參數(shù)資料
型號: EVAL-ADV7173EBZ
廠商: Analog Devices Inc
文件頁數(shù): 40/60頁
文件大?。?/td> 0K
描述: BOARD EVALUATION FOR ADV7173
標準包裝: 1
系列: Advantiv®
主要目的: 視頻,視頻處理
嵌入式:
已用 IC / 零件: ADV7173
主要屬性: NTSC/PAL 數(shù)字視頻編碼器
次要屬性: I²C 接口
已供物品:
REV. B
ADV7172/ADV7173
–45–
APPENDIX 4
WIDE SCREEN SIGNALING
The ADV7172/ADV7173 supports Wide Screen Signaling (WSS) conforming to the standard. WSS data is transmitted on Line 23.
WSS data can only be transmitted when the ADV7172/ADV7173 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 71).
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 be transmitted on Line 23. The latter portion of
Line 23 (42.5
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
Position
0001
4:3
Full Format
Nonapplicable
1000
14:9
Letterbox
Center
0100
14:9
Letterbox
Top
1101
16:9
Letterbox
Center
0010
16:9
Letterbox
Top
1011
>16:9
Letterbox
Center
0111
14:9
Full Format
Center
1110
16:9
Nonapplicable
11.0 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 s
42.5 s
Figure 71. WSS Waveform Diagram
B4
0
Camera Mode
1
Film Mode
B5
0
Standard Coding
1
Motion Adaptive Color Plus
B6
0
No Helper
1
Modulated Helper
B7
RESERVED
B9
B10
0
No Open Subtitles
1
0
Subtitles In Active Image Area
0
1
Subtitles Out of Active Image Area
1
Reserved
B11
0
No Surround Sound Information
1
Surround Sound Mode
B12
RESERVED
B13
RESERVED
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