Disc recording medium and data recording method

A disc recording medium having a data recording region and being capable of having data recorded in the data recording region reproduced by turning the disc recording medium, the disc recording medium comprising:

• a plurality of same data successively recorded in the data recording region, a number of the same data being at least two;
• and
• adjusting data having a predetermined data length in the data recording region and being recorded among the plural same data, the predetermined data length being so set that at least two of the same data are located at a position non-parallel from each other in a radial direction of the disc recording medium.

A disc recording medium having a region for recording portions of reproducible data, the disc recording medium comprising a plurality of spaced apart data tracks for recording the portions of the reproducible data, each portion of the reproducible data being recorded at least twice on the plurality of spaced apart data tracks, wherein a first recording of each portion of the reproducible data is recorded at a position on a first data track, and wherein a second recording of each corresponding portion of the reproducible data is recorded at a position on a data track other than the first data track such that a line lying along the radial direction of the disc recording medium and passing through the position of the first recording of each portion of the reproducible data on the first data track is oblique to the position of the corresponding second recording of data recorded on the other data track.

A method of recording portions of reproducible data on a disc recording medium having a region for recording reproducible data, the recording region including a plurality of spaced apart data tracks for recording the reproducible data, the method comprising the steps of:

• recording the reproducible data onto a first data track having a plurality of recording portions;
• and
• recording the same reproducible data as recorded on the first data track onto a second data track having recording portions corresponding to the recording portions of the first data track and being located relative to the first data track such that a line lying along the radial direction of the disc recording medium and passing through one of the plurality recording portions of the first data track is oblique to the corresponding recording portions of the second data track which contains the same data as recorded on the first data track.