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INFORMATION
ON DIGITAL
TELEVISION
Digital Picture Formats
DTV supports eighteen (18) Advanced Television Systems Committee (ATSC)" display
formats, which are variations of the four (4) following formats: 1080i (interlaced), 720p
(progressive),
480p
(progressive)
and 480i (interlaced).
The larger the number, the
higher the resolution of the picture.
Interlaced
Scan
For interlaced
pictures,
the odd number
lines (picture
information)
are scanned,
creating field 1, then the even number lines are scanned,
creating field 2.
The two
fields are interlaced to provide the entire image (one frame).
This process takes
1/30 tb
of a second and is invisible to the human eye.
Progressive
Scan
For progressive
pictures, all lines in an entire frame are scanned sequentially
in
1/60 th
of a second. With progressive scan, you will generally not see the thin black horizontal
scan lines (venetian
blind effect) associated
with an interlaced picture.
Digital Audio
For all HDTV formats,
Dolby**
Digital surround sound
(also commonly
referred
to as
AC-3**
or DD 5.1) is the audio standard.
AC-3
will provide
CD-quality
sound.
The
system
provides
3 separate
audio channels
for the front speakers
(left, center, right), 2
channels
for the rear surround
sound
speakers,
plus
one channel
for subwoofer
sound.
You will
need
an external
audio
system
capable
of decoding
the AC-3
encoded
sound
to get the full surround
sound effect.
Otherwise,
it can be connected
directly to your TV or audio system
using only the stereo (left/right)
audio outputs.
Note:
The stereo audio outputs are Dolby Surround compatible.
You can connect a Dolby
Surround Pro Logic** decoder (not included) to the stereo audio outputs and receive
surround sound.
*The ATSC is responsible for digital television development and standards.
**Manufactured
under license from Dolby Laboratories.
"Dolby", "AC-3", "Pro Logic" and the double-D
symbol are trademarks of Dolby Laboratories.
Confidential Unpublished Works. ©1992-1997 Dolby Labo-
ratories, Inc. All rights reserved.
[]
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