Process and device for segmentation into sub-bands and for reconstruction of a digital signal, and corresponding device
US5610944A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 29, 1993 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Oct 29, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0273
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A process and device for segmentation into and reconstruction from sub-bands of a digital signal each sample of which are submitted to a parallel processing on a plurality of paths by prototype filtering modulated by a periodic function and sub-sampling by the number of sub-bands. A combination of a filtering of modified polyphase type and of a processing by frequency transform is therefor performed so as to deliver a sub-band signal for each path of corresponding rank. Reconstruction comprises in combination the dual steps of frequency transform and modified polyphase filtering so as to deliver a reconstructed digital signal. Corresponding modules for frequency transform and modifyed polyphase filtering are embodied through MOT or PRMF filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.