APPARATUS AND METHOD FOR MAKING A NEW PHYSICAL MASTER

摘要

Method and apparatus for forming a new physical master (212) from which a population of replicated media (160) can be subsequently formed. A transduced pattern sequence (232) is sampled (304) by a sampling circuit (226) at a selected sampling frequency to provide a sequence of digitized samples (234). The sequence of digitized samples is selectively adjusted (306) by an adjustment circuit (240) to provide a sequence of adjusted digitized samples with signal transitions corresponding to preselected symbol lengths (250). The sequence of adjusted digitized samples is thereafter written (310) to a medium (178) to form a new physical master from which a population of replicated media can be formed. Preferably, a second sampling circuit (228) concurrently samples a second transduced pattern sequence (236) to provide a second sequence of digitized samples (238). The adjustment circuit concurrently adjusts and outputs the second sequence during the writing of the new physical master.