Television graphics system

Details Television graphics system Television graphics system

H - Electricity

04

N

350/3

H04N 1/40 (2006.01) G06F 3/033 (2006.01) H04N 9/74 (2006.01)

Patent

CA 1272525

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 magni- tude 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 rep- resentative of a modified form of the picture. The modified encoded digital signal is then written into into the memory device.

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