Chao-Wen Li — accepted AI-conference papers

2016

Posterior probabilistic modeling for inter-channel phase and time difference estimation in audio signals

ICASSP 2016accepted

A method is proposed for the estimation of the time difference of arrival (TDOA) from a sound source to a pair of microphones. Given noisy observations of the source, the magnitude spectrum of the source is first estimated via smoothing across time frames. Then, a probability density function (PDF)…

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2015

Joint estimation of vocal tract and nasal tract area functions from speech waveforms via auto-regression moving-average modeling and a pole assignment method

Shang-Hsuan Peng, Chao-Wen Li, Yi-Wen Liu

ICASSP 2015accepted

Nasal resonance is utilized in certain languages to differentiate word meanings. The joint filtering effect by the vocal tract and the nasal tract can be modeled by the auto-regression moving-average (ARMA) approach. However, unlike all-pole (i.e., AR) modeling, it has been difficult to derive the e…

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