Method and apparatus for detecting blank region of optical storage medium

A detection method for detecting blank regions of an optical storage medium containing data recording regions and blank regions, the data recording regions being regions in the optical storage medium which have recorded a plurality of data thereon, and the blank regions being regions in the optical storage medium, which have not yet recorded data thereon, the detection method comprising the following steps:

• (A) detecting a radio frequency (RF) waveform from the optical storage medium, the RF waveform potentially comprising background noises and a plurality of different frequency sinewaves, wherein the higher the frequency sinewave is, the smaller the amplitude is;
• (B) selectively boosting the amplitudes of the sinewaves with different boost gains according to the respective frequencies of the input sinewaves in the RF waveform, and obtaining a corresponding gain boost signal;
• and
• (C) judging the gain boost signal with a predetermined blank judgment interval, wherein 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, otherwise the RF waveform is deemed detected from the data recording regions.

A detection apparatus for detecting blank regions of an optical storage medium containing data recording regions and blank regions, the data recording regions being regions in the optical storage medium, which have recorded a plurality of data thereon, and the blank regions being regions in the optical storage medium, which have not yet recorded data thereon, the detection apparatus comprising:

• a waveform detection module for detecting a radio frequency (RF) waveform from the optical storage medium, the RF waveform potentially comprising background noises and a plurality of different frequency sinewaves, wherein the higher the frequency sinewave is, the smaller the amplitude is;
• a selective gain boost module for selectively boosting the amplitudes of the sinewaves with different boost gains according to the respective frequencies of the input sinewaves in the RF waveforms, and obtaining a corresponding gain boost signal;
• and
• a blank region judgment module for judging an envelope of the gain boost signal with a predetermined threshold, wherein when the envelope of the gain boost signal is not beyond the predetermined threshold, the RF waveform detected by the waveform detection module is deemed from the blank regions, otherwise the RF waveform detected by the waveform detection module is deemed from the data recording regions.

A detection method for detecting blank regions of an optical storage medium containing data recording regions and blank regions, the data recording regions being regions in the optical storage medium which have recorded a plurality of data thereon, and the blank regions being regions in the optical storage medium, which have not yet recorded data thereon, the detection method comprising the following steps:

• (A) detecting a radio frequency (RF) waveform from the optical storage medium, the RF waveform potentially comprising background noises and a plurality of different frequency sinewaves, wherein the higher the frequency sinewave is, the smaller the amplitude is;
• (B) selectively boosting the amplitudes of the sinewaves with different boost gains according to the respective frequencies of the input sinewaves in the RF waveform, and obtaining a corresponding gain boost signal;
• and
• (C) judging an envelope of the gain boost signal with a predetermined threshold, wherein when the envelope of the gain boost signal is not beyond the predetermined threshold, the RF waveform is deemed from the blank regions, otherwise the RF waveform is deemed from the data recording regions.