Analysis of Musical Instrument Sounds by Source-Filter-Decay Model
Analysis of Musical Instrument Sounds by Source-Filter-Decay Model
复制标题
通过源滤波器衰减模型分析乐器声音
DOI：
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发表时间：
2007
期刊：
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通讯作者：
Anssi Klapuri
中科院分区：
文献类型：
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作者：
Anssi Klapuri
本文提出了一种乐器声音时变谱能量分布的建模方法。该模型由一个激励信号，一个身体响应滤波器，和一个损耗滤波器，实现了频率依赖性衰减。这三个部分进一步表示为一个线性模型，允许控制所涉及的参数的数量。提出了一种方法，估计所有的模型参数联合，考虑到加性噪声。该方法进行评估，通过测量其准确性，代表33种乐器，并通过测试其有用性，在提取一个乐器的旋律线从复调音频信号。
This paper proposes a way of modelling the time-varying spectral energy distribution of musical instrument sounds. The model consists of an excitation signal, a body response filter, and a loss filter which implements a frequency-dependent decay. The three parts are further represented with a linear model which allows controlling the number of parameters involved. A method is proposed for estimating all the model parameters jointly, taking into account additive noise. The method is evaluated by measuring its accuracy in representing 33 musical instruments and by testing its usefulness in extracting the melodic line of one instrument from a polyphonic audio signal.