System and method for noise reduction using bi-orthogonal modified discrete cosine transform
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United States of America Patent
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Oct 21, 2003
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N/A
app pub date -
Nov 22, 2000
filing date -
Nov 22, 2000
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Expired
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Abstract
The invention provides a perceptual audio signal compression system and method. One aspect of the invention described herein includes transforming the signal into a plurality of bi-orthogonal modified discrete cosine transform (BMDCT) frequency coefficients using a bi-orthogonal modified discrete cosine transform; quantizing the BMDCT frequency coefficients to produce a set of integer numbers which represent the BMDCT frequency coefficients; and encoding the set of integer numbers to lower the number of bits required to represent the BMDCT frequency coefficients.
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