AK8857VQ Datasheet, PDF (65/105 Pages) Asahi Kasei Microsystems – Dual Channel Digital Video Decoder

[AK8857VQ]
4. Hue adjustment
HUE[7:0]-bits: For hue adjustment; settings in 2’s complement; default value 0x00 (no adjustment)
The AK8854 can perform hue rotation with a phase rotation range of ±45° in steps of about 0.35°.
5. Sharpness adjustment
Sharpness adjustment is performed on the luminance signal as shown in the following process
diagram. The filter characteristics and the coring level can be selected by following register. A
sharp image can be obtained by selection of the filter with the appropriate characteristics.
SHARP[1:0]-bits
SHCORE[1:0]-bits
Luminance signal
before processing
Filter
Coring
Luminance signal
after processing
Delay
○SHARP[1:0]-bit: Settings for filter characteristics selection
SHARP[1:0]-bit
Filter characteristics
[00]
No filtering
[01]
Min
[10]
Middle
[11]
Max
Notes
Filter disabled
○SHCORE[1:0]-bit : Settings for coring level after sharpness filtering
SHCORE[1:0]-bit
Coring level (LSB)
Notes
[00]
No coring
[01]
±1LSB
Settings apply only to
[10]
±2LSB
filtered signal.
[11]
±3LSB
○VBIIMGCTL-bit: Settings for brightness and contrast adjustment status (ON/OFF) during VBI
VBIIMGCTL -bit
Status during VBI
Notes
[0]
Disable
[1]
Enable
MS1189-E-01
-65-
2010/12