基于MPEG-4的數(shù)字視頻監(jiān)控系統(tǒng)的數(shù)據(jù)壓縮及編碼技術(shù).pdf

1、華南理工大學碩士學位論文基于MPEG4的數(shù)字視頻監(jiān)控系統(tǒng)的數(shù)據(jù)壓縮及編碼技術(shù)姓名：黃瑞龍申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：陳立定20050613：蘭塑堅!：查蘭堡主主垡笙蘭AbstractMPEG一4isusedinmanyfieldsInthischaper，mainlydesignsaencodingsoftaimatdigitalvideosurveillancefieldMPEG一4putsforwadacon

2、ceptbasedonvideoobjectcodingcomparetoadvavcedstandardItnotonlycanencoderectangularframe，butalsoprovidestoolsforencodingarbitraryshapeobject，thatmanipulatingandcontrollingvideo—objectispossibleItcancontrolbits—rateofobjec

3、ts，thatisreasonablyallocatebits—rateofobjectsbaseontheirweightinessandensuresubjectivequalityofpictureMPEG一4hasspatialscalabilityandtemporalscalabilityItcanprocessflexibilityspatialandtemporalscalabilitycodingaccordingto

4、actualbandwidthanderrorbitsrateSpatialscabilityisusinginterpolatinginthepictureofbaselayerReducingorincreasingresolutioninordertofullymakeuseofbandwidthandimprovepicturequalityTemporalscabilityisincreasingframe—rateofenh

5、ancementlayer(s)onconditionthatbandwidthallowingandreducingframeratewhenthebandwidthisbecomingbadThischaperdesignedaencodingsoftaimatperformanceofefficiencecompression，alternationbasedcontent(mannipulation，edition，access

6、ing)，mutilevelscabilityofMPEG一4andcarriedouttestingofsoftperformanceTheresultindicatesthatthesoftisbettercompressionefficience，useralternationandmoresuitabletotransmissionovernetworkthanencodingsoftofMPEG2Performancecomp

7、aringiscarriedoutbetweemencodingsoftofMPEG一4andVMl8checkoutmodelandtheresultindicatesthatperformancedon’tgodegressivedistinctlyInordertoencodereal—timevideosream，softoptimizingisessentialBecausethecomputationofDCTandmoti

8、onestimationtakesupthemostofcomputationintheencodingsoft，thesealgorithmsoptimizingiscarriedoutBecausethesoftrunsanddebugsonthepersonnalcomputer，softoptimizingiscarriedoutaimatsetsofMMXtestingofoptimizingeffectiscarriedou