Signal processing method, signal output apparatus, signal processing apparatus, image processing apparatus, and image forming apparatus
US7502143B2 · kind B2 · utility
0Cited by
21References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | May 31, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10024
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A pseudo-random number generator comprises a controller, a plurality of LFSRs, a FIR filter and a normalizer. The pseudo-random number generator initializes the LFSRs in such a manner that each LFSR has a predetermined phase difference with the other LFSRs, sets the coefficient of the FIR filter in accordance with the desired frequency characteristic of a noise signal, and sets a parameter in the normalizer. The operation of the LFSRs is started, thereby acquiring a noise signal having the desired frequency characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.