Picture transmission system

Television – Two-way video and voice communication – User positioning

Patent

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Details

348 14, 348 18, 348 19, H04N 714

Patent

active

054933293

ABSTRACT:
A picture transmission system used in a picture remote surveillance system or a visual telephone, etc. is provided. This picture transmission system includes, on the transmitter side, an A-D converter for converting an analog video input signal into a digital picture signal, a moving picture converting section for converting the picture signal into a reduced moving picture, a video encoder for compression-encoding the reduced moving picture by the hybrid coding system. In this picture transmission system, on the transmitter side, a switch operative in response to a signal from the receiver side is provided between the A-D converter and the moving picture converting section, and a still picture converting section is inserted between the switch and the video encoder. A picture signal outputted from the A-D converter is permitted to be selectively inputted to either the moving picture converting section or the still picture converting section. Thus, when the switch is switched to the still picture converting section side, a picture signal of one frame is divided into plural picture signals having the same size as that of the reduced moving picture so that those plural divided picture signals are sequentially applied to the video encoder.

REFERENCES:
patent: 5063440 (1991-11-01), Hong
patent: 5389965 (1995-02-01), Kuzma

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