A Computationally Efficient Method for Polyphonic Pitch Estimation
A Computationally Efficient Method for Polyphonic Pitch Estimation
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一种高效计算的复调音高估计方法
DOI：
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发表时间：
2009
影响因子：
1.9
通讯作者：
G. Zoia
中科院分区：
文献类型：
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作者：
R. Zhou;J. Reiss;M. Mattavelli;G. Zoia
本文提出了一种计算效率高的方法来估计复音基音周期。该方法采用快速共振时频图像（RTFI）作为基本的时频分析工具。该方法由两个主要阶段组成。首先，通过在音调能量谱中的简单峰值拾取过程获得初步音调估计。根据谐波分组原理，从原始RTFI能量谱计算出该谱。然后根据谱的不规则性和常用乐器上演奏的音符的谐波结构的知识来去除不正确的估计。与其他基于帧的多音调估计方法进行了比较，结果表明该方法具有较高的性能和计算效率。
This paper presents a computationally efficient method for polyphonic pitch estimation. The method employs the Fast Resonator Time-Frequency Image (RTFI) as the basic time-frequency analysis tool. The approach is composed of two main stages. First, a preliminary pitch estimation is obtained by means of a simple peak-picking procedure in the pitch energy spectrum. Such spectrum is calculated from the original RTFI energy spectrum according to harmonic grouping principles. Then the incorrect estimations are removed according to spectral irregularity and knowledge of the harmonic structures of the music notes played on commonly used music instruments. The new approach is compared with a variety of other frame-based polyphonic pitch estimation methods, and results demonstrate the high performance and computational efficiency of the approach.