Video signal and output device for freeze-frame video telephone

Details Video signal and output device for freeze-frame video telephone Video signal and output device for freeze-frame video telephone

1990-09-07

1992-05-26

Kostak, Victor R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

379 53, H04N 712

Patent

active

051172860

ABSTRACT:
A video input and output device which generates sampling frequency synchronized to the video signal, and stores video image of 256 grey levels, 8 bits wide, per pixel in memory after realtime sampling and quanitization following the selection of the necessary part of the input video signal. The invention also adopts a two-dimensional addressing technique for the simplification of the hardware structure, and can easily redefine the size of the video image for following future trends.

REFERENCES:
patent: 4932047 (1990-06-01), Emmons et al.
patent: 4979028 (1990-12-01), Minematsu et al.
patent: 4980761 (1990-12-01), Natori

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