Towards Speech Recognition Oriented Dereverberation
Pamornpol Jinachitra, Rocio Prieto · 2006
We show the effect of reverberation on the speech recognition performance in a far-field microphone. Given the reference of a close-talk microphone signal, an improvement is shown using an asymmetric non-causal inverse filter both in a synthetic and real room environment. Its variants in time and frequency domain are also presented and compared with other existing techniques. We argue for the approaches which specifically consider recognition performance as a goal in deriving the dereverberating schemes, with evaluation on real room recording recognition, as a future direction for solving reverberation problems in speech recognition.