Patent ID: 6034934
Filing Date: 2000-03-07
Classification: G11B

Abstract:
A disc reproduction apparatus capable of reading a main data and a bar code data which is stored separately from said main data on a disc-shaped recording medium, said apparatus comprising:pickup means for emitting a laser beam onto said disc-shaped recording medium and obtaining from a reflected light a signal corresponding to an information recorded on said disc-shaped recording medium;rotation drive means for rotating said disc-shaped recording medium;measuring means for measuring an edge interval of a bar code signal extracted by said pickup means through reading a bar code data recording area on the disc-shaped recording medium; anddecoding means for decoding a bar code data recorded on the disc-shaped recording medium through identification of each edge interval value with a corresponding bar interval according to a distribution of edge interval values measured by said measuring means while said rotation drive means rotates the disc-shaped recording medium approximately at a constant rotation velocity and the pickup means read the bar code data recording area.