Estimation of the Frequency Dependent Reverberation Time by means of Warped Filter-Banks
Löllmann H, Vary P (2011)
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2011
Journal
Pages Range: 309-312
Event location: Prague
Abstract
An improved approach for the estimation of the frequency dependent reverberation time (RT) by means of allpass transformed filter-banks is presented. It is shown that by means of these warped filter-banks, a much more accurate RT estimation at lower frequencies can be obtained than by octave filter-banks, which are commonly used for the estimation of the frequency dependent RT. Furthermore, allpass transformed filter-banks can achieve a much better approximation of the non-uniform frequency resolution of the human auditory system than octave filter-banks. A uniform or non-uniform (auditory) frequency resolution can thereby be simply adjusted by a single allpass coefficient.The RT estimation can be done with an allpass transformed DFT or DCT filter-bank. The warped DCT filter-bank is of special interest as it provides real-valued subband signals. This facilitates the use of a maximum-likelihood (ML) estimator for either a non-blind estimation of the frequency dependent RT from a room impulse response or a blind estimation from a reverberant speech signal.
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How to cite
APA:
Löllmann, H., & Vary, P. (2011). Estimation of the Frequency Dependent Reverberation Time by means of Warped Filter-Banks. In Proceedings of the IEEE International Conference on Acoustics, Speech and Language Processing (ICASSP) (pp. 309-312). Prague, CZ.
MLA:
Löllmann, Heinrich, and Peter Vary. "Estimation of the Frequency Dependent Reverberation Time by means of Warped Filter-Banks." Proceedings of the IEEE International Conference on Acoustics, Speech and Language Processing (ICASSP), Prague 2011. 309-312.
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