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:
Jan. 28, 2003
Filed:
May. 07, 1999
Jay N. Livingston, Lafayette, CO (US);
Cirrus Logic Inc., Austin, TX (US);
Abstract
In a sampled amplitude read channel for disk storage systems, a post processor is employed to correct errors in a preliminary sequence caused by the dominant error events of a trellis sequence detector. By correlating a sample error sequence with the dominant error events, error filters compute a Euclidean distance error metric between the samples sequence selected by the trellis sequence detector and the sample sequence that would have been selected if an error event did not occur. The minimum error metric is assigned to the symbols in the preliminary sequence that differ from the symbol sequence that would have been generated if the error event did not occur. After processing a predetermined number of the symbols in the preliminary sequence, the error metrics assigned, to the symbols are used to detect and correct error events in the preliminary sequence.