Method and device for adaptive bandwidth pitch search in coding wideband signals
US7672837B2 · kind B2 · utility
6Cited by
6References
21Claims
0Family size
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Key dates
| Filing date | Aug 4, 2006 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Jun 11, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0011
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A 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.