ISDN audio-graphics teleconferencing systems

Kiyoto Tanaka; Ikuro Oyaizu

doi:10.1117/12.150413

1 October 1993 ISDN audio-graphics teleconferencing systems

Kiyoto Tanaka, Ikuro Oyaizu

Author Affiliations +

Journal of Electronic Imaging, Vol. 2, Issue 4, (October 1993). https://doi.org/10.1117/12.150413

Abstract

An audio-graphics teleconferencing system has been developed that uses ordinary personal computers interconnected over a basic rate (2B+D) ISDN line. The system supports high-speed transmission of 200-dpi resolution documents read in by an optical scanner and presented on the displays of the conference participants. While looking at the same material, the conferees can interactively converse and make handwritten notations on the document via an LCD tablet for all the participants to see. We describe the configuration and performance of the system, focusing mainly on the ISDN based multimedia transmission method and the method for reducing and enlarging binary images.

Citation Download Citation

Kiyoto Tanaka and Ikuro Oyaizu "ISDN audio-graphics teleconferencing systems," Journal of Electronic Imaging 2(4), (1 October 1993). https://doi.org/10.1117/12.150413

Published: 1 October 1993

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