ADV7341BSTZ Analog Devices Inc, ADV7341BSTZ Datasheet - Page 59

• Manufacturer Part Number: ADV7341BSTZ
• Manufacturer: Analog Devices Inc

Specifications of ADV7341BSTZ

• Number Of Dac's: 6
• Adc/dac Resolution: 12b
• Screening Level: Industrial
• Package Type: LQFP
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

Table 46. Sample Color Values for EIA 770.2/EIA770.3
ED/HD Output Standard Selection
Sample Color
White
Black
Red
Green
Blue
Yellow
Cyan
Magenta
COLOR SPACE CONVERSION MATRIX
Subaddress 0x03 to Subaddress 0x09
The internal color space conversion (CSC) matrix automatically
performs all color space conversions based on the input mode
programmed in the mode select register (Subaddress 0x01,
Bits[6:4]). Table 47 and Table 48 show the options available in
this matrix.
An SD color space conversion from RGB-in to YPrPb-out is
possible. An ED/HD color space conversion from RGB-in to
YPrPb-out is not possible.
Table 47. SD Color Space Conversion Options
Input
YCrCb
YCrCb
RGB
RGB
1
Table 48. ED/HD Color Space Conversion Options
Input
YCrCb
YCrCb
RGB
SD Manual CSC Matrix Adjust Feature
The SD manual CSC matrix adjust feature provides custom
coefficient manipulation for RGB to YPbPr conversion (for
YPbPr to RGB conversion, this matrix adjustment is not
available).
Normally, there is no need to modify the SD matrix coefficients
because the CSC matrix automatically performs the color space
conversion based on the output color space selected (see Table 47).
Note that Bit 7 in Subaddress 0x87 must be set to enable RGB
input and, therefore, use the CSC manual adjustment.
CVBS/YC outputs are available for all CSC combinations.
Output
YPrPb
RGB
YPrPb
RGB
Output
YPrPb
RGB
RGB
1
Y Value
235
16
81
145
41
210
170
106
YPrPb/RGB Out
(Subaddress 0x02,
Bit 5)
1
0
0
YPrPb/RGB Out
(Subaddress 0x02,
Bit 5)
1
0
1
0
(0xEB)
(0x10)
(0x51)
(0x91)
(0x29)
(0xD2)
(0xAA)
(0x6A)
Cr Value
128
128
240
34
110
146
16
222
(0x80)
(0x80)
(0xF0)
(0x22)
(0x6E)
(0x92)
(0x10)
(0xDE)
RGB In/YCrCb In
(Subaddress 0x35,
Bit 1)
0
0
1
RGB In/YCrCb In
(Subaddress 0x87,
Bit 7)
0
0
1
1
Cb Value
128
128
90
54
240
16
166
202
(0x80)
(0x80)
(0x5A)
(0x36)
(0xF0)
(0x10)
(0xA6)
(0xCA)
Rev. A | Page 59 of 108
The SD CSC matrix scalar uses the following equations:
The coefficients and their default values and register locations
are shown in Table 49.
Table 49. SD Manual CSC Matrix Default Values
Coefficient
a1
a2
a3
a4
b1
b2
b3
b4
c1
c2
c3
c4
ED/HD Manual CSC Matrix Adjust Feature
The ED/HD manual CSC matrix adjust feature provides custom
coefficient manipulation for color space conversions and is used
in ED and HD modes only. The ED/HD manual CSC matrix
adjust feature can be enabled using Subaddress 0x02, Bit 3.
Normally, there is no need to enable this feature because the CSC
matrix automatically performs the color space conversion based
on the input mode chosen (ED or HD) and the input and output
color spaces selected (see Table 48). For this reason, the ED/HD
manual CSC matrix adjust feature is disabled by default.
If RGB output is selected, the ED/HD CSC matrix scalar uses
the following equations:
Note that subtractions are implemented in hardware.
If YPrPb output is selected, the following equations are used:
where:
GY = Subaddress 0x05, Bits[7:0] and Subaddress 0x03, Bits[1:0].
GU = Subaddress 0x06, Bits[7:0] and Subaddress 0x04, Bits[7:6].
GV = Subaddress 0x07, Bits[7:0] and Subaddress 0x04, Bits[5:4].
BU = Subaddress 0x08, Bits[7:0] and Subaddress 0x04, Bits[3:2].
RV = Subaddress 0x09, Bits[7:0] and Subaddress 0x04, Bits[1:0].
Y = ( a1 × R) + ( a2 × G) + ( a3 × B) + a4
Pr = ( b1 × R) + ( b2 × G) + ( b3 × B) + b4
Pb = ( c1 × R) + (c 2 × G) + (c 3 × B) + c 4
R = GY × Y + RV × Pr
G = GY × Y − ( GU × Pb) − ( GV × Pr)
B = GY × Y + BU × Pb
Y = GY × Y
Pr = RV × Pr
Pb = BU × Pb
Subaddress
0xBD
0xBE
0xBF
0xC0
0xC1
0xC2
0xC3
0xC4
0xC5
0xC6
0xC7
0xC8
ADV7340/ADV7341
Default
0x42
0x81
0x19
0x10
0x70
0x5E
0x12
0x80
0x26
0x4A
0x70
0x80