摘要:
A memory device, includes a recording medium; a probe to write a plurality of the signals; a first driving portion to vibratory drive the recording medium; a detecting unit which, when the first driving portion changes a frequency to vibratory drive the recording medium, detects a change in an amplitude of the resonance drive, detects the frequency at which the amplitude becomes maximum as a resonance frequency; and a calculating unit which calculates a timing when the probe writes a plurality of the signals using the resonance frequency; wherein, the first driving portion vibratory drives the recording medium and the probe writes a plurality of the signals.
摘要:
A focus servo control device includes a first detector, first controller, second detector, and second controller. The first detector detects a first focus error signal. The first controller controls the objective lens based on the first focus error signal, so that a focal point of the first laser agrees with the guide layer. The second detector detects a second focus error signal. The second controller changes a relative distance between the focal point of the second laser and the focal point of the first laser, so that the focal point of the second laser agrees with a target recording/reproducing layer.
摘要:
According to one embodiment, an information storage medium in which layer 0 and layer 1 are arranged from a read surface, a system lead-in area, data lead-in area, data area, and middle area are arranged from an inner circumference of the layer 0, and a system lead-out area, data lead-out area, data area, and middle area are arranged from an inner circumference of the layer 1. A guard track zone is arranged on a side of the data area in the data lead-out area, and a reference code zone, R physical format information zone, recording management zone, and drive test zone are arranged in the data lead-in area of the layer 0 and padding of the guard track zone of the data lead-out area is performed after padding of the drive test zone of data lead-in area and recording of the recording management zone.
摘要:
In an optical disk system using a PRML identification system, a method for deriving an optimum recording wave in a short period of time is provided. Parameters of the recording wave are adjusted by using an evaluation value obtained by a signal evaluation method which is suitable for the PRML identification system as an index. In this case, as a parameter adjusting method, a plurality of adjusting methods are utilized.
摘要:
An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer 1 is positioned outer than a start position of the data area of layer 0, the data lead-in area comprises a guard track zone wider than a test zone in the data lead-out area, the data lead-out area comprises a guard track zone wider than a test zone and a management zone in the data lead-in area, the middle area of layer 0 comprises a guard track zone wider than a test zone in the middle area of layer 1, and the middle area of layer 1 comprises a blank zone wider than a test zone in the middle area of layer 0.
摘要:
An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer 1 is positioned outer than a start position of the data area of layer 0, the data lead-in area comprises a guard track zone wider than a test zone in the data lead-out area, the data lead-out area comprises a guard track zone wider than a test zone and a management zone in the data lead-in area, the middle area of layer 0 comprises a guard track zone wider than a test zone in the middle area of layer 1, and the middle area of layer 1 comprises a blank zone wider than a test zone in the middle area of layer 0.
摘要:
A system lead-in area, data lead-in area, data area, and middle area are sequentially arranged from an inner circumference of layer 0. A system lead-out area, data lead-out area, data area, and middle area are sequentially arranged from an inner circumference of layer 1. A guard track zone is arranged in the data lead-out area. A reference code zone, R physical format information zone, recording position management zone, and drive test zone are arranged in the data lead-in area of the layer 0 corresponding to the guard track zone. Padding of the guard track zone of the data lead-out area is performed after padding of the drive test zone of data lead-in area and recording of the recording position management zone, the reference code zone of the data lead-in area, and the R physical format information zone of the data lead-in area.
摘要:
An information recording medium includes a user information storage area which stores user information, a test write area which is extendable and for test write of information, a spare area which is extendable and capable of alternatively storing user information, and a recording position management information area including recordable range information expressing recordable ranges in the aforesaid test write area and the aforesaid spare area. The information recording medium, an information reproducing apparatus, an information reproducing method and an information recording method which make it easy to record and reproduce information properly are provided.
摘要:
A system lead-in area, data lead-in area, data area, and middle area are sequentially arranged from an inner circumference of layer 0. A system lead-out area, data lead-out area, data area, and middle area are sequentially arranged from an inner circumference of layer 1. A guard track zone is arranged in the data lead-out area. A reference code zone, R physical format information zone, recording position management zone, and drive test zone are arranged in the data lead-in area of the layer 0 corresponding to the guard track zone. Padding of the guard track zone of the data lead-out area is performed after padding of the drive test zone of data lead-in area and recording of the recording position management zone, the reference code zone of the data lead-in area, and the R physical format information zone of the data lead-in area.
摘要:
According to one embodiment, a storage medium includes a burst cutting area at an inner periphery, wherein the burst cutting area has includes plural burst-cutting-area data areas.