分布式視頻編碼中運(yùn)動(dòng)估計(jì)的研究.pdf

1、學(xué)科門類—三——堂二分類號(hào)：!!!l!單位代碼—』鯉!L楞緞——巾名廓孿坐廖碩士學(xué)位論文論文題目：分布式視頻編碼中運(yùn)動(dòng)估計(jì)的研究學(xué)生姓名學(xué)號(hào)指導(dǎo)教師學(xué)科專業(yè)研究方向論文提交日期吳砷碩050606朱秀昌教授笪蘭皇笪星竺堡圖像處理與多媒體通信0o八年四月ABSTRACTWiththeincreasingapplicationsofwirelessvideocommunication，thetechnologyofvideocodingtak

2、esamoreandmoreimportantplaceinthefieldofwirelessresearchInwirelessvideoapplication，itisessentialtohaveacodingframeworkwithalow—powerandlowcomplexityencoderMeanwhile，duetothebandwidthlimitationofthewirelesssignalchannel，i

3、trequiresabetterratedistortionperformancewhichthetraditionalcodingarchitectureCannotmeetThedistributedvideocoding(DVC)isanewparadigmforvideocodingarchitecturebasedoninformationtheoryItCanshiftcomplexityfromtheencodertoth

4、edecoderandhastheadvantageofverylightweightencodeLhighcompressionefficiencyandinbuiltrobustnessHencetheDVCbecomesaturefrontierinimageandvideocompressionasitisverysuitableforwirelesscommunicationInthisdissertation，themoti

5、onestimationinDVCisinvestigatedtoimproveratedistortionperformanceofthevideocodingsystemwithoutsacrificingtheencodercomplexityProperalgorithmsarefoundedtopredictthesideinformationatthedecoderandreconstructthecurrentframeT

6、hemaincontributionofthisdissertationiSconcludedasfollows1TheprincipleofDVCislearnedandfurtherresearchisdoneontheWynerZivvideosystem2TheimplementationofmotionestimationandsideinformationpredictionisachievedintheWynerZivvi

7、deosystem3Theresearchontwopracticalsideinformationpredictionmethods，includingthesideinformationpredictionbasedonmultiresolutionmotionestimationandthesideinformationpredictionbasedonMAPcriterionmotionestimationareemphasiz

8、ed4ThesepracticalsideinformationpredictionmethodsareemulatedandcomparedwiththesideinformationpredictionusingblockmatchingmotionestimationThemotionestimationbasedonmultiresolutionmotionestimationCangettoanearly—realmotion

9、fieldThemotionestimationbasedonMAPcriterionhaveamoresmoothfieldMeanwhile，bothofthemrisedthePSNRvalueofthepredictedsideinformationobservablyKeywords：videocoding，distributedvideocoding，WynerZivvideocodingsystem，sideinforma