Method and apparatus for audio encoding and decoding using wideband psychoacoustic modeling and bandwidth extension
US7953605B2 · kind B2 · utility
12Cited by
5References
81Claims
0Family size
Inventors
Key dates
| Filing date | Oct 6, 2006 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Mar 31, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A novel bandwidth extension technique allows information to be encoded and decoded using a fractal self similarity model or an accurate spectral replacement model, or both. Also a multi-band temporal amplitude coding technique, useful as an enhancement to any coding/decoding technique, helps with accurate reconstruction of the temporal envelope and employs a utility filterbank. A perceptual coder using a comodulation masking release model, operating typically with more conventional perceptual coders, makes the perceptual model more accurate and hence increases the efficiency of the overall perceptual coder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.