Title :
Evaluation of RTP immediate feedback and retransmission extensions [video streaming applications]
Author :
Kropfberger, M. ; Hellwagne, Hermann
Author_Institution :
Dept. of Inf. Technol., Klagenfurt Univ., Austria
Abstract :
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).
Keywords :
adaptive signal processing; state feedback; transport protocols; video servers; video streaming; RTP immediate feedback; RTP retransmission extensions; lossy transmission conditions; network conditions feedback; packet retransmission; quality level switching; real time transport protocol; reference frame selective retransmission; temporal video adaptation; video streaming servers; visual quality gain; Bandwidth; Feedback; Fluctuations; Information technology; Internet; Modems; Prefetching; Protocols; Streaming media; Switches;
Conference_Titel :
Multimedia and Expo, 2004. ICME '04. 2004 IEEE International Conference on
Print_ISBN :
0-7803-8603-5
DOI :
10.1109/ICME.2004.1394593
