Patent ID: 6992956

Claim:
A disk reproducing apparatus, comprising: a rotating means for rotating a disk formed and recorded with an address and a predetermined mark along a track; an irradiating means for irradiating a laser beam along said track; a photo-detecting means for detecting a reflection light from said track; a first generating means for generating a formed and recorded component signal including an address component related to said address and a first predetermined mark component related to said predetermined mark on the basis of an output from said photo-detecting means; a gain adding means for adding a gain to said formed and recorded component signal; an address value detecting means for detecting an address value indicated by said address on the basis of said formed and recorded component signal to which said gain is added; a second generating means for generating a second predetermined mark component signal related to said predetermined mark on the basis of an output of said photo detecting means; an eliminating means for eliminating said first predetermined mark component from said formed and recorded component signal on the basis of said second predetermined mark component signal; a peak level detecting means for detecting a peak level of said formed and recorded component signal from which said first predetermined mark component is eliminated; and a gain adjustment means for adjusting said gain on the basis of said peak level.