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:
Nov. 08, 2005
Filed:
Feb. 28, 2001
Sandra Del Corso, Calmart, FR;
Sandra Del Corso, Calmart, FR;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a method for encoding video signals corresponding to a sequence of frames constituted either from video-type images or film-type images. These film-type images are obtained by means of the 3:2 pull-down technique involving a subdivision of each film frame into two fields and a duplication of two fields within each group of four subdivided frames. The encoding step of the signals is preceded by a preprocessing step that includes thresholding the eight absolute values of the successive pixel-to-pixel differences between fields of the same parity. Measuring the density of '1' (resp. '0') per block of m×n pixels of the field structure leading to mark each pixel as 1 or 0. Detecting in any group of ten successive fields within the preprocessed signals thus obtained, the film pattern formed by the duplicated fields. Switching the preprocessed signals from a first encoding mode to a second one, when the film pattern is detected, or from the second one to the first one, when it is not detected.