Comb filter arrangement having delay time compensation and load

Details Comb filter arrangement having delay time compensation and load Comb filter arrangement having delay time compensation and load

1992-02-19

1993-06-01

Powell, Mark R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 978

Patent

active

052164950

ABSTRACT:
For a comb filter arrangement, for example, for separating a color picture signal into a modulated chrominance subcarrier and a luminance signal, while generating two comb filter function, a one-stage median filter (21) is provided in which the amplitudes of the simultaneously available signals of three picture lines and the two comb filter functions are compared with each other in a comparator stage which supplies logical comparison signals to a selection logic (30) in dependence upon the comparison results. The selection logic (30) constantly determines the signal having the middle instantaneous amplitude of the signals applied to the comparator stage on the basis of the comparison signals, and applies this signal to the medium filter output.

REFERENCES:
patent: 4920408 (1990-04-01), Umezawa
patent: 4980737 (1990-12-01), Umezawa

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