參數(shù)資料
型號(hào)： ADV7179KCPZ-REEL
廠商： Analog Devices Inc
文件頁數(shù)： 38/52頁
文件大?。?/td> 0K
描述： IC ENCODER VID NTSC/PAL 40LFCSP
標(biāo)準(zhǔn)包裝： 1
類型： 視頻編碼器
應(yīng)用： 數(shù)碼相機(jī)，手機(jī)，便攜式視頻
電壓 - 電源，模擬： 2.8 V，3.3 V
安裝類型： 表面貼裝
封裝/外殼： 40-VFQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 40-LFCSP-VQ（6x6）
包裝： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面： 786 (CN2011-ZH PDF)
其它名稱： ADV7179KCPZ-REELDKR
ADV7174/ADV7179
Rev. B | Page 43 of 52
APPENDIX 4—WIDE SCREEN SIGNALING (WSS)
The ADV7174/ADV7179 supports WSS, conforming to the
standard. WSS data is transmitted on Line 23. WSS data can
only be transmitted when the ADV7174/ ADV7179 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 be
transmitted on Line 23. The latter portion of Line 23 (42.5 μs
from the falling edge of HSYNC) is available for the insertion of
video.
FUNCTION OF WSS BITS
Table 22. Bit 0–Bit 2 Bit 3 is the odd parity check of Bit 0–Bit 2
B0
B1
B2
B3
Aspect
Ratio
Format
Position
0
1
4:3
Full
Format
Not
Applicable
1
0
14:9
Letterbox
Center
0
1
0
14:9
Letterbox
Top
1
0
1
16:9
Letterbox
Center
0
1
0
16:9
Letterbox
Top
1
0
1
>16:9
Letterbox
Center
0
1
14:9
Full
Format
Center
1
0
16:9
Not
Applicable
Not
Applicable
Table 23. Bit 4–Bit 7
Bit
Value
Description
B4
0
1
Camera Mode
Film Mode
B5
0
1
Standard Coding
Motion Adaptive Color Plus
B6
0
1
No Helper
Modulated Helper
B7
Reserved
B8
0
1
No Teletext Subtitles
Teletext Subtitles
B9–B10
0, 0
No Open Subtitles
1, 0
Subtitles in Active Image Area
0, 1
Subtitles out of Active Image Area
1, 1
Reserved
B11
0
1
No Surround Sound Information
Surround Sound Mode
B12
Reserved
B13
Reserved
11.0
μs
W0
W1 W2
W3 W4
W5
W6 W7
W8 W9 W10 W11 W12 W13
500mV
RUN-IN
SEQUENCE
START
CODE
ACTIVE
VIDEO
02980-A
-057
38.4
μs
42.5
μs
Figure 58. WSS Waveform Diagram
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