Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1983-06-17
1985-10-08
Britton, Howard W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 96, 358135, H04N 714
Patent
active
045463832
ABSTRACT:
In a system for visual telecommunications, e.g. for use by deaf people, an electronic camera (20) makes an image of a moving subject for transmission. The TV type image is passed through a contour extractor (25) to be converted to an animated cartoon line-drawing type image. The contour image is then compressed by means including a sampler (28) for image reduction, a difference detector (30) for selecting only points which change from one image to the next, a filter (34) for rejecting isolated points in the contour image, and an encoder (36) for converting sequences of on/off bits into data words for transmission, via a modem (14) over a telephone line (15). At the other end of the line a similar transmitter/receiver system decodes the received words and reconstitutes the successive images for display on a screen (46). The resulting animated cartoon type of display is adequate for communication by sign language or by lip reading, and is capable of being sufficiently compressed to be transmitted over a normal telephone line.
REFERENCES:
patent: 3746793 (1973-07-01), Sachs et al.
patent: 3767847 (1973-10-01), Haskell et al.
patent: 4027331 (1977-05-01), Nicol
patent: 4075658 (1978-02-01), de Cosnac et al.
patent: 4090221 (1978-05-01), Connor
"An Experimental Visual Telephone System for the Deaf"; Television, vol. #2, pp. 6-10; Pearson and Summer; Mar. 1976.
Conference Record of International Conference on Communications held in Denver, Colo.-Jun. 1981 (vol. 2 of 4).
Article "TRIDEC System Design" from vol. 25, No. 11-12 of Review of the Electrical Communication Laboratories.
Article "Interframe-Codierung fur Videosignale"-Internationale Elektronische Rundschau, 1973, vol. 27, Jan. (No. 1).
Abramatic Jean-Francois
Letellier Philippe
Nadler Morton
Britton Howard W.
Dubno Herbert
INRIA Institute National de Recherche en Informatique et en Auto
Kostak Victor R.
Ross Karl F.
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