Optical data recording method, and data recording medium

A recording and reproducing apparatus for recording and reproducing a data recording medium having a plurality of tracks for recording information represented as marks and spaces between the marks in a data recording area of the data recording medium, the marks being formed by an optical beam modulated by one or a plurality of drive pulses comprising a first pulse, a last pulse and one or more multiple pulses between the first and last pulses, where a number of the drive pulses is determined according to a length of a mark part in the input signal to be recorded on the track, said data recording medium comprising:

• a control information recording area storing:
• first pulse movements (TF) for modifying the first pulse of the drive pulses, said first pulse movements (TF) being separated at least into nine groups determined by a combination of three groups of different lengths of a mark and three groups of different lengths of a space immediately preceding the mark, the three groups of different mark lengths being a group with only the first pulse, a group with the first pulse and the last pulse, and a group with the first pulse, the multiple pulse and the last pulse, wherein said first pulse movements (TF) indicate either a pulse shift amount for shifting the first pulse without changing a pulse width, or a pulse width amount for changing the pulse width of the first pulse;
• and
• a code indicating a method for using said first pulse movements (TF) either as the pulse shift amount or as the pulse width amount;
• said apparatus comprising:
• device operable to reproduce the first pulse movements (TF) and the code from the data recording medium;
• device operable to store the reproduced first pulse movements (TF) and the code;
• device operable to generate a drive pulse based on a data recording signal, and correct the generated drive pulse based on the first pulse movements (TF) and the code;
• device operable to emit an optical beam based on the corrected drive pulses to form spaces and marks on the data recording medium.

A data recording medium having a plurality of tracks for recording information represented as marks and spaces between the marks in a data recording area of the data recording medium, the marks being formed by an optical beam modulated by one or a plurality of drive pulses comprising a first pulse, a last pulse and one or more multiple pulses between the first and last pulses, where a number of the drive pulses is determined according to a length of a mark part in the input signal to be recorded on the track;

• characterized by a control information recording area storing:
• first pulse movements (TF) for modifying said first pulse of said drive pulses, said first pulse movements (TF) being separated at least into nine groups determined by a combination of three groups of different length of a mark and three groups of different length of a space immediately preceding said mark, the three groups of different mark length being a group with only the first pulse, a group with the first pulse and the last pulse, and a group with the first pulse, the multiple pulse and the last pulse, wherein said first pulse movement (TF) indicates either a pulse shift amount for shifting said first pulse without changing the pulse width, or a pulse width amount for changing the pulse width of said first pulse;
• and
• a code indicating a method for using said first pulse movement (TF) either as a pulse shift amount or as a pulse width amount.