Method and device for spectral reconstruction of an audio signal
US7720676B2 · kind B2 · utility
44Cited by
8References
21Claims
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Key dates
| Filing date | Mar 3, 2004 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Dec 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio signal encoded in the form of data is spectrally reconstructed so part of the frequency spectrum of the audio signal is decoded with a spectral band limiting encoder (i.e., a core encoder). The complementary part of the frequency spectrum of the audio signal is decoded with an extension encoder. Information representing at least one cut-off frequency of the signal decoded by the core decoder is used to select, from amongst the data to be decoded or the data decoded with the extension decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.