SDA9401 Datasheet, PDF (22/69 Pages) List of Unclassifed Manufacturers – Scan Rate Converter using Embedded DRAM Technology Units

SDA 9401
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 chapter Vertical compression on
page 16, see also chapter Horizontal compression on page 17, see also chapter Multipicture
display on page 18) 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).
Micronas
22
Preliminary Data Sheet