Method and apparatus for generating an adaptive peaking signal i

Details Method and apparatus for generating an adaptive peaking signal i Method and apparatus for generating an adaptive peaking signal i

1988-03-04

1989-01-31

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358162, 358169, H04N 514

Patent

active

048020109

ABSTRACT:
A conventional peaking signal derived by delaying the incoming video or luminance signal first by one horizontal line delay and then by a second horizontal line delay is modified by multiplication with an adaptive factor. The adaptive factor is derived by first taking the difference between the incoming signal and the twice delayed signal, then deriving the magnitude or the square of this difference and multiplying this by a factor K empirically derived for the particular display device. The resultant signal is then subtracted from unity. This yields the factor by which the conventional peaking signal is multiplied. The conventional signal multiplied by this factor constitutes the final peaking signal which is added to the 1H delayed luminance signal to yield the desired peaked luminance signal.

REFERENCES:
patent: 4080627 (1978-03-01), Wheeler
patent: 4263616 (1981-04-01), Lee
patent: 4571620 (1986-02-01), Anderson

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