On Compressing Sequences for Self-Supervised Speech Models

• URL: http://arxiv.org/abs/2210.07189v2
• Date: Fri, 14 Oct 2022 15:21:22 GMT
• Title: On Compressing Sequences for Self-Supervised Speech Models
• Authors: Yen Meng, Hsuan-Jui Chen, Jiatong Shi, Shinji Watanabe, Paola Garcia, Hung-yi Lee, Hao Tang
• Abstract summary: We study fixed-length and variable-length subsampling along the time axis in self-supervised learning. We find that variable-length subsampling performs particularly well under low frame rates. If we have access to phonetic boundaries, we find no degradation in performance for an average frame rate as low as 10 Hz.
• Score: 78.62210521316081
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Compressing self-supervised models has become increasingly necessary, as self-supervised models become larger. While previous approaches have primarily focused on compressing the model size, shortening sequences is also effective in reducing the computational cost. In this work, we study fixed-length and variable-length subsampling along the time axis in self-supervised learning. We explore how individual downstream tasks are sensitive to input frame rates. Subsampling while training self-supervised models not only improves the overall performance on downstream tasks under certain frame rates, but also brings significant speed-up in inference. Variable-length subsampling performs particularly well under low frame rates. In addition, if we have access to phonetic boundaries, we find no degradation in performance for an average frame rate as low as 10 Hz.

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