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SONAR: Sentence-Level Multimodal and Language-Agnostic Representations

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arxiv 2308.11466 v2 pith:VMPRIPGK submitted 2023-08-22 cs.CL

SONAR: Sentence-Level Multimodal and Language-Agnostic Representations

classification cs.CL
keywords speechencoderssonarembeddingexistingfixed-sizelanguagesmultilingual
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We introduce SONAR, a new multilingual and multimodal fixed-size sentence embedding space. Our single text encoder, covering 200 languages, substantially outperforms existing sentence embeddings such as LASER3 and LabSE on the xsim and xsim++ multilingual similarity search tasks. Speech segments can be embedded in the same SONAR embedding space using language-specific speech encoders trained in a teacher-student setting on speech transcription data. Our encoders outperform existing speech encoders on similarity search tasks. We also provide a text decoder for 200 languages, which allows us to perform text-to-text and speech-to-text machine translation, including for zero-shot language and modality combinations. Our text-to-text results are competitive compared to the state-of-the-art NLLB~1B model, despite the fixed-size bottleneck representation. Our zero-shot speech-to-text translation results compare favorably with strong supervised baselines such as Whisper.

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Cited by 12 Pith papers

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