Method and system of Chinese speech pitch extraction
US6721699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Apr 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/935
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for Chinese speech pitch extraction is disclosed. The method and system for Chinese speech pitch extraction comprises: pre-computing an anti-bias auto-correlation of a Hamming window function; for at least one frame, saving a first candidate as an unvoiced candidate, and detecting other voiced candidates from the anti-bias auto-correlation function; and calculating a cost value for a pitch path according to a voiced/unvoiced intensity function based on the unvoiced and voiced candidates, saving a predetermined number of least-cost paths, and outputting at least a portion of contiguous frames with low time delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.