Support of a multichannel audio extension
US7627480B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | May 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and units supporting a multichannel audio extension in a multichannel audio coding system are shown. In order to allow an efficient extension of an available mono audio signal {tilde over (M)} of a multichannel audio signal L/R, it is proposed that an encoding end of the multichannel audio coding system provides dedicated multichannel extension information for lower frequencies of the multichannel audio signal L/R, in addition to multichannel extension information at least for higher frequencies of the multichannel audio signal L/R. This dedicated multichannel extension information enables a decoding end of the multichannel audio coding system to reconstruct the lower frequencies of the multichannel audio signal L/R with a higher accuracy than the higher frequencies of the multichannel audio signal L/R.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.