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Glossary
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Dolby Digital Plus
Dolby Digital Plus is an advanced audio technology
developed for high-definition programming and media
including HD broadcasts, HD DVD, and Blu-ray Disc.
Selected as a mandatory audio standard for HD DVD and
as an optional audio standard for Blu-ray Disc, this
technology delivers multichannel sound with discrete
channel output. Supporting bitrates up to 6.0 Mbps, Dolby
Digital Plus can carry up to 7.1 discreet audio channels
simultaneously. Supported by HDMI version 1.3 and
designed for the optical disc players and AV receivers/
amplifiers of the future, Dolby Digital Plus also remains
fully compatible with the existing multichannel audio
systems that incorporate Dolby Digital.
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Dolby Pro Logic II
Dolby Pro Logic II is an improved technique used to
decode vast numbers of existing Dolby Surround sources.
This new technology enables a discrete 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. There are three modes available: “Music
mode” for music sources, “Movie mode” for movie
sources and “Game mode” for game sources.
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Dolby Pro Logic IIx
Dolby Pro Logic IIx is a new technology enabling discrete
multi-channel playback from 2-channel or multi-channel
sources. There are three modes available: “Music mode”
for music sources, “Movie mode” for movie sources (for
2-channel sources only) and “Game mode” for game
sources.
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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.
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Dolby TrueHD
Dolby TrueHD is an advanced lossless audio technology
developed for high-definition disc-based media including
HD DVD and Blu-ray Disc. Selected as a mandatory
audio standard for HD DVD and as an optional audio
standard for Blu-ray Disc, this technology delivers sound
that is bit-for-bit identical to the studio master, offering a
high-definition home theater experience. Supporting
bitrates up to 18.0 Mbps, Dolby TrueHD can carry up to 8
discrete channels of 24-bit/96 kHz audio simultaneously.
Supported by HDMI version 1.3 and designed for the
optical disc players and AV receivers/amplifiers of the
future, Dolby TrueHD also remains fully compatible with
the existing multichannel audio systems and retains the
metadata capability of Dolby Digital, allowing dialog
normalization and dynamic range control.
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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 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 high sampling
rate, better audio quality can be achieved than that offered
by the PCM format used for normal audio CDs.
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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.
