Apparatus for compensating a movement of a picture of television signal
US4731651A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1986 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Jul 25, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/014
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image movement correction is provided in a field conversion television system by deriving simultaneously two fields of a selected number of lines from an original single field and vertically shifting one of the derived fields by 0.5 lines. A movement vector is determined for each field and movement correction is performed based on a current field and a preceding field, in the case of a moving object in the image. If no moving object is present linear approximation is employed to correct for motion caused by the field number conversion. Two memory systems are provided for the two simultaneous fields and also to selectively obtain specific horizontal lines of the current and preceding fields, relative to both simultaneous derived fields. Ultimate selection of a field for display is based upon the detected movement vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.