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Dolby Pro Logic Surround
This unit employs a Dolby Pro Logic Surround decoder similar to
professional Dolby Stereo decoders used in many movie theaters. By
using the Dolby Pro Logic Surround decoder, you can experience the
dramatic realism and impact of Dolby Surround movie theater sound
in your own home. Dolby Pro Logic employs a four channel five
speaker system. The Pro Logic Surround system divides the input
signal into four levels: the left and right main channels, the center
channel (used for dialog), and the rear surround sound channels
(used for sound effects, background noise, and other ambient
noises). The center channel allows listeners seated in even less-
than-ideal positions to hear the dialog originating from the action on
the screen while experiencing good stereo imaging. Dolby Surround
is encoded on the sound track of pre-recorded video tapes, laser
discs, and some TV/cable broadcasts. When you play a source
encoded with Dolby Surround on this unit, the Dolby Pro Logic
Surround decoder decodes the signal and distributes the surround-
sound effects.
This Dolby Pro Logic Surround Decoder employs a digital signal
processing system. This system improves the stability of sound at
each channel and crosstalk between channels, so that positioning of
sounds around the room is more accurate compared with
conventional analog signal processing systems.
In addition, this unit features a built-in automatic input balance
control. This always assures you the best performance without
manual adjustment.
Dolby Surround AC-3
The built-in Dolby Surround AC-3 Decoder leads you into a
totally new sound experiences.
Dolby Surround AC-3 is a new generation of multi-channel
digital audio technology, or the newest spatial sound processing
format developed for 35 mm film-movies by employing a new kind
of low bit-rate audio coding.
Dolby Surround AC-3 is a digital surround sound system that
provides completely independent multi-channel audio to
consumers. In multi-channel form, Dolby Surround AC-3 provides
five full range channels in what is sometimes referred to as a “3/2”
configuration: three front channels (left, center and right), plus two
surround channels. A sixth bass-only effect channel is also
provided for output of LFE (low frequency effect), or low bass
effects that are independent of other channels. This channel is
counted as 0.1, thus giving rise to the term 5.1 channels in total.
Compared to Dolby Pro Logic that is referred to a “3/1” system
(left front, center, right front and just one surround channel), Dolby
Surround AC-3 features two surround channels, called stereo or
split surrounds, each offering the same full range fidelity as the
three front channels.
Sound of wide dynamic range reproduced by the five full range
channels presents listeners much excitement that has never been
experienced before. Precise sound orientation by the discrete
digital sound processing expands realism that the original movie
possesses.