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ADV7341 Arkusz danych(PDF) 80 Page - Analog Devices

Numer części ADV7341
Szczegółowy opis  Multiformat Video Encoder, Six 12-Bit Noise Shaped Video DACS
PDF  108 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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ADV7341 Arkusz danych(HTML) 80 Page - Analog Devices

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ADV7340/ADV7341
Data Sheet
Rev. C | Page 80 of 108
SD WIDE SCREEN SIGNALING
Subaddress 0x99, Subaddress 0x9A, Subaddress 0x9B
The ADV7340/ADV7341 support wide screen signaling (WSS)
conforming to the ETSI 300 294 standard. WSS data is trans-
mitted 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 60. The
WSS data is preceded by a run-in sequence and a start code (see
Figure 97). 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 60. Function of WSS
Bit Number
Bit Description
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Setting
Aspect Ratio, Format, Position
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
0
1
1
1
16:0, N/A, N/A
Mode
0
Camera mode
1
Film mode
Color Encoding
0
Normal PAL
1
Motion Adaptive ColorPlus
Helper Signals
0
Not present
1
Present
Reserved
0
N/A
Teletext Subtitles
0
No
1
Yes
Open Subtitles
0
0
No
0
1
Subtitles in active image area
1
0
Subtitles out of active image area
1
1
Reserved
Surround Sound
0
No
1
Yes
Copyright
0
No copyright asserted or unknown
1
Copyright asserted
Copy Protection
0
Copying not restricted
1
Copying restricted
Figure 97. WSS Waveform Diagram
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



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