Panasonic DVD-L50PM User Manual
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Picture type (i/P/B)
Dolby Digitai (AD-3)
The MPEG 2 standard adopted for DVD
uses the following 3 picture types for the
coding of each picture (frame) on the
screen.
I: l-Picture (intra coded picture)
This is the standard picture type, and
each picture is coded separately. Since it
features the best picture quality, it is rec
ommended that the screen be frozen with
l-Picture when the picture quality is to be
adjusted.
P: P-Picture (Predictive coded picture)
This picture type is computed on the
basis of a past l-Picture or P-Picture.
B; B-Picture (Bidirectionally-predictive
coded picture)
This picture type is computed by compar
ing the previous and subsequent l-Picture
or P-Picture. It has the lowest volume of
information.
General Picture type
Predict
Digital audio output connector
The digital audio output connector (opti
cal) converts electrical signals into optical
signals and transfers them to the amplifi
er. Consequently, it has a number of fea
tures including its immunity from electrical
interference from external sources and its
ability to prevent the generation of noise
and its minima! effect on the external en
vironment.
Dolby Digital (AC-3) Is a digital sound
compression technique developed by the
Dolby Laboratories, Inc.
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.
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Unpublished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 Laboratories, Inc.
All rights reserved.
Dolby Pro Logic Surround decoder
This is a unit which uses the Dolby
Surround (Pro Logic) system to restore
4-channel signals which were recorded
on 2 channels back to the signals of
4 separate channels during playback.
Compared
with
Dolby
Digital
(AC-3)/
5.1 channel surround sound, the channel
separation is not as good and surround
signals can be reproduced only up to a
frequency of 7 kHz.
dts (digital theater systems)
The digital theater systems (dts) is a 5.1-
channel surround sound system, which is
widely used in movie theaters around the
world. It allows the bit rate to be in
creased in order to provide good sound
quality without excessively compressing
the data.
Linear PCM audio (LPCM)
This refers to a signal recording format
used in a CD.
While a CD is recorded in 44.1 kHz/16 bit,
a DVD is recorded in 48 kHz/16 bit up to
96 kHz/24 bit, thus achieving higher quali
ty audio than that of a CD.
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