Digital picture formats, Digital picture formats digital audio – Panasonic TU-DST50 User Manual
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I
nformation
on
D
igital
T
elevision
Digital Picture Formats
Digital Audio
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*'^
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 i/60**^
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.
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 Confidential Unpublished Works.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.