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US 2002/0159370 A1Published application
Information recording medium, information reproduction apparatus, and information recording apparatus
AssigneeKabushiki Kaisha Toshiba
InventorHideaki Ohsawa
Life of this patent
Estimating the term…
Abstract
An information recording medium according to an embodiment of this invention has a plurality of disk-like information recording layers, which are adhered to each other within an allowable decentering error range, and a data area assured on each information recording layer, and has guard tracks within the range of a predetermined radial distance from the radial position of the innermost periphery of the data area toward the outer periphery.
Claims9
An information recording medium comprising:
- a plurality of disk-like information recording layers which are adhered to each other within an allowable decentering error range,
- each of said information recording layers comprising:
- an embossed lead-in area which is located at a predetermined radial position and is recorded with lead-in data by embossed pits;
- and
- a data area which neighbors said embossed lead-in area, and is located on an outer periphery side of said embossed lead-in area, and
- said data area comprising:
- guard tracks which are formed within a range of a predetermined radial distance from a radial position of an innermost periphery of said data area toward an outer periphery side;
- and
- data recording tracks which are formed on the outer periphery side of said guard tracks and are used to record phase change recording marks that reflect user data.
6 more elements
An information reproduction apparatus for reproducing information from an information recording medium, comprising:
- an irradiation section configured to irradiate said information recording medium with a light beam;
- and
- a reproduction section configured to receive the light beam reflected by an embossed lead-in area and data recording tracks on said information recording medium, and to reproduce data reflected in the reflected light beam,
- said information recording medium comprising:
- a plurality of disk-like information recording layers which are adhered to each other within an allowable decentering error range,
- each of said information recording layers comprising:
- said embossed lead-in area which is located at a predetermined radial position and is recorded with lead-in data by embossed pits;
- and
- a data area which neighbors said embossed lead-in area, and is located on an outer periphery side of said embossed lead-in area, and
- said data area comprising:
- guard tracks which are formed within a range of a predetermined radial distance from a radial position of an innermost periphery of said data area toward an outer periphery side;
- and
- said data recording tracks which are formed on the outer periphery side of said guard tracks and are used to record phase change recording marks that reflect user data.
10 more elements
An information recording apparatus for recording information on an information recording medium, comprising:
- an irradiation section configured to irradiate said information recording medium with a light beam;
- and
- a recording section configured to irradiate data recording tracks on said information recording medium with the light beam to record data,
- said information recording medium comprising:
- a plurality of disk-like information recording layers which are adhered to each other within an allowable decentering error range,
- each of said information recording layers comprising:
- an embossed lead-in area which is located at a predetermined radial position and is recorded with lead-in data by embossed pits;
- and
- a data area which neighbors said embossed lead-in area, and is located on an outer periphery side of said embossed lead-in area, and
- said data area comprising:
- guard tracks which are formed within a range of a predetermined radial distance from a radial position of an innermost periphery of said data area toward an outer periphery side;
- and
- said data recording tracks which are formed on the outer periphery side of said guard tracks and are used to record phase change recording marks that reflect user data.
10 more elements
Dependencies are inferred from the claim text.