Optical disc with wobbled tracks and apparatus using this optical disc

A method for recording content information on an optical disc on which wobbled grooves are concentrically or spirally formed, and physical address information is recorded by modulating groove wobbles, wherein address information is formed by M wobbles per bit as a basic unit, and the address information is NRZ recorded, where integer M is the number of wobble waves, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit, and the sync signal with that configuration is recorded on the head side of the address information, where integer N is the number of wobble waves and M=2N, and the sync signal contains a symbol sequence as a run of odd numbered 0's or 1's as a symbol sequence that is not present in the address information, said method comprising:

• providing the content information;
• and
• recording the content information on the disc according to said address information.

A method for reproducing content information from an optical disc on which wobbled grooves are concentrically or spirally formed, and physical address information is recorded by modulating groove wobbles, wherein address information is formed by M wobbles per bit as a basic unit, and the address information is NRZ recorded, where integer M is the number of wobble waves, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit, and the sync signal with that configuration is recorded on the head side of the address information, where integer N is the number of wobble waves and M=2N, and the sync signal contains a symbol sequence as a run of odd numbered 0's or 1's as a symbol sequence that is not present in the address information, said method comprising:

• obtaining the address information from the disc;
• and
• reproducing the content information from the disc according to said address information.