Audio signal discriminator and coder
US9620138B2 · kind B2 · utility
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1References
22Claims
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Key dates
| Filing date | May 7, 2015 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | May 7, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/81
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a codec and a discriminator and methods therein for audio signal discrimination and coding. Embodiments of a method performed by an encoder comprises, for a segment of the audio signal: identifying a set of spectral peaks; determining a mean distance S between peaks in the set; and determining a ratio, PNR, between a peak envelope and a noise floor envelope. The method further comprises selecting a coding mode, out of a plurality of coding modes, based at least on the mean distance S and the ratio PNR; and applying the selected coding mode for coding of the segment of the audio signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.