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Dolby Digital Plus
Dolby Digital
Plus is an extension to the Dolby Digital
format, taking Dolby Digital's
5.1-channel surround sound
format to 7.1-channel. The two additional channels are for
surround back channels, which are placed directly behind the audience.
This format is backwards compatible with Dolby Digital processors and uses
the optical or coaxial digital outputs.
To take advantage of Dolby Digital Plus surround sound, you must have either:
(1) Dolby Digital decoder in the DVD player and a "Dolby Digital ready"
AV receiver
or pre-amplifier, or
(2) Dolby Digital AV receiver or pre-amplifier and use the DVD player's digital audio output
(either optical or coaxial).
(This option is generally better since it
allows the DVD player to pass the raw digital audio signal to the
receiver or
pre-amplifier, which theoretically
is less subject to interference and degradation.)
Also see: Dolby Digital, Surround Sound
Formats page for a full explanation,
Dolby Pro Logic IIz, THX
Surround EX, DTS Digital Surround
Additional Information and References: Dolby's
Dolby Digital
Plus home page
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