Understanding Self-Supervised Learning of Speech Representation via Invariance and Redundancy Reduction
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910306742042624 |
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| author | Brima, Yusuf Krumnack, Ulf Pika, Simone Heidemann, Gunther |
| author_facet | Brima, Yusuf Krumnack, Ulf Pika, Simone Heidemann, Gunther |
| contents | Self-supervised learning (SSL) has emerged as a promising paradigm for learning flexible speech representations from unlabeled data. By designing pretext tasks that exploit statistical regularities, SSL models can capture useful representations that are transferable to downstream tasks. This study provides an empirical analysis of Barlow Twins (BT), an SSL technique inspired by theories of redundancy reduction in human perception. On downstream tasks, BT representations accelerated learning and transferred across domains. However, limitations exist in disentangling key explanatory factors, with redundancy reduction and invariance alone insufficient for factorization of learned latents into modular, compact, and informative codes. Our ablations study isolated gains from invariance constraints, but the gains were context-dependent. Overall, this work substantiates the potential of Barlow Twins for sample-efficient speech encoding. However, challenges remain in achieving fully hierarchical representations. The analysis methodology and insights pave a path for extensions incorporating further inductive priors and perceptual principles to further enhance the BT self-supervision framework. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2309_03619 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Understanding Self-Supervised Learning of Speech Representation via Invariance and Redundancy Reduction Brima, Yusuf Krumnack, Ulf Pika, Simone Heidemann, Gunther Sound Machine Learning Audio and Speech Processing Self-supervised learning (SSL) has emerged as a promising paradigm for learning flexible speech representations from unlabeled data. By designing pretext tasks that exploit statistical regularities, SSL models can capture useful representations that are transferable to downstream tasks. This study provides an empirical analysis of Barlow Twins (BT), an SSL technique inspired by theories of redundancy reduction in human perception. On downstream tasks, BT representations accelerated learning and transferred across domains. However, limitations exist in disentangling key explanatory factors, with redundancy reduction and invariance alone insufficient for factorization of learned latents into modular, compact, and informative codes. Our ablations study isolated gains from invariance constraints, but the gains were context-dependent. Overall, this work substantiates the potential of Barlow Twins for sample-efficient speech encoding. However, challenges remain in achieving fully hierarchical representations. The analysis methodology and insights pave a path for extensions incorporating further inductive priors and perceptual principles to further enhance the BT self-supervision framework. |
| title | Understanding Self-Supervised Learning of Speech Representation via Invariance and Redundancy Reduction |
| topic | Sound Machine Learning Audio and Speech Processing |
| url | https://arxiv.org/abs/2309.03619 |