SAA4974 Philips, SAA4974 Datasheet - Page 11

• Manufacturer Part Number: SAA4974
• Description: Besic without ADC
• Manufacturer: Philips

Philips Semiconductors
7.1.3
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:
1998 Apr 21
The original signal
The original signal band-passed with centre
frequency =
The original signal high-passed with maximum gain at
frequency =
Besic without ADC
IH_PeakingI
(1)
(2)
(3)
(4)
Fig.7
handbook, halfpage
(dB)
=
=
=
= 0.
Y-
1
1
1
12
10
2
4
8
Peaking transfer function with variation of
( =
PEAKING
8
6
4
2
0
.
.
.
0
1
1
1
4
2
f
f
8
s
s
).
.
1/4f s
(1)
(3)
(4)
(2)
MGE097
1/2f s
11
The band-passed and high-passed signals are weighted
with factors 0,
becomes [
band-pass weighting factor and 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.
IH_PeakingI
(1)
(2)
(3)
(4)
Fig.8
handbook, halfpage
(dB)
=
=
=
= 0.
1
1
1
12
10
2
4
8
Peaking transfer function with variation of
( =
.
.
.
8
6
4
2
0
0
,
1
8
1
,
, 1 + 2 + 2 ,
4
).
1
4
and
1
2
. The impulse response
1/4f s
,
(1)
(3)
(4)
(2)
Product specification
], where
SAA4974H
MGE098
is the
1/2f s