Audio coding system using spectral hole filling
US7447631B2 · kind B2 · utility
143Cited by
40References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Oct 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Audio coding processes like quantization can cause spectral components of an encoded audio signal to be set to zero, creating spectral holes in the signal. These spectral holes can degrade the perceived quality of audio signals that are reproduced by audio coding systems. An improved decoder avoids or reduces the degradation by filling the spectral holes with synthesized spectral components. An improved encoder may also be used to realize further improvements in the decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.