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RQT6570
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
except for XP mode, where you may choose Dolby Digital or LPCM.
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.
DPOF (Digital Print Order Format)
DPOF is the standard printing format for still picture data. It is used
at a photo studio to print out the still picture data taken with a digital
camera etc. or when you print out using a domestic printer.
Drive
In the instance of this unit, this refers to the hard disk (HDD) and
DVD. These perform the reading and writing of data. Select them by
pressing the drive select buttons ([HDD] or [DVD]).
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.
FAT (File Allocation Table)
The FAT12 (12-bit file allocation table) and FAT16 (16-bit file alloca-
tion table) systems this unit is compatible with are file systems used
widely in computers around the world.
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.
Hard disk drive (HDD)
This is a mass data storage device used in computers etc. A disk
with a surface that has been treated with magnetic fluid is spun and
a magnetic head is brought in close proximity to facilitate the read-
ing and writing of large amounts of data at high speed.
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.
JPEG (Joint Photographic Experts Group)
This is a system used for compressing/decoding color still pictures.
If you select JPEG as the storage system on digital cameras etc.,
the data will be compressed to 1/10–1/100 of its original size. The
special quality of this standard is that there is little deterioration in
picture quality in comparison to the degree of compression.
Linear PCM (pulse code modulation)
These are uncompressed digital signals. This unit outputs linear
PCM sound in 2 channels from the DIGITAL AUDIO OUT terminal.
LPCM sound is available when recording in XP mode.
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.
66


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