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:
Jul. 13, 2004
Filed:
May. 23, 2001
Philip J. Armitage, Manchester, GB;
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A method of determining interrupts in data on an optical disc, the data supported in a signal envelope subject to variation by mirror modulation and said interrupts. The method comprises the steps of (A) filtering the signal envelope to generate a first signal; (B) re-biasing the first signal to produce an intermediate signal having voltage swings attributable to the mirror modulation; (C) defining a slice level below a reference level to sample the mirror modulation to produce a mirror signal; (D) slicing the intermediate signal to generate the mirror signal containing a pulse resulting from a level transition through the slice level associated with re-biasing of the positive transition component; and (E) registering the presence of the pulse during the on-track mode of operation to identify the interrupt in data on the optical disc.