Matlab for Unwrapping Spectral Phase

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Index: Spectral Audio Signal Processing

Spectral Audio Signal Processing

Examples in Matlab and Octave

Matlab listing: testmyspectrogram.m

Matlab listing: unwrap.m

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Index: Spectral Audio Signal Processing

Spectral Audio Signal Processing

Examples in Matlab and Octave

Matlab listing: testmyspectrogram.m

Matlab listing: unwrap.m

Matlab for Unwrapping Spectral Phase

When spectral phase is processed, it is often necessary to unwrap the phase to make it a ``continuous'' function. Below is a simple matlab function for this purpose. It is based on the assumption that phase jumps by more than $\pi$ radians must have been ``wrapped''. That is, multiples of $2\pi$ are added or subtracted so that the phase changes by no more than $\pm\pi$ from one spectral bin to the next. Bin 0 (corresponding to dc) is arbitrarily chosen as ``unwrapped'' and used as a starting point for the unwrapping algorithm.

Subsections

Matlab listing: unwrap.m

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``Spectral Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2011, ISBN 978-0-9745607-3-1.
Copyright © 2022-02-28 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA), Stanford University

Matlab for Unwrapping Spectral Phase

``Spectral Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2011, ISBN 978-0-9745607-3-1. Copyright © 2022-02-28 by Julius O. Smith III Center for Computer Research in Music and Acoustics (CCRMA), Stanford University

``Spectral Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2011, ISBN 978-0-9745607-3-1.
Copyright © 2022-02-28 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA), Stanford University