Patent ID: 6707780
Filing Date: 2004-03-16
Classification: G11B

Abstract:
A reproducing apparatus that reproduces a recording medium having tracks on which information is recorded and pre-information provided on a side of the tracks, said apparatus comprising:an optical beam section adapted to radiate an optical beam onto the recording medium; a light receiving section having a first light receiving portion and a second light receiving portion divided by a division line which is optically in parallel with a tangential direction of the tracks and receives the optical beam reflected by the recording medium; a first amplifying section adapted to amplify a first output signal outputted from said first light receiving portion; a second amplifying section adapted to amplify a second output signal outputted front said second light receiving portion; a generating section adapted to generate a pit signal indicating whether the optical beam received by said light receiving section corresponds to a pit recorded on the track, or not; and a detecting section adapted to detect the pre-information on the basis of outputs of said first and second amplifying section; wherein said first and second amplifying sections amplify the first and second output signals at a higher gain when the optical beam corresponds to the pit than a gain when the optical beam does not correspond to the pit, on the basis of the pit signal, respectively.