參數(shù)資料
型號(hào)： ADV7196
廠商： Analog Devices, Inc.
英文描述： Multiformat Progressive Scan/HDTV Encoder with Three 11-Bit DACs, 10-Bit Data Input, and Macrovision
中文描述： 多格式逐行掃描/高清晰度電視編碼器三種11位DAC，10位數(shù)據(jù)輸入，以及Macrovision
文件頁(yè)數(shù)： 25/36頁(yè)
文件大小： 501K
代理商： ADV7196
REV. 0
ADV7196A
–25–
In toggling MR17 (Sharpness Filter Enable/Disable) and setting
the Filter Gain register value to 99hex it can be seen that the line
contours of the cross hatch pattern change their sharpness
.
Adaptive Filter Control Application
The figure below shows a typical signal to be processed by the
Adaptive Filter Control block.
T
4
TEK RUN
T
TRIG
’
D
M 100ns
12.8222ms
T
CH4
ALL FIELDS
CH4
100mV
Figure 45. Input Signal to Adaptive Filter Control
The following register settings where used to obtain the
results shown in the figure below, i.e., to remove the ringing
on the Y signal:
Input data was generated by an external signal source.
Table VII.
Address
Register Setting
00hex
01hex
02hex
03hex
04hex
05hex
09hex
10hex
22hex
23hex
24hex
25hex
26hex
27hex
Mode Register 0
Mode Register 1
Mode Register 2
Mode Register 3
Mode Register 4
Mode Register 5
Mode Register 6
Filter Gain
Adaptive Filter Gain 1
Adaptive Filter Gain 2
Adaptive Filter Gain 3
Adaptive Filter Threshold A
Adaptive Filter Threshold B
Adaptive Filter Threshold C
40hex
81hex
00hex
78hex
00hex
80hex
3Ehex
00hex
AChex
9Ahex
88hex
28hex
3Fhex
64hex
The figure below shows the output signal when changing the Adap-
tive Filter mode to Mode B (MR56 = “1”).
T
4
TEK RUN
T
TRIG
’
D
M 100ns
12.8222ms
T
CH4
ALL FIELDS
CH4
100mV
Figure 46. Output Signal from Adaptive Filter Control
The Adaptive Filter control can also be demonstrated using the
internally generated crosshatch test pattern and toggling the Adap-
tive Filter Control bit (MR57) using the following register settings:
Table VIII.
Address
Register Setting
00hex
01hex
02hex
03hex
04hex
05hex
06hex
07hex
08hex
09hex
10hex
22hex
23hex
24hex
25hex
26hex
27hex
Mode Register 0
Mode Register 1
Mode Register 2
Mode Register 3
Mode Register 4
Mode Register 5
Color Y
Color Cr
Color Cb
Mode Register 6
Filter Gain
Adaptive Filter Gain 1
Adaptive Filter Gain 2
Adaptive Filter Gain 3
Adaptive Filter Threshold A
Adaptive Filter Threshold B
Adaptive Filter Threshold C
40hex
85hex
00hex
78hex
00hex
80hex
6Chex
52hex
52hex
3Ehex
00hex
AChex
9Ahex
88hex
28hex
3Fhex
64hex
T
4
TEK RUN
T
TRIG
’
D
M 100ns
12.8222ms
T
CH4
ALL FIELDS
CH4
100mV
Figure 47. Output Signal from Adaptive Filter Control
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PDF描述
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ADV7196A 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat Progressive Scan/HDTV Encoder with Three 11-Bit DACs, 10-Bit Data Input, and Macrovision
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