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Conference Paper (international conference)

On semi-blind estimation of echo paths during double-talk based on nonstationarity

Koldovský Zbyněk, Málek J., Muller M., Tichavský Petr

: 2014 14th International Workshop on Acoustic Signal Enhancement (IWAENC), p. 198-202

: 2014 14th International Workshop on Acoustic Signal Enhancement, (Antibes – Juan les Pins, FR, 08.09.2014-11.09.2014)

: GA14-11898S, GA ČR

: echo cancellation, relative transfer functions, blind source separation

: 10.1109/IWAENC.2014.6954006

: http://library.utia.cas.cz/separaty/2014/SI/tichavsky-0438818.pdf

(eng): The estimation of a filter that determines an echo path is a difficult problem when double-talk is present. We use a Blind Source Separation model based on signals’ nonstationarity with a partially known mixing matrix to estimate the filter during the double talk. A second-order approximation of a log-likelihood function is used to derive a quadratic criterion. Then, we propose two methods to estimate the filter through minimizing the criterion. The first method works in a batch-offline regime, while the second method is designed to estimate the filter adaptively. The methods are verified by experiments and compared with standard least-squares-based approaches.

: BI

07.01.2019 - 08:39