Television – Format conversion – Changing number of fields for standard conversion
Patent
1992-04-15
1995-06-27
Kostak, Victor R.
Television
Format conversion
Changing number of fields for standard conversion
348911, 348452, H09N 701
Patent
active
054283990
ABSTRACT:
Images may be stored on film or on one of the TV/video standards. Film comprises a sequence of frames each of which corresponds to the same point in time. Video, however, comprises a sequence of frames each comprising an interlace of 2 fields which successively scan the image and thus each field does not correspond to the same point in time.
Due to these inherent differences, when converting from film to one of the TV standards and between the TV standards when at least part of the image originates on film, distortions are introduced particularly when there are any objects moving in the image.
The present invention includes a vector motion estimator (10) providing motion vectors which are indicative of any objects moving and are used to manipulate the standards converter (8) so as to accommodate for the moving objects.
REFERENCES:
patent: 4864398 (1989-09-01), Avis et al.
patent: 4998167 (1991-03-01), Jagua
patent: 5036393 (1991-07-01), Samad et al.
patent: 5221966 (1993-06-01), Clayton
BBC Reasearch Department No. RD 1987/11 (1987)/.
BBC Research Department Report "Digital Standards Conversion: Interpolation Theory and Aperture Synthesis", undated.
Shimano et al. publication, undated.
Beanland "ISIS" publication, undated.
Mason Brian R.
Robinson Roger N.
Kostak Victor R.
Vistek Electronics Limited
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