The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2006
Filed:
Jul. 31, 2000
Pierre Gautier, Nogent-sur-Marne, FR;
Sandra Del Corso, Clamart, FR;
Isabelle Lemaguet, Paris, FR;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to the processing of video signals prior to encoding or other compression operations, and, more particularly, to a method for encoding video signals corresponding to a sequence of frames each of which consists of two fields Fand F. The proposed method comprises the steps of receiving successive frames of an input video signal and delaying them with at least a 'two fields' duration delay, and detecting any dominance change and adjusting said delay. When a change from an Fdominance to an Fdominance is detected, the first field of the first Fdominant frame is suppressed, and said delay is decreased by a quantity equal to 'one field' duration; when a change from an Fdominance to an Fdominance is detected, the last field of the last Fdominant frame is repeated, and the delay is further increased by a quantity equal to “one field” duration. The invention also relates to a method for encoding a sequence of frames including either video-type images or film-type images, and to an encoding system that carries out said method by incorporating the first solution hereinabove presented. If a sequence of film-type is detected, the inverse 3:2 pull-down technique is applied on the input frames, while in the opposite case, said technique is de-activated and replaced by said first solution: preprocessing according to the type of dominance change.