Sinewave-based phase dispersion for audio preprocessing
Thomas F. Quatieri, R. McAulay · 2003
A sinusoidal-based analysis/synthesis system is used to apply radar signal design solutions to the problem of dispersing the phase of a speech waveform. Integrated with dynamic range compression, the resulting system can give a significant reduction in peak/RMS ratio with acceptable loss in quality. The spectral information in the resulting processed speech waveform is embedded primarily within the zero crossings of the modified waveform, rather than the waveform shape. Consequently, this dispersion technique also serves as a preprocessor for waveform clipping, allowing considerably deeper thresholding than can be tolerated on the original waveform.>