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參數(shù)資料
| 型號： | SAA4974 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Besic without ADC |
| 中文描述： | 貝西奇沒有模數(shù)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/28頁 |
| 文件大小： | 173K |
| 代理商： | SAA4974 |
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1998 Apr 21
11
Philips Semiconductors
Product specification
Besic without ADC
SAA4974H
7.1.3
Y-
PEAKING
A linear peaking is applied, which amplifies the luminance
signal in the middle and the upper ranges of the
bandwidth.
The filtering is an addition of:
The original signal
The original signal band-passed with centre
frequency =
1
4
f
s
The original signal high-passed with maximum gain at
frequency =
1
2
f
s
.
The band-passed and high-passed signals are weighted
with factors 0,
1
8
,
1
4
and
1
2
. The impulse response
becomes [
α
,
β
, 1 + 2
α
+ 2
β
,
β
,
α
], where
α
is the
band-pass weighting factor and
β
the high-pass weighting
factor.
Coring is added to obtain no gain for low amplitudes in the
(high-pass + band-pass) signal, which is then considered
to be noise. Coring levels can be programmed as 0 (off),
+1/
2, +3/
4 and +7/
8 LSB at 8-bit word.
Fig.7
Peaking transfer function with variation of
β
(
α
=
1
8
).
(1)
β
=
1
2
.
(2)
β
=
1
4
.
(3)
β
=
1
8
.
(4)
β
= 0.
handbook, halfpage
0
0
2
4
6
8
10
1/4fs
1/2fs
MGE097
IH_PeakingI
(dB)
(1)
(2)
(3)
(4)
Fig.8
Peaking transfer function with variation of
β
(
α
=
1
4
).
(1)
β
=
1
2
.
(2)
β
=
1
4
.
(3)
β
=
1
8
.
(4)
β
= 0.
handbook, halfpage
0
0
2
4
6
8
10
1/4fs
1/2fs
MGE098
IH_PeakingI
(dB)
(1)
(2)
(3)
(4)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA4974H | Besic without ADC |
| SAA4977H | Besic |
| SAA4978 | Picture Improved Combined Network PICNIC |
| SAA4978H | Picture Improved Combined Network PICNIC |
| SAA4979H | Sample rate converter with embedded high quality dynamic noise reduction and expansion port |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA4974H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Besic without ADC |
| SAA4977H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Besic |
| SAA4978 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Picture Improved Combined Network PICNIC |
| SAA4978H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Picture Improved Combined Network PICNIC |
| SAA4979H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Sample rate converter with embedded high quality dynamic noise reduction and expansion port |
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