Method and apparatus for detecting position of blank area of optical disc

A method for detecting position of a blank area of an optical disc, the method comprising:

• generating a count value according to a wobble signal;
• receiving a blank signal;
• determining whether the count value is within a predetermined range when an edge of the blank signal occurs;
• and
• if the count value is within the predetermined range when the edge of the blank signal occurs, generating a control signal corresponding to a blank area of the optical discs;
• wherein when the edge of the received blank signal occurs, determining whether the count value is within the predetermined range is performed, and a position value corresponding to the blank area of the optical disc is generated if the count value is within the predetermined range.

An optical disc drive for detecting position of blank areas of an optical disc according to a wobble signal and a blank signal comprising:

• a counting device for generating a count value according to the wobble signal;
• and a decision circuit coupled to the counting device determining whether the count value is within a predetermined range when an edge of the blank signal occurs;
• wherein if the count value is within the predetermined range when the edge of the blank signal occurs, the decision circuit generates a control signal corresponding to a blank area of the optical disc;
• the decision circuit receives the blank signal;
• and when the edge of the received blank signal occurs, the decision circuit determines whether the count value is within the predetermined range, and generates a position value corresponding to the blank area of the optical disc if the count value is within the predetermined range.

An apparatus for detecting position of a blank area of an optical disc

• according to a wobble signal and a blank signal in an optical disc drive, the apparatus comprising:
• a counting device for generating a count value according to the wobble signal;
• and
• a decision circuit coupled to the counting device determining whether the count value is within a predetermined range when an edge of the blank signal occurs, the decision circuit further comprising a detecting circuit for detecting the edge of the blank signal to generate a detection signal;
• wherein if the count value is within the predetermined range when the edge of the blank signal occurs, the decision circuit generates a control signal corresponding to a blank area of the optical disc;
• and if the count value is within the predetermined range when the detection signal is generated, the decision circuit utilizes the count value as a position value corresponding to the blank area of the optical disc.

An apparatus for detecting position of a blank area of an optical disc according to a wobble signal and a blank signal in an optical disc drive, the apparatus comprising:

• a counting device for generating a count value according to the wobble signal;
• and
• a decision circuit coupled to the counting device determining whether the count value is within a predetermined range when an edge of the blank signal occurs, the decision circuit further comprising a detecting circuit for detecting the edge of the blank signal to generate a detection signal;
• wherein if the count value is within the predetermined range when the edge of the blank signal occurs, the decision circuit generates a control signal corresponding to a blank area of the optical disc;
• and if the count value is within the predetermined range when the detection signal is generated, the decision circuit converts the count value into a corresponding physical address to be a position value corresponding to the blank area of the optical disc.

A method for detecting position of a blank area of an optical disc, the method comprising:

• generating a count value according to a wobble signal;
• receiving a blank signal;
• determining whether the count value is within a predetermined range when an edge of the blank signal occurs;
• if the count value is within the predetermined range when the edge of the blank signal occurs, generating a control signal corresponding to a blank area of the optical disc;
• generating a physical address value according to the wobble signal;
• and
• if the count value does not match the corresponding physical address value, updating the count value with the physical address value.

An apparatus for detecting position of a blank area of an optical disc according to a wobble signal and a blank signal in an optical disc drive, the apparatus comprising:

• a counting device for generating a count value according to the wobble signal;
• a decision circuit coupled to the counting device determining whether the count value is within a predetermined range when an edge of the blank signal occurs;
• an address decoder, coupled to the counting device, for generating a physical address value according to the wobble signal;
• and
• an updating circuit;
• wherein if the count value is within the predetermined range when the edge of the blank signal occurs, the decision circuit generates a control signal corresponding to a blank area of the optical disc;
• and if the updating circuit determines that the count value does not match the corresponding physical address value, the updating circuit updates the count value of the counting device according to the physical address value.