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. 18, 2003
Filed:
Mar. 01, 1999
Thomas Conway, Limerick, IE;
Philip Quinlan, Longmont, CO (US);
STMicroelectronics N.V., , NL;
Abstract
The invention provides an apparatus for decoding a coded digital data sequence. The apparatus includes a first Viterbi decoder of a first response type, a first filter and a second filter. The first and second filters are coupled to receive decoded sequences from the first Viterbi decoder. The first Viterbi decoder generates a first decoded sequence from the coded digital data sequence. The first and second filters generate respective first and second error signals in response to receiving the first decoded sequence. The first and second error sequences indicate differences between the first decoded sequence and second and third decoded sequences, respectively. The second and third decoded sequences are probable sequences produced by Viterbi decoders of respective second and third response types in response to receiving the coded digital data sequence.