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:
Apr. 25, 1995
Filed:
Mar. 03, 1993
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An apparatus, having a spindle motor for rotating a circular optical disk, for recording information on the optical disk rotated by the spindle motor, and reproducing information recorded on the optical disk, wherein whether the recording scheme of the optical disk is a mark interval or mark length recording scheme is discriminated, and information is recorded or recorded information is reproduced while the optical disk is rotated at a rotational speed corresponding to the discriminated recording scheme. In an apparatus for recording/reproducing information in accordance with both the mark interval and mark length recording schemes, a signal amplifier, a demodulation circuit, a modulation circuit, an error correction circuit, a buffer memory, an interface circuit, and the like can be commonly used between the two recording schemes, thereby decreasing the number of signal processing circuits.