Vertical transition processor for a comb filter

Details Vertical transition processor for a comb filter Vertical transition processor for a comb filter

1985-10-01

1987-09-15

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 37, 358 36, 358 21R, H04N 964

Patent

active

046943315

ABSTRACT:
A vertical transition processor for a comb filter detects the presence of a complementary-color vertical transition. A detector is provided for detecting if the color subcarrier on adjacent lines has the same phase angle and amplitude. This indicates the presence of a complementary-color vertical transition. If a complementary-color vertical transition is detected, then the comb filtered luminance and chrominance signals are selectively coupled to the luminance and chrominance processing channels so that the chrominance processing channel receives primarily color information and the color information is excluded from the luminance processing channel. This counteracts the adverse effects of the complementary-color vertical transition.

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