摘要:
A device for recording information writes marks in a track on a record carrier of a writable type. The device records the information according to a predefined recording format like DVD for constituting a recording area containing user data preceded by a lead-in zone and followed by a lead-out zone located at the end of the user data. The device has a lead-out unit for finalizing the record carrier for playback on a reading device for read-only type record carriers. The finalizing starts with determining if data written in the recording area extends up to a predefined physical position. If the data extends at least up to the predefined position, no lead-out information is recorded, and if not, lead-out information is recorded up to the predefined position.
摘要:
A device for recording information on a record carrier (11) is arranged for formatting a multilayer record carrier. The device has formatting means (16) for formatting the record carrier according which formatting includes de-icing by, in the event that locations in the user data area have not yet been recorded, writing dummy data (60) on the locations. The formatting means (16) determine a first radial position (50) and a first layer (40), which first radial position is indicative of a location on the first layer on which user data will be recorded first according to a predefined recording format. Subsequently said de-icing is started by writing of dummy data on a second layer (41) of the record carrier at the first radial position, opposite the location of the first user data (55). Hence a de-iced area (58) is created opposite the user data (55).
摘要:
A method for writing data to an optical storage medium which includes a storage space with blocks having hardware addresses (HA). The storage space includes a pre-embossed area, and the data to be written includes data addresses (DA). Data having data addresses DA=X are stored in storage space blocks having hardware addresses HA=XΔ, wherein Δ is an integer equal to 1 or more.
摘要:
The invention relates to a method and a device for recording information on a recordable multi-layer DVD disc wherein information is incrementally recorded on the disc such that the area regarded as containing written information on the first information layer is substantially equal to the area regarded as containing written information on the second information layer. However, an area regarded as containing written information may comprise an area where no information is recorded. In this way a recordable disc is produced from which DVD-ROM players can retrieve the recorded information.
摘要:
When writing on a recordable medium the recorder can encounter write errors. When a write error occurrs the record carrier is discarded. By ignoring write errors in sections of the record carrier comprising unused information, for instance sections of the lead-in or lead-out the record carrier no longer needs to be discarded.
摘要:
The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4′) other than the data recording area (5). The data recording area (5) has a first tracking structure (8′), whereas the identification mark area (4, 4′) is substantially free from a tracking structure or has a second tracking structure (8″) substantially different from the first tracking structure (8′).Thus erasure of the identification mark is practically impossible, because the location of the erasing spot of a recorder cannot be controlled precisely in radial direction.
摘要:
A device for recording information on a storage medium (11) is arranged for formatting the storage medium. The device has receives a format command according to a protocol (ATA/ATAPI). The device has formatting means for formatting a multilayer storage medium according to the format command. The formatting includes recording, on each layer (L0, L1) of the multilayer storage medium, a first control zone (71, 72) at a first radial position on the layer and a second control zone (73, 74) at a second radial position on the layer for forming an annular data zone of a selected size between the control zones. If the format size is smaller than a maximum available size on the storage medium, the control zones are positioned on substantially equal radial positions for forming radially corresponding annular data zones (75, 76). The required format size equals the sum of the selected sizes of each annular data zone.
摘要:
The continuous update of the Recorded Area Indicator on a DVD+R disc leads to a loss in performance of the recorder. If the update is not continuous, the Recorded Area Indicator on the disc may not accurately reflect the status. In order to ensure that the Recorded Area Indicator accurately reflects the status but avoids loss of performance, the update of the Recorded Area Indicator is performed when a close track session command is issued to the drive signaling the end of the recording, regardless of whether the track or session on the disc remains open. During the recording the Recorded Area Indicator is kept and updated in the memory of the recorder.
摘要:
A disc recording device has a mode control unit for switching the device either to a read mode or to a write mode. Reading and writing can be alternated for simultaneous recording and reproducing of video. A rotation speed control unit sets the rotation speed of the record carrier, and has a speed selector for selecting one of at least two speed settings for the read mode in dependence on an actual rotation speed of the record carrier during the write mode when switching from write mode to read mode. By setting the read speed to one of a limited number of settings the difference in rotation speed between said actual rotation speed and the speed in the read mode is limited. Due to the limited differences power dissipation is limited, while the performance of access time and playability of real-life discs is at a high level.
摘要:
Data storage system (1) comprises: an optical disc (2) having a storage space (3) for receiving sectors of data; a disc drive (10), suitable for writing information to the disc; a host (20), capable of cooperating with the drive; the host being designed to send to said drive a write encrypted sector command WESC(EKI) for commanding said drive to write one or more bus-encrypted sectors to said disc, WESC(EKI) including an encryption key identifier EKI; the drive being designed, in response to receiving said WESC(EKI), to evaluate the value of EKI, and, if the value of EKI indicates a bus-encrypted user data portion (32E), to decrypt this user data portion, to generate a header portion (31) with bus encryption information BEI, to combine this header portion with the decrypted user sector portion (32) to make a data sector (30), and to write the data sector (30) to the disc.