JVC RX-D412B 用户手册

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页码 60
Creating realistic 
sound fields
Reproducing theater ambience
In a movie theater, many speakers are located on the walls to 
reproduce impressive multi-channel sound, reaching you from 
all directions.
With these many speakers, sound localization and sound 
movement can be expressed.
Surround/DSP modes built in this receiver can create almost 
the same Surround sound as you can feel in a real movie 
theater.
Introducing the Surround modes
7 Dolby Digital*
Dolby Digital is a digital signal compression method, 
developed by Dolby Laboratories, and enables multi-channel 
encoding and decoding.
•  When Dolby Digital signal is detected through the digital 
input, the 
 indicator lights up on the display.
Dolby Digital 5.1CH
Dolby Digital 5.1CH (DOLBY DIGITAL) 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.
Dolby Digital EX
Dolby Digital EX (DOLBY D EX) is a digital surround encoding 
format that adds the third surround channels, called “surround 
back.”
Compared to the conventional Dolby Digital 5.1CH, these 
newly added surround back channels can reproduce more 
detailed movements behind you while viewing the video 
software. In addition, surround sound localization will become 
more stable.
7 Dolby Surround
Dolby Pro Logic II
Dolby Pro Logic II is a multi-channel playback decoder 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 receiver provides three types of Dolby Pro Logic II 
modes—Pro Logic II Movie (PLII MOVIE), Pro Logic II Music 
(PLII MUSIC), and Pro Logic II Game (PLII GAME).
When Dolby Pro Logic II is activated, the 
 indicator 
lights up on the display.
PLII MOVIE
Suitable for playing any Dolby Surround 
encoded software. You can enjoy a sound field 
very close to the one created with discrete 5.1-
channel sounds.
PLII MUSIC
Suitable for playing any 2-channel stereo 
software. You can enjoy wide and deep 
sounds.
PLII GAME
Suitable for when playing a video game. You 
can enjoy sounds with “being there” feeling.
*  Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic”, and the double-D symbol are 
trademarks of Dolby Laboratories.
Continued on the next page
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