h.2642favc标准帧间预测快速算法的.研究

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1、西安理工大学硕士学位论文Title：FASTINTERPREDICTIONALGORITHMRESEARCHFORMajor：SignalandInformationProcessingName：CuiliJlSupervisor：Associateprof．ZhigangZHANGAbstractSignatm：趔≥Signature：掣莎VH．264／AVCisthelatestvideocodingstandard，manyadvancedtechnologiesareused．Suchasspatialpredictionini

2、ntracoding，adaptiveblocksizeandSub-pixelaccuracymotionestimationandSOon．Withtheuseofthesetechnology,codingefficiencyisgreatlyimproved．Buttherearegreatlycomputationalcomplexityofencoding．So，theapplicationofH．264／AVCwillbelimited，especiallyinreal—timevideocommunicationsand

3、embedded．Inthispaper,abouttheproblemofhighercomputationalcomplexity,motionestimationandinterpredictionmodeselectionalgorithmwillbestudiedandanalyzed．First，anovermuti-motionvectorfieldadaptivesearchtechnologyisproposedinthepaper．ThealgorithmiscombinedMVFASTwithvariableblo

4、cksize，basedonthetypeofvideoimagemotion，themutisearchtemplateisadaptivelyselected．Experimentalresultsshowthattheencodingspeedisgreatlyimprovedinthecaseofthesameinimagequalityandbit—rate．Second，inthispaper,thewholemodeselectionalgorithmisoptimized．Thealgorithmusesthediffe

5、rentefficiencyofencodingmode，andaccordingtotemporalcorrelationofadjacentblockssetthresholdstoavoidunnecessarypatternsearch．Experimentshowthattheencodingspeedisimprovedinthecaseoflittlechangeinbit—rateandimagequality．Finally,withthetwoalgorithms，experimentshowthattheencod

6、ingspeedisimprovedinthecaseoflittlechangeinbit-rateandimagequality．Alsofurtherevidencethestabilityandfeasibilityofthealgorithm．KeyWords：VideoCoding；H．264／AVe；interprediction；motionestimation；modeselection西安理工大学硕士学位论文目录1绪论⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1视频压缩编码技术⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯l1．1．1视频压缩编码的基本概念⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1．2视频压缩编码的基本原理⋯⋯⋯⋯⋯．：．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1．3视频压缩编码国际标准⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．21．1．4视频质量的评价标准⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯41．2论文研究目的及意义⋯⋯⋯．．．⋯⋯⋯⋯⋯．⋯．．．．⋯⋯⋯⋯⋯．．⋯．．⋯．．51．3论文的主要内容及结构安排⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．51．3．1论文的主要内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．⋯⋯⋯．⋯⋯⋯⋯⋯51

8、．3．2论文结构安排⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．62H．264／AVC视频编码标准⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．72．1H．264／AVC标准概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯