資源描述：
《h.264視頻編碼標(biāo)準(zhǔn)分析與算法優(yōu)化研究》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、碩士論文：H.264視頻編碼標(biāo)準(zhǔn)分析與算法優(yōu)化研究checked.Finally,basedontheanalysisofthecharacteristicofmotionestimationinH.264andsomeobservationsfromtheexperiments,anovelfastmotionestimationalgorithmissuggestedtoreducethecomputationalloadofmotionestimationdramatically.Theproposedalgorithmcombinesp
2、redictivemodereductiontechnique,selectivepixelmatchingmeasureandsimplifiedreferenceframediscriminationstrategytospeedupthefull-pixelmotionestimationprocess.Then,adirectionbasedselectionruleisemployedtofurtherdecreasethesub-pixelcandidatesearchpoints.Experimentalresultshavesh
3、ownasfollows:1)Theproposedfastintra-predictionmodedecisionalgorithmreduces45%computationalcomplexityonaverage,whileincurringonly0.040dBlossinPSNRand2.80%incrementonthetotalbiteratecomparedwiththatofexhaustivemodedecision,whichisadefaultapproachsetintheJMreferencesoftware.2)T
4、heproposedfastinter-predictionmodedecisionalgorithmachievesareductionof56%computationalcomplexityonaverage,whileincurringonly0.059dBlossinPSNRand0.20%incrementonthetotalbitratecomparedwiththatofexhaustivemodedecision,whichisadefaultapproachsetintheJMreferencesoftware.3)Thepr
5、oposedfastmotionestimationalgorithmachievesareductionof87%computationalloadonaverage,whileincurringonly0.033dBlossinPSNRand0.56%incrementonthetotalbitratecomparedwiththatofexhaustivemotionestimationprocess,whichisadefaultapproachsetintheJMreferencesoftware.Insummary,allthefa
6、stalgorithmsproposedinthisdissertationcanbeextensivelyusedinalltheH.264/AVCvideocodingstandardapplication,andalsocanbeservedasanexampleontheothermultimediasoftwarealgorithmoptimization.KeyWords:VideoCoding,H.264/AVC,AlgorithmOptimization,ModeDecision,MotionEstimation4碩士論文：H.
7、264視頻編碼標(biāo)準(zhǔn)分析與算法優(yōu)化研究第一章緒論1.1課題研究背景隨著社會的不斷進(jìn)步和多媒體信息技術(shù)的發(fā)展，人們對信息的需求越來越豐富，方便、快捷、靈活地通過語音、數(shù)據(jù)、圖像與視頻等方式進(jìn)行多媒體通信已成不可或缺的工具。其中視覺信息給人們直觀、生動的形象，因此圖像與視頻的傳輸更受到廣泛的關(guān)注。然而，視頻數(shù)據(jù)具有龐大的數(shù)據(jù)量，以普通的25幀每秒，CIF格式（分辨率為352×288）的視頻圖像為例，一秒鐘的原始視頻數(shù)據(jù)速率高達(dá)3.8M字節(jié)。不對視頻信號進(jìn)行壓縮根本無法實(shí)時傳輸如此龐大的數(shù)據(jù)量，因此，視頻壓縮技術(shù)成為研究熱點(diǎn)。從1948年提出電視信號數(shù)
8、字化以來，經(jīng)過半個多世紀(jì)的研究和發(fā)展，圖像壓縮編碼技術(shù)不僅在理論研究上取得了重大進(jìn)步，而且在實(shí)際應(yīng)用中也獲得了很大成果；視頻編碼技術(shù)也日趨成熟，其標(biāo)志
