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Noise-Robust Hands-free Speech Recognition Based on Spatial Subtraction Array and Known Noise Superimposition

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dc.contributor.author Yasuaki Ohashi en
dc.contributor.author Tsuyoki Nishikawa en
dc.contributor.author Hiroshi Saruwatari en
dc.contributor.author Akinobu Lee en
dc.contributor.author Kiyohiro Shikano en
dc.date.accessioned 2012-08-22T07:58:56Z en
dc.date.available 2012-08-22T07:58:56Z en
dc.date.issued 2005-08 en
dc.identifier.isbn 9780780389120 en
dc.identifier.uri http://hdl.handle.net/10061/8177 en
dc.description IROS2005: IEEE/RSJ International Conference on Intelligent Robots and Systems, August 2-6, 2005, Alberta, Canada. en
dc.description.abstract We propose a spatial subtraction array (SSA) and known noise superimposition to achieve a noise-robust hands-free speech recognition which can be used in human-robot interaction. In the proposed SSA, noise reduction is achieved by subtracting the estimated noise power spectrum from the target speech power spectrum to be enhanced in the mel-scale filter bank domain. This offers a realization of error-robust spatial spectral subtraction with few computational complexities. In addition, we introduce known noise superimposition technique in the mel-scale filter bank domain, and utilize the matched acoustic model for the known noise. This can compensate the acoustic model mismatch and mask the residual noise component in SSA. The experimental results obtained under a real environment reveal that word accuracy of the proposed method is greater than that of the conventional method even when the target user moves between -10 and +10 degrees around the microphone array. en
dc.language.iso en en
dc.publisher IEEE en
dc.rights Copyright 2005 IEEE en
dc.subject Hands-free speech recognition en
dc.subject human-robot interaction en
dc.subject microphone array en
dc.title Noise-Robust Hands-free Speech Recognition Based on Spatial Subtraction Array and Known Noise Superimposition en
dc.type.nii Conference Paper en
dc.textversion Publisher en
dc.identifier.spage 2328 en
dc.identifier.epage 2332 en
dc.relation.doi 10.1109/IROS.2005.1545036 en


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