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Glossary
44
LFE
The Low Frequency Effects (LFE) channel
which enhances movie soundtracks with
extreme bass sound effects up to 200Hz. It
is band-limited to 120Hz in a Dolby Digital
system.
LFE sub
A subwoofer which plays the full LFE signal
in Dolby Digital, DTS, and MPEG presets.
MHR
Meridian High Resolution, a proprietary
secure encoding format using encryption
and anti-copy methods that allows
secure transfer of audio streams between
elements of a Meridian-only system for
the purpose of playback only. It provides
a secure copyright protection environment
and has the very important benefit of
lowering jitter and improving sound quality
on all material.
MLP
Meridian Lossless Packing, an audio format
that increases the amount of information
that can be recorded without any loss of
quality. The reference format for DVD-A
material.
Mono sub
A subwoofer which handles all the bass for
the system. A THX standard subwoofer has
a crossover at 80Hz.
Mono surrounds
Surrounds which have a common signal
steered to them. This may then be
decorrelated by the THX process to give a
more spacious sound.
MPEG
MPEG Surround is a digital encoding
system developed by the Motion Picture
Expert Group. Like Dolby Digital it provides
five full-frequency-range channels (left,
centre, right, left surround, right surround)
and an additional Low Frequency Effects
(LFE) channel.
MSR+
The Meridian System Remote.
OSD
On-screen display, which displays
information on status or setup on the video
output of a DVD player.
PCM
Pulse Code Modulation, the method used
to encode music digitally, as used on CDs
and DVDs.
Room correction
A system that uses digital signal processing
to analyse the room response and then
build a set of filters to compensate for
acoustic deficiencies.
Soft keys
The five keys on the front panel of G Series
products that change function according to
the labels on the bottom line of the display.
Source
An input to the system, such as CD or
TV. The Meridian G Series provides up to
12 named sources, corresponding to the
names of the 12 source keys on the MSR+.
Steered surrounds
Surrounds which have individual signals
steered to them by the digital surround
controller’s DSP preset.
Surround
A sound reproducing system with more
than two loudspeakers, and usually with
speakers behind or to the side of the
listener.
THX
Additional processing that follows Dolby
Pro Logic Surround decoding to give a
more faithful reproduction of cinema sound
in the home.
Trifield
A DSP preset designed to extract centre
and surround signals from a conventional
two-channel stereo source.