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:
Apr. 24, 1990
Filed:
Sep. 27, 1988
Christian Remus, Joinville-le-Pont, FR;
Olivier Chantelou, Paris, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A digital video signal encoding arrangement comprising a correlation reducing circuit receiving said digital signals which are representative of the luminance or the chrominance of a certain number of elements of a picture which has been divided into blocks, a scanning conversion circuit (30), a normalization circuit (50), a quantizing circuit (60), a circuit (70) for encoding said quantized values and a rate controlling circuit (80). This arrangement is characterized in that its normalization circuit itself comprises: (a) a weighting coefficient storage memory (51) which is addressed on the one hand by an index i indicating the position in the current block, and on the other hand by a value representative of the activity of this block; (b) a standard calculating circuit (52) on the basis of a mean standard value produced by the rate controlling circuit and also on the weighting coefficient supplied; (c) a circuit (59) for dividing by the coefficient K.sub.i the output of said standard calculating circuit.