arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.18512cs.SDcs.AIcs.CLeess.AS
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表达性提示:改进零样本语音合成中的情感强度和说话人一致性

Expressive Prompting: Improving Emotion Intensity and Speaker Consistency in Zero-Shot TTS

Tianjin Key Laboratory of Cognitive Computing and Application, College of Intelligence and Computing, Tianjin University(天津大学智能与计算学部认知计算与应用天津市重点实验室);Kuaishou Technology Co., Ltd(快手科技有限公司);Institute of Artificial Intelligence, China Telecom(中国电信人工智能研究院);Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences(中国科学院深圳先进技术研究院);Huiyan Technology (Tianjin) Co., Ltd(慧眼科技(天津)有限公司)

Haoyu Wang, Chunyu Qiang, Tianrui Wang, Cheng Gong, Yu Jiang, Yuheng Lu, Chen Zhang, Longbiao Wang, Jianwu Dang

AI总结:

本文提出一种两阶段提示选择策略,通过评估提示的音调特征、感知音频质量和文本情感一致性,提升零样本语音合成的情感表达和说话人一致性。

摘要:

近期语音合成的进步使基于大型语言模型(LLM)的系统能够通过输入提示进行零样本生成,控制内容、音色、说话人身份和情感。然而,现有提示选择方法难以确保提示包含足够的稳定说话人身份线索和适当的情感强度指标,这对表达性语音合成至关重要。为此,我们提出了一种专门针对表达性语音合成的两阶段提示选择策略。在静态阶段(合成前),我们首先使用基于音调的音调特征、感知音频质量和由LLM评估的文本情感一致性来评估提示候选者。我们进一步在特定TTS模型下评估候选者,通过测量字符错误率、说话人相似性和合成语音与提示语音之间的情感相似性。在动态阶段(合成期间),我们使用文本相似性模型选择与当前输入文本最匹配的提示。实验结果表明,我们的策略有效选择了提示以合成高情感强度和稳健说话人身份的语音,从而实现更表达性和稳定的零样本TTS性能。音频样本和代码将在https://whyrrrrun.github.io/ExpPro.github.io/上提供。

英文摘要:

Recent advancements in speech synthesis have enabled large language model (LLM)-based systems to perform zero-shot generation with controllable content, timbre, speaker identity, and emotion through input prompts. As a result, these models heavily rely on prompt design to guide the generation process. However, existing prompt selection methods often fail to ensure that prompts contain sufficiently stable speaker identity cues and appropriate emotional intensity indicators, which are crucial for expressive speech synthesis. To address this challenge, we propose a two-stage prompt selection strategy specifically designed for expressive speech synthesis. In the static stage (before synthesis), we first evaluate prompt candidates using pitch-based prosodic features, perceptual audio quality, and text-emotion coherence scores evaluated by an LLM. We further assess the candidates under a specific TTS model by measuring character error rate, speaker similarity, and emotional similarity between the synthesized and prompt speech. In the dynamic stage (during synthesis), we use a textual similarity model to select the prompt that is most aligned with the current input text. Experimental results demonstrate that our strategy effectively selects prompt to synthesize speech with both high-intensity emotional expression and robust speaker identity, leading to more expressive and stable zero-shot TTS performance. Audio samples and codes will be available at https://whyrrrrun.github.io/ExpPro.github.io/.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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