ADV8003 Hardware Manual
Rev. B, August 2013
316
Filter
Pass-Band Ripple (dB)
1
3 dB Bandwidth (MHz)
2
Luma Notch PAL
0.1
3.1/5.6/6.4
Luma SSAF
0.04
6.45
Luma CIF
0.127
3.02
Luma QCIF
Monotonic
1.5
Chroma 0.65 MHz
Monotonic
0.65
Chroma 1.0 MHz
Monotonic
1
Chroma 1.3 MHz
0.09
1.395
Chroma 2.0 MHz
0.048
2.2
Chroma 3.0 MHz
Monotonic
3.2
Chroma CIF
Monotonic
0.65
Chroma QCIF
Monotonic
0.5
1
Pass-band ripple is the maximum fluctuation from the 0 dB response in the pass band, measured in decibels. The pass band is defined to have 0 Hz to fc (Hz)
frequency limits for a low-pass filter and 0 Hz to f1 (Hz), and f2 (Hz) to infinity for a notch filter, where fc, f1, and f2 are the −3 dB points.
2
3 dB bandwidth refers to the −3 dB cutoff frequency.
The luma filter supports several different frequency responses, including two low-pass responses, two notch responses, an extended
(SSAF) response with or without gain boost attenuation, a CIF response, and a QCIF response. These can be configured using
luma_filter_sel[2:0]
, Encoder Map,
Address 0xE480[4:2]
This signal is used to configure the luma filters for SD data.
Function
luma_filter_sel[2:0]
Description
000
LPF NTSC
001
LPF PAL
010
Notch NTSC
011
Notch PAL
100
SSAF Luma
101
Luma CIF
110
Luma QCIF
111
Reserved
If SD SSAF gain is enabled, there are 13 response options in the −4 dB to +4 dB range. The desired response can be programmed using
register 0xA2. The variation in frequency responses is shown in
. The registers required for enabling
and controlling the SSAF filter gain are described below.
FREQUENCY (MHz)
4
7
M
AG
NI
T
UDE
(
d
B)
2
–2
–6
–8
–12
0
–4
5
–10
6
0
1
2
3
4
06398-
036
Figure 106: SD Luma SSAF Filter, Programmable Responses
Summary of Contents for ADV8003
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