Chrominance noise reduction apparatus employing two-dimensional

Details Chrominance noise reduction apparatus employing two-dimensional Chrominance noise reduction apparatus employing two-dimensional

1991-06-26

1993-08-31

Oberley, Alvin E.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 40, H04N 964

Patent

active

052413756

ABSTRACT:
Baseband chrominace components are time division multiplexed and subjected to vertical and horizontal recursive filtering thereby providing color component noise reduction in which vertical streaking characteristic of the vertical recursive filtering is effectively visually cancelled by horizontal streaking characteristic of the horizontal recursive filter thereby providing the benefits of (1) noise reduced baseband chrominance components (2) with minimal visual artifacts, (3) without requiring duplication of filtering elements whereby (4) reliability is increased and with a minimimum of filtering elements and (5) costs are proportionately reducted.

REFERENCES:
patent: 4030121 (1977-06-01), Faroudja
patent: 4246610 (1981-01-01), Takahashi
patent: 4558353 (1985-12-01), Hirota
patent: 4670775 (1987-06-01), Faroudja et al.
patent: 4888642 (1989-12-01), Kato
patent: 4928165 (1990-05-01), Kisou

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