| 一种新型音符起始点检测算法 |
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| 引用本文： | 桂文明,邵曦,刘睿凡. 一种新型音符起始点检测算法[J]. 计算机工程与应用, 2011, 47(24): 9-11. DOI: 10.3778/j.issn.1002-8331.2011.24.003 |
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| 作者姓名： | 桂文明 邵曦 刘睿凡 |
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| 作者单位： | 1.南京理工大学 计算机科学与技术学院，南京 210094 2.南京财经大学，南京 210046 3.南京邮电大学，南京 210003 |
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| 摘 要： | 提出一种利用乐音频率变化特征进行音符起始点检测的算法，该算法基于连续小波变换（CWT）对音乐信号进行分解，分解后的信号频率和乐音频率分布相同。从分解后的信号中提取音符起始点特征，使用双边指数光滑和移动窗口归一化算法优化检测函数，产生音符起始点。
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| 关 键 词： | 连续小波变换 双边指数光滑 移动窗口归一化 音符起始点 |
| 修稿时间： | |
New algorithm for note onset detection |
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| GUI Wenming,SHAO Xi,LIU Ruifan. New algorithm for note onset detection[J]. Computer Engineering and Applications, 2011, 47(24): 9-11. DOI: 10.3778/j.issn.1002-8331.2011.24.003 |
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| Authors: | GUI Wenming SHAO Xi LIU Ruifan |
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| Affiliation: | 1.School of Computer Science and Technology，Nanjing University of Science and Technology，Nanjing 210094，China 2.Nanjing University of Finance & Economics，Nanjing 210046，China 3.Nanjing University of Posts and Telecommunications，Nanjing 210003，China |
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| Abstract: | This paper proposes a new algorithm for note onset detection,which is based on the Continuous Wavelet Trans-form（CWT） and the music knowledge.The musical signals are decomposed into the frequencies whose distribution are identi-cal to music tones,and note onset features are extracted.The double side exponential smoothing method and normalization techniques based on moving window are employed to detect the onsets. |
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| Keywords: | continue wavelet transform double side exponential smoothing moving window normalization note onset detection |
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