Fast implementation for non-linear time-scaling of stereo signals
Fast implementation for non-linear time-scaling of stereo signals
复制标题
快速实现立体声信号的非线性时间缩放
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
J. Bello
中科院分区:
文献类型:
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作者:
Emmanuel Ravelli;M. Sandler;J. Bello
In this paper we present an improved implementation of Duxbury’s adaptive phase-vocoder approach for audio time-stretching using non-linear time-scaling and temporal masked phase locking at transients [1]. We show that the previous algorithm has some limitations, notably its slow implementation and its incapacity to deal with stereo signals. We propose solutions to this problems including: an improved transient detection, a much faster implementation using the IFFT for re-synthesis and a method for stretching stereo signals without artifacts. Finally, we provide some graphical results and quantitative measures to illustrate our improvements.