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Abstract : |
This paper describes recent advances on the use of HMM based technology, for speaker independent continuous speech recognition, in noisy environment, under hands free interaction mode. For this purpose an array of four ominidirectional microphones is employed as acquisition system. The processing of phase information in the Cross-power Spectrum provides the capability both of locating talker position and of reconstructing an enhanced speech spectrum. Here, two enhancement techniques are described, that allow recognition improvement in the case of clean input speech as well as under different adverse conditions. Results refer to the use of a new multichannel corpus, collected in real environment by microphone array as well as close-talk microphone. 1., |
