DocumentCode :
3424870
Title :
Turbo-coded transmission of smoothed H.263 video for the cdma2000 downlink
Author :
Iskander, Cyril-Daniel ; Mathiopoulos, P. Takis
Author_Institution :
Dept. of Electr. & Comput. Eng., British Columbia Univ., Canada
Volume :
2
fYear :
2002
fDate :
3-6 Nov. 2002
Firstpage :
1325
Abstract :
H.263 video bitstreams can be characterized by high peak rates, frequent rate variations, and a high sensitivity to bit errors. Moreover, many interactive/streaming video applications require a tight bound on delay. The paper evaluates the performance of H.263 video transmission on the downlink of a cdma2000 system, and examines some of the tradeoffs needed in the design of such a system in order to meet the above requirements. In order to match the variable source rate to the bandwidth available to mobile cdma2000 video users, real-time smoothing of the video stream is performed prior to transmission. This introduces a delay at the video decoder which varies with the amount of buffering. To reduce the channel bit-error rate (BER), turbo coding is employed, which is also responsible for a delay at the receiver end. Hence, a tradeoff must be achieved between the amount of smoothing and error-correction, in order to respect the total end-to-end delay restrictions. Using entire system simulations, we assess the effects of the parameters of both the smoothing algorithm and the turbo coder on the received picture quality, for a given maximum delay: this work thus presents a joint optimization of real-time smoothing and turbo coding/decoding for H.263 video applications.
Keywords :
3G mobile communication; buffer storage; code division multiple access; decoding; delays; error statistics; mobile radio; smoothing methods; turbo codes; video codecs; video coding; visual communication; BER; H.263 codec; H.263 video bitstreams; cdma2000 downlink; channel bit-error rate; end-to-end delay restrictions; error-correction; interactive video; mobile users; optimization; smoothing algorithm; streaming video; turbo coding; turbo-coded transmission; Bandwidth; Bit error rate; Councils; Decoding; Delay effects; Downlink; Real time systems; Smoothing methods; Streaming media; Turbo codes;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
ISSN :
1058-6393
Print_ISBN :
0-7803-7576-9
Type :
conf
DOI :
10.1109/ACSSC.2002.1196995
Filename :
1196995
Link To Document :
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