Patent ID: 8531936

Claim:
A reproducing method for reproducing modulation data from a storage medium, wherein Non-Return to Zero Inverting technique is utilized for the modulation data, the modulation data has a minimum length and a maximum length which relate to the Non-Return to Zero Inverting technique, a channel bit length T represents the modulation data, the minimum length corresponds to 2T, the reproducing method comprising: irradiating the storage medium with light; reproducing a reproduction signal; and passing the reproduction signal through a pre-amplifier, a high pass filter, an equalizer, and a slicer to generate the modulation data, an amplitude I3 of the reproduction signal is generated by a mark regarding 3T and a space regarding 3T or is generated by a pit regarding 3T and a space regarding 3T, a maximum amplitude of the reproduction signal is generated by a mark regarding the maximum length and a space regarding the maximum length or is generated by a pit regarding the maximum length and a space regarding the maximum length, a ratio of the amplitude I3 to the maximum amplitude is more than 0.2, a peak value of the reproduction signal is generated by the space regarding the maximum length or is generated by the mark regarding the maximum length, and a ratio of the maximum amplitude to the peak value is more than 0.2.