OPTICAL DEVICE AND OPTICAL DISC RECORDING OR REPRODUCING METHOD

摘要

According to an optical disc, a track, where data is recorded in predetermined block units, is formed by wobbling at a spatial period in accordance with a radial position, and the track is divided into zones in a radial direction. Data is recorded in each of the zones at a predetermined line density based on a ratio n/m of the number of bits of a bit pattern of recording data to one wavelength of wobbling. The optical disc includes a first area having one of the zones, a second area having one of the zones different from the one of the zones in the first area, and a line density of data different from a line density of data in the first area, and a BCA where a zone format identifier specifying a zone table defining a boundary position of each of the zones and the ratio n/m is recorded.

主权项

1. An optical disc that a track, where data is recorded in predetermined block units, is formed by wobbling at a spatial period in accordance with a radial position, and the track is divided into a plurality of zones in a radial direction, and that data is recorded in each of the plurality of zones at a predetermined line density based on a ratio n/m (m and n are natural numbers) of a number of bits of a bit pattern of recording data to one wavelength of the wobbling,
the optical disc comprising:
a first area having at least one of the plurality of zones;a second area having at least one of the plurality of zones different from the at least one of the plurality of zones in the first area, and a line density of data different from a line density of data in the first area; anda Burst Cutting Area (BCA), where a zone format identifier specifying, for each of the plurality of zones, a zone table defining a boundary position of each of the plurality of zones and the ratio n/m of the number of bits, is recorded.