14
DIGITAL AUDIO CONNECTIONS
Digital Audio Connections
Notes when connecting the opti-
cal digital audio cable (optional)
■
Remove the dust protection cap from the
optical digital audio output and connect the
cable firmly so that the configurations of both
the cable and the connector match.
■
Keep the dust protection cap and always
reattach the cap when not using the connec-
tor.
Audio output from the unit’s
optical/coaxial digital audio out-
put connector
*
1
Digital Audio Output (see page 21) selected
”Dolby Digital” or ”PCM”.
*
2
Digital Audio Output selected ”DTS” or other
(see page 21).
For your reference:
■
Dolby Digital (AC-3) is a digital sound com-
pression technique developed by the Dolby
Laboratories Licensing Corporation,
supporting 5.1-channel surround sound, as
well as stereo (2-channel) sound, this tech-
nique enables a large quantity of sound data
to be efficiently recorded on a disc.
■
Linear PCM is a signal recording format used
in CDs. While CDs are recorded in
44.1 kHz/16 bit, DVDs are recorded in
48 kHz/16 bit up to 96 kHz /24 bit.
■
If you have a Dolby Pro Logic Surround
decoder connected to the DVD 20’s analog
AUDIO OUT connectors, thanks to the
"Downmix" function of the DVD 20 you will
obtain the full benefit of Pro Logic from the
same DVD movies that provide full 5.1-chan-
nel Dolby Digital soundtracks, as well as from
titles encoded with Dolby Surround.
Caution for the optical/coaxial
digital audio outputs:
■
When connecting an amplifier (with an opti-
cal/coaxial digital input ) which does not con-
tain a Dolby Digital (AC-3) or DTS decoder, be
sure to select “PCM” as initial setting in the
“Digital Audio Output” menu (see also page
21).
Otherwise, any attempt to play DVD may
cause such a high level of noise that it may
be harmful to your ears and damage your
speakers.
■
CD´s can be played as they would normally be
played.
Notes:
■
Some first generation DTS decoders which do
not support DVD-DTS interface may not work
properly with the DVD/CD player.
Manufactured under license from Dolby
Laboratories. “Dolby” and the double-D symbol
are trademarks of Dolby Laboratories.
Confidential Unpublished Works.1992-1997
Dolby Laboratories, Inc. All rights reserved.
Dolby Digital and DTS
Both Dolby Digital and DTS are audio formats
used to record 5.1-channel audio signals onto
the digital track of film. Both of these formats
provide six separate channels: left, right, center,
left rear, right rear, and common subwoofer.
Remember, that Dolby Digital or DTS will only
play 5.1-channel sound if you’ve connected the
optical or coaxial output of the DVD 20 to a DTS
or Dolby Digital receiver or decoder (see page
11) and if the disc was recorded in the Dolby
Digital or DTS format.
Dolby Digital is a trademark of Dolby Laboratories
Licensing Corporation.
DTS is a registered trademark of Digital Theater
Systems.
Disc:
DVD
CD
Sound recording
format:
Dolby Digital
(AC-3)
Linear PCM
(48/96 kHz
16/20/24bit)
DTS
Linear PCM
Optical/Coaxial digital
audio output
Dolby Digital bitstream
(2-5.1 ch) or PCM
(2 ch, 48 KHz/16bit)*
1
Linear PCM (2 ch)
(48/96 kHz
16/20/24bit)
Bitstream or no
output *
2
Linear PCM (44.1 kHz
sampling)