Magnetic recording information processing device and magnetic recording information processing method

A magnetic recording information processing device which reads out information recorded in a magnetic recording medium, the magnetic recording information processing device comprising:

• a magnetic head which reads the magnetic recording medium and outputs a magnetic reproduction waveform of the information recorded in the magnetic recording medium;
• an analog-digital conversion part which converts the magnetic reproduction waveform into a digital signal;
• a memory which accumulates the digital signal sampled at a first sampling period as data;
• a thinning-out processing part which samples the digital signal at a second sampling period longer than the first sampling period;
• a demodulation processing part which performs demodulation processing of the information recorded in the magnetic recording medium;
• and
• a control part which causes the demodulation processing part to execute demodulation processing in real time based on the digital signal sampled at the second sampling period by the thinning-out processing part and, when the demodulation processing in real time has failed, the control part causing the demodulation processing part to execute demodulation processing based on the data sampled at the first sampling period and accumulated in the memory.