arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.08647eess.AScs.SD
收藏

计算机辅助语音训练中的语境感知语音优度

Context-aware Goodness of Pronunciation for Computer-Assisted Pronunciation Training

Johns Hopkins University(约翰斯·霍普金斯大学);Renmin University of China(中国人民大学)

Jiatong Shi, Nan Huo, Qin Jin

摘要:

发音错误检测是计算机辅助发音训练系统的重要组成部分。最先进的发音错误检测模型使用深度神经网络(DNN)进行声学建模,并使用基于发音良好度(GOP)的算法进行发音评分。然而,基于GOP的评分模型具有两个主要限制:即,(i)它们依赖于强制对齐,将语音分割成语音片段并独立地使用它们进行评分,这忽略了片段内音素之间的过渡;(ii)它们只关注语音片段,这没有考虑跨音素的上下文效应(如连音,省略,不完整的爆破音等)。在这项工作中,我们提出了上下文感知发音良好度(CaGOP)评分模型。特别地,两个因素,即过渡因素和持续时间因素被注入CaGOP评分。转换因子识别音素之间的转换,并将其应用于加权逐帧GOP。此外,提出了一种基于自我注意的语音时长建模方法,将时长因子引入评分模型。建议的评分模型显着优于基线,实现了20%和12%的相对改善GOP模型上的音素级和元音级的发音错误检测分别。

英文摘要:

Mispronunciation detection is an essential component of the Computer-Assisted Pronunciation Training (CAPT) systems. State-of-the-art mispronunciation detection models use Deep Neural Networks (DNN) for acoustic modeling, and a Goodness of Pronunciation (GOP) based algorithm for pronunciation scoring. However, GOP based scoring models have two major limitations: i.e., (i) They depend on forced alignment which splits the speech into phonetic segments and independently use them for scoring, which neglects the transitions between phonemes within the segment; (ii) They only focus on phonetic segments, which fails to consider the context effects across phonemes (such as liaison, omission, incomplete plosive sound, etc.). In this work, we propose the Context-aware Goodness of Pronunciation (CaGOP) scoring model. Particularly, two factors namely the transition factor and the duration factor are injected into CaGOP scoring. The transition factor identifies the transitions between phonemes and applies them to weight the frame-wise GOP. Moreover, a self-attention based phonetic duration modeling is proposed to introduce the duration factor into the scoring model. The proposed scoring model significantly outperforms baselines, achieving 20% and 12% relative improvement over the GOP model on the phoneme-level and sentence-level mispronunciation detection respectively.

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。

↑