Picture signal processing system including spatio-temporal filter
US4551753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1982 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Dec 9, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/503
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A picture signal processing for converting a wideband high quality picture signal between interlace and sequential scanning systems is effected through a spatio-temporal filter based on multi-dimensional coordinates consisting of at least vertical frequency and temporal frequency axes. A passing region of the spatio-temporal filter is restricted to lower regions of the multi-dimensional coordinates including an origin thereof for separating original picture signal components from unnecessary signal components generated by the scanning conversion in order to maintain the high picture quality. The performance of the spatio-temporal filter is improved in consideration of the motion of the picture and the ambiguous contour of the still picture which is caused by the scanning conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.