, this method mainly comprises the steps.
Wherein, video output display mode can adopt the compound output of picture, comprises that picture-in-picture form and mosaic browse form.
Video Decoder is according to the PES bag respectively decoding of picture output form to different programs.
Audio decoding unit is decoded to the audio packet bag of delivering to audio buffer, the current sound of choosing program of output user.
Wherein, decoder can be CPU, also can be the DSP digital signal processor.
As described in Figure 2, be the electrical block diagram of a kind of set-top box of the embodiment of the invention, set-top box of the present invention mainly comprises: host CPU 101, demodulator 102, descrambler 103, demodulation multiplexer 104, DMA transmission unit 105, audio frequency core buffer 106, audio decoding unit 107, video memory buffer 108, one or several video decoder unit 109, video processing unit 110 and a smart card 111.
Described host CPU 101 connects all unit, described demodulator 102, descrambler 103, demodulation multiplexer 104 are connected successively with DMA transmission unit 105, the output of described DMA transmission unit 105 is divided into two-way, one the tunnel connects the described audio frequency core buffer 106 and the described audio decoding unit 107 of series connection successively, and another road connects described video memory buffer 108, video decoder unit 109 and the described video processing unit 110 of series connection successively.Described smart card 111 connects described descrambler 103.
Described host CPU 101 is used for executive software, controls other unit and carries out proper operation.
Described demodulator 102 is used for demodulating transport stream from high-frequency signal.
Described descrambler 103 is used for carrying out the descrambling of encrypting code stream under the cooperation of described smart card 111.
Described demodulation multiplexer 104, be used for going out each program grouping bag from the decrypted transport stream demultiplexing of described demodulator 102 demodulation and described descrambler 103 descramblings of process, and deliver in the different core buffers by described DMA transmission unit 105, in for example described audio frequency core buffer 106 and described video memory buffer 108.
Described DMA transmission unit 105 is used to transmit the data through behind described demodulation multiplexer 104 demultiplexings, also is used for one tunnel TV programme corresponding audio grouping bag is delivered to corresponding described audio frequency core buffer 106, for described audio decoding unit 107 decodings.
One or several video decoder unit 109, the multi-channel program video packets bag that is used for described DMA transmission unit 105 is delivered to different core buffers carries out video decode respectively, the decoded result of different program bags also be sent to internal memory open up different buffering areas in.
Described video processing unit 110, be used for the decoded result of the different programs that are temporary in described video memory buffer 108 is encoded, the TV signal of outputting standard standard, and according to different display modes, carry out Video processing and compound, the output result delivers to television set and shows.
A described audio decoding unit 107, the audio packet bag of having delivered to described audio frequency core buffer 106 by described DMA unit 105 that is used for program correspondence that the active user is chosen carries out audio decoder, output sound.
As shown in Figure 3, be the electrical block diagram of the another kind of set-top box of another embodiment of the present invention, this set-top box is used the example of a video decoding unit and an audio decoding unit.As shown in Figure 3, this set-top box can comprise: demodulation multiplexer 201, DMA transmission unit 202, PES internal memory 203, Video Decoder 204, FRAME internal memory 205, video coding processing unit 206 and audio decoder 207.
Described demodulation multiplexer 201, DMA transmission unit 202, PES internal memory 203, Video Decoder 204, FRAME internal memory 205 is connected successively with video coding processing unit 206, and described PES internal memory 203 is connected with described audio decoder 207.
Described demultiplexing unit 201, be used for a transmission code stream (for example TS stream) that contains multi-channel program is carried out demultiplexing, choose the video packets bag and a tunnel of whole programs of wherein packing audio packet bag (PES bag) demultiplexing of program to come out, and deliver to respectively in the several separate PES buffer memory cache district 203 that internal memory is opened up by described DMA transmission unit 202.
Described DMA transmission unit 202 is used to transmit the data behind described demultiplexing unit 201 demultiplexings.
Described PES buffer memory cache district 203, can distribute several separate PES buffer zone therein, each PESbuffer zone is used to adopt the audio frequency and video PES data of the different programs that the described DMA transmission unit 202 of form buffer memory of circulation BUFFER transmits.
Described Video Decoder 204, be used for several roads video packets bag that will show being decoded respectively by the electronic switch switching, and the video decode result of different programs is delivered in the corresponding different FRAMEBUFFER internal memories of opening up in internal memory 205 according to the display mode difference.
Described FRAME BUFFER internal memory 205 also can distribute several separate FRAME BUFFER zone, is used for the data of the different programs behind described Video Decoder 204 video decodes of buffer memory respectively.
Described video processing unit 206, be used for independently encoding according to the video standard (PAL, NTSC etc.) of standard according to the video decode result of way of output difference to one or several FRAME BUFFER zone of wanting the display program correspondence, video processing unit 206, also be used for coding result being carried out multi-form compound output according to way of output difference, and carry out other Video processing operation, as convergent-divergent, system conversion etc.
Described audio decoding unit 207, the audio packet bag of having delivered to described PES buffer memory cache district 203 by described DMA unit 202 that is used for program correspondence that the active user is chosen carries out audio decoder, output sound.
Present embodiment can adopt the output of mosaic form to multi-channel video, each road video takies a little unit of television image, the user can one television image carry out in the current physical channel all browse displays of programs, at this moment Video Decoder 204 need switch by electronic switch the video packets bag that all receives and carry out the timesharing decoding, video coding processing unit 206 is same to be handled corresponding program video source under the switching of electronic switch and compound, and exports the display result after compound.The user can select in the unit that shows under this mode, choose wherein certain program, and choosing program to be displayed in full screen, when full screen display, DMA transmission unit 202 is only to transmitting the grouping bag of this program among the PES BUFFER203 of this program correspondence, the dma transmission is wrapped no longer in the grouping of other program, and Video Decoder 204 and video coding processing unit 206 be also only to the output of decoding and encode of the corresponding bag of this program, no longer timesharing switching and handle different buffer cells.
Present embodiment also can adopt the output of picture-in-picture form to multi-channel video, at this moment the grouping bag of picture-in-picture display program is also only transmitted in the transmission of DMA transmission unit 202, Video Decoder 204 also only carries out the timesharing decoding to the video packets bag that shows, 206 decoded data to respective program of video coding processing unit are carried out video coding and processing, and the user also can choose switching in this pattern in different display units.
Decode and the output audio decoded result at the grouping bag that different display mode subaudio frequency decoding units is all only brought the selected cell program.
This realization example is had relatively high expectations to the decoding speed of Video Decoder, in order to reduce the requirement to the decoding speed of Video Decoder, can also adopt following embodiment.
As described in Figure 4, be the electrical block diagram of the another kind of set-top box of another embodiment of the present invention, this embodiment and above embodiment key difference are to adopt two decoders.
Described set-top box comprises: demodulation multiplexer 301, DMA transmission unit 302, PES internal memory 303, the first decoders 304, FRAME internal memory 305, video coding processing unit 306 and second decoder 307.
Described demodulation multiplexer 301, DMA transmission unit 302, PES internal memory 303 are connected successively, and described PES internal memory 303 is divided into two-way, connects described first decoder 304 and second decoder 307 respectively.Described first decoder 304 and second decoder 307 all are connected the input of described FRAME internal memory 305, and the output of described FRAME internal memory 305 is connected with video coding processing unit 306.
Described demultiplexing unit 301, be used for a transmission code stream (for example TS stream) that contains multi-channel program is carried out demultiplexing, choose the video packets bag and a tunnel of whole programs of wherein packing audio packet bag (PES bag) demultiplexing of program to come out, and deliver in the described PES buffer memory cache district 303 by described DMA transmission unit 302.
Described DMA transmission unit 302 is used to transmit the data behind described demultiplexing unit 301 demultiplexings.
Described PES buffer memory cache district 303,, can distribute several separate PES buffer zone therein, the data that each PES buffer zone is used to adopt the described DMA transmission unit 302 of form buffer memory of circulation BUFFER to transmit.
Described first decoder 304 is used for being absorbed in the decoding of choosing program, guarantees the program quality of this road program, guarantees decoding quality as adopting the hard decoder device; Owing to remaining do not choose program only to play a user to browse program, therefore decoding quality is required and can reduce, therefore adopt 307 timesharing of another one second decoder that the program grouping bag of remainder is decoded, and can adopt CPU to carry out soft decoding, and can only decode key frame.
Described FRAME BUFFER internal memory 305 also can distribute several separate FRAME BUFFER zone, is used for the data of described first decoder 304 of buffer memory and second decoder, 307 decoded different programs.
Described video coding processing unit 306, be used for independently encoding according to the video standard (PAL, NTSC etc.) of standard according to the video decode result of way of output difference to one or several FRAME BUFFER zone of wanting the display program correspondence, video processing unit 306, also be used for coding result being carried out multi-form compound output according to way of output difference, and carry out other Video processing operation, as convergent-divergent, system conversion etc.
More than in two kinds of schemes packet wrap between internal memory and the decoder and the transfer of data of decoded result between FRAME BUFFER and video coding can adopt the DMA transmission, and the buffering area that can distribute other is deposited other result, the ES original packet in analyzing from the PES bag as decoding unit, the interim result that video processing unit is handled and capture buffer etc.
In sum, the present invention discloses a kind of method and the set-top box that can play the program of all packing in the transmission code stream, can improve and change platform speed, makes the user easy to use.The user can watch the whole TV programme that comprise in the cover code stream simultaneously, when switching program between the program of user in a cover code stream, only need the passage of switching encoding/decoding to get final product, therefore improved the speed of changing platform, the user only needs to switch between a spot of physical channel in addition, just can browse hundreds of and overlap whole TV programme, user-friendly.The user can also select various video display modes such as mosaic and picture-in-picture to show and browse multiple programs in addition.
Claims (10)
1, a kind of method of playing the program of all packing in the transmission code stream is characterized in that, comprising:
By the whole demultiplexings of PID filter are set, wherein, the independently PES of each program correspondence that demultiplexing goes out wraps the grouping bag of the whole programs in the transport stream;
Described independently PES bag is delivered to different positions or buffering area in the internal memory respectively by the DMA transmission unit;
One or several Video Decoder is decoded to the PES bag of the different programs in the described internal memory respectively, and the decoded result of described different programs is also by temporary diverse location or buffering area in described internal memory;
The video coding processing unit is encoded respectively and the video Combined Processing keeping in the video that decodes in the described internal memory;
The video coding of several programs and final video result are exported, and show by television set.
2, the method for claim 1 is characterized in that, described video output display mode adopts the compound output of picture.
3, method as claimed in claim 2 is characterized in that, also comprises:
Described Video Decoder is according to the PES bag respectively decoding of picture output form to different programs.
4, the method for claim 1 is characterized in that, also comprises:
Audio decoding unit is decoded to the audio packet bag of delivering to audio buffer, the current sound of choosing program of output user.
5, a kind of set-top box is characterized in that, comprising:
Demodulation multiplexer, be used for the transmission code stream that correspondence contains multi-channel program and carry out demultiplexing, choose the video packets bag and a tunnel of whole programs of wherein packing the audio packet bag demultiplexing of program to come out, and deliver in the different core buffers by the DMA transmission unit;
The DMA transmission unit is used to transmit the data through behind the described demodulation multiplexer demultiplexing;
Internal memory is used to store the data that described DMA transmission unit transmission comes, and comprises audio data buffer and video data buffer;
Video Decoder, the multi-channel program video packets bag that is used for described DMA transmission unit is delivered to the different buffering area of described internal memory carries out video decode respectively, the decoded result of different program bags also be sent to described internal memory open up different buffering areas in;
Video processing unit is used for the decoded result of the different programs that are temporary in described core buffer is encoded, the TV signal of outputting standard standard, and, carry out Video processing according to different display modes, the output result delivers to television set and shows.
6, set-top box as claimed in claim 5 is characterized in that, also comprises:
Audio decoding unit, the audio packet bag of having delivered to described core buffer by described DMA transmission unit that is used for program correspondence that the active user is chosen carries out audio decoder, output sound.
7, set-top box as claimed in claim 5 is characterized in that, described video processing unit also is used for according to the way of output difference coding result being carried out multi-form compound output, and carries out other Video processing operation.
8, set-top box as claimed in claim 6, it is characterized in that, save as the PES internal memory in described, be used for the data that described DMA transmission unit transmits are divided into video data and voice data two parts, described video Data Transmission is to described Video Decoder, and described audio data transmission is to described audio decoder.
9, set-top box as claimed in claim 5 is characterized in that, saves as the PES internal memory in described, be used for the data that described DMA transmission unit transmits are passed to first decoder and second decoder,
Described first decoder is used for being absorbed in the decoding of choosing program, guarantees the program quality of this road program;
Described second decoder, timesharing is decoded to the program grouping bag of remainder, and adopts CPU to carry out soft decoding.
10, set-top box as claimed in claim 9 is characterized in that, described second decoder also is used for only key frame being decoded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910190720A CN101662637A (en) | 2009-09-25 | 2009-09-25 | Method for playing all packaged programs in transmission code stream and set-top box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910190720A CN101662637A (en) | 2009-09-25 | 2009-09-25 | Method for playing all packaged programs in transmission code stream and set-top box |
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| CN101662637A true CN101662637A (en) | 2010-03-03 |
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| CN200910190720A Pending CN101662637A (en) | 2009-09-25 | 2009-09-25 | Method for playing all packaged programs in transmission code stream and set-top box |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102301730A (en) * | 2011-07-18 | 2011-12-28 | 华为技术有限公司 | Method, device and system for transmitting and processing multichannel AV |
| WO2014015688A1 (en) * | 2012-07-25 | 2014-01-30 | 华为技术有限公司 | Method, device and system for processing multimedia data |
| CN103701624B (en) * | 2013-12-31 | 2017-06-06 | 广东公信智能会议股份有限公司 | A kind of voice data sound mixing method and device |
| CN108737886A (en) * | 2017-04-25 | 2018-11-02 | 澜至电子科技（成都）有限公司 | Fast switching system, method and the top box of digital machine of digital program |
| CN109922330A (en) * | 2017-12-13 | 2019-06-21 | 北京传送科技有限公司 | Data transmission method for uplink, data receiver method and device |
| CN111736796A (en) * | 2020-05-15 | 2020-10-02 | 深圳市战音科技有限公司 | Real-time stream data processing method, device, equipment and storage medium |
-
2009
- 2009-09-25 CN CN200910190720A patent/CN101662637A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102301730A (en) * | 2011-07-18 | 2011-12-28 | 华为技术有限公司 | Method, device and system for transmitting and processing multichannel AV |
| WO2012106898A1 (en) * | 2011-07-18 | 2012-08-16 | 华为技术有限公司 | Method, device and system for transmitting and processing multi-channel audio-video |
| WO2014015688A1 (en) * | 2012-07-25 | 2014-01-30 | 华为技术有限公司 | Method, device and system for processing multimedia data |
| CN103701624B (en) * | 2013-12-31 | 2017-06-06 | 广东公信智能会议股份有限公司 | A kind of voice data sound mixing method and device |
| CN108737886A (en) * | 2017-04-25 | 2018-11-02 | 澜至电子科技（成都）有限公司 | Fast switching system, method and the top box of digital machine of digital program |
| CN109922330A (en) * | 2017-12-13 | 2019-06-21 | 北京传送科技有限公司 | Data transmission method for uplink, data receiver method and device |
| CN109922330B (en) * | 2017-12-13 | 2021-11-16 | 北京传送科技有限公司 | Data sending method, data receiving method and device |
| CN111736796A (en) * | 2020-05-15 | 2020-10-02 | 深圳市战音科技有限公司 | Real-time stream data processing method, device, equipment and storage medium |
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Application publication date: 20100303 |