Stack filter with one stage per bit
US5097433A · kind A · utility
8Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Jul 11, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0263
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A hierarchical stack filter performs nonlinear filtering operations such as median filtering and other rank-order filtering. The stack filter has a number of stages in the stack which equals the number of bits in the words of the input word sequence, and each filter of the stack receives as a first input signal a window of the input sequence. Each filter stage has an expansion input port and an expansion output port. Each filter stage calculates a residue and couples the residue from its expansion output port to expansion input port of the filter stage of next lesser significance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.