Method and apparatus for implementing wavelet filters in a digital system
US6757326B1 · kind B1 · utility
14Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1998 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Dec 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2222/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital data system (100) provides 1-D, 2-D and 3-D capability and multi-band channel capability. Improved filter banks are created by generating a filter bank having an analysis portion and synthesis portion and obtaining wavelet coefficients (302) for each portion. The wavelet coefficients are expressed in a format capable of canonical signed digit (CSD) representation, such as integers (302). The canonical signed digit (CSD) representation is controlled by a value, N, selected to control resolution of the CSD coding. Optimized CSD-coded wavelet coefficients are used as filters for data signals (318).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.