In this paper, we study the effect of noise and reverberation on the phase spectrum and its impact on acoustic localization. In contrast with the existing Generalized Cross Correlation weighting functions that take only the signal's magnitude into account, we introduce a novel fused approach which also makes use of the phase information. In this approach, the phase spectra of the noise-corrupted microphone array signals are restored by an estimate of the sound source's phase information obtained from the noise-suppressed STFT magnitude. The proposed approach can be readily combined with any existing weighting function or Time Delay Estimation algorithm. Experimental results demonstrate the potential of this approach and show that it can improve the acoustic localization in joint noisy and reverberant conditions.
Athanasopoulos, G, Dekens, T & Verhelst, W 2013, Acoustic Localization Enhanced with Phase Information from Modified STFT Magnitude. in Proceedings of the 18th International Conference on Digital Signal Processing (DSP 2013). IEEE, Digital Signal Processing (DSP), 2013 18th International Conference on, Fira, Greece, 1/07/13.
Athanasopoulos, G., Dekens, T., & Verhelst, W. (2013). Acoustic Localization Enhanced with Phase Information from Modified STFT Magnitude. In Proceedings of the 18th International Conference on Digital Signal Processing (DSP 2013) IEEE.
@inproceedings{0eaa394d021d4619b1d19a2f0104bfac,
title = "Acoustic Localization Enhanced with Phase Information from Modified STFT Magnitude",
abstract = "In this paper, we study the effect of noise and reverberation on the phase spectrum and its impact on acoustic localization. In contrast with the existing Generalized Cross Correlation weighting functions that take only the signal's magnitude into account, we introduce a novel fused approach which also makes use of the phase information. In this approach, the phase spectra of the noise-corrupted microphone array signals are restored by an estimate of the sound source's phase information obtained from the noise-suppressed STFT magnitude. The proposed approach can be readily combined with any existing weighting function or Time Delay Estimation algorithm. Experimental results demonstrate the potential of this approach and show that it can improve the acoustic localization in joint noisy and reverberant conditions.",
keywords = "microphone array, time delay estimation, generalized cross correlation, phase estimation, modified STFT magnitude",
author = "Georgios Athanasopoulos and Tomas Dekens and Werner Verhelst",
year = "2013",
month = jul,
language = "English",
isbn = "978-1-4673-5807-1",
booktitle = "Proceedings of the 18th International Conference on Digital Signal Processing (DSP 2013)",
publisher = "IEEE",
note = "Digital Signal Processing (DSP), 2013 18th International Conference on ; Conference date: 01-07-2013 Through 03-07-2013",
}