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:
Oct. 03, 1995
Filed:
Sep. 20, 1993
Charles C Ormsby, Andover, MA (US);
Stephen W Boone, Beverly, MA (US);
Clyde D Hardin, Jr, Reading, MA (US);
George S Zabele, North Reading, MA (US);
The Analytic Sciences Corporation, Reading, MA (US);
Abstract
Continuous tone images, represented by original data files are compressed by (1) transforming by a lapped orthogonal transform the original file of data to generate a transform file of coefficients, (2) quantizing the transform coefficients, and (3) coding the quantized values to generate a compressed data file, the lapped orthogonal transform being arranged to compute all transform coefficients by means only of bit shifts, negations, and adds. In another aspect, the quantization and coding are performed on groups of transformed coefficients.