Device and method for transforming a digital signal
US6741666B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2000 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jan 11, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a device by which original digital signals are analysis-filtered, where the original digital signals include original samples representing physical quantities, and where the original samples are transformed by successive calculation steps into high and low frequency output samples. Any sample calculated at a given step is calculated by a predetermined function of the original samples and/or previously calculated samples, where the samples are ordered by increasing rank. The signal is processed by successive input blocks of samples, where the calculations made on an input block under consideration take into account only the original or calculated samples belonging to the input block under consideration, and where the input block under consideration and the following input block overlap over a predetermined number of original samples. Output blocks are formed, where each output block corresponds respectively to an input block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.