RU2385506C2 - Recording medium with recorded segment information, and also device and method of formation, recording and reproduction of such recording medium - Google Patents

Abstract

FIELD: information technologies. ^ SUBSTANCE: recording medium contains zones, where data is recorded, and area of access control. Area of access control provides information, which specifies number of zones in the area of data, information, which makes it possible for the device to execute access to these zones, and information that permits or prohibits access to these zones. ^ EFFECT: provides for compatibility in data control and possibility of their reproduction. ^ 31 cl, 12 dwg

Description

FIELD OF THE INVENTION

The present invention relates to managing physical access control (PAC, UVD) and recording data, media containing PAC and recording data (e.g., high density optical discs such as a Blu-ray disc), as well as a device and methods for recording and / or reproducing data on and from such a medium.

State of the art

Media, such as optical discs, can be used to record large amounts of data. In addition to existing optical discs, new high-density optical media (HD-DVDs) are being developed, such as a Blu-ray disc (hereinafter referred to as “BD”), which can increase the recording and / or storage capacity of high-definition video and / or audio data.

The BD also includes a rewritable Blu-ray disc (BD-RE), a write-once Blu-ray disc (BD-WO), and a read-only Blu-ray disc (BD-ROM).

Currently, one of the problems of existing systems is the potential incompatibility between drives of different versions, for example, a drive of a previous version with a previous set of functionality may encounter problems when interacting with a medium that interacted with a drive that includes at least one functional an opportunity from a subsequent set of functionality.

SUMMARY OF THE INVENTION

Exemplary embodiments of the present invention provide a PAC including segment information on a medium, such as a high density optical disc, as well as a device and methods for recording data on such medium and reproducing data therefrom using PAC, including segment information.

Exemplary embodiments of the present invention provide physical access control (PAC) information including segment information recorded therein to improve data protection, improve data management, improve playback compatibility, eliminate data corruption and / or reduce unnecessary, repeated operations.

Exemplary embodiments of the present invention provide a medium, such as a high density optical disc, as well as an apparatus and methods for controlling a PAC including segment information.

In an exemplary embodiment, the present invention is directed to a recording medium having a data structure for managing a data area of a recording medium including at least one physical access control (PAC) cluster, which at least one PAC cluster includes information designed to control recording on a recording medium and / or playback from a recording medium, each PAC cluster includes a PAC header common to each PAC cluster and a region of PAC-specific information This includes information specific to each PAC cluster, the PAC header including segment number information identifying the number of segments and a segment list area identifying each of the segments in the user data area of the recording medium.

In an exemplary embodiment, the present invention is directed to a recording or reproducing method with respect to a recording medium, including recording or reproducing at least one physical access control (PAC) cluster, the at least one PAC cluster including information for control recording on the recording medium and / or playback from the recording medium, each PAC cluster includes information about the number of segments and a list of segment inputs, and if the PAC cluster represents fight unknown cluster and information about the number of segments identifies at least one segment in a user data area of the recording medium, the recording in the user data area and / or reproducing therefrom for the at least one segment.

In an exemplary embodiment, the present invention is directed to a method for reproducing from a recording medium, comprising reproducing from a user data area recorded on a recording medium based on at least one physical access control (PAC) cluster, each of which is at least one the PAC cluster includes the number of segments in the user data area, wherein if said number of segments is zero, said reproduction is performed for the entire region and user data, otherwise said reproduction is performed for each of said number of segments.

In an exemplary embodiment, the present invention is directed to a device for recording onto a recording medium and / or playback from a recording medium, including a master device for actuating an optical recording device for recording data on a recording medium or reproducing data from the medium recording, and a controller for controlling a driver for recording or reproducing data based on at least one physical access control zone a (PAC) including at least one physical access control (PAC) cluster, wherein this at least one PAC cluster includes information for managing recording on and / or playback from the recording medium, each cluster The PAC includes information about the number of segments and a list of segment inputs, the controller writing to and / or playing back from the user data area for said at least one segment if the PAC cluster is unknown and inf rmatsiya identifies the number of segments at least one segment in a user data area of the recording medium.

In an exemplary embodiment, the present invention is directed to a device for reproducing from a recording medium, including a driver for driving an optical recording device for reproducing data from a recording medium, and a controller for controlling the driver for reproducing data on the basis of at least one physical access control zone (PAC) including at least one physical access control cluster (PAC), wherein that at least one PAC cluster includes information for controlling recording on the recording medium and / or playback from the recording medium, wherein each PAC cluster includes information on the number of segments and a list of segment inputs, the controller performs playback from the user data area recorded on a recording medium based on said at least one physical access control (PAC) cluster, wherein each of said at least one PAC cluster includes the number of segments in the user data area, the controller reproduces the entire user data area if the said number of segments indicates zero, and reproduces each of the mentioned number of segments if this number of segments does not indicate zero.

It should be understood that both the foregoing general description and the following detailed description of the present invention are an example and an explanation, and are intended to provide an additional explanation of the invention as claimed.

List of drawings

The accompanying drawings, which are included to further illustrate exemplary embodiments of the invention and are provided so that they form part of this application, illustrate an exemplary embodiment (s) of the invention, in which

1 is a diagram illustrating PAC zones on a high density optical disc, in accordance with an exemplary embodiment of the present invention;

2 is a diagram showing configurations of the INFO2 zone and the INFO1 zone on a high density optical disc in accordance with an exemplary embodiment of the present invention;

3 shows a PAC recorded on a high density optical disc in accordance with an exemplary embodiment of the present invention;

4 shows a PAC on a high density optical disc in accordance with an exemplary embodiment of the present invention;

figure 5 shows the field "Unknown PAC rules" in accordance with an exemplary embodiment of the present invention;

FIG. 6 shows segment zones on a high density optical disc in accordance with an exemplary embodiment of the present invention;

7 illustrates a PAC on a high density optical disc in accordance with another exemplary embodiment of the present invention;

on Fig presents PAC on a high density optical disc in accordance with another exemplary embodiment of the present invention;

FIG. 9 shows a PAC on a high density optical disc in accordance with yet another exemplary embodiment of the present invention;

10 shows control information regarding a region-segment on a high density optical disc in accordance with an exemplary embodiment of the present invention;

11 shows control information regarding a region-segment on a high density optical disc in accordance with another exemplary embodiment of the present invention;

12 illustrates a block diagram of an optical recording and reproducing apparatus in accordance with an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The following are exemplary embodiments of the present invention shown in the accompanying drawings. Wherever possible, the same reference numerals are used throughout the drawings to refer to the same or similar parts.

1 shows PAC zones of a high density optical disc in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 1, a high-density optical disc can be divided, starting from the inner circle to the outer circle, into an input zone, a data zone, and a lead-out zone. The introductory zone can be further divided into the INFO2 zone and the INFO1 zone, intended for recording various kinds of information in them. The INFO2 zone and the INFO1 zone may include PAC (physical access control) zones.

For convenience, the PAC assigned to INFO2 is designated as PAC2, and the PAC assigned to INFO1 is designated as PAC1. In one of the PAC2 zones and PAC1 zone, the original PAC can be recorded, and the other of these zones can be a backup zone in which a copy of the original PAC is recorded. If you choose the direction of recording on the disc from the inner circle to the outer circle, it may be preferable that the original PAC was recorded in the PAC2 zone, and a backup copy of the PAC was recorded in the PAC1 zone. A PAC zone can be provided to solve problems that may arise when an older version of a drive device cannot detect functions on a disk to which new functions compatible with a newer version of a drive device are added. The PAC zone allows you to solve compatibility problems using one or more "unknown rules".

An “unknown rule” can be used to control predictable disk operations, such as basic read, write, etc. control, linear defective area replacement, logical overwrite, etc. Also, a region may be provided on the disk showing where the "Unknown rule" applies, for example, segments for specifying the entire disk or a specific section of the disk, which is described in more detail below.

Thus, by defining a region on the disk, it is possible to access a new version of the disk for an older version of the drive device using the "Unknown Rule", reducing unnecessary access operations of the older version of the drive device.

In addition, by determining the available area in the physical area of the disk for an older version of the drive device to provide access using the PAC, the data area in which user data is recorded can be more securely protected and / or unauthorized access can be prevented (e.g. , hacking) a disk or its probability is reduced.

The INFO2 zones and the INFO1 zone, in which the PAC2 and PAC1 zones located in the lead-in zone are recorded, can be considered in terms of the rewritability characteristics of a high density optical disc.

2 is a diagram showing configurations of the INFO2 zone and the INFO1 zone on a high density optical disc, in accordance with an exemplary embodiment of the present invention.

Figure 2 shows an example of a high-density optical disc BD-RE on which the INFO2 zone can have 256 clusters, including 32 PAC2 zone clusters, 32 DMA zone clusters (defect management area) 2, intended for defect management, 32 CD zone clusters ( control data) 2, in which control information is recorded, and / or 32 clusters of zone BZ (buffer zone) 3, which is a buffer zone.

Zone INFO1 may include 32 clusters of zone BZ2 from the buffer region, 32 clusters of the zone of the drive, which may be a region of the drive in which information specific to the drive is stored, 32 clusters of zone DMA1 for defect management, 32 clusters of zone CD1 intended for recording control information and / or a BZ1-PAC1 zone used as a PAC zone.

For a write-once high-density optical disc (BD-R), the INFO2 zone can have 256 clusters, including the PAC2 zone, the DMA2 zone, the CD2 zone, and the BZ3 zone, each with 32 clusters, and the INFO1 zone includes the BZ2 zone, DMA1 zone , zone CD1 and / or zone BZ1-PAC1, each with 32 clusters, as well as 128 clusters for the drive area.

For a read-only high-density optical disc (BD-ROM), the INFO2 zone can have 256 clusters, including the PAC2 zone, the CD2 zone, and the BZ3 zone, each with 32 clusters, and 256 INFO1 zone clusters, including the CD1 zone and / or zone BZ1-PAC1, each of 32 clusters.

PAC zones in exemplary embodiments of the present invention can be assigned to the INFO2 zone and / or INFO1 zone in the lead-in zone, 32 clusters each, in accordance with the rewritability characteristics of the high density optical disc.

In a 32 cluster cluster PAC, one PAC can correspond to one cluster to record multiple valid PACs. An example of a structure in which one PAC is recorded as one cluster is described with reference to FIG.

Figure 3 presents the PAC recorded on a high density optical disc, in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 3, one PAC of one cluster size (32 sectors) may include a header area and a specific information area that is specific to a particular drive (eg, optical drive).

The PAC header area may have 384 bytes allocated for the first PAC sector and designed to record various kinds of PAC information, such as information about the “unknown PAC rule” and segments, and information specific to the (optical) can be written to another area of the PAC zone drive, which can be called "known rules."

An example of a PAC structure recorded in the above structure will be described with reference to FIG. For convenience, when describing specific PAC fields for which a more detailed description is required, reference is made to the drawings that illustrate these specific fields.

FIG. 4 illustrates a PAC on a high density optical disc in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 4, the PAC may include a header portion applicable to all PACs and an area in which information specific to a particular drive is recorded.

An example header portion may include 4 bytes of the PAC identifier "PAC_ID", 4 bytes of "Unknown PAC rules", 1 byte of the "Total disk flag", 1 byte of the "Number of segments" and / or 32 segments "segments Segment_0 ~ Segment_31", each 8 bytes in size.

"PAC_ID" can provide the current PAC status and identification codes, for example, if "PAC_ID" contains bits "00 00 00 00", "PAC_ID" indicates that the current PAC is not used, if "PAC_ID" contains bits "FF FF FF FE" , "PAC_ID" indicates that the current PAC is not available for use due to defects or the like, and if "PAC_ID" contains the bits "FF FF FF FF", "PAC_ID" indicates that the current PAC is again available for use, even if the PAC has been used before.

By writing "PAC_ID" in the form of predefined bits, such as bits "54 53 54 00", "PAC_ID" can be used as a code to determine if a drive is a drive to which an existing drive can have free access. Thus, if the existing drive does not recognize the applicable "PAC_ID", (perhaps there is a case where the existing drive cannot recognize the current PAC due to version mismatch or a similar problem), bits "54 53 54 00" can be used as code for access to the information recorded in the "Unknown PAC rules" field.

As described above, the “Unknown PAC Rules” field can be used as a field that denotes the performance range of the drive that the current PAC cannot recognize, which will be described below with reference to FIG.

Figure 5 shows the "Unknown PAC Rules" field in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 5, the degree of controllability of various areas on the disk can be ensured through the “Unknown PAC Rules” field. In this example, the “Region” column in FIG. 5 represents the monitored areas on the disk, the “Monitor” column represents the types of monitoring, such as read / write, etc., and the “Number of bits” column represents the number of bits required for monitoring.

Additional bits in the “Number of bits” column may represent cases of a dual layer disc with two sides of recording / reproducing.

For example, in the “Region” column of FIG. 5, the read / write controllability of the PAC zone can be represented by the “PAC Zone 1, 2” fields, and the write controllability of the defect management zone can be represented by the “DMA Zone 1, 2” fields. The controllability of the record of the replacement area for the defective area can be represented by the field "Clusters", the controllability of reading / writing of the data zone can be represented by the field "Data zone", and the controllability of logical rewriting can be represented by the field "Logical rewriting".

Record controllability is applicable only for rewritable BD-RE and BD-R discs, and write controllability of a replacement area for a defective area is also applicable for rewritable BD-RE and BD-R discs. As a result, various illustrative features of the present invention may depend on the rewritability characteristics of the (optical) high density disc.

Using the methodology described above, the "Unknown PAC Rules" field provides the designation of the controlled area on the disk for the drive with version mismatch. In addition, the technique described above may also be applicable to control access to a specific physical area on the disk of the user's choice.

Let us again consider FIG. 4, in which the “Flag of the entire disk” field can be used as a field to indicate that the PAC is applicable to the entire area on the disk, and the “Number of segments” field is a field that can be the number of segment regions, for which PAC is applicable.

In an exemplary embodiment, a maximum number of segments may be allocated for one PAC.

In an exemplary embodiment, a maximum number of 32 segments can be allocated for one PAC, and information about the selected segments can be written in the "Segment_0" - "Segment_31" fields, each of which includes 8 bytes. Each of the fields "Segment_0 ~ 31" may include the first number of the physical sector (PSN, NPS) recorded in it and the last PSN of the selected region-segment.

Segments are described in more detail below. Figure 6 shows the segment zones on a high density optical disc in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 6, if necessary, a maximum number (for example, 32) of segment regions on a high density optical disc can be provided for applying PAC to them. The maximum number of segment regions can start from "Segment 0".

In this example, the positions of the segment regions can be identified by the optical drive by recording the first PSN, which can indicate the initial position of the selected segment region, and the last PSN, which can indicate the last position of the selected segment region in the "Segment" fields in zones PAC2 and PAC1 .

In an exemplary arrangement, overlapping any of the plurality of selected segments is not necessary, and the start and end positions may be indicated at the boundaries of the clusters.

Thus, in exemplary embodiments, the present invention can provide multiple PACs for controlling a number (for example, 32) of segment regions, which is described in more detail below.

7 shows a PAC zone of a high density optical disc in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 7, a plurality of valid PACs, each of which has a common cluster size, can be recorded in one PAC zone (for example, in a PAC zone of INFO2 or INFO1) of 32 cluster sizes.

In an exemplary embodiment, the header portion may include 4 bytes “PAC_ID”, 4 bytes “Unknown PAC rules”, 1 byte “PAC header labels”, 1 byte “Total disk flag”, 1 byte “Number of specified segments” and / or 32 "segments Segment_0 ~ Segment_31", each of which has a size, for example 8 bytes.

The PAC Header Label field can be used to connect clusters, each of which has a specific PAC containing drive-specific information. The PAC Header Label field may increment one by one starting from (01) whenever a new PAC is added.

In this example, if the bits are FF, this means that a new PAC has not been added, and if the bits are 00, this means that the "PAC Header Label" is not used.

FIG. 8 illustrates a PAC on a high density optical disc in accordance with another exemplary embodiment of the present invention.

As shown in FIG. 8, a PAC in accordance with another exemplary embodiment of the present invention may include a header portion and a region having specific information that is specific to the drive, and the header portion may further include 4 bytes of “PAC_ID”, 4 bytes of “Unknown PAC Rules”, 1 byte of “PAC Header Labels”, 1 byte of “Flag of the entire disk”, 2 bytes of “Byte Address for a set of segments”, 2 bytes of “Number of segments specified in a set” and / or the Reserved field for segment ", which is reserved for 32 segments, each of 8 bytes.

A PAC structure in accordance with another exemplary embodiment of the present invention may include a byte address for a set of segments. That is, for areas reserved for segments, the number of specified segment areas can be indicated in the "Number of segments defined in set (N_Segs)" field, and the byte address of the starting position can be indicated in the "Byte address for set of segments" field. In this example, it may be preferable to use predetermined segments continuously.

FIG. 9 shows a PAC on a high density optical disc in accordance with another exemplary embodiment of the present invention.

As shown in FIG. 9, a PAC according to another exemplary embodiment of the present invention may include a header portion and an area having specific information that is specific to the drive, and the header portion may further include 4 bytes of “PAC_ID”, 4 bytes of “Unknown PAC Rules”, 1 byte of “PAC Header Labels”, 1 byte of “Flag of the entire disk”, 2 bytes of “Byte Address for the main set of segments”, 2 bytes for “Number of segments specified in the main set (N_M_Segs)” , 2 bytes "byte address for additional Tel'nykh set of segments "2 bytes" Number of Segments defined in the additional set (N_A_Segs) "and / or the" unused portion in a specific PAC "in the area-specific information that is specific to the drive.

The PAC structure in accordance with another exemplary embodiment of the present invention may include a basic set of segments and an additional set of segments. Segment areas can be additionally selected for use in the case where it is intended to allocate more segment areas than 32 segment areas.

In this example, a certain number of main segments is recorded, specified by the "Number of segments specified in the set (N_M_Segs)" field, and its initial position can be written in the "Byte address for the main set of segments" field. Thus, the information recorded in the "Byte address for the main set of segments" can be used as a pointer to a given area of the main segments.

The specified additional number of segments can be recorded using the field "Number of segments specified in the additional set (N_A_Segs)", and its initial position can be written in the "Byte address for the additional set of segments" field.

In this example, an area of additional segments can be provided with an unused portion in a specific PAC in one PAC zone of 1 cluster size and can be allocated to N_A_Segs.

In the above PAC structure example, it is possible to manage additional segment areas, in addition to 32 segment areas.

Exemplary embodiments of the present invention are directed to recording control information regarding an entire disc area, an entire selected segment area, or selected corresponding segment areas, using the dedicated PAC as described below.

10 illustrates control information regarding a segment area on a high density optical disc in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 10, a dedicated segment can be represented by an 8-byte input, in which the first physical sector number of the segment-region can be 32 bytes in size and the last physical sector number can be 32 bytes in size. Therefore, the optical drive can obtain position information regarding the selected region-segment using segment information from the recorded PAC.

In this example, as described above, the number of segment areas (one or more) can be controlled using one or more PACs. If at least one segment region is selected, the optical drive can determine this number of selected segment regions through the "Number of segments" field and determine the controllability, for example, of reading, writing and / or other similar operations, relative to this region through the "Zone" field "Unknown PAC Rules" data.

If no segments are selected and the “Whole disk flag” field is written, indicating that the PAC is applicable to the entire disk area, as described above, although the “Data Zone” field of “Unknown PAC Rules” is used, a field indicating the ability to access the data area on an optical disk, such as reading, writing, and / or other similar operations, if a segment region is selected, for recording in the "Number of segments" field, the "Data zone" field of "Unknown PAC rules" can be used as a field indicating access to selected whole segment areas.

In an exemplary embodiment of the present invention, information regarding the control of a segment area may be used that is different from the position information, such as information recorded in the “Segment” field, as will be described below.

11 illustrates control information regarding a region of a segment for a high density optical disc in accordance with another exemplary embodiment of the present invention.

One segment may be represented by one record and may include a “Status 1” field and a “Status 2” field, intended to indicate the controllability of the corresponding segment area, the “First PSN” field, intended to provide the first physical sector number of the segment area, and / or the "Last PSN" field, intended to represent the last physical sector number of a segment-region.

The “Status 1” field may be represented by control information of four bits, intended to indicate the control controllability of the corresponding segment area; for example, “0000” in the “Status 1” field may indicate that access to the segment area for playback or recording is not possible, “0001” in the “Status 1” field may indicate that access to the segment area is read-only, " 0010 "in the" Status 1 "field may indicate that access to the segment-area is for recording only, and" 0011 "in the Status 1" field may indicate that access to the segment-area is possible.

Therefore, by determining the accessibility to the corresponding segment area using the “Status 1” field and the “Status 2” field, you can reduce the number of unnecessary access operations to the segment area, and in the case when many segment areas are selected, you can control access to each from segments.

In this example, since the “Status 2” field may be a reserved field intended for future use and may not be used at present, in this example, the “0000” bit is written in the “Status 2” field.

When a segment region is selected, control over each of the segment regions may not be consistent with the controllability of this segment region specified in the "Data Zone" field of "Unknown PAC Rules".

Thus, for example, although access of any type, such as reading and writing, is allowed for all segment regions in the Data Zone field, only reading of the corresponding region can be allowed in the Segment field.

In this example, the “Segment” field indicates that control is applied to the segment area, which corresponds only to reading. Thus, depending on the controllability according to the “Data Zone”, control in relation to the segment area can be carried out using the “And” condition with the “Segment” field. Accordingly, if the "Data Zone" field means that access to all areas-segments allocated according to the "Data Zone" field for reading or writing is not possible, access to all areas-segments will be impossible, regardless of the control over the field "Segment", and in the case when the "Data zone" field is set so that access to all segments-segments is allowed, if it is established that access to individual regions-segments is not possible, access to this segment-segment will be impossible.

As described with respect to the PAC of a high density optical disc, its recording monitoring portion may be applicable to high density optical discs with the possibility of physical recording of BD-R and BD-RE and may depend on the recording characteristics of the high density optical disc.

By recording the number of the first physical sector of the corresponding region-segment in the "First PSN" field shown in Fig. 11, and the numbers of the last physical sector of the corresponding region-segment in the "Last PSN" field, as shown in Fig. 11, we can indicate the position of the region segment on the disk.

12 is a block diagram of an optical recording / reproducing apparatus in accordance with an exemplary embodiment of the present invention.

As shown in FIG. 12, an optical recording / reproducing apparatus may include a recording / reproducing apparatus 10 for recording / reproducing in relation to the optical disc, and a main apparatus 20 for controlling the recording / reproducing apparatus 10. In an exemplary In an embodiment, the recording / reproducing device 10 may act as an “optical drive” as described above in connection with many exemplary embodiments of the present invention. i.

In an exemplary embodiment, the host device 20 transmits a recording or reproducing instruction for recording to or reproducing from a specific area of the optical disc to the recording / reproducing device 10, and the recording / reproducing device 10 performs recording / reproduction in relation to this specific area, in accordance with the said instruction received from the host device 20.

The recording / reproducing device 10 may further include an interface section 12 for communicating, such as exchanging data and instructions, with the main device 20, an optical head section 11 for directly recording / reading data in relation to the optical disk, the processor 13 data intended for receiving a signal from section 11 of the optical head and restoring the desired signal value or modulating the signal to be recorded, to obtain a signal that m You can record on an optical disk, a servo section 14, designed to control section 11 of the optical head for accurate reading of the signal from the optical disk or for accurate recording of the signal on the optical disk, a storage device 15, designed for temporary storage of various kinds of information, including control information and data, and a controller 16 for controlling various sections of the recording / reproducing device 10.

An example of a method for recording a PAC on a high density recordable optical disc using an example optical recording / reproducing apparatus will be described below.

After installing the optical disc in the optical recording / reproducing apparatus, the control information can be read from the optical disc and can be stored in the storage device 15 of the recording / reproducing apparatus 10 for use during recording / reproduction of the optical disc.

In this state, if the user wants to record in a specific area of the optical disc, the host device 20, considering this as a recording instruction, transmits information about the desired recording position to the recording / reproducing device 10 along with the data to be recorded.

The controller 16 in the recording / reproducing device 10 may receive a recording instruction, determine whether the region of the optical disk in which the main device 20 wishes to record is a defective region or not, according to the control information stored in the memory 15, and / or performs recording data in accordance with the recording instruction received from the host device 20 to an area that is not a defective area.

If it is determined that recording on the entire disc or in a specific area of the disc includes new properties that were not provided for in the previous version of the recording / reproducing device, which may result in these properties not being perceived by the previous version of the recording / reproducing device, or if it is intended to limit functions such as recording or playback in relation to a specific area of the disc, in accordance with a restriction set by the user, the recording / reproducing controller 16 his device 10 can record information on the control of the area in the PAC zone on the disc as an "Unknown PAC rule". The controller 16 of the recording / reproducing device 10 can also record PAC information, such as PAC_ID, for the recorded state and segment information, which is control information regarding this particular area of the disc.

In this example, if the recorded PAC includes control information for the entire disk area, the “Flag of the entire disk” field can be recorded, and if at least one region-segment is selected in the disk area to control access to the entire area, the number of selected areas -segments is recorded in the "Number of segments" field, and control information, such as accessibility and / or other relevant information, can be recorded in the "Data zone" field of the "Unknown RAS rule". If it is required to carry out individual control regarding segment areas, the control information and the position of the segment can be recorded in the "Segment" field.

The PAC can be recorded in the PAC2 zone of the INFO2 zone with a size of one cluster, and a copy of the PAC of this PAC can be recorded in the PAC1 zone of the INFO1 zone as a backup.

The controller 16 can provide information about the position of the area in which the data is recorded, or about the PAC zone, as well as data in the servo section 14 and the data processor 13 in order to finish recording in the desired position on the optical disc through the optical head section 11.

In addition, a method for recording / reproducing a high density optical disc on which PAC information is recorded in accordance with the above example of the method will be described below.

After installing the optical disc in the optical recording / reproducing apparatus, control information can be read from the optical disc and stored in the storage device 15 of the recording and reproducing apparatus 10 for use during recording and reproduction of the optical disc.

The information in the storage device 15 may include information about the position of the various zones included in the PAC zone on the disk. In particular, the positions of the actual PACs in the PAC area can be known from the disc description structure (DDS) information. After the positions of the valid PACs are known, the PAC_ID field from the PAC can be analyzed to determine if the PAC_ID is identifiable PAC_ID.

If the PAC_ID is identifiable, it is determined according to the method that the recording and reproducing device that recorded the data on the disc have a version identical to the version of the existing recording and reproducing device, or that there are no separate restrictions on recording / reproduction, and that recording / reproduction is performed in accordance with the instructions from the host device 20.

If the PAC ID is not identifiable, it is determined according to the method that the recording and reproducing apparatus that recorded data on the disc has a version different from the version of the existing recording and reproducing apparatus, and recording / reproducing is performed in accordance with the instruction from the host apparatus, referring to the areas disc recording / playback restrictions, including the "Unknown PAC rule" and "segment".

Accordingly, the controller 16 provides location information and data in accordance with the instruction from the host device to the servo section 14 and the data processor 13, which allows you to finish recording / playback at the desired location on the optical disc through the optical head section 11.

As described above, methods and apparatus for recording and reproducing from a single-recording high-density optical disc in accordance with exemplary embodiments of the present invention may have one or more of the following advantages.

First, specifying the available disk area for a drive of a different version using PAC can provide more reliable protection for the data area in which user data is recorded, for example, to prevent unauthorized access (for example, hacking) or reduce its likelihood.

Secondly, efficient data recording and / or data reproduction in relation to a high density optical disc is improved by using a PAC that manages the entire data area or part of the data area on the disk.

Industrial applicability

For specialists in the art it will be obvious that various modifications and variations can be used in relation to the above-described exemplary embodiments of the present invention, without departing from the essence or scope of the invention. Thus, it is intended that the present invention cover all such modifications and variations of the present invention provided that they fall within the scope of the appended claims and their equivalents.

Claims (31)

1. The recording medium containing
user data area and
a control data area in which access control information for controlling access to a user data area is stored, wherein the access control information defines one or more segment zones in the user data area,
wherein the access control information includes a number of segments field identifying the total number of segment zones defined by access control information and a rule used when access control information cannot be recognized. 2. The recording medium according to claim 1, in which the access control information performs a specific function or has a specific application, including controlling the reading of data from said zone segments and / or the writing of data to said zone segments. 3. The recording medium according to claim 1, wherein the access control information includes address information of said segment zones. 4. The recording medium according to claim 1, in which the access control information is recorded in the cluster of the recording medium. 5. The recording medium according to claim 1, wherein said rule includes data zone bits for said segment zones, wherein data zone bits indicate actions available for said zone segments. 6. The recording medium according to claim 5, in which said actions include reading and / or writing. 7. The recording medium according to claim 6, in which the bits of the data zone indicate the ability to record and / or play data in the said zone-segments. 8. The recording medium according to claim 1, in which the access control information includes
a portion corresponding to the header for storing the field of the number of segments and the list of segments, and
a part corresponding to specific information, which includes information specific to access control information. 9. The recording medium of claim 8, in which the part corresponding to the header includes a segment indicator identifying a set of zone segments in the user data area of the recording medium. 10. The recording medium of claim 8, in which the part corresponding to the header includes a pointer to the main set of segments identifying the number of zones-segments of the main set, and a pointer to the subset of segments identifying the number of zones from the subset in the user data area of the recording medium. 11. The recording medium according to claim 1, further comprising a backup area in which a copy of access control information is stored, wherein the control data area and the backup area are located in an internal area of the recording medium. 12. The recording medium according to claim 11, in which the starting and ending positions of said segments are indicated at the boundaries of the clusters. 13. The recording medium according to claim 11, in which the total number of said segments is less than or equal to 32. 14. A method of recording data on a recording medium comprising the steps of:
recording access control information for controlling access to the user data area on the recording medium, the access control information defining one or more segment zones in the user data area, wherein the access control information includes a number of segments field identifying the total number of segment zones, defined by access control information, and a rule used when access control information cannot be recognized. 15. The method according to 14, further comprising stages, in which
identify said segment zones according to access control information and
write user data to identified segment zones. 16. The method of claim 14, wherein the access control information includes address information of said segment zones. 17. The method of claim 14, further comprising recording a copy of the access control information in the backup area on the recording medium, wherein the control data area and the backup area are located in an internal area of the recording medium. 18. The method of claim 14, wherein the start and end positions of said segments are indicated at the boundaries of the clusters. 19. The method of claim 14, wherein the total number of said segments is less than or equal to 32. 20. A method of reproducing data from a recording medium, comprising stages in which
read access control information designed to control access to the user data area, and the access control information defines one or more zone zones in the user data area, wherein the access control information includes a number of segments field identifying the total number of segment zones defined access control information, and the rule used when access control information cannot be recognized, and
reproduce user data recorded in said segment zones based on access control information. 21. The method according to claim 20, in which the starting and ending positions of said segments are indicated along the boundaries of the clusters. 22. The method according to claim 20, in which the total number of said segments is less than or equal to 32. 23. A device for recording data on a recording medium containing
a head configured to write data to the recording medium, and
a controller configured to control a head for recording data on a recording medium, wherein the controller is configured to control a head so as to record access control information for controlling access to a user data area on the recording medium, wherein the access control information defines one or more segment zones in user data area, wherein the access control information includes a field of the number of segments identifying the total number of zones-segments specified by the information by access control, and the rule used when access control information cannot be recognized. 24. The device according to item 23, in which the controller controls access to the entire area of user data, if the number of segments is zero. 25. The apparatus of claim 23, wherein the access control information includes address information of said segment zones. 26. The device according to item 23, further containing
a master device configured to generate a write command on the recording medium and transmit this command to the controller. 27. The device according to item 23, in which the controller is further configured to control the head so that it records a copy of the access control information in the backup area on the recording medium, while the control data area and the backup area are located in the internal area of the recording medium. 28. The device according to item 23, in which the initial and final positions of the said segments are indicated along the boundaries of the clusters. 29. The device according to item 23, in which the total number of these segments is less than or equal to 32. 30. A device for reproducing data from a recording medium containing
a head configured to read data from the recording medium, and
a controller configured to control the head so that
read access control information intended to control access to the user data area on the recording medium, the access control information defining one or more zones-segments in the user data area, wherein the access control information includes a number of segments field identifying the total number of zones segments defined by access control information, and a rule used when access control information cannot be recognized, and
reproduce user data recorded in said segment zones based on access control information. 31. The device according to item 30, further containing
the main device configured to generate a command to play from the recording medium and transmit this command to the controller.

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