Method and apparatus for recording address information on disc medium

A method for recording address information to a disc medium, the method comprising:

• a generating step of generating address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• a modulation step of making MSK modulation of a carrier signal correspondingly to the address information generated by the address information generating means to generate an MSK modulation signal;
• and
• a forming step of forming, on the disc medium, a spiral groove wobbled adaptively to the MSK modulation signal generated by the modulating means.

A recording medium having a computer-readable program for recording address information to a disc medium, the program comprising steps of:

• a generating step of generating address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• a modulation step of making MSK modulation of a carrier signal correspondingly to the address information generated by the address information generating means to generate an MSK modulation signal;
• and
• a forming step of forming, on the disc medium, a spiral groove wobbled adaptively to the MSK modulation signal generated by the modulating means.

A program for causing a computer, which controls operations for recording address information to a disc medium, to execute:

• a generating step of generating address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• a modulation step of making MSK modulation of a carrier signal correspondingly to the address information generated by the address information generating means to generate an MSK modulation signal;
• and
• a forming step of forming, on the disc medium, a spiral groove wobbled adaptively to the MSK modulation signal generated by the modulating means.

An apparatus for reproducing an address on a disc medium on the basis of wobbles of a groove formed on the disc medium, the apparatus comprising:

• radiating means for radiating laser light to the disc medium;
• return light detecting means for detecting return light from the disc medium to generate a return light signal corresponding to the return light thus detected;
• wobbling signal generating means for generating a wobbling signal corresponding to the wobbles of the groove on the basis of the return light signal generated by the return light detecting means;
• extracting means for extracting an MSK modulation signal by removing a noise component from the wobbling signal generated by the wobbling signal generating means;
• demodulating means for demodulating the MSK modulation signal to recover address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• sync unit pattern detecting means for detecting at least one of the plurality of sync unit patterns included in the sync signal in the address information recovered by the demodulating means;
• acquiring means for acquiring the address data and error correction code for the address data from the address information on the basis of the position of the sync unit pattern detected by the sync unit pattern detecting means;
• and
• reproducing means for reproducing the address on the basis of the address data and the error correction code for the address data, acquired by the acquiring means.

A method for reproducing an address on a disc medium on the basis of wobbles of a groove formed on the disc medium, the method comprising:

• a radiating step of radiating laser light to the disc medium;
• a return light detecting step of detecting return light from the disc medium to generate a return light signal corresponding to the return light thus detected;
• a wobbling signal generating step of generating a wobbling signal corresponding to the wobbles of the groove on the basis of the return light signal generated in the return light detecting step;
• an extraciting step of extracting an MSK modulation signal by removing a noise component from the wobbling signal generated in the wobbling signal generating step;
• a demodulating step of demodulating the MSK modulation signal to recover address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• a sync unit pattern detecting step of detecting at least one of the plurality of sync unit patterns included in the sync signal in the address information recovered in the demodulating step;
• an aquiring step of acquiring the address data and error correction code for the address data from the address information on the basis of the position of the sync unit pattern detected in the sync unit pattern detecting step;
• and
• a reproducing step of reproducing the address on the basis of the address data and the error correction code for the address data, acquired in the acquiring step.

A recording medium having recorded therein a computer-readable program comprising:

• a radiating step of radiating laser light to the disc medium;
• a return light detecting step of detecting return light from the disc medium to generate a return light signal corresponding to the return light thus detected;
• a wobbling signal generating step of generating a wobbling signal corresponding to the wobbles of the groove on the basis of the return light signal generated in the return light detecting step;
• an extraciting step of extracting an MSK modulation signal by removing a noise component from the wobbling signal generated in the wobbling signal generating step;
• a demodulating step of demodulating the MSK modulation signal to recover address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• a sync unit pattern detecting step of detecting at least one of the plurality of sync unit patterns included in the sync signal in the address information recovered in the demodulating step;
• an aquiring step of acquiring the address data and error correction code for the address data from the address information on the basis of the position of the sync unit pattern detected in the sync unit pattern detecting step;
• and
• a reproducing step of reproducing the address on the basis of the address data and the error correction code for the address data, acquired in the acquiring step.

A program for causing a computer, which controls operations for reproducing an address on a disc medium on the basis of wobbles of a groove formed on the disc medium, to execute steps of:

• a radiating step of radiating laser light to the disc medium;
• a return light detecting step of detecting return light from the disc medium to generate a return light signal corresponding to the return light thus detected;
• a wobbling signal generating step of generating a wobbling signal corresponding to the wobbles of the groove on the basis of the return light signal generated in the return light detecting step;
• an extraciting step of extracting an MSK modulation signal by removing a noise component from the wobbling signal generated in the wobbling signal generating step;
• a demodulating step of demodulating the MSK modulation signal to recover address information composed of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data;
• a sync unit pattern detecting step of detecting at least one of the plurality of sync unit patterns included in the sync signal in the address information recovered in the demodulating step;
• an aquiring step of acquiring the address data and error correction code for the address data from the address information on the basis of the position of the sync unit pattern detected in the sync unit pattern detecting step;
• and
• a reproducing step of reproducing the address on the basis of the address data and the error correction code for the address data, acquired in the acquiring step.