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Proceedings Paper

Standardization Efforts In Video Teleconferencing
Author(s): Paul J. Nordquist
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Paper Abstract

This paper discusses the status of the activities of the International Consultative Committee on Telegraph and Telephone (CCITT) in preparing technical recommendations for international video teleconferencing systems. It presents a number of driving factors which influence the preparation of recommendations, and discusses the salient technical aspects of the work. The efforts to date, which have resulted in preparation of three new draft recommendations, have concentrated on the development of a hypothetical reference connection for long distance interconnections, selection of interconnect bit rates, and in the selection of the types of video codecs to be employed. A hypothetical reference connection (HRC) which shows interconnection of a 2.0 Mb/s region with a 1.5 Mb/s region indicates that the transmission bit rate used on the international portion would be 1.5 Mb/s. The CCITT Study Group is also considering interconnect bit rates at multiples and submultiples of 384 kb/s. The Study Group has selected interframe type codecs for some applications and is currently studying both interframe and intraframe codecs for use in teleconferencing systems.

Paper Details

Date Published: 4 December 1984
PDF: 5 pages
Proc. SPIE 0504, Applications of Digital Image Processing VII, (4 December 1984); doi: 10.1117/12.944890
Show Author Affiliations
Paul J. Nordquist, GTE Laboratories Incorporated (United States)

Published in SPIE Proceedings Vol. 0504:
Applications of Digital Image Processing VII
Andrew G. Tescher, Editor(s)

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