Information recording medium, and information reproducing apparatus and method

摘要

On a disc master DS, a record mark having a variable length according to the first data is formed at a displaced position to which the record mark is displaced, in a direction crossing the reading direction thereof, according to a wobble signal obtained by modulating the second data in a predetermined modulating method. The original data is recorded in such a manner that the original data is divided into the first data and the second data.