AK8859VQ Datasheet, PDF (36/73 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

[AK8859VQ]
[7.27.] ACC (Auto Color Control)
The ACC of the AK8859VQ measures the level of the input signal color burst and adjusts to the appropriate
level. The ACC is not applicable to SECAM input signal.
NTSC-M,J, NTSC-4.43, PAL-M…………………………286mV
PAL-B,D,G,H,I,N, PAL-Nc, PAL-60…………. ………… 300mV
Setting for ON/OFF of ACC
Name
Definition
ACC
[0]: ACC OFF
[1]: ACC ON
Sub Address: 0x0C [5]
The ACC and Color saturation functions operate independently. If ACC is enabled, the color saturation
adjustment is applied to the signal that has been adjusted to the appropriate level by the ACC.
[7.28.] Sharpness adjustment
Sharpness adjustment is performed on the luminance signal. The filter characteristic is shown in the
following diagram. A sharp image can be obtained by selection of the filter with the appropriate
characteristics.
SHARP
(ON/OFF)
Y signal (before)
Filter
Y signal (after)
Delay
Frequency [MHz]
Setting for sharpness adjustment
Name
Definition
SHARP
[0]: No filtering
[1]: Filter
Sub Address: 0x0C [4]
[7.29.] Color Killer
In CVBS or S-video input, the chroma signal quality of the input signal is determined by comparison of its
color burst level against the threshold setting in the color killer control register. If the level is below the
threshold, the color killer is activated, resulting in processing of the input as a monochrome signal and thus
with CbCr data fixed at 0x80.
Setting for color killer (Enable/Disable) activation
Name
Definition
CKILLDIS
[0]: Enable
[1]: Disable
Sub Address: 0x0C [7]
MS1178-E-00
AKM Confidential
- 36 -
2010/04