Geometric transcoding of a digital signal
US6778608B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for the geometric transcoding of a compressed data file containing a digital signal of dimension N coded by means of a coding method including at least one step of spectral breakdown into frequency subbands of the digital signal (S). The method includes the steps of extracting symbols associated with the coefficients of the frequency sub-bands of the digital signal and applying a geometric transformation to the symbols. The method further includes the steps of updating N indicator or indicators representing a normal or reversed order of the symbols respectively in N direction or directions of the digital signal and reconstituting the digital signal coded by reversal of the extracting step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.