Prediction of speech intelligibility with DNN-based performance measures
Nøgleord:
Speech Intelligibility, Automatic Speech Recognition, Performance Measures, Deep LearningResumé
In this paper, we present a speech intelligibility model based on automatic speech recognition (ASR) that combines phoneme probabilities obtained from a deep neural network and a performance measure that estimates the word error rate from these probabilities. In contrast to previous modeling approaches, this model does not require the clean speech reference or the exact word labels during test time, and therefore, less a priori information. The model is evaluated via the root mean squared error between the predicted and observed speech reception thresholds from eight normal-hearing listeners. The recognition task in both cases consists of identifying noisy words from a German matrix sentence test. The speech material was mixed with four noise maskers covering different types of modulation. The prediction performance is compared to four established models as well as to the ASR-model using word labels. The proposed model performs almost as well as the label-based model and produces more accurate predictions than the baseline models on average.
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