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参数资料
| 型号： | CH7006C-T |
| 厂商： | Electronic Theatre Controls, Inc. |
| 元件分类： | 圆形连接器 |
| 英文描述： | Circular Connector; Body Material:Aluminum; Series:PT06; Number of Contacts:18; Connector Shell Size:14; Connecting Termination:Crimp; Circular Shell Style:Straight Plug; Circular Contact Gender:Socket; Insert Arrangement:14-18 |
| 中文描述： | 数字电视编码器电脑功能 |
| 文件页数： | 13/49页 |
| 文件大小： | 338K |
| 代理商： | CH7006C-T |
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201-0000-026 Rev 2.1, 8/2/99
13
CHRONTEL
CH7006C
Display Modes
(continued)
t is disigned to support output to either NTSC or PAL television formats. The CH7005 provides interpolated scaling
with selectable factors of 5:4, 1:1, 7:8, 5:6, 3:4 and 7:10 in order to support adjustable overscan or underscan
operation when displayed on a TV. This combination of factors results in a matrix of useful operating modes which
are listed in detail in
Table 10.
(1) Note:
Percent underscan is a calculated value based on average viewable lines on each TV format, assuming an average TV over-
scan
of 10%. (Negative values) indicate modes which are operating in underscan.
For NTSC: 480 active lines - 10% (overscan) = 432 viewable lines (average)
For PAL: 576 active lines - 10% (overscan) = 518 viewable lines (average)
The inclusion of multiple levels of scaling for each resolution have been created to enable optimal use of the
CH7006 for different application needs. In general, underscan (modes where percent overscan is negative provides
an image that is viewable in its entirety on screen; it should be used as the default for most applications (e.g.,
viewing text screens, operating games, running productivity applications and working within Windows).
Overscanning provides an image that extends past the edges of the TV screen, exactly like normal television
programs and movies appear on TV, and is only recommended for viewing movies or video clips coming from the
computer. In addition to the above mode table, the CH7006 also support interlaced input modes, both in CCIR 656
and proprietary formats (see Display Mode Register section.)
Flicker Filter and Text Enhancement
The CH7006 integrates an advanced 2-line, 3-line, 4-line and 5-line (depending on mode) vertical deflickering filter
circuit to help eliminate the flicker associated with interlaced displays. This flicker circuit provides an adaptive
filter algorithm for implementing flicker reduction with selections of high, medium or low flicker content for both
luma and chroma channels (see register descriptions). In addition, a special text enhancement circuit incorporates
Table 10. CH7006 Display Modes
TV Format
Standard
Input
(active)
Resolution
640x480
640x480
640x480
800x600
800x600
800x600
640x400
640x400
640x400
720x400
720x400
512x384
512x384
Scale
Factor
Active
TV Lines
Percent (1)
Overscan
Pixel
Clock
Horizontal
Total
Vertical
Total
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
1:1
7:8
5:6
5:6
3:4
7:10
5:4
1:1
7:8
5:4
1:1
5:4
1:1
480
420
400
500
450
420
500
400
350
500
400
480
384
10%
(3%)
(8%)
16%
4%
(3%)
16%
(8%)
(19%)
16%
(8%)
10%
(11%)
24.671
28.196
30.210
39.273
43.636
47.832
21.147
26.434
30.210
23.790
29.455
20.140
24.671
784
784
800
1040
1040
1064
840
840
840
945
936
800
784
525
600
630
630
700
750
420
525
600
420
525
420
525
PAL
PAL
PAL
PAL
PAL
PAL
PAL
PAL
PAL
PAL
PAL
PAL
640x480
640x480
640x480
800x600
800x600
800x600
640x400
640x400
720x400
720x400
512x384
512x384
5:4
1:1
5:6
1:1
5:6
3:4
5:4
1:1
5:4
1:1
5:4
1:1
600
480
400
600
500
450
500
400
500
400
480
384
14%
(8%)
(29%)
14%
(4%)
(15%)
(4%)
(29%)
(4%)
(29%)
(8%)
(35%)
21.000
26.250
31.500
29.500
36.000
39.000
25.000
31.500
28.125
34.875
21.000
26.250
840
840
840
944
960
936
1000
1008
1125
1116
840
840
500
625
750
625
750
836
500
625
500
625
500
625
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| CH7006C-V | Circular Connector; Body Material:Aluminum; Series:PT06; No. of Contacts:18; Connector Shell Size:14; Connecting Termination:Crimp; Circular Shell Style:Straight Plug; Circular Contact Gender:Socket; Insert Arrangement:14-18 |
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