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Proceedings Paper

Mobile video communications techniques and services
Author(s): Hisashi Ibaraki; Tsuyoshi Fujimoto; Shizuo Nakano
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Paper Abstract

This paper describes picture information transmission for portable multimedia terminals. The radio links used in portable multimedia terminals have narrower channel capacity and higher transmission error rates than wired links such as those used in ISDN. To transmit multimedia information of satisfactory quality over radio links, robustness against radio link errors must be improved, because picture deterioration is much more apparent than audio deterioration. First, the effects of transmission errors on picture quality are analyzed using the H.261 coding system used for ISDN picture communication. Second, the relationship among bit error rate, terminal velocity, and picture quality is analyzed and the deterioration mechanisms of picture quality are discussed. Three techniques for improving picture quality against radio link errors are proposed.

Paper Details

Date Published: 21 April 1995
PDF: 10 pages
Proc. SPIE 2501, Visual Communications and Image Processing '95, (21 April 1995); doi: 10.1117/12.206635
Show Author Affiliations
Hisashi Ibaraki, NTT Human Interface Labs. (Japan)
Tsuyoshi Fujimoto, NTT Human Interface Labs. (Japan)
Shizuo Nakano, NTT Human Interface Labs. (Japan)

Published in SPIE Proceedings Vol. 2501:
Visual Communications and Image Processing '95
Lance T. Wu, Editor(s)

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