Dolby Digital EX
Dolby Digital EX is a 6.1-channel surround format from Dolby Laboratories
that allows users to enjoy in their homes the “DOLBY DIGITAL SURROUND
EX” audio format jointly developed by Dolby Laboratories and Lucasfilm.
The 6.1-channels of sound, including surround back channel, provide
improved sound positioning and expansion of the surround sound field.
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 oers 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 eect.
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 oering a rich sense of presence for
all stereo sources.
Dolby Pro Logic gx
Dolby Pro Logic gx is a further improved version of the Dolby Pro Logic g
matrix decoding technology.
Audio signals recorded in 2-channels are decoded to achieve a natural
sound with up to 7.1-channels.
There are three modes: “Music” suited for playing music, “Cinema”
suited for playing movies, and “Game” which is optimized for playing
games.
Dolby Pro Logic gz
Dolby Pro Logic gz introduces a new dimension to Home Entertainment
through the addition of a pair of front height channels. Compatible with
stereo, 5.1-channel and 7.1-channel content, Dolby Pro Logic gz provides
enhanced spaciousness, depth and dimension to movies, concert video
and video game playback while maintaining the full integrity of the source
mix.
Dolby Pro Logic gz identifies and decodes spatial cues that occur naturally
in all content, directing this information to the front height channels,
complementing the performance of left and right surround sound
speakers. Content that is encoded with Dolby Pro Logic gz height channel
information can be even more revealing, with perceptually discrete
height channel information bringing an exciting new dimension to home
entertainment.
Dolby Pro Logic gz, with front height channels is also an ideal alternative
for households that cannot support the placement of back surround
speakers of a typical 7.1-channel system but may have bookshelf space
available to support the addition of height speakers.
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.
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