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Glossary
Dolby Digital
Digital multi-channel audio standard developed by Dolby
Laboratories. It supports transmission and recording of high-
quality digital audio signals from monaural up to 5.1 channels
using an amount of data that is a fraction of the PCM audio
format. The main features of Dolby Digital include:
• Downmixing optimized for monaural, stereo and Pro Logic
configurations as well as for playback of 6.1-channel audio.
• Transfer of information related to the dynamic range and the
conversation level adjustment.
• Wide range of operating bit rates.
Dolby Digital EX/Dolby EX
These extensions of Dolby Digital add the surround back channel
to the Dolby Digital channels to deliver a surround effect with
enhanced presence and listener envelopment.
Dolby Pro Logic II
This is a matrix decoding technology developed by Dolby
Laboratories. It generates 5-channel surround audio with
rich feeling of presence from any stereo source, delivering an
excellent multidimensional sound field effect even from an
ordinary stereo music content including CD music. It offers three
modes including the Movie mode optimized for movie playback,
the Music mode for music playback and the Game mode for
game play.
Dolby Pro Logic IIx
Matrix decoding technology developed by improving Dolby
Pro Logic II. It accepts any stereo or 5.1-channel audio input
and generates 7.1-channel surround audio with a more natural,
smoother surround sound field. It also offers three modes
optimized for each source content, including the Movie mode
for movie playback, the Music mode for music playback and the
Game mode for game play.
Dolby Pro Logic IIz
Dolby Pro Logic IIz adds front height channels to surround sound,
creating a 7.1 playback system for home music, movies, and video
games.
Dolby Pro Logic IIz brings enhanced spatial effects, added depth,
and an overall airiness to the listening experience.
Dolby Digital Plus
This is an audio technology developed based on Dolby Digital by
improving both the sound quality and functions. It delivers multi-
channel surround audio with completely discrete channels. The
compatible bit rates have been expanded to between 32 kbps
and 6 Mbps from between 96 and 640 kbps with Dolby Digital.
The excellent coding efficiency makes this technology capable
of delivering quality audio in max. 7.1 channels without
affecting the bit rates assigned for the video and other services.
Compatibility with existing home theater systems incorporating
the Dolby Digital technology is also secured.
Dolby TrueHD
This loss-less (reversible) audio technology has been developed
by Dolby Laboratories and reproduces high-quality studio-
mastered audio data perfectly with bit-order accuracy. It is
compatible with up to 7.1 channels when the sampling frequency
is 95 kHz and up to 5.1 channels when the sampling frequency is
192 kHz.
Dolby Virtual Speaker
This is a speaker virtual technology that can generate an ideal
5.1-channel home theater environment using only a pair of
speakers.
DTS Digital Surround
Digital surround format developed by DTS Corporation. It
features low compression rate and high sound quality, and is
capable of reproducing max. 5.1 channels.
DTS-ES
This is a 6.1-channel audio technology developed by adding the
surround back channel to DTS Digital Surround.
The signal of this format can also be played on existing DTS
5.1-channeel components. DTS-ES consists of two types, which
are DTS ES Matrix and DTS-ES Discrete 6.1.
DTS-ES Matrix
With this format, the audio for the surround back channel added
to the DTS 5.1-channel audio is allocated to the two surround
channels during recording. When the signal is decoded, the audio
for the surround back channel is restored from the surround
channels to deliver the 6.1-channel audio.
DTS-ES Discrete
With this format, the audio for the surround back channel added
to the DTS 5.1-channel audio is recorded in an independent
channel.
DTS Neo:6
This is a matrix decoding technology developed by DTS
Corporation, capable of delivering max. 6.1 channels from any
2-channel source. It includes two modes, including the DTS Neo 6
CINEMA mode optimized for movie playback and the DTS Neo 6
MUSIC mode optimized for music playback.
DTS 96/24
5.1-channel digital audio format developed as an evolution of the
DTS 5.1-channel format. It enables high-quality playback with 96
kHz sampling frequency and 24-bit quantization (the signal of
this format can also be reproduced on existing DTS 5.1-channel
player components).
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