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Proceedings Paper

Transmission of H.263 video over wireless channels
Author(s): Hang Liu; Magda El Zarki
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Paper Abstract

The effects of digital transmission errors on H.263 codecs are analyzed and the transmission of H.263 coded video over a TDMA radio link is investigated. Numerical results for the channel SNR required for providing acceptable video quality under various channel coding and interleaving strategies are presented. Fading on radio channels causes significant transmission errors and H.263 coded bit streams are very vulnerable to errors. Therefore, powerful forward error correction (FEC) codes are necessary to protect the data so that it can be successfully transmitted at acceptable signal power levels. However, FEC imposes a high bandwidth overhead. In order to make best use of the available channel bandwidth and to alleviate the overall impact of errors on the video sequence, a two-layer source coding and unequal error protection scheme based on H.263 is also studied. The scheme can tolerate more transmission errors and leads to more graceful degradation in quality when the channel SNR decreases. In lossy environments, it yields better video quality at no extra bandwidth cost.

Paper Details

Date Published: 22 March 1996
PDF: 11 pages
Proc. SPIE 2668, Digital Video Compression: Algorithms and Technologies 1996, (22 March 1996); doi: 10.1117/12.235436
Show Author Affiliations
Hang Liu, Univ. of Pennsylvania (United States)
Magda El Zarki, Univ. of Pennsylvania (United States)


Published in SPIE Proceedings Vol. 2668:
Digital Video Compression: Algorithms and Technologies 1996
Vasudev Bhaskaran; Frans Sijstermans; Sethuraman Panchanathan, Editor(s)

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