CN107493505A - A kind of apparatus and method for the video and audio transcoding for supporting dual-audio to export - Google Patents
A kind of apparatus and method for the video and audio transcoding for supporting dual-audio to export Download PDFInfo
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- CN107493505A CN107493505A CN201710969602.1A CN201710969602A CN107493505A CN 107493505 A CN107493505 A CN 107493505A CN 201710969602 A CN201710969602 A CN 201710969602A CN 107493505 A CN107493505 A CN 107493505A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 239000000284 extract Substances 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 9
- 101000969688 Homo sapiens Macrophage-expressed gene 1 protein Proteins 0.000 claims description 4
- 102100021285 Macrophage-expressed gene 1 protein Human genes 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012536 storage buffer Substances 0.000 claims description 3
- 230000005236 sound signal Effects 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 5
- 230000009977 dual effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
Abstract
The present invention relates to radio and television equipment technical field, more particularly to a kind of apparatus and method for the video and audio transcoding for supporting dual-audio to export, it includes mainboard, front panel, dual-audio the output process plate being arranged in casing and power panel, and the front panel, dual-audio output process plate and power panel are connected by wire with mainboard；The mainboard includes master cpu unit, audio/video decoding unit, code stream processing unit, Tuner processing units and CAM card processing units；It supports dual-audio output function by increasing in existing video and audio transcoder, realize re-encoding output audio-video signal after original audio/video program is decoded all the way, another way extracts the audio signal of original audio/video program, direct transparent transmission output original audio signal, dual audio signal after the vision signal multiplexing re-encoded with exporting, so as to realize that dual-audio exports；It has simple in construction, and cost is low, greatly improve operating efficiency and it is cost-effective the advantages that.
Description
Technical field
The present invention relates to radio and television equipment technical field, and in particular to a kind of video and audio transcoding for supporting dual-audio to export
Apparatus and method.
Background technology
The television network broadcast in China is basically completed digital improvement, while is speeding up to high Qinghua.TV programme
Mostly using the TS of video and audio compress coding（Transport Stream）Signal bit stream is transmitted, and therefore, video and audio, which is compiled, to be turned
Decoding apparatus is widely adopted in operator front end.In view of the set top box thousand poor ten thousand of the operator such as cable network, IPTV front end user
Not, the audio decoder form of support is also not quite similar, and what is had can only support MPEG1/2 compressed audio coding forms, and some may be used also
To support DD（Dolby Digital）Or DD+（Dolby Digital Plus）Compressed audio coding form.In order to be adapted to the greatest extent
Set-top box audio decoding more than possible, while and can meets the needs of part set top box decodes to high quality audio, if can open
Send out a kind of support dual-audio output video and audio transcoding apparatus and method, can provide double-audio signal give set top box selection solution
Code, wherein being all the way the audio signal of re-encoding, another way is the original audio signal of transparent transmission output, will greatly improve operator
The usage experience of user, increase user satisfaction.
The content of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide it is a kind of support dual-audio export regard sound
The apparatus and method of frequency transcoding, it supports dual-audio output function by increasing in existing video and audio transcoder, and it has
Simple in construction, cost is low, greatly improve operating efficiency and it is cost-effective the advantages that.
1. a kind of apparatus and method of video and audio transcoding for supporting dual-audio to export of the present invention, it includes being arranged on
Mainboard, front panel, dual-audio output process plate and power panel in casing, the front panel, dual-audio output process plate and power supply
Plate is connected by wire with mainboard；
It is characterized in that：The mainboard includes master cpu unit, audio/video decoding unit, code stream processing unit, Tuner processing
Unit and CAM card processing units, the master cpu unit and audio/video decoding unit, code stream processing unit, Tuner processing are single
Member, CAM cards processing unit, dual-audio output process plate and front panel are using electrical connection；The audio/video decoding unit passes through number
It is connected respectively with master cpu unit, code stream processing unit and dual-audio output process plate according to wire；The dual-audio output processing
Plate includes video re-encoding unit, coding unit, the transparent transmission processing unit of audio two and dual-audio and video multiplex are defeated again and again for audio
Go out unit；
It realizes dual-audio to keep the original tonequality of audio while dual-audio processing equipment complexity and cost is reduced
Output, using following method and step：
S1：Audio/video decoding unit completes the audio/video decoding of compression program, exports base band audio-video signal；
S2：Decoded base band audio-video signal is sent to dual-audio process plate and carries out audio frequency and video re-encoding, and wherein video re-encodes
Unit completes the H.264 Video coding of form or MPEG2 forms, and coding unit completes the audios such as MPEG1/2 or AAC to audio again and again
The re-encoding of form；
S3：The audiovisual compression signal multiplexing of re-encoding is audio-video code stream, at interval of a period of time extraction one under CPU controls
The PCR reference clocks of secondary audio-video code stream, and local 27MHz counting clocks are locked to PCR reference clocks, so as to produce local
PCR reference clocks；
S4：It is sent to the compression program of audio/video decoding unit while is sent to the transparent transmission processing unit of audio two of dual-audio process plate,
TS packet filterings are carried out first, extract audio PES program bags, then audio PES programs bag carries out storage buffering, is set according to user
The time value regulation storage buffer size put, meanwhile, replace audio PES program bags with above-mentioned caused local PCR reference clocks
Original PCR clocks, so as to realize labial synchronization；
S5：Audio PES programs bag is multiplexed with the audio-video code stream re-encoded in dual-audio and video multiplex output unit,
The code stream processing unit of mainboard is then delivered to, completes code stream format conversion, output includes video, the audio frequency and video of two tunnel audios all the way
Signal bit stream.
After said structure, the present invention has the beneficial effect that：It is of the present invention it is a kind of support dual-audio export regard sound
The apparatus and method of frequency transcoding, it supports dual-audio output function by increasing in existing video and audio transcoder, realizes one
Road will re-encoding output audio-video signal after the decoding of original audio/video program, another way is by the audio signal of original audio/video program
Extracting, direct transparent transmission exports original audio signal, and dual audio signal exports after being multiplexed with the vision signal re-encoded, from
And realize dual-audio and export；It has simple in construction, and cost is low, greatly improve operating efficiency and it is cost-effective the advantages that.
【Brief description of the drawings】
Accompanying drawing described herein is for providing a further understanding of the present invention, forming the part of the application, but not
Inappropriate limitation of the present invention is formed, in the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Description of reference numerals：
1st, casing；2nd, mainboard；21st, master cpu unit；22nd, audio/video decoding unit；23rd, code stream processing unit；24th, at Tuner
Manage unit；25th, CAM cards processing unit；3rd, front panel；4th, dual-audio output process plate；41st, video re-encoding unit；42nd, audio
Coding unit again and again；43rd, the transparent transmission processing unit of audio two；44th, dual-audio and video multiplex output unit；5th, power panel.
【Embodiment】
The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment, and illustrative examples therein and explanation are only
For explaining the present invention, but it is not as a limitation of the invention.
As shown in figure 1, a kind of described in present embodiment support the video and audio transcoding that dual-audio exports device and
Method, it includes being arranged on mainboard 2 in casing 1, front panel 3, dual-audio output process plate 4 and power panel 5, the front panel 3,
Dual-audio exports process plate 4 and power panel 5 is connected by wire with mainboard 2；
The mainboard 2 includes master cpu unit 21, audio/video decoding unit 22, code stream processing unit 23, Tuner processing units
24 and CAM cards processing unit 25, the master cpu unit 21 and audio/video decoding unit 22, code stream processing unit 23, Tuner
Processing unit 24, CAM cards processing unit 25, dual-audio output process plate 4 and front panel 3 are using electrical connection；The audio frequency and video solution
Code unit 22 exports the phase of process plate 4 with master cpu unit 21, code stream processing unit 23 and dual-audio respectively by data conductor
Even；Dual-audio output process plate 4 include video re-encoding unit 41, audio again and again coding unit 42, at the transparent transmission of audio two
Manage unit 43 and dual-audio and video multiplex output unit 44；
It realizes dual-audio to keep the original tonequality of audio while dual-audio processing equipment complexity and cost is reduced
Output, using following method and step：
S1：Audio/video decoding unit completes the audio/video decoding of compression program, exports base band audio-video signal；
S2：Decoded base band audio-video signal is sent to dual-audio process plate and carries out audio frequency and video re-encoding, and wherein video re-encodes
Unit completes the H.264 Video coding of form or MPEG2 forms, and coding unit completes the audios such as MPEG1/2 or AAC to audio again and again
The re-encoding of form；
S3：The audiovisual compression signal multiplexing of re-encoding is audio-video code stream, at interval of a period of time extraction one under CPU controls
The PCR reference clocks of secondary audio-video code stream, and local 27MHz counting clocks are locked to PCR reference clocks, so as to produce local
PCR reference clocks；
S4：It is sent to the compression program of audio/video decoding unit while is sent to the transparent transmission processing unit of audio two of dual-audio process plate,
TS packet filterings are carried out first, extract audio PES program bags, then audio PES programs bag carries out storage buffering, is set according to user
The time value regulation storage buffer size put, meanwhile, replace audio PES program bags with above-mentioned caused local PCR reference clocks
Original PCR clocks, so as to realize labial synchronization；
S5：Audio PES programs bag is multiplexed with the audio-video code stream re-encoded in dual-audio and video multiplex output unit,
The code stream processing unit of mainboard is then delivered to, completes code stream format conversion, output includes video, the audio frequency and video of two tunnel audios all the way
Signal bit stream.
Advantages of the present invention is as follows：It exports processing function and code stream by built-in audio/video decoding function, dual-audio
Processing function, realize that re-encoding output audio-video signal, another way regard original sound after original audio/video program is decoded all the way
The audio signal of frequency program extracts, and direct transparent transmission exports original audio signal.Dual audio signal and the video of re-encoding
Exported after signal multiplexing, so as to realize that dual-audio exports.The Highgrade integration, low of product is realized by embedded IC integrated circuits
Cost.
A kind of apparatus and method of video and audio transcoding for supporting dual-audio to export of the present invention, it passes through existing
Dual-audio output function is supported in increase in video and audio transcoder, and it has simple in construction, and cost is low, greatly improves operating efficiency
And the advantages that cost-effective.
Described above is only the better embodiment of the present invention, therefore all constructions according to described in present patent application scope,
The equivalent change or modification that feature and principle are done, is included in the range of present patent application.
Claims (2)
1. a kind of apparatus and method for the video and audio transcoding for supporting dual-audio to export, it includes being arranged on mainboard in casing, preceding
Panel, dual-audio output process plate and power panel, the front panel, dual-audio output process plate and power panel pass through wire and mainboard
It is connected；
It is characterized in that：The mainboard includes master cpu unit, audio/video decoding unit, code stream processing unit, Tuner processing
Unit and CAM card processing units, the master cpu unit and audio/video decoding unit, code stream processing unit, Tuner processing are single
Member, CAM cards processing unit, dual-audio output process plate and front panel are using electrical connection；The audio/video decoding unit passes through number
It is connected respectively with master cpu unit, code stream processing unit and dual-audio output process plate according to wire；The dual-audio output processing
Plate includes video re-encoding unit, coding unit, the transparent transmission processing unit of audio two and dual-audio and video multiplex are defeated again and again for audio
Go out unit.
2. a kind of apparatus and method of video and audio transcoding for supporting dual-audio to export according to claim 1, its feature exist
In：It realizes dual-audio to keep the original tonequality of audio while dual-audio processing equipment complexity and cost is reduced
Output, using following method and step：
S1：Audio/video decoding unit completes the audio/video decoding of compression program, exports base band audio-video signal；
S2：Decoded base band audio-video signal is sent to dual-audio process plate and carries out audio frequency and video re-encoding, and wherein video re-encodes
Unit completes the H.264 Video coding of form or MPEG2 forms, and coding unit completes the audios such as MPEG1/2 or AAC to audio again and again
The re-encoding of form；
S3：The audiovisual compression signal multiplexing of re-encoding is audio-video code stream, at interval of a period of time extraction one under CPU controls
The PCR reference clocks of secondary audio-video code stream, and local 27MHz counting clocks are locked to PCR reference clocks, so as to produce local
PCR reference clocks；
S4：It is sent to the compression program of audio/video decoding unit while is sent to the transparent transmission processing unit of audio two of dual-audio process plate,
TS packet filterings are carried out first, extract audio PES program bags, then audio PES programs bag carries out storage buffering, is set according to user
The time value regulation storage buffer size put, meanwhile, replace audio PES program bags with above-mentioned caused local PCR reference clocks
Original PCR clocks, so as to realize labial synchronization；
S5：Audio PES programs bag is multiplexed with the audio-video code stream re-encoded in dual-audio and video multiplex output unit,
The code stream processing unit of mainboard is then delivered to, completes code stream format conversion, output includes video, the audio frequency and video of two tunnel audios all the way
Signal bit stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710969602.1A CN107493505B (en) | 2017-10-18 | 2017-10-18 | Device and method for video and audio transcoding supporting dual audio output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710969602.1A CN107493505B (en) | 2017-10-18 | 2017-10-18 | Device and method for video and audio transcoding supporting dual audio output |
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| CN107493505A true CN107493505A (en) | 2017-12-19 |
| CN107493505B CN107493505B (en) | 2023-12-26 |
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2017
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| EP1168651A2 (en) * | 2000-06-30 | 2002-01-02 | Hitachi Ltd. | Optimising audio coding through re-encoding |
| CN101098483A (en) * | 2007-07-19 | 2008-01-02 | 上海交通大学 | Video cluster transcoding system using image group structure as parallel processing element |
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