Sony STR-V555ES - Glossary; Surround sound; Dolby Digital (AC-3); Digital Cinema Sound

Glossary
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Surround sound
Sound that eonsists of three eleinents:
direct sound, early reflected sound
(early reflections) and reverberative
sound (reverberatimg. Tile acoustics
of tile surrounding space affect tile
way these three sound elements are
heard. Surround sound eoinbines
these sound elements in such a way
that you actually can sense tile size of
the venue, as well as its type.
•Typesof sound
Reverberation
• Transition of sound from rear speakers
Direct sound
Level
Early
reflections
Reverberation
Early reflection time
Time
Dolby Pro Logic Surround
As one method of decoding Dolby
Surround, Dolhy Pro Logic Surround
produces four channels fi'om two-
channel sound. Compared with the
forlner Dolhy Surround system,
Dolby Pro Logic Surround reproduces
left to-right panning more naturally
and localizes sounds more precisely.
To take flfll advantage of Dolby Pro
Logic Surround, you should have one
pair of rear speakers and a center
speaken Tile rear speakers output
monaural sound.
Dolby Digital (AC-3)
This sound fin'mat for movie theaters
is more advanced than Dolby Pro
Logic Surround. In this fi)rmat, tile
rear speakers output stereo sound
with an expanded fi'equency range
and a sub woofer channel fin" deep
[)ass is independently provided. This
format is also called "5.1" because the
sub woofer channel is counted as 0.1
channel (since it f\mctions only when
a deep [)ass efIect is needed). All six
channels in this fin'mat are recorded
separately to realize superior channel
separation. Furthermore, since all tile
signals are processed digitally, less
signal degradation occurs. The name
"AC 3" comes from tile fact that it is
the third audio coding method to be
developed by the Dolby Laboratories
Licensing Corporation.
Digital Cinema Sound
This is the generic name of the
surround sotmd produced by digital
signal processing technology
developed by Sony. Unlike previous
surround strand fields inainly
directed at the reproduction of nmsic,
Digital Cineina Sound is designed
specifically for tile enjoyment of
inovies.
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