參數(shù)資料
型號(hào)： CH7008A-T
廠商： Electronic Theatre Controls, Inc.
英文描述： Digital PC to TV Encoder Features
中文描述： 數(shù)字電視編碼器電腦功能
文件頁(yè)數(shù)： 31/49頁(yè)
文件大?。?/td> 341K
代理商： CH7008A-T
201-0000-027 Rev 2.2, 9/30/99
31
CHRONTEL
CH7008A
Register Descriptions
(continued)
Video Bandwidth Register
Symbol: VBW
Address: 03H
Bits: 8
This register enables the selection of alternative filters for use in the luma and chroma channels. There are currently
four filter options defined for the chroma channel, four filter options in the S-Video luma channel and two filter
options in the composite luma channel. The
Tables 15
and
16
below show the various settings.
Bit 6 (CVBW) outputs the S-Video luma signal on both the S-Video luma output and the CVBS output. A 1 in this
location enables the output of a black and white image on composite video, thereby eliminating the degrading
effects of the color signal (such as dot crawl or false colors), which is useful for viewing text with high accuracy.
Bit 7 (FLFF) controls the flicker filter used in the 7/10’s scaling modes. In these scaling modes, setting FLFF to 1
causes a five line flicker filter to be used. The default setting of 0 uses a four line flicker filter.
Bit:
Symbol:
Type:
Default:
7
FLFF
6
CVBW
5
CBW1
4
CBW0
3
YPEAK
2
YSV1
1
YSV0
0
YCV
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
Table 15. Luma Filter Bandwidth
YCV
0
1
YSV[1:0]
00
01
10
11
YPEAK
0
1
Luma Composite Video Filter Adjust
Low bandwidth
High bandwidth
Luma S-Video Filter Adjust
Low bandwidth
Medium bandwidth
High bandwidth
Reserved
Disables the Y-peaking circuit
Disables the peaking filter in luma s-video channel
Enables the peaking filter in luma s-video channel
Table 16. Chroma Filter Bandwidth
CBW[1:0]
0 0
0 1
1 0
1 1
Chroma Filter Adjust
Low bandwidth
Medium bandwidth
Med-high bandwidth
High bandwidth
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