Speech waveform recovery from a reverberant speech signal using inverse filtering of the power envelope transfer function

摘要

Research on recovering the sound source waveform from signals observed in a room with reverberation is important for diagnosis of mechanical failure and improve- ment of clarity in conference calls. In this paper, the possi- biligy is studied for recovery of the original sound waveform from only the reverberation time information without in- verse filtering of the transfer function of the reverberant field. The power envelope of the indoor impulse response is approximated with an exponential function and the enve- lope of the speech signal is restored by power envelope inverse filtering of the reverberant signal.