INDIVIDUAL ADJUSTMENT OF PIT AND LAND TRANSITION LOCATIONS IN AN OPTICAL DISC MASTERING PROCESS

摘要

An apparatus and method for optimizing the writing of data to an optical disc. An optimization circuit (200) generates an optimized modulation signal which modulates a writing beam of a laser beam recorder (204), the optimized modulation signal comprising a series of data symbols (240) that correspond to resulting pits and lands on the optical disc (130, 140, 150, 160). The optimization circuit individually adjusts leading and trailing edges of the data symbols, as well as amplitudes of the data symbols. The selective placement of pit and land transitions can be used to embed a second set of data on the optical disc to provide watermarks or anti-piracy hidden codes. Electrical jitter errors, including data correlated jitter, can further be minimized through a master driver circuit (300) which can be used to reclock an initial modulation signal prior to generation of the optimized modulation signal by the optimization circuit.