Video signal processing with added probabilistic dither
US5404427A · kind A · utility
16Cited by
62References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1992 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Dec 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system in which a characteristic of individual picture points is provided to an accuracy of m binary bits but conveyed by n bits, where n is less than m. The value of a lower order bit of the n bit signal is switched to cause said binary value to represent, for any one picture point, either a value above or a value below the original value. The new values are distributed without order among the picture points with a probability dependent upon the value of the (m-n) lowest order bits of the desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.