Bridging the Gap Between Monaural Speech Enhancement and Recognition with Distortion-Independent Acoustic Modeling
TABLE III: WERs of the five acoustic models on CHiME-2. chime-2 denotes the official CHiME-2 evaluation set. ADT refers to the average WER of ADTbabble and ADTcafeteria1. See TABLE I caption for other notations.
['SNR', 'reverberant chime-2', 'reverberant chime-2', 'reverberant ADT', 'reverberant ADT', 'noise-dependent chime-2', 'noise-dependent chime-2', 'noise-mismatched ADT', 'noise-mismatched ADT', 'noise-independent chime-2', 'noise-independent chime-2', 'noise-independent ADT', 'noise-independent ADT', 'distortion-independent chime-2', 'distortion-independent chime-2', 'distortion-independent ADT', 'distortion-independent ADT']
The noises used for evaluation include chime-2 noises and ADT. WERs on ADT are the averages of those on ADTbabble and ADTcafeteria1. The reverberant acoustic model on CHiME-2 corresponds to the clean acoustic model on WSJ. It is clear that the reverberant acoustic model benefits from speech enhancement.