ADV7302A_15 Datasheet, PDF (53/68 Pages) Analog Devices – Multiformat SD, Progressive Scan/HDTV Video Encoder with Six 11-Bit DACs

Appendix B
ADV7302A/ADV7303A
SD WIDE SCREEN SIGNALING
[Subaddresses 59h, 5Ah, and 5Bh]
The ADV7302A/ADV7303A supports Wide Screen Signaling
(WSS) conforming to the standard. WSS data is transmitted on
Line 23. WSS data can only be transmitted when the ADV7302A/
ADV7303A is configured in PAL Mode. The WSS data is 14 bits
long. The function of each of these bits is as shown in Table XXV.
The WSS data is preceded by a run-in sequence and a start code
(see Figure 82). If SD WSS [Address 59h, Bit 7] 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.
It is possible to blank the WSS portion of Line 23 with
Subaddress 61h, Bit 7.
Bit
0
1
2
3
4
5
6
7
8
9–10
11
12–13
Table XXV. Function of WSS Bits
Function
Aspect Ratio
Format
Position
Odd Parity Check of Bits 0–2
0 = Camera Mode
1 = Film Mode
0 = Standard Coding
1 = Motion Adaptive Color Plus
0 = No Helper
1 = Modulated Helper
Reserved
Reserved
00 = No Open Subtitles
10 = Subtitles Inside Active Image Area
01 = Subtitles Outside Active Image Area
11 = Reserved
0 = No Surround Sound Information
1 = Surround Sound Mode
Reserved
Table XXVI. Function of WSS Bits 0–3
B0 B1 B2 B3 Aspect Ratio Format
Position
0001
1000
0100
1101
0010
1011
0111
1110
4:3
14:9
14:9
16:9
16:9
>16:9
14:9
16:9
Full Format
Letterbox
Letterbox
Letterbox
Letterbox
Letterbox
Full Format
N/A
N/A
Center
Top
Center
Top
Center
Center
N/A
500mV
RUN-IN
SEQUENCE
START
CODE
W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13
ACTIVE
VIDEO
11.0␮s
38.4␮s
42.5␮s
Figure 82. WSS Waveform
REV. A
–53–