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Learning Self-Informed Feature Contribution for Deep Learning-Based Acoustic Modeling
DOI:10.1109/TASLP.2018.2858923.png)
摘要
En 中文
In this paper, we introduce a new feature engineering approach for deep learning-based acoustic modeling, which utilizes input feature contributions. For this purpose, we propose an auxiliary deep neural network (DNN) called a feature contribution network (FCN) whose output layer is composed of sigmoid-based contribution gates. In our framework, the FCN tries to learn element-level discriminative contributions of input features and an acoustic model network (AMN) is trained by gated features generated by element-wise multiplication between contribution gate outputs and input features. In addition, we also propose a regularization method for the FCN, which helps the FCN to activate the minimum number of the gates. The proposed methods were evaluated on the TED-LIUM release 1 corpus. We applied the proposed methods to DNN- and long short-term memory-based AMNs. Experimental results results showed that AMNs with the FCNs consistently improved recognition performance compared with AMN-only frameworks.
Keyword:
Acoustic modeling
deep learning
feature contribution network
speech recognition
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期刊
I
IF:
5.1
论文数:
2.6K
被引数:
1.1W
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