王磊,刘加. 基于RFC模型的基频曲线导数域编码方法研究[J]. 中文信息学报, 2009, 23(6): 86-91.
WANG Lei, LIU Jia. The Derivative Domain Codes of Pitch Curse and Applications. , 2009, 23(6): 86-91.
基于RFC模型的基频曲线导数域编码方法研究
王磊,刘加
清华信息科学与技术国家实验室（筹) 清华大学电子工程系,北京100084
The Derivative Domain Codes of Pitch Curse and Applications
WANG Lei, LIU Jia
Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
Abstract：Fundamental frequency (or pitch), usually named as F0, is the vibration frequency of vocal cord during the production of voiced sounds. In a syllable or continuous voice paragraph, F0 changes with time and yields the fundamental frequency (or pitch) curves. It is particularly important to descript and investigate the F0 curve because it usually reflects the rhythm information, such as tone and stress. This paper first proposes a new method to describe F0 curve——the derivative domain codes, and then it discusses the role of the coding method on the rhythm in the evaluation of speech pronunciation. Experimental results show that the method can be used to evaluate the English prosody. The correlation coefficient between the subjective and objective scores of pitch extreme difference improves from 0.38 to 0.49. Keywordartifical intelligence;pattern recognition;pitch;derivative;codes;application
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