Spectrogram Inversion

Some useful spectrogram inversion tools written in PyTorch.

Methods

Griffin & Lim

Griffin, Daniel, and Jae Lim. "Signal estimation from modified short-time Fourier transform." IEEE Transactions on Acoustics, Speech, and Signal Processing 32, no. 2 (1984): 236-243.

RTISI-LA

Zhu, Xinglei, Gerald T. Beauregard, and Lonce Wyse. "Real-time iterative spectrum inversion with look-ahead." In 2006 IEEE International Conference on Multimedia and Expo, pp. 229-232. IEEE, 2006.

L-BFGS

Decorsière, Rémi, Peter L. Søndergaard, Ewen N. MacDonald, and Torsten Dau. "Inversion of auditory spectrograms, traditional spectrograms, and other envelope representations." IEEE/ACM Transactions on Audio, Speech, and Language Processing 23, no. 1 (2014): 46-56.

TODO

• Speed comparison on GPU.
• Documentation.
• Examples.