Manual Color Space Conversion Matrix; Figure 77: Single Csc Channel; Table 49: Csc Configuration For All Csc Modes Reported By Csc_Coeff_Sel_Rb - Analog Devices ADV7850 Hardware Manual

Function
csc_coeff_sel_rb[3:0]
0000 
0001
0011
0101
0111
1001
1010
1111
xxxx
CSC
A1
Mode
CSC in bypass mode. In this mode the CSC effectively performs a color conversion based on the CSC coefficients set in registers csc_scale, A1,
0b0000
A2, A3, A4, B1, B2, B3, B4, C1, C2, C3, and C4.
0b0001 0b01 0x0800
0b0011 0b01 0x0800
0b0101 0b00 0x0964
0b0111 0b00 0x0B71
0b1001 0b01 0x0800
0b1010 0b01 0x0800

Manual Color Space Conversion Matrix

8.3.4
The CP CSC matrix in the ADV7850 is a 3 x 3 matrix with full programmability of all coefficients in the matrix in manual mode. Each
coefficient is 12-bits wide to ensure signal integrity is maintained in the CP CSC section. The CP CSC contains three identical processing
channels, one of which is shown in Figure 77.
The main inputs labeled In_A, In_B, and In_C can come from each ADC. Each input to the individual channels to the CP CSC is
multiplied by a separate coefficient for each channel.
In Figure 77, these coefficients are marked A1, A2 and A3. The variable labeled A4 is used as an offset control for channel A in the CSC.
There is also a further CP CSC control, csc_scale[1:0], which can be used to accommodate coefficients that extend the supported range.
The functional diagram for a single channel in the CP CSC, as shown in
C. The coefficients for these channels are called B1, B2, B3, B4, C1, C2, C3 and C4.
The coefficients mentioned previously are detailed in
Rev. A May 2012
Description
CSC bypassed
YPbPr 601 to RGB
YPbPr 709 to RGB
RGB to YPbPr 601
RGB to YPbPr 709
YPbPr 709 to YPbPr 601
YPbPr 601 to YPbPr 709
CSC in manual mode
Reserved

Table 49: CSC Configuration for All CSC Modes Reported by csc_coeff_sel_rb

A2 A3 A4
0x1A6A 0x1D50 0x0423
0x1C54 0x1E89 0x0291
0x04C9 0x01D3 0x0000
0x0368 0x0127 0x0000
0x0188 0x00CB 0x1ED7
0x1E56 0x1F14 0x014A
A1[12:0]
In_A [11:0] X +
A2[12:0]
In_B [11:0] X
A3[12:0]
In_C [11:0] X

Figure 77: Single CSC Channel

Table 50
B1 B2 B3
0x0800 0x0AF8 0x0000
0x0800 0x0C52 0x0000
0x1927 0x082D 0x1EAC
0x1893 0x082D 0x1F3F
0x0000 0x07DE 0x1F6C
0x0000 0x0834 0x009A
Figure 77, is repeated for the other two remaining channels B and
CSC_scale
A4[12:0]
X 2
+ +
along with the default values for these coefficients.
233
B4 C1 C2
0x1A84 0x0800 0x0000
0x19D7 0x0800 0x0000
0x0800 0x1A93 0x1D3F
0x0800 0x19B2 0x1E21
0x005B 0x0000 0x1F1D
0x1F9A 0x0000 0x00EB
1
Out_A [11:0]
0
ADV7850
C3 C4
0x0DDB 0x1912
0x0E87 0x18BC
0x082D 0x0800
0x082D 0x0800
0x07EB 0x007B
0x0826 0x1F78