Glossary - Yamaha TSS-10 Owner's Manual

Home theater sound system
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I Encode/Decode
When a signal or other information is processed,
compressed and digitized, this is called encoding.
Encoding can be used to record an extremely large
amount of information on a single CD or DVD.
An encoded signal cannot be listened to directly. It must
be returned to its original state (i.e. audible sound) and
this is called decoding.
I Sound field
Not all sound travels from the sound source directly into
the human ear, but instead reflects off of walls, ceilings
and other objects to arrive at the ear slightly delayed
(early reflection). It may also reflect repeatedly in a
complicated manner before reaching the ear (subsequent
reverberation). A human is able to perceive the size and
shape of a location based on the various sounds heard in
this way. The specific acoustic space of a particular
building is called a sound field.
I Dolby Surround
In movie theaters and in live theaters, the spectators are
surrounded by many speakers and sound effects geared to
each scene are used to make sound move from front to
back and right to left. This gives the sound a three
dimensional feel that surrounds the entire body. Dolby
Surround is used to implement this realistic effect.
Originally, the Dolby Surround system consisted of a total
of four channels: two front channels (right and left), one
center channel, and one rear channel. Later, two-channel
stereo compatibility was added to for broadcast and video
media used in the home. The ability to easily set up a
home AV system capable of stereo reproduction is one of
the biggest features of Dolby Surround.
I Dolby Pro Logic II
Dolby Pro Logic II is an improved technique used to
decode vast numbers of existing Dolby Surround
software. This new technology enables a discrete 5-
channel playback with 2 front channels, 1 center channel,
and 2 rear channels (instead of only 1 rear channel for
conventional Pro Logic technology). A music mode is
also available for 2-channel sources in addition to the
movie mode.
I Dolby Digital
Dolby Digital consists of a total of five channels: three
front channels (left, center and right) and two rear
channels (right and left), plus a distinct LFE channel for
low frequency effect. It is therefore commonly referred to
as a 5.1 channel system. Using digital compression
technology for all 5.1 channels, Dolby Digital can be used
for completely independent audio reproduction. Dolby
Digital offers superior sound separation between each
channels and a more three dimensional surround effect in
comparison to the older Dolby Surround, which mixes
four channels (three front and one rear) into two-channel
stereo and separates them using a matrix circuit.
16

GLOSSARY

I DTS (Digital Theater Systems)
Digital Surround
DTS was developed to replace the analog soundtracks of
movies with six discrete channels of digital soundtracks,
and it is now installed in many theaters around the world.
The DTS digital playback system changed the way we
experienced movies in theaters with six discrete channels
of superb digital audio.
DTS technology, through intense research and
development has made it possible to deliver similar
encode/decode discrete technology to home audio
surround-sound entertainment.
DTS Digital Surround is an encode/decode system which
delivers six channels of master-quality, 20-bit audio;
technically, it is 5.1 channels, which means 5 full-range
(left, center, right and two surround) channels, plus a
subwoofer (LFE) channel (as "0.1"). It is compatible with
the 5.1 speaker configurations that are currently available
for home theater systems.
I LFE 0.1 channel
This channel is for the reproduction of low bass signals.
The frequency range for this channel is 20 Hz to 120 Hz.
This channel is counted as 0.1 because it only enforces a
low frequency range compared to the full-range
reproduced by the other 5 channels in a Dolby Digital or
DTS 5.1 channel systems.
I SILENT CINEMA
YAMAHA has developed a natural, realistic sound effect
DSP algorithm for headphones.
Parameters for headphones have been set for each
surround mode so that accurate representations of all the
surround modes can be enjoyed using headphones.

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