Patent ID: 7212479
Filing Date: 2007-05-01
Classification: G11B

Abstract:
1. An apparatus of detecting defects on an optical recording medium, comprising: a defect signal generating circuit for generating a corresponding defect signal according to at least one surface defect of an optical recording medium, said defect signal including at least one pulse, whose width corresponds to a physical width of said surface defect; a defect signal locating circuit; a first synchronous signal generator for generating a first synchronous signal, said first synchronous signal being inputted to said defect signal locating circuit; and a delay signal generating circuit for generating a delay signal according to each said pulse of said defect signal; wherein the pulse duration of said delay signal is larger than a signal spacing between adjacent two of said pulses, and said optical recording medium comprises a plurality of data recording sectors, every adjacent two of said data recording sectors are separated by a second synchronous signal, and said second synchronous signal is inputted into said defect signal locating circuit to incorporate with said first synchronous signal for determining an address of said surface defect in said data recording sectors and the physical width of said surface defect.