Video transcoding proxy for 3Gwireless mobile Internet access

Transcoding proxies for mobile World Wide Web access have been developed. I n the near future, wideband mobile communication systems such as IMT-2000 w ill emerge, and these proxies will have to cope with a variety of media suc h as video. In this article we identify issues involved in viewing a video stream in a mobile computing environment; to handle these issues, we propos e a video transcoding system and its control method. These mechanisms provi de stable transmission of video data and comfortable video viewing on user clients by estimating the communication conditions, client device capabilit ies, and user preferences.