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Proceedings Paper

Network transcoder with seamless switching function
Author(s): Naoki Kuwahara; Toshihiko Hata; Toshiharu Nozawa; Anthony Vetro
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Paper Abstract

In a surveillance system with a huge number of cameras, the number of videos to be transmitted and displayed is usually restricted by network bandwidth and the resource of display terminal. Given that the source video is captured at high quality, a network transcoder is used to send video with lower data rate as the default for ordinary scenes, while only extraordinary or unusual scenes are sent with higher quality. With such a scenario, it is necessary to switch from a low quality version of the video to a higher quality video with low latency and in a seamless manner. This paper presents a network transcoder that is able to change the content and the quality of videos seamlessly and with low latency. The novelty of the proposed scheme is possible to change the quality and camera in the same session. Moreover, this paper describes an RTSP enhancement that enables this dynamic transcoding function. Finally, an evaluation of the results is provided.

Paper Details

Date Published: 25 October 2004
PDF: 10 pages
Proc. SPIE 5600, Multimedia Systems and Applications VII, (25 October 2004); doi: 10.1117/12.570570
Show Author Affiliations
Naoki Kuwahara, Mitsubishi Electric Corp. (Japan)
Toshihiko Hata, Mitsubishi Electric Corp. (Japan)
Toshiharu Nozawa, Mitsubishi Electric Corp. (Japan)
Anthony Vetro, Mitsubishi Electric Research Labs. (United States)


Published in SPIE Proceedings Vol. 5600:
Multimedia Systems and Applications VII
Chang Wen Chen; C.-C. Jay Kuo; Anthony Vetro, Editor(s)

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