Patent ID: 7154417
Filing Date: 2006-12-26
Classification: G11B

Abstract:
1. An optical disk apparatus which records data on an optical disk by inserting synchronization information in every predetermined information unit, comprising: temporarily setting means for temporarily setting a polarity of a next synchronization information item to either a mark or a space in accordance with a predetermined rule; computation means for computing a DSV to be obtained by inserting the next synchronization item with the polarity which has been temporarily set; determination means for determining whether or not the DSV which is computed is equal to or smaller than a predetermined limit value; and synchronization information controlling means which accepts the polarity which is temporarily set and inserts the next synchronization information item with the polarity when, as a result of the determination by the determination means, it is determined that the DSV is equal to or smaller than the predetermined limit value and which does not accept the polarity which has been temporarily set and inserts the next synchronization information with a polarity with which the DSV is minimized when, as a result of the determination by the determination means, it is determined that the DSV exceeds the predetermined limit value.