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Glossary
AAC (Advanced Audio Coding)
An audio compression method that compresses audio to
approximately 1/12 of its size with CD-level quality.
CPPM (Content Protection for Pre-recorded Media)
A copy protection system used for DVD-Audio files. This unit
supports CPPM.
Decoder
A decoder restores the coded audio signals on DVDs to
normal. This is called decoding.
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.
Down-mixing
This is a process of remixing the multi-channel audio (surround
sound) on some discs into two channels. When you want to
listen to the audio on a DVD with a 5.1 channel digital surround
track through your television speakers, the down-mixed audio
will be output.
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.
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.
Film: Recorded at 24 frames per second. (Recorded at 30
frames per second as well). Generally appropriate for
motion picture films.
Video: Recorded at 30 frames/60 fields per second. Generally
appropriate for TV drama programs or animation.
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.
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 PC, 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.
HDMI (High-Definition Multimedia Interface)
HDMI is a next-generation digital interface for consumer
electronic products. Unlike conventional connections, it
transmits uncompressed digital video and audio signals on a
single cable. This unit supports high-definition video output
(720p,1080i,1080p) from the HDMI AV OUT terminal. To enjoy
high-definition video, a high-definition compatible television is
required.
Hub
Used for connecting more than one device to the network.
IP address
A set of numbers which distinguish each PC on the network
when, for example, connected to the Internet. When using a
PC in a LAN (➜ below) to access a PC or device that is not
included in 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 benefit 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.
MAC (Media Access Control) address
Address assigned to each device connected to the network to
allow it to be recognized.
PTX79P.book Page 108 Monday, April 9, 2007 9:24 AM