A technique for further compressing digital sound by eliminating frequencies that cannot be perceived by the human ear. Frequencies that are too low or too high are eliminated as well as soft sounds that are drowned out by loud sounds. When several musical instruments are playing simultaneously, depending on frequency and volume at any given moment, the sounds from one instrument can cancel out the sounds of another. The frequencies that cannot be heard are removed.
Perceptual audio coding uses the psycho-acoustic algorithms developed by Dr. Amar Bose, inventor of the Bose speakers and whose company is known for its quality audio products. MP3 uses perceptual audio coding to dramatically reduce the amount of digital data on a music CD. See MP3, audio codec and speech codec.
Perceptual audio coding uses the psycho-acoustic algorithms developed by Dr. Amar Bose, inventor of the Bose speakers and whose company is known for its quality audio products. MP3 uses perceptual audio coding to dramatically reduce the amount of digital data on a music CD. See MP3, audio codec and speech codec.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Alcatel/Microsoft MP3 patent row - Apple could be the next target
- Alcatel/Microsoft MP3 patent row - Apple could be the next targetImpactThe impact of this MP3 patent award is much further reaching than RealNetworks, Sony, Apple, and Creative. Think about all of the products you own that have MP3 capability. Motorola, Nokia and Samsung make MP3 phones. Verizon,...
- Discussion threads 2007-02-26
- RCA MP3Pro Audio Player 1.0.2 (Windows)
- A player and encoder for the new MP3Pro format. The world's most popular audio compression format gets even better! mp3PRO audio technology is both backwards and forwards compatible with mp3 and creates files that are 1/2 or less the size of original mp3 files, with great sound quality. Developed by...
- Software downloads 2001-09-03
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