System and method for producing fast modulated complex lapped transforms
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United States of America Patent
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Issued Date -
Aug 19, 2004
app pub date -
Feb 19, 2003
filing date -
Feb 19, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method for producing fast modulated complex transforms (MCLTs) provides a fast MCLT generator for computationally efficient derivation of modulated MCLT coefficients from an input signal of one or more dimensions. The fast MCLT generator performs spectral analysis by spectrally decomposing a 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. The fast MCLT generator directly uses fast Fourier transforms (FFTs) without data shuffling in the derivation of MCLT coefficients from an input signal. The MCLT coefficients represent an encoded version of the input signal. Reconstruction of the input signal is accomplished by performing an inverse MCLT operation on the MCLT coefficients.
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