Hierarchical encoding/decoding device
US8374853B2 · kind B2 · utility
4Cited by
14References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 7, 2006 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Aug 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for coding a hierarchical audio signal, comprising, at least, a core layer using parametric coding by analysis by synthesis in a first frequency band, a band extension layer for widening said first frequency band into a second frequency band, or wideband. The system also comprises a wideband audio coding quality enhancement layer based on transform coding using a spectral parameter obtained from said band extension layer. Application to transmitting speech and/or audio signals over packet networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.