non-uniform quantising logarithmic compression

Computing Dictionary

non-uniform quantising logarithmic compression definition


The kind of compression often applied to a sound waveform. Logarithmic compression is a good match for the human ear's sensitivity but cannot handle zero amplitude (for which the logarithm is negative infinity). There are two standard compression functions which give a smooth transition between the logarithmic function and a linear segment passing through the origin: mu-law (North America) and A-law (ITU-T).
(1995-02-21)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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