Film grain generator
US9100647B1 · kind B1 · utility
3Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2008 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Dec 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
High-frequency noise is generated that approximates the appearance of traditional “film grain” for a digital video signal. By adding a relatively small amount of film grain noise, the video can be made to look more natural and more pleasing to the human viewer. The digital film grain generator can generate film grain in real-time. The generated film grain is preferably free from spatial or temporal patterns. Level adaptivity adjusts the amount of variation permitted for each pixel within a programmable range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.