TD-PSOLA vs. PSOLA

[Sarah B]

I understand that TD-PSOLA is a time domain version of pitch synchronous overlap and add, but I’m wondering what other versions of it there are. Do we sometimes do PSOLA in the frequency domain? How would that work? Or can you give any other examples of PSOLA that isn’t TD-PSOLA?

(I know it isn’t a reliable source, but the wikipedia article for PSOLA just seems to describe TD-PSOLA)

[Simon]

PSOLA can be used on the residual signal during Residual Excited Linear Prediction (RELP). The residual is of course just a waveform, so is in the time domain. But we usually reserve the term TD-PSOLA for application to speech waveforms only.

PSOLA doesn’t apply in the frequency domain.

[Author]

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