Optical disk having sequentially numbered sectors and logical tracks formed by a series of 2.sup.n sectors, and disk drive apparatus for using such an optical disk
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKyosuke Yoshimoto, Kazuhiko Nakane, Teruo Furukawa
Life of this patent
Estimating the term…
Abstract
An optical disk has a recording region divided into zones, each zone including a number of adjacent physical tracks. An integer number of sectors are provided in each physical track. The angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sequentially numbered sectors. A logical track includes a series of 2.sup.n sectors, n being an integer.
Claims7
An optical disk comprising:
- a recording region having a plurality of sectors with a predetermined length, the sectors being arranged on a spiral or a concentric circle formed on the recording region;
- wherein the sectors are sequentially numbered as addresses using binary digits, the addresses are included in a header field of each of the sectors, and a logical track, as a unit for an access operation, is formed by a series of 2.sup.n sectors, where n is an integer.
An optical disk drive device for use with an optical disk including a recording region, and a plurality of sectors with a predetermined length, the sectors being arranged on a spiral or a concentric circle formed on the recording region;
- wherein the sectors are sequentially numbered as addresses by using binary digits, the addresses are included in a header field of each of the sectors, and a logical track, as a unit for an access operation, is formed by a series of 2.sup.n sectors, where n is an integer;
- and
- the optical disk drive device determines the logical track address by extracting a predetermined number of bits from a beginning of the address for each sector.
An optical disk drive device for use with an optical disk including a recording region and a plurality of sectors with a predetermined length, the sectors being arranged on a spiral or a concentric circle formed on the recording region;
- wherein the sectors are sequentially numbered as addresses using binary digits, the addresses are included in a header field of each of the sectors, and a logical track, as a unit for an access operation, is formed by a series of 2.sup.n sectors, where n is an integer;
- and
- the optical disk drive device determines an order of the sector in the logical track by extracting a predetermined number of bits from an end of the address for each sector.
Dependencies are inferred from the claim text.