ISDN audio color-graphics teleconferencing system

Ikuro Oyaizu; Kiyoto Tanaka; Toshikazu Yamaguchi; Katsuaki Miyabo; Mark Mamoru Takahashi

doi:10.1117/12.50329

1 November 1991 ISDN audio color-graphics teleconferencing system

Ikuro Oyaizu, Kiyoto Tanaka, Toshikazu Yamaguchi, Katsuaki Miyabo, Mark Mamoru Takahashi

Proceedings Volume 1606, Visual Communications and Image Processing '91: Image Processing; (1991) https://doi.org/10.1117/12.50329
Event: Visual Communications, '91, 1991, Boston, MA, United States

Abstract

An audio-graphic teleconferencing system has been developed that uses ordinary personal computers (PCs) interconnected over a basic rate (2B+D) ISDN line. The system supports high-speed transmission of 200-dpi resolution documents read 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 for all the participants to see on the document via a LCD tablet. This paper describes the configuration and performance of the system, focusing mainly on the ISDN-based multi-media transmission method and the method of reducing and enlarging binary images.

Citation Download Citation

Ikuro Oyaizu, Kiyoto Tanaka, Toshikazu Yamaguchi, Katsuaki Miyabo, and Mark Mamoru Takahashi "ISDN audio color-graphics teleconferencing system", Proc. SPIE 1606, Visual Communications and Image Processing '91: Image Processing, (1 November 1991); https://doi.org/10.1117/12.50329

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