Device for perceptual weighting in audio encoding/decoding
US8260620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2007 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Nov 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hierarchical audio coder for use in a frequency band divided into adjacent first and second sub-bands, the coder including: a core coder (305) for coding an original signal in the first sub-band of the frequency band; a stage (306) for calculating a residual signal (e) from the original signal and the signal from the core coder; a device (307) for perceptually weighting the residual signal (e). The perceptual weighting device includes a perceptually weighted filter (307) with gain compensation adapted to realize spectral continuity between the output signal of the perceptually weighted filter with gain compensation and the signal in the second sub-band. Application to transmitting and storing digital signals, such as audio-frequency speech, music, etc. signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.