Video signal processor with bias error compensation

Details Video signal processor with bias error compensation Video signal processor with bias error compensation

1984-03-02

1986-07-08

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 29, 358 74, 358243, H04N 920, H04N 568, H04N 916, H04N 9535

Patent

active

045996423

ABSTRACT:
A color television receiver with luminance and chrominance signal channels includes an automatic kinescope beam current limiter, an automatic white level drive control network, and an automatic black level bias control network. A switching network is timed to operate such that a control signal developed by the beam current limiter is coupled to the luminance channel during normal picture intervals, but is decoupled from the luminance channel during both white level drive control intervals and black level bias control intervals. The beam limiter control signal is continuously coupled to the chrominance channel, independent of the operation of the switching network, to permit chrominance output bias offset errors produced by beam limiter action to be sensed and compensated for by the automatic bias control network.

REFERENCES:
patent: 4516152 (1985-05-01), Willis
patent: 4554578 (1985-11-01), Willis
Selected Pages From a Technical Bulletin of the Semiconductor Division of ITT Corporation, titled "Digit 2000 VLSI Digital TV System."

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