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. 01, 1987
Filed:
Jun. 18, 1985
Bella Bose, Corvallis, OR (US);
Der J Lin, Corvallis, OR (US);
Other;
Abstract
A method and system for employing systematic check codes for detecting a predetermined number of unidirectional errors in the transmission of data. In accordance with the invention check codes are produced from information codes such that for all possible pairs of (n+m)-bit data words formed by a predetermined set of n-bit information codes and corresponding m-bit check codes, either the pair of words is unordered or the Hamming distance between the data words of the pair is greater than or equal to t+1, where t is the maximum number of unidirectional errors that can be detected. First check codes are generated at a data source, second check codes are generated from the received information code at a data sink, and the received first check codes are compared with the second check codes to determine the existence of a disparity. Sequential and combinational logic circuits are provided for producing check codes having two or more bits.