一种高效的音频时延估计算法

An Efficient Audio Delay Estimation Algorithm

在音频信号处理中,歌曲音频由于发行版本的差异,原唱音频和伴奏音频存在一定的时延差异,增加音频管理和处理的难度和复杂性。针对基于Dynamic Time Warping(DTW)技术的时延估计方案的计算复杂高问题,提出基于互相关函数优化的时延估计算法。该算法提出基于FFT优化的互相关,能有效降低计算复杂度,实验结果表明所提算法不仅能保证音频时延估计的正确性和有效性,并能进一步减少运算时间,更适合实时性要求较高的场景。

Due to the publish version of music tracks, the delay between original mixture version and instrumental version, which is very common, make audio library management and processing more difficultly. While Dynamic Time Warping（DTW） based audio delay alignment estimation method, is very useful and robust, but also has high computation complexity. An efficient audio delay estimation algorithm based on FFT and across-function is proposed. Simulation results show the proposed method＇s high efficiency and effectiveness.