CN108322777A - A kind of system and processing method for supporting AC-3, AAC, DRA audio transparent transmission - Google Patents
A kind of system and processing method for supporting AC-3, AAC, DRA audio transparent transmission Download PDFInfo
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- CN108322777A CN108322777A CN201810023618.8A CN201810023618A CN108322777A CN 108322777 A CN108322777 A CN 108322777A CN 201810023618 A CN201810023618 A CN 201810023618A CN 108322777 A CN108322777 A CN 108322777A
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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
- H04N21/236—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
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- 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
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
Abstract
The invention discloses a kind of processing methods for supporting AC 3, AAC, DRA audio transparent transmission, including：Step 1, audio-video signal is separated into audio signal and vision signal；Step 2, the vision signal obtained in step 1 is subjected to write buffer, reading control obtains TS stream video signals, then extracts the PTS times of vision signal；Audio signal in step 1 is subjected to over-sampling and restores serial data and clock, then carries out serioparallel exchange and obtains parallel audio signals；Step 3, redundant data is deleted to the parallel audio signals in step 2, obtains original being effectively compressed coded audio signal.Present invention employs the audio datas of " audio transparent transmission and mixed processing module " transparent transmission, because, transparent transmission can only increase and delete the data such as transport protocol frame head, verification, it can't influence data content itself, therefore never have any loss to the audio data of compressed encoding, while decreasing expense caused by decoding coding techniques.
Description
Technical field
The present invention relates to field of audio processing, and in particular to a kind of system that supporting AC-3, AAC, DRA audio transparent transmission and place
Reason method.
Background technology
With the rapid development of Digital Radio television services and universal, more and more audio/video coders are needed, are used for
The digitlization of video and audio signal is converted and processing, these digitized processings include to the analog-to-digital conversion of signal, format conversion,
Compression etc.；The processing of video and audio is mainly realized by special chip or DSP/FPGA；It is universal with high-definition video signal,
2K/4K signals can be more and more, to the audio signal of high quality, it was also proposed that higher demand, before usually used MPEG-
1 audio coding formats cannot increasingly meet the requirement of current HD Audio, therefore the high quality such as AC-3, AAC, DRA occur
Audio coding standard, more can popularize and be widely used in subsequent use, be experienced with meeting the better presence of people
Demand；But because of the use of these coded formats of AC-3, AAC, DRA, need the patent fee of special mandate and costliness.In order to drop
The cost of low whole set equipment, and reduce influence of the audio re-encoding to audio signal integrality；Therefore encoder is only to vision signal
The coding for carrying out MPEG-2/H.264 takes the mode that audio transparent transmission is handled, both no longer to input to the audio signal of input
Audio signal content is handled, and only handle transport protocol, in receiving terminal, can preferably be restored with ensureing the integrality of signal
Audio signal itself；The main purpose of audio transparent transmission mainly solves the signal quality damage generated to the reprocessing of audio content
It loses, and the patent royalties such as AC-3, AAC, DRA need not be paid with (because of not re-encoded to audio, only doing at access
Reason, so not will produce patent royalties use)；The total cost of equipment to be effectively reduced, and improve the matter of audio signal
Amount.
Audio signal will not carry out other editing and processing as vision signal, prolong only for what synchronous video signal generated
Late, but audio signal has similarly carried out decoding and recompiling again processing, and synchronous require is transmitted to meet.But some audios are believed
Number (signal come from signal source), because be 5.1 sound channels or even 7.1 sound channels, but the audio solution device and coding of current main-stream
Device mainly only supports 2.0 channel, so after again carrying out the decoding and re-encoding of audio, audio signal can be reduced at 2.0
The audio output of sound channel, to have lost the quality of audio signal significantly.
In conclusion current and traditional implementation is to the audio signal from signal source, reprocessed, because
As long as to be reprocessed (decoding and recodification) to audio signal content, quantizing distortion, coding will be generated to audio signal
Distortion and reduction audio track quantity etc., destroy the integrality of audio signal；In addition, if to be carried out again to audio signal
Decoding and re-encoding process, will produce mandate and the patent fee of audio decoder and coding.
Invention content
The present invention is in view of the above-mentioned problems, be designed to provide a kind of system that supporting AC-3, AAC, DRA audio transparent transmission and place
Reason method.
The present invention is achieved through the following technical solutions：
A kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission, including：
Step 1, audio-video signal is separated into audio signal and vision signal；
Step 2, the vision signal obtained in step 1 is subjected to write buffer, reading control obtains TS stream video signals, then extracts
The PTS times of vision signal；Audio signal in step 1 is subjected to over-sampling and restores serial data and clock, then is gone here and there simultaneously
It is converted to parallel audio signals；
Step 3, redundant data is deleted to the parallel audio signals in step 2, obtains the original coded audio that is effectively compressed and believes
Number；
Step 4, it original in step 3 is effectively compressed coded audio signal carries out packing according to TS stream format and handle to obtain
TS streaming audio signals；
Step 5, by the label of the PTS times obtained in inserting step 2 in the TS streaming audio signals in step 4；
Step 6, the TS streaming audio signals in the TS stream videos signal and step 5 in step 2 are passed through into time-division multiplex technology
With obtaining audio and video TS flow datas and program data；
Step 7, the audio and video TS flow datas and program data that are obtained in step 6 are packaged into the data lattice of Ethernet transmission
Formula and the foundation, maintenance and service for completing data link.
Further, the vision signal in step 1 is by video editing treated vision signal.
Further, the clock that over-sampling restores is 27MHz system clocks.
Further, the redundant data in step 3 includes check byte, frame head, auxiliary data.
Further, it includes adding TS packet header 0x47, pid value, PTS fields, continuous counter to repair that processing is packaged in step 4
Change, audio data filling.
Further, the time division multiplexing in step 6 includes to TS stream videos signal, TS streaming audio signals, system controller
PSI/SI data, empty bag data multiplexing.
A kind of system for supporting AC-3, AAC, DRA audio transparent transmission, including HDMI/SDI digital interfaces processing module, compression
Video data cache module, audio interface data conversion module, audio raw data recovery module, ES/TS protocol groups packet and sound
Frequency data cache module, time insertion process module, video/audio data mixed processing module, IP data groups packet and transmission association
Processing module is discussed, HDMI/SDI digital interface processing modules are used to audio-video signal being separated into audio signal and vision signal；
Compressed video data cache module is used to carry out write buffer to vision signal, reading control obtains TS stream video signals；Audio interface
Data conversion module is used to carry out over-sampling to audio signal to restore serial data and clock, then carries out serioparallel exchange and obtain parallel
Audio signal；Audio raw data recovery module is used to delete the redundant data in parallel audio signals, obtains original effective pressure
Reduce the staff a yard audio signal；ES/TS protocol groups packet and audio data cache module to original for being effectively compressed coded audio signal
Packing is carried out according to TS stream format to handle to obtain TS streaming audio signals；Time insertion process module is used in TS streaming audio signals
It is inserted into the PTS times；Video/audio data mixed processing module is used to TS stream videos signal and TS streaming audio signals passing through the time-division
Multiplexing technology is with obtaining audio and video TS flow datas and program data；IP data groups packet and transport protocol processing module are for regarding sound
Frequency TS flow datas and program data are packaged into the data format of Ethernet transmission and complete the foundation of data link, maintain kimonos
Business.
Further, compressed video data cache module include the first data buffer, data buffer storage Read Controller,
PTS time extraction elements, the first data buffer are used to carry out write buffer, data buffer storage Read Controller to TS stream video signals
For carrying out reading control to TS stream videos signal, PTS time extraction elements are for extracting the PTS times；
Audio interface data conversion module includes the second buffer, over-sampling device, deserializer, and the second buffer is used
In carrying out write buffer to audio signal, over-sampling device is used to restore the serial data and clock of audio signal, deserializer
For serial audio signal to be converted to parallel audio signals；
Audio raw data recovery module includes third data buffer, redundant data deletion device, third data buffer storage
Device is used to carry out write buffer to parallel audio signals, and redundant data deletes device and is used to delete the redundant digit in parallel audio signals
According to obtaining original being effectively compressed coded audio signal；
ES/TS protocol groups packet and audio data cache module include the 4th data buffer, ES to TS protocol wrappers, the
Four data buffers are used to carry out write buffer to the original coded audio signal that is effectively compressed, and ES to TS protocol wrappers are used for original
Beginning, which is effectively compressed coded audio signal and carries out packing according to TS stream format, to be handled to obtain TS streaming audio signals；
Time insertion process module includes the 5th data buffer, PTS time insertion apparatus, and the 5th data buffer is used for
Write buffer is carried out to TS streaming audio signals, PTS time insertion apparatus is used to be inserted into the PTS times in TS streaming audio signals.
Further, video/audio data mixed processing module includes empty packet generator, the 6th data buffer, the 7th
Data buffer, multichannel data multiplex controller, empty packet generator for generating empty bag data, the 6th data buffer for pair
TS stream video signals carry out write buffer, and the 7th data buffer is used to carry out write buffer to TS streaming audio signals, and multichannel data is multiple
The PSI/SI for being used for the empty bag data to reception with controller, TS stream videos signal, TS streaming audio signals and system being generated
Data are time-multiplexed, and generate complete audio and video TS flow datas and program data.
Further, IP data groups packet and transport protocol processing module include the 8th data buffer, UDP/RTP packings
Device, IP outputs and protocol processor, the 8th data buffer are used to carry out write buffer to audio and video TS flow datas and program data,
UDP/RTP packing devices are used to complete the packet protocol data format content that IP transmission needs, and IP outputs and protocol processor are used for will
Audio and video TS flow datas and program data are packaged into the data format that can be transmitted in Ethernet, and in the management of system controller
Under, complete the foundation, maintenance and service of data link.
Compared with prior art, the present invention having the following advantages and advantages：
Present invention employs the audio datas of " audio transparent transmission and mixed processing module " transparent transmission, because transparent transmission can only increase
With delete transport protocol frame head, the data such as verification, data content itself can't be influenced, therefore never to having compressed volume
The audio data of code has any loss, while decreasing expense caused by decoding coding techniques；
Conversely, existing traditional treatment method, is first to carry out the decoding of audio, then carry out compressed audio coding, to meeting
Decoding and re-encoding distortion are introduced, decompression, decoding, resampling, re-quantization, recodification of audio data etc. are mainly manifested in,
Different degrees of distortion can be introduced, it cannot be guaranteed that the primary characteristic of audio data and frequency response, to audio data damage ratio 5~
30% differs, and can also bring expense caused by decoding coding techniques.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is audio-video signal piece-rate system structural schematic diagram in the prior art；
Fig. 2 is audio transparent transmission of the present invention and mixed processing modular structure schematic diagram；
Fig. 3 is compressed video data cache module structural schematic diagram of the present invention；
Fig. 4 is audio interface data conversion module structural schematic diagram of the present invention；
Fig. 5 is audio raw data recovery module structural schematic diagram of the present invention；
Fig. 6 is ES/TS protocol groups packet of the present invention and audio data cache module structural schematic diagram；
Fig. 7 is time insertion process modular structure schematic diagram of the invention；
Fig. 8 is video/audio data mixed processing modular structure schematic diagram of the present invention；
Fig. 9 is IP data groups packet of the present invention and transport protocol processing module structural schematic diagram.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
In following embodiment audio-video signal separation use the prior art, specific system as shown in Figure 1,
1, HDMI/SDI digital interfaces processing module：It is main to complete to divide the digital video and audio signal of input
From vision signal is sent to " video editing processing module " through BT1120 interfaces, not decoded audio raw data is passed through
SPDIF/AES interfaces are sent to " audio transparent transmission and mixed processing module ".
2, video editing processing module：It is main to complete be added station symbol to the video data of input, non-linear editing, add
Captioning, insert pictures, image synthesis or addition value-added service content etc., after the completion of processing, are then sent through " MPEG-2/H.264
Coding module ".
3, MPEG-2/H.264 coding modules：Main to complete to handle the compressed encoding of video data, coded format is
MPEG-2/H.264, the data after compressed encoding are then sent through " audio transparent transmission and mixed processing module ".
4, each module control unit of system：Whole control is carried out by the modules of the complete paired systems of the host CPU of system, and
It is realized by TCP/IP and all function controls of equipment is operated, can realize the friendly people with equipment by WEB on computers
Machine talks with interface.
5, power supply：It completes exchange and turns direct current, required power supply is provided for each module of equipment.
Embodiment
The present embodiment be based on FPGA be platform implementation, below in Fig. 1 audio transparent transmission and mixed processing module it is detailed
Description.
A kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission, including：
Step 1, audio-video signal is separated into audio signal and vision signal；
Step 2, the vision signal obtained in step 1 is subjected to write buffer, reading control obtains TS stream video signals, then extracts
The PTS times of vision signal；Audio signal in step 1 is subjected to over-sampling and restores serial data and clock, then is gone here and there simultaneously
It is converted to parallel audio signals；
Step 3, redundant data is deleted to the parallel audio signals in step 2, obtains the original coded audio that is effectively compressed and believes
Number；
Step 4, it original in step 3 is effectively compressed coded audio signal carries out packing according to TS stream format and handle to obtain
TS streaming audio signals；
Step 5, by the label of the PTS times obtained in inserting step 2 in the TS streaming audio signals in step 4；
Step 6, the TS streaming audio signals in the TS stream videos signal and step 5 in step 2 are passed through into time-division multiplex technology
With obtaining audio and video TS flow datas and program data；
Step 7, the audio and video TS flow datas and program data that are obtained in step 6 are packaged into the data lattice of Ethernet transmission
Formula and the foundation, maintenance and service for completing data link.
Further, the vision signal in step 1 is by video editing treated vision signal.
Further, the clock that over-sampling restores is 27MHz system clocks.
Further, the redundant data in step 3 includes check byte, frame head, auxiliary data.
Further, it includes adding TS packet header 0x47, pid value, PTS fields, continuous counter to repair that processing is packaged in step 4
Change, audio data filling.
Further, the time division multiplexing in step 6 includes to TS stream videos signal, TS streaming audio signals, system controller
PSI/SI data, empty bag data multiplexing.
As shown in Fig. 2, a kind of system for supporting AC-3, AAC, DRA audio transparent transmission, including the processing of HDMI/SDI digital interfaces
Module, compressed video data cache module, audio interface data conversion module, audio raw data recovery module, ES/TS agreements
Group packet and audio data cache module, time insertion process module, video/audio data mixed processing module, IP data group packets
And transport protocol processing module, HDMI/SDI digital interface processing modules are for being separated into audio signal by audio-video signal and regarding
Frequency signal；Compressed video data cache module is used to carry out write buffer to vision signal, reading control obtains TS stream video signals；Sound
Frequency interface data conversion module is used to carry out over-sampling to audio signal to restore serial data and clock, then carries out serioparallel exchange and obtain
To parallel audio signals；Audio raw data recovery module is used to delete the redundant data in parallel audio signals, obtains original
It is effectively compressed coded audio signal；ES/TS protocol groups packet and audio data cache module to original for being effectively compressed coding sound
Frequency signal carries out packing according to TS stream format and handles to obtain TS streaming audio signals；Time insertion process module is used in TS stream audios
The PTS times are inserted into signal；Video/audio data mixed processing module is for leading to TS stream videos signal and TS streaming audio signals
Time-division multiplex technology is crossed with obtaining audio and video TS flow datas and program data；IP data groups packet and transport protocol processing module are used for
Audio and video TS flow datas and program data are packaged into the data format of Ethernet transmission and completes the foundation of data link, maintain
And service.
As shown in figure 3, compressed video data cache module include the first data buffer, data buffer storage Read Controller,
PTS time extraction elements, the first data buffer are used to carry out write buffer, data buffer storage Read Controller to TS stream video signals
For carrying out reading control to TS stream videos signal, PTS time extraction elements are for extracting the PTS times；To the ES/TS videos of input
Data carry out write buffer, buffer memory capacity 1Mbytes first；Then under the management coordination of " data buffer storage Read Controller ",
Carry out reading control according to the state of rear class buffer, to ensure this buffer, both will not overflow, will not underflow；Again from caching
The extracting data that device is read goes out PTS times of video, and the supply audio frequency PTS times are inserted into use, when PTS to ensure video and audio
Between it is synchronous；
As shown in figure 4, audio interface data conversion module includes the second buffer, over-sampling device, deserializer, the
Two buffers are used to carry out write buffer to audio signal, and over-sampling device is used to restore the serial data and clock of audio signal,
Deserializer is used to serial audio signal being converted to parallel audio signals；Volume has been compressed to the SPDIF/AES audios of input
Code data carry out reception and the caching of data first；Then serial data and clock are restored by " over-sampling ", using serial
To the conversion of parallel data, the output of 8 bit parallel datas is converted to, so that post-module is handled；
As shown in figure 5, audio raw data recovery module includes third data buffer, redundant data deletion device, the
Three data buffers are used to carry out write buffer to parallel audio signals, and redundant data deletes device for deleting parallel audio signals
In redundant data, obtain original being effectively compressed coded audio signal；To 8 parallel-by-bit audio datas of input, first into line number
According to caching；Then the redundant data added by transport protocol is deleted, redundant data includes check byte, frame head and auxiliary data
Deng the original effective audio data of recovery, so that post-module is handled；
As shown in fig. 6, ES/TS protocol groups packet and audio data cache module include the 4th data buffer, ES to TS associations
Packing device is discussed, the 4th data buffer is used to carry out write buffer to the original coded audio signal that is effectively compressed, and ES to TS agreements are beaten
Packet device be used for it is original be effectively compressed coded audio signal and carry out packing according to TS stream format handle to obtain TS streaming audio signals；It is right
The original audio compress coding data of input carries out the caching of data first；Then packing processing is carried out by TS stream format, be packaged
Processing is mainly under the processing of system controller, by the format addition TS packet header 0x47 of TS streams, pid value, PTS fields, continuously
Operations, the outputs such as counter modification, audio data filling meet the TS flow datas of DVB standard format, so that post-module carries out
Processing；
As shown in fig. 7, time insertion process module includes the 5th data buffer, PTS time insertion apparatus, the 5th data
Buffer is used to carry out write buffer to TS streaming audio signals, and PTS time insertion apparatus in TS streaming audio signals for being inserted into PTS
Time.To the TS streaming audio datas of input, the caching of data is carried out first；Then PTS time tags, PTS are inserted into TS streams
Time is obtained by being extracted in video TS streams, to ensure video and audio time synchronization, so that post-module is handled.
As shown in figure 8, video/audio data mixed processing module includes empty packet generator, the 6th data buffer, the 7th
Data buffer, multichannel data multiplex controller, empty packet generator for generating empty bag data, the 6th data buffer for pair
TS stream video signals carry out write buffer, and the 7th data buffer is used to carry out write buffer to TS streaming audio signals, and multichannel data is multiple
The PSI/SI for being used for the empty bag data to reception with controller, TS stream videos signal, TS streaming audio signals and system being generated
Data are time-multiplexed, and generate complete audio and video TS flow datas and program data.Video to input and audio TS fluxion
According to, first carry out data caching；Under the management of " multichannel data multiplex controller ", completed by time-division multiplex technology to regarding
The multiplexing function of frequency TS streams, audio TS stream, PSI/SI tables, empty bag data；The PSI/SI data of program data are controlled by system
What device generated, it is finally multiplexed into complete audio and video TS flow datas and program data all the way, so that post-module is handled.
As shown in figure 9, IP data groups packet and transport protocol processing module include the 8th data buffer, UDP/RTP packings
Device, IP outputs and protocol processor, the 8th data buffer are used to carry out write buffer to audio and video TS flow datas and program data,
UDP/RTP packing devices are used to complete the packet protocol data format content that IP transmission needs, and IP outputs and protocol processor are used for will
Audio and video TS flow datas and program data are packaged into the data format that can be transmitted in Ethernet, and in the management of system controller
Under, complete the foundation, maintenance and service of data link.To the program TS flow datas of input, the caching of data is carried out first, then
Be sent into " UDP/RTP packing devices, with complete IP transmission need packet protocol data format content, using rear class " IP export and
Protocol processor " is packaged into the data format that can be transmitted in Ethernet, and under the management of system controller, completes data link
The operations such as foundation, maintenance and service；Keep receiving terminal real-time, continuously receives normal program data.
Present invention effectively avoids being reprocessed to audio signal content, only transport protocol is handled, to no
Existing audio data content can be damaged, audio track quantity will not be reduced；Awarding for audio decoder and coding will not be generated
Power and patent fee, reduce the cost of whole system, to effectively increase the competitiveness of product in market and properties of product.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission, which is characterized in that including：
Step 1, audio-video signal is separated into audio signal and vision signal；
Step 2, the vision signal obtained in step 1 is subjected to write buffer, reading control obtains TS stream video signals, then extracts video
The PTS times of signal；Audio signal in step 1 is subjected to over-sampling and restores serial data and clock, then carries out serioparallel exchange
Obtain parallel audio signals；
Step 3, redundant data is deleted to the parallel audio signals in step 2, obtains original being effectively compressed coded audio signal；
Step 4, it original in step 3 is effectively compressed coded audio signal carries out packing according to TS stream format and handle to obtain TS streams
Audio signal；
Step 5, by the label of the PTS times obtained in inserting step 2 in the TS streaming audio signals in step 4；
Step 6, the TS streaming audio signals in the TS stream videos signal and step 5 in step 2 are used by time-division multiplex technology
To audio and video TS flow datas and program data；
Step 7, the audio and video TS flow datas and program data that are obtained in step 6 are packaged into the data format of Ethernet transmission simultaneously
Complete foundation, maintenance and the service of data link.
2. a kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission according to claim 1, which is characterized in that institute
It is by video editing treated vision signal to state vision signal in step 1.
3. a kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission according to claim 1, which is characterized in that mistake
The clock that sampling restores is 27MHz system clocks.
4. a kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission according to claim 1, which is characterized in that institute
It includes check byte, frame head, auxiliary data to state the redundant data in step 3.
5. a kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission according to claim 1, which is characterized in that institute
It includes addition TS packet header 0x47 to state packing in step 4 and handle, pid value, PTS fields, continuous counter is changed, audio data is filled out
It fills.
6. a kind of processing method for supporting AC-3, AAC, DRA audio transparent transmission according to claim 1, which is characterized in that institute
It includes to TS stream videos signal, TS streaming audio signals, the PSI/SI data of system controller, sky to state the time division multiplexing in step 6
The multiplexing of bag data.
7. a kind of system for supporting AC-3, AAC, DRA audio transparent transmission, which is characterized in that including the processing of HDMI/SDI digital interfaces
Module, compressed video data cache module, audio interface data conversion module, audio raw data recovery module, ES/TS agreements
Group packet and audio data cache module, time insertion process module, video/audio data mixed processing module, IP data group packets
And transport protocol processing module, the HDMI/SDI digital interfaces processing module are used to audio-video signal being separated into audio signal
And vision signal；The compressed video data cache module is used to control vision signal progress write buffer, compressed encoding, reading
To TS stream video signals；The audio interface data conversion module be used for audio signal carry out over-sampling restore serial data and
Clock, then carry out serioparallel exchange and obtain parallel audio signals；The audio raw data recovery module is for deleting parallel audio
Redundant data in signal obtains original being effectively compressed coded audio signal；The ES/TS protocol groups packet and audio data caching
Module be used for it is original be effectively compressed coded audio signal and carry out packing according to TS stream format handle to obtain TS streaming audio signals；Institute
Time insertion process module is stated for being inserted into the PTS times in TS streaming audio signals；The video/audio data mixed processing mould
Block is used for TS stream videos signal and TS streaming audio signals through time-division multiplex technology with obtaining audio and video TS flow datas and program
Data；The IP data groups packet and transport protocol processing module are used to audio and video TS flow datas and program data being packaged into ether
It nets the data format of transmission and completes the foundation, maintenance and service of data link.
8. a kind of system for supporting AC-3, AAC, DRA audio transparent transmission according to claim 7, which is characterized in that
The compressed video data cache module is extracted including the first data buffer, data buffer storage Read Controller, PTS times
Device, first data buffer are used to carry out write buffer to TS stream video signals, and the data buffer storage Read Controller is used
In carrying out reading control to TS stream videos signal, the PTS times extraction element is for extracting the PTS times；
The audio interface data conversion module includes the second buffer, over-sampling device, deserializer, second caching
Device is used to carry out write buffer to audio signal, and the over-sampling device is used to restore the serial data and clock of audio signal, institute
Deserializer is stated for serial audio signal to be converted to parallel audio signals；
The audio raw data recovery module includes third data buffer, redundant data deletion device, the third data
Buffer is used to carry out write buffer to parallel audio signals, and the redundant data deletes device for deleting in parallel audio signals
Redundant data, obtain original being effectively compressed coded audio signal；
The ES/TS protocol groups packet and audio data cache module include the 4th data buffer, ES to TS protocol wrappers, institute
The 4th data buffer is stated for carrying out write buffer, ES to the TS protocol wrappers to the original coded audio signal that is effectively compressed
For to it is original be effectively compressed coded audio signal and carry out packing according to TS stream format handle to obtain TS streaming audio signals；
The time insertion process module includes the 5th data buffer, PTS time insertion apparatus, the 5th data buffer
For carrying out write buffer to TS streaming audio signals, when the PTS times insertion apparatus is used to be inserted into PTS in TS streaming audio signals
Between.
9. a kind of system for supporting AC-3, AAC, DRA audio transparent transmission according to claim 7, which is characterized in that described to regard
Frequently/audio data mixed processing module includes empty packet generator, the 6th data buffer, the 7th data buffer, multichannel data
Multiplex controller, the sky packet generator are used to believe TS stream videos for generating empty bag data, the 6th data buffer
Number write buffer is carried out, the 7th data buffer is used to carry out write buffer, multichannel data multiplexing to TS streaming audio signals
The PSI/SI numbers that controller is used for the empty bag data to reception, is generated to TS stream videos signal, TS streaming audio signals and system
According to being time-multiplexed, complete audio and video TS flow datas and program data are generated.
10. a kind of system for supporting AC-3, AAC, DRA audio transparent transmission according to claim 7, which is characterized in that described
IP data groups packet and transport protocol processing module include the 8th data buffer, UDP/RTP packing devices, IP outputs and protocol processes
Device, the 8th data buffer are used to carry out write buffer to audio and video TS flow datas and program data, and the UDP/RTP is packaged
Device is used to complete the packet protocol data format content that IP transmission needs, and the IP outputs and protocol processor are used for audio and video TS
Flow data and program data are packaged into the data format that can be transmitted in Ethernet, and under the management of system controller, complete number
According to the foundation, maintenance and service of link.
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