Color noise slice method and circuit for an image pickup device

Details Color noise slice method and circuit for an image pickup device Color noise slice method and circuit for an image pickup device

1997-04-01

1999-05-18

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348242, 348 30, 348624, 348698, H04N5/217;9/64;5/21;5/16

Patent

active

059055316

ABSTRACT:
The object of the present invention is to provide a color noise slice circuit in which the color noise slice process does not cause changes in hue. The color noise slice circuit of the present invention is provided with a divider that receives color-difference signals (R-Y) and (B-Y) and calculates (R-Y)/(B-Y), a memory that stores values for .theta.=tan.sup.-1 slice width setting circuit that sets the slice width .DELTA.S, multipliers that calculate .DELTA.Sr=.DELTA.S* sin .theta. and .DELTA.Sb=.DELTA.S * cos .theta., and slice circuits that execute color noise slice processing of color-difference signals (R-Y) and (B-Y) using .DELTA.Sr and .DELTA.Sb, respectively, as color noise slice widths.

REFERENCES:
patent: 4953011 (1990-08-01), Mori et al.
patent: 5264944 (1993-11-01), Takemura
patent: 5654765 (1997-08-01), Kim
LSI Kid Demosystem (MV-DS6A), System Section, Application Note, pp. 49-50, published by Hitachi Corp.

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