Abstract: A digital data reproducing method is for reproducing data from a disc-shaped storage medium. Recorded on the disc-shaped recording medium is a designated reproducing unit size that is one of a plurality of possible reproducing unit sizes. The disc-shaped storage medium also has recorded thereon address information that includes repetitions of a plurality of sectors. The disc-shaped storage medium is rotated at a constant linear velocity and the designated reproducing unit size is reproduced from the disc-shaped storage medium. Then, data is reproduced from the disc-shaped storage medium in accordance with the address information and in increments of substantially the designated reproducing unit size such that each increment of data reproduced from the disc-shaped storage medium includes a plurality of sectors, including linking and data recording sectors. The designated data reproducing unit size is not greater than the number of repeated sectors of address information.

Abstract: A digital data recording method includes initially designating a recording unit size that is one of a plurality of possible recording unit sizes. Then, the digital data to be recorded is received. The digital data is converted to a sector structure of a predetermined data quantity. An error correction and encoding process, including interleaving, is performed on the converted digital data. Finally, the processed data is recorded onto a disc-shaped storage medium rotated at a constant linear velocity. The disc-shaped storage medium has recorded on it address information that includes repetitions of a plurality of sectors. The recording of the processed data to the disc-shaped storage medium is performed in accordance with the address information and in increments of substantially the designated recording unit size such that each recording unit includes a plurality of sectors, including linking and data recording sectors.