JVC KD-AV7000 - Manual (Page 218)

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Introducing surround/DSP mode
Surround modes
Dolby Digital
Dolby Digital is a digital signal compression
method, developed by Dolby Laboratories, and
enables multi-channel encoding and decoding
(1ch up to 5.1ch).
Dolby Digital 5.1 CH
Dolby Digital 5.1 CH encoding method records
and digitally compresses the left front channel,
right front channel, center channel, left
surround channel, right surround channel, and
LFE channel signals (total 6 channels, but the
LFE channel is counted as 0.1 channel.
Therefore, called 5.1 channel).
Dolby Digital enables stereo surround sounds,
and sets the cutoff frequency of the surround
treble at 20 kHz, compared to 7 kHz for Dolby
Pro Logic. As such, the sound movement and
“being there” feeling are enhanced much more
than Dolby Pro Logic.
DTS
DTS is another digital signal compression
method, developed by Digital Theater Systems,
Inc., and enables multi-channel encoding and
decoding (1ch up to 6.1ch).
DTS Digital Surround
DTS Digital Surround is another discrete
5.1-channel digital audio format available on
CD, LD, and DVD software.
Compared to Dolby Digital, the DTS Digital
Surround format has a lower audio compression
rate which enables it to add breadth and depth
to the sounds reproduced. As such, DTS Digital
Surround features natural, solid, and clear
sound.
Dolby Pro Logic II
It is a multi-channel playback format to convert
2-channel software into 5-channel (plus
subwoofer). The matrix-based conversion
method used for Dolby Pro Logic II makes no
limitation for the cutoff frequency of the
surround treble and enables stereo surround
sound.
• This unit provides two types of Dolby Pro
Logic II modes—Pro Logic II “MOVIE” and
Pro Logic II “MUSIC.”
MOVIE: Suitable for playing any Dolby
Surround encoded software.
MUSIC: Suitable for playing any 2-channel
stereo software.
No sound may come out of the subwoofer
(though the subwoofer is activated) with
Dolby Pro Logic II in use. (This depends on
your speaker setting—see page 51).
Digital Signal Processor (DSP) mode—
reproducing the sound field
The sound heard in a concert hall, club, etc.
consists of direct sound and indirect sound—
early reflections and reflections from behind.
Direct sounds reach the listener directly without
any reflection. On the other hand, indirect
sounds are delayed by the distances of the
ceiling and walls. These direct sounds and
indirect sounds are the most important elements
of the acoustic surround effects.
DSP modes can create these important elements,
and give you a real “being there” feeling.
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