Method for the additive and multiplicative spurious signal compe

Details Method for the additive and multiplicative spurious signal compe Method for the additive and multiplicative spurious signal compe

1979-09-17

1980-12-16

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, 358163, 358167, H04N 9535, H04N 534

Patent

active

042401038

ABSTRACT:
A method and a circuit for the additive and multiplicative spurious signal compensation of a video signal are proposed. For additive spurious signal compensation, a signal is derived from the "black level" signal, stored, read-out in synchronism with the video signal to be corrected and the thus formed correction signal is subtracted from the video signal. For multiplicative spurious signal compensation, a signal is derived from the "white level" signal, its reciprocal value is formed, stored, read-out in synchronism with the video signal to be corrected and the thus formed correction signal is multiplied with the video signal. A three channel system for color television signals is disclosed.

REFERENCES:
patent: 3790705 (1974-02-01), Kamin
patent: 3800078 (1974-03-01), Cochran et al.
patent: 3919473 (1975-11-01), Cotter

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