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GLOSSARY
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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 DVD receiver downmixes the multi-channel audio to
2 channel so that you can enjoy Dolby Digital sources
easily.
Linear PCM (LPCM)
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 (P.PCM) that can be compressed without any
loss of data.
Dynamic range
The difference between the smallest sound that can be
heard above the equipment noise and the biggest sound
that can be heard without distortion is the dynamic range.
Sampling frequency and quantized bit
rate
When converting an analog signal to digital, the number of
times the signal is sampled per second is called the
sampling frequency, while the degree of fineness when
converting the sound level into a numeric value is called
the quantized bit rate.
The frequency band that can be played back is determined
by the sampling rate, while the dynamic range expressing
the difference in sound level is determined by the
quantized bit rate. 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.
Track (CD/Video CD)
A CD or Video CD can be divided into a number of
segments (tracks). Each division is called a title number.
GLOSSARY
Audio formats Audio information
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