Apparatus and method for analyzing the read-out signal of an optical storage media

An apparatus for analyzing the read-out signal of an optical storage media, comprising:

• a low-pass filter unit, which is used to produce the DC component signal of the read-out signal;
• a non-inverting amplifier unit, which is used to produce the maximum value of the read-out signal;
• an inverting amplifier unit, which is used to produce the minimum value of the read-out signal;
• a first switch unit, which is used to choose whether the maximum value or the minimum value of the high frequency (HF) signal will be measured;
• a comparator unit, which is used to produce a first output signal according to the DC component signal and an upper waveform, or a lower waveform;
• a peak detector unit, which is used to produce a second output signal according to the upper waveform, or the lower waveform, and a discharge signal;
• a 3T-signal detector unit and an nT-signal detector unit, which is used to detect whether the positive edge, or the negative edge, or the EFM+ signal sliced from the read-out signal occurs in the time interval of detection;
• a second switch unit, which is used to choose between the 3T-signal detector unit and the nT-signal detector;
• and
• two memory units, which are used to record the DC component signal and an AC component signal respectively for verifying the read-out signal.