Pitch shifting apparatus and method
US6421637B1 · kind B1 · utility
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4Claims
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Key dates
| Filing date | Oct 20, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Oct 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In a pitch shifting method, an input sound signal is stored into a memory, and a period of the input sound signal is extracted. Then, a sawtooth wave is produced whose amplitude is set to a value which is integer times the extracted period. A read address is designated based on the sawtooth wave, and the input sound signal is read from the memory using the designated read address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.