Optical disk medium and a signal reproducing method

Optical disk medium of the present invention has at least one zone composed of a plurality of track groove formed in the CAV format, each of the plurality of tracks grooves, have a wobbling structure formed from the fundamental wave of a single cycle and, information to the wobbling structure is recorded. Wherein at least in one zone is different only always 90 ° to one another the fundamental wave of the phase to be formed is the wobbling structure of the track grooves adjacent to each other, as a result, the crosstalk in the detection of information recorded in the wobbling structure but it does not affect.