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Proceedings Paper

ISDN audio color-graphics teleconferencing system
Author(s): Ikuro Oyaizu; Kiyoto Tanaka; Toshikazu Yamaguchi; Katsuaki Miyabo; Mark Mamoru Takahashi
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Paper 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.

Paper Details

Date Published: 1 November 1991
PDF: 12 pages
Proc. SPIE 1606, Visual Communications and Image Processing '91: Image Processing, (1 November 1991); doi: 10.1117/12.50329
Show Author Affiliations
Ikuro Oyaizu, NTT Human Interface Labs. (Japan)
Kiyoto Tanaka, NTT Human Interface Labs. (Japan)
Toshikazu Yamaguchi, NTT Human Interface Labs. (Japan)
Katsuaki Miyabo, NTT Human Interface Labs. (Japan)
Mark Mamoru Takahashi, NTT Human Interface Labs. (Japan)

Published in SPIE Proceedings Vol. 1606:
Visual Communications and Image Processing '91: Image Processing
Kou-Hu Tzou; Toshio Koga, Editor(s)

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