Proc. of China-Japan Joint Conference on Acoustics, pp. 191-194, Nanjing, 2002
Modulation cepstrum discriminating between speech and environmental noise
T. Miyoshi, T. Goto, T. Doi, T. Ishida, T. Arai and Y. Murahara
Abstract: We introduce “the modulation cepstrum,” a novel representation of an acoustic signal used to distinguish speech signal and environmental noises. The modulation cepstrum was computed by taking the inverse Fourier transform of the logarithmic modulation spectral representation of the temporal dynamics of a sub-band. We calculated the center of gravity of accumulated the modulation cepstrum for eight seconds of an acoustic signal as an index. The experimental result showed that this index enabled us to discriminate between speech and noise signals.