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:
Jul. 01, 2008
Filed:
Jul. 27, 2006
Chosaku Noda, Kawasaki, JP;
Yutaka Kashihara, Fuchu, JP;
Yutaka Okamoto, Chofu, JP;
Hideo Ando, Hino, JP;
Koichi Hirayama, Ichikawa, JP;
Chosaku Noda, Kawasaki, JP;
Yutaka Kashihara, Fuchu, JP;
Yutaka Okamoto, Chofu, JP;
Hideo Ando, Hino, JP;
Koichi Hirayama, Ichikawa, JP;
Kabushiki Kaisha Toshiba, Kawasaki-shi, JP;
Abstract
A reproduction signal evaluation method of this invention includes the step of obtaining a reproduction signal from an information recording medium on which digital information is recorded with record marks having different sizes, the step of obtaining the amplitude of a first reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the maximum size, the step of obtaining the amplitude of a second reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the second smallest size, the step of obtaining an evaluation value from the ratio of the amplitudes of the first and second reproduction signals, and the step of evaluating a characteristic of the reproduction signal on the basis of the evaluation value.