I am trying to figure out speech features that can be inverted to recover the audio back with no loss or as less loss as possible.
I am currently using the power spectrum which is completely reversible.
I also read about MFCC and LPC as potential features but both of them seem to be lossy in terms of recovering the audio.
Also is there a way to compute the power spectrum in the Wavelet domain and is it any better a feature than the power spectrum computed using FFT?
If there are any other features it would be great to know about that.
Thanks for the help.