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    • 2. 发明授权
    • Phase-vocoder pitch-shifting
    • 相位声码器音调转换
    • US06549884B1
    • 2003-04-15
    • US09399920
    • 1999-09-21
    • Jean LarocheMark Dolson
    • Jean LarocheMark Dolson
    • G10L1914
    • G10L19/26G10L21/003
    • A system for pitch-shifting an audio signal wherein resampling is done in the frequency domain. The system includes a method for pitch-shifting a signal by converting the signal to a frequency domain representation and then identifying a specific region in the frequency domain representation. The region being located at a first frequency location. Next, the region is shifted to a second frequency location to form a adjusted frequency domain representation. Finally, the adjusted frequency domain representation is transformed to a time domain signal representing the input signal with shifted pitch. This eliminates the expensive time domain resampling stage and allows the computational costs to become independent of the pitch modification factor.
    • 一种用于对音频信号进行音调移位的系统,其中在频域中进行重采样。 该系统包括通过将信号转换为频域表示然后识别频域表示中的特定区域来对信号进行音调移位的方法。 该区域位于第一频率位置。 接下来,将区域移动到第二频率位置以形成调整的频域表示。 最后,将经调整的频域表示变换为表示具有偏移音调的输入信号的时域信号。 这消除了昂贵的时域重采样级,并且允许计算成本独立于音调修正因子。