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. 13, 2004
Filed:
Apr. 06, 2001
Applicant:
Inventors:
Robert Philip Morling, Malahide, IR;
Andrew Hana, Bradley Stoke, GB;
Assignee:
Hewlett-Packard Development Company, L.C., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 2/014 ;
U.S. Cl.
CPC ...
G11B 2/014 ;
Abstract
A method of encoding a digital data stream for writing to a digital storage (DDS) format tape data storage medium comprises writing a byte stream to a preamble region, immediately preceding a user data region. The byte stream has a power spectrum substantially similar to a power spectrum of the user data region. An automatic gain control circuit responds to the preamble data stream in a substantially similar fashion to its response to the user data stream.