Mobile video communications techniques and services

Hisashi Ibaraki; Tsuyoshi Fujimoto; Shizuo Nakano

doi:10.1117/12.206635

21 April 1995 Mobile video communications techniques and services

Hisashi Ibaraki, Tsuyoshi Fujimoto, Shizuo Nakano

Proceedings Volume 2501, Visual Communications and Image Processing '95; (1995) https://doi.org/10.1117/12.206635
Event: Visual Communications and Image Processing '95, 1995, Taipei, Taiwan

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.

Citation Download Citation

Hisashi Ibaraki, Tsuyoshi Fujimoto, and Shizuo Nakano "Mobile video communications techniques and services", Proc. SPIE 2501, Visual Communications and Image Processing '95, (21 April 1995); https://doi.org/10.1117/12.206635

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