Glossary - Yamaha AV-S77 Bedienungsanleitung

APPENDIX
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
Dolby Surround uses a four analog channel recording
system to reproduce realistic and dynamic sound effects:
two left and right main channels (stereo), a center channel
for dialog (monaural), and a rear channel for special sound
effects (monaural). The rear channel reproduces sound
within a narrow frequency range.
Dolby Surround is widely used with nearly all video tapes
and laser discs, and in many TV and cable broadcasts as
well. The Dolby Pro Logic decoder built into this unit
employs a digital signal processing system that
automatically stabilizes the volume on each channel to
enhance moving sound effects and directionality.
I Dolby Digital
Dolby Digital is a digital surround sound system that gives
you completely independent multi-channel audio. With
three front channels (left, center and right), and two rear
stereo channels, Dolby Digital provides five full-range
audio channels. With an additional channel especially for
bass effects, called LFE (low frequency effect), the system
has a total of 5.1 channels (LFE is counted as 0.1 channel).
Using two-channel stereo for the rear speakers, more
accurate moving sound effects and surround sound
environment are possible than with Dolby Surround. The
wide dynamic range (from maximum to minimum volume)
reproduced by the five full-range channels and the precise
sound orientation generated using digital sound processing
provide listeners with previously unheard of excitement and
realism.
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GLOSSARY

With this unit, any sound environment from monaural up to
a 5.1-channel configuration can be freely selected for your
enjoyment.
I DTS (Digital Theater Systems)
Digital Surround
DTS digital surround was developed to replace the analog
soundtracks of movies with a six-channel digital sound
track, and is now rapidly gaining popularity in movie
theaters around the world. Digital Theater Systems Inc. has
developed a home theater system so that you can enjoy the
depth of sound and natural spatial representation of DTS
digital surround in your home. This system is a practically
distortion-free, clear 6-channel sound (technically, a left,
right and center channels, two rear channels, plus an LFE
0.1 channel as a subwoofer, for a total of 5.1 channels).
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 CINEMA DSP
Since the Dolby Surround and DTS systems were originally
designed for use in movie theaters, their effect is best
achieved in a theater with many speakers designed for
acoustic effects. Since home conditions, such as room size,
wall material, number of speakers, and so on, can differ so
widely, it's inevitable that there are differences in the sound
heard as well. Based on a wealth of actually measured data,
YAMAHA CINEMA DSP uses YAMAHA original sound
field technology to combine Dolby Pro Logic, Dolby Digital
and DTS systems to provide the visual and audio experience
of movie theater in the listening room of your own home.
I SILENT CINEMA
YAMAHA has developed a natural, realistic sound effect
DSP algorithm for headphones.
Parameters only for headphones have been set so that
accurate representations of the sounds can be enjoyed on
headphones.
D I G I T A L