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:
Jun. 11, 2002
Filed:
Oct. 25, 2000
Charles H. Sobey, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method and apparatus for identifying a track ( ) of a rotating disk ( ) of a mass data storage device ( ) uses EPR4 data detection techniques. The values of the encoded track identification indicia are selected so that they have a distance between any two track identification codewords that is larger than the minimum distance of the codeset from which they were selected. The identification indicia ( ) are read from the disk ( ) using a read head ( ), and processed using EPR4 data equalization techniques in an EPR4 Viterbi detector ( ). The Viterbi detector ( ) may have a trellis in which data paths of minimum distance of the codeset from which the track identification indicia ( ) were selected do not exist. The Viterbi detector ( ) may be used also to detect data pulses ( ) by switching its mode of operation from a track identification mode to a data detection mode.