摘要:
A method of recording/reproducing data on/from an optical recording medium is disclosed, comprising: reading speed information from a specific area of the optical recording medium, wherein the speed information comprises a first information indicating a maximum recording speed, a second information indicating a minimum recording speed, a third information indicating a predetermined recording speed different from the maximum and minimum recording speed, and a fourth information indicating a basic recording speed; and recording or reproducing the data on or from a main data area of the optical recording medium according to the read speed information.
摘要:
A read-only recording medium and a reproducing method thereof ensures reproduction compatibility with a rewritable recording medium in which real data is recorded with substantial discontinuity. The read-only recording medium comprises a data recording area in which real data is stored (VOB #x); and a plurality of waste areas (Waste Area) allocated at intervals in the data recording area. The method of reproducing data stored in a read-only recording medium reproduces data from the read-only recording medium, skips if a waste area (Waste Area) is encountered or removes invalid data reproduced from the waste area wherein each waste area has been inserted periodically in the read-only recording medium, and outputs the data reproduced before and behind each waste area in succession. As a result, the playability is improved in a disk device capable of reproducing both a read-only and a rewritable recording medium.
摘要:
A system for measuring the thickness of one or more layers (32) of an optical disc that includes a spacer layer (32b) and a cover layer (32a) by using an interference effect of an optical disc layer is disclosed. The apparatus comprises a spectroscope (42) to separate light, reflected from a surface of an optical disc, into constituent frequencies, an optical intensity measuring unit (44) to measure intensities of the constituent frequencies, respectively, as a first spectrum of data, and a processor (46). The processor (46) is adapted to do at least the following: convert the first spectrum data into a second spectrum of values that exhibits variation as a function of wavelength and refractive index, transform the second spectrum using a Fast Fourier Transform, and detect a thickness of one or more of the spacer layer (32b) and the cover layer (32a), respectively, based upon the transformed spectrum. Moreover, a corresponding device and machine-readable medium are disclosed.
摘要:
In a recordable optical disc including at least one recording layer, writing speed information and per writing speed write strategy information are recorded within disc control information, so that standardized disc control information can be uniformly applied to data recording and reproduction. At least one disc control information is recorded within the management area in per applicable writing speed order, and at least one disc information is recorded within a same writing speed in per recording layer order.
摘要:
A data structure of a control information for use with a recording medium having at least one recording layer. The control information includes at least two information units which include a first information unit for a lower writing speed and a second information unit for a higher writing speed. The first information unit includes write strategy parameters for a first write strategy type to be used for the writing speed. Said first write strategy type is one of a plurality of write strategy types applicable to the same writing speed and recording layer. The second information unit for a higher writing speed includes write strategy parameters for the first write strategy type or a second type to be used for the higher writing speed.
摘要:
A recording medium is disclosed, comprising: a control information area including a plurality of control information units to control a recording or reproducing of data to be recorded or recorded on a recording medium, wherein at least first control information unit in order includes an identifier to indicate a presence of copy protection information in the recording medium, and the copy protection information is required for a copy protection system; and a data area where data is to be recorded or recorded.
摘要:
A method of recording/reproducing data on/from an optical recording medium is disclosed, comprising: reading speed information from a specific area of the optical recording medium, wherein the speed information comprises a first information indicating a maximum recording speed, a second information indicating a minimum recording speed, a third information indicating a predetermined recording speed different from the maximum and minimum recording speed, and a fourth information indicating a basic recording speed; and recording or reproducing the data on or from a main data area of the optical recording medium according to the read speed information.
摘要:
An apparatus and method for testing mechanical endurance of a surface of an optical disc (30) is disclosed, which includes a rotating plate (20) on which the optical disc (30) is fixed to generate scratch thereon, and rotating the fixed optical disc (30); and a plurality of abrasion wheels (10) disposed in perpendicular to the rotating plate (20), and being in contact with the surface of the optical disc (30), to generate the scratch on the surface of the optical disc (30), wherein, the scratches generate when the optical disc (30) rotates a predetermined turn, e.g. below ten turns for applying a predetermined load generated from the abrasion wheel (10) on the optical disc (30).