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.

翻译：电解码器(PV)是处理音频信号的一个广泛推广的技术,它使用短时间的傅里叶变换(STFT)分析修改合成环,通常用于通过使用不同时间步骤分析和合成来计算信号的时间尺度。为此目的使用的光电转换的主要挑战是纠正STFT阶段。在本文件中,我们采用了基于阶段梯度估计及其集成的阶段修正新颖方法。这种方法不需要明确的峰值采集和跟踪,也不需要探测中继器及其单独处理。然而,即使在极端时间拉伸因素下,该方法也并不因典型的电解码器工艺品阶段而受到影响。