Patent ID: 7701816

Claim:
An information reproducing apparatus for reproducing information recorded on an information recording medium, on which a record mark having a variable length according to first data is formed at a displaced position to which the record mark is displaced in a direction crossing a reading direction of the record mark according to a wobble signal obtained by modulating second data in a predetermined modulating method, said information reproducing apparatus comprising: a reading device for reading the record mark recorded on said information recording medium; a read signal generating device for generating a read signal for indicating the length of the record mark on the basis of an output signal from said reading device; a first clock signal generating device for generating a first clock signal on the basis of the read signal; a wobble signal generating device for generating a wobble signal for indicating the displaced position of the read mark on the basis of the output signal from said reading device; a first data reproducing device for reproducing the first data from the read signal by using the first clock signal, and for outputting a synchronization signal obtained by extracting a synchronization pattern included in the reproduced first data; and a second data reproducing device for reproducing the second data from the generated wobble signal by using the first clock signal, said second data reproducing device comprising: a second clock signal generating device for generating a second clock signal synchronized with the first clock signal; and a delaying device for delaying the synchronization signal by a predetermined time length, the first data and the second data being recorded on the information recording medium such that the synchronization pattern does not agree with a timing of a trailing edge of said second clock signal by a predetermined number.