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:
Jul. 13, 1993
Filed:
Sep. 30, 1991
Michael J Barry, W. Henrietta, NY (US);
Paul W Melnychuck, W. Henrietta, NY (US);
John A Weldy, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
The K most frequently occurring symbols in an image represented by an alphabet of N symbols are mapped to a set of K codewords. The length of each codeword is an inverse function of the frequency of occurrence of the corresponding symbol in the image and the longest codeword is of length d bits. The remaining N-K symbols are mapped in order of their magnitude to a set of supplementary codewords of a uniform maximum length D bits. The d most significant bits of each supplementary codeword form a prefix which is uniform within each set and specifies whether the corresponding symbol is positive or negative. The remaining or least significant D-d bits of each supplementary codeword comprise a suffix and are mapped in order of bit position to progressively more narrow ranges of symbol values of the remaining N-K symbols.