| 摘要 |
A digital signal processor (DSP) of a disc player includes a record signal obtaining portion for obtaining an all sum signal that is a total sum of electric signals corresponding to all reflection light obtained by an optical pickup by projecting a laser beam from a laser diode (LD) for Blue-ray disc (BD) to a reproduction data area an optical disc, which stores information to be reproduced, a test signal obtaining portion for obtaining another all sum signal by projecting the laser beam from the LD for BD to a calibration area of the optical disc where a distance from the center position is within the range of 21.3 to 22.0 millimeters, and a discriminating portion for discriminating whether or not the optical disc is a BD based on the all sum signal obtained by the record signal obtaining portion and the another all sum signal obtained by the test signal obtaining portion.
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