Methods and apparatus for reducing discontinuities between frames of sinusoidally modeled acoustic waveforms, such as speech, which occur when sampling at low frame rates. A Fast Fourier Transform-based overlap-add technique is applied to amplitude, frequency and phase components of sinusoidal waves...http://www.google.com/patents/US4937873?utm_source=gb-gplus-sharePatent US4937873 - Computationally efficient sine wave synthesis for acoustic waveform processing
