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ADDITIONAL
INFORMATION
■ Dolby Digital
Dolby Digital is a digital surround sound system that gives
you completely independent multi-channel audio. With 3
front channels (left, center, and right), and 2 surround
stereo channels, Dolby Digital provides 5 full-range audio
channels. With an additional channel especially for bass
effects, called LFE (low frequency effect), the system has
a total of 5.1-channels (LFE is counted as 0.1 channel).
The receiver downmixes the multi-channel audio to 2
channel so that you can enjoy Dolby Digital sources
easily.
■ MP3 (MPEG Audio Layer-3)
One of the audio compression methods used by MPEG. It
employs the irreversible compression method, which
achieves a high compression rate by thinning out the data
of hardly audible part to the human ears. It is said to be
capable of compressing the data quantity by about 1/11
(128 kbps) while maintaining a similar audio quality to
music CD.
■ PCM (Pulse Code Modulation)
A signal that is changed to digital format without
compression. A CD is recorded with 16-bit sound at
44.1 kHz, while DVD recording is anywhere from 16 bits
at 48 kHz to 24 bits at 192 kHz, which makes it a higher
quality sound than CD. This signal also has a type called
Packed PCM (PPCM) that can be compressed without any
loss of data.
■ Sampling frequency
The number of sampling (process for digitalizing analog
signals) per second. In principle, the higher the sampling
rate, the wider the frequency range that can be played
back, and the higher the quantized bit rate, the finer the
sound that can be reproduced.
■ Title, Chapter (DVD)
DVD video lets you divide a disc in a big way by titles or a
small way by chapters. Each division is either called a title
number or a chapter number.
■ Track (CD/Video CD/Super Video CD)
A CD, VCD or SVCD can be divided into a number of
segments (tracks). Each division is called a track number.
■ WMA (Windows Media Audio)
An audio compression method developed by Microsoft
Corporation. It employs the irreversible compression
method, which achieves a high compression rate by
thinning out the data of hardly audible part to the human
ears. It is said to be capable of compressing the data
quantity by about 1/22 (64 kbps) while maintaining a
similar audio quality to music CD.
Glossary
Audio information