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RQTV0320
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Glossary/Maintenance/Memory reset (Initialization)
If the surfaces are dirty
To clean this unit, wipe with a soft, dry cloth.
Never use alcohol, paint thinner or benzine to clean this unit.
Before using chemically treated cloth, read the instructions that came with the cloth carefully.
Cleaning of the lens is generally unnecessary although this depends on the operating environment.
Do not use commercially available lens cleaners as they may cause a malfunction.
For a cleaner crisper sound (cassette deck)
Clean the heads regularly to assure good quality playback and recording. Use a cleaning tape (not included).
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Glossary
Decoder
A decoder restores the coded audio signals on DVDs to normal.
This is called decoding.
DivX
DivX is a popular media technology created by DivX, Inc. DivX
media files contain highly compressed video with high visual
quality that maintains a relatively small file size.
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. This unit
can determine which type has been used, then uses the most
suitable method of progressive output.
For NTSC
Film is 24 or 30 frames per second, with motion picture film
generally being 24 frames per second. Video is 60 fields per
second (two fields making up one frame).
For PAL
Film is 25 frames per second. Video is 50 fields per second (two
fields making up one frame).
MPEG4
A compression system for use on mobile devices or a network,
that allows highly efficient recording at a low bit rate.
Linear PCM (Pulse Code Modulation)
These are uncompressed digital signals, similar to those found
on CDs.
Progressive/Interlace
The PAL video signal standard has 576 interlaced (i) scan lines,
whereas progressive scanning, called 576p, uses twice the
number of scan lines. For the NTSC standard, these are called
480i and 480p respectively.
Using progressive output, you can enjoy the high-resolution
video recorded on media such as DVD-Video.
Your television must be compatible to enjoy progressive video.
I/P/B
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.
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.
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.
Maintenance
When the following situations occur, reset the memory:
There is no response when buttons are pressed.
You want to clear and reset the memory contents.
To reset memory
1
Disconnect the AC mains lead. (Wait at least 3 minutes before proceeding to step 2.)
2
While pressing and holding down [
8
] on the main unit, reconnect the AC mains lead.
“ ---------” appears on the display.
3
Release [
8
].
All the settings are returned to the factory preset. You will need to reset the memory items.
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Memory reset (Initialization)
Before moving the unit, ensure the disc tray is empty.
Failure to do so will risk severely damaging the disc and
the unit.
VK870_GC_GS_EN (RQTV0320-1G).indb 37
5/7/2008 10:11:35 AM
