SDA9400 Datasheet, PDF (24/94 Pages) Micronas – Scan Rate Converter using Embedded DRAM Technology Units

SDA 9400
Block diagram of spatial noise reduction
SNRON
YIN
LM
LM
0
LP
1
Edge
detection
YSNR
LM
UVIN
LM
1
LP
0
1
LP
0
UVSNR
VCSNRON
HCSNRON
Input write parameter
Parameter
SNRON
1: on
0: off
VCSNRON
1: on
0: off
HCSNRON
1: on
0: off
Subaddress
Description
1Dh
Spatial noise reduction of luminance signal
1Dh
Vertical spatial noise reduction of chrominance
1Dh
Horizontal spatial noise reduction of chrominance
In case of VDECON>0 or HDECON>0 or MULTIPIC>0 (see also Vertical compression on page 18,
see also Horizontal compression on page 19, see also Multipicture display on page 20) spatial
noise reduction is not possible.
6.3.4.2 Motion adaptive temporal noise reduction
The equation below describes the behaviour of the temporal adaptive noise reduction filter. The
same equation is valid for the chrominance signal. Depending on the motion in the input signal, the
K-factor Ky (Kuv) can be adjusted between 0 (no motion) and 15 (motion) by the motion detector.
The K-factor for the chrominance filter can be either Ky (output of the luminance motion detector,
TNRSEL=0) or Kuv (output of the chrominance motion detector, TNRSEL=1). For the luminance
Micronas
24
Preliminary Data Sheet