Patent ID: 8565054

Claim:
An optical recording medium comprising: a land track or a groove track having information recorded thereon, wherein: a waveform equalization processing of a reproduction signal reproduced from the optical recording medium is adjusted by changing a gain used in the waveform equalization processing based on waveform distortion information for specifying a waveform distortion of the reproduction signal; and the gain is (i) increased to emphasize high-frequency components of the reproduction signal more in a waveform equalization processing of a reproduction signal reproduced from a first optical recording medium, in which a reflectance of a recorded area of the first optical recording medium is lower than a reflectance of an unrecorded area of the first optical recording medium, than in a waveform equalization processing of a reproduction signal reproduced from a second optical recording medium, in which a reflectance of a recorded area of the second optical recording medium is higher than a reflectance of an unrecorded area of the second optical recording medium, and (ii) decreased to reduce the waveform distortion of the reproduction signal more in the waveform equalization processing of the reproduction signal reproduced from the second optical recording medium than in the waveform equalization processing of the reproduction signal reproduced from the first optical recording medium.