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Dolby Pro Logic and Dolby 3 Stereo
Dolby Surround encoding format records the left front channel,
right front channel, center channel, and rear channel signals (total 4
channels) into 2 channels.
The Dolby Pro Logic decoder built in this system decodes these 2
channel signals into original 4 channel signals—matrix-based
multichannel reproduction, and allows you to enjoy a realistic stereo
sound in your listening room.
When one of Dolby Surround is selected, the PRO LOGIC indicator
lights up on the display.
Indications on the display for each surround
• Dolby Digital
• DTS Digital Surround
• Dolby Pro Logic
• Dolby 3 Stereo
• DSP*
* When you select FM/AM or AUX as the source, the Linear
PCM indicator (
) does not light up.
– According to the speaker settings, some speaker indicators do
not light up. In this case, set the speaker setting appropriately.
Creating Realistic Sound Fields
You can use the following surround to reproduce a realistic sound
field.
• Digital Multichannel Surround—Dolby Digital and DTS Digital
Surround
• Dolby Surround
• DSP (Digital Signal Processor) modes
■ Dolby Digital and DTS Digital Surround
To enjoy surround effectively, all the speakers need to be
connected and activated.
Dolby Digital*
Used to reproduce multichannel sound tracks of the software
encoded with Dolby Digital (
).
Dolby Digital encoding method (so-called discrete 5.1 channel
digital audio format) records and digitally compresses the left front
channel, right front channel, center channel, left rear channel, right
rear channel, and LFE channel signals (total 6 channels, but LFE
channel is counted as 0.1 channel. Therefore, called 5.1 channel).
Since each channel is completely independent from the other
channel signals to avoid interference, you can obtain much better
sound quality with much stereo and surround effects.
In addition, Dolby Digital enables stereo rear sounds, and sets the
cutoff frequency of the rear treble at 20 kHz, compared to 7 kHz for
Dolby Pro Logic. These facts enhance the sound movement and
being-there feelings much more than Dolby Pro Logic.
When the system detects Dolby Digital signals, the DOLBY
DIGITAL indicator lights up on the display.
DTS Digital Surround**
Used to reproduce multichannel sound tracks of the software
encoded with 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, audio compression rate is relatively low.
This fact allows DTS Digital Surround format to add breadth and
depth to the reproduced sounds. As a result, DTS Digital Surround
features natural, solid and clear sound.
When the system detects DTS Digital Surround signals, the DTS
indicator lights up on the display.
■ Dolby Surround*
Used to reproduce sound tracks of the VCR tapes encoded with
Dolby Surround (
DOLBY SURROUND
).
This is only used for the sound sources coming through the AUX IN
jacks.
**
Manufactured under license from Digital Theater Systems, Inc. US
Pat. No. 5,451,942 and other world-wide patents issued and
pending. “DTS” and “DTS Digital Surround” are trademarks of
Digital Theater Systems, Inc. ©1996 Digital Theater Systems, Inc.
All rights reserved.
*
Manufactured under license from Dolby Laboratories. “Dolby,” “Pro
Logic,” and the double-D symbol are trademarks of Dolby
Laboratories. Confidential Unpublished Works. ©1992–1997 Dolby
Laboratories. All rights reserved.
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