Abstract: A disc-shaped information recording medium has a first and a second recording layer. A buffer area is arranged adjacent to a recording area of each of the layers for preventing deviation of the recording position onto/from each of the layers. A first part of the information is written along a first track path on the first recording layer, a predetermined amount of first buffer data in a part of the buffer area of the first recording layer is written into the first recording layer, and inter-layer jump is performed from the first recording layer to the second recording layer. A predetermined amount of second buffer data in the buffer area of the second recording layer is written in the second recording layer and write element is controlled to write a second part of the information to be recorded, on the second recording layer by changing the recording direction.

Abstract: An information recording medium (100) is provided with: a first recording layer (L0 layer) having a first calibration area (103-1) in which test information for calibrating a power of laser light in recording record information can be recorded; and a second recording layer (L1 layer) having a second calibration area (103-2) in which the test information can be recorded and in which at least one portion of a recording area faces the first calibration area, wherein the first calibration area and the second calibration area including a space area (103U-1, 103U-2) having a predetermined size in positions facing each other, the test information is recorded in a recording area (103R-1) located on one side, centered on the space area, in the first calibration area, and the test information is recorded in a recording area (103R-2) located on other side which is opposite to the one side, centered on the space area, in the second calibration area.

Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.

Abstract: An information recording apparatus (1) is provided with: a recording device (310) for recording record information onto an information recording medium by irradiating the information recording medium (100) with laser light with a recording power according to a set value; a calculating device (340) for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value on the recording device; a measuring device (330) for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value on the recording device; and an adjusting device (400) for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by the measuring device is different from the ta

Abstract: An information recording medium (100) is provided with: a first recording layer (L0) in which record information is recorded toward one direction directed from an inner circumferential side to an outer circumferential side, or directed from the outer circumferential side to the inner circumferential side, by irradiating laser light (LB) thereon; and a second recording layer (L1) in which the record information is recorded toward another direction which is different from the one direction, by irradiating the laser light thereon, directions of recording the record information being equal, in a particular recording area for focus-in of the laser light in said first recording layer and in at least one recording area of said second recording layer corresponding to the particular recording area.

Abstract: An information recording device comprising a recording unit that records recording information by applying a laser beam to an information recording medium having a first recording layer for recording recording information by being irradiated with a laser beam and a second recording layer for recording recording information by irradiating with a laser beam via the first recording layer, a calculating unit that calculates an optimum laser beam power when, by using the recording means, trial-recording trial information is recorded by irradiating the second recording layer with a laser beam via a recording-information-unrecorded recording area in the first recording layer and recording information is recorded by irradiating the second recording layer with a laser beam via a recording-information-recorded recording area in the first recording layer, and a control unit that controls the recording unit.

Abstract: An information recording apparatus has: a recording device for recording information onto an information recording medium, whose recording speed can be changed to first and second linear velocities, by irradiating laser light with a variable recording power; a measuring device for measuring reproduction quality by reproducing the record information recorded at the first linear velocity, if the recording speed is changed from the first linear velocity to the second linear velocity; a first calculating device for calculating a link power which is the recording power which gives the reproduction quality measured by the measuring device in the second linear velocity, on the basis of correlation information for representing a correlation between the recording power in the second linear velocity and the reproduction quality of the record information; and an adjusting device for adjusting the recording power at a time in stages or in continuity.

Abstract: A disc-shaped information recording medium has a first and a second recording layer. A buffer area is arranged adjacent to a recording area of each of the layers for preventing deviation of the recording position onto/from each of the layers. A first part of the information is written along a first track path on the first recording layer, a predetermined amount of first buffer data in a part of the buffer area of the first recording layer is written into the first recording layer, and inter-layer jump is performed from the first recording layer to the second recording layer. A predetermined amount of second buffer data in the buffer area of the second recording layer is written in the second recording layer and write element is controlled to write a second part of the information to be recorded, on the second recording layer by changing the recording direction.

Abstract: An information recording medium, provided with: a first recording layer (L0 layer) to record therein record information by irradiating laser light (LB); and a second recording layer (L1 layer) to record therein the record information by irradiating the laser light through the first recording layer, the second recording layer having a first calibration area (113) which is to record therein pattern information for obtaining an optimum power of the laser light and which corresponds to a recording area (104) of the first recording layer in which the record information is unrecorded, a head portion of the first calibration area being disposed at a position where it is displaced by a predetermined distance toward a direction of recording the pattern information, on the basis of a head portion of the recording area of the first recording layer in which the record information is unrecorded.

Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.

Abstract: An information recording apparatus irradiates a laser light onto an information recording medium such as an optical disc to record data. While recording, the information recording apparatus temporarily stops recording when a predetermined amount of data is recorded, and confirms recording quality. Namely, the apparatus reproduces the recorded data and determines the recording quality based on the reproduced data. If the recording quality is within an appropriate range, recording of the actual data is continued at the recording power. If the recording quality is out of the appropriate range, the recording power is corrected so that the recording quality becomes within the appropriate range, and the actual data is recorded. Thereby, even when the optimum recording power is changed after recording start of the actual data, the recording power can be correspondently corrected, and accurate information recording with the appropriate recording power can be realized.

Abstract: An information recording apparatus for recording information with less waveform deformation with an adequate modulation degree and with a high asymmetry, an information recording method, and an information recording program. An information recording apparatus in which a laser beam is applied to a recording medium and a recording mark corresponding to a recording signal is formed includes a light source for emitting a laser beam and signal generating means for generating a recording pulse signal for driving the light source according to the recording signal. The recording pulse signal includes a mark period during which a recording mark is formed and a space period during which no recording mark is formed. During the mark period corresponding to a long mark, the level of the recording pulse signal corresponds to a recording power with which the reproduction compatibility is ensured and the waveform distortion is at or below a predetermined value.

Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.

Abstract: When a bias power level of a recording pulse waveform is varied entirely or partially, a shape of the recording pulse wave form is varied according to the variation. For example, when the bias power level is increased, a width or an edge position of a top pulse or a multi-pulse of the recording pulse waveform is varied correspondingly. Thereby, a total heat quantity of a recording laser light is not increased, and a preferable recording characteristic is maintained.

Abstract: The present invention provides a recording pulse generating apparatus capable of forming a recording pit having a proper shape even at the time of ultra-high-speed recording of, for example, 8×recording or higher. A recording controller 10 for generating recording pulse signals having lengths corresponding to ten kinds of lengths of pits formed at the time of recording information has a recording controller 10 for generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 4T changes from a first amplitude to a second amplitude, and generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 5T or longer changes from a third amplitude to a fourth amplitude and further changes to a fifth amplitude.

Abstract: The present invention provides a recording pulse generating apparatus capable of forming a recording pit having a proper shape even at the time of ultra-high-speed recording of, for example, 8× recording or higher. A recording controller 10 for generating recording pulse signals having lengths corresponding to ten kinds of lengths of pits formed at the time of recording information has a recording controller 10 for generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 4 T changes from a first amplitude to a second amplitude, and generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 5 T or longer changes from a third amplitude to a fourth amplitude and further changes to a fifth amplitude.

Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.

Abstract: An information recording device (1) includes: recording elements (501) for recording information on an information recording medium by recording layer light having adjustable recording power; optimization elements (571) for controlling the recording elements so as to modify the recording power at least into several levels and recording real data corresponding to the data used by the recording elements when recording information; and adjusting elements (504) for adjusting the recording power in the recording elements to be an optimal value.

Abstract: An information recording device and method capable of forming a recording mark by suppressing thermal interference. The device applies a laser beam to a recording medium and forms a recording mark in accordance with a recording signal. The device includes a light source for emitting the laser beam, signal generation elements for generating a recording pulse signal according to the recording signal, and drive elements for driving the light source according to the recording pulse signal. The recording pulse signal has a mark period for forming the recording mark and a space period. The recording pulse signal makes the level in the entire space period equal to or shorter than a predetermined length and a part of the space period longer than the predetermined length to be off level. While the recording pulse signal is off level, the recording medium is cooled down, thereby suppressing the affect of thermal interference.

Abstract: An information recording medium includes: a first recording layer to for recording first information; and one or a plurality of second recording layers, disposed on the first recording layer, for recording second information. Each recording layer has a predetermined area in which power calibration is performed to detect an optimum recording power of laser light for recording, which is transmitted through the first recording layer and other layers of the second recording layers, the first recording layer, the other layers of the second recording layers, and each of the second recording layers arranged in this order as viewed from an irradiation side of the laser light, and in a facing area, which faces the predetermined area, in the other layers of the second recording layers and the first recording layer, by forming embossed pits.