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15. GLOSSARY
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” on page 51.
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.
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” on page 52.
Cinavia™
Cinavia Notice
This product uses Cinavia technology to limit the
use of unauthorized copies of some commercially-
produced film and videos and their soundtracks. When
a prohibited use of an unauthorized copy is detected,
a message will be displayed and playback or copying
will be interrupted.
More information about Cinavia technology is
provided at the Cinavia Online Consumer Information
Center at
http://www.cinavia.com
To request additional information about Cinavia by
mail, send a postcard with your mailing address to:
Cinavia Consumer Information Center, P.O. Box 86851,
San Diego, CA, 92138, USA.
This product incorporates proprietary technology
under license from Verance Corporation and is
protected by U.S. Patent 7,369,677 and other U.S.
and worldwide patents issued and pending as well
as copyright and trade secret protection for certain
aspects of such technology.
Cinavia is a trademark of Verance Corporation.
Copyright 2004-2017 Verance Corporation. All
rights reserved by Verance. Reverse engineering or
disassembly is prohibited.
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”.
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