DATENAUFZEICHNUNGSMEDIUM, DATENAUFZEICHNUNGSGERÄT, DATENWIEDERGABEGERÄT UND DATENAUFZEICHNUNGS/WIEDERGABEGERÄT

In an information recording medium (1) from which information recorded on each pit is reproduced by an optical detection system (3) that obtains a reproduced signal corresponding to each pit by scanning the information recording medium along pit rows by a light beam, data of high recording density can be accurately reproduced by a simple arrangement by shifting in a step-wise fashion edge positions of an information pit from a predetermined reference position in response to digital information to be recorded within a range corresponding to a predetermined shift period smaller than a transition period of a reproduced signal determineed in response to the given or inherent transfer characteristic of the optical detection system (3). The information reproducing apparatus comprises clock generating means (7), lower detection means and judging means. Therefore, a nonlinear intersymbol interference can be reduced without enphasizing a noise component.