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