Patent ID: 7272098

Claim:
A recording method, comprising: generating recording data satisfying a predetermined run length limit condition by converting m-bit data into n-bit data symbols through a digital modulation, where m<n, and selecting bit patterns for connecting the n-bit data symbols from a plurality of predetermined bit patterns, adding, when said n-bit symbol is a special data symbol, connection bits from among a plurality of connection bits after said n-bit data symbol to create a summed value of digital sum variation DSV per unit time that does not exceed a predetermined range; adding, when said n-bit data symbol is a normal data symbol, said connection bits from among said plurality of connection bits are added after said n-bit data symbol to create said summed value of digital sum variation DSV per unit time that exceeds said predetermined range, wherein the predetermined range defines a threshold which, when exceeded by the summed value, disturbs normal reproduction of data; and recording said generated recording data on a recording medium.