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Video/audio encoding and decoding method and device

A codec method, video and audio technology, applied in television, closed-circuit television system, pulse modulation TV signal transmission, etc., can solve the problems that cannot meet the needs of digital monitoring system, DSP is difficult to full-duplex real-time codec, etc., to achieve universal strong effect

Inactive Publication Date: 2010-10-13
SUMAVISION TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0004] However, due to the limitation of DSP processing capacity, it is difficult for a single DSP to realize full-duplex real-time encoding and decoding. monitoring system needs

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  • Video/audio encoding and decoding method and device
  • Video/audio encoding and decoding method and device
  • Video/audio encoding and decoding method and device

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0031] The main idea of ​​the technical solution of the present invention is to adopt a double DSP architecture design, realize the cooperative work of the double DSP, and simultaneously realize the encoding and decoding of video and audio.

[0032] figure 1 It is a structural schematic diagram of the video and audio codec device in the specific embodiment of the present invention. like figure 1 As shown, the video and audio codec device includes a master DSP 101 , a slave DSP 102 and an FPGA chip 103 . The main DSP is used for video decoding, audio codec, system master control, user interface application layer program, protocol assembly and analysis, and network transmission and reception. FPGA chip is used to control LCD display, key decoding, status indicator light, and synchronization Clock...

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Abstract

The invention discloses a video and audio coding and decoding method and a device, which adopts double DSP principal and subordinate architectures. The principal DSP sends a code command to the subordinate DSP. Image data are collected from the subordinate DSP and are coded. A video bit stream is generated and is stored in a data postpositional memory zone, and a data receiving command is sent tothe principal DSP; the principal DSP polls the command of the subordinate DSP, and the video bit stream is read according to a data receiving command and is output through a net mouth after being packed; the principal DSP codes by collecting audio data, and an audio bit stream is generated and output through a net mouth after being packed; the principal DSP receives the video bit stream and the audio bit stream which are input from the net mouth and are synchronously processed after being decoded, and images and sounds are output. By adopting the technical proposal of the invention, full-duplex real-time video and audio coding and decoding can be realized and the requirements of bidirectional talkback and bidirectional visibility in video monitoring can be satisfied.

Description

technical field [0001] The present invention relates to the field of multimedia technologies, in particular to a video and audio codec method and device. Background technique [0002] With the development of services such as digital video surveillance, the requirements for coding standards are also getting higher and higher. The H.264 video coding compression standard (hereinafter referred to as H.264) is one of the most advanced compression standards in the world at present. The advantage of H.264 is that it saves about 50% of the code rate compared with MPEG-2 and H.263. It has good network affinity and is conducive to the processing of bit errors and packet loss. Resolution and requirements for different transmission (storage) occasions. [0003] Using a digital signal processor (Digital Signal Processor, DSP) to perform video coding is a cost-effective system implementation solution. DSP has strong processing capability, especially suitable for real-time applications ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/52H04N7/62H04N7/18
Inventor 余晓建张刚张迪
Owner SUMAVISION TECH CO LTD
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