摘要:
An information recording method for a recording medium including a spiral or concentric-shaped groove structure along tracks formed on a disk-like substrate, wherein each of the tracks is divided into a plurality of recording units. Each of the recording units includes a blank portion in a circumferential direction of the groove structure, the blank portion being a non-groove portion, the groove structure being formed with a wobble in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track, and each length of the recording units is an integer multiple of the cycle of the wobble. The method includes irradiating a light beam to the recording medium, and recording information to the recording medium.
摘要:
An optical recording method for an optical medium including a disk-like substrate, a spiral or concentric-shaped groove structure along a track formed on the disk-like substrate, the groove structure being wobbled in a radial direction of the optical medium, the track being divided into a plurality of units in the track direction by at least one radial boundary line, at least two adjacent units in the radical direction of the medium comprise one zone, the optical medium including a plurality of zones, and the groove structure included in the adjacent units within any zone having substantially a same number of wobbling. The method includes providing the optical medium, and recording information on the optical medium by irradiating an optical spot thereon.
摘要:
An information reproducing apparatus for reproducing information recorded on an optical recording medium including a disk-like substrate, a plurality of tracks extending in a circumferential direction on the disk-like substrate and associated with a plurality of grooves wobbled in a radial direction, and a plurality of zones provided on the disk-like substrate and extending between a first position and a second position in a radial direction of the disk-like substrate. The information reproducing apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, an optical detector for detecting a reflected light from the medium, and a reproducer for reproducing information by using a signal from the optical detector.
摘要:
An optical recording apparatus having a light source and an optical system. The medium is a substrate in the form of a substantially circular disk with grooves and lands alternately formed on the substrate in a radial direction. The grooves and lands both serve as recording tracks which are divided into recording units in a circumferential direction. Each recording unit has an address area devoid of the grooves including first and second address information. The first address information is formed on a first boundary between one track and an adjacent track on one side of the one track, and the second address information is formed on a second boundary between the one track and an adjacent track on an other side of the one track with the first address information and the second address information not existing at opposing positions on the boundaries of the one track.
摘要:
An optical reproducing method for an optical medium, including a disk-like substrate, a spiral or concentric-shape groove structure along a track formed on the disk-like substrate, the groove structure being wobbled in a radial direction of the optical medium, the track being divided into a plurality of units in the track direction by at least one radial boundary line and at least two adjacent units in the radial direction of the medium comprise one zone. The optical medium includes a plurality of zones, and the groove structure included in the adjacent units within any zone have substantially a same number of wobbling. The method includes irradiating an optical spot on the optical medium, detecting a reflected beam from the optical medium, and reproducing information on the optical medium by using a signal obtained by the reflected beam.
摘要:
A method for reproducing information from an optical medium including a substrate with grooves and lands alternately formed on the substrate in a radial direction. The grooves and the lands both serve as tracks which are divided into units in the circumferential direction. Each unit has a prepit area in a non-groove portion of the substrate with a first prepit being represented as VFO information in the prepit area and a second prepit being represented as address information in the prepit area. The first prepit and second prepit are located on both sides of a center line of one track and are arranged with respect to one another. The method includes irradiating an optical spot on the optical medium, detecting address information, controlling the irradiation position of the optical spot on the basis of the address information and reproducing information.
摘要:
An information recording apparatus for recording information to an optical recording medium, including a disk-like substrate, a spiral or concentric-shaped groove structure along tracks formed on the disk-like substrate, each of the tracks being divided into a plurality of recording units, each of the recording units including a dropout portion in a circumferential direction of the groove structure, the dropout portion being a non-groove portion, the groove structure is formed with a wobble in a fixed cycle in a radial direction, the fixed cycle of the wobble continuing in the circumferential direction along the track; and each length of the recording units is an integer multiple of the cycle of the wobble. The information recording apparatus includes an irradiation source for irradiating a light spot on the optical recording medium, and a controller for controlling an irradiation position of an optical spot from the irradiation source.
摘要:
An information recording medium having spiral or concentric-shaped groove structure along a track formed on a disk-like substrate. The medium has the groove structure wobbled in a radius direction of the medium and the track is divided into a plurality of recording units in the track direction by at least one radial boundary. At least two adjacent recording units in the track direction of the medium comprise one zone and the medium includes a plurality of the zones. The groove structure included in the adjacent recording units within any zone has substantially the same number of wobbling.
摘要:
A disk-like information recording medium includes recording areas provided in both of a groove portion and a land portion. The information recording medium is divided into groups of a plurality of areas, each track is divided into circular arc-shaped sectors having the same central angle arranged to be radial in the radius direction, identification information is provided at every sector, each track is divided into groups in such a manner that lengths of the circular arc-shaped sectors become almost constant among the groups, and the groove portion and the land portion are wobbled in the radius direction of the information recording medium. When the groove portion information track and the land portion information track which are the recording portions are wobbled in the radius direction, position information can be reliably obtained from the recording portions, and hence recorded information can be accessed reliably. Also, an accuracy with which the rotation of the information recording medium is controlled can be raised, and it becomes possible to position recorded information accurately.
摘要:
A disk-like information recording medium includes recording areas provided in both of a groove portion and a land portion. The information recording medium is divided into groups of a plurality of areas, each track is divided into circular arc-shaped sectors having the same central angle arranged to be radial in the radius direction, identification information is provided at every sector, each track is divided into groups in such a manner that lengths of the circular arc-shaped sectors become almost constant among the groups, and the groove portion and the land portion are wobbled in the radius direction of the information recording medium. When the groove portion information track and the land portion information track which are the recording portions are wobbled in the radius direction, position information can be reliably obtained from the recording portions, and hence recorded information can be accessed reliably. Also, an accuracy with which the rotation of the information recording medium is controlled can be raised, and it becomes possible to position recorded information accurately.