adv7194 Analog Devices, Inc., adv7194 Datasheet - Page 49

• Manufacturer Part Number: adv7194
• Description: Professional Extended-10? Video Encoder With 54 Mhz Oversampling
• Manufacturer: Analog Devices, Inc.

The ADV7194 supports Wide Screen Signalling (WSS) conform-
ing to the standard. WSS data is transmitted on Line 23. WSS
data can only be transmitted when the ADV7194 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 97. 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 transmitted 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 Format
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
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
ADV7194