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Appendix
Dolby Digital Plus
Dolby Digital Plus is an improved Dolby Digital signal format that is
compatible with up to 7.1-channels of discrete digital sound and also
improves sound quality thanks to extra data bit rate performance. It is
upwardly compatible with conventional Dolby Digital, so it offers greater
flexibility in response to the source signal and the conditions of the
playback device.
Dolby Pro Logic
g
Dolby Pro Logic
g
is a matrix decoding technology developed by Dolby
Laboratories.
Regular music such as that on CDs is encoded into 5-channels to achieve
an excellent surround effect.
The surround channel signals are converted into stereo and full band
signals (with a frequency response of 20 Hz to 20 kHz or greater) to create
a “three-dimensional” sound image offering a rich sense of presence for
all stereo sources.
Dolby TrueHD
Dolby TrueHD is a high definition audio technology developed by Dolby
Laboratories, using lossless coding technology to faithfully reproduce the
sound of the studio master.
This format provides the facility to support up to 8 audio channels with a
sampling frequency of 96 kHz/24 bit resolution and up to 6 audio channels
with a sampling frequency of 192 kHz/24 bit resolution. Dolby TrueHD is
adopted for applications that put very high importance on sound quality.
Downmix
This function converts the number of channels of surround audio to
a lower number of channels and plays back according to the system’s
configuration.
DTS
This is an abbreviation of Digital Theater System, which is a digital audio
system developed by DTS.
DTS delivers a powerful and dynamic surround sound experience, and is
found in the world’s finest movie theaters and screening rooms.
DTS 96/24
DTS 96/24 is a digital audio format enabling high sound quality playback in
5.1-channels with a sampling frequency of 96 kHz and 24 bit quantization
on DVD-Video.
DTS Digital Surround
DTS Digital Surround is the standard digital surround format of DTS,
Inc., compatible with a sampling frequency of 44.1 or 48 kHz and up to
5.1-channels of digital discrete surround sound.
DTS Express
DTS Express is an audio format supporting low bit rates (max. 5.1-channels,
24 to 256 kbps).
DTS-HD
This audio technology provides higher sound quality and enhanced
functionality than the conventional DTS and is adopted as an optional audio
for Blu-ray Disc. This technology supports multi-channel, high data transfer
speed, high sampling frequency, and lossless audio playback. Maximum
7.1-channels are supported in Blu-ray Disc.
DTS-HD High Resolution Audio
DTS-HD High Resolution Audio is an improved version of the conventional
DTS, DTS-ES and DTS 96/24 signals formats, compatible with sampling
frequencies of 96 or 48 kHz and up to 7.1-channels of discrete digital sound.
High data bit rate performance provides high quality sound. This format is
fully compatible with conventional products, including conventional DTS
digital surround 5.1-channel data.
