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Glossary
■ 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.
■ 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.
■ 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.
■ 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.
■ 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.
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■ DTS Digital Surround
DTS digital surround was developed to replace the analog
soundtracks of movies with a 6.1-channel digital sound
track, and is now rapidly gaining popularity in movie
theaters around the world. DTS, 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, front left and
right, center, surround left and right, and LFE 0.1
(subwoofer) channels for a total of 5.1 channels). This unit
incorporates a DTS-ES decoder that enables 6.1-channel
reproduction by adding the surround back channel to the
existing 5.1-channel format.
■ DTS Express
DTS Express is an advanced audio technology for the
optional feature on Blu-ray Disc or HD DVD, which
offers high-quality, low bit rate audio optimized for
network streaming, and Internet applications. DTS
Express is used for the Secondary Audio feature of Blu-
ray Disc or the Sub Audio feature of HD DVD. These
features deliver audio commentaries (for example, the
additional commentaries made by the director of a film)
on demand by the users via the Internet, etc. DTS Express
signals are mixed down with the main audio stream on the
player component, and the component sends the mixed
audio stream to the AV receivers/amplifiers via digital
coaxial, digital optical, or analog connections.
■ DTS-HD High Resolution Audio
DTS-HD High Resolution Audio is an high resolution
audio technology developed for high-definition disc-based
media including HD DVD and Blu-ray Disc. Selected as
an optional audio standard for both HD DVD and Blu-ray
Disc, this technology delivers sound that is virtually
indistinguishable from the original, offering a high-
definition home theater experience. Supporting bitrates up
to 3.0 Mbps for HD DVD and 6.0 Mbps for Blu-ray Disc,
DTS-HD High Resolution Audio can carry up to 7.1
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, DTS-HD High Resolution Audio also remains
fully compatible with the existing multichannel audio
systems that incorporate DTS Digital Surround.
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