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:
Sep. 06, 1988
Filed:
Nov. 21, 1986
Brian C Mortimer, Ottawa, CA;
Abstract
A method of, and apparatus for, encoding and decoding a sequence of data bytes to permit correction of bit errors occurring in one byte of the sequence, or two bytes providing that the two incorrect bytes can be identified (for example if the bytes show parity failure). Each data byte of the sequence comprises data bits and one parity check bit. To encode the sequence of data bytes two 'Code C' code bytes are determined from the data bytes, according to predetermined relationships, the data bytes and code bytes together forming an encoded data block. Also, there is provided a method of, and apparatus for, encoding and decoding a bundle of data blocks to permit correction of a number of bit errors occurring in bytes of the bundle. (Conceptually, the bundle of data blocks comprises a stack of data blocks, one positioned under another to form a two dimensional array of bytes.) Data block bundle encoding consists of separately encoding rows (i.e. horizontal encoding) and columns or pairs of columns (i.e. vertical encoding) of bytes of the bundle array with two 'Code C' code bytes.