CN105611317A - Video-audio transcoding device and method capable of supporting audio unvarnished transmission - Google Patents
Video-audio transcoding device and method capable of supporting audio unvarnished transmission Download PDFInfo
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- CN105611317A CN105611317A CN201610029488.XA CN201610029488A CN105611317A CN 105611317 A CN105611317 A CN 105611317A CN 201610029488 A CN201610029488 A CN 201610029488A CN 105611317 A CN105611317 A CN 105611317A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000000284 extract Substances 0.000 claims description 8
- 230000005236 sound signal Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/233—Processing of audio elementary streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio and video streams
-
- 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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
This invention relates to the technical field of radio and television equipment, specifically relating to a video-audio transcoding device and method capable of supporting audio unvarnished transmission. The device comprises a system control module, a video-audio input module, a video coding and decoding module, a code stream output module and a power module; the device further comprises an audio unvarnished transmission module and a video-audio multiplexing module; the system control module is electrically connected with the video-audio input module, the video coding and decoding module, the code stream output module, the power module, the audio unvarnished transmission module and the video-audio multiplexing module. By adding the function of audio unvarnished transmission outputting on the existing video-audio transcoder, the complexity and the cost of the coding and decoding equipment are reduced; the original acoustical quality is kept to the maximum extent; and thus, the device has the advantages of simple structure, low cost, greatly improving the work efficiency, saving the cost, etc.
Description
Technical field
The present invention relates to radio and television equipment technical field, particularly a kind of sound of looking of supporting audio frequency transparent transmissionFrequently the apparatus and method of transcoding.
Background technology
Along with popularizing fast of DTV, operator's cable network adopts Digital Transmission technology to enter one after anotherThe transmission of row broadcast TV program, TV programme mostly adopt the TS (Transport of video and audio compressed encodingStream) signal bit stream transmits, and therefore, video and audio is compiled transcoding equipment at operator's front end quilt extensivelyAdopt. Meanwhile, bandwidth is the most valuable resource of operator all the time, and operator is for different TV programmeDifferent video encoding code checks need to be set, for the situation of rebroadcast television program, need this electricityCode check depending on program transcoding (the then recompile of first decoding) for oneself needing. For audio signal,Present high-definition television program mostly adopts DD (DolbyDigital) or DD+ (DolbyDigitalPlus) audio compression coded format, if adopt DD or DD+ coding, needs by coded audio passageNumber is paid high license expense to Dolby company. Therefore, in the time of video and audio transcoding, if canProviding a kind of can, by the apparatus and method of TV programme original audio signal transparent transmission output, can saveLicense expense can also keep audio frequency in reducing coding/decoding apparatus complexity, reducing costsOriginal tonequality.
Summary of the invention
The object of the invention is to defect and deficiency for prior art, provide a kind of simple in structure, establishThe apparatus and method of counting a kind of video and audio transcoding of supporting audio frequency transparent transmission reasonable, easy to use, it passes throughIn existing video and audio transcoder, increase and support audio frequency transparent transmission output function, it has simple in structure, becomesThis is low, has greatly improved operating efficiency and the advantage such as cost-saving.
For achieving the above object, the technical solution used in the present invention is:
The apparatus and method of a kind of video and audio transcoding of supporting audio frequency transparent transmission of the present invention, it comprises and isSystem control module, video and audio input module, coding and decoding video module, code stream output module, power module,It also comprises audio frequency transparent transmission module, video and audio Multiplexing module; Described system control module respectively with video and audioInput module, coding and decoding video module, code stream output module, power module, audio frequency transparent transmission module and lookThe electrical connection of audio-frequency multiplex module;
It is in order to keep the original tonequality of audio frequency in reducing coding/decoding apparatus complexity and cost, realExisting audio frequency transparent transmission, adopts following method step:
S1: the ASI serial bit stream signal of input is converted to the parallel signal bit stream of SPI;
S2: extract video ES code stream from the parallel code stream of SPI, deliver to video decoding chip and be decoded into baseBand digital video signal; Then baseband digital video signal is delivered to video coding chip and is carried out recompile,To complete video format conversion, conversion of resolution and rate conversion etc.;
S3: extract audio ES code stream from the parallel code stream of SPI, deliver to delay process chip, time delay placeThe audio code stream signal of reason is synchronizeed and is corrected with video code flow signal;
S4: video code flow signal and audio code stream signal are joined according to the PID of user's setting and other codingsNumber carries out multiplexing;
S5: parallel multiplexing SPI TS code stream is converted to the output of ASI serial TS code stream, establishes for rear classStandby use.
Adopt after said structure, beneficial effect of the present invention is: a kind of audio frequency transparent transmission of supporting of the present inventionThe apparatus and method of video and audio transcoding, it supports audio frequency by increasing in existing video and audio transcoderTransparent transmission output function, by the video ES code stream in TS code stream is independently decoded and recompile, audio frequencyES code stream is direct transparent transmission after delay process, then by the audio frequency of the video code flow of recompile and transparent transmissionCode stream multiplex output, both can ensure that Audio and Video is synchronous, can reduce again the complexity of coding/decoding apparatusSpend and cost, and keep to greatest extent the original tonequality of audio frequency, it has simple in structure, and cost is low,Operating efficiency and the advantage such as cost-saving are greatly improved.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is FB(flow block) of the present invention.
Description of reference numerals:
1, system control module; 2, video and audio input module; 3, coding and decoding video module; 4, code streamOutput module; 5, audio frequency transparent transmission module; 6, video and audio Multiplexing module; 7, power module.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, device and the side of a kind of video and audio transcoding of supporting audio frequency transparent transmission of the present inventionMethod, it comprises that system control module 1, video and audio input module 2, coding and decoding video module 3, code stream are defeatedGo out module 4, power module 7, it also comprises audio frequency transparent transmission module 5, video and audio Multiplexing module 6; DescribedSystem control module 1 respectively with video and audio input module 2, coding and decoding video module 3, code stream output module4, power module 7, audio frequency transparent transmission module 5 and video and audio Multiplexing module 6 are electrically connected;
Described video and audio input module 2 is by the ASI (AsynchronousSerialInterface) of inputSerial bit stream signal is converted to the parallel signal bit stream of SPI (SynchronousParallelInterface),Be convenient to rear class device processes;
Described coding and decoding video module 3 extracts video ES (ElementStream) from the parallel code stream of SPICode stream, delivers to video decoding chip and is decoded into baseband digital video signal. Then baseband digital video is believedNumber deliver to video coding chip and carry out recompile, with complete video format conversion, conversion of resolution andRate conversion etc.;
Described audio frequency transparent transmission module 5 extracts audio ES code stream from the parallel code stream of SPI, delivers to time delay placeReason chip, the audio code stream signal of delay process is synchronizeed and is corrected with video code flow signal;
Described video and audio Multiplexing module 6 arranges video code flow signal and audio code stream signal according to userPID and other coding parameters carry out multiplexing;
Described code stream output module 4 turns parallel multiplexing SPI TS (TransportStream) code streamBe changed to the output of ASI serial TS code stream, for rear class equipment;
Described system control module 1 is given video and audio input module 2, coding and decoding video module 3, audio frequency transparent transmissionModule 5, video and audio Multiplexing module 6 and code stream output module 4 provide control signal, so that each module is coordinatedConsistent work, and provide power supply supply by described power module 7;
As shown in Figure 2, it in order to keep audio frequency in reducing coding/decoding apparatus complexity and costOriginal tonequality, realizes audio frequency transparent transmission, adopts following method step:
S1: the ASI serial bit stream signal of input is converted to the parallel signal bit stream of SPI;
S2: extract video ES code stream from the parallel code stream of SPI, deliver to video decoding chip and be decoded into baseBand digital video signal. Then baseband digital video signal is delivered to video coding chip and is carried out recompile,To complete video format conversion, conversion of resolution and rate conversion etc.;
S3: extract audio ES code stream from the parallel code stream of SPI, deliver to delay process chip, time delay placeThe audio code stream signal of reason is synchronizeed and is corrected with video code flow signal;
S4: video code flow signal and audio code stream signal are joined according to the PID of user's setting and other codingsNumber carries out multiplexing;
S5: parallel multiplexing SPI TS code stream is converted to the output of ASI serial TS code stream, establishes for rear classStandby use.
The apparatus and method of a kind of video and audio transcoding of supporting audio frequency transparent transmission of the present invention, it passes throughIn existing video and audio transcoder, increase and support audio frequency transparent transmission output function, by by the video in TS code streamES code stream is independently decoded and recompile, and audio ES code stream is direct transparent transmission after delay process, then willThe video code flow of recompile and the multiplexing output of the audio code stream of transparent transmission, so both can ensure video and soundFrequently synchronous, can reduce again complexity and the cost of coding/decoding apparatus, and keep to greatest extent audio frequencyOriginal tonequality, also, for operator saves high license expense, it has simple in structure, and cost is low,Operating efficiency and the advantage such as cost-saving are greatly improved.
The above is only preferred embodiments of the present invention, therefore all according to described in patent claim of the present inventionThe equivalence done of structure, feature and principle change or modify, be included in patent claim of the present inventionIn.
Claims (1)
1. support apparatus and method for the video and audio transcoding of audio frequency transparent transmission, it comprise system control module,Video and audio input module, coding and decoding video module, code stream output module, power module, is characterized in that:It also comprises audio frequency transparent transmission module, video and audio Multiplexing module; Described system control module respectively with video and audioInput module, coding and decoding video module, code stream output module, power module, audio frequency transparent transmission module and lookThe electrical connection of audio-frequency multiplex module;
It is in order to keep the original tonequality of audio frequency in reducing coding/decoding apparatus complexity and cost, realExisting audio frequency transparent transmission, adopts following method step:
S1: the ASI serial bit stream signal of input is converted to the parallel signal bit stream of SPI;
S2: extract video ES code stream from the parallel code stream of SPI, deliver to video decoding chip and be decoded into baseBand digital video signal; Then baseband digital video signal is delivered to video coding chip and is carried out recompile,To complete video format conversion, conversion of resolution and rate conversion etc.;
S3: extract audio ES code stream from the parallel code stream of SPI, deliver to delay process chip, time delay placeThe audio code stream signal of reason is synchronizeed and is corrected with video code flow signal;
S4: video code flow signal and audio code stream signal are joined according to the PID of user's setting and other codingsNumber carries out multiplexing;
S5: parallel multiplexing SPI TS code stream is converted to the output of ASI serial TS code stream, establishes for rear classStandby use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610029488.XA CN105611317A (en) | 2016-01-18 | 2016-01-18 | Video-audio transcoding device and method capable of supporting audio unvarnished transmission |
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| CN201610029488.XA CN105611317A (en) | 2016-01-18 | 2016-01-18 | Video-audio transcoding device and method capable of supporting audio unvarnished transmission |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106331846A (en) * | 2016-08-17 | 2017-01-11 | 青岛海信电器股份有限公司 | Audio transmission method and apparatus |
| CN107369457A (en) * | 2017-09-04 | 2017-11-21 | 成都德芯数字科技股份有限公司 | The voice data transmitting methods of AC 3 and device |
| CN107493505A (en) * | 2017-10-18 | 2017-12-19 | 北京优祥智恒科技有限公司 | A kind of apparatus and method for the video and audio transcoding for supporting dual-audio to export |
| CN108322777A (en) * | 2018-01-10 | 2018-07-24 | 成都驰通数码***有限公司 | A kind of system and processing method for supporting AC-3, AAC, DRA audio transparent transmission |
| CN110087086A (en) * | 2019-05-07 | 2019-08-02 | 北京流金岁月文化传播股份有限公司 | A kind of device and method for supporting 4K SDI to export |
| CN112351308A (en) * | 2020-10-30 | 2021-02-09 | 杭州当虹科技股份有限公司 | Method for realizing rapid transcoding based on local transcoding technology |
| WO2022218165A1 (en) * | 2021-04-13 | 2022-10-20 | Oppo广东移动通信有限公司 | Method and apparatus for receiving audio data packet, method and apparatus for sending audio data packet, and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107493505A (en) * | 2017-10-18 | 2017-12-19 | 北京优祥智恒科技有限公司 | A kind of apparatus and method for the video and audio transcoding for supporting dual-audio to export |
| CN107493505B (en) * | 2017-10-18 | 2023-12-26 | 北京流金岁月科技有限公司 | Device and method for video and audio transcoding supporting dual audio output |
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| CN110087086A (en) * | 2019-05-07 | 2019-08-02 | 北京流金岁月文化传播股份有限公司 | A kind of device and method for supporting 4K SDI to export |
| CN112351308A (en) * | 2020-10-30 | 2021-02-09 | 杭州当虹科技股份有限公司 | Method for realizing rapid transcoding based on local transcoding technology |
| WO2022218165A1 (en) * | 2021-04-13 | 2022-10-20 | Oppo广东移动通信有限公司 | Method and apparatus for receiving audio data packet, method and apparatus for sending audio data packet, and electronic device |
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