參數(shù)資料
型號(hào): SAA7118H
廠商: NXP SEMICONDUCTORS
元件分類: 顏色信號(hào)轉(zhuǎn)換
英文描述: Multistandard video decoder with adaptive comb filter and component video input
中文描述: COLOR SIGNAL DECODER, PQFP160
封裝: 28 X 28 MM, 3.40 MM HEIGHT, PLASTIC, MS-022, SOT322-2 , QFP-160
文件頁數(shù): 52/169頁
文件大?。?/td> 665K
代理商: SAA7118H
2001 May 30
52
Philips Semiconductors
Preliminary specification
Multistandard video decoder with adaptive
comb filter and component video input
SAA7118
Remark
: Due to bandwidth considerations XPSC[5:0] and
XACL[5:0] can be chosen different to the previously
mentioned equations or Table 12, as the H-phase scaling
is able to scale in the range from zooming up by factor 3 to
downscale by a factor of
1024
8191
.
Figs 33 and 34 show some resulting frequency
characteristics of the prescaler.
Table 12 shows the recommended prescaler
programming. Other programmings, other than given in
Table 12, may result in better alias suppression, but the
resulting DC gain amplification needs to be compensated
by the BCS control, according to the equation:
Where:
2
XDCG[2:0]
DC gain
DC gain = (XC2_1 + 1)
×
XACL[5:0] + (1
XC2_1).
For example, if XACL[5:0] = 5, XC2_1 = 1, then the
DC gain = 10 and the required XDCG[2:0] = 4.
The horizontal source acquisition timing and the
prescalingratioisidenticalforboththeluminancepathand
chrominance path, but the FIR filter settings can be
defined differently in the two channels.
Fade-in and fade-out of the filters is achieved by copying
an original source sample each as first and last pixel after
prescaling.
Figs 31 and 32 show the frequency characteristics of the
selectable FIR filters.
CONT[7:0]
SATN[7:0]
lower integer of
XDCG[2:0]
64
×
DC gain
=
=
Table 11
FIR prefilter functions
PFUV[1:0] A2H[7:6]
PFY[1:0] A2H[5:4]
LUMINANCE FILTER COEFFICIENTS
CHROMINANCE COEFFICIENTS
00
01
10
11
bypassed
1 2 1
bypassed
1 2 1
3 8 10 8 3
1 2 2 2 1
1 1 1.75 4.5 1.75 1
1
1 2 2 2 1
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參數(shù)描述
SAA7118H/V1,557 功能描述:視頻 IC VIDEO DECODER 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
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