Abstract: An information recording medium of the present invention is an information recording medium in which data is recorded by using a data structure, the data structure including a file structure area and a data area. The data includes first AV data having a first attribute and second AV data having a second attribute which is different from the first attribute. The data area has continuous areas. At least one of the continuous areas includes a first extent in which at least a portion of the first AV data is recorded and a second extent in which at least a portion of the second AV data is recorded.

Abstract: A standard reproduction model for ensuring real time reproducing on a disk-shaped information recording medium, includes a pickup (102) that reads the real time data from the information recording medium, a buffer memory (103) that temporarily stores the real time data read by the pickup, and a decoding module (104) that reads the real time data from the buffer memory (103) and processes the read real time data. An access time Tacc of the standard reproduction model is expressed by the following formula, Tacc=A·dN+Trev+B where dN is a difference in rotational speed of the disk-shaped information recording medium, Trev is a rotation waiting time at a target access position, A and B are constants.

Abstract: Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.

Abstract: In order to perform simultaneous recording of a plurality of pieces of real time data, a large capacity of buffer memories were required. In addition, it was difficult to reproduce data which was recorded by a different apparatus. The present invention has an objective of providing an information recording medium, a simultaneous recording method, and an information recording and reproduction apparatus which guarantee simultaneous recording. The simultaneous recording is guaranteed by reproducing data in each of areas having at least a minimum size fulfilling the simultaneous recording condition which allows for the number of access operations which is twice the number of pieces of real time data to be recorded, and when the data amount in the buffer is empty, switching the current recording operation to another recording operation to continue recording.

Abstract: Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.

Abstract: A standard reproduction model for ensuring real time reproducing on a disk-shaped information recording medium, includes a pickup (102) that reads the real time data from the information recording medium, a buffer memory (103) that temporarily stores the real time data read by the pickup, and a decoding module (104) that reads the real time data from the buffer memory (103) and processes the read real time data. An access time Tacc of the standard reproduction model is expressed by the following formula, Tacc=A·dN+Trev+B where dN is a difference in rotational speed of the disk-shaped information recording medium, Trev is a rotation waiting time at a target access position, A and B are constants.

Abstract: An information recording method for recording information on a recording medium having a volume space by a system including a drive control unit and a system control unit is disclosed. The method includes notifying the drive control unit by the system control unit of position information, recording information by the drive control unit in the spare area based on the notified position information, generating replacement information by the drive control unit on the position at which the information is recorded in the spare area, and notifying the system control unit of the replacement information, instructing the drive control unit to change management information for managing the information recorded on the recording medium based on the notified replacement information, and changing the management information based on the instruction by the drive control unit.

Abstract: In an information recording medium for recording and reproducing data thereon on a sector-by-sector basis, the recorded data being managed as at least one file by using a file structure, the file structure includes unused space management information for identifying a used region and an unused region. At least one defective region is registered as an unused region in the unused space management information, the at least one defective region being a region on the information recording medium which is incapable of proper reproduction of the recorded data.

Abstract: In an information recording medium for recording and reproducing data thereon on a sector-by-sector basis, the recorded data being managed as at least one file by using a file structure, the file structure includes unused space management information for identifying a used region and an unused region. At least one defective region is registered as an unused region in the unused space management information, the at least one defective region being a region on the information recording medium which is incapable of proper reproduction of the recorded data.

Abstract: A recording device records various items of information onto a removable medium. The recording device includes a medium unit in which a removable medium is set, an obtaining unit that obtains information from an external source, a specifying unit that specifies an item of information whose recording detail is defined by a data format of the removable medium that is set in the medium unit, and a recording unit that judges whether an item of the information obtained by the obtaining unit matches the item specified by the specifying unit and records the obtained information onto the removable medium when judging affirmatively and onto another medium when judging negatively.

Abstract: The recording apparatus (300A) of the present invention includes a drive apparatus (320). The drive apparatus (320) includes a head section (334) for performing a recording operation or a reproduction operation for an information recording medium (100) and a drive control section (331) for controlling the head section (334). The drive control section (331) receives an update instruction including a third address indicating at least a part of the locations of the information recording medium (100) at which the first address information is recorded and the second address information.

Abstract: A recording method of the present invention includes the steps of: receiving a write instruction which specifies at least a logical sector in which data is to be written; determining whether the logical sector specified by the write instruction corresponds to a recorded physical sector or an unrecorded physical sector (S1111); when it is determined that the logical sector specified by the write instruction corresponds to an unrecorded physical sector, writing the data into the unrecorded physical sector (S1112); and when it is determined that the logical sector specified by the write instruction corresponds to a recorded physical sector, writing the data into an unrecorded physical sector other than the recorded physical sector (S1113), generating a remapping table including remapping information which remaps an original address of the recorded physical sector to a remapping address of the selected physical sector, and writing the remapping table on the write-once disc (S1114).

Abstract: A card information storage part (119) is provided in a semiconductor memory device (110) to store information of the characteristics of the semiconductor memory device (110). There is also provided a file system interface control part (120) for performing, based on the stored characteristic information, a file access suitable for the characteristics of the semiconductor memory device (110). This allows an access device (100) to perform an optimum file access via the file system interface control part (120) without awareness of the characteristics of the semiconductor memory device (110).

Abstract: An information recording medium including a plurality of sectors of the present invention includes: a first spare area including a spare sector for replacing a defective sector among the plurality of sectors; a defect management information area for managing the replacement of the defective sector by the spare sector; and a volume space in which user data can be recorded. The volume space is configured so that a second spare area including a spare sector for replacing a defective sector among the plurality of sectors can be additionally allocated. Location information indicating a location of the second spare area is recorded in the defect management information area.

Abstract: A recording apparatus for recording second information on a write-once recording medium having first information recorded thereon, the recording apparatus including: a host apparatus; and a drive apparatus, wherein the host apparatus includes a storage section for storing the second information; and an instruction section for instructing the drive apparatus to record the stored second information on the write-once recording medium, the drive apparatus includes a generation section for generating correlation information for correlating the first information and the second information; a head section for recording the second information on the write-once recording medium; and a control section for controlling the head section to record the second information and the correlation information on the write-once recording medium.

Abstract: A recording apparatus for recording information on a write-once recording medium, the write-once recording medium including a disk management information area and a volume space, the recording apparatus including: a host apparatus; and a drive apparatus, the host apparatus including: a first instruction section for instructing the drive apparatus to allocate at least one first track and at least one second track to the volume space; a second instruction section for instructing the drive apparatus to record a file on the at least one first track; a third instruction section for instructing the drive apparatus to record a file structure on the at least one second track, the file structure managing the file; a fourth instruction section for instructing the drive apparatus to record a virtual allocation table structure in the volume space, the virtual allocation table structure managing a recording location of the file structure; and a fifth instruction section for instructing the drive apparatus to record track

Abstract: A file system is enabled to use a Metadata Partition instead of VAT for write-once discs, and is provided by a pseudo-overwrite method with a plurality of tracks especially for metadata and file data. On applying this invention to a drive apparatus that supports pseudo-overwrite media, the file system distinguishes data to overwrite from data to append (S1701). When the data is newly written to a logical sector, the drive apparatus writes the data to a physical sector to which the logical sector corresponds (S1703). When the data being overwritten is data stored in the logical sector, the data is written to the other unrecorded physical sector in the volume space (S1704), and remapping information is written (S1705). The remapping information specifies the original address of the physical sector, and the remapping address of the physical sector in which the data is written.

Abstract: The control device (610) controls the recording of data onto an information recording medium where the number of re-writing data onto the same area is limited. The control device (610) determines whether data to be recorded is real-time data or non-real-time data (S1). When it is determined that the data to be recorded is real-time data, the real-time data is recorded in a circular manner onto a second area which is defined in advance within a first area which is assigned in advance on the information recording medium (S2 to S5). When it is determined that the data to be recorded is non-real-time data, the search for an unassigned area is performed from a predetermined address within the first area. The non-real-time data is recorded onto the unassigned area found as a result of the search (S6 and S7). The search for the unassigned area for recording the non-real-time data is also performed in the second area within the first area (S6).

Abstract: The present invention relates to a method for recording an AV file using an information recording disk in which data is recorded/reproduced by sectors. The recording method includes the steps of determining whether or not input data is AV data; detecting a defective sector existing in an assigned data recording area; when the input data is AV data while a defective sector is detected in the data recording area, allocating a defective extent including the defective sector; recording AV data in continuous sectors while skipping the defective extent; and allocating an area of continuous sectors where on the AV data is recorded as one AV extent.

Abstract: 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.