Delivering audiovisual content with MPEG-21-enabled cross-layer QoS adaptation

(整期优先)网络出版时间:2006-05-15
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Futuremultimediacommunicationsystemshavetosupporttheuser'sneeds,theterminalcapabilities,thecontentspecificationandtheunderlyingnetworkingtechnologies.Therelatedprotocolsandapplicationsmustbedesignedfromthisintegrationperspectiveinacross-layercentricmanner.Inthispaper,weproposeanimplementationofastreamingservice(e.g.,TelevisionoverIPservice)withaunifiedQoSmanagementconceptthatenablesanIPdrivenintegrationofdifferentsystemcomponents(terminal,user,content,andnetwork).TheMPEG-21frameworkisusedtoprovideacommonsupportforimplementingandmanagingtheend-to-endQoS.Themainfocusofthispaperisonthearchitecturedesign,protocolsspecificationandimplementationevaluation.PerformanceevaluationsusingPSNRandSSIMobjectivevideoqualitymetricsshowthebenefitoftheproposedMPEG-21-enabledcross-layeradaptation.