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CPP100
SECTION 9
CPP1OPS
25/10/06
www.snellwilcox.com
Version 1 Issue 6
9.20
Enhancer cont.
Chrominance De-enhancement
A diagram of the chrominance de-enhancer is shown below
The first stage is a seven point vertical temporal filter. As well as attenuating high frequency diagonals the
multi-tap filter also suppresses cross-colour (originating from composite luminance and chrominance
separation) and other non-correlated temporal noise.
Chrominance de-enhancement is applied at all horizontal frequencies.
LUT
delay
Vertical
temporal
filter
page select
centre tap
taps