参数资料
| 型号： | EVAL-ADV7195EB |
| 厂商： | Analog Devices Inc |
| 文件页数： | 25/36页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADV7195 |
| 标准包装： | 1 |
| 主要目的： | 视频，视频处理 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADV7195 |
| 主要属性： | 多格式顺序扫描/HDTV 编码器，3 个 11 位 ADC |
| 次要属性： | 内部测试样式发生器，带颜色控制 |
| 已供物品： | 板 |
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ADV7195
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 crosshatch pattern change their sharpness.
Figure 46 shows the output signal when changing the Adaptive
Filter Mode to Mode B (MR56 = “1”).
Adaptive Filter Control Application
Figure 45 shows a typical signal to be processed by the Adaptive
TEK RUN
T
T
TRIG ’ D
Filter Control block.
TEK RUN
T
TRIG ’ D
T
4
M 100ns
CH4
4
CH4 100mV
T
ALL FIELDS
12.8222ms
Figure 46. Output Signal from Adaptive Filter Control
M 100ns
CH4
The Adaptive Filter Control can also be demonstrated using
CH4 100mV
T
ALL FIELDS
12.8222ms
the internally generated crosshatch test pattern and toggling
the Adaptive Filter Control Bit (MR57) using the following
Figure 45. Input Signal to Adaptive Filter Control
The following register settings were used to obtain the results
shown in Figure 47, i.e., to remove the ringing on the Y signal.
register settings:
Table VIII.
Input data was generated by an external signal source.
Address
Register Setting
Table VII.
A00hex
01hex
Mode Register 0
Mode Register 1
40hex
85hex
Address
Register Setting
02hex
Mode Register 2
00hex
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
03hex
04hex
05hex
06hex
07hex
08hex
09hex
10hex
22hex
23hex
24hex
25hex
26hex
27hex
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
78hex
00hex
80hex
6Chex
52hex
52hex
3Ehex
00hex
AChex
9Ahex
88hex
28hex
3Fhex
64hex
TEK RUN
T
4
T
TRIG ’ D
M 100ns
CH4
CH4 100mV
ALL FIELDS
12.8222ms
T
Figure 47. Output Signal from Adaptive Filter Control
REV. A
–25 –
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