End-to-End Automatic Speech Recognition with Deep Mutual Learning

• URL: http://arxiv.org/abs/2102.08154v1
• Date: Tue, 16 Feb 2021 13:52:06 GMT
• Title: End-to-End Automatic Speech Recognition with Deep Mutual Learning
• Authors: Ryo Masumura, Mana Ihori, Akihiko Takashima, Tomohiro Tanaka, Takanori Ashihara
• Abstract summary: This paper is the first to apply deep mutual learning to end-to-end ASR models. In DML, multiple models are trained simultaneously and collaboratively by mimicking each other throughout the training process. We demonstrate that DML improves the ASR performance of both modeling setups compared with conventional learning methods.
• Score: 29.925641799136663
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper is the first study to apply deep mutual learning (DML) to end-to-end ASR models. In DML, multiple models are trained simultaneously and collaboratively by mimicking each other throughout the training process, which helps to attain the global optimum and prevent models from making over-confident predictions. While previous studies applied DML to simple multi-class classification problems, there are no studies that have used it on more complex sequence-to-sequence mapping problems. For this reason, this paper presents a method to apply DML to state-of-the-art Transformer-based end-to-end ASR models. In particular, we propose to combine DML with recent representative training techniques. i.e., label smoothing, scheduled sampling, and SpecAugment, each of which are essential for powerful end-to-end ASR models. We expect that these training techniques work well with DML because DML has complementary characteristics. We experimented with two setups for Japanese ASR tasks: large-scale modeling and compact modeling. We demonstrate that DML improves the ASR performance of both modeling setups compared with conventional learning methods including knowledge distillation. We also show that combining DML with the existing training techniques effectively improves ASR performance.

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