參數(shù)資料
型號： 935267395518
廠商： NXP SEMICONDUCTORS
元件分類： 顏色信號轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PBGA156
封裝： 15 X 15 MM, 1.15 MM HEIGHT, PLASTIC, MS-034, SOT-472-1, BGA-156
文件頁數(shù)： 127/178頁
文件大小： 988K
代理商： 935267395518
2004 Jul 22
52
Philips Semiconductors
Product specication
Multistandard video decoder with adaptive
comb lter and component video input
SAA7118
Remark: Due to bandwidth considerations XPSC[5:0] and
XACL[5:0] can be chosen differently 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
downscaling by a factor of 1024
8191.
Figures 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:
2XDCG[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
prescaling ratio is identical for both the luminance path and
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.
Figures 31 and 32 show the frequency characteristics of
the selectable FIR filters.
CONT[7:0]
SATN[7:0]
lower integer of
2
XDCG[2:0]
DC gain
64
×
----------------------------------
==
Table 11 FIR prelter functions
PFUV[1:0] A2H[7:6]
PFY[1:0] A2H[5:4]
LUMINANCE FILTER
COEFFICIENTS
CHROMINANCE COEFFICIENTS
00
bypassed
01
121
10
1 1 1.75 4.5 1.75 1 1
381083
11
12221
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