Pitch-Scaled Spectrum Based Excitation Model for HMM-based Speech Synthesis

	Pitch-Scaled Spectrum Based Excitation Model for HMM-based Speech Synthesis
	Wen, Zhengqi; Tao, Jianhua; Pan, Shifeng; Wang, Yang; Zhengqi Wen
发表期刊	JOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGY
	2014-03-01
卷号	74 期号:3 页码:423-435
文章类型	Article
摘要	The speech generated by hidden Markov model (HMM)-based speech synthesis systems (HTS) suffers from a 'buzzing' sound, which is due to an over-simplified vocoding technique. This paper proposes a new excitation model that uses a pitch-scaled spectrum for the parametric representation of speech in HTS. A residual signal produced using inverse filtering retains the detailed harmonic structure of speech that is not part of the linear prediction (LP) spectrum. By using pitch-scaled spectrums, we can compensate the LP spectrum using the detailed harmonic structure of the residual signal. This spectrum can be compressed using a periodic excitation parameter so that it can used to train HTS. We define an aperiodic measure as the harmonics-to-noise ratio, and calculate a voicing-cut off frequency to fit the aperiodic measure to a sigmoid function. We combine the LP coefficient, pitch-scaled spectrum, and sigmoid function to create a new parametric representation of speech. Listening tests were carried out to evaluate the effectiveness of the proposed technique. This vocoder received a mean opinion score of 4.0 in analysis-synthesis experiments, before dimensionality reduction. By integrating this vocoder into HTS, we improved the sound of the synthesized speech compared with the pulse train excitation model, and demonstrated an even better result than STRAIGHT-HTS.
关键词	Speech Synthesis Hmm-based Speech Synthesis Parametric Representation Of Speech Excitation Model Pitch-scaled Spectrum
WOS标题词	Science & Technology ; Technology
关键词[WOS]	VOICED SPEECH ; WAVE-FORM ; ALGORITHM ; COMPONENTS ; SIGNALS
收录类别	SCI
语种	英语
WOS研究方向	Computer Science ; Engineering
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic
WOS记录号	WOS:000333206500012
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/40877
专题	多模态人工智能系统全国重点实验室_智能交互
通讯作者	Zhengqi Wen
推荐引用方式 GB/T 7714	Wen, Zhengqi,Tao, Jianhua,Pan, Shifeng,et al. Pitch-Scaled Spectrum Based Excitation Model for HMM-based Speech Synthesis[J]. JOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGY,2014,74(3):423-435.
APA	Wen, Zhengqi,Tao, Jianhua,Pan, Shifeng,Wang, Yang,&Zhengqi Wen.(2014).Pitch-Scaled Spectrum Based Excitation Model for HMM-based Speech Synthesis.JOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGY,74(3),423-435.
MLA	Wen, Zhengqi,et al."Pitch-Scaled Spectrum Based Excitation Model for HMM-based Speech Synthesis".JOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGY 74.3(2014):423-435.