DISCRIMINATING METHOD FOR OPTICAL RECORD MEDIUM AND DISCRIMINATING DEVICE FOR OPTICAL RECORD MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a discriminating device for an optical record medium and a discriminating method for an optical record medium which can discriminate an optical disk at high speed and surely. ;SOLUTION: The discriminating device is provided with a two shaft actuator 5, a spindle motor 2, a photo-detector 13 and an RF amplifier 16, an RF binarized signal counter 25 counting a binarized signal of a reproduced information signal for a period being proportional to one rotation such as multiple of integer or the reciprocal-of-an-integer multiple of one rotation of an optical disk 1, and a DVD/CD discriminating section 27 comparing a counted value with the prescribed reference value. When a counted value is larger than the reference value, a medium is discriminated as an optical record medium (DVD) having high density, and when a counted value is smaller than the reference value, it is discriminated as an optical recording medium (CD) having low density.;COPYRIGHT: (C)1999,JPO