基于模糊集的時空域差錯掩蓋技術研究.pdf

1、南京郵電大學碩士學位論文基于模糊集的時空域差錯掩蓋技術研究姓名：駱華燕申請學位級別：碩士專業(yè)：信號與信息處理指導教師：朱秀昌20100401南京郵電大學碩二L研究生學位論文AbstractAbstractBiterrorsorpacketslostoccurduringvideotransmissionduetonoisesinthephysicalchannelandfinallyleadtothedegradationofvideo

2、qualityThusbesidesFEC，ARQandothererrorresiliencestrategies，errorconcealment(EC)isneededatthedecodersidetoreducethedegradationandrecoverthedamagedimagesErrorConcealmentutilizesthesmoothnessandcontinuitypropertiesintempora

3、landspatialdomaintorecovercorruptedblocksfromthesurvivedsurroundingFuzzysetstheoryusesthesoftcomputingmethodtoreplacethetraditionalhardcomputingenvironmentappliestothosefuzzyandimpreciseinformationItispreciselybecausethe

4、imageinformationwithacertaindegreeofambiguityandtemporal—spatialsimilarityitcanmakeuseoffuzzysettheoryforimageprocessingandvideoerrorconcealmentFirst，thispaperbrieflyintroducesvariousspatialandtemporalerrorconcealmentalg

5、orithmsbasedonclassicalstatisticsmathematics，includingthepixelinterpolationmethods、theblockmatchingmethodsinspatialdomainandTemporalreplacement、AveragemotionvectorsintemporaldomainBesides，thelimitationsandadvantagesofthe

6、sealgorithmsareresearcheddeeplyThelathealgorithmsbasedonfuzzysetsareproposed，includingthealgorithmbasedonfuzzyreasoningThetheorybasis，concealmentstepsandthekeyproblemsarediscussedindetailsFuzzyreasoningisappliedtojudgeth

7、einitialerrorconcealmentIftheinitialconcealmentisnotaccurate，WienerinterpolationisemployedtoimprovethequalityofconcealmentFinallytheexperimentsarecarriedoutbasedonthereferencesoftwareJM151ofH264andMATLAB，differentvideose

8、quencesaretestedBesides，real—timecommunicationPCflatisestablishedforerrorconcealmentbasedoncampusnetworkTheexperimentalresultsshowthatthealgorithmsproposedinthispapersurpasstheclassicalspatialandtemporalalgorithms，canimp