Method and apparatus for changing the timbre and/or pitch of audio signals
US5641926A · kind A · utility
23Cited by
22References
23Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2250/631
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.