參數(shù)資料
型號(hào)： CH7008A-V
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)： 34/49頁(yè)
文件大小： 341K
代理商： CH7008A-V
CHRONTEL
CH7008A
34
201-0000-027 Rev 2.2, 9/30/99
Register Descriptions
(continued)
Position Overflow Register
Symbol: PO
Address: 08H
Bits: 3
This position overflow register contains the MSB values for the SAV, HP and VP values, as follows:
VP8 (bit 0) is the MSB of the vertical position value (see explanation under “Vertical Position Register”).
HP8 (bit 1) is the MSB of the horizontal position value (see explanation under “Horizontal Position
Register”).
SAV8 (bit 2) is the MSB of the start of active video value (see explanation under “Start Active Video
Register”).
Black Level Register
Symbol: BLR
Address: 09H
Bits: 8
This register sets the black level. The luminance data is added to this black level, which must be set between 90 and
208, with the default value being 127. Recommended values for NTSC and PAL-M are 127, 105 for PAL and 100
for NTSC-J.
Horizontal Position Register
Symbol: HPR
Address: 0AH
Bits: 8
The horizontal position register is used to shift the displayed TV image in a horizontal direction (left or right) to
achieve a horizontally centered image on screen. The entire bit field, HP[8:0] is comprised of this register HP[7:0]
plus the MSB value contained in the position overflow register, bit HP8. Increasing this value moves the displayed
image position RIGHT; decreasing this value moves the displayed image position LEFT. Each increment moves the
image position by 4 input pixels.
Bit:
Symbol:
Type:
Default:
7
6
5
4
3
2
SAV8
1
HP8
0
VP8
R/W
R/W
R/W
0
0
0
Bit:
Symbol:
Type:
Default:
7
BL7
6
BL6
5
BL5
4
BL4
3
BL3
2
BL2
1
BL1
0
BL0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
1
1
1
1
1
1
1
Bit:
Symbol:
Type:
Default:
7
HP7
6
HP6
5
HP5
4
HP4
3
HP3
2
HP2
1
HP1
0
HP0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
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