Method and apparatus for detecting blank region of optical storage medium

摘要

The present invention provides a detecting method for effectively detecting blank regions on an optical storage medium. The detecting method is to detect the radio frequency (RF) waveform from the optical storage medium. The RF waveform comprises a plurality of sinewaves with different frequencies. The amplitudes of the sinewaves are selectively boosted with different boost gains depending on the frequencies of the sinewaves to obtain a corresponding gain boost signal. The gain boost signal is judged with a predetermined blank judging interval. When the present amplitudes of the gain boost signal fall within the blank judgment interval, the RF waveform is deemed detected from the blank regions of the optical storage medium.