Improving Time-Scale Modification of Music Signals Using Harmonic-Percussive Separation
Improving Time-Scale Modification of Music Signals Using Harmonic-Percussive Separation
复制标题
DOI：
10.1109/lsp.2013.2294023
复制
发表时间：
2014
影响因子：
3.9
通讯作者：
Jonathan Driedger;Meinard Müller;Sebastian Ewert
中科院分区：
文献类型：
--
作者：
Jonathan Driedger;Meinard Müller;Sebastian Ewert
音乐信号的时间尺度修改（TSM）的一个主要问题是，瞬态的音乐信号往往是感知退化。为了防止这种退化，一些TSM方法试图明确识别输入信号中的瞬变，并以特殊的方式处理它们。然而，由于两个原因，这种方法是有问题的。首先，瞬态检测中的错误对最终TSM结果有直接影响，其次，瞬态的感知透明保存到目前为止不是一个微不足道的任务。在本文中，我们提出了一个TSM的方法，处理瞬态隐式的第一次分离成一个谐波分量，以及一个典型的包含瞬态的谐波分量的信号。虽然谐波分量是使用大帧尺寸用相位声码器方法修改的，但类噪声的谐波分量是使用短帧尺寸用简单的时域相加技术修改的，这在没有任何显式瞬态检测的情况下高度保留了瞬态。
A major problem in time-scale modification (TSM) of music signals is that percussive transients are often perceptually degraded. To prevent this degradation, some TSM approaches try to explicitly identify transients in the input signal and to handle them in a special way. However, such approaches are problematic for two reasons. First, errors in the transient detection have an immediate influence on the final TSM result and, second, a perceptual transparent preservation of transients is by far not a trivial task. In this paper we present a TSM approach that handles transients implicitly by first separating the signal into a harmonic component as well as a percussive component which typically contains the transients. While the harmonic component is modified with a phase vocoder approach using a large frame size, the noise-like percussive component is modified with a simple time-domain overlap-add technique using a short frame size, which preserves the transients to a high degree without any explicit transient detection.