Glossary; Audio Formats - Yamaha RX-V4600 Bedienungsanleitung

Audio formats

■ Dolby Digital
Dolby Digital is a digital surround sound system that gives
you completely independent multi-channel audio. It
provides 5 full-range audio channels; 3 front channels
(left, center, and right), and 2 surround stereo channels.
An additional channel especially for bass effects, called
LFE (low frequency effect) is also provided giving the
system a total of 5.1-channels (LFE is counted as a 0.1
channel). By using 2-channel stereo for the surround
speakers, more accurate moving sound effects and
surround sound environment are possible than with Dolby
Surround. The wide dynamic range (maximum to
minimum volume) reproduced by the 5 full-range
channels and the precise sound orientation generated
using digital sound processing provide listeners with a
previously unheard of excitement and realism.
■ Dolby Digital EX
Dolby Digital EX creates 6 full-bandwidth output
channels from 5.1-channel sources. This is done by using
a matrix decoder that derives 3 surround channels from
the 2 in the original recording. For best results, Dolby
Digital EX should be used with movie sound tracks
recorded with Dolby Digital Surround EX. With this
additional channel, you can experience more dynamic and
realistic moving sound especially with scenes that have
"flyover" and "fly-around" effects.
■ Dolby Pro Logic
Dolby Pro Logic is an improved technique used to
decode vast numbers of existing Dolby Surround
software. This new technology enables a 5-channel
playback with 2 front left and right channels, 1 center
channel, and 2 surround left and right channels (instead of
only 1 surround channel for conventional Pro Logic
technology). Music and Game modes are also available
for 2-channel sources in addition to the Movie mode.
■ Dolby Pro Logic x
Dolby Pro Logic x is a new technology enabling 6.1 or
7.1 multi-channel playback from 2-channel or multi-
channel sources. There is a Music mode for music, a
Movie mode for movies and a Game mode for games.

GLOSSARY

■ Dolby Surround
Dolby Surround uses a 4 channel analog recording system
to reproduce realistic and dynamic sound effects: 2 front
left and right channels (stereo), a center channel for dialog
(monaural), and a surround channel for special sound
effects (monaural). The surround 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.
■ DSD
Direct Stream Digital (DSD) technology stores audio
signals on digital storage media, such as Super Audio
CDs. Using DSD, signals are stored as single bit values at
a high-frequency sampling rate of approximately 2.8224
MHz, while noise shaping and oversampling are used to
reduce distortion, a common occurrence with very high
quantization of audio signals. Due to the a high sampling
rate, better audio quality can be achieved than that offered
by the PCM format used for normal audio CDs.
■ DTS 96/24
DTS 96/24 offers an unprecedented level of audio quality
for multi-channel sound on DVD-Video, and is fully
backward-compatible with all DTS decoders. "96" refers
to a 96 kHz sampling rate (compared to the typical 48 kHz
sampling rate). "24" refers to 24-bit word length.
DTS 96/24 offers sound quality transparent to the original
96/24 master, and 96/24 5.1-channel sound with
full-quality full-motion video for music programs and
motion picture soundtracks on DVD-video.
■ DTS (Digital Theater Systems)
Digital Surround
DTS digital surround was developed to replace the analog
soundtracks of movies with a 6-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
produces practically distortion-free 6-channel sound
(technically, left, right and center channels, 2 surround
channels, plus an LFE 0.1 channel as a subwoofer, for a
total of 5.1-channels). This unit incorporates a DTS-ES
decoder that enables 6.1- channel reproduction by adding
a surround back channel to the existing 5.1-channel
format.
GLOSSARY
111