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:
Dec. 02, 1997
Filed:
Aug. 05, 1996
Thomas C Oliver, Fort Collins, CO (US);
Kraig A Proehl, Loveland, CO (US);
Leo J Embry, Fort Collins, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Detecting blank sectors in an optical disk is disclosed. Such detection operates by sampling a target data field of a sector on the optical disk and generating a read peak signal based upon the sampling. The read peak signal is then compared to a predetermined amplitude threshold. A counter is incremented if the read peak signal is less than the predetermined amplitude threshold. After the above steps are performed a predetermined number of times, the counter is compared to a predetermined sample threshold value. Then, the sector is interpreted as being blank if the counter is greater than the predetermined sample threshold value. If, instead, the counter is less than the predetermined sample threshold value, then the sector is interpreted as being non-blank.