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CPP100
SECTION 8
CPP1OPS
25/10/06
www.snellwilcox.com
Version 1 Issue 6
8.3
Pre-Processor
Recursive Filter
Motion Adaptive asymmetric temporal (frame) recursive filter.
Three set levels with maximum noise reduction of up to 12dB.
Bias adjustment ±3 allows fine control in approximately 1dB steps.
Filter ON/OFF
Y: Off, Min, Med, Max
C: Off, Min, Med, Max
Bias: -3 - +3
Threshold (Noise floor): AUTO, 1 - 15
Semi-Transversal Filter
Operates on recursive filter output.
Reduces absolute levels of noise trails in static revealed/concealed
areas e.g. after scene changes up to 4.7dB. Can only be switched on
when recursive filter is selected.
Filter ON/OFF
Median Filter
Adaptive spatial/temporal median filter.
Filter ON/OFF
Level: Min 1, Min 2, Med 3, Med 4, Max 5, Max 6
Spatial Filter
Spatial 2D median filter.
Filter ON/OFF
Y: Off, Min, Med, Max
C: Off, Min, Med, Max
Linear Filter
18 sets of linear 15 tap low pass brickwall digital filters.
6 sets of linear 15 tap extra low pass brickwall digital filters.
6 sets of peaking value for each cut-off frequency.
10 sets of Gaussian low pass filters (no peaking).
5 sets of Gaussian high pass filters.
Brickwall Low Pass Cut Off: Full Bandwidth, 4.2 - 2.5MHz (-6dB) in 0.1 MHz steps
Brickwall Extra Low Pass Cut Off 2.4 - 0.9MHz (-6dB) in 0.3 MHz steps ( no boost )
Boost: None, 1dB, 2dB, 3dB, 4.5dB, 6dB
Gaussian Low Pass: -4dB to -40dB in 4dB step
Gaussian High Pass: 1dB, 2dB, 3dB, 4.5dB, 6dB
Scratch Filter
Filters, of different strengths, for Vertical scratches, of variable contrast,
type and length.
Filter ON/OFF
Strength: Min, Med, Max
Contrast: Low, Med, High
Length: Any, Long
Type: Both, Black, White