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Research on Block Based Intra Prediction Coding

Author: ZhangKeHao
Tutor: ZhaoDeBin
School: Harbin Institute of Technology
Course: Computer Science and Technology
Keywords: Intra prediction Block-matching Match the search Template matching Hybrid video coding
CLC: TN919.81
Type: Master's thesis
Year: 2008
Downloads: 46
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In recent years, with the formulation of the next-generation video coding standard H.264/MPEG-4 AVC, AVS video coding technology is one step toward maturity. Intraframe prediction technology as an important component of hybrid video coding framework , an important role to improve the efficiency of video coding . However, compared with the interframe coding technique , the intraframe prediction encoding efficiency also greatly improved space. Further improve the efficiency of intra prediction encoding of the target , this article from the following two aspects to improve the intra - frame predictive coding technique . Design intraframe prediction algorithms based on block matching . For texture information structure similar characteristics , learn from mature applications in interframe coding block matching technique , designed a block-based intra prediction algorithm . Prediction coded macroblock surrounding pixels with the conventional intraframe prediction methods, the present algorithm using information of intra- coded macro blocks to construct the reference frame of the current macro block in the reference frame search and the current coded macroblock most the similar block as its predicted value . CIF and QCIF format test sequences , the algorithm PSNR average 0.14dB improvement , especially in the rich texture information foreman CIF sequence , PSNR 0.55dB gain . Experimental results show that the intra prediction algorithm based on the texture of block matching effectively improved the texture information coding efficiency . Intra coding algorithm design is based on matching search . DCT transform for the traditional hybrid coding framework based on block matching intra prediction algorithm performance on the missing , drawing algorithm for matching search (matching pursuit) thinking , design based on matching search block matching intra prediction algorithm . The algorithm consists of three main parts , the residual block matching library building , block - matching intra prediction technique and the residual block matching algorithm . Preliminary experimental results show that the algorithm to improve the coding efficiency a great deal of room for improvement . Matching the search based on the intra - coding algorithm to improve the loss of performance of the intra prediction based on a block matching algorithm in the DCT transform process , to further improve the encoding efficiency of the intra prediction algorithm based on block matching .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
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