參數(shù)資料
型號(hào)： SAA4974
廠(chǎng)商： NXP Semiconductors N.V.
英文描述： Besic without ADC
中文描述： 貝西奇沒(méi)有模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù)： 8/28頁(yè)
文件大小： 173K
代理商： SAA4974
1998 Apr 21
8
Philips Semiconductors
Product specification
Besic without ADC
SAA4974H
V
SSA3
YOUT
V
DDA2
78
79
80
analog ground 3
Y analog output
analog supply voltage 2 (3.3 V)
SYMBOL
PIN
DESCRIPTION
7
FUNCTIONAL DESCRIPTION
7.1
Digital processing at 2f
H
level
7.1.1
4 : 1 : 1
TO
4 : 2 : 2
UP
-
CONVERSION
An up-converter to 4 : 2 : 2 is applied with a linear
interpolation filter for creation of the extra samples. These
are combined with the original samples from the 4 : 1 : 1
stream.
7.1.2
DCTI
The Digital Colour Transient Improvement (DCTI) is
intended for U and V signals originating from a 4 : 1 : 1
source. Horizontal transients are detected and enhanced
without overshoots by differentiating, make absolute and
again differentiating the U and V signals separately. This
results in a 4 : 4 : 4 U and V bandwidth. To prevent third
harmonic distortion, typical for this processing, a so called
over the hill protection prevents peak signals to become
distorted.
Via I
2
C-bus it is possible to control: gain width (see Fig.4),
threshold (i.e. immunity against noise), selection of simple
or improved first differentiating filter (see Fig.3), limit for
pixel shift range (see Fig.5), common or separate
processing of U and V signals, hill protection mode (i.e. no
discolourations in narrow colour gaps), low-pass filtering
for U and V signals (see Fig.6) and a so called super hill
mode, which avoids discolourations in transients within a
colour component.
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參數(shù)描述
SAA4974H 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Besic without ADC
SAA4977H 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Besic
SAA4978 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Picture Improved Combined Network PICNIC
SAA4978H 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Picture Improved Combined Network PICNIC
SAA4979H 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Sample rate converter with embedded high quality dynamic noise reduction and expansion port
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