Panasonic DMR-EZ47VEB - Manual (Page 92)

92
RQT8857
Bitstream
This is a signal compressed and converted into digital form. It is
converted back to a multi-channel audio signal, e.g., 5.1-channel, by a
decoder.
CPRM (Content Protection for Recordable Media)
CPRM is technology used to protect broadcasts that are allowed to
be recorded only once. Such broadcasts can be recorded only with
CPRM-compatible recorders and discs.
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.
When recording on this unit Dolby Digital (2 channel) is the default
audio.
Down-mixing
This is the process of remixing the multi-channel audio found on some
discs into two channels. It is useful when you want to listen to the 5.1-
channel audio recorded on DVDs through your TV’s speakers. Some
discs prohibit down-mixing. If this is the case, this unit can only output
the front two channels.
Drive
In the instance of this unit, this refers to disc (DVD) and video cassette
(VHS). These perform the reading and writing of data.
DTS (Digital Theater Systems)
This surround system is used in many movie theaters. 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. Dynamic range compression means
reducing the gap between the loudest and softest sounds. This means
you can hear dialogue clearly at low volume.
Film and Video
DVD-Videos are recorded using either fi lm or video. The unit can
determine which type has been used, then uses the most suitable
method of progressive output.
Film:
Recorded at 25 frames per second (PAL discs) or 24 frames
per second (NTSC discs). (NTSC discs recorded at 30
frames per second as well.)
Generally appropriate for motion picture fi lms.
Video: Recorded at 25 frames/50 fi elds per second. (PAL discs)
or 30 frames/60 fi elds per second (NTSC discs). Generally
appropriate for TV drama programmes or animation.
Finalise
A process that makes play of a recorded CD-R, CD-RW, DVD-R, etc.
possible on equipment that can play such media. You can fi nalise DVD-
R, DVD-R DL, DVD-RW (DVD-Video format), +R, and +R DL on the
unit. After fi nalising, the disc becomes play-only and you can no longer
record or edit. However, fi nalised DVD-RW can be formatted to become
recordable.
Formatting
Formatting is the process of making media such as DVD-RAM
recordable on recording equipment.
You can format DVD-RAM, DVD-RW (only as DVD-Video format) and,
+RW or unused +R and +R DL on this unit.
Formatting irrevocably erases all contents.
Frame and Field
Frame refers to the single images that constitute the video you see on
your TV. Each frame consists of 2 fi elds.
W T
Frame Field Field
 A frame still shows 2 fi elds, so there may be some blurring between
them, but picture quality is generally better.
 A fi eld still shows less picture information so it may be rougher, but
there is no blurring.
HDMI (High-Defi nition Multimedia Interface)
Unlike conventional connections, it transmits uncompressed digital
video and audio signals on a single cable. This unit supports high-
defi nition video output [720p (750p), 1080i (1125i) and 1080p (1125p)]
from HDMI AV OUT terminal. To enjoy high-defi nition video a high
defi nition compatible television is required.
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 benefi t of
JPEG is less deterioration in picture quality considering the degree of
compression.
LPCM (Linear PCM)
These are uncompressed digital signals, similar to those found on CDs.
LPCM sound is available when recording in XP mode.
MPEG2 (Moving Picture Experts Group)
A standard for effi ciently compressing and expanding colour video.
MPEG2 is a compression standard used for DVD and satellite based
digital broadcasting. This unit records programmes using MPEG2.
MP3 (MPEG Audio Layer 3)
An audio compression method that compresses audio to approximately
one-tenth of its size without any signifi cant loss of audio quality. You
can play MP3s you have recorded onto DVD-R, DVD-R DL, CD-R and
CD-RW.
Pan & Scan/Letterbox
In general, DVD-Video are produced with the intention that they will be
viewed on a widescreen TV (16:9 aspect ratio), so images often don’t
fi t regular TVs (4:3 aspect ratio). 2 styles of picture, “Pan & Scan” and
“Letterbox”, deal with this problem.
Pan & Scan: The sides are cut off so the picture
fi lls 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.
Playback control (PBC)
If a Video CD has playback control, you can select scenes and
information with menus.
(This unit is compatible with version 2.0 and 1.1.)
Glossary