Patent ID: 6560175
Filing Date: 2003-05-06
Classification: G11B

Abstract:
An information reproducing apparatus comprising:a rotating portion to rotate an information recording medium on which information has been recorded by wobbling borders on both sides of a track with different phases; a beam irradiating portion for irradiating a beam spot on said track of said information recording medium; a photodetector for receiving a reflected beam of said beam spot from said information recording medium; detection means for detecting a composite waveform including waveforms on said borders on both sides from the received beam intensity of said photodetector; reference signal generating means for generating two reference signals respectively synchronized with the phases of the wobbling of said borders on both sides; and information reproducing means for separately reproducing information of the wobbling waveform of said borders on both sides by multiplying said composite waveform by said two reference signals respectively.