Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

On the performance of LPTV coherence reduction methods in the sub-band domain for stereophonic acoustic echo cancellation

: Valero, M.L.; Habets, E.A.P.

Informationstechnische Gesellschaft -ITG-; Informationstechnische Gesellschaft -ITG-, Fachausschuss Sprachakustik:
Speech Communication. 12. ITG-Fachtagung Sprachkommunikation 2016 : 5. - 7. Oktober 2016 in Paderborn, CD-ROM
Berlin: VDE-Verlag, 2016 (ITG-Fachbericht 267)
ISBN: 3-8007-4275-6
ISBN: 978-3-8007-4275-2
Fachtagung Sprachkommunikation <12, 2016, Paderborn>
Conference Paper
Fraunhofer IIS ()

Reducing the coherence of loudspeaker signals prior to reproduction solves the non-uniqueness problem of stereophonic acoustic echo cancellation. However, there is a trade-off between the effectiveness of coherence reduction methods and the subjective audio quality of the pre-processed signals. Sub-band-domain coherence reduction methods present the advantage that this tradeoff can be controlled for each sub-band. Among these, the linear periodically time-varying (LPTV) phase modulation method provides a good trade-off, while the frequency shift method, which is also LPTV, achieves the maximum coherence reduction. Here, the performance of these sub-band-domain LPTV methods is evaluated and compared, to provide further insight into their suitability as pre-processors for stereophonic acoustic echo cancellation.