arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.09432eess.AScs.SD
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低资源带口音普通话语音识别的深度神经网络声学建模方法研究

Investigation of Deep Neural Network Acoustic Modelling Approaches for Low Resource Accented Mandarin Speech Recognition

Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences(中国科学院深圳先进技术研究院人机智能协同系统重点实验室);Cambridge University Engineering Dept(剑桥大学工程系);The Chinese University of Hong Kong(香港中文大学)

Xurong Xie, Xiang Sui, Xunying Liu, Lan Wang

AI总结:

针对低资源多口音普通话识别,本文比较多种DNN声学建模方案,并提出显式利用口音信息的改进MLAN tandem HMM系统,使字错误率相对基线绝对降低0.8%至1.5%。

摘要:

众所周知,普通话受到丰富地域口音的强烈影响,而每种口音的普通话语音资源都相当匮乏。因此,普通话语音识别中的一项重要任务,是恰当地建模由口音带来的声学变异。本文针对一系列基于深度神经网络(DNN)的声学建模技术,研究了口音信息的隐式与显式使用。同时,本文结合并比较了多种多口音建模方法,包括多风格训练、多口音决策树状态绑定、DNN tandem,以及多级自适应网络(MLAN)tandem隐马尔可夫模型(HMM)建模。在一个包含四种地域口音的低资源带口音普通话语音识别任务上,本文提出了一种显式利用口音信息的改进型MLAN tandem HMM系统;在经过序列级判别训练和自适应后,该系统在字错误率上显著优于与口音无关的基线DNN tandem系统,绝对降低0.8%至1.5%(相对降低6%至9%)。

英文摘要:

The Mandarin Chinese language is known to be strongly influenced by a rich set of regional accents, while Mandarin speech with each accent is quite low resource. Hence, an important task in Mandarin speech recognition is to appropriately model the acoustic variabilities imposed by accents. In this paper, an investigation of implicit and explicit use of accent information on a range of deep neural network (DNN) based acoustic modelling techniques is conducted. Meanwhile, approaches of multi-accent modelling including multi-style training, multi-accent decision tree state tying, DNN tandem and multi-level adaptive network (MLAN) tandem hidden Markov model (HMM) modelling are combined and compared in this paper. On a low resource accented Mandarin speech recognition task consisting of four regional accents, an improved MLAN tandem HMM systems explicitly leveraging the accent information was proposed and significantly outperformed the baseline accent independent DNN tandem systems by 0.8%-1.5% absolute (6%-9% relative) in character error rate after sequence level discriminative training and adaptation.

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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