Time Delay Estimation from Mixed Multispeaker Speech Signals Using Single Frequency Filtering

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-01-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Circuits, Systems, and Signal Processing
Abstract
A method is proposed for time delay estimation (TDE) from mixed source (speaker) signals collected at two spatially separated microphones. The key idea in this proposal is that the crosscorrelation between corresponding segments of the mixed source signals is computed using the outputs of single frequency filtering (SFF) obtained at several frequencies, rather than using the collected waveforms directly. The advantage of the SFF output is that it will have high signal-to-noise ratio regions in both time and frequency domains. Also it gives multiple evidences, one from each of the SFF outputs. These multiple evidences are combined to obtain robustness in the TDE. The estimated time delays can be used to determine the number of speakers present in the mixed signals. The TDE is shown to be robust against different types and levels of degradations. The results are shown for actual mixed signals collected at two spatially separated microphones in a live laboratory environment, where the mixed signals contain speech from several spatially distributed speakers.
Description
Keywords
Crosscorrelation, Multispeaker speech, Number of speakers, Single frequency filtering, Speech analysis, Time delay estimation
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Citation
Narayana Murthy , B H V S , Yegnanarayana , B & Kadiri , S R 2019 , ' Time Delay Estimation from Mixed Multispeaker Speech Signals Using Single Frequency Filtering ' , Circuits, Systems, and Signal Processing . https://doi.org/10.1007/s00034-019-01239-2