Glossary - RCA DVD/CD Receiver Speaker System Owner's Manual

Additional Information

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 screen is almost square); widescreen
models are 16:9 (the screen is almost twice as
wide as it is high).
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.
Dolby Digital / Pro Logic II
Dolby Digital uses up to 5.1 discrete channels
of audio for surround sound. The front,
center and surround channels are full range,
while a Low Frequency Effects channel
delivers bass sounds often used for sound
effects (hence 5.1 channels).
Dolby Pro Logic II is a matrix decoding
system that extracts 4.1 (Dolby Pro Logic) or
5.1 (Dolby Pro Logic II) channel surround
sound from a two channel source.
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DRM
DRM (Digital Rights Management) is a type of
server software developed to enable secure
distribution of paid content over the Web,
recently incorporated by WMA (Windows
Media Audio).
DTS
R
DTS stands for Digital Theater System. DTS is
a surround system different from Dolby
Digital that has become a popular surround
sound format for movies.
Dynamic Range
The difference between the quietest and
loudest sounds possible in an audio signal
(without distorting or getting lost in noise).
Dolby Digital and DTS soundtracks are
capable of a very wide dynamic range,
delivering dramatic cinema-like effects.
EXIF (Exchangeable Image File)
A file format developed by Fuji Photo Film
for digital still cameras. Digital cameras from
various manufacturers use this compressed
file format which carries date, time and
thumbnail information, as well as the picture
data.
File Extension
A tag added to the end of a filename to
indicate the type of file. For example, ".mp3"
indicates an MP3 file.
ISO 9660
International standard for the volume and file
structure of CD-ROM discs.
JPEG
A file format used for still images, such as
photographs and illustrations. JPEG files are
identified by the file extension ".jpg" or
".JPG". Most digital cameras use this format.