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Evaluation of RTP immediate feedback and retransmission extensions [video streaming applications]

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2 Author(s)
Kropfberger, M. ; Dept. of Inf. Technol., Klagenfurt Univ., Austria ; Hellwagner, H.

Modern video streaming servers should adapt, and switch quality levels of, the streamed data according to precise and timely feedback about the network conditions, and should also incorporate selective retransmissions of important reference frames (I- and P-VOPs). This work evaluates two recent IETF Internet drafts on RTP (real time transport protocol) extensions for immediate feedback and retransmission and shows, in conjunction with temporal video adaptation, how a substantial visual quality gain can be achieved by using those extensions (up to 4.4 dB PSNR under lossy conditions).

Published in:

Multimedia and Expo, 2004. ICME '04. 2004 IEEE International Conference on  (Volume:3 )

Date of Conference:

27-30 June 2004