Patent ID: 8107341
Filing Date: 2012-01-31
Classification: G11B

Abstract:
1. An information reproducing apparatus, comprising: a judging device for judging whether or not a read signal read from a recording medium satisfies a desired reproduction property; a correcting device for correcting waveform distortion occurring in a read signal corresponding to at least a long mark, of the read signal if it is judged by said judging device that the read signal does not satisfy the desired reproduction property, said correcting device configured to correct the waveform distortion occurring in the read signal corresponding to synchronization data, the synchronization data being used to read user data included in record data, the synchronization data being included in the record data; and a waveform equalizing device for performing a waveform equalization process on the read signal in which the waveform distortion is corrected, wherein said correcting device corrects the waveform distortion at least one of (i) before a space which makes a pair with a mark which constitutes the synchronization data of the read signal, (ii) after the space, and (iii) at a position which satisfies periodicity of the synchronization data with a base point at the space, and wherein, if the recording medium is a Blu-ray Disc, said correcting device corrects the waveform distortion at least one of (a) before a space with a run length of 9T which makes a pair with a mark with a run length of 9T which constitutes the synchronization data of the read signal, (b) after the 9T space, and (c) at a position after a lapse of a time corresponding to a run length of about 1932T from the 9T space.