Glossary, Tray/disc handling procedure – Panasonic SC-VK71D User Manual
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RQT7700
Reference
Glossary
Decoder
A decoder restores the coded audio signals on DVDs to normal. This
is called decoding.
Dolby Digital
This is a method of coding digital signals developed by Dolby
Laboratories. Apart from stereo (2-channel) audio, these signals can
also be multi-channel audio. A large amount of audio information can
be recorded on one disc using this method.
DTS (Digital Theater Systems)
This surround system is used in many movie theaters around the
world. There is good separation between the channels, so realistic
sound effects are possible.
Dynamic range
Dynamic range is the difference between the lowest level of sound
that can be heard above the noise of the equipment and the highest
level of sound before distortion occurs.
Film and video
DVD-Videos are recorded using either film or video. Usually, film is
recorded at 24 frames per second, the rate movies are filmed at, while
video is recorded at 30 frames per second.
Frame still and field still
Frames are the still pictures that go together to make a moving picture.
There are about 30 frames shown each second.
One frame is made up of two fields. A regular television shows these
fields one after the other to create frames.
A still is shown when you pause a moving picture. A frame still is
made up of two alternating fields, so the picture may appear blurred,
but overall quality is high.
A field still is not blurred, but it has only half the information of a frame
still so picture quality is lower.
Interlace and progressive output
NTSC, the video signal standard, has 480 interlaced (I) scan lines,
whereas progressive scanning uses twice the number of scan lines.
This is called 480P. The video signals output from this unit’s
COMPONENT VIDEO OUT terminals (Y, P
B
, P
R
) allow you to enjoy
higher quality pictures than if the signals were output from the VIDEO
OUT terminal or S VIDEO OUT terminal.
I/P/B
MPEG 2, the video compression standard adapted for use with DVD-
Video, codes frames using these 3 picture types.
I: Intra coded picture
This picture has the best quality and is the best to use when
adjusting the picture.
P: Predictive coded picture
This picture is calculated based on past I or P-pictures.
B: Bidirectionally-predictive coded picture
This picture is calculated by comparing past and future I and P-
pictures so it has the lowest volume of information.
Linear PCM (pulse code modulation)
These are uncompressed digital signals, similar to those found on
CDs.
Playback control (PBC)
If a Video CD has playback control, you can select scenes and
information with menus.
Sampling frequency
Sampling is the process of converting the heights of sound wave
(analog signal) samples taken at set periods into digits (digital encoding).
Sampling frequency is the number of samples taken per second, so
larger numbers mean more faithful reproduction of the original sound.
Tray/disc handling procedure
Not adhering to the following may cause problems.
Opening/closing a disc tray
Open/close the tray with
[OPEN/CLOSE ] button only.
Do not pull the tray.
Do not push the tray
with your hand.
OPEN/CLOSE
Inserting a disc correctly
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Insert to fit in the tray
guide.
•
Insert the disc correctly in the position as indicated in the diagrams
above.
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Place only one disc on a tray.
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Insert the disc with the label side facing up.
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