Patent ID: 7142498
Filing Date: 2006-11-28
Classification: G11B

Abstract:
1. A recorded information reproducing apparatus for reproducing recorded information recorded on a recording medium, comprising: a main read portion for generating a main read signal based on amount of light that is reflected when irradiating main read beam light onto a recording track on said recording medium; a sub read portion for generating a sub read signal based on amount of light that is reflected when irradiating sub read beam light onto a position near said recording track onto which said main read beam light has been irradiated; a crosstalk detection portion for detecting a crosstalk component from an adjacent track that is superimposed on said main read signal, based on a level correlation between said main read signal and said sub read signal; and a subtraction portion for subtracting said crosstalk component from said main read signal to generate a read signal in which the crosstalk has been eliminated; wherein said crosstalk detection portion comprises a correlation offset portion for subtracting a predetermined offset value from said correlation value, said predetermined offset value being bigger than a value of autocorrelation due to an influence of leakage from said recording track to said adjacent track.