提升语音转写准确率,精准捕捉口吃等不流畅现象。
SSDM 2.0: Time-Accurate Speech Rich Transcription with Non-Fluencies
- 用神经发音流构建可扩展的语音表征
- 全栈式对齐器捕获各类语音不流畅特征
- 利用大模型上下文学习能力增强发音纠错
语音是文本、语调、情感、口吃等多种层次的集合。超越单纯文字的自动语音转写仍属研究空白。本文聚焦于包含口吃现象的语音转写问题。现有最先进方法SSDM存在架构复杂、训练困难及局部序列对齐器性能不足等问题,且未探索大模型的上下文学习能力。为此,本文提出SSDM 2.0,主要贡献包括:(1)提出新型神经发音流,生成高可扩展的语音表征;(2)设计全栈式连接主义子序列对齐器,全面捕捉各类口吃现象;(3)引入误发音提示与一致性学习模块,利用大模型实现口吃相关的上下文发音学习;(4)构建并开源目前最大规模的共口吃语料库Libri-Co-Dys。在病理语音转写临床实验中,基于nfvPPA语料(以发音障碍为主),SSDM 2.0显著优于SSDM及其他所有口吃转写模型。
原文摘要 · Abstract (English)
Speech is a hierarchical collection of text, prosody, emotions, dysfluencies, etc. Automatic transcription of speech that goes beyond text (words) is an underexplored problem. We focus on transcribing speech along with non-fluencies (dysfluencies). The current state-of-the-art pipeline SSDM suffers from complex architecture design, training complexity, and significant shortcomings in the local sequence aligner, and it does not explore in-context learning capacity. In this work, we propose SSDM 2.0, which tackles those shortcomings via four main contributions: (1) We propose a novel \textit{neural articulatory flow} to derive highly scalable speech representations. (2) We developed a \textit{full-stack connectionist subsequence aligner} that captures all types of dysfluencies. (3) We introduced a mispronunciation prompt pipeline and consistency learning module into LLM to leverage dysfluency \textit{in-context pronunciation learning} abilities. (4) We curated Libri-Dys and open-sourced the current largest-scale co-dysfluency corpus, \textit{Libri-Co-Dys}, for future research endeavors. In clinical experiments on pathological speech transcription, we tested SSDM 2.0 using nfvPPA corpus primarily characterized by \textit{articulatory dysfluencies}. Overall, SSDM 2.0 outperforms SSDM and all other dysfluency transcription models by a large margin. See our project demo page at \url{https://berkeley-speech-group.github.io/SSDM2.0/}.
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