Patent ID: 7099255
Filing Date: 2006-08-29
Classification: G11B

Abstract:
1. An error counting apparatus for counting an error number of a pre-pit signal in a recording area containing an unreadable emboss portion formed on an optical disc, said apparatus comprising: a reproducing section adapted to reproduce the optical disc; a counter for counting the error number of the pre-pit signal based on an output of the reproducing section; an emboss portion detector for detecting that the reproducing section comes up to reproduction of the unreadable emboss portion; a count start controller for starting a counting operation of the counter in response to an output of the emboss portion detector; a predetermined interval detector for detecting that the reproducing section has reproduced the optical disc in a predetermined interval after the counting operation is started; and a count stop controller for stopping the counting operation of the counter in response to an output of the predetermined interval detector; and wherein the emboss portion detector detects the unreadable emboss portion based on a decoded signal of a readable emboss portion.