Abstract:
To effectively extract the pitch period, an improved wavelet transformation method is presented. On basis of wavelet filter, the frequency multiplication suppressed coefficients are added to remove most of the frequency multiplication errors. According to the voice, the system combines the linear prediction, which has a suitable order adjusting to the speech, to remove the format interference, while avoiding excessive damage to the pitch. Experimental results show the accuracy rate of the method is 97.8% at quite environment, and when the SNR is 0 dB, the one of it is 91.1%. The system has a good accuracy, robustness, and noise immunity.
Key words:
pitch extraction,
avelet transformation,
linear prediction
摘要： To effectively extract the pitch period, an improved wavelet transformation method is presented. On basis of wavelet filter, the frequency multiplication suppressed coefficients are added to remove most of the frequency multiplication errors. According to the voice, the system combines the linear prediction, which has a suitable order adjusting to the speech, to remove the format interference, while avoiding excessive damage to the pitch. Experimental results show the accuracy rate of the method is 97.8% at quite environment, and when the SNR is 0 dB, the one of it is 91.1%. The system has a good accuracy, robustness, and noise immunity.
关键词:
pitch extraction,
wavelet transformation,
inear prediction
CLC Number:
LI Kun, LIU Jia. Pitch Extraction Based on Wavelet Transformation nd Linear Prediction[J]. Computer Engineering, 2010, 36(10): 276-278.
李坤, 刘加. 基于小波变换和线性预测的基音提取[J]. 计算机工程, 2010, 36(10): 276-278.