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- W2006577961 abstract "Many features used in speech recognition tasks are hand-crafted and are not always related to the objective at hand, that is minimizing word error rate. Recently, we showed that replacing a perceptually motivated mel-filter bank with a filter bank layer that is learned jointly with the rest of a deep neural network was promising. In this paper, we extend filter learning to a speaker-adapted, state-of-the-art system. First, we incorporate delta learning into the filter learning framework. Second, we incorporate various speaker adaptation techniques, including VTLN warping and speaker identity features. On a 50-hour English Broadcast News task, we show that we can achieve a 5% relative improvement in word error rate (WER) using the filter and delta learning, compared to having a fixed set of filters and deltas. Furthermore, after speaker adaptation, we find that filter and delta learning allows for a 3% relative improvement in WER compared to a state-of-the-art CNN." @default.
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- W2006577961 date "2014-05-01" @default.
- W2006577961 modified "2023-10-18" @default.
- W2006577961 title "Improvements to filterbank and delta learning within a deep neural network framework" @default.
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- W2006577961 doi "https://doi.org/10.1109/icassp.2014.6854925" @default.
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