ADV7191 Analog Devices, ADV7191 Datasheet - Page 48

• Manufacturer Part Number: ADV7191
• Description: Video Encoder with Six 10-Bit DACs and Video Encoder with Six DAC Outputs
• Manufacturer: Analog Devices

ADV7190/ADV7191
The ADV7190/ADV7191 supports Wide Screen Signaling (WSS)
conforming to the standard. WSS data is transmitted on Line 23.
WSS data can only be transmitted when the ADV7190/ADV7191
is configured in PAL mode. The WSS data is 14-bits long, the
function of each of these bits is as shown below. The WSS data
is preceded by a run-in sequence and a Start Code, see Figure 91.
The bits are output from the configuration registers in the
following order: C/W20 = W0, C/W21 = W1, C/W22 = W2,
C/W23 = W3, C/W24 = W4, C/W25 = W5, C/W26 = W6,
C/W27 = W7, C/W10 = W8, C/W11 = W9, C/W12 = W10,
C/W13 = W11, C/W14 = W12, C/W15 = W13. If the bit
C/W07 is set to a Logic 1, it enables the WSS data to be trans-
mitted on Line 23. The latter portion of Line 23 (42.5 µs from
the falling edge of HSYNC) is available for the insertion of video.
Function of CGMS Bits
Bit 0–Bit 2
Bit 3
B0, B1, B2,
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
500mV
0
0
0
0
1
1
1
1
Aspect Ratio/Format/Position
Is Odd Parity Check of Bit 0–Bit 2
B3
1
0
0
1
0
1
1
0
11.0 s
Aspect
Ratio
4:3
14:9
14:9
16:9
16:9
>16:9
14:9
16:9
SEQUENCE
Format
Full Format
Letterbox
Letterbox
Letterbox
Letterbox
Letterbox
Full Format
Nonapplicable Nonapplicable
RUN-IN
START
CODE
Position
Nonapplicable
Center
Top
Center
Top
Center
Center
WIDE SCREEN SIGNALING
42.5 s
38.4 s
W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13
APPENDIX 4
B4
0
1
B5
0
1
B6
0
1
B7
B9
0
1
0
1
B11
0
1
B12 RESERVED
B13 RESERVED
Camera Mode
Film Mode
Standard Coding
Motion Adaptive Color Plus
No Helper
Modulated Helper
RESERVED
B10
0
0
1
1
No Surround Sound Information
Surround Sound Mode
No Open Subtitles
Subtitles in Active Image Area
Subtitles Out of Active Image Area
RESERVED
ACTIVE
VIDEO