Audio decoding apparatus and method for band expansion with aliasing suppression
US7058571B2 · kind B2 · utility
47Cited by
7References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jul 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A wideband, high quality audio signal is decoded with few calculations at a low bitrate. Unwanted spectrum components accompanying sinusoidal signal injection by a synthesis subband filter built with real-value operations are suppressed by inserting a suppression signal to subbands adjacent to the subband to which the sine wave is injected. This makes it possible to inject a desired sinusoid with few calculations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.