Patent ID: 8498186

Claim:
A method of correcting read operations from and/or write operations to an optical storage medium, the method comprising: reading a region of an optical storage medium to produce a readback signal, wherein the readback signal comprises a plurality of edges including one or more non-guide edges; measuring timing offsets for at least a first one of the non-guide edges and at least a second one of the plurality of edges, each of edges that are not non-guide edges corresponding to a transition between a first mark and a first space both having a same run length, each of the non-guide edges corresponding to a transition between a second mark and a second space, the run length being greater than a run length of at least one of the second mark and the second space; and storing an offset correction for at least one of the plurality of edges based on a measured offset of at least the first one of the non-guide edge or at least the second one of the plurality of edges relative to a predetermined offset.