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:
Feb. 22, 2000
Filed:
Jan. 20, 1998
Applicant:
Inventors:
Philip A DesJardins, Nevada City, CA (US);
Ravi G Mantri, Grass Valley, CA (US);
Assignee:
3Com Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
708492 ;
Abstract
A method and device for calculating Cyclical Redundancy Checksums (CRC) used in error-detection codes. To calculate CRCs more quickly using a computer with memory access latency, a frame of data is partitioned into a plurality of sub-frames. A look-up table containing pre-computed CRC values is stored in computer memory and accessed during the CRC calculation of the sub-frames. The CRC of the sub-frames can then be calculated and combined to form the CRC of the frame of data. To speed the calculation, CRCs of a number of the sub-frames can be calculated simultaneously.