Method and apparatus of discriminating different types of...

Details Method and apparatus of discriminating different types of... Method and apparatus of discriminating different types of...

2009-06-03

2011-10-11

Hindi, Nabil Z (Department: 2627)

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Reexamination Certificate

active

08036080

ABSTRACT:
A method for discriminating different types of optical discs includes the steps of focusing a beam spot generated by a laser source on an optical disc, and rotating the optical disc; generating a radio frequency signal and a corresponding first signal of the radio frequency signal; comparing a peak-to-peak value of the corresponding first signal with a predetermined value; determining the optical disc as a high density optical disc when the peak-to-peak value of the first signal is smaller than the predetermined value; and, determining the optical disc as a low density optical disc when the peak-to-peak value of the first signal is greater than the predetermined value.

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