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Optimal packetisation of MPEG-4 using RTP over mobile networks

Optimal packetisation of MPEG-4 using RTP over mobile networks

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The introduction of third-generation wireless networks should result in real-time mobile video communications becoming a reality. Delivery of such video is likely to be facilitated by the real-time transport protocol (RTP). Careful packetisation of the video data is necessary to ensure the optimal trade-off between channel utilisation and error robustness. Theoretical analyses for two basic schemes of MPEG-4 data encapsulation within RTP packets are presented. Simulations over a GPRS (general packet radio service) network are used to validate the analysis of the most efficient scheme. Finally, a motion adaptive system for deriving MPEG-4 video packet sizes is presented. Further simulations demonstrate the benefits of the adaptive system.

Inspec keywords: cellular radio; packet radio networks; data encapsulation; visual communication; transport protocols

Other keywords: motion adaptive system; mobile networks; MPEG-4; GPRS; RTP; real-time mobile video communications; channel utilisation; optimal packetisation; adaptive system; General Packet Radio Service; error robustness; third-generation wireless networks; packetisation; data encapsulation; real-time transport protocol; video packet sizes

Subjects: Telecommunication applications; Mobile radio systems; Protocols

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