论文标题
阶段辅助码器做对了
Phase Vocoder Done Right
论文作者
论文摘要
相位声码器（PV）是一种用于处理音频信号的广泛扩展技术。它采用短时傅立叶变换（STFT）分析模化合成循环，通常用于通过使用不同的时间步骤进行STFT分析和合成的时间来缩放信号。用于此目的的PV的主要挑战是校正STFT阶段。在本文中，我们介绍了一种基于相位梯度估计及其集成的新型相校正方法。该方法不需要明确的峰采摘和跟踪，也不需要检测瞬变及其单独的处理。然而，即使在极端的时间延长因素中，该方法也不会遭受典型的相位声码器工件的困扰。
The phase vocoder (PV) is a widely spread technique for processing audio signals. It employs a short-time Fourier transform (STFT) analysis-modify-synthesis loop and is typically used for time-scaling of signals by means of using different time steps for STFT analysis and synthesis. The main challenge of PV used for that purpose is the correction of the STFT phase. In this paper, we introduce a novel method for phase correction based on phase gradient estimation and its integration. The method does not require explicit peak picking and tracking nor does it require detection of transients and their separate treatment. Yet, the method does not suffer from the typical phase vocoder artifacts even for extreme time stretching factors.
