Video codec, for a videophone terminal of an integrated services

Details Video codec, for a videophone terminal of an integrated services Video codec, for a videophone terminal of an integrated services

1993-02-23

1994-11-22

Chan, Wing F.

Television

Two-way video and voice communication

User positioning

348 17, H04M 1100

Patent

active

053673310

ABSTRACT:
A video codec for a videophone terminal of an integrated services digital network. The codec is organized to receive firstly image signals from a television camera so as to transmit them, after compressing and encoding them, to a remote video decoding unit, via a digital transmission line, and secondly similarly-processed image signals via the digital transmission line, so as to decompress and decode them for a television screen receiver locally connected to the video codec. The video codec includes a processing unit, of the integrated circuit type, co-operating with a single external memory plane both to compress and encode data to be transmitted, and also to decompress and decode received data, with the assistance of internal operational components time shared so as to apply known methods to transmission and to reception.

REFERENCES:
patent: 4949169 (1990-08-01), Lumelsky et al.
patent: 5046080 (1991-09-01), Lee et al.
Patent Abstracts of Japan, vol. 11, No. 314 (E-549) May 19, 1987 & JP-A-62 108 690 (Nippon Telegr & Teleph Corp) Nov. 6, 1985.

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