Philips NP2500/37 User Manual page 41

Proxy server
A computer network service that allows clients
to make indirect network connections to other
network services.
R
RF (radio frequency)
An alternating current or voltage with a
frequency (or carrier wave) above about
100kHz. It is called radio frequency because
these frequencies have a capacity to be radiated
as electromagnetic waves by radio (and
television) stations.
Rhapsody®
Rhapsody® is an on-line music service that
offers streaming on-demand access to its library
of digital music.
S
S/PDIF (SPDIF) (Sony/Philips Digital Interface)
A standard audio-file transfer-format that was
developed jointly by Sony and Philips. S/PDIF
allows the transfer of digital audio signals from
one device to another, without the need to
convert first to analog. This prevents the quality
of the digital signal degrading during transfer to
analog.
Sensitivity
Volume that a speaker offers for a specific
voltage input, expressed in decibels per watt
(dB/W).
Shuffle
A feature that plays audio files (tracks) in
random order.
Signal to noise ratio
Represents the difference between the level of
the audio signal, and any interference. The larger
the figure, the purer the sound.
SPL (sound pressure level)
An acoustic measurement of sound energy.
1 dB SPL is the smallest increment in sound
level to which the average human is sensitive.
Theoretically, 0 dB SPL is the threshold of
human hearing while approximately 120 dB is
the threshold of pain.
Stereo
Literally means solid. Usually taken to refer to
two channel stereo, though developments in
digital audio facilitate multichannel stereo.
Streaming
A technique for transferring data such that it
can be processed as a steady and continuous
stream. Streaming technologies are often used
on the Internet because many users do not
have fast enough access to download large
multimedia files quickly, so the client browser or
plug-in can start displaying the data before the
entire file has been transmitted.
SuperPlay
SuperPlay™ is a special feature of the NP2500,
which enables the listener to play all the music
under a top-level library category, such as artists
or albums, without having to select playlist items.
T
Thumbnail
A thumbnail is reduced-size versions of a
picture that is used to make it easier to
recognize an them. Thumbnails serve the same
role for images as a normal text index does for
words.
TwonkyMedia
TwonkyMedia™ is a media server that enables
wireless streaming from a computer to the
NP2500.
TwonkyMedia™ is a registered trademark of
Packet Video™ Corporation. All rights reserved.
© Packet Video Corporation, 10350 Science
Center Drive, San Diego, California, USA.
U
UPnP (Universal Plug and Play)
Universal Plug and Play is a networking
architecture developed by a consortium of
companies to ensure easy connectivity between
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