AK8851 Datasheet, PDF (67/80 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

ASAHI KASEI
[AK8851]
Image Control Register (R/W) [Sub Address 0x10]
Register to control sharpness of image.
For sharpness and softness filter characteristics and Luminance band-limiting filter characteristics, please refer to the
corresponding sections of this data sheet.
Sub Address 0x10
bit 7
bit 6
VBIIMGCTL
SEPIA
0
0
bit 5
LUMFIL1
0
bit 4
bit 3
LUMFIL0 SHCORE1
Default Value
0
0
bit 2
SHCORE0
0
Default Value : 0x00
bit 1
bit 0
SHARP1
SHARP0
0
0
Image Control Register Definition
BIT Register Name
bit 0 SHARP0
~
~
Sharpness Control
bit 1 SHARP1
bit 2 SHCORE0
~
~
Sharpness Coring
bit 3 SHCORE1
bit 4 LUMFIL0
~
~
Luminance Filter
bit 5 LUMFIL1
bit 6
SEPIA
Sepia output
bit 7 VBIIMGCTL VBI Image Control
R/W Definition
Sharpness control bits
[SHARP1SHARP0]-bit
00 : No sharpness filter
R/W _{01 : Sharpness effect is min.}
10 : Sharpness effect is middle
11 : Sharpness effect is max.
Coring level of Sharpness filter is set with these bit
[SHCORE1:SHCORE0]-bit
R/W ^{00 : No Coring}
01 : +/- 1LSB
10 : +/- 2LSB
11 : +/- 3LSB
Luminance limiting bandwidth
[LUMFIL1:LUMFIL0]-bit
R/W
00 : No limitation for Luminance bandwidth
01 : narrow
10 : mid.
11 : wide
Sepia Output
R/W 0 :
1 : Sepia output on
On/Off control bit for Brightness and Contrast
adjustment inside the VBI interval.
R/W
0 : Brightness and Contrast adjustment is invalid
inside VBI interval.
1 : Brightness and Contrast adjustment is invalid
inside VBI interval
MS0244-E-03
67
Confidential
2005 / 07