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14. GLOSSARY
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 is a new format for high definition video
camcorders which can record and play high-resolution HD
images.
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”.
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 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.
DTS-HD
®
DTS-HD
®
is a lossless coding technology developed as an
extension of the original DTS Coherent Acoustics format.
Blu-ray Disc™ supports 7.1 multi-channel surround sound
output.
Film Fresh is online service which you can rent or purchase
movies and TV episodes streamed over the Internet.
Film Fresh is available only in the United States.
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