Adaptive Frame Group Distributed Video Coding and Decoding Method Based on Mode Decision

A technology of distributed video, coding method, applied in the direction of digital video signal modification, television, electrical components, etc.

Active Publication Date: 2011-12-07
HOHAI UNIV CHANGZHOU
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Problems solved by technology

Today's video compression coding (MPEG-x series and H.26x series) because the encoder undertakes a large number of highly complex calculations such as motion estimation, transformation, quantization, entropy coding and corresponding decoding, the coding complexity is 5 to 10 times that of decoding The above, so the traditional video coding technology is no longer suitable for these applications, it is necessary to find a new coding compression method

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  • Adaptive Frame Group Distributed Video Coding and Decoding Method Based on Mode Decision
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  • Adaptive Frame Group Distributed Video Coding and Decoding Method Based on Mode Decision

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings.

[0068] The self-adaptive frame group DVC system based on mode decision proposed by the present invention can be realized by software or embedded hardware system. figure 1 Provided the structural block diagram that the present invention proposes DVC system, wherein camera can be the video input terminal of some low-energy equipments such as mobile phone camera, sensing network camera; Encoder can be realized with software, general situation is DSP or other embedded parallel machine; the decoder is generally a high-performance PC, which can be a DSP or other embedded parallel machines; the network can be wired or wireless.

[0069] Encoder block diagram as figure 2 As shown, the encoder judges the frame mode of the input image, divides the frame into key frame, quasi-key frame, and WZ frame for adaptive frame group coding. Four block-based encoding modes are adopted: ...

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Abstract

The invention discloses a mode decision based adaptive GOP (group of pictures) coding and decoding method which can improve rate distortion performance. Frames of the GOP which are to be coded are classified into key frame, secondary key frame and WZ frame, wherein the secondary key frame block is coded in an inter-frame mode, intra-frame mode or Skip mode; and the WZ frame block is coded in a WZmode, the intra-frame/WZ mode or Skip/WZ mode. The GOP decoding is classified into key frame decoding, secondary key frame decoding and WZ frame decoding, wherein, the key frame is decoded in the conventional intra-frame mode; the secondary key frame is decoded in the inter-frame mode, intra-frame mode or Skip mode; and the WZ frame is decoded in a WZ block mode, rough intra-frame block mode or Skip block mode. The decoded key frames and secondary key frames of the GOP are stored in a memory. By adopting the invention, both coding efficiency and final decoding quality can be improved for the whole system so that the rate distortion performance is improved greatly under the condition that the calculated amount is slightly improved.

Description

Technical field [0001] The invention involves a distributed video coding and decoding method based on a model decision -making, which is the field of video coding. Background technique [0002] With the emergence and application of new technologies such as wireless multimedia communication and wireless video sensing networks, new requirements have been proposed to the coding system of video: due to the limited battery capacity, digital processing capacity and computing capacity of wireless video encoder, wireless video is requiredThe encoder is low -power and low complexity; due to the limitation of the transmission rate, the encoder is required to have high compression efficiency; due to the use of wireless access and transmission, the video signal transmission is required to be strong.Today's video compression coding (MPEG-X series and H.26X series) are responsible for a large number of highly complicated calculations such as motion estimation, transformation, quantification, e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/50H04N19/13H04N19/176H04N19/177
Inventor 朱金秀李莉邵永琴孟雨
Owner HOHAI UNIV CHANGZHOU
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