Optical disk, optical disk recording method and optical disk apparatus

An optical disk apparatus for recording data on an optical disk having header fields which are provided on tracks of one of a concentric form and spiral form and in each of which an address indicating a position on the track is previously recorded, and recording fields which respectively follow the header fields and in which preset data is recorded and reproducing data recorded on the optical disk, comprising:

• first reproduction means for reproducing data in the header field;
• second reproduction means for reproducing data in the recording field;
• determining means for determining whether a signal now reproduced is a signal from the header field or a signal from the recording field;
• and
• processing means for reproducing data by use of said first reproduction means when said determining means determines that the signal now reproduced is a signal from the header field and reproducing data by use of said second reproduction means when said determining means determines that the signal now reproduced is a signal from the recording field.

An optical disk apparatus for recording data on an optical disk having header fields which are provided on tracks of one of a concentric form and spiral form and in each of which an address indicating a position on the track and at least one pattern (AM) for detecting the address are previously recorded, and recording fields which respectively follow the header fields and in which preset data is recorded and reproducing data recorded on the optical disk, comprising:

• first reproduction means for reproducing data in the header field;
• second reproduction means for reproducing data in the recording field;
• recording means for recording data in the recording field;
• first detection means for detecting the pattern used for detecting the address recorded in the header field based on a reproduction signal from said first reproducing means;
• second detection means for detecting the address recorded in the header field based on a detection process of said first detecting means;
• and
• processing means for reproducing data in a corresponding portion of the recording field by use of said second reproduction means or recording data in a corresponding portion of the recording field by use of said recording means when the address detected by said second detection means comes to an access position.

An optical disk apparatus for recording data on an optical disk having header fields which are provided on tracks of one of a concentric form and spiral form and in each of which an address indicating a position on the track and at least one pattern (AM) for detecting the address are previously recorded, and recording fields which respectively follow the header fields and in which preset data is recorded and reproducing data recorded on the optical disk, comprising:

• a first reproduction section for reproducing data in the header field;
• a second reproduction section for reproducing data in the recording field;
• a recording section for recording data in the recording field;
• a first detection section for detecting the pattern used for detecting the address recorded in the header field based on a reproduction signal from said first reproduction section;
• a second detection section for detecting the address recorded in the header field based on the result of detection of said first detection section;
• and
• a processing section for reproducing data in a corresponding portion of the recording field by use of said second reproduction section or recording data in a corresponding portion of the recording field by use of said recording section when the address detected by said second detection section comes to an access position.