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公开(公告)号：US5567901A
公开(公告)日：1996-10-22
申请号：US374110
申请日：1995-01-18
CPC分类号： G10H3/125 , G10H1/20 , G10H5/005 , G10H7/08 , G10H2210/066 , G10H2240/056 , G10H2250/285 , G10H2250/631
摘要： A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.
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2.发明授权Method and apparatus for changing the timbre and/or pitch of audio signals 失效用于改变音频信号的音色和/或音调的方法和装置
公开(公告)号：US5641926A
公开(公告)日：1997-06-24
申请号：US720447
申请日：1996-09-30
CPC分类号： G10H3/125 , G10H1/20 , G10H5/005 , G10H7/08 , G10H2210/066 , G10H2240/056 , G10H2250/285 , G10H2250/631
摘要： A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.
摘要翻译： 用于移位输入信号的音色和/或音调的方法以第一速率对输入信号进行采样，并将采样存储在存储器缓冲器中。 数字信号处理器以与初始采样输入音符的第一速率不同的速率重新采样存储的输入信号，并将再采样的输入信号存储在第二存储器缓冲器中。 音调移位器通过用窗函数周期性地缩放重新采样的输入信号来移动输入信号的音调，以产生输出信号。 通过窗口函数复制采样数据的速率决定了输出信号的间距。
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