Pvoc matlab, A Matlab Implementation of the Phase Vocoder ...

Pvoc matlab, A Matlab Implementation of the Phase Vocoder A discussion of basic phase vocoding technology is given here with a more detailed pdf version here. Dan Ellis has posted some clean and simple Matlab software1 implementing time-scale modification using the phase vocoder. The 'pvoc' script is a wrapper to perform all three of these steps for a fixed time-scaling factor (larger than one for speeding up; smaller than one to slow down). The phase vocoder performs time stretching and pitch scaling by transforming the audio into frequency domain. The following block diagram shows the operations involved in the phase vocoder im Describes and links to an implementation of the phase vocoder algorithm for time-scale modification of audio in the Matlab language. Download and share free MATLAB code, including functions, models, apps, support packages and toolboxes Describes and links to an implementation of the phase vocoder algorithm for time-scale modification of audio in the Matlab language. This page shows my implementation in Matlab, ph = ph + dphi' + dp; ocol = ocol+1;. function y = pvoc (x, r, n) % y = pvoc (x, r, n) Time-scale a signal to r times faster with phase vocoder % x is an input sound. n is the FFT size, defaults to 1024. What is a Phase Vocoder? The phase vocoder is a variation on the short-time Fourier transform that uses phase information to improve the frequency estimates.


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