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:
Nov. 06, 2012
Filed:
Jun. 09, 2011
Hidetaka Kodama, Kanagawa, JP;
Hidetaka Kodama, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An information processing apparatus includes: a signal reproduction section configured to obtain a reproduced signal from a recording medium by radiating a laser beam emitted by a laser-beam source to the recording medium; and a high-frequency signal superposition section configured to superpose either a first high-frequency signal or a second high-frequency signal having a frequency higher than the frequency of the first high-frequency signal on a driving signal used for driving the laser-beam source, wherein, in a first signal reproduction operation, the high-frequency signal superposition section superposes the first high-frequency signal on the driving signal whereas, in a second signal reproduction operation to measure information on the amplitude of the reproduced signal, the high-frequency signal superposition section superposes the second high-frequency signal on the driving signal.