運(yùn)動估計(jì)快速搜索算法的研究與改進(jìn).pdf

1、華中科技大學(xué)碩士學(xué)位論文運(yùn)動估計(jì)快速搜索算法的研究與改進(jìn)姓名：仲玲申請學(xué)位級別：碩士專業(yè)：計(jì)算機(jī)系統(tǒng)結(jié)構(gòu)指導(dǎo)教師：余勝生2003.5.8華中科技大學(xué)碩士學(xué)位論文AbstractVideocompressiontechniqueplaysaveryimportantroleinvideocommunicationservicessuchasdigitalTv，HDTVvideophone，videoconferenceandmultime

2、diaAnewvideocodingrecommendation，H264，hasbeenproposedby111JTItachievesverylowbitrate，highqualityandhighcompressionratiobyadoptingseveralnewtechniquesHowever’thecurrentencoderCannotgainreal—timeperformance，SOoptimizationC

3、anbedonetoitThereexistsstrongtemporalcorrelationbetweenadjacentframesinavideosequenceAsanefficienttoolforvideocompression，motionestimation∞E)andcompensation(MC)CaneliminatethehighredundancybetweenfrBnle$andachieveallighc

4、ompressionratioBlockmatchingalgorithmisthemostwidelyusedmethodbywhichthebestmatchisfoundfromtheblockinthecurrentframetothereferenceframeThesimplestandmostreliablewayisfullsearchHoweverduetoitslargecomputationalload，itisn

5、otsuitableforreal，timeapplicationSoseekingforfastandaccuratemotionestimationtechniquesisataskthatinterestsmanyres嘲trchersAnimprovedfastmatchingalgorithm，successivelysampleddistortionmeasure，ispresentedn坨completedistortio

6、nbetweenblocksisnotcalculatedatonceineachblockmatchingoperation，however，successivelysampleddistortionfrompartialpixelsofablockisusedinsteadCombinedwitllextendedsquarese砌orderandinitializerefinethismethodCanmakethematchin

7、gprocessfasterandmoreaccurateExperimentalresultsshowcomputationalpayloadCanbesavedby85％comparedtofullsearchMoreoverthismethodCanbeadaptedtOotherfastsearchingalgorithmsItisprovedthattheproposedalgorithmcanhclptoimprovethe