摘要经验模态分解方法( Empirical Mode Decomposition,EMD)是Huang在1998年提出的一种新的信号处理方法。1999年,Huang又对它进行了一些改进。该方法自推出以来受到信号处理领域的重视,它自身存在的一些不足得到了相应的改进。如何利用程序开发出以EMD理论为核心的非线形非稳定信号处理系统,实现EMD理论潜在的实用价值和经济价值,是目前信号领域关注的热点。
针对传统共振峰检测工具在提取共振峰时会出现虚假峰值和共振峰合的问题,我们提出一种新的共振峰检测算法。新算法利用基于积分平均的经验模式分解频率分辨率较高的特性,将汉语语音信号中前三个共振峰自适应地分解到不同时间尺度的振动模式中去,接下来利用线性预测的方法从不同内禀模式函数中获取准确的瞬时共振峰。实验结果表明,新算法的检测结果优于传统共振峰检测工具。
关键词:经验模式分解(EMD),汉语,共振峰,线性预测(LPC)5209 毕业论文设计(论文)英文摘要
Title: Empirical mode decomposition based Chinese resonance peak detection algorithm
Abstract
Empirical mode decomposition method is introduced by Huang in 1998 a new signal processing method. In 1999, Huang made some improvement on it. The method since its introduction by the signal processing areas of importance to their own shortcomings, it got corresponding improvement. How to use the program developed by EMD theory as the core of the non-linear and non-stationary signal processing system, realizes the EMD theory potential practical value and economic value, is the focus of current signal.
To avoid the problems of illusive peaks and formant mergence that are usually encountered by the traditional detectors, we propose a new approach for detecting formants. In the method,we apply the empirical mode decomposition method to have formants separated into different intrinsic mode functions, and then, estimate each formant frequency from these functions by LPC. The results show the superiority of this proposed approach.
Keywords: Empirical Mode Decomposition(EMD),Chinese, Fundamental
Frequency, Formant,LPC
目 录