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參數資料
型號: ADV7170
廠商: Analog Devices, Inc.
英文描述: Digital PAL/NTSC Video Encoder with 10-Bit SSAF⑩ and Advanced Power Management
中文描述: 數碼PAL / NTSC視頻編碼器與10位SSAF⑩和高級電源管理
文件頁數: 34/55頁
文件大?。?/td> 754K
代理商: ADV7170
ADV7170/ADV7171
–34–
REV. 0
APPENDIX 4
WIDE SCREEN SIGNALING
The ADV7170/ADV7171 supports Wide Screen Signalling (WSS) conforming to the standard. WSS data is transmitted on Line 23.
WSS data can only be transmitted when the ADV7170/ADV7171 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 58).
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 transmitted on Line 23. The latter portion of Line
23 (42.5
μ
s from the falling edge of
HSYNC
) is available for the insertion of video.
Function of CGMS Bits
Bit 0–Bit 2
Aspect Ratio/Format/Position
Bit 3 is odd parity check of Bit 0–Bit 2
B0 B1 B2 B3
Aspect Ratio
Format
Position
0
0
0
1
4:3
Full Format
Nonapplicable
1
0
0
0
14:9
Letterbox
Center
0
1
0
0
14:9
Letterbox
Top
1
1
0
1
16:9
Letterbox
Center
0
0
1
0
16:9
Letterbox
Top
1
0
1
1
>16:9
Letterbox
Center
0
1
1
1
14:9
Full Format
Center
1
1
1
0
16:9
Nonapplicable
Nonapplicable
11.0
m
s
W0
W1
W2
W3
W4
W5
W6 W7
W8
W9 W10 W11 W12 W13
500mV
RUN-IN
SEQUENCE
START
CODE
ACTIVE
VIDEO
38.4
m
s
42.5
m
s
Figure 58. WSS Waveform Diagram
B4
0
1
B5
0
1
B6
0
1
B7
Camera Mode
Film Mode
Standard Coding
Motion Adaptive Color Plus
No Helper
Modulated Helper
RESERVED
B9
0
1
0
1
B11
0
1
B12
B13
B10
0
0
1
1
No Open Subtitles
Subtitles In Active Image Area
Subtitles Out of Active Image Area
Reserved
No Surround Sound Information
Surround Sound Mode
RESERVED
RESERVED
相關PDF資料
PDF描述
ADV7170KS Digital PAL/NTSC Video Encoder with 10-Bit SSAF⑩ and Advanced Power Management
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ADV7171SU Digital PAL/NTSC Video Encoder with 10-Bit SSAF⑩ and Advanced Power Management
ADV7171* Digital PAL/NTSC Video Encoder with 10-Bit SSAF and Advanced Power Management
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