Temporal Dynamics for Blind Measurement of Room Acoustical Parameters

In this paper, short- and long-term temporal dynamic information is investigated for the blind measurement of room acoustical parameters. In particular, estimators of room reverberation time (T60) and direct-to-reverberant energy ratio (DRR) are proposed. Short-term temporal dynamic information is obtained from differential (delta) cepstral coefficients. The statistics computed from the zeroth-order delta cepstral sequence serve as input features to a support vector T60 estimator. Long-term temporal dynamic cues, on the other hand, are obtained from an auditory spectrotemporal representation of speech commonly referred to as modulation spectrum. A measure termed as reverberation-to-speech modulation energy ratio, which is computed per modulation frequency band, is proposed and serves as input to T60 and DRR estimators. Experiments show that the proposed estimators outperform a baseline system in scenarios involving reverberant speech with and without the presence of acoustic background...

• Type: Journal
• Year: 2010
• Where: TIM
• Authors: Tiago H. Falk, Wai-Yip Chan
• Keywords: Education, Energy Ratio, Estimators, Temporal Dynamic Information, TIM 2010