摘要:
In an optical disk recording method of recording data onto a recordable optical disk which includes a data zone where data is recorded and a management data zone where management data indicating the recorded part of the data zone is recorded, an extended management data zone in which the management data is to be recorded is set in the data zone in response to an extension instruction.
摘要:
In order to stably carry out reproduction of information in an optical disc medium (10) using a PRML (partial-response maximum-likelihood) method for reproducing the signal, the optical disc medium (10) has not only a data recording area (14) where data is recorded at high density but also a system information recording area (16) where information is recorded at low density and binary equalizing/reproducing can be easily made. Information required to circuit setting is recorded in the system information recording area.
摘要:
An optical disc medium includes a system area and a data area following the system area. A plurality of sets of an extended record control data area, a bordered area, and a border are possibly set in the data area continuously from the system area, and a first set of the plurality of sets does not include the extended record control data area. A user data is recorded in each of the bordered areas. In each of the plurality of sets other than the first set, a record control data associated with the user data which is recorded in the bordered area of the set is recorded in the extended record control data area.
摘要:
Areas, which are located on the inner peripheral sides of multi-layered information recording areas (20) and have the same radial ranges, are set as burst cutting area forming zones, and a burst cutting area (BCA) (101) is formed in one information recording layer. All of the same radial ranges of the other information recording layers are formed as mirror surfaces (5). Thereby, interference from other layers and scattering of readout light are prevented, so reading of the burst cutting area (BCA) is realized stably.
摘要:
In an optical disk medium, land recording tracks (1) are coupled by first and second coupling portions (3 and 4) at a particular radial position to form a tilt detecting mark SM.
摘要:
In order to stably carry out reproduction of information in an optical disc medium (10) using a PRML (partial-response maximum-likelihood) method for reproducing the signal, the optical disc medium (10) has not only a data recording area (14) where data is recorded at high density but also a system information recording area (16) where information is recorded at low density and binary equalizing/reproducing can be easily made. Information required to circuit setting is recorded in the system information recording area.
摘要:
It is an objection of the invention to provide a rewritable optical disk system, which can discriminate the position of a spot on an optical disk by detecting the difference in a intensity distribution of a reflected light from the optical disk between a land track and a groove track. The spot positions detected by partially detecting the intensity distribution of the reflected light in a condition that the spot on the optical disk is lightly defocused, and thereby the difference in the intensity distribution of a reflected light between the land and groove tracks can be discriminated.