Video signal filtering with temporally spaced samples in time past
US5694177A · kind A · utility
4Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Oct 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A group delay of a noise-reducing median filter for video or a video FIR filter is reduced by transferring filter contributions of fields in "time forward" to fields in "time past" with respect to an output sample point. No significant impairment is introduced by this time asymmetry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.