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发明申请
US20070240558A1 Method, apparatus and computer program product for providing rhythm information from an audio signal 有权
用于从音频信号提供节奏信息的方法，装置和计算机程序产品

Method, apparatus and computer program product for providing rhythm information from an audio signal
摘要：
An apparatus for providing a beat and tatum tracker includes an accent filter bank, a periodicity estimator, a period estimator and a phase estimator. The accent filter bank is configured to downsample an input audio signal. The periodicity estimator is configured to determine a periodicity based on the downsampled signal. The period estimator is configured to determine a period based on the periodicity. The phase estimator is configured to estimate a phase based on the period for determining beat and tatum times of the input audio signal.
摘要（中）：

一种用于提供拍子和纹身跟踪器的装置包括重音滤波器组，周期性估计器，周期估计器和相位估计器。 重音滤波器组被配置为对输入音频信号进行下采样。 周期性估计器被配置为基于下采样信号来确定周期性。 周期估计器被配置为基于周期性来确定周期。 相位估计器被配置为基于用于确定输入音频信号的节拍和纹波时间的周期来估计相位。

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