Patent ID: 7345978
Filing Date: 2008-03-18
Classification: G11B

Abstract:
1. A method for determining the address of a frame inside a data sector of an optical recording medium, the data sector comprising a plurality of frames, each frame being preceded by a synchronisation code which is detected during playback of the optical recording medium, the method comprising the steps of: keeping a history of previously detected synchronisation codes; appending the detected synchronisation code to the history; each time a synchronisation code is appended to the history, comparing a pattern of previously detected synchronisation codes with a plurality of valid patterns of synchronisation codes; delivering a valid frame address if the pattern of previously detected synchronisation codes corresponds to one of the plurality of valid patterns of synchronisation codes the valid frame address corresponding to the valid pattern of synchronisation codes; and delivering an error frame address if the pattern of previously detected synchronisation codes does not correspond to any of the plurality of valid patterns of synchronisation codes, wherein the error frame address is one of a plurality of predefined frame addresses different from any valid frame address in the data sector depending on a last delivered valid frame address.