Modulated complex lapped transform for integrated signal enhancement and coding
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United States of America Patent
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Dec 17, 2002
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May 5, 1999
filing date -
May 5, 1999
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Abstract
The present invention is embodied in a system and method for performing spectral analysis of a digital signal having a discrete duration by spectrally decomposing the digital signal at predefined frequencies uniformly distributed over a sampling frequency interval into complex frequency coefficients so that magnitude and phase information at each frequency is immediately available to produce a modulated complex lapped transform (MCLT). The present invention includes a MCLT processor, an acoustic echo cancellation device and a noise reducer integrated with an encoder/decoder device.
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