Apparatus and method applying adaptive spectral whitening in a high-frequency reconstruction coding system
US7433817B2 · kind B2 · utility
37Cited by
17References
13Claims
0Family size
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Key dates
| Filing date | Oct 12, 2005 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Apr 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilising high frequency reconstruction (HFR). It utilises adaptive filtering to reduce artifacts due to different tonal characteristics in different frequency ranges of an audio signal upon which HFR is performed. The present invention is applicable to both speech coding and natural audio coding systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.