adv7322 Analog Devices, Inc., adv7322 Datasheet - Page 50

• Manufacturer Part Number: adv7322
• Description: Multiformat 11-bit Hdtv Video Encoder
• Manufacturer: Analog Devices, Inc.

ADV7322
PS/HD Sinc Filter
[Subaddress 0x13, Bit 3]
COLOR CONTROLS AND RGB MATRIX
HD Y Level, HD Cr Level, HD Cb Level
[Subaddresses 0x16 to 0x18]
Three 8-bit registers at Addresses 0x16, 0x17, and 0x18 are used
to program the output color of the internal HD test pattern
generator, be it the lines of the cross hatch pattern or the
uniform field test pattern. They are not functional as color
controls on external pixel data input. For this purpose the RGB
matrix is used.
The standard used for the values for Y and the color difference
signals to obtain white, black, and the saturated primary and
complementary colors conforms to the ITU-R BT.601-4 standard.
Table 29 shows sample color values to be programmed into the
color registers when Output Standard Selection is set to EIA 770.2.
–0.1
–0.2
–0.3
–0.4
–0.5
–0.1
–0.2
–0.3
–0.4
–0.5
0.5
0.4
0.3
0.2
0.1
0.5
0.4
0.3
0.2
0.1
0
0
0
0
5
5
Figure 67. HD Sinc Filter Disabled
Figure 66. HD Sinc Filter Enabled
10
10
FREQUENCY (MHz)
FREQUENCY (MHz)
15
15
20
20
25
25
30
30
Rev. PrA | Page 50 of 88
Table 29. Sample Color Values for EIA 770.2
Output Standard Selection
Sample Color
White
Black
Red
Green
Blue
Yellow
Cyan
Magenta
RGB Matrix
[Subaddresses 0x03 to 0x09]
The internal RGB matrix automatically takes care of all YCrCb
to RGB scaling according to the input standard programmed in
the device as selected by input mode Register 0x01 [6:4]. Table 30
shows the options available in this Matrix.
Note that it is not possible to do a color space conversion from
RGB-in to YPrPb-out. Also, it is not possible to input SD RGB.
Table 30. Matrix Conversion Options
YCrCb
YCrCb
RGB
Manual RGB Matrix Adjust Feature
Normally, there is no need to enable this feature in Register
0x02, Bit 3, because the RGB Matrix automatically takes care of
color space conversion depending on the input mode chosen
(SD/PS,HD) and the polarity of RGB/YPrPb output in Register
0x02, Bit 5 (see Table 30). For this reason, manual RGB matrix
adjust feature is turned off by default.
The Manual RGB matrix adjust feature is used in progressive
scan and high definition modes only and is used for custom
coefficient manipulation.
When the manual RGB matrix adjust feature is enabled, the
default values in Registers 0x05 to 0x09 are correct for HDTV
color space only. The color components are converted according
to the 1080i and 720p standards [SMPTE 274M, SMPTE
296M]:
Input
R = Y + 1.575 Pr
G = Y − 0.468 Pr − 0.187 Pb
B = Y + 1.855 Pb
Output
YPrPb
RGB
RGB
HDTV/SD/PS
Reg 0x02,Bit 5
(YUV/RGB OUT)
1
0
0
Y Value
235 (EB)
16 (10)
81 (51)
145 (91)
41 (29)
210 (D2)
170 (AA)
106 (6A)
Preliminary Technical Data
Cr Value
128 (80)
128 (80)
240 (F0)
34 (22)
110 (6E)
146 (92)
16 (10)
222 (DE)
Reg 0x15, Bit 1
(RGB IN/YCrCb IN,
PS/HD Only)
0
0
1
Cb Value
128 (80)
128 (80)
90 (5A)
54 (36)
240 (F0)
16 (10)
166 (A6)
202 (CA)