METHOD FOR PLAYBACK OR RECORDING OF AN OPTICAL RECORDING MEDIUM

摘要

The present invention relates to a method for analyzing abnormal regions on an optical recording medium. The method includes the steps of: - detecting (21) the abnormal region; - determining (23, 31) the type of the abnormal region; and - measuring (24, 32) the length of the abnormal region. Before playback or recording of an optical recording medium inserted in an apparatus for reading from and/or writing to optical recording media the apparatus determines (21, 23, 24, 31, 32) the positions, lengths and types of abnormal regions on the optical recording medium. The obtained information can then be used, for example, to avoid that during playback or recording a pickup for reading and/or recording unexpectedly encounters an abnormal region. This makes the operation of the apparatus more reliable.