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English
EN
B
Bit rate
Bit rate is the number of b its that are
conveyed or processed per unit of t ime. The
bit rate is usually meas ured in some multiple
of bits per second (kilob its per second: kbps).
The term bit rate is a sy nonym for data
transfer rate (or simply d ata rate).
C
Compression
In audio terms, this is a pr ocess of temporarily
or permanently red ucing audio data for more
efcient storage or t ransmission. A temp orary
reduction in le size is c alled ‘non-lossy’
compression, and no infor mation is lost. A
permanent reduc tion in le size (such as with
MP3 les) is called ‘lossy’ comp ression, and
involves discarding unne cessary informatio n
which is irretriev ably lost.
D
Decibel (dB)
A unit of measure used to exp ress relative
difference in power or inte nsity of sound.
F
FM (Frequency Modulation)
In radio broadcas ting: a method of modulatio n
in which the frequenc y of the carrier volta ge
is varied with the fre quency of the modulatio n
voltage.
Frequency Response
Is the range of frequenc ies that a speaker
reproduces, lowest f requency to the highes t.
While the optimal norma l is 20-20,000 Hz
(Hertz), the rang e of human hearing for
individuals is often mu ch more restric ted.
A good full-range spea ker system however,
reproduces as much of this r ange as possible
to cover all variations. I ndividual driver s are
limited to reproduce onl y that part of the
spectrum for which th ey were made, so their
response is limited, bu t still a necessary po int
to consider when designin g a complete sound
system.
FullSound
FullSound™ is an innovative tech nology
designed by Philips. FullS ound™ faithfully
restores sonic det ails to compressed music,
enhancing it to provide a full so und experience
without any distor tion.
L
LCD (Liquid Crystal Displ ay)
Probably the most commo n way to show
visual information on non -computer elect ronic
equipment.
Lossless compression
A system for reducing th e number of data bits
(density) in a musical signal wi thout corrupting
the original.
M
MP3
A le format with a sound da ta compression
system. MP3 is the abb reviation of Motion
Picture Exper ts Group 1 (or MPEG-1) Audio
Layer 3. With the MP3 for mat, one CD-R or
CD-RW can contain abou t 10 times more
data than a regular CD.