Method and device for adaptive bandwidth pitch search in coding wideband signals
US7260521B1 · kind B1 · utility
34Cited by
5References
63Claims
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Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0011
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling of the harmonic structure of the speech spectrum uses several forms of low pass filters applied to a pitch codevector, the one yielding higher prediction gain (i.e. the lowest pitch prediction error) is selected and the associated pitch codebook parameters are forwarded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.