摘要:
The present invention relates to a method of writing information on an optical recording medium (10 to 38), the optical recording medium having at least one data layer (40) for storing data readable by use of an optical readout device and at least one label layer (42) for storing visible information, the method comprising the steps of: focusing a first wavelength laser beam (44 to 58) onto the at least one data layer for writing data on the data layer, and focusing a second wavelength laser beam (60 to 78) onto the at least one label layer for writing visible information on the label layer, thereby a laser spot size being usable that is also employable when using the second wavelength laser beam for writing data on a data layer for storing data readable by use of an optical readout device. The present invention further relates to an optical recording medium and to a method of manufacturing an optical recording medium.
摘要:
An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.
摘要:
An apparatus generates outgoing data (OD) to be provided on an optical disk (1) in a burst cutting area (2). The burst cutting area (2) further comprises markings (3) which cause a marking frequency spectrum (MFS) when reading out the burst cutting area (2). The apparatus comprises a channel coder (4) which receives processed data (PD) and supplies the outgoing data (OD) having an outgoing data frequency spectrum (DFS) with suppressed DC-content. The apparatus further comprises a data processing device (5) which generates the processed data (PD) to obtain an outgoing frequency spectrum (DFS) wherein a frequency component causing interference with a low frequent component of the markings (3) is suppressed or not present.
摘要:
An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.
摘要:
Current BD specification prescribes that in an ADIP an address is expressed with 21 bits, 19 to indicate the corresponding RUB number, and 2 to be set to 00, 01 and 10 consecutively in the 3 successive ADIP corresponding to one RUB, the smallest addressable portion of data on a disc. From this it derives that at most 32.2 GB of storage space can be addressed. Due to recent developments however, a storage capacity of 35 GB per layer could be achieved. According to the invention, one or more bits are added to the 21 bits currently allocated to express an address. This additional bits however are not stored in the ADIP but left implicit, exempting from a heavy deviation from the current BD encoding rules. The additional bits are reconstructed by an apparatus on the basis of the position on the information carrier where the corresponding RUB is present.
摘要:
The present invention relates to information carriers in general and high density discs such as Blu-ray discs in particular. According to the invention a system is provided comprising an information carrier (1) and an apparatus for accessing said information carrier The information carrier having recording unit blocks (400), comprising a sequence of channel bits, a link frame (402, 403) and a physical cluster, the link frame comprising a frame sync (42, 44) and a link area (43, 45). The apparatus comprises: a bit recovery unit (308), operating upon a set of control parameters, capable of retrieving a number of channel bits, on condition that the control parameters have values in respective valid ranges, and an adaptive parameters adjustment unit (309), for adjusting the set of control parameters, based upon the sequence of said channel bits, so as to bring the control parameter in the respective valid ranges. Thus, the link area comprises a link pattern for facilitating the adaptive parameters adjustment unit in adjusting the set of control parameters. Moreover, the Link pattern comprises a sequence of markers defined by a polarity transition, which encode auxiliary information bits, and that said adaptive parameters adjustment unit is configured to use the auxiliary information for adjusting said set of control parameters.
摘要:
When duplicating the record carrier the angle between the sync words S1 S2 can be preserved at the cost of a change in bit length, or the bit length can be preserved at the expense of changes in the angle between the sync words S1 S2. Consequently a playback device that checks for both changes in the angle between the sync words S1 S2, or between other marks, and for changes in bit length can detect an illegally duplicated record carrier with a high certainty.
摘要:
A drive, a method of operating the drive and a hybrid disc, BD9, comprising the physical layer of a dual layer DVD disc, DVD9, and the application layer of a Blu-ray disc (BD). The disc comprises a reserved area containing a modulation code and a file structure of the application layer and a BD-ROM mark for a copy protection system (CPS) according to the established BD-ROM format. The disc is readable by a conventional DVD drive, but the firmware and specific hardware and software (47,48,49) for detecting the BD-ROM mark is used. In this way, present DVD or BD drives need only firmware upgrades.
摘要:
An apparatus generates outgoing data (OD) to be provided on an optical disk (1) in a burst cutting area (2). The burst cutting area (2) further comprises markings (3) which cause a marking frequency spectrum (MFS) when reading out the burst cutting area (2). The apparatus comprises a channel coder (4) which receives processed data (PD) and supplies the outgoing data (OD) having an outgoing data frequency spectrum (DFS) with suppressed DC-content. The apparatus further comprises a data processing device (5) which generates the processed data (PD) to obtain an outgoing frequency spectrum (DFS) wherein a frequency component causing interference with a low frequent component of the markings (3) is suppressed or not present.
摘要:
An information carrier for holding user information, the information carrier comprising access information in the form of access information bits for accessing the user information, the access information bits being stored on the information carrier in a variation of a parameter, which variation is detectable by integration detection. The access information bits are scrambled according to a pre-determined scrambling method. By scrambling the access information bits according to a pre-determined scrambling method, detection of the access information is not possible as long as the scrambling method is not known. Using the integration detection technique, the only way to obtain the access information is by knowing how the signal obtained after reading-out the area comprising the access information bits must be processed. In this way illegal retrieval of the user information is further prevented.