Undamaged encoding and decoding method and system based on interweave forecast

Abstract

The invention relates to a video intraframe lossless encoding and decoding method based on interleaving prediction and the system thereof, and belongs to the technical field of the video encoding and decoding for signal processing. In the encoder end, each intra-frame coding frame (I frame) is down-sampled to form four subimages in certain sequence, encoding based on standard prediction is adopted for the first subimage, and decoding based on the interleaving prediction is adopted for the three subsequent subimages in sequence; in the decoder, each received I frame code stream is used for decoding the code stream of the first subimage section according to the standard prediction, and decoding the code stream of the three subsequent subimages on the basis of the pixel level interleaving prediction, and finally up-sampling combination is performed to the four decoded subimages to obtain I frame decoding image. Compared with the standard prediction method, the interleaving prediction method of the invention is provided with better prediction performance, thereby improving the video intraframe lossless compression performance.

Description

technical field [0001] The present invention relates to a method in the technical field of video encoding and decoding for signal processing, in particular to a lossless encoding and decoding method and system in a video frame based on interleaving prediction. Background technique [0002] Intra-video lossless compression technology is crucial for high-quality video storage, editing and transmission applications. The new-generation international video coding standard H.264 / AVC supports intra-frame lossless video compression. To improve the efficiency of intra-frame coding, the H.264 / AVC standard introduces a direction-based spatial prediction technology. Spatial prediction technology refers to predicting the pixels in the current macroblock (or block) by using the high spatial correlation characteristics between adjacent pixels of the image and using the reconstructed pixel values ​​adjacent to the current macroblock (or block). Direction-based spatial pixel prediction mean...

AI Technical Summary

Problems solved by technology

Therefore, for images with complex textures and structures, the prediction performance of pixels within a block still needs to be improved

[0003] Through document retrieval to prior art, it is found that Yung-Lyul Lee, Ki-Hun Han, Gary J.Sullivan et al. published in 2006 of "IEEE Trans. In the article "ImprovedLossless Intra Coding for H.264 / MPEG-4AVC" (improved H.264 / MPEG-4AVC frame lossless coding method) published on pages 2610 to 2615 of the 15th issue, the use of pixel-by-pixel recursive prediction is proposed. Encoding with the method of encoding, the compression performance is improved. This method is implemented by performing integer transformation on the residual image obtained by a specific prediction mode, but this method further increases the complexity of the encoding, and is only suitable for images in a specific direction. Predictive mode also inhibits predictive performance on complex textured images

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