Abstract. Despite much research in the field of mobile multimedia, delivery of real-timeinferactive video over noisy wireless channels remains a challenging problem. Two of the major issues in providing true end-to-end mobile multimedia capability are interoperability between platforms and networks and the poor performance of video compression algorithms in error-prone environments. This paper presents a method for prioritising data partitioned MPEG-4 video in a way suitable for transmission over a mobile network. The effectiveness of the technique is demonstrated by examining the performance when transmitted using the Real-Time Transport protocol over GPRS (General Packet Radio Service) data channels under varying channel conditions.
One of the stated aims of 3 rd Generation mobile communications systems is to provide enhanced multimedia services to the user. Such services will include an integration of video, high-quality audio and data services. This paper describes a real-time mobile video communications system which employs ETSI's GPRS mobile packet system as a mobile access medium. Subjective performance tests are carried out for the error-resilient MPEG-4 video decoder using a real-time GPRS radio access emulator.
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