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ADV7342 数据表(PDF) 72 Page - Analog Devices

部件名 ADV7342
功能描述  Multiformat Video Encoder Six, 11-Bit, 297 MHz DACs
PDF  88 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADV7342 数据表(HTML) 72 Page - Analog Devices

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ADV7342/ADV7343
Rev. 0 | Page 72 of 88
APPENDIX 2—SD WIDE SCREEN SIGNALING
Subaddress 0x99, Subaddress 0x9A, Subaddress 0x9B
The ADV7342/ADV7343 support wide screen signaling (WSS)
conforming to the ETSI 300 294 standard. WSS data is
transmitted on Line 23. WSS data can be transmitted only when
the device is configured in PAL mode. The WSS data is 14 bits
long. The function of each of these bits is shown in Table 55.
The WSS data is preceded by a run-in sequence and a start code
(see Figure 98). The latter portion of Line 23 (after 42.5 μs from
the falling edge of HSYNC) is available for the insertion of
video. WSS data transmission on Line 23 can be enabled using
Subaddress 0x99, Bit 7. It is possible to blank the WSS portion
of Line 23 with Subaddress 0xA1, Bit 7.
Table 55. Function of WSS
Bit Number
Bit Description
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Setting
1
0
0
0
4:3, full format, N/A
0
0
0
1
14:9, letterbox, center
0
0
1
0
14:9, letterbox, top
1
0
1
1
16:9, letterbox, center
0
1
0
0
16:9, letterbox, top
1
1
0
1
>16:9, letterbox, center
1
1
1
0
14:9, full format, center
Aspect Ratio, Format, Position
0
1
1
1
16:0, N/A, N/A
0
Camera mode
Mode
1
Film mode
0
Normal PAL
Color Encoding
1
Motion Adaptive ColorPlus
0
Not present
Helper Signals
1
Present
Reserved
0
0
No
Teletext Subtitles
1
Yes
0
0
No
0
1
Subtitles in active image area
1
0
Subtitles out of active image area
Open Subtitles
1
1
Reserved
0
No
Surround Sound
1
Yes
0
No copyright asserted or unknown
Copyright
1
Copyright asserted
0
Copying not restricted
Copy Protection
1
Copying restricted
ACTIVE
VIDEO
RUN-IN
SEQUENCE
START
CODE
500mV
11.0µs
38.4µs
42.5µs
W0
W1
W2
W3
W4
W5
W6
W7
W8
W9 W10 W11 W12 W13
Figure 98. WSS Waveform Diagram



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