通过渐进式残差提取,让模型同时学好语音的音高、说话人和内容信息。
Progressive Residual Extraction based Pre-training for Speech Representation Learning
- 设计两个轻量模块,逐步提取音高与说话人特征
- 用残差移除避免干扰,保持内容信息学习能力
- 可灵活组合不同层特征,适配各类语音任务
自监督学习(SSL)在语音处理中备受关注,在语音识别等语言任务上表现优异。然而,如何让预训练模型同时提升多种下游任务的性能——每项任务需要不同的语音信息——仍是重大挑战。为此,我们提出一种基于渐进残差提取的自监督学习方法(ProgRE)。具体地,在编码器结构的SSL骨干网络中引入两个轻量且专用的任务模块,增强对语音中音高变化和说话人信息的提取能力。为防止强化后的音高与说话人信息干扰内容信息的学习,我们从主分支中残差移除这两部分信息。主分支随后使用HuBERT的语音掩码预测进行训练,确保Transformer深层特征在内容类任务上的表现。由此可逐步提取音高、说话人与内容表示。最终,通过不同层权重组合多类表示,生成适用于各类下游任务的特定表示。实验表明,相比wav2vec2.0、HuBERT和WavLM等优秀方法,ProgRE在说话人识别、语音识别、情感识别、语音增强和语音转换等多个任务上均实现联合性能提升。
原文摘要 · Abstract (English)
Self-supervised learning (SSL) has garnered significant attention in speech processing, excelling in linguistic tasks such as speech recognition. However, jointly improving the performance of pre-trained models on various downstream tasks, each requiring different speech information, poses significant challenges. To this purpose, we propose a progressive residual extraction based self-supervised learning method, named ProgRE. Specifically, we introduce two lightweight and specialized task modules into an encoder-style SSL backbone to enhance its ability to extract pitch variation and speaker information from speech. Furthermore, to prevent the interference of reinforced pitch variation and speaker information with irrelevant content information learning, we residually remove the information extracted by these two modules from the main branch. The main branch is then trained using HuBERT's speech masking prediction to ensure the performance of the Transformer's deep-layer features on content tasks. In this way, we can progressively extract pitch variation, speaker, and content representations from the input speech. Finally, we can combine multiple representations with diverse speech information using different layer weights to obtain task-specific representations for various downstream tasks. Experimental results indicate that our proposed method achieves joint performance improvements on various tasks, such as speaker identification, speech recognition, emotion recognition, speech enhancement, and voice conversion, compared to excellent SSL methods such as wav2vec2.0, HuBERT, and WavLM.
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