Apparatus and method applying adaptive spectral whitening in a high-frequency reconstruction coding system
US7003451B2 · kind B2 · utility
141Cited by
13References
19Claims
0Family size
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Key dates
| Filing date | Nov 14, 2001 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jul 11, 2023 |
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 utilizing high frequency reconstruction (HFR). It utilizes adaptive filtering to reduce artifacts due to different tonal characteristics in different frequency ranges of an audio signal upon which HFR is performed. Tie present invention is applicable to both speech coding and natural audio coding systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.