A phase-modified algorithm(by means of STFT) for real-time realization of altering voice speed based on ADSP2188M is introduced. The result is a satisfaction fulfilling the need of high-quality time-scaling voice signal processing.

• 介绍了利用短时傅里叶分析,从频域的角度,采用相位调整法来对语音信号进行变速的实时处理,并用DSP芯片ADSP2188M进行了仿真,其结果较令人满意,基本达到了变速不变调、音质高保真的效果。