68
RQT7394
Ref
e
re
nce
Glossary
Bitstream
This is the digital form of multi-channel audio data (e.g., 5.1 channel)
before it is decoded into its various channels.
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.
DHCP (Dynamic Host Configuration Protocol)
Provides a mechanism for automatically assigning network
information such as the IP address or Subnet mask sent by the
router and so on to this unit.
DNS Server
A server which acts like a telephone directory and translates Internet
domain names into IP addresses.
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 television’s
speakers. Some DVD-Audio prevent down-mixing of all or part of
their contents. When playing such discs, or such parts of the disc,
unless the number of connected speakers is the same as the disc’s
channel specification, audio will not be output properly.
DPOF (Digital Print Order Format)
DPOF is the standard printing format for still picture data taken by a
digital camera, etc. It is used for automatic printing at a photo
developing store or on your home printer.
Drive
In the instance of this unit, this refers to the hard disk (HDD), disc
(DVD), SD card (SD) and PC card (PC). 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 listen at low
volumes but still hear dialog clearly.
Film and video
DVD-Video 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.
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).
Finalize
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 finalize
DVD-R on this unit.
After finalizing, the disc becomes play-only and you can no longer
record or edit.
Folder
This is a place on the hard disk or memory card where groups of
data are stored together. In the case of this unit, it refers to the place
where still pictures (JPEG, TIFF) or MPEG4 are stored.
Formatting
Formatting is the process of making media such as DVD-RAM
recordable on recording equipment.
You can format the HDD, DVD-RAM and memory cards on this unit.
Formatting erases irrevocably all contents.
Frames and fields
Frames refer to the single images that constitute the video you see
on your television. Each frame consists of two fields.
≥
A frame still shows two fields, so there may be some blurring, but
picture quality is generally better.
≥
A field still shows less picture information so it may be rougher, but
there is no blurring.
Gateway
IP address of the electronic device providing Internet access.
Usually called a router IP address. (e.g., 192.168.0.1)
HDD (Hard disk drive)
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 reading
and writing of large amounts of data at high speed.
Hub
Used for connecting more than one device to the network.
IP address
A set of numbers which distinguish each computer on the network
when, for example, connected to the Internet. When using a
computer in a LAN (
➡
below) to access a computer or device not
part of the LAN, the IP address is called the local IP address. (e.g.,
192.168.0.10)
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
feature of JPEG is less deterioration in picture quality considering
the degree of compression.
LAN (Local Area Network)
A group of linked devices in a company, school or home. Indicates
the boundaries of a particular network.
LPCM (Linear PCM)
These are uncompressed digital signals, similar to those found on
CDs. LPCM sound is available when recording in XP mode.
MAC (Media Access Control) address
Address assigned to each device connected to the network to allow
it to be recognized.
MP3 (MPEG Audio Layer 3)
An audio compression method that compresses audio to
approximately one tenth of its size without any considerable loss of
audio quality. You can play MP3 you have recorded onto CD-R and
CD-RW.
MPEG2/MPEG4 (Moving Picture Experts Group)
A standard for efficiently compressing and expanding color video.
MPEG2 is a compression standard used for DVD and satellite based
digital broadcasting. This unit records programs using MPEG2.
MPEG4 is a compression standard created for use with mobile
equipment and use over networks, providing highly efficient record-
ings even with low bit rates.
Pan&Scan/Letterbox
In general, DVD-Video are produced with the intention that they be
viewed on a widescreen television (16:9 aspect ratio), so images
often don’t fit regular (4:3 aspect ratio) televisions. Two styles of
picture, “Pan & Scan” and “Letterbox”, deal with this problem.
Frame
Field
Field
u
r
7394en.book Page 68 Wednesday, March 30, 2005 9:45 AM
