Dolby Laboratories P/N 91659 - Manual (Page 22)

DolbyRemote Installation and Operation Dolby Digital Parameters
4-6
4.2 Preprocessing
Figure 4-3 Preprocessing Tab
4.2.1 Input Filtering
Deemphasis
The Deemphasis parameter controls whether or not 50/15 µs digital deemphasis may
be applied to the main input channels before the Dolby Digital encoding process is
performed. If Deemphasis is set to Disabled, deemphasis will never be applied and
the emphasis channel status bit of input signals will be ignored. If the parameter is set
to Automatic, digital deemphasis will automatically be applied to input signals if the
emphasis channel status bit indicates 50/15
µs pre-emphasis has been applied. The
state of Deemphasis and the channel status bit will be ignored whenever pre-encoded
bitstreams are being received, Pass Through mode is active.
DC Highpass Filter
DC Highpass Filter controls whether or not a DC blocking 3 Hz highpass filter is
applied to the main channel inputs before the Dolby Digital encoding process.
Bandwidth Lowpass Filter
Bandwidth Lowpass Filter controls whether or not a bandwidth limiting lowpass
filter is applied to the main input channels before the Dolby Digital encoding process.
LFE Lowpass Filter
LFE Lowpass Filter controls whether or not a 120 Hz lowpass filter is applied to the
LFE channel before the Dolby Digital encoding process. This parameter is ignored if
the LFE channel is disabled. This parameter is not available on the DP567.