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參數資料
| 型號： | ADV7344 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat Video Encoder Six 14-Bit Noise Shaped Video DACs |
| 中文描述： | 多格式視頻編碼器6 14位噪聲整形視頻DAC |
| 文件頁數： | 72/88頁 |
| 文件大小： | 1078K |
| 代理商： | ADV7344 |
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ADV7344
APPENDIX 2—SD WIDE SCREEN SIGNALING
Subaddress 0x99, Subaddress 0x9A, Subaddress 0x9B
The ADV7344 supports 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.
Rev. 0 | Page 72 of 88
The WSS data is preceded by a run-in sequence and a start code
(see Figure 98). If SD WSS (Subaddress 0x99, Bit 7) is set to
Logic 1, it enables the WSS data to be transmitted on Line 23.
The latter portion of Line 23 (42.5 sec 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 0xA1, Bit 7.
Table 55. Function of WSS
Bit Description
Aspect Ratio, Format, Position
Bit Number
8
7
0
0
1
Setting
4:3, full format, N/A
14:9, letterbox, center
14:9, letterbox, top
16:9, letterbox, center
16:9, letterbox, top
>16:9, letterbox, center
14:9, full format, center
16:0, N/A, N/A
Camera mode
Film mode
Normal PAL
Motion Adaptive ColorPlus
Not present
Present
No
Yes
No
Subtitles in active image area
Subtitles out of active image area
Reserved
No
Yes
No copyright asserted or unknown
Copyright asserted
Copying not restricted
Copying restricted
13
0
1
12
0
1
11
0
1
10
0
0
1
1
9
0
1
0
1
6
0
1
5
0
1
4
0
1
3
1
0
0
1
0
1
1
0
2
0
0
0
0
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
Mode
Color Encoding
Helper Signals
Reserved
Teletext Subtitles
Open Subtitles
Surround Sound
Copyright
Copy Protection
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
0
Figure 98. WSS Waveform Diagram
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