42 results about "Optical data disk" patented technology

An object of the present invention is to provide a marking forming apparatus, a method of forming a laser marking on an optical disk, a reproduction apparatus, an optical disk, and a method of manufacturing an optical disk, capable of providing a greatly improved copy prevention capability as compared to prior known construction. To achieve this object, in the optical disk of the invention, for example, a marking is formed by a laser on a reflective film of a disk holding data written thereon and at least position information of the marking or information concerning the position information is written on the disk in an encrypted form or with a digital signature appended thereto.

A booting procedure can take a long time and typically starts from a lead-in on a main data layer of an optical data disc. A Portable-Blue (PB) disc, a dual boot disc, includes a second data layer (304) from which application specific optical drives can boot directly. The dual boot disc still conforms to the prior art standard for PB for normal applications. The second boot (340) will cut in booting time for a specific application and will make application software small. is in particular relevant for gaming, for portable devices and relative specific applications.

The present techniques provide methods and systems for alignment of a read head with data tracks on an optical data disk. In embodiments, a multi-pixel detector that is segmented into multiple areas, or detector segments, may be used to detect a pattern in the light reflected from an optical data disk. The detector system may then combine the quantized values from each of the detector segments mathematically to determine the alignment of the read head with a target data track. If the read head drifts to one side or the other, detectors to the side of a center detector may start to pick up energy from the adjacent tracks. If this energy is continuously summed for the detectors on each side, the read head may be centered by balancing the sums from the detectors on each side.

A method of recording additional information of a disk name of an optical disk, title information of a recorded program, etc., on the optical disk. Communication data containing edit data entered through a portable electronic machine capable of conducting wireless communications with an optical disk recording apparatus is transmitted by the portable electronic machine to the optical disk recording apparatus using the wireless communications and the edit data is recorded on the optical disk as additional information.

This invention discloses a protective disc and structure to hold an optical data disc to the protective disc so that if the during use the combination of the data disc and protective disc are mishandled the protective disc does not permit the data to become scratched. Instead the protective disc might become scratched. The data disc is held to the protective disc in a releasable fashion so that it can be removed from the protective disc and attached to another if the first protective disc becomes scratched. The data disc can be held to the protective disc with a set of prongs which are attached to the protective disc and can extend into contact with the edges of the data disc, and / or also into contact with the top surface of the data disc at the outside edges. Another alternative for holding the data disc to the protective disc include a band which extends entirely around the circumference of the discs. These alternative holding devices can be either a continuous ring or two semicircular rings which are held together by hinges and / or by clasps.

The present techniques provide methods and systems for more reliable reading of optical data disks. In embodiments, a multi-pixel detector that is segmented into multiple areas, or detector segments, may be used to detect a pattern in the light reflected from an optical data disk. The pattern may include light scattered from a single bit that may be under a center detector, as well as light scattered from proximate bits. The detector system may then combine the quantized values from each of the detector segments mathematically to determine the presence or absence of a bit or bits of data. The mathematical combination may also use data that is known about the status of adjacent data bits (such as previously read bits, or bit patterns which are allowed or not allowed by specific data encoding schemes) to improve the accuracy of the bit prediction.

The present techniques present methods and systems for increasing a data reading rate on optical data disks using a single reading head. The methods take advantage of the difference between a mean focal distance (MFD), or minimum spacing that the detector can distinguish between bits, and the minimum separation of bits in a single track to increase the reading speed. As the bits may be more closely spaced across adjacent tracks or layers, these techniques may be used to increase the reading speed of the disk. Specifically, the data symbols that make up a single bit-stream may be stored in a pattern horizontally across adjacent tracks, or vertically across adjacent layers. Accordingly, the focal point of the detector is scanned across the disk in the same pattern to read the individual data symbols.

The invention relates to the field of optical disk storage and provides an optical disk exchange and data storage separated optical disk jukebox system. The optical disk exchange and data storage separated optical disk jukebox system comprises a rear-end large-capacity optical disk jukebox and a front-end input-output optical disk jukebox which are connected with each other through a network bus. The rear-end large-capacity optical disk jukebox comprises a plurality of optical disk cabinets and rear-end controllers for controlling the optical disk cabinets. The optical disk cabinets are each composed of a plurality of optical disk boxes, and a plurality of optical disks are arranged in each optical disk box. The front-end input-output optical disk jukebox comprises a plurality of parallel CD drivers and front-end controllers for controlling the CD drivers. The optical disks in the CD drivers of the front-end input-output optical disk jukebox are in full-connection mapping relationship with the optical disks in the rear-end large-capacity optical disk jukebox. By means of the optical disk exchange and data storage separated optical disk jukebox system, data in the front-end input-out optical disk jukebox and data in the rear-end large-capacity optical disk jukebox are managed in a united mode, and the phenomenon that manual optical disk inserting and taking-out is low in efficiency and prone to error when data are directly read and written from the rear-end large-capacity optical disk jukebox in a data reading and writing process is avoided. Thus, efficient and intelligent management to a large optical disk jukebox is achieved.

An object of the present invention is to provide a marking forming apparatus, a method of forming a laser marking on an optical disk, a reproduction apparatus, an optical disk, and a method of manufacturing an optical disk, capable of providing a greatly improved copy prevention capability as compared to prior known construction. To achieve this object, in the optical disk of the invention, for example, a marking is formed by a laser on a reflective film of a disk holding data written thereon and at least position information of the marking or information concerning the position information is written on the disk in an encrypted form or with a digital signature appended thereto.

This invention discloses a protective disc and structure to hold an optical data disc to the protective disc so that if the during use the combination of the data disc and protective disc are mishandled the protective disc does not permit the data to become scratched. Instead the protective disc might become scratched. The data disc is held to the protective disc in a releasable fashion so that it can be removed from the protective disc and attached to another if the first protective disc becomes scratched. The data disc can be held to the protective disc by a band which extends entirely around the circumference of a data disc. The band can be comprised of two semicircular rings which are held together by hinges and / or by clasps so that as the semicircular rings are brought together they surround the edges of the protective disc and the data disc and hold the discs together. Alternatively, the band can be made of a continuous ring of heat shrink material. In this instance the band is applied around both the protective disc and the data disc, and then heat is supplied so as to shrink the band around the discs and hold them together.

An optical disk has transparent substrate layer (11) provided at light incidence side, first information layer (12) which has first groove of first depth (H1), adhesive layer (13) provided on the first information layer, and second information layer (14) which has second groove of second depth (H2) that is deeper than the first depth, and irreversibly records information therein, wherein the first depth and the second depth are lambda / 2n or less, the width of the first and second grooves is 0.3 [mu]m or less, the track pitch of the first and second grooves is 0.45 [mu]m or less, the first and second information layers include organic dye material having light absorption in the range of the wavelength of laser beam for use in recording and reproducing information from 390 nm to 420 nm.