AK8858 Datasheet, PDF (38/96 Pages) Asahi Kasei Microsystems – PS/SD Multi Format Video Decoder

[AK8858]
[7.18] ACC (Auto Color Control)
The ACC of the AK8858 measures the level of the input signal color burst and adjusts to the appropriate level.
The ACC is not applicable to SECAM, and YPbPr input signals.
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.
Settings for ACC time constant
ACCT[1:0]-bit
00
01
10
11
Time constant
Disable
Fast
Middle
Slow
Sub Address: 0x0A [6:5]
Notes
ACC OFF
T= 2Fields
T= 8Fields
T= 30Fields
Settings for freezing ACC function
ACCFRZ-bit
0
1
ACC status
Non-frozen
Frozen
Sub Address: 0x0A [7]
Notes
[7.19] Y/C separation
The adaptive two-dimensional Y/C separation of the AK8858 utilizes a co-relation detector to select the
best-correlated direction from among vertical, horizontal, and diagonal samples, and selects the optimum Y/C
separation mode.
For NTSC-4.43, PAL-60, and SECAM inputs, the Y/C separation is one-dimensional only, regardless of the
setting.
Setting for Y/C separation
Name
Setting Value
[00]
YCSEP0
[01]
~
YCSEP1
[10]
[11]
YC separation mode
Adaptive
1-D
2-D
Reserved
Notes
Sub Address: 0x0C [1:0]
1-D (BPF)
(NTSC-M,J, PAL-M): 3 Line 2-D
(PAL-B,D,G,H,I,N,Nc): 5 Line 2-D
MS1230-E-00
- 38 -
2010/9