Advanced periodic signal enhancement
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United States of America Patent
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May 11, 2010
Grant Date -
Jun 22, 2006
app pub date -
Dec 23, 2005
filing date -
Oct 26, 2004
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Abstract
An enhancement system improves the perceptual quality of a processed speech. The system includes a delay unit that delays a signal received through a discrete input. A spectral modifier linked to the delay unit is programmed to substantially flatten the spectral character of a background noise. An adaptive filter linked to the spectral modifier adapts filter characteristics to match a response of a non-delayed signal. A programmable filter is linked to the delay unit. The programmable filter has a transfer function functionally related to a transfer function of the adaptive filter.
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