Side information generating system and method based on distribution type video encoding

Abstract

The invention discloses side information generating system and method based on distribution type video encoding, which belongs to the technical field of video encoding and mainly solves the problem that the original image information is lacked when the distribution type video encoding system is used to generate side information. The method has an encoder relevance calculating part, a decoder movement evaluating part, a movement smoothing part and a movement compensating part. The relevance among the original image frames is calculated by the encoder, and sent to the decoder. On the basis of relevance, forward and backward movements are evaluated by front and next decoded key frames, and the obtained movement vectors are detected and corrected. Then, the accurate movement vectors are obtained by the bidirectional movement evaluation and movement smoothing of an overlapped block. Finally, the side information is generated by the bidirectional movement compensation of the overlapped block. The invention greatly improves the object and subject quality of the side information and further enhances the quality of the decoded and restored image, and can be applied to the simple video communication system of the terminal equipment.

Description

technical field [0001] The invention belongs to the technical field of video coding, relates to a distributed video coding system and motion estimation, smoothing and frame interpolation by using a predecessor and a subsequent decoded key frame, and can be used in a distributed video coding system and other frame interpolation fields. Background technique [0002] Traditional video coding standards such as MPEG-X and H.26X series mainly rely on the encoder to use the statistical characteristics of the encoded signal to achieve compression encoding, resulting in the computational complexity of the encoder being 5 to 10 times that of the decoder. In recent years, some new video applications, such as wireless video sensor network, mobile video phone and wireless video surveillance, etc. are rapidly integrating and changing people's lives. However, these emerging multimedia applications put forward different requirements for the video codec system. That is, the encoder needs to ...

AI Technical Summary

Problems solved by technology

[0008] The side information generated by the interpolation of the existing search methods lacks the information of the original Wyner-Ziv frame on the encoding side, and does not use its accurate correlation with the original image of the adjacent key frame to assist the motion estimation and smoothing of the decoding side, resulting in motion at the decoding end Estimation is easy to fall into local optimization, and the searched motion vectors are not accurate enough; the motion vectors are optimized uniformly, and no separate measures are taken for unreliable motion vectors; motion compensation only uses simple mean interpolation, and the generated side information has obvious block effect

These shortcomings all affect the quality of side information generation, further affecting the rate-distortion performance of the entire system

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