Method and apparatus for audio compression
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United States of America Patent
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Nov 15, 2005
Grant Date -
Sep 2, 2004
app pub date -
Mar 3, 2003
filing date -
Feb 28, 2003
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Abstract
A method and apparatus for audio compression receives an audio signal. Transform coding is applied to the audio signal to generate a sequence of transform frequency coefficients. The sequence of transform frequency coefficients is partitioned into a plurality of non-uniform width frequency ranges and then zero value frequency coefficients are inserted at the boundaries of the non-uniform width frequency ranges. As a result, certain of the transform frequency coefficients that represent high frequencies are dropped.
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