Method for tracking a pitch signal
US7251597B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2002 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Aug 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for tracking pitch signal, including receiving a detected pitch signal that consists of a succession of pitch values, and for each current pitch value in the detected signal perform the following steps: constructing sub-sequences of consistent pitch values from neighboring pitch values. Next, calculating significance of the sub-sequences, and selecting a sub-sequence or a collection of consistent subsequences with highest significance. If the current pitch value is not consistent with the sub-sequence with highest significance, smoothing the current pitch value by diving it or multiplying it by an integer value>1, so as to render it consistent with the sub-sequence with highest significance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.