CN202210851U - Control device for standard-definition/ high-definition audio video coder and decoder - Google Patents
Control device for standard-definition/ high-definition audio video coder and decoder Download PDFInfo
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Abstract
The utility model discloses a control device for a standard-definition/high-definition audio video coder and decoder, which is mainly consists of an audio video streaming unit, a streaming media application framework, a Davinci multi-media application interface, a codec engine, a Linux kernal, a local hard disk storage unit, framework components, a DSP/BIOS (digital signal processing/basic input/output system) kernal, a coding and decoding compression algorithm packet and a DSP link, wherein the audio video streaming unit, the streaming media application framework, the Davinci multi-media application interface, the codec engine, the Linux kernal and the local hard disk storage unit run at an ARM (advanced RISC machines) terminal, and the framework components, the DSP/BIOS kernal, the coding and decoding compression algorithm packet and the DSP link run at a DSP terminal. The control device adopts a hardware dual-core DPS+ARM as a core processor, so that the coding and decoding performance reaches the code acquisition ability over 1080P60HZ, or coding and decoding of 720P60HZ (namely, 1280*720P) are simultaneously realized. The control device also adopts the most advanced H.264 video algorithm, has the advantages of low occupied network bandwidth, short time delay and the like, and the difficulty in wiring construction is further greatly reduced.
Description
Technical field
The utility model relates to the control device that is used for SD and high resolution audio and video encoding and decoding, especially relates to being used for up to the remote living broadcast coding of the high resolution audio and video signal of 1080P (1920x1080), the control device of real-time decoding.
Background technology
At present, the mode of known remote watching audio-video signal employing has independent optical fiber to cooperate the DSP of soft compress mode of audio-video collection card and employing pure hardware circuit to realize the codec of one road audio-video collection as audio frequency and video optical transceiver, the employing industrial computer of transmission medium.The implementation of optical transceiver is that audio frequency and video need not be compressed, and directly is transferred to the decoding end end after the digitlization, good image quality but because of it needs independent wiring construction, and can't utilize existing LAN system to transmit; Industrial computer cooperates the soft compress mode of audio-video collection card, and technological starting point is lower but cost is higher, links to each other with main frame because of capture card utilizes pci bus, influenced by the pci bus bandwidth and can't gather the multi-path high-definition vision signal by separate unit; The DSP of pure hardware circuit realizes one road audio-video collection coding or decoding, because of receiving the problem of DSP performance performance, can't carry out coding and the decoding of high definition 720P (1280X720P)/1080P (1920x1080P) simultaneously, makes long liter the on the user cost.
In order to overcome the deficiency of above at present three kinds of different schemes, encoding and decoding when the utility model adopts control device to realize coding or 1 road 720P60HZ (1280X720P) of 1 road 1080P60HZ (1920x1080P).
Description of drawings
Below in conjunction with accompanying drawing, tabulation and specific embodiment are done further to specify to the utility model.
Fig. 1 is each unit of the control device constituent relation figure that is used for SD and high resolution audio and video encoding and decoding
The utility model content
The utility model provides a kind of control device that is used for SD and high resolution audio and video encoding and decoding, it is characterized in that, comprising:
First processor is used to handle SD and high resolution audio and video upper layer application, and is connected with second processor through communication interface;
Second processor is used to move SD and high resolution audio and video encoding and decoding compression algorithm, and is connected with first processor through communication interface;
Communication interface is used to connect first and second processors, realizes the exchange of data and control command.
In addition, a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to above-mentioned is characterized in that said first processor comprises:
Audio frequency and video fluidisation unit is received resolution unit and is formed by RTSP coding fluidisation unit, RTSP, and RTSP coding fluidisation unit is used for that the audio-video signal through compression is become audio/video flow and sends to long-range through network; RTSP receives resolution unit and is used for the audio/video flow that remote transmission is come is received and resolves, and the data after parsing is accomplished send multimedia framework to and carry out the audio frequency and video processing;
Streaming Media application framework unit comprises a series of media processing units, and the clean culture that realizes conforming to the principle of simplicity is put into complicated audio frequency and video and handles;
Leonardo da Vinci's multimedia application interface DMAI; Be connected with Streaming Media application framework unit; To encoding, decode and carrying out the conversion and the encapsulation of data format, make that different external equipment interface for first controller all is unified from the driving interface of external equipment;
The encoding and decoding engine unit is connected with communication interface, is used to call and move the algorithm that meets the execution of second processor.
Kernel unit is used for first processor is carried out storage administration, management of process, and the management of file system, the Devices and Drivers management, network communication, initialization and first processor are to the management of equipment calls;
The local hard drive control unit is used for the local hard drive that is connected with first processor is controlled.
In addition, a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to above-mentioned is characterized in that said second processor comprises:
Kernel unit is used for the implementation and operation of the second processor internal unit is managed;
The frame assembly unit is used to support the algorithm of second processor operation, the internal memory and the DMA resource of distributing second processor;
Encoding and decoding compression algorithm unit comprises the audio/video encoding/decoding compression algorithm storehouse that second processor can be carried out, and calls so that frame assembly unit and kernel unit are carried out;
Interface unit is used for being connected through the coding engine unit of communication interface and first processor.
Wherein, first processor can be arm processor, and second processor can be dsp processor.
The algorithm of the frame assembly unit operation of second processor is a DSP algorithm standard; First handles in its encoding and decoding engine unit and comprises the audio frequency and video api interface, is connected with dsp processor through communication interface.
Wherein, DMAI calls the code decode algorithm of dsp processor in the first processor through the audio frequency and video api interface in the encoding and decoding engine unit; Duplicate through frame the audio, video data of coding bottom collection is passed to the upper strata; Through display interface the audio, video data of decoding is passed to the decoding chip of bottom, make this locality can demonstrate long-range video image.
Wherein, first processor has the local hard drive control unit, and it comprises:
Query unit, according to the storage time started, label, passage inquiry stored information; The stored information that inquires comprises the time started, concluding time, file size, store path; Timestamp, totalframes, document time length; And the integrality of file, and can control the bar number that inquiry storage multimedia application is served, and guarantee that inquiry velocity is because number of labels reduces very fast;
The power down process unit, under the situation that SD and high resolution audio and video codec main frame break down (, guarantee that restarting the data of being inquired about the back at it does not make mistakes;
The file division unit is used for audio/video flow is carried out file division;
Status unit, beginning that can control store and stopping, and the time started and the concluding time of record storage, and stamp corresponding time tag, make things convenient for query unit and multimedia server streaming media server to inquire about;
Download unit can use http to download the recording multi-media data file, the function that the multichannel that provides support is downloaded simultaneously, and when requiring downloading to live, storage is influence not, can support breakpoint transmission; Speed of download is set.
Wherein, H.264 the video code and decode algorithm of the control device of this SD and high resolution audio and video encoding and decoding comprises that H.263, the audio encoding and decoding algorithm comprises Advanced Audio Coding AAC, MP3.
This control device is mainly used in recorded broadcast of session; Numeral court's trial, command scheduling; The numeral bulletin, remote teaching, tele-medicine, video conference, monitoring and radio and television are in live, the program request of long-range acquisition high definition video, HD Audio, the application scenario of recorded broadcast of needing such as interior.
Embodiment
Fig. 1 is each unit of the control device constituent relation figure that is used for SD and high resolution audio and video encoding and decoding.As can be seen from the figure, software mainly is made up of the frame assembly, DSP/BIOS kernel, encoding and decoding compression algorithm bag, DSP LINK four big units that operate on the DSP; And audio frequency and video fluidisation unit, Streaming Media application framework unit, Leonardo da Vinci's multimedia application interface, encoding and decoding engine, linux kernel, six unit of local hard drive memory cell of operating in the ARM end are formed.
The explanation of each unit of control device of SD and high resolution audio and video encoding and decoding is following:
Audio frequency and video fluidisation unit 1: this element is mainly received resolution unit and is formed by RTSP coding fluidisation unit, RTSP.RTSP coding fluidisation unit mainly is responsible for becoming audio/video flow through the audio-video signal of compression and is sent to long-range through network; RTSP receives the mainly responsible audio/video flow that remote transmission is come of resolution unit and receives and resolve, and the audio, video data after parsing is accomplished passes to multimedia framework and carries out the audio frequency and video processing.
Streaming Media application framework 2: this equipment adopts a multimedia framework storehouse Gstreamer who increases income to stop application framework as many matchmakers; Its work is to utilize it can make up a series of media processing units, comprises audio frequency (audio mixing) and the processing of video (non-linear editing) from simple playing function to complicacy.Application program can be transparent utilization decoding and filtering technique.The developer can general interface ease in use writes a simple plug-in unit and adds new decoder or filter.
Leonardo da Vinci's multimedia application interface (DMAI) 3:DMAI (Davinci Multimedia Application Interface) Leonardo da Vinci's multimedia application interface mainly is to coding; Decoding; The device drives interface carries out abstract; Make that they are unified for the application program interface on different equipment, strengthened portability of application programs.To coding, the input and output buffer memory buffer during decoding encapsulates DMAI simultaneously.DMAI is through VISA (Video, Image Speech, Audio) the API Calls DSP side code decode algorithm of coding engine (codec engine).Duplicate (FrameCopy) will encode audio, video data of bottom collection through frame and pass to the upper strata, the audio, video data of decoding is passed to the decoding chip of bottom, make this locality can demonstrate long-range video image through display interface.
Encoding and decoding engine (Codec Engine) 4: encoding and decoding engine Codec Engine is the bridge that connects ARM and DSP or coprocessor, is the software unit between application layer (application program of ARM side) and signal processing layer (algorithm of DSP side).Call and move the algorithm that meets xDAIS through the API that calls Codec Engine.In Leonardo da Vinci Davinci software, the calling of audio/video encoding/decoding algorithm (being the xDM algorithm) that meets xDAIS (DSP algorithm standard) is the VISA API completion through Codec Engine.Codec Engine is software architecture and the interface that the execution of algorithm provides a standard through this cover API.
Be called as " kernel " in the term of linux kernel (Linux Kernal) 5:Linux, also can be called " core ".The formant of linux kernel (or assembly) divides following components: storage administration, CPU and management of process, file system, equipment control and driving, network service, and the initialization of system (guiding), system call etc.Operating system is rudimentary support programs that are used for coming into contacts with hardware and a limited services set is provided for user program.
Local hard drive memory cell 6: this element mainly is made up of totally five unit download unit, query unit, power down process unit, status unit, file division unit, and each Elementary Function is:
SD/high resolution audio and video codec main frame has query unit, can inquire about stored information.SD/high resolution audio and video codec host query unit is according to the storage time started, label, and passage inquiry stored information, the stored information that inquires comprises: the time started; Concluding time, file size, store path; Timestamp pts, totalframes, document time length; And the integrality of file, and can control the bar number that inquiry storage multimedia application is served, and guarantee that inquiry velocity is because number of labels reduces very fast.
SD/high resolution audio and video codec main frame also has the power down process unit; Under the situation that SD/high resolution audio and video codec main frame breaks down when the outage of SD/high resolution audio and video codec main frame (for example), the data that guarantee after it restarts to be inquired about are not made mistakes.The a plurality of end functions of a plurality of beginnings are supported in the power down process unit; If repeatedly begin, only the time of the record time started label first time, the time tag that begins is later on ignored, up to end.If repeatedly finish, only the time of the record concluding time label first time, the time tag that finishes is later on ignored, up to beginning; Thereby guarantee that streaming media server inquiry SD/high resolution audio and video codec main frame is the integrality of time tag.
SD/high resolution audio and video codec main frame also has the file division unit, is used for audio/video flow is carried out file division; SD/high resolution audio and video codec main frame also has status unit, beginning that can control store and stopping; And the time started and the concluding time of record storage, and stamp corresponding time tag, make things convenient for the inquiry of query unit and multimedia server streaming media server.SD/high resolution audio and video codec master machine control unit can be controlled the hard disk covering in addition; And can according to the scheduled time with or cover threshold values and file is circulated cover or remove; Control unit can also be realized the stored information deletion, promptly can delete specified file and catalogue; And according to the storage time started, label, passage deletion stored information.Can obtain the carry state of hard disk, gross space, usage space, remaining space.
SD/high resolution audio and video codec main frame also has download unit; Can use http to download the recording multi-media data file, 4 road functions downloaded simultaneously that provide support, and when requiring downloading to live; Storage is influence not, can support breakpoint transmission; Speed of download is set.
Frame assembly (Framework Components) 7: mainly be some unit that are used for supporting DSP end algorithm development, can manage the algorithm unit that meets the xDAIS standard, storage allocation and DMA resource.These unit are used by the encoding and decoding engine, if but be necessary also can use them in DSP end program.Be responsible for internal memory (memory and the direct memory access DMA resource management of DSP side.
DSP/BIOS video 8: be the DSP real time operating system that TI provides.DSP/BIOS is a upgradeable real-time DSP kernel, does not comprise corresponding pattern analysis instrument.
DSP links (DSP Link) 9: be the bottom software of communicating by letter between realization ARM and the DSP, Codec Engine is based upon on this bottom software exactly.
Encoding and decoding compression algorithm bag 10: the set in all audio/video codings, decoding algorithm storehouse.H.264 the video code and decode algorithm comprise, H.263; The audio encoding and decoding algorithm comprises Advanced Audio Coding AAC (Advanced Audio Coding), MP3 (MPEG Audio Layer 3).
Claims (8)
1. a control device that is used for SD and high resolution audio and video encoding and decoding is characterized in that, comprising:
First processor is used to handle SD and high resolution audio and video upper layer application, and is connected with second processor through communication interface;
Second processor is used to move SD and high resolution audio and video encoding and decoding compression algorithm, and is connected with first processor through communication interface;
Communication interface is used to connect first and second processors, realizes the exchange of data and control command.
2. a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to claim 1 is characterized in that said first processor comprises:
Audio frequency and video fluidisation unit is received resolution unit and is formed by RTSP coding fluidisation unit, RTSP, and RTSP coding fluidisation unit is used for that the audio-video signal through compression is become audio/video flow and sends to long-range through network; RTSP receives resolution unit and is used for the audio/video flow that remote transmission is come is received and resolves, and the data after parsing is accomplished send multimedia framework to and carry out the audio frequency and video processing;
Streaming Media application framework unit comprises a series of media processing units, and the clean culture that realizes conforming to the principle of simplicity is put into complicated audio frequency and video and handles;
Leonardo da Vinci's multimedia application interface DMAI; Be connected with Streaming Media application framework unit; To encoding, decode and carrying out the conversion and the encapsulation of data format, make that different external equipment interface for first controller all is unified from the driving interface of external equipment;
The encoding and decoding engine unit is connected with communication interface, is used to call and move the algorithm that meets the execution of second processor.
Kernel unit is used for first processor is carried out storage administration, management of process, and the management of file system, the Devices and Drivers management, network communication, initialization and first processor are to the management of equipment calls;
The local hard drive control unit is used for the local hard drive that is connected with first processor is controlled.
3. a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to claim 2 is characterized in that said second processor comprises:
Kernel unit is used for the implementation and operation of the second processor internal unit is managed;
The frame assembly unit is used to support the algorithm of second processor operation, the internal memory and the DMA resource of distributing second processor;
Encoding and decoding compression algorithm unit comprises the audio/video encoding/decoding compression algorithm storehouse that second processor can be carried out, and calls so that frame assembly unit and kernel unit are carried out;
Interface unit is used for being connected through the coding engine unit of communication interface and first processor.
4. according to any described a kind of control device that is used for SD and high resolution audio and video encoding and decoding of claim 1-3, it is characterized in that said first processor is an arm processor, it is dsp processor for second processing.
5. a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to claim 4 is characterized in that, the algorithm of the frame assembly unit operation of said second processor is a DSP algorithm standard; Said first handles in its encoding and decoding engine unit and comprises the audio frequency and video api interface, is connected with dsp processor through communication interface.
6. a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to claim 5; It is characterized in that; DMAI calls the code decode algorithm of dsp processor in the said first processor through the audio frequency and video api interface in the encoding and decoding engine unit; Duplicate through frame the audio, video data of coding bottom collection is passed to the upper strata, the audio, video data of decoding is passed to the decoding chip of bottom, make this locality can demonstrate long-range video image through display interface.
7. a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to claim 6 is characterized in that the local hard drive control unit in the said first processor comprises:
Query unit, according to the storage time started, label, passage inquiry stored information; The stored information that inquires comprises the time started, concluding time, file size, store path; Timestamp, totalframes, document time length; And the integrality of file, and can control the bar number that inquiry storage multimedia application is served, and guarantee that inquiry velocity is because number of labels reduces very fast;
The power down process unit under the situation that SD and high resolution audio and video codec main frame break down, guarantees that restarting the data of being inquired about the back at it does not make mistakes;
The file division unit is used for audio/video flow is carried out file division;
Status unit, beginning that can control store and stopping, and the time started and the concluding time of record storage, and stamp corresponding time tag, make things convenient for query unit and multimedia server streaming media server to inquire about;
Download unit can use http to download the recording multi-media data file, the function that the multichannel that provides support is downloaded simultaneously, and when requiring downloading to live, storage is influence not, can support breakpoint transmission; Speed of download is set.
8. a kind of control device that is used for SD and high resolution audio and video encoding and decoding according to claim 7 is characterized in that H.264 said video code and decode algorithm comprises that H.263, the audio encoding and decoding algorithm comprises Advanced Audio Coding AAC, MP3.
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| CN 201120037088 CN202210851U (en) | 2011-02-12 | 2011-02-12 | Control device for standard-definition/ high-definition audio video coder and decoder |
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| CN 201120037088 CN202210851U (en) | 2011-02-12 | 2011-02-12 | Control device for standard-definition/ high-definition audio video coder and decoder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023202A (en) * | 2014-03-18 | 2014-09-03 | 山东大学 | Framework of high-definition video processing unit |
| CN104050021A (en) * | 2013-03-15 | 2014-09-17 | 联想(北京)有限公司 | Multimedia file processing method and electronic equipment |
| CN105917658A (en) * | 2014-01-23 | 2016-08-31 | 索尼公司 | Decoding device, decoding method, encoding device, and encoding method |
| CN109729361A (en) * | 2019-01-28 | 2019-05-07 | 北京晶品特装科技有限责任公司 | A kind of terminal hardware implementation method with audiovisual compression |
-
2011
- 2011-02-12 CN CN 201120037088 patent/CN202210851U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050021A (en) * | 2013-03-15 | 2014-09-17 | 联想(北京)有限公司 | Multimedia file processing method and electronic equipment |
| CN104050021B (en) * | 2013-03-15 | 2018-12-14 | 联想(北京)有限公司 | Multimedia file processing method and electronic equipment |
| CN105917658A (en) * | 2014-01-23 | 2016-08-31 | 索尼公司 | Decoding device, decoding method, encoding device, and encoding method |
| CN105917658B (en) * | 2014-01-23 | 2020-04-07 | 索尼公司 | Decoding apparatus, decoding method, encoding apparatus, and encoding method |
| CN104023202A (en) * | 2014-03-18 | 2014-09-03 | 山东大学 | Framework of high-definition video processing unit |
| CN104023202B (en) * | 2014-03-18 | 2018-04-27 | 山东大学 | HD video processing system |
| CN109729361A (en) * | 2019-01-28 | 2019-05-07 | 北京晶品特装科技有限责任公司 | A kind of terminal hardware implementation method with audiovisual compression |
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Address after: 100094, No. 6, building, No. 3, Feng Xiu Middle Road, Beijing, Haidian District Patentee after: Beijing Huaxia Diantong Technology Co., Ltd. Address before: 100085 Haidian District, 3rd floor, 3rd floor, Wah Wah building, block, Beijing, A301, A Patentee before: Beijing Powercom Technologies Co., Ltd. |
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Address after: 100094, No. 6, building, No. 3, Feng Xiu Middle Road, Beijing, Haidian District Patentee after: BEIJING HUAXIA DENTSU TECHNOLOGY Co.,Ltd. Address before: 100094, No. 6, building, No. 3, Feng Xiu Middle Road, Beijing, Haidian District Patentee before: BEIJING CHINASYS TECHNOLOGIES Co.,Ltd. |
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Granted publication date: 20120502 |