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RQT6920
Reference
Glossary
Bitstream
This is the digital form of multi-channel audio data (e.g., 5.1 chan-
nel) before it is decoded into its various channels.
CPRM (Content Protection for Recordable Media)
CPRM is the copyright protection technology that is used to protect
broadcasts that are allowed to be recorded only once (e.g. some
CATV broadcasts).
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 Labo-
ratories. 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.
This unit is set to record using Dolby Digital in all recording modes.
Dolby Pro Logic
A surround system where a 4-channel audio track is recorded as 2
channels and then is restored to 4 channels for play. The surround
channel is monaural and can reproduce up to 7 kHz.
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.
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 pic-
ture. 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 COM-
PONENT VIDEO OUT terminals (Y, P
B, PR) 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 adopted 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. This unit outputs linear
PCM sound in 2 channels from the DIGITAL AUDIO OUT terminals.
Playback control (PBC)
If a Video CD has playback control, you can select scenes and infor-
mation with menus.
Pan&Scan/Letterbox
In general, DVD-Video are produced with the intention that they be
viewed on a widescreen television with an aspect ratio of 16:9. This
means you can view most material with the intended aspect ratio on
a widescreen television.
Material with this ratio will not fit onto a standard television with an
aspect ratio of 4:3. Two styles of picture, “Pan&Scan” and “Letter-
box”, deal with this problem.
Pan&Scan: The sides are cut off so the
picture fills the screen.
Letterbox: Black bands appear at the top
and bottom of the picture so the
picture itself appears in an
aspect ratio of 16:9.
Do not use irregularly shaped discs, such as heart-shaped.
(These can damage the unit.)
∫ How to hold a disc
Do not touch the recorded surface.
∫ If there is dirt or condensation on the disc
Moisture may condense on discs after they are brought inside from
the cold.
DVD-RAM and DVD-R
Clean only with the DVD-RAM/PD disc cleaner available as an
optional accessory, part number LF-K200DCA1.
Do not use cleaners or cloths for CDs to clean DVD-RAM and
DVD-R.
DVD-Video, Video CD, CD
Wipe with a damp cloth and then wipe dry.
∫ Handling precautions
≥Do not write on the label side with a ball-point pen or other writing
instrument.
≥Do not use record cleaning sprays, benzine, thinner, static electric-
ity prevention liquids or any other solvent.
≥Do not attach labels or stickers to discs. (Do not use discs with
exposed adhesive from tape or left over peeled-off stickers.)
≥Do not use scratch-proof protectors or covers.
≥Do not use discs printed with label printers available on the mar-
ket.
≥Do not use discs that are badly warped or cracked.
Disc handling