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2004 Jan 26 44
Philips Semiconductors Product specification
MPEG-2 video and MPEG-audio/AC-3
audio encoder with multiplexer
SAA6752HS
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Table 18 I
2
C-bus video front-end filters static/dynamic settings
ADR
HEX
M
COMMAND
NAME
R/W SIZE/POSITION PARAMETER/RANGE DEFAULT DESCRIPTION
50 I, E, P,
S
noise pre-filter
off/on
R/W 1 byte off enables or disables noise pre-filter and selects
the mode for this filter
bit[1:0] = 00 off
bit[1:0] = 01 median filter
bit[1:0] = 10 average filter
51 I, E, P,
S
noise pre-filter
coefficients
R/W 4 bytes 4 × 6 bits; bits 0 to 5 valid 33H, 20H,
16H, 0DH
defines the filter coefficients for the noise
pre-filter
52 I, E, P,
S
noise pre-filter
thresholds
R/W 3 bytes 3 × 6 bits; bits 0 to 5 valid 10, 15, 20 defines the threshold coefficients for the
median filter
53 I, E, P,
S
horizontal filter
off/on
R/W 1 byte off enables or disables the horizontal filter by
bypassing
bit 0 = 0 off
bit0=1 on
54 I, E, P,
S
horizontal filter
coefficients
R/W 16 bytes array of word (8 × 10 bits) first word
= 256, the
others = 0
Defines the coefficients for the horizontal filter;
the default applies to D1 mode only. When
other subsampling modes are selected the
SAA6752HS automatically overwrites the
horizontal filter coefficients with the
appropriate parameters.
55 I, E, P,
S
horizontal filter
scaling factor
R/W 1 byte (4 bits) 0 to 15 8 Defines the scaling factor for the horizontal
filter; the default applies to D1 mode only.
When other subsampling modes are selected
the SAA6752HS automatically overwrites the
horizontal filter scaling parameter with the
appropriate parameter.