Encoded video television graphics system

Details Encoded video television graphics system Encoded video television graphics system

1986-04-03

1987-11-17

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, H04N 974

Patent

active

047077310

ABSTRACT:
A television graphics system comprises an analog-to-digital converter for digitizing an encoded analog input video signal and generating an encoded digital signal representative of the magnitude of the encoded analog input video signal at a succession of sampling points, a memory device, and a device for writing the encoded digital signal into the memory device. The graphics system also comprises a computer connected to read the encoded digital signal from the memory device, and an arithmetic unit for decoding the encoded digital signal so as to provide decoded digital signals representative of the magnitudes of the luminance and chrominance components of the analog input video signal. The computer is used to modify at least one of the decoded digital signals, and the arithmetic unit encodes the modified digital signal to generate a modified encoded digital signal representative of a modified form of the picture. The modified encoded digital signal is then written into the memory device.

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patent: 4500919 (1985-02-01), Schreiber
patent: 4525736 (1985-06-01), Korman

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