CN100579221C - Multichannel video frequency compression system based on single-chip double-nuclear DSP constitution - Google Patents
Multichannel video frequency compression system based on single-chip double-nuclear DSP constitution Download PDFInfo
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- CN100579221C CN100579221C CN200610155128A CN200610155128A CN100579221C CN 100579221 C CN100579221 C CN 100579221C CN 200610155128 A CN200610155128 A CN 200610155128A CN 200610155128 A CN200610155128 A CN 200610155128A CN 100579221 C CN100579221 C CN 100579221C
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Abstract
A multi-path video compression system based on single chip two nuclei DSP structure is prepared as parallel-connecting video collection component and audio collection component to two nuclei DSP processor, connecting SDRAM component and two-port RAM component to system bus of said processor, connecting embedded process wit two nuclei processor through two-port RAM component.
Description
Technical field
The present invention relates to the Digital Video Processing technical field, be meant a kind of multichannel video frequency compression system specifically based on single-chip double-nuclear DSP constitution.
Background technology
Digital video monitor system is applied to safety-security area more and more widely.Video compression system is the important component part of digital video monitor system, and is low-cost, multiplex coding, the video compression system that can carry out function upgrading flexibly are that the user is desired simultaneously.In video compression system, the key process unit that carries out compressed encoding generally adopts ASIC (application-specific integrated circuit (ASIC)) or dsp processor.Adopting the major defect of ASIC is exactly the function upgrading inconvenience, and does not allow to carry out simultaneously the encoding compression of multipath video source.Video compression system based on dsp processor has overcome above-mentioned shortcoming, has upgrade function, permission flexibly to multipath video source while encoding compression.
Summary of the invention
The invention provides a kind of multichannel video frequency compression system based on single-chip double-nuclear DSP constitution.Function with the multichannel audio-video frequency signal of encoding simultaneously has advantages such as low cost, high reliability and function upgrading be flexible.
A kind of multichannel video frequency compression system based on single-chip double-nuclear DSP constitution, comprise video acquisition device, audio collection device and double-nuclear DSP processor, video acquisition device and audio collection device parallel are linked on the double-nuclear DSP processor, be connected to SDRAM device and dual port RAM device on the system bus of double-nuclear DSP processor, the double-nuclear DSP processor is connected to flush bonding processor through the dual port RAM device.
Be provided with in the described double-nuclear DSP processor and be used for accepting the also video acquisition driver module of managing video data from the video acquisition device;
Be used for accepting the also audio collection driver module of managing audio data from the audio collection device;
Be used for character laminating module that the character information that flush bonding processor sends over is superposeed;
Be used for encoding code stream is carried out the watermark encrypting module of encryption;
Support is used for multi-channel video is carried out encoding compression processing to the multi-channel video encoder that multipath video source compresses simultaneously;
Be used to the compressibility function upgrading administration module of upgrading flexibly;
Be used for the dual port RAM communication module that compressibility and flush bonding processor carry out information communication;
Video acquisition driver module and audio collection driver module are accepted video and voice data from video acquisition device and audio collection device respectively, and these data are managed; Character laminating module receiver, video is gathered the video pictures to be encoded that driver module provides, and carries out the character overlap-add procedure by character information, and the video pictures that stack is finished sends to coder module and encodes again; The multi-channel video encoder receives relevant coded command through the dual port RAM communication driving module from flush bonding processor, be responsible for multi-channel video is carried out encoding compression processing, it can support the Real Time Compression to the accurate definition video source of a road sign, also can support Real Time Compression, and the coded data that coding is come out sends to flush bonding processor to two to four tunnel intermediate resolution video source; The watermark encrypting module extracts necessary code coefficient in the process of video coding simultaneously, and by pre-determined cryptographic protocol code coefficient is carried out encryption, at last data encrypted is embedded in the encoding code stream.
Also be connected on the described double-nuclear DSP processor and somely be used to send or the IO mouth line of incoming level signal.
System of the present invention is based on the realization of single-chip double-nuclear DSP processor, system's support is carried out compressed encoding to four road Voice ﹠ Video sources simultaneously, system can determine the pattern of current needs coding according to the coding mode order that flush bonding processor sends, it can be the accurate definition video coding of a road sign, or four tunnel intermediate resolution video codings.And have on video pictures to be encoded overlaying character, in encoding code stream, embed the function of encrypted watermark.
Description of drawings
Fig. 1 is the structural representation block diagram of system of the present invention;
Fig. 2 is the function schematic block diagram of system of the present invention;
The operation schematic flow diagram that Fig. 3 encodes to four tunnel video source simultaneously for system of the present invention.
Embodiment
As shown in Figure 1, a kind of multichannel video frequency compression system based on single-chip double-nuclear DSP constitution, comprise video collector 110, audio collection device 120 and double-nuclear DSP processor 130, video collector 110 and audio collection device 120 parallel being linked on the double-nuclear DSP processor 130, be connected to SDRAM device 140 and dual port RAM device 150 on the system bus of double-nuclear DSP processor 130, also be connected to the IO mouth line 160 of some on the double-nuclear DSP processor 130, double-nuclear DSP processor 130 is connected to flush bonding processor through dual port RAM device 150.
As shown in Figure 2, be provided with in the double-nuclear DSP processor 130
Be used for accepting the also video acquisition driver module 210 of managing video data from video collector 110;
Be used for accepting the also audio collection driver module 220 of managing audio data from audio collection device 120;
Be used for character laminating module 230 that the character information that flush bonding processor sends over is superposeed;
Be used for encoding code stream is carried out the watermark encrypting module 240 of encryption,, can prevent that the encoding code stream data are maliciously tampered by watermark encrypting;
Support is used for multi-channel video is carried out encoding compression processing to the multi-channel video encoder 250 that multipath video source compresses simultaneously;
Be used to the compressibility function upgrading administration module 260 of upgrading flexibly, because compressibility based on dsp processor, the functional module that they had is all realized by software, therefore the interpolation of the modification of existing function and what's new is all only needed upgrade the related software code and get final product, this compressibility based on software, making provides great convenience for function renewal;
Be used for the dual port RAM communication module 270 that compressibility and flush bonding processor carry out information communication;
Video acquisition driver module 210 and audio collection driver module 220 are accepted video and voice data from video collector 110 and audio collection device 120 respectively, and these data are managed; Character laminating module 230 receiver, videos are gathered the video pictures to be encoded that driver module 210 provides, and carry out the character overlap-add procedure by character information, and the video pictures that stack is finished sends to multi-channel video encoder 250 and encodes again; Multi-channel video encoder 250 receives relevant coded command through dual port RAM communication driving module 270 from flush bonding processor, be responsible for multi-channel video is carried out encoding compression processing, it can support the Real Time Compression to the accurate definition video source of a road sign, also can support Real Time Compression, and the coded data that coding is come out sends to flush bonding processor to two to four tunnel intermediate resolution video source; Watermark encrypting module 240 extracts necessary code coefficient in the process of video coding simultaneously, and by pre-determined cryptographic protocol code coefficient is carried out encryption, at last data encrypted is embedded in the encoding code stream.
Figure 3 shows that and utilize encode the simultaneously operation schematic flow diagram of four tunnel video source of multichannel video frequency compression system of the present invention, as shown in the figure, video camera 310 is responsible for gathering video pictures, video collector 110 receives the video pictures of the accurate definition of four road signs, through video pictures 330 to output one width of cloth single-definition after the processing of incoming video signal, video pictures 330 is made up of the picture that dwindles of four tunnel video source, and their level and vertical size all are 1/2nd of original video picture.Multi-channel video encoder 250 is encoded respectively by four parts to video pictures 330, can compress four tunnel encoding code streams independently, and this four road coding is sent to the decoding end decoding, and the user just can watch the picture of four tunnel video source simultaneously.From double-nuclear DSP constitution, processor core A is responsible for top two parts sprite of encoded video picture 330, and processor core B is responsible for following two parts sprite of encoded video picture 330.From the operation chart of Fig. 3 as can be seen, if input video source less than four the tunnel, when only having the two-path video source, then encoder can be configured to only that two parts sprite that real video source is arranged be encoded.So encoder of the present invention can carry out the while encoding compression to one to four tunnel video source.
Claims (2)
1. multichannel video frequency compression system based on single-chip double-nuclear DSP constitution, comprise video acquisition device (110), audio collection device (120) and double-nuclear DSP processor (130), it is characterized in that video acquisition device (110) and audio collection device (120) are parallel is linked on the double-nuclear DSP processor (130), be connected to SDRAM device (140) and dual port RAM device (1 50) on the system bus of double-nuclear DSP processor (130), double-nuclear DSP processor (130) is connected to flush bonding processor through dual port RAM device (150);
Be provided with in the described double-nuclear DSP processor (130)
Be used for accepting the also video acquisition driver module (210) of managing video data from video acquisition device (110);
Be used for accepting the also audio collection driver module (220) of managing audio data from audio collection device (120);
Be used for character laminating module (230) that the character information that flush bonding processor sends over is superposeed;
Be used for encoding code stream is carried out the watermark encrypting module (240) of encryption;
Support is used for multi-channel video is carried out encoding compression processing to the multi-channel video encoder (250) that multipath video source compresses simultaneously;
Be used to the compressibility function upgrading administration module (260) of upgrading flexibly;
Be used for the dual port RAM communication module (270) that compressibility and flush bonding processor carry out information communication;
Video acquisition driver module (210) and audio collection driver module (220) are accepted video and voice data from video acquisition device (110) and audio collection device (120) respectively, and these data are managed; Character laminating module (230) receiver, video is gathered the video pictures to be encoded that driver module (210) provides, and carries out the character overlap-add procedure by character information, and the video pictures that stack is finished sends to multi-channel video encoder (250) module and encodes again; Multi-channel video encoder (250) receives relevant coded command through dual port RAM communication driving module (270) from flush bonding processor, be responsible for multi-channel video is carried out encoding compression processing, it supports the Real Time Compression to the accurate definition video source of a road sign, or support Real Time Compression to two to four tunnel intermediate resolution video source, and the coded data that coding is come out sends to flush bonding processor; Watermark encrypting module (240) extracts necessary code coefficient in the process of video coding simultaneously, and by pre-determined cryptographic protocol code coefficient is carried out encryption, at last data encrypted is embedded in the encoding code stream.
2. multichannel video frequency compression system as claimed in claim 1 is characterized in that: also be connected on the described double-nuclear DSP processor (130) and somely be used to send or the IO mouth line (160) of incoming level signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610155128A CN100579221C (en) | 2006-12-11 | 2006-12-11 | Multichannel video frequency compression system based on single-chip double-nuclear DSP constitution |
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| CN200610155128A CN100579221C (en) | 2006-12-11 | 2006-12-11 | Multichannel video frequency compression system based on single-chip double-nuclear DSP constitution |
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| CN100579221C true CN100579221C (en) | 2010-01-06 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101516032B (en) * | 2009-03-13 | 2011-04-13 | 深圳市泛海三江电子有限公司 | Extraction processing method of video data |
| CN104883481A (en) * | 2015-05-11 | 2015-09-02 | 杭州奕霖传感科技有限公司 | Double-spectrum infrared thermal imaging ball machine |
| CN105979228A (en) * | 2016-06-29 | 2016-09-28 | 江苏三棱智慧物联发展股份有限公司 | PC (Personal Computer) video acquisition card with video compression function |
| CN107396072A (en) * | 2017-09-15 | 2017-11-24 | 赵立峰 | A kind of monitoring video device and method |
| CN112363746B (en) * | 2020-11-20 | 2023-06-02 | 清能德创电气技术（北京）有限公司 | Dual-core DSP online upgrading method |
| CN112532954B (en) * | 2020-11-30 | 2023-01-13 | 中国航空工业集团公司西安航空计算技术研究所 | Airborne video integrated processing system |
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Non-Patent Citations (2)
| Title |
|---|
| CF卡与双核DSP的实现. 林海虹，刘慧.电子技术应用，第2002年卷第12期. 2002 |
| CF卡与双核DSP的实现. 林海虹，刘慧.电子技术应用，第2002年卷第12期. 2002 * |
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