Optical recording medium on which a wobble signal having header information is recorded, an apparatus and method of recording wobble signal, and an apparatus and method of reproducing the wobble signal

A method of recording a wobble signal on an optical recording medium, the method comprising the operations of:

• generating first and second carrier signals having a same frequency and different edge waveforms;
• generating a single-frequency wobble signal having header information which is edge-modulated using the generated first and second carrier signals;
• and
• recording the generated single-frequency wobble signal on the optical recording medium.

A method of recording a wobble signal on an optical recording medium, the method comprising the operations of:

• generating first and second carrier signals having a same frequency and different edge waveforms;
• generating a single-frequency wobble signal having first header information which is edge-modulated using the generated first and second carrier signals and second header information which is phase-modulated using the first or second carrier signal;
• and
• recording the generated single-frequency wobble signal.

A method of reproducing header information from a wobble signal recorded on an optical recording medium, the method comprising the operations of:

• reading a single-frequency wobble signal having header information which is edge-modulated by using first and second carrier signals having a same frequency and different edge waveforms;
• generating duty signals from the read wobble signal;
• and
• comparing the duty signals to extract header information.

A method of reproducing header information from a wobble signal recorded on an optical recording medium, the method comprising the operations of:

• reading a single-frequency wobble signal having header information which is edge-modulated using first and second signals having a same frequency and different edge waveforms;
• detecting levels of the read wobble signal at a predetermined phase;
• and
• comparing the detected levels with a predetermined reference value to extract header information.

A method of reproducing header information from a wobble signal recorded on an optical recording medium, the method comprising the operations of:

• reading a single-frequency wobble signal having header information which is edge-modulated using first and second carrier signals having a same frequency and different edge waveforms;
• generating a differential signal from the read wobble signal;
• and
• extracting the header information based on the generated differential signal.

An apparatus reproducing header information from a wobble signal recorded on an optical recording medium, the apparatus comprising:

• a wobble signal reading unit reading from the optical recording medium a single-frequency wobble signal having header information which is edge-modulated using first and second carrier signals having a same frequency and different edge waveforms;
• a duty signal generator generating duty signals from the read wobble signal;
• and
• a header information extractor comparing the generated duty signals to extract the header information.

An apparatus reproducing header information from a wobble signal recorded on an optical recording medium, the apparatus comprising:

• a wobble signal reading unit reading a single-frequency wobble signal having header information which is edge-modulated using first and second carrier signals having a same frequency and different edge waveforms;
• a level detector detecting levels of the read wobble signal at a predetermined phase;
• and
• a header information extractor extracting the header information by comparing the detected levels with a predetermined reference value.

An apparatus reproducing header information from a wobble signal recorded on an optical recording medium, the apparatus comprising:

• a wobble signal reading unit reading a single-frequency wobble signal having header information which is edge-modulated using first and second carrier signals having a same frequency and different edge waveforms;
• a differentiator generating a differential signal for the read wobble signal;
• and
• a header information extractor extracting the header information based on the generated differential signal.

An apparatus recording a wobble signal having header information on an optical recording medium and reproducing header information from the wobble signal recorded on the optical recording medium, the apparatus comprising:

• a wobble signal generator generating a single-frequency wobble signal containing header information which is edge-modulated based on first and second carrier signals having a same frequency and different edge waveforms;
• a recording unit recording the wobble signal generated by the wobble signal generator on the optical recording medium;
• a wobble signal reading unit reading said recorded single-frequency wobble signal having header information which is edge-modulated using first and second carrier signals having a same frequency and different edge waveforms;
• a duty signal generator generating duty signals from the read wobble signal;
• a header information extractor comparing the generated duty signals and extracting header information.

A method of recording a wobble signal having header information on an optical recording medium and reproducing header information from the wobble signal recorded on an optical recording medium, the method comprising the operations of:

• generating first and second carrier signals having a same frequency and different edge waveforms;
• generating a single-frequency wobble signal having header information which is edge-modulated using the generated first and second carrier signals;
• recording the generated single-frequency wobble signal on the optical recording medium;
• reading said recorded single-frequency wobble signal having header information which is edge-modulated using first and second carrier signals having a same frequency and different edge waveforms;
• generating duty signals from the read wobble signal;
• and
• comparing said duty signals to extract the header information.