Apparatus and method for deciding adaptive noise level for bandwidth extension
US8296157B2 · kind B2 · utility
2Cited by
3References
13Claims
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Key dates
| Filing date | Mar 31, 2009 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Aug 24, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/10564
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for deciding an adaptive noise level for bandwidth extension are provided. The apparatus includes a noise level decider for deciding a high-band noise level for bandwidth extension according to tonality of an input signal, a pitch frequency analyzer for detecting a pitch frequency of the input signal and analyzing correlation between the detected pitch frequency and a frequency channel, and a noise level controller for adaptively controlling the decided high-band noise level based on the analyzed correlation of the pitch frequency and the frequency channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.