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. 01, 1997
Filed:
Mar. 27, 1995
Charles Edward Boice, Endicott, NY (US);
John Mark Kaczmarczyk, Endicott, NY (US);
Agnes Yee Ngai, Endwell, NY (US);
Robert Leslie Woodard, Newark Valley, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a digital video encoder processor for discrete cosine transform encoding. The discrete cosine transform encoding includes the encoding steps of (1) determining the discrete cosine transform field or frame type, (2) addressing individual pixels as either (i) vertically adjacent pixels on consecutive Odd and Even field lines, or (ii) vertically adjacent pixels on consecutive Odd field lines, then consecutive Even field lines; or (iii) vertically adjacent pixels on consecutive Even field lines, then consecutive Odd field lines. These subtractions may be performed between (i) consecutive lines, (ii) odd lines, or (iii) even lines. The next step is finding the smallest variance of the above subtractions to determine the discrete cosine transform coding type. The subtractions are carried out in a dynamically partitionable processor having a plurality of datapaths. The datapaths are partitionable by the action of running opcode into (i) a single wide datapath, and (ii) a plurality of narrow datapaths for calculating the absolute value of the difference between two pixels, and accumulating the results of the subtraction.