參數(shù)資料
型號(hào): SAF7118H
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Multistandard video decoder with adaptive comb filter and component video input
封裝: SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;
文件頁(yè)數(shù): 25/175頁(yè)
文件大?。?/td> 898K
代理商: SAF7118H
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SAF7118_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 4 July 2008
25 of 175
NXP Semiconductors
SAF7118
Multistandard video decoder with adaptive comb filter
8.1.2.2
Luminance path
The rejection of the chrominance components within the 9-bit CVBS or Y input signal is
achieved by subtracting the remodulated chrominance signal from the CVBS input.
The comb filtered C
B
-C
R
components are interpolated (upsampled) by the low-pass
3 block. Its characteristic is controlled by LUBW (subaddress 09h, bit D4) to modify the
width of the chrominance ‘notch’ without influencing the chrominance path. The
programmable frequency characteristics available, in conjunction with the LCBW2 to
LCBW0 settings, can be seen in
Figure 14
to
Figure 17
. It should be noted that these
frequency curves are only valid for Y-comb disabled filter mode (YCOMB = 0). In comb
filter mode the frequency response is flat. The center frequency of the notch is
automatically adapted to the chosen color standard.
The interpolated C
B
-C
R
samples are multiplied by two time-multiplexed subcarrier signals
from the subcarrier generation block 2. This second DTO is locked to the first subcarrier
generator by an increment delay circuit matched to the processing delay, which is different
for PAL and NTSC standards according to the chosen comb filter algorithm. The two
modulated signals are finally added to build the remodulated chrominance signal.
The frequency characteristic of the separated luminance signal can be further modified by
the succeeding luminance filter block. It can be configured as peaking (resolution
enhancement) or low-pass block by LUFI3 to LUFI0 (subaddress 09h, bits D3 to D0). The
16 resulting frequency characteristics can be seen in
Figure 18
. The LUFI3 to LUFI0
settings can be used as a user programmable sharpness control.
The luminance filter block also contains the adjustable Y-delay part; programmable by
YDEL2 to YDEL0 (subaddress 11h, bits D2 to D0).
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAF7118H/V1,557 功能描述:視頻 IC COMPONENT VID DECODR RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAF7129AH 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital video encoder
SAF7129AH/V1 功能描述:視頻 IC 6 DAC VIDEO ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAF7129AH/V1,518 功能描述:視頻 IC 6 DAC VIDEO ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAF7129AH/V1,557 功能描述:視頻 IC 6 DAC VIDEO ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel