Method for performing a domain transformation of a digital signal from the time domain into the frequency domain and vice versa
US8126950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2004 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Jan 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for performing a domain transformation of a digital signal from the time domain into the frequency domain and vice versa, the method including performing the transformation by a transforming element, the transformation element comprising a plurality of lifting stages, wherein the transformation corresponds to a transformation matrix and wherein at least one lifting stage of the plurality of lifting stages comprises at least one auxiliary transformation matrix and a rounding unit, the auxiliary transformation matrix comprising the transformation matrix itself or the corresponding transformation matrix of lower dimension. The method further comprising performing a rounding operation of the signal by the rounding unit after the transformation by the auxiliary transformation matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.