摘要:
The present invention relates to reproducing a unique identifier (ID) from a rec ord carrier (5), a data which has area for storing data and a defect management area for storing data reallocated from defective sectors and for storing realloc ation information. To prevent users from copying the unique identifier a reprodu ction apparatus is proposed comprising: - a reallocation information reading mea ns (7) for reading reallocation information from said defect management area ma rking a first predetermined non-defective sector in said data area as defective and as reallocated to a second sector in said defect management area, - a data r eading means (6, 8) for reading a first data unit from said first sector and for reading a second data unit from said second sector, and - an evaluation means 10) for evaluating said first data unit and said second data unit by comparison and/or combination to derive said unique identifier(ID ).
摘要:
The present invention relates to a drive ( 2 ) for use in a computer or a reproduction device for accessing a record carrier. According to the invention via a specific action, supervised by the drive ( 2 ), the drive mimics the presence of a disc by sending a disc insertion message to the host ( 3 ). After that the drive ( 2 ) will give the host ( 3 ) (the virtual) file system contents of the virtual disc, which, for instance, contains a link to an auto-run file. This auto-run file tells the host ( 3 ) to perform certain actions, such as going to the specified internet site or executing a file from the virtual disc.
摘要:
A recording apparatus for recording digital information signals on a removable rewritable disc like recording medium has been proposed. The apparatus comprises writing means (21, 22, 25) for recording the digital information signals and control means (20) for controlling the recording. The apparatus is capable of storing first file system data and second file system data addressing user data in a user area (UA) on the medium. The control means (20) are adapted to define partitions for both file systems such that the partitions start at the same location and to store the second file system directory entries outside the first file system partition. This reduces time and space necessary for handling the second file system data by allowing two file systems to share their file entries, while protecting the second file system directory entries from being erased when the medium is under control of the first file system.
摘要:
A device for recording records information in blocks having logical addresses at a physical address in a track on a record carrier. The logical addresses are translated into the physical addresses in dependence of defect management information, such as primary and secondary defect lists and remapping tables, maintained in defect management areas (61). The defect management information includes assignment information indicative of assignment of physical addresses in parts of the track to user data areas or to defect management areas. The device has assignment means for dynamically adapting the assignment information in dependence of detected defects (54) by assigning an additional physical address range to an additional defect management area (61). The additional physical address range starts near the detected defect (54). Hence the defect (54) is covered by a defect management area, which reduces the need for remapping.
摘要:
A device for recording records a series of blocks (42) having continuous logical addresses, e.g. digitally encoded video, on a record carrier at a corresponding physical address range. Some physical addresses are assigned to defect management areas (43). The logical addresses are translated into the physical addresses in dependence of the defect management information. The device has contiguous recording means for detecting if the allocated physical address range is interrupted by a subset of physical addresses assigned to a defect management area. If so, the subset of physical addresses is reallocated to the user data area. The series of blocks (42) is contiguously recorded extending over the subset of physical addresses. The defect management area may be eliminated, shifted to a new location (51) after the end of the recorded file or shifted to the end of the medium.
摘要:
A recording apparatus for recording data on a rewritable optical recording medium has been proposed. The apparatus comprises input means (27) for receiving the data, recording means (21, 22, 25, 28, 29) for recording the data, reading means (21, 22, 25, 30) for reading the recorded data, error correction means (30) for finding and correcting errors in the recorded data read and control means (20) for controlling the recording and reading of the data. The recording apparatus is capable of performing fast and efficient examination of formatted recording medium in order to adapt a data recording strategy, so as to increase the efficiency of writing operations.
摘要:
A method of recording digital information signals on a removable rewritable disc like recording medium, the method comprising recording user data on a logical area of the disc and, prior to removal of the disc out of a recording/reproducing apparatus, finalizing the disc with a lead-in and lead-out area comprising predefined medium format data. A general purpose area within the logical area for other use than recording of user data, is being reserved. Such as use may be for example defect management. Further the method involves interrupting recording a lead-in area or a lead-out area at predefined splice points whenever a request for user data is made.
摘要:
The present invention relates to a method of ensuring seamless playback of video files stored as a BDFS (Blu-ray Disc File System) file in a UDF (Universal Disk Format) file system using a UDF and BDFS combination format, said method of seamlessly playing back the video files comprising the step of creating a BDFS extent by mapping it to at least one UDF extent, wherein said mapping is based on rules defined by BDFS.
摘要:
A device for recording blocks of information on logical addresses on a writeonce record carrier at corresponding physical addresses. The logical addresses are translated into the physical addresses by addressing means (31). Allocation means (32) define a continuous addressing space for a user area and divide it into a front area, a middle area and a rear area for sequentially recording information by allocating to them parts of the user area address range. The device has re-allocation means (33) for splitting the middle area into new areas, specifically when no more data can be stored in the rear area or the front area.