Information recording apparatus, information recording method and information recording program

摘要

As a recording medium (100), an optical disc capable of repeated recording, such as a DVD-RW, is applicable. An information recording and reproducing apparatus (200) starts recording by making a sync pattern (14) of recording data correspond to a recording reference position (10) determined by an LPP and the like formed on the optical disc at the time of recording new data on the optical disc. Afterward, the information recording and reproducing apparatus continues the recording by gradually shifting a position of the sync pattern of the recording data with respect to the recording reference position, and performs the recording with the shift quantity (X) fixed to a predetermined shift quantity (±) when a shift quantity (X) thereof reaches a quantity equal to or larger than the predetermined quantity (±). Thereby, at a rewriting portion on the optical disc, the shift between recorded data and a recording start position of recording data for rewriting can be small, and establishing synchronization at the time of reproducing or rewriting can be stably performed. In addition, since the shift quantity is varied at every time of recording the data, there is a small probability that the position of the sync pattern of the recording data is overlapped, and a number of rewriting can be improved.