OPTICAL RECORDING MEDIUM, METHOD FOR MANUFACTURING THE OPTICAL RECORDING MEDIUM, REPRODUCTION SIGNAL PROCESSING METHOD AND EVALUATION METHOD

摘要

An optical head (12) reproduces information recorded on an optical disc (11), a BCA detector (21) and a medium discriminating circuit (22) acquire waveform deformation information for specifying waveform deformation of a reproduction signal reproduced by the optical head (12), and a variable waveform equalizer (16) changes parameters to be used for deformation reducing processing for reducing waveform deformation of the reproduction signal based on the waveform deformation information.