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SpeechT5: Unified-Modal Encoder-Decoder Pre-Training for Spoken Language Processing

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arxiv 2110.07205 v3 pith:UM6JL6N7 submitted 2021-10-14 eess.AS cs.CLcs.LGcs.SD

SpeechT5: Unified-Modal Encoder-Decoder Pre-Training for Spoken Language Processing

classification eess.AS cs.CLcs.LGcs.SD
keywords speechtextspeecht5encoder-decoderframeworklanguageprocessingunified-modal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Motivated by the success of T5 (Text-To-Text Transfer Transformer) in pre-trained natural language processing models, we propose a unified-modal SpeechT5 framework that explores the encoder-decoder pre-training for self-supervised speech/text representation learning. The SpeechT5 framework consists of a shared encoder-decoder network and six modal-specific (speech/text) pre/post-nets. After preprocessing the input speech/text through the pre-nets, the shared encoder-decoder network models the sequence-to-sequence transformation, and then the post-nets generate the output in the speech/text modality based on the output of the decoder. Leveraging large-scale unlabeled speech and text data, we pre-train SpeechT5 to learn a unified-modal representation, hoping to improve the modeling capability for both speech and text. To align the textual and speech information into this unified semantic space, we propose a cross-modal vector quantization approach that randomly mixes up speech/text states with latent units as the interface between encoder and decoder. Extensive evaluations show the superiority of the proposed SpeechT5 framework on a wide variety of spoken language processing tasks, including automatic speech recognition, speech synthesis, speech translation, voice conversion, speech enhancement, and speaker identification. We release our code and model at https://github.com/microsoft/SpeechT5.

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