AK8858 Datasheet, PDF (55/96 Pages) Asahi Kasei Microsystems – PS/SD Multi Format Video Decoder

[AK8858]
[7.29.3] Color saturation adjustment
In composite (CVBS) or S-Video signals mode, saturation adjustment involves multiplication of the color signal
by the gain factor setting in this register. The calculated result is U/V demodulated.
In YPbPr mode, U and V value can be adjusted indivisually.
Sub Address: 0x15 [7:0]
Name
Definition
[composite (CVBS) or S-Video signals]
COUT = (SAT / 128) X CIN
COUT: C signal after calculation
CIN: C signal before calculation
SAT: Satulation factor (register setting value)
SAT0 UTONE0
~
~
SAT7 UTONE7
[Component video signal]
UOUT = (UTONE / 128) X UIN
UOUT: U signal after calculation
UIN: U signal before calculation
UTONE: Satulation factor (register setting value)
The gain factor can be set in the range 0 to 255/128, in steps of 1/128.
The default value is 0x80.
Name
VTONE0
~
VTONE7
Definition
[Component video signal]
VOUT = (VTONE / 128) X VIN
VOUT: V signal after calculation
VIN: V signal before calculation
VTONE: Satulation factor (register setting value)
Sub Address: 0x16 [7:0]
The gain factor can be set in the range 0 to 255/128, in steps of 1/128.
The default value is 0x80.
(Notice)
If component mode, UTONE and VTONE default value should be changed to following parameter.
UTONE [7:0] =0x70
VTONE [7:0] =0x9D
[7.29.4] HUE adjustment
Setting for HUE adjustment
Sub Address: 0x17 [7:0]
Name Definition
HUE0
~
HUE 7
The phase rotation can be set in the range of ±45° in 1/256step (about 0.35step).
The setting is in 2’s complement.
HUE adjustment only valid for composite (CVBS) and S-Video signals input.
MS1230-E-00
- 55 -
2010/9