US Patent 7426164 Disk kind identifying method and disk apparatus

Patent 7426164 was granted and assigned to Sanyo on September, 2008 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Sanyo

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7426164

Date of Patent

September 16, 2008

Patent Application Number

10660773

Date Filed

September 12, 2003

Patent Primary Examiner

‌

Thang V. Tran

Patent abstract

A disk apparatus is for a disk, and a DVD-RW or a DVD+RW can be mounted as the disk. For example, a wobble signal is detected on the basis of a laser beam reflected by a recording surface of the disk. A CPU determines whether a cycle of the wobble signal (wobble cycle) is 32 times or 186 times as long as a data cycle on the basis of a detection result of a detecting circuit. Then, when the wobble cycle is 186 times as long as the data cycle, the disk kind is identified as the DVD-RW, and when the wobble cycle is 32 times as long as the data cycle, the disk kind is identified as the DVD+RW.