Apparatus protecting header region of optical disc and method therefor

An apparatus protecting a header region of an optical disc, in an apparatus writing data on the optical disc by controlling an intensity of a laser beam which is radiated to the optical disc divided into the header region and a data region, comprising:

• a header region detector detecting a header region signal indicative of the header region from an RF signal detected from the optical disc;
• a write clock generator generating a write clock;
• a write control signal generator counting the write clock and generating a write control signal whose state is inverted after a lapse of a predetermined clock;
• a write controller controlling the intensity of the write laser beam corresponding to the write control signal;
• and
• a write stop signal generator generating a write stop signal and controlling the write control signal when the write control signal is generated in the header region according to the header region signal.

An apparatus for protecting a header region of an optical disc, in an apparatus for writing data on the optical disc by controlling an intensity of a laser beam which is radiated to the optical disc divided into the header region and a data region, comprising:

• header region detecting means for detecting a header region signal indicative of the header region from an RF signal detected from the optical disc;
• first clock generating means for generating a write clock;
• second clock generating means for generating a clock different from the write clock;
• first counting means for counting the write clock and generating a write control signal;
• second counting means for counting the clock output by the second clock generating means and outputting a header position estimation signal when the count value becomes a predetermined value;
• AND gating means for generating an active output when the write control signal is generated in the header region detected by the header region detecting means;
• write stop signal generating means for resetting the output of the first counting means using the output of the second counting means and the output of the AND gating means;
• and
• write controlling means for controlling the intensity of the write laser beam responsive to the write control signal.

An apparatus writing data on the optical disc by controlling an intensity of a laser beam radiated to the optical disc divided into a header region and a data region and protecting the header region from the writing, the apparatus comprising:

• header region detecting means for detecting a header region signal indicative of the header region from an RF signal detected from the optical disc;
• write clock generating means for generating a write clock;
• write control signal generating means for counting the write clock and generating a write control signal whose state is inverted after a lapse of a predetermined clock;
• write control signal generating means for controlling the intensity of the write laser beam corresponding to the write control signal;
• and
• write stop signal generating means for generating a write stop signal and controlling the output of the write control signal when the write control signal is generated in the header region according to the header region signal.

An apparatus writing data on the optical disc by controlling an intensity of a laser beam radiated to the optical disc divided into a header region and a data region and protecting the header region from the writing, the apparatus comprising:

• a header region detector detecting a header region indicative of the header region from an RF signal detected from the optical disc;
• a first clock generator generating a write clock;
• a second clock generator generating a clock different from the write clock;
• a first counter counting the write clock and generating a write control signal;
• a second counter counting the clock output by the second clock generator and outputting a header position estimation signal when the count value becomes a predetermined value;
• an AND gate circuit generating an active output when the write control signal is generated in the header region detected by the header region detector;
• a write stop signal generator resetting the output of the first counter using the output of the second counter and the output of the AND gate circuit;
• and
• a write controller controlling the intensity of the write laser beam responsive to the write control signal.