#5 Improving RTISI Phase Estimation with Energy Order and Phase Unwrapping
Volker Gnann, Martin Spiertz
This paper presents two ways to improve the Real-Time Iterative
Spectrogram Inversion (RTISI) algorithm. The standard RTISI phase
estimator with look-ahead processes the buffered frames in reverse
order. We show that better results are achieved by controlling
this order according to frame energy. Another improvement is to
initialize the last row of the phase estimator buffer by progressing
the unwrapped phase differenceof the previous frames. Furthermore,
we extend these improvements to dual window length phase estimation
and analyze the performance in SER with respect to different analysis
window lengths.
