AI 中文总结
介绍用于约鲁巴语的基于规则的双音素拼接语音合成器TTSYoruba，阐述其音系架构，包括声调处理等，还介绍正字法扩展，通过听众研究评估性能，为约鲁巴语语音合成及相关研究提供支持。
AI 中文摘要
我们展示了TTSYoruba，这是一个基于规则的约鲁巴语双音素拼接语音合成器，作为约鲁巴语个人名字开源字典的一部分在线部署。该系统以带声调标记的约鲁巴语文本为输入，通过将手工制作的音系规则系统应用于包含该语言中每个辅音 - 元音组合的五个声调变体的651个双音素单元的录音库来产生音频输出。我们详细描述了系统的音系架构，包括完整的声调文件选择逻辑、对三元鼻音歧义问题（口腔 /n/、鼻化元音和音节鼻音）的处理以及从平调输入推导上下文升降调。我们还提出，作为正字法贡献，采用在约鲁巴语音系转录中已有地位的变音符号和抑扬符作为标准单元音轮廓声调标记，并集成到TTS归一化管道和WriteYoruba键盘输入工具中。通过听众研究（N = 50）评估了系统性能，第6节给出了平均意见得分（MOS）的详细结果。关键词：约鲁巴语、文本到语音、低资源语言、双音素合成、轮廓声调、非洲语言自然语言处理、基于规则的合成
英文摘要
We present TTSYoruba, a rule-based concatenative diphone speech synthesizer for Yoruba, deployed at online as part of the YorubaName.com open dictionary of Yoruba personal names. The system takes tone-marked Yoruba text as input and produces audio output by applying a hand-crafted phonological rule system to a recorded inventory of 651 diphone units spanning five tonal variants of every consonant-vowel combination in the language. We describe the phonological architecture of the system in detail, including our complete tonal file-selection logic, our treatment of the three-way nasal disambiguation problem (oral /n/, nasalized vowel, and syllabic nasal), and the derivation of contextual rising and falling tones from level-tone input. We also present, as an orthographic contribution, the adoption of the caron and circumflex, which are symbols with prior standing in Yoruba phonological transcription, as standard single-vowel contour tone markers, integrated into the TTS normalization pipeline and the WriteYoruba keyboard input tool. The system's performance was evaluated through a listener study (N=50), with detailed results on Mean Opinion Scores (MOS) presented in Section 6. Keywords: Yoruba, text-to-speech, low-resource languages, diphone synthesis, contour tones, African language NLP, rule-based synthesis
CommentsCurrently under review at Speech Communication
