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參數(shù)資料
| 型號： | ADV612 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 視頻Codec |
| 英文描述： | Closed Circuit TV Digital Video Codec(閉路電視數(shù)字視頻編碼譯碼器) |
| 中文描述： | 閉路電視數(shù)字視頻編解碼器（閉路電視數(shù)字視頻編碼譯碼器） |
| 文件頁數(shù)： | 3/48頁 |
| 文件大小： | 1085K |
| 代理商： | ADV612 |
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ADV611/ADV612
–3–
REV. PrA
television (CCTV) applications. The most important feature of
these two devices is the “Quality Box.” With this feature the
user can define a box of any size and location within each field
of video that will be compressed at full contrast while the re-
mainder outside the box, or background of the image, is com-
pressed at a lower level of contrast. The background contrast
level is controlled by the user. The lower the contrast level, the
more the image will be compressed. The objective in a given
application is to adjust the background contrast to a level that
TECHNCAL
DATA
package and pin assignments are different. The ADV611 is
housed in a plastic TQFP package suitable for cost-sensitive
commercial applications. The ADV612 is housed in a rugged
EDQUAD TQFP package suitable for industrial temperature
ranges. In addition, the heat slug in the ADV612 allows the part
to be used in small spaces where cooling is limited (see Table
II). The pin assignments of the ADV611 and ADV612 are dif-
The ADV611 and ADV612 are real-time compression integrated
circuits designed for remote video surveillance or closed circuit
Table II. Differences Between the ADV601, ADV601LC, ADV611 and ADV612
ADV601
ADV601LC
ADV611
ADV612
Bits per Component
DSP Serial Port
Package
Pin Assignments
Temperature Range
θ
JA
θ
JC
Field Rate Reduction
Stall Mode
Field Truncation
Field Size Register
Field Bit Polarity Control
Evaluation Board
Target Applications
10
Yes
160 PQFP
Unique
0
°
C to +70
°
C
31
°
C/W
7.5
°
C/W
Software
No
No
No
No
VideoLab
Professional
8
No
120 TQFP
Unique
0
°
C to +70
°
C
43
°
C/W
4.7
°
C/W
Software
No
No
No
No
VideoPipe
Consumer
8
No
120 TQFP
98% Similar to ADV601LC
0
°
C to +70
°
C
43
°
C/W
4.7
°
C/W
Hardware
Yes
Yes
Yes
Yes
CCTVPIPE
CCTV
8
No
120 EDQUAD TQFP
“Mirror” of ADV611
–25
°
C to +85
°
C
33
°
C/W
0.5
°
C/W
Hardware
Yes
Yes
Yes
Yes
CCTVPIPE
Industrial CCTV
Figure 3.
ensures both a recognizable and useful background as well as
the highest possible compression. Figure 3 shows how this qual-
ity box appears in final video.
The ADV611 and ADV612 use the exact same silicon, but the
Original Video Image
Image after compression/decompression shown
with different box size and position
PROGRAMMABLE
QUALITY BOX
VARIABLE CONTRAST
BACKGROUND
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