Optical disc apparatus with selective track accessing using a correction scale value

摘要: An optical disc apparatus is disclosed, which comprises an head for obtaining information signal from through photoelectric conversion and accessing section moving the to a position corresponding desired track of disc. When moved in radial direction disc, obtained therefrom binarized by binarization coder obtain binary pulse signal. Noise components contained that are introduced scars or scratches dust particles attached thereto removed Signal innermost detected as representing reference A correction scale value difference between initial detector. access determined designated number.