參數(shù)資料
型號： HIP8112A
廠商： Harris Corporation
英文描述： NTSC/PAL Video Decoder
中文描述： NTSC / PAL視頻解碼器
文件頁數(shù)： 16/40頁
文件大?。?/td> 719K
代理商： HIP8112A
4-16
TABLE 8. LUMINANCE CONTRAST ADJUST REGISTER
SUB ADDRESS = 0x02
BIT
NUMBER
FUNCTION
DESCRIPTION
RESET
STATE
7 - 0
Luminance Contrast
Adjust Factor
This register sets the contrast adjust factor which is applied after the brightness. This val-
ue is multiplied by the luminance data and allows the data to be scaled from 0 to a factor
of +1.996. This 8-bit number is a fractional number as shown below:
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
The default contrast factor of 1.4766 is calculated as follows:
Register Data = Factor * 128 = 1.4766 * 128 = 189 = 0xBD
1011 1101
B
(0xBD)
TABLE 9. HUE ADJUST REGISTER
SUB ADDRESS = 0x03
BIT
NUMBER
FUNCTION
DESCRIPTION
RESET
STATE
7 - 0
Hue Phase Adjust
This register sets the hue phase offset adjustment. This 8-bit number is applied as a
phase offset to the CbCr data coming out of the demodulator. This 8-bit number is a in
the range of +127 to -128. The hue adjust has as range of 30
o
with each count in this
register allowing a 0.25
o
phase adjustment. This register is in two’s complement format,
where bit 7 is the sign bit.
0000 0000
B
(0x00)
TABLE 10. LUMINANCE SHARPNESS CONTROL REGISTER
SUB ADDRESS = 0x04
BIT
NUMBER
FUNCTION
DESCRIPTION
RESET
STATE
7 - 6
High Frequency
Enhancement Factor
These bits adjust the amplitude of high frequency components in the luminance video
signal. The attenuation or multiplication of the high frequency components is adjusted as
shown below:
00 = Multiply high frequency components by 1.0
01 = Multiply high frequency components by 2.0
10 = Multiply high frequency components by 4.0
11 = Zero out high frequency components.
00
B
5 - 4
Middle Frequency
Enhancement
Factor
These bits adjust the amplitude of middle frequency components in the luminance video
signal. The attenuation or multiplication of the middle frequency components is adjusted
as shown below:
00 = Multiply middle frequency components by 1.0
01 = Multiply middle frequency components by 2.0
10 = Multiply middle frequency components by 4.0
11 = Zero out middle frequency components.
00
B
3 - 2
Low Frequency
Enhancement
Factor
These bits adjust the amplitude of low frequency components in the luminance video sig-
nal. The attenuation or multiplication of the low frequency components is adjusted as
shown below:
00 = Multiply low frequency components by 1.0
01 = Multiply low frequency components by 2.0
10 = Multiply low frequency components by 4.0
11 = Zero out low frequency components.
00
B
1 - 0
Vertical High
Frequency
Enhancement
Factor
These bits adjust the amplitude of vertical high frequency components in the luminance
video signal. The attenuation or multiplication of the vertical high frequency components
is adjusted as shown below:
00 = Multiply vertical high frequency components by 1.0
01 = Reserved.
10 = Reserved.
11 = Zero out vertical high frequency components.
00
B
HMP8112A
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