MXPA06010600A - Recording medium with overlapping segment information thereon and apparatus and methods for forming, recording, and reproducing the recording medium - Google Patents

Abstract

A recording medium, such as a high-density and/or optical recording medium including segment information recorded thereon, and apparatus and methods for recording to and reproducing from the recording medium, in order to improve data protection, data management and/or reproduction compatibility. The recording medium may contain at least one segment area which is an area on the disc controlled by a plurality of valid PACs and if the designated segment areas overlap with one another, control information of the respective PACs which control the overlapped area may be applied to control the overlapped area.

Description

RECORDING MEDIA WITH TRANSLATION SEGMENT INFORMATION IN THE SAME AND APPARATUS AND METHODS TO FORM, RECORD AND REPRODUCE THE MEDIA OF RECORDING DESCRIPTION OF THE INVENTION The present invention relates to managing physical access control (PAC) and recording data, means containing PAC and recording data (e.g., high density optical discs, such as Blu-ray Disc) and apparatus. and methods for recording and / or reproducing data up to and / or from the media. Means, for example, optical discs can be used to record a large amount of data. From the available optical discs, a new high density optical medium (HD-DVD), for example, the Blu-ray Disc (after that called "BD") is under development, which allows recording and increased storage of videos High definition and / or audio data. The BD also includes a rewritable Blu-ray disc (BD-RE), recordable Blu-ray disc (BD-WO), and read-only Blu-ray disc (BD-ROM). Currently, a problem such as existing systems is the potential incompatibility between disk drives of different versions, for example a disk drive from a previous version with a previous set of capabilities that may have difficulty interacting with a medium that has interacted with a disk. disk unit that includes at least one capacity of a subsequent set of capabilities. The exemplary means of the present invention provide a PAC allocation unit that includes segment information in a medium, such as a high density optical disk, and apparatus and methods for recording data up to and reproducing data from the medium using a unit. PAC assignment that includes segment information that identifies at least one segment or a user data area, where the segments of the same PAC allocation unit do not overlap. Exemplary embodiments of the present invention provide a PAC allocation unit that includes segment information in a medium, such as a high density optical disk, and apparatus and methods for recording data up to and reproducing data from the medium using an allocation unit. of PAC including segment information, wherein at least one segment of a first PAC allocation unit can overlap with at least one segment of a second PAC allocation unit. Exemplary embodiments of the present invention provide a physical access control (PAC) allocation unit that includes segment information recorded therein, in order to improve data protection, improve data handling, improve playback compatibility, avoid the destruction of data and / or reduce necessary repetitive operations. Exemplary embodiments of the present invention provide a means, such as a high density optical disk, and apparatuses and methods for handling a PAC that includes segment information. In an exemplary embodiment, the present invention is directed to a recording medium having a data structure for handling a data area and a recording medium that includes at least one control allocation unit. Physical Access (PAC), at least one PAC allocation unit that includes information to handle recording to and / or playback from the recording medium, each PAC allocation unit includes segment information that identifies at least one segment in a user data area, where the segments of the same PAC allocation unit do not overlap. In an exemplary embodiment, the present invention is directed to a method for controlling access to a recording medium that includes identifying a first and second physical access control (PAC) allocation units, each including segment information that identifies segments. no overlaps in a user data area of the recording medium, wherein at least one segment in a first PAC allocation unit overlaps with at least one segment of a second PAC allocation unit and controls access to overlap areas of at least one segment in the first PAC allocation unit and the second PAC allocation unit depending on at least one overlap rule. In an exemplary mode, the present invention is directed to a method for recording on a recording medium that includes identifying a first and second physical access control (PAC) allocation unit, each including segment information that identifies non-overlapping segments in an area of user data of the recording medium, wherein at least one segment in the first PAC allocation unit overlaps with at least one segment of the second PAC allocation unit and recording to overlap areas of at least one segment in the first PAC allocation unit and at least one segment of the second PAC allocation unit if both PAC allocation units allow recording at least one segment. - In an exemplary embodiment, the present invention is directed to a method for reproducing from a recording medium including identifying a first and second physical access control (PAC) allocation units, each including segment information identifying non-segment segments. overlaps in a user data area of the recording medium, wherein at least one segment in the first PAC allocation unit overlaps with at least one segment of the second PAC allocation unit and reproduces from overlapping areas of at least one segment in the first PAC allocation unit and at least one segment of the second PAC allocation unit if both PAC allocation units allow reproduction from at least one segment. In an exemplary embodiment, the present invention is directed to an apparatus for recording to and / or reproducing from a recording medium having a data area including a controller for controlling recording or reproduction based on at least one unit of allocation Physical Access Control (PAC) including a first and second physical access control (PAC) allocation units, wherein, when at least one segment in the data area defined by the first PAC allocation unit overlaps with at least one segment in the data area defined by the second PAC allocation unit; recording up or playing from overlapping areas is not allowed if recording up to and / or playback from any of at least one segment of the first and second units of PAC assignment is not allowed and a recording head to record up or play from the recording medium. It will be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the exemplary embodiments of the invention and are incorporated in and constitute a part of this application, illustrate the exemplary embodiment (s) of the invention where: FIGURES IA and IB illustrate PAC areas on a high density optical disk according to an exemplary embodiment of the present invention; FIGURE 2 illustrates a zone INF02 and zone INF01 on a high density optical disk according to an exemplary embodiment of the present invention; FIGURE 3 illustrates a PAC recorded on a high density optical disc according to an exemplary embodiment of the present invention; FIGURE 4 illustrates a PAC in a high density optical disk according to an exemplary embodiment of the present invention; FIGURE 5 illustrates a field of "PAC Unknown Rules" according to an exemplary embodiment of the present invention; FIGURE 6 illustrates segments zones in a high density optical disk according to an exemplary embodiment of the present invention; FIGURE 7 illustrates a PAC zone on a high density optical disk according to an exemplary embodiment of the present invention; FIGURE 8 illustrates segments zones handled by a plurality of PAC zones on a high density optical disk according to an exemplary embodiment of the present invention; and FIGURE 9 illustrates an optical recording / reproducing apparatus in accordance with an exemplary embodiment of the present invention. Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts. In an exemplary embodiment, in addition to its ordinary and customary meaning, the term "physical access control (PAC)" may include additional information that is recorded on the disk to handle / control the recording and reproduction of data for an entire disk or a specific segment within a physical area of the disk. The term "physical access control (PAC)" may be referred to as "PAC", "PAC information", and / or "PAC control information" for simplicity. In addition, a zone within the disk in which PAC is recorded can be referred to as "PAC zone" and the PAC that is recorded in the PAC zone in allocation units can be referred to as a "PAC allocation unit" for simplicity. In addition, a PAC in accordance with exemplary embodiments of the present invention may include "unknown rule", which may restrict read / write data for the entire disk or a specific segment, for a disk unit having a specifically unknown PAC__ID. and includes a disk drive from a previous version (for example, an "inherited version"). A PAC that has an "unknown rule" applied to it can be referred to as an "unknown PAC". Similarly, a specific known PAC__ID recorded in the PAC can be referred to as a "known rule" and "PAC-specific information" that applies to the PAC can be referred to as a "known PAC". A structure in which the PAC is recorded in the PAC area, and the apparatus and method for recording and reproducing data using them will be described with reference to the accompanying drawings. FIGS. 1A or IB illustrate PAC areas on a high density optical disk according to an exemplary embodiment of the present invention.

With reference to FIGURE IA, the high density optical disc can be divided from an inner circumference to an outer circumference, in an entry zone, a data area, and an exit-zone. The entrance area can also be divided into an area INF02 and an area INF01 to record various types of information in them. The INF02 zone and an INF01 zone may include PAC (Physical Access Control) zones. For convenience, a PAC zone assigned to zone INF02 can be labeled as PAC2 zone and the PAC zone assigned to zone INF01 can be detected as a PACI zone. One of the PAC2 zone and the PACI zone may have an original PAC recorded in it and the other may have a backup zone to record an original PAC copy. If a writing direction is from the inner circumference to the outer circumference of the disc, it may be advantageous if the original PAC is recorded in the PACII zone and the backup PAC is recorded in the PACI area. FIGURE IB illustrates a diagram of a double layer disk structure having two recording layers including first recording layer (LO: Layer 0) and second recording layer (Ll: Layer 1), where each of the layers Recording includes an Entry / Exit Zone (also called an Inner Zone), a Data Area and an exterior 0 or 1 zone.

Each of the entrance area (zone 0 interior) and the exit zone (zone 1 interior) may include an area INF02 and a zone INF01 to record driving information of the disk, and the PAC zones can be located in the zone INF02 and / or the zone INFOl. Similar to a single layer disc, a PAC area assigned to zone INF02 can be labeled as PAC2 zone and PAC area assigned to INFO zone can be labeled as PACI zone. One of the PAC2 zone and the PACI zone may have an original PAC recorded in it and the other may have a backup zone to record a copy of the original PAC. If a writing direction is from the inner circumference to the outer circumference of the disc, it may be advantageous if the original PAC is recorded in the PACII area and the backup PAC is recorded in the PACI area. In the example shown in FIGURE IB, because the PACÍ and PAC2 zones are not only in the entrance area, but also in the exit area for the double layer disc, the double layer disc has a size of PAC twice as large as the single layer disc. The PAC zone can be provided to handle problems that may arise when an older version of a disk drive device can not detect functions on an aggregated disk that has functions compatible with a new version of a disk drive appliance. The PAC zone can handle compatibility problems using one or more "unknown rules". An "unknown rule" can be used to control predictable disk operations, for example, basic read, write control, etc., linear replacement of a defective zone, logical overwriting, etc. An area can also be provided on the disk, indicating where the "unknown rule" can be applied, for example, segments to define the entire disk or a certain portion of the disk, which is described later in greater detail. In areas of the disk managed by the "unknown rule", a DMA (Disk Management Area), a Spare Area, a User Data Area, and / or other similar areas may be provided. In this way, when defining a disk area, an older version disk drive device is able to access when using the "unknown rule", a new version of the disk reduces the operation. of unnecessary access to the older version's disk drive device. In addition, by defining an accessible area in a physical area of the disk for an older version disk drive device to access when using the PAC, a data area containing user data recorded therein can be protected more strongly and / or the unauthorized access (for example, computer intrusion) of the disk can be avoided or reduced. The zone INF02 and the zone INF01 having the PACII and I zones therein in the entrance zone can be revised in view of their recordable characteristics of the high density optical disk. In FIGURE 2 it illustrates the zone INF02 and the zone INF01 in a high density optical disk according to an exemplary embodiment of the present invention. With reference to FIGURE 2, for an example of BD-RE high density optical disc, the INF02 zone may have 256 allocation units including 32 PACI zone allocation units, 32 DMA zone 2 allocation units. (Area of Handling of Defects) for the handling of defects, 32 units of allocation of zone 2 of CD (Control Data) that has control information recorded in them, and / or 32 units of allocation of zone 3 of BZ ( Buffer zone) of a buffer zone. The zone INF01 may include 32 zone allocation units BZ2 of a buffer area, 32 units of disk unit area allocation which may be a disk unit area, for storing specific information for a disk unit, 32 DMA1 zone allocation units for handling defects, 32 CD1 zone allocation units for recording control information, and / or a BZ1-PACI area usable as the PAC zone. For a recordable high density optical disc (BD-R), the INF02 zone can have 256 allocation units that include a PACÍ zone, a DMA2 zone, a CD2 zone, and a BZ3 zone, each with 32 assignment units, and the INF01 zone includes a BZ2 zone, an area DMA1, a CD1 'zone and / or a BZ1-PAC1 zone, each with 32 allocation units, and 128 disk unit area allocation units. For a read-only high-density optical disk (BD-ROM), the INF02 zone can have 256 allocation units that include a PACI zone, a CD2 zone, and a BZ3 zone, each with 32 assignment units, and the INF01 zone 256 allocation units that include a CD1 zone, and / or a BZ1-PACI zone, each with 32 allocation units. The PAC zone of the exemplary embodiments of the present invention may be assigned to the zone INF02 and / or in the zone INF01 in the entrance zone in 32 allocation units each, according to rewritable characteristics of high density disk. In an example of a double-layer disc having two recording layers, the PAC zone can be designated, not only in the entry zone, but also in the exit zone, so that a PAC zone can have 64 units. of assignment. In a PAC area of 32 allocation units (or 64 allocation units), a PAC may have an allocation unit, for recording a plurality of valid PACs. There may also be a plurality of PACs of the size of a single allocation unit if desired. An exemplary structure in which a PAC is recorded as an allocation unit is described with reference to FIGURE 3. FIGURE 3 illustrates a diagram of a structure of a recorded PAC of a high density optical disk according to an exemplary embodiment of the present invention. With reference to FIGURE 3, a PAC of an allocation unit size (32 sectors) may include a specific header area and information area, specific to a particular disk unit (e.g., the optical disk unit) . The PAC header zone can have 384 bytes allocated to a first sector of the PAC, to record various types of PAC information, such as information about an "unknown PAC rule" and segments, and another area of the PAC zone can Having specific information for the (optical) disk drive can be referred to as "known rules" recorded therein. An exemplary structure of a PAC recorded in a prior structure is described with reference to FIGURE 4. For convenience, in the description particular fields of the PAC may require more detailed description which will refer to the drawings that illustrate the particular fields.

FIGURE 4 illustrates a diagram showing a structure of a PAC in a high density optical disk according to an exemplary embodiment of the present invention. With reference to FIGURE 4, the PAC may include a header portion (in one example, up to 384 bytes of the first frame) that can be applied to all the PACs and the area that has specific information for the disk unit recorded in the same An exemplary header portion may include 4 bytes of "PAC_ID", 4 bytes of "Unknown PAC Rules", 1 bytes of "All Disk Label", 1 byte of "Number of Segment ", and / or 32" segments Segment_0 ~ Segment_31 each with 8 bytes. The "PAC_ID" can provide the present status of PAC and identification codes, for example, if the "PAC-ID" is * 00 00 00 00h ', the "PAC__ID" can indicate that the present PAC is not used, and if the "PAC_ID" is FF FF FF FFh ', the "PAC_ID" may indicate that the present PAC zone is available for use again even if the PAC zone has been previously used. When recording the "PAC_ID" in predetermined bits, such as? 54 53 54 00h ', the "PAC_ID" is used as a code to determine whether the disk is one that the present disk drive can freely access. That is, if the present disk unit does not know the "PAC_ID" applied in this way, to determine that this is a case when the present disk unit can not understand the PAC present under a reason of bad correlation of version, or similar, 54 53 54 00h 'is used as a code that requires referring to the recorded information of the "Unknown PAC Rules" field. As described, the "PAC Unknown Rules" field can be used as a field that designates an operating range of a disk unit that may not recognize the present PAC, which will be further described with reference in FIGURE 5. FIGURE 5 illustrates a diagram showing a configuration of a "PAC Unknown Rules" field according to an exemplary embodiment of the present invention. With reference to FIGURE 5, a degree of control capability of the various areas on the disk can be allowed by the "Unknown PAC Rules". In this example, the "Area" column in FIGURE 5 represents the areas that can be controlled on the disk, the "Control" column represents control types, such as read / write, etc., and the "Number of" column. bits "represents a number of bits required for the control. Additional bits in the "Number of bits" column can represent double-layer disk cases with two recording / playback sides. The "Unknown PAC Rules" can be used to control a number of areas on a disk. For example, the "Unknown PAC Rules" may indicate recording control capability in the Disc Management Area (DMA) zones (which may or may not include a Disc Definition Structure (DDS) in the INF01 zone). , 2, 3 and / or 4, may indicate recording control capability in the Spare Areas in the Data Zone, may indicate recording control capability and / or playback in the Control Data Zone (CD) in the Zone INF01, 2, 3 and / or 4 may indicate capacity for recording control and / or reproduction in the User Data Area in the Data Zone and / or may indicate recording control and / or reproduction capacity in the " PAC allocation unit "in the INFOl zone and / or 2. In an example of the User Data Area, if a segment area which is a" special "area on the disk (which is described in the following) is defined, a User's Data Area can be used as a field to indicate recording control capability n and / or reproduction segment in the area, not necessarily the entire User Data Area. The write control capability can be applied only to the BD-RE and BD-R rewritable discs and the write control capability of a replacement area for a defective area can also be applied to the BD-RE and BD- rewritable discs R. As a result, several exemplary features of the present invention may depend on the rewritable characteristics of the high density (optical) disk. By using the prior art, the "Unknown PAC Rules" field allows the designation of an area that can be controlled on the disk for a disk drive with poor version correlation. In addition, the prior art can also be applied to control access to a particular physical area on a disk in a user option. With reference to Figure 4, the field "Count of PAC Update "in Figure 4, you can indicate a number of PAC updates, you can have" 0"written initially, and / or you can increment by one while rewriting the PAC, and in Figure 4 the field "All Disk Label" can be used as a field to indicate that the PAC can be applied to an entire area of the disk and the "Number of Segments" field is a field that can represent a number of segment areas to which The PAC can be applied In an exemplary mode, a maximum number of segments can be assigned to a PAC In an exemplary mode, a maximum number of 32 segments can be assigned to a PAC and the information on the assigned segments can be written in the "Segment_0" fields up to the "Segment_31", each including 8 byte.Each of the "Segment_0 ~ 31" fields can include the first physical sector number (PSN) and the last PSN of the assigned segment area recorded in the same. segments in greater detail in the following. FIGURE 6 illustrates segments zones in a high density optical disk according to an exemplary embodiment of the present invention. With reference to FIGURE 6, if required, there may be a maximum number (e.g., 32) of high density optical disc segment areas, to apply the PAC thereto. The maximum segment area number can start from "segment 0". Up to the maximum number of segments can be assigned starting from "segment 0" in ascending order for the management by a PAC, and even if there is a plurality of PACs, the total number of segment areas managed by the PACs should not exceed maximum number of segments. In one example, the positions of the segment areas can be identified by an optical disk drive by writing the first PSN, which can indicate a start position of the assigned segment area and the last PSN that can indicate the last position of the area of the assigned segment in the "Segment" fields. In an exemplary arrangement, none of the plurality of assigned segments needs to overlap and the start and end positions can be designated in limits of the allocation units. Thus, in the exemplary embodiments, the present invention may provide a plurality of PACs, to handle a number (e.g., 32) of segment areas, which are described in greater detail in the following. FIGURE 7 illustrates a PAC zone on a high density optical disk according to one embodiment of the present invention. With reference to FIGURE 7, a plurality of valid PACs, each with a common allocation unit size, may be written in a PAC area (eg, the PAC zone of INF02 or INFOl) of 32 allocation units. As described above, a valid PAC can be defined as a zone containing the various types of PAC information and a maximum number (for example, 32 or 64 in the case of a double layer disk) of valid PACs can be provided. on a disk, each with an allocation unit size that can be assigned to a PAC zone. As described above, the valid PAC may have a PAC_ID (eg, PAC_ID = 54 53 54 OOh) pre-selected according to a disk drive version of the optical disk having the PAC recorded therein, and the remainder of the PAC zone may have a PAC of FF FF FF FFh recorded therein if the PAC_ID is 00 00 00 OOh, and the PAC area not recorded is still in a PAC area not recorded. In a modality, if a defect of the PAC area of the PAC that is going to be written in it, the PAC can be written in a following area in a defective area. The defect may be caused by damage to, or contamination of, a disc surface, and when the defect occurs in the area in which the PAC is to be described, the PAC information may be written in an area following the defective area. An example of a plurality of valid PACs that can be assigned to a PAC zone that has various types of information about controllable areas of the disk, are described by reference in FIGURE 8. FIGURE 8 illustrates segments zones handled by a plurality of PAC zones on a disk (e.g., a high density optical disk) in accordance with an exemplary embodiment of the present invention. With reference to FIGURE 8, the areas of controllable segments can be designated on the disk by using a plurality of PACs. That is, it is possible to control the areas of a segment 0 Seg # 0, and segment 1 Seg # through PAC # 0 on the disk, segment areas 0 Seg # 0, and Segment 1 Seg # l on the disk through of PAC # 1, and segment area 0 Seg # 0 on the disk through PAC # 2.

In this example, although none of the segment areas managed by a PAC overlap, segment areas managed by different PACs may overlap as shown in FIGURE 8. In an example where segment areas handled by different PACs overlap among themselves, there may be cases where the description of the control by the PACs over the overlapped areas contradict each other, which is also described with reference to FIGURE 8 '. With reference to FIGURE 8, segment area # 0 driven by PAC # 0 and segment area # 0 handled by PAC # 1 overlap to form a first overlap area, and segment area # l handled by PAC # 0 and segment area # 0 driven by PAC # 2 overlap to form a second overlap area. As shown, there may be an overlap area of segments handled by different PACs and there may be a contradiction to control overlapping segment areas, for example, segment control # 0 through PAC # 1 may be read only while the segment control # 0 by PAC # 0 can be read / written. In accordance with an exemplary embodiment of the present invention, when the segments handled with different PACs overlap, several different methods can be applied to control the overlapped area. In an exemplary mode, an OR function can be applied, where if a PAC does not allow (ie, excludes) a certain control operation, the operation is not allowed, regardless of whether the other PAC allows the operation or not. In other words, if both PAC (or all) show a certain control operation, the certain control operation is allowed for the overlapped area. For example, in the previous illustrative case, because the control of segment # 0 driven by PAC # 0 is write-read and the control of segment # 0 driven by PAC # 1 is read-only, control of the areas of overlapping segments can only be read. In other words, if writing and reading are allowed for segment # 0 driven by PAC # 0 and writing is only allowed but only reading is allowed for segment # 0 by PAC # 1, writing is not allowed only reading is allowed for areas of overlapping segments. Table 1 illustrates the previous example.

Table 1 In another exemplary mode, an AND function can be applied, where, if a PAC shows a certain control operation, the operation is allowed, regardless of whether the other PAC allows the operation or not. For example, in another illustrative case, if the control of segment # 0 driven by PAC # 0 allows writing and reading and control of segment # 0 driven by read-only PAC # 1, the control of the overlapping segment area is read and writing. Table 2 illustrates the previous example.

TABLE 2 In other exemplary embodiments, other solutions of Boolean operation (or combinations thereof) could also be implemented as would be apparent in view of the discussion of the exemplary embodiments of the present invention set forth in the foregoing. In another embodiment of the present invention, in an illustrative case where segment areas handled by different PACs overlap each other, another method may be used, in which control as defined by a newly designated PAC is allowed. In an illustrative example, if PAC # 1 is a PAC designated more recently in time than PAC # 0, and PAC # 2 is a PAC more recently in time than PAC # 1, if the segment areas handled by the PACs overlap, Newly designated PAC (or more recently) can control, which will be described with reference to FIGURE 8. In the example in FIGURE 8, if segment area # 0 driven by PAC # 0, and segment area # 0 handled by the area of PAC # 1 overlap and the control by PAC # 0 is read only and the control of PAC # 1 is of writing and reading, the control of the overlapped area is of writing and reading, which is defined by PAC # 1, the newest PAC. This control method can be called "New PAC Rule" different from the OR function and the AND function in the previous exemplary modes. In other exemplary modalities, the control may be defined in accordance with an existing or older PAC (or combinations thereof), not the newly designated PAC as may be apparent in view of the discussion of exemplary embodiments of the present invention set forth in the foregoing. FIGURE 9 illustrates a block diagram of an optical recording / reprodu apparatus according to an exemplary embodiment of the present invention. With reference to FIGURE 9, the recording / playback optical apparatus may include a recording / playback device 10 for performing recording / playback on the optical disc and a computer, or controller 20 for controlling the recording / playback device 10. In an exemplary embodiment, the recording / reprodu device 10 can act as the "optical disc unit" discussed in the foregoing together with many exemplary embodiments of the present invention. In an exemplary embodiment, the computer 20 gives a write or playback instruction for writing or playing from a particular area of optical disc for the recording / playback device 10, and the recording / playback device 10 performs recording / playback up to / from the particular area in response to the instruction of the computer 20. The recording / reprodu device 10 may further include an interface part 12 for performing communication, such as exchange of data and instructions with the computer 20, a backup part 11 to write / read data to / from the optical disk directly, or data processor 13 to receive a signal from the backup part 11 and recover a desired signal value or modulate a signal to be written to a signal capable of being written to the disk optical, a servo part 14 for controlling the recording head part 11 to read an optical disc signal precisely or for a signal on the optical disc precisely, a memory 15 for the temporary storage of various types of information including handling information and data, and a microcomputer 16 for controlling various parts of the recording / reprodu device 10. An exemplary method for recording a PAC on a high density recordable optical disc using the exemplary recording / reprodu optical apparatus will be described in the following. By inserting the optical disc into the recording / reprodu apparatus, operating information can be read from the optical disc and stored in the memory 15 of recording / reprodu device 10, for use at a time of recording / playback of the optical disc. In this state, if the user wishes to write to a particular area of the optical disc, the computer 20, taking this as a write instruction, provides information in a desired write position for the recording / playback device 10, together with data that they're going to-write. The microcomputer 16 in the recording / reprodu device 10 can receive the write instruction, determine whether the area of the optical disk that the computer 20 wants to write is a defective area or is not from the handling information stored in the memory 15, and / or performing data writing according to the writing instruction of the computer 20 in an area which is not a defective area. If it is determined that writing to an entire disc or a particular area of the disc includes new features with which a previous version of the recording / playback device is not provided, it leads to the previous version of the recording / playback device not being detected, or if it is intended to restrict functions, such as writing or reproduction to / from a particular area in accordance with the restriction established by the user, the microcomputer 16 of the recording / reprodu device 10 may describe control information of the area in the PAC area. on the disk as an "Unknown PAC Rule". The microcomputer 16 of the recording / playback device 10 can also write PAC information, such as PAC_ID for a written state, and segment information which is control information in the particular area of the disk. The PAC information can be written in a plurality of valid PACs in the PACI zone and the INFOl area as required in an allocation unit size and a PAC copy recorded in the PACI zone can be written in the PAC2 zone of the zone INF02 as backup. The microcomputer 16 can provide position information of the area in which the data is written, or the PAC area, and the data for the servo 14 and the data processor 13, so that the writing is terminated at a desired position in the optical disk through the recording head part 11. Additionally, a method for recording / reproducing the high density optical disc having PAC information written by the above exemplary method will be described in the following. With the insertion of an optical disc into the optical recording / reproducing apparatus, the operating information can be read from the optical disc and stored in the memory 15 of the recording and reproducing device 10, for use at the time of recording and reproducing the Optical disc. The information in the memory 10 may include position information of several zones included in the PAC area on the disk. Particularly, valid PAC positions in the PAC area can be known from the disk definition structure (DDS) information. After the valid PAC positions are known, a PAC_ID field of the PAC can be examined, to verify if the PAC_ID is an identifiable PAC_ID. If the PAC_ID is identifiable, the method determines that a recording and playback device having written data on the disc has a version identical to a version of the present recording and playback device or there are no separate writing / reproducing restrictions, and the Recording / playback is performed according to the instruction of the computer 20. If the PAC_ID is not identifiable, the method determines that the recording and playback device that has written the data on the disk has a different version of the device version present. recording and playback, and recording / playback is performed in accordance with the instruction of the computer with reference to the recording / playback restriction areas on the disc that include the "Unknown PAC Rule" and the "segment". In a case where the segment areas handled by different PACs overlap, the control information for the recording and / or reproduction of the overlapped area is determined based on the control allowed by the different PACs using one or more of the exemplary rules established in the above. The microcomputer 16 can then provide the location and data information according to the instruction of the computer for the servo 14 and the data processor 13, so that the recording / playback is terminated at a desired location on the optical disc through the recording head part 11. As described above, the methods and apparatus for recording and reproducing on a rewritable high density optical disc according to described embodiments of the present invention may have one or more of the following advantages. First, the definition of an accessible area of a disk of a different version disk drive when using PAC could allow stronger protection of a data area having user data recorded therein, for example, to avoid or reduce the unauthorized access (for example, computer intrusion.) Second, effective recording data up to and / or playback of data from a high density optical disk is enhanced by using a PAC that handles the entire data area or a part Applicability of the disc data area It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention described in the foregoing without departing from the spirit or scope of the invention., it is intended that the present invention cover the modifications and variations of this invention with the proviso that they fall within the scope of the appended claims and their equivalents.

Claims (34)

1. CLAIMS 1. A recording medium having a data structure for handling a data area of a recording medium, characterized in that it comprises: at least one physical access control allocation unit (PAC), at least one unit of PAC allocation including information to handle recording up to and / or playback from the recording medium, each PAC allocation unit includes segment information that identifies at least one segment in a user data area, where the segments of a The same PAC allocation unit does not overlap. The recording medium according to claim 1, characterized in that at least one segment in a first PAC allocation unit can overlap with a segment of a second PAC allocation unit. The recording medium according to claim 2, characterized in that the access control of at least one overlapping segment in the first PAC allocation unit and at least one overlapping segment of the second PAC allocation unit is according to at least one overlap rule. 4. The recording medium according to claim 3, characterized in that at least one overlap rule is an "OR" rule. The recording medium according to claim 4, characterized in that the "OR" rule requires the first PAC allocation unit and the second PAC allocation unit to allow an operation so that the operation is allowed in the overlap or so less one segment in the first PAC allocation unit and the overlap in at least one segment of the second PAC allocation unit. 6. The recording medium according to claim 4, characterized in that the "OR" rule indicates that if any of the first PAC allocation unit and the second PAC allocation unit does not allow access to at least one segment of the PAC allocation unit. the first and second PAC allocation units, the overlap areas of at least one segment are not allowed to access. The recording medium according to claim 5, characterized in that the operation is a recording operation. The recording medium according to claim 5, characterized in that the operation is a reproduction operation. 9. The recording medium according to claim 3, characterized in that at least one overlap rule is a more recent PAC rule. 10. The recording medium according to claim 9, characterized in that the most recent PAC rule requires a more recent definition of the first PAC allocation unit and the second PAC allocation unit to allow an operation so that the operation is allowed in the overlap of at least one segment in the first PAC allocation unit and the overlap of at least one segment of the second PAC allocation unit. The recording medium according to claim 10, characterized in that the operation is a recording operation. 12. The recording medium according to claim 10, characterized in that the operation is a reproduction operation. The recording medium according to claim 1, characterized in that at least one PAC allocation unit is unknown for an apparatus that attempts to record up to or reproduce from the recording medium. The recording medium according to claim 13, characterized in that at least one unknown PAC allocation unit includes unknown PAC rules, and is processed by the apparatus in accordance with the unknown rules of PAC 15. The means of recording according to claim 14, characterized in that the unknown PAC rules control access to all segments of the corresponding PAC allocation unit. 16. The recording medium according to claim 1, characterized in that the recording medium is a rewritable recording medium. The recording medium according to claim 1, characterized in that the recording medium is a recordable recording medium. 18. The recording medium according to claim 1, characterized in that the recording medium is a read-only recording medium. 19. A method for controlling access to a recording medium, characterized in that it comprises: identifying a first and second physical access control (PAC) allocation unit, each including segment information that identifies non-overlapping segments in an area of user data of the recording medium, wherein at least one segment in a first PAC allocation unit overlaps with at least one segment of a second PAC allocation unit; and controlling access to the overlap areas of at least one segment in the first PAC allocation unit and the second PAC allocation unit depending on at least one overlap rule. 20. The method of compliance with the claim 19, characterized in that at least one overlap rule is an "OR" rule. 21. The method according to the claim 20, characterized in that the "OR" rule requires that the first PAC allocation unit and the second PAC allocation unit allow an operation so that the operation is allowed in the overlap of at least one segment in the first PAC allocation unit and the overlap of at least one segment in the second PAC allocation unit. 22. The method of compliance with the claim 20, characterized in that the "OR" rule indicates that any of the first PAC allocation unit and the second PAC allocation unit do not allow access to at least one segment of the first and second PAC allocation units; overlapping areas of at least one segment are not allowed to access. 23. The method according to the claim 21, characterized in that the operation is a recording operation. 24. The method according to claim 21, characterized in that the operation is a reproduction operation. 25. The method according to claim 19, characterized in that at least one overlap rule is a more recent PAC rule. The method according to claim 25, characterized in that the most recent PAC rule requires a more recently defined one of the first PAC allocation unit and the second PAC allocation unit to allow an operation so that the operation is allowed in the overlap of at least one segment in the first PAC allocation unit and the overlap in at least one segment of the second PAC allocation unit. 27. The method according to claim 26, characterized in that the operation is a recording operation. 28. The method of compliance with the claim 26, characterized in that the operation is a reproduction operation. The method according to claim 19, characterized in that at least one of the first and second PAC allocation units is unknown for an apparatus that attempts to record up to or reproduce from the recording medium. 30. The method according to claim 29, characterized in that at least one unknown PAC allocation unit includes unknown PAC rules, and is processed by the apparatus in accordance with the unknown PAC rules. 31. The method according to claim 30, characterized in that the unknown PAC rules control access to all segments of the corresponding PAC allocation unit. 32. A method for recording in a recording medium, characterized in that it comprises: identifying a first and second physical access control (PAC) allocation units, each one including segment information that identifies non-overlapping segments in a data area of the recording medium user, wherein at least one segment in the first PAC allocation unit overlaps with at least one segment of the second PAC allocation unit; and recording to overlap areas of at least one segment of the first PAC allocation unit and at least one segment of the second PAC allocation unit if both PAC allocation units allow recording of at least one segment. 33. A method for reproducing from a recording medium, characterized in that it comprises: identifying a first and second physical access control (PAC) allocation unit, each including segment information that identifies non-overlapping segments in a data area of user of the recording medium, wherein at least one segment in the first PAC allocation unit overlaps with at least one segment of the second PAC allocation unit; and reproducing of the overlap areas of at least one segment in the first PAC allocation unit and at least one segment of the second PAC allocation unit if both PAC allocation units allow reproduction from at least one segment . 34. An apparatus for recording up to and / or playing from a recording medium having a data area, characterized in that it comprises: a controller for controlling the recording or reproduction based on at least one physical access control (PAC) assignment unit that includes a first and second physical access control (PAC) allocation unit, where At least one segment in the data area defined by the first PAC allocation unit overlaps with at least one segment 'of the data area defined by the second PAC allocation unit.; recording up to or playing from overlapping areas is not allowed if recording up or playing from any of at least one segment of the first and second PAC mapping unit is not allowed, and a recording head to record up or play from the recording medium.