Method of detecting a predetermined frequency band in an audio data signal, detection device and computer program corresponding thereto
US9431030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2012 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for detecting a predetermined frequency band in an audio data signal which has previously been coded according to a succession of data blocks, among which at least certain blocks contain respectively at least one set of spectral parameters representing a linear prediction filter. Such a method of detection implements, for a current block among the at least certain blocks and for which at least a plurality of spectral parameters of the set have been previously decoded, acts of: determining, among the plurality of previously decoded spectral parameters, the index of the first spectral parameter closest to a threshold frequency; calculating at least one criterion on the basis of the determined index; and deciding whether the predetermined frequency band is detected in the current block, as a function of the criterion calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.