Audio signal coding device and audio signal coding method
US9384744B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Nov 27, 2012 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Aug 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio signal coding device divides a frequency spectrum obtained from an input digital signal to a plurality of bands, scales and quantizes divided frequency spectra based on a scalefactor of each of the bands and a common scale which is common to the plurality of bands, and codes quantized frequency spectra. The audio signal coding device includes a band number determination unit configured to calculate a number of coding bands for coding the quantized frequency spectra, and a common scale estimation unit configured to estimate the common scale in accordance with the number of coding bands.
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