Method and apparatus for processing picture signals having interlaced field scanning
US4937667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S348/911
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
With interlaced field scanned TV, a point (P) in a field at time (t+1) is determined on the basis of points situated in said field on the same vertical (C and D), and from points situated in the fields which are adjacent in time (t and t+2). The invention provides for multi-gradient motion detection, i.e. relating not only to the points on the same vertical (C and D), and to the points (A and B) having the same position as the point (P) but in the adjacent fields, but also on the basis of points (E, F, G, and H) which are vertically adjacent to the points (A and B) in the adjacent fields and occupying the same fields. Pairs of such points on either side of the point (P) can thus be defined. Interpolation is performed along each of the available pairs, and the interpolations are weighted as a function of the corresponding gradient. Hierarchical partial interpolation is performed for each of the pairs taking account of whether the point (P) is in the presence of a horizontal outline, or a quasi-horizontal outline, or no such outline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.