摘要
对于瞬态声的分类识别,传统的基于时频分析的特征提取方法存在缺陷。考虑到音色特征在环境声分类中的优势,以矩形板冲击声为对象,研究用音色特征分类瞬态声的可行性及效果。针对传统美尔频率倒谱系数提取过程中的不足,提出一种用小波包变换代替傅里叶变换的改进方法,分析了改进后特征及特征组合方法在矩形板材料识别中的效果。理论分析和实验结果证实了所选特征及方法的有效性。
For transient sound classification, the traditional feature extraction method based on time-frequency analysis is insufficient. In view of the advantage of timbre features in environmental sound classification, the feasibility and effect of timbre features in transient sound classification for impact sounds from rectangular plates is investigated in this study. Considering the deficiency of traditional Mel-Frequency Cepstrum Coefficient （MFCC） , an improved method using wavelet packet transform instead of Fourier transform is presented. The effect of the improved feature and features combination method is analyzed. The theoretical analysis and experimental results show that the selected features and method are effective.
出处
《电声技术》
2013年第5期32-37,共6页
Audio Engineering
基金
国家自然科学基金项目(11074202)
关键词
音色特征
冲击声
小波包变换
特征提取
timbre feature
impact sound
wavelet packet transform
feature extraction
