bt829bkrf ETC-unknow, bt829bkrf Datasheet - Page 102

• Manufacturer Part Number: bt829bkrf
• Description: Video Streamii Decoders
• Manufacturer: ETC-unknow

92
4.0 Control Register Definitions
0x10—SC Loop Control (SCLOOP)
0x10—SC Loop Control (SCLOOP)
This control register may be written to or read by the MPU at any time. Upon reset, it is initialized to 0x00.
ACCEL is the LSB. An asterisk indicates the default option.
PEAK
CAGC
CKILL
HFILT
Reserved
PEAK
7
0
This bit determines whether the normal luma low pass filters are implemented via the HFILT
bits, or whether the peaking filters are implemented. The LDEC bit in the control register must
be programmed to zero to use these filters.
This bit controls the Chroma AGC function. When enabled, Chroma AGC will compensate for
non-standard chroma levels. The compensation is achieved by multiplying the incoming
chroma signal by a value in the range of 0.5 to 2.0.
This bit determines whether the low color detector and removal circuitry is enabled.
These bits control the configuration of the optional 6-tap Horizontal Low-Pass Filter. The Auto
Format Mode determines the appropriate low-pass filter based on the selected horizontal scal-
ing ratio. To use these filters, the LDEC bit in the CONTROL register must be programmed to
zero.
These bits must be set to zero.
CAGC
If the PEAK bit is set to logical 1, the HFILT bits determine which peaking filter is selected.
6
0
CKILL
5
0
0*
1
0*
1
0*
1
00* =
01
10
11
00
01
10
11
=
=
=
=
=
=
=
=
=
=
=
=
=
Normal luma low pass filtering
Use luma peaking filters
Chroma AGC Disabled
Chroma AGC Enabled
Low Color Detection and Removal Disabled
Low Color Detection and Removal Enabled
Auto Format—If Auto Format is selected when horizontally
scaling between full resolution and half resolution, no filtering is
selected. When scaling between one-half and one-third
resolution, the CIF filter is used. When scaling between one-
third and one-seventh resolution, the QCIF filter is used; at less
than one-seventh resolution, the ICON filter is used.
CIF
QCIF (When decoding SECAM video, this filter must be
enabled.)
ICON
Maximum peaking response
Medium peaking response
Low peaking response
Minimum peaking response
4
0
D829BDSA
HFILT
3
0
2
0
Reserved
VideoStream II Decoders
1
0
Bt829B
0
0