EN-82
27. GLOSSARY
AAC
Advanced Audio Coding (AAC) is a lossy compression
and encoding scheme for digital audio. Audio files that
have been encoded with AAC generally achieves better
sound quality than MP3 at similar bit rates.
AACS
Advanced Access Content System (AACS) is the
content protection scheme used with Blu-ray™ discs.
Analog Audio
An electrical signal that directly represents sound.
Compare this to digital audio which can be an electrical
signal, but is an indirect representation of sound. See also
“Digital Audio”.
Aspect Ratio
The width of a TV screen relative to its height.
Conventional TVs are 4:3 (in other words, the TV screen
is almost square); widescreen models are 16:9 (the TV
screen is almost twice as wide as its height).
AVCHD
AVCHD is a new format for high definition video camcorders
which can record and play high-resolution HD images.
BD-Live™
BD-Live™ is a BD-video (BD-ROM version 2 Profile
2.0) which contains new functions (e.g. Internet
connection), in addition to the BONUSVIEW™ function.
Blockbuster
Blockbuster is online service which you can rent or
purchase movies and TV episodes streamed over the
Internet. Blockbuster is available only in the United States.
Blu-ray Disc™
Blu-ray Disc™ is a next generation optical video disc which
is capable of storing much more data than a conventional
DVD. The large capacity makes it possible to benefit from
the features such as high-definition videos, multi-channel
surround sounds, interactive menus and so on.
Chapter
Just as a book is split up into several chapters, a title
on a BD-video or DVD-video is usually divided into
chapters. See also “Title”.
Digital Audio
An indirect representation of sound by numbers. During
recording, the sound is measured at discrete intervals
(44,100 times a second for CD audio) by an analog-
to-digital converter, generating a stream of numbers.
On playback, a digital-to-analog converter generates
an analog signal based on these numbers. See also
“Sampling Frequency” and “Analog Audio”.
DLNA (Digital Living Network Alliance)
DLNA is a cross-industry organization of consumer
electronics that formulates DLNA Interoperability
Guidelines for sharing digital contents within a home
network.
DNS Server
A server which translates Internet domain names into IP
addresses.
Dolby
®
Digital
The system to compress digital sound developed by
Dolby Laboratories. It offers you sound of stereo (2ch)
or multi-channel audio.
Dolby Digital Plus
Dolby Digital Plus is the next generation digital audio
compression technology developed as an extension to
Dolby Digital. Blu-ray Disc™ supports 7.1 multi-channel
surround sound output.
Dolby Pro Logic II
Dolby Pro Logic II technology processes any high quality
stereo (two-channel) movie and music audio into five
playback channels of full-bandwidth surround sound. A
matrix surround decoding technology, Dolby Pro Logic II
detects the directional cues that occur naturally in stereo
content and uses these elements to create a five-channel
surround sound playback experience.
Dolby TrueHD
Dolby TrueHD is a lossless coding technology developed
for next generation optical discs. Blu-ray Disc™ supports
7.1 multi-channel surround sound output.
DTS
®
(Digital Theater System)
DTS
®
is a multi channel surround sound system. You can enjoy
movie dynamic and realistic sound like movie theater. DTS
surround sound technologies were developed by DTS, Inc.
Continued on next page.
