JBL DVD280 User Manual

Page 21

DIGITAL AUDIO

Optical Digital Audio
Connection Notes

• 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 connector.

Audio Output From the Unit’s
Optical/Coaxial Digital Audio
Output Connector

Disc: Sound Optical/coaxial

recording

digital audio

format:

output:

DVD Dolby

Dolby Digital

Digital

bitstream
(2–5.1ch) or
PCM (2ch,
48kHz, 16-bit)

††

Linear PCM Linear PCM
(48/96kHz, (2ch)

(48/96kHz,

16/20/24-bit) 16/20/24-bit)

DTS

Bitstream or no
output

††

MPEG (2.0) MPEG

bitstream (2ch)
or linear PCM
(2ch, 48kHz)

VCD MPEG-1

Linear PCM

††

CD-DA

Linear PCM Linear PCM

(44.1kHz
sampling)

MP3 Linear

PCM

(MPEG-1

(44.1–48kHz,

Audio

depending on

Layer 3)

source, if digital
output format
selected as
“Original”).
(48kHz if digital
output format
selected as
“PCM”)

WMA

Linear PCM

(Windows

(32–48kHz)

Media
Audio)

††

Digital output format must be
selected as “Original” or “PCM”
in Audio submenu (see page 25).

For Your Reference:

• Dolby Digital 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 technique
enables a large quantity of sound
data to be efficiently recorded
on a disc.

• DTS is another digital audio technol-

ogy developed by Digital Theater
Systems, Inc. It supports 5.1 and 6.1
digital surround sound, depending
on the specific disc, thanks to a
sophisticated encoding system.
Some receivers and processors also
feature DTS-ES

and DTS Neo:6

matrix decoders that may be used
with DTS 5.1 discs to derive the sur-
round back channel.

• Linear PCM is a signal recording

format used in CDs. While CDs are
recorded in 44.1kHz/16-bit, DVDs
are recorded in 48kHz/16-bit, up
to 96kHz/24-bit.

• If you have a Dolby Pro Logic

Surround decoder connected to the
DVD280’s analog audio out connec-
tors, thanks to the “Downmix” func-
tion of the DVD280, you will obtain
the full benefit of Pro Logic from
the same DVD movies that provide
full 5.1-channel Dolby Digital sound-
tracks, as well as from titles encoded
with Dolby Surround.

• The DVD280 is designed to digitally

output 96kHz PCM audio with a
96kHz sampling rate. The 96kHz
indication will appear in the Disc
Information on-screen display. See
page 37. However, some 96kHz
DVDs may include copy protection
codes that do not permit digital out-
put. For full 96kHz fidelity from these
discs, use the analog outputs of the
DVD280. If your surround processor
converter does not support 96kHz
PCM audio, you must use the
DVD280 analog outputs for full
96kHz fidelity with these discs.

• When connecting an amplifier (with

an optical/coaxial digital input) that
does not contain a Dolby Digital or
DTS decoder, be sure to select
PCM as the initial setting in the
Digital Output menu (see page 18).
Otherwise, any attempt to play DVDs
may cause such a high level of

noise that it may be harmful to your
ears and damage your speakers.

• CDs can be played as they would

normally be played.

NOTE: Some first-generation DTS
decoders that do not support DVD-
DTS interface may not work properly
with the DVD/CD player.

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 sub-
woofer.

The latest discs may include the 6.1-
channel formats, such as Dolby
Digital EX and DTS-ES

Discrete.

These formats add an additional
surround back channel behind the
listener to create an even more
realistic sense of envelopment.

Remember that Dolby Digital or DTS
will only play 5.1- or 6.1-channel
sound if you’ve connected the optical
or coaxial output of the DVD280 to
a DTS or Dolby Digital receiver or
decoder (see page 19) and if the disc
was recorded in the Dolby Digital or
DTS format.

DVD280 OM 7/12/04 4:41 PM Page 21