JP2012518241A - Information recording medium, recording / reproducing apparatus, and recording / reproducing method - Google Patents

Abstract

  By efficiently arranging optical power control (OPC) areas on three or more layers of information recording media, it is possible to smoothly perform data recording / reproducing of other layers while reducing the influence of the OPC operation during recording / reproducing. it can. In the information recording medium having at least three recording layers, each recording layer includes at least one optical power control (OPC) region, and each OPC region of each recording layer is centered on a radius with an adjacent layer. Assigned so as not to overlap.

Description

  The present invention relates to an information recording medium, a recording / reproducing apparatus, and a recording / reproducing method, and more particularly to a high-density information recording medium having a plurality of recording layers.

  In order to increase the capacity or volume of information transmission via an information recording medium or a wired / wireless network, various methods have been devised, such as high density and multiple layers of data recorded on the information recording medium. In general, each layer of the information recording medium is provided with an area for disc recording / reproduction management. Therefore, such an area for disc recording / reproduction management is further required by multiple layers. There is a case. A typical case is an optical power control area (OPC) area. The OPC area is a test area for calibrating power, and is an area for finding an appropriate power for recording and reproducing data on the medium through the test. . In order to perform a test to find the optimum power, it is possible to test at a power higher than the normal recording power, so it is very likely that the area of the adjacent layer near the same radius will be damaged, The region of the layer adjacent to a given OPC region (especially the layer below the direction of travel of the optical beam) is difficult to use. This requires a new OPC area in the case of multiple layers. As an example, a Blu-ray disc (BD) has an OPC area for a single layer (SL) or a dual layer (DL). A separate OPC area is required for a triple layer (TL) disk or a quadruple layer (QL) disk.

  The present invention provides an information recording medium that smoothly arranges data recording and reproduction of other layers while reducing the influence of the OPC operation at the time of recording and reproduction by efficiently arranging the OPC area on the information recording medium of three or more layers. An object is to provide an apparatus and a method.

  It is another object of the present invention to provide an information recording medium, apparatus, and method capable of effectively managing continuous defect replacement when the user area and the spare area are used in opposite directions.

  In order to solve the above problems, in an information recording medium having at least three recording layers, each recording layer includes at least one optical power control (OPC) region, and each OPC region of each recording layer Are assigned so that they do not overlap with adjacent layers around the radius.

  In an information recording medium including at least three recording layers, the information recording medium has at least one recording layer to which permanent information and control data (PIC: permanent information & control data) areas are assigned, and at least two to which no PIC area is assigned. Each of the OPC areas allocated to each of the at least two recording layers to which the PIC area is not allocated is arranged at a different radius, and at least two recording layers to which the PIC area is not allocated At least one of the OPC areas allocated to each is allocated within the radius to which the PIC area is allocated, and at least one other area partially overlaps within the radius to which the PIC area is allocated. To be assigned.

  An information recording medium comprising: a user data area for recording user data; and a spare area for substituting a defect detected in the user data area, the tracking direction of the user data area, and the spare area Directions of use are opposite to each other, and when data is recorded in a continuous replacement cluster of the spare area to replace a continuous defective cluster detected in the user data area, the continuous replacement Alternate clusters in the cluster are used in the tracking direction.

  According to the present invention, by efficiently arranging the OPC area on an information recording medium having three or more layers, data recording / reproduction of other layers can be smoothly performed while reducing the influence of the OPC operation during recording / reproduction. Can do.

  In addition, according to the present invention, it is possible to effectively manage continuous defect replacement when the use directions of the user area and the spare area are opposite.

FIG. 3 is a diagram showing a disk layout for explaining a basic concept of a method for allocating an OPC area in consideration of eccentricity on an information recording medium having three or more layers according to the present invention. It is a figure which shows the 1st example of the disc layout of BD-R (blu-ray disc recordable) TL (triple layer) / QL (quadruple layer) (32GB / L or 33GB / L). It is a figure which shows the 2nd example of the disk layout of BD-R TL / QL (32GB / L or 33GB / L). It is a figure which shows the 3rd example of the disk layout of BD-R TL / QL (32GB / L or 33GB / L). It is a figure which shows the 4th example of the disk layout of BD-R TL / QL (32GB / L or 33GB / L). It is a figure which shows the 5th example of the disk layout of BD-R TL / QL (32GB / L or 33GB / L). It is a figure which shows the 1st example of the disk layout of BD-R TL (32GB / L or 33GB / L). It is a figure which shows the 2nd example of the disk layout of BD-RTL (32GB / L or 33GB / L). It is a figure which shows the 1st example of the disc layout of BD-RE (blu-ray disc rewritable) TL / QL (32GB / L or 33GB / L). It is a figure which shows the 2nd example of the disk layout of BD-RE TL / QL (32GB / L or 33GB / L). It is a figure which illustrates the reference disc parameter (reference disc parameter) by the capacity | capacitance for every layer. It is a reference diagram for explaining an insufficient inner zone capacity of HC BD-R QL (high capacity blu-ray-recordable quadruple layer). It is a figure which shows the detailed structure of inner zone layout option 1. FIG. FIG. 3 shows detailed INFO 1 1360 and INFO 2 1370 of HC BD-R. It is a figure which shows detailed INFO1 1360 and INFO2 1370 of HC BD-RE. It is a figure which shows the detailed structure of the inner zone layout option 2 of RE / R (rewritable / recordable) TL disc. FIG. 3 shows detailed INFO 1 1650 and INFO 2 1660 of HC BD-R. It is a figure which shows detailed INFO1 1650 and INFO2 1660 of HC BD-RE. Fig. 5 shows a detailed configuration of inner zone layout option 2 for an RQ disc. It is a figure for demonstrating continuous defect substitution in a spare area when the use direction of a user data area and the use direction of a spare area are the same. FIG. 10 is a reference diagram for explaining a continuous alternative recording state that can be shown when the use direction of the user data area is opposite to the use direction of the spare area. FIG. 10 is a diagram illustrating an example of a recording method for saving time required for continuous defect replacement recording when the tracking direction and the use direction of the spare area are opposite according to the present invention. 1 is a schematic block diagram of a recording / reproducing apparatus according to the present invention. FIG. 24 is a block diagram of a drive in which the recording / reproducing apparatus according to the present invention illustrated in FIG. 23 is implemented. 3 is a flowchart of a recording method according to the present invention. 3 is a flowchart of a reproduction method according to the present invention.

  One feature for solving the problems of the present invention is that in an information recording medium having at least three recording layers, each recording layer includes at least one optical power control (OPC) region, Each OPC area of each recording layer is assigned so as not to overlap with the adjacent layer around the radius.

  Each recording layer includes at least one buffer area adjacent to each OPC area, and the OPC area of the recording layer existing between the two recording layers where the OPC area exists is inside or outside the corresponding OPC area. It is desirable to have adjacent buffer areas.

  The size of the buffer area is preferably allocated to a physical area corresponding to the eccentricity between the recording layers defined by the disc standard.

  Preferably, each OPC area is arranged in a lead-in area of each recording layer.

  Another aspect of the present invention is an information recording medium including at least three recording layers, and has at least one recording layer to which permanent information and control data (PIC: permanent information & control data) areas are allocated, The PIC area has at least two unallocated recording layers, and each OPC area allocated to each of the at least two recording layers to which the PIC area is unallocated is arranged at a different radius, and the PIC area is not yet allocated. At least one of the OPC areas allocated to each of the at least two recording layers allocated is allocated within the radius allocated to the PIC area, and at least one other area is allocated to the radius allocated to the PIC area. Are assigned to be partially overlapped.

  According to still another aspect of the present invention, in an information recording medium including at least three recording layers, the recording medium has at least two recording layers to which PIC areas are allocated, and at least one recording layer to which PIC areas are not allocated. The OPC area assigned to at least one recording layer to which the PIC area is not assigned is different from the OPC area assigned to each of the at least two recording layers to which the PIC area is assigned. PIC areas assigned to the at least two recording layers are assigned to the same radius, and an OPC area assigned to at least one recording layer to which the PIC area is not assigned is the at least 2 recording layers. Within the radius to which at least one PIC area of the PIC areas assigned to the recording layer of the layer is assigned. There or are overlapped, or assigned to the radius.

  According to still another aspect of the present invention, in an apparatus for recording / reproducing data on / from an information recording medium having at least three recording layers, each recording layer includes at least one optical power control (OPC) region, Each OPC area of the layer records and reproduces data on the information recording medium, and a pickup that records and reproduces data in association with the information recording medium allocated so as not to overlap with an adjacent layer around a radius. A control unit for controlling the pickup.

  According to still another aspect of the present invention, the information recording medium includes a user data area for recording user data and a spare area for replacing a defect detected in the user data area. The tracking direction of the area and the use direction of the spare area are opposite to each other, and data is recorded in the continuous replacement cluster of the spare area to replace the continuous defective cluster detected in the user data area. When doing so, an alternative cluster among the consecutive alternative clusters may be used in the tracking direction.

  According to still another aspect of the present invention, in an apparatus for recording data on an information recording medium, a user data area for recording user data, a spare area for replacing a defect detected in the user data area, And a tracking direction of the user data area and a use direction of the spare area are opposite to each other, a pickup for recording / reproducing data in relation to the information recording medium, and a continuous detected in the user data area When data is recorded in a continuous replacement cluster in the spare area for replacing a defective cluster, among the continuous replacement clusters, data is recorded from the first replacement cluster in the tracking direction. And a control unit for controlling the pickup.

  According to still another aspect of the present invention, in an apparatus for reproducing data from an information recording medium, a user data area for recording user data, a spare area for replacing a defect detected in the user data area, And a tracking direction of the user data area and a use direction of the spare area are opposite to each other, a pickup for recording / reproducing data in relation to the information recording medium, and a continuous detected in the user data area Control to control the pickup to read data from the first alternative cluster in the tracking direction among the continuous alternative clusters when reading data from the continuous alternative cluster of the spare area that replaces the defective cluster Part.

  Still another feature of the present invention includes a user data area for recording user data and a spare area for replacing a defect detected in the user data area, and the tracking direction of the user data area, In the method for recording data on the information recording medium in which the use direction of the spare area is opposite to each other, continuous replacement of the spare area for replacing continuous defective clusters detected in the user data area Recording data in a cluster includes recording data from the first alternative cluster in the tracking direction among the continuous alternative clusters.

  Still another feature of the present invention includes a user data area for recording user data and a spare area for replacing a defect detected in the user data area, and the tracking direction of the user data area, In the method of reproducing data from information recording media having opposite usage directions of the spare area, the spare area has a continuous replacement cluster that replaces the continuous defective cluster detected in the user data area. When reproducing data, the method includes reproducing data from the first alternative cluster in the tracking direction among the continuous alternative clusters.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  According to the present invention, in an information recording medium having three or more layers, each layer is provided with at least one OPC area on the inner peripheral side, and each OPC area does not overlap with an adjacent layer around the radius. Assigned.

  The OPC area of each layer has at least one adjacent buffer area in the layer, but when viewed from the center of the disk radius, the OPC area existing between two OPC areas among the OPC areas existing at least as many as the number of layers is , Adjacent buffer regions on both the inner side and the outer side.

  As the size of the buffer area, a physical area corresponding to the eccentricity between the layers defined by the disk standard is allocated. For example, if the eccentricity between adjacent layers stipulates that the disk should be manufactured with an error within a radius of 0.1 mm, the buffer area must be allocated with a radius of 0.1 mm or more.

  Interlayer eccentricity refers to a radius error between regions considered to be at the same radius of each layer around a reference point (for example, the center of a completed disc). For example, when it is defined that the data area of each recording layer starts from a radius of 24 mm, it is difficult to start accurately due to manufacturing characteristics, and a multi-layer disc completed with a recording layer is manufactured. In order to achieve this, there is also an interlayer error. Generally, if it is defined that each recording layer has an error limit of ± 0.05 mm and starts from 24.0 ± 0.05 mm in the standard, the reference of the completed disc On the other hand, in some recording layers, the data area starts from 23.95 mm, and in some recording layers, the data area starts from 24.05 mm. In this case, the maximum eccentricity between the recording layers is 0.1 mm. Due to such an interlayer eccentricity, when an OPC area is allocated, the buffer area must be allocated in consideration of the interlayer eccentricity between adjacent layers. In particular, the influence of the layer below the direction in which the light beam travels cannot be ignored.

  FIG. 1 is a disk layout for explaining a basic concept of a method for allocating an OPC area in consideration of eccentricity on an information recording medium having three or more layers according to the present invention.

  In FIG. 1, the information recording medium is composed of four recording layers, L0 10, L1 20, L2 30, and L3 40. The light beam is incident from the L3 side. Although the optical power control (OPC) region can be arranged in the lead-in region or the lead-out region, FIG. 1 shows that the optical power control (OPC) region is arranged in the inner peripheral lead-in region. OPC area 0 21 is arranged in L 0, OPC area 1 22 is arranged in L 1, OPC area 2 23 is arranged in L 2, and OPC area 3 24 is arranged in L 3. The OPC regions arranged in two layers adjacent to each other are arranged so as to be shifted from each other so as not to overlap with each other around the radius. In other words, each of OPC regions 0 21 and OPC regions 122 of L0 and L1, which are adjacent two layers, considers interlayer eccentricity so as not to overlap around the radius, as much as buffer region 011. Arranged at intervals. Similarly, each OPC area 122 and OPC area 2 23 of L1 and L2 are arranged with an interval as large as the buffer area 112 so as not to overlap around the radius in consideration of interlayer eccentricity. The Similarly, the OPC area 223 and the OPC area 324 of L2 and L3 are arranged at intervals of about the buffer area 213 so as not to overlap with each other in the center of the radius in consideration of the interlayer eccentricity. Is done.

  A layer arranged between two layers in which the OPC region exists, that is, a layer existing between L1 20 having the OPC region 122 and L3 40 having the OPC region 3 24. In the OPC area 2 23 of the L2 30, a buffer area 1 12 and an adjacent buffer area 2 13 are both arranged inside and outside the OPC area 2. In addition, the OPC area 1 of L1, which is a layer existing between L0 having the OPC area 0 and L2 having the OPC area 2, is also adjacent to the inner and outer sides of the OPC area 1. Area 0 11 and adjacent buffer area 1 12 are both arranged.

  It is desirable that the size of such a buffer area is allocated to a physical area corresponding to the eccentricity between the layers defined by the disk standard. For example, if the adjacent interlayer eccentricity specifies that the disk should be manufactured with an error within a radius of 0.1 mm, the buffer area must be allocated with a radius greater than 0.1 mm.

  In FIG. 1, the data area 60 starts from the portion where the inner circumferential lead-in area 50 ends. In FIG. 1, the track path using the information recording medium starts from the inner circumference side of L0 and proceeds to the outer circumference side, and at L1, the opposite track path (OTP) proceeds from the outer circumference side to the inner circumference side. ). Similarly, an opposite track path (OTP) starts from the inner peripheral side of L2 and proceeds to the outer peripheral side, and L3 starts from the outer peripheral side and proceeds to the inner peripheral side. The use direction of the OPC area in each layer, that is, the data recording direction in the OPC area is opposite to the track path direction. For example, in L0, the track path is from the inner circumference side to the outer circumference side, but the usage direction of OPC0 is the outer circumference side inner circumference side.

  Accordingly, the arrangement of the OPC areas from L0 to L3 can be variously set. If the arrangement of the OPC areas in L2 and L3 is the same as the arrangement of the OPC areas in L0 and L1, In terms of record management, the disc can be used conveniently.

  FIGS. 2 to 10 show a BD-R (blu-ray disc recordable) / BD-RE (blu-ray disc rewritable) 32 GB / L or 33 GB / L TL (triple layer) disc or QL (quadruple layer) disc. The structure of the inner peripheral region is shown. The higher the disk surface, that is, L3, the lower the layer. All of the lower layer areas having the same radius as the OPC area allocated to the higher layer are reserved areas (reserved).

  The numbers in parentheses in the drawings indicate the size of the area, and the drawing symbols are displayed only in necessary portions.

  FIG. 2 is a first example of a BD-R TL / QL (32 GB / L or 33 GB / L) disk layout.

  Referring to FIG. 1, an OPC area 0 201, an OPC area 1 202, an OPC area 2 203, and an OPC area 3 204 are arranged in L0 to L3, respectively. A buffer area 0 211, a buffer area 1 212, and a buffer area 2 213 are arranged so that the areas do not overlap in the radial direction. The lower layer areas having the same radius as the OPC area allocated to the higher layer are all reserved as reserved areas 221, 222, and 223. For example, the lower layer in the same radius of the OPC area 3204 allocated to L3, that is, the areas 223 of L1 and L2, are all reserved. At this time, the permanent information and control data (PIC) area 231 in L0 is excluded, but unlike the wobbled groove area, the PIC area 231 is an HFM (high frequency modulated) groove, and OPC is formed in the upper layer. Even if a region exists, its influence can be ignored.

  In addition to this, temporary disc management areas (TDMA) 241, 242, 243, 244, defect management areas (DMA), physical control areas (TDMA) are used for recording / reproduction management of information recording media. A PAC (physical access control), a drive area, and a control data area are allocated.

  In FIG. 2, TDMA is arranged from each layer L0 to L3, and TDMA0 to TDMA3, respectively. Assigned within. That is, TDMA0 to TDMA3 are arranged only on the outer side of the OPC area 0201 arranged on the outermost side from the inner peripheral side to the outer peripheral side. Such a structure is simple and safe in connection with the use of the OPC area because the TDMA arrangement is arranged in a separate space without affecting the OPC area. Since the structure is arranged separately without affecting the area, the lead-in area requires more capacity accordingly.

  OPC area, temporary disk management area (TDMA), defect management area (DMA), physical control area (PAC), drive area (drive area), control data area (control data area) from radius 22.512 mm When assigned, the start of the data area is determined by the recording linear density; the size of the OPC area, buffer zone, TDMA, INFO 1 and INFO 2 areas allocated for disc management; It is determined.

  Eventually, the starting radius r of the data area is determined to satisfy the following mathematical formula.

π * (r ^ 2−y ^ 2) = “Channel bit # of RUB” * “# of RUBs in between and r” * “Track Pitch” * “Channel bit length”
Here, π = 3.141592, y = PIC start radius, “# of RUBs in between y and r” = # of RUBs in the case of wobbled grooves.

  The start of the data area is determined by the size of the OPC area, the size of the TDMA, the size of the buffer area, and the size of the INFO zone (the number of RUBs (recording unit blocks) is a kind of size).

  The OPC area 0 201 in FIG. 2 is used as an area in which the adjacent area is different in the same layer L0. That is, the area adjacent to the inner peripheral side of the OPC area 0 is the buffer area 0, but the area adjacent to the outer peripheral side is the INFO 2 area. As described above, when the adjacent area of the OPC area is used, that is, when the adjacent area is used for storing predetermined data, when the adjacent area of the same layer is tested in the OPC area with excessive power, There is a high possibility of damage. Accordingly, it is preferable to provide a buffer area of at least 2 tracks (0.64 μm from the beam center because the track pitch is 0.32 μm). However, considering the linear density, an appropriate number of recording unit blocks is set as the OPC area. It is desirable to provide a buffer area inside the start and / or end of the area and in an adjacent area adjacent to the OPC area. In the case of 32 GB or 33 GB, a radius of 22.5 to 24.5 mm and a blu-ray disc RUB (recording unit block) (1932 * 498 channel bits) requires 2.6 to 2.8 RUB per track. It is desirable to place at least 6 RUB or more as a buffer area.

  FIG. 3 is a second example of a disk layout of BD-R TL / QL (32 GB / L or 33 GB / L). In FIG. 3, the arrangement of the OPC area is the same as the first example of FIG. However, the TDMA arrangement is different. In FIG. 3, the TDMA having a different arrangement as compared with the configuration of FIG. 2 is indicated by shading. In FIG. 2, the TDMA array is arranged in a section in which the OPC area is arranged and a separate section, but in FIG. 3, each TDMA in each layer is arranged with the OPC area in the layer sandwiching the buffer area. Is done. Therefore, for example, when the OPC2 203 is used as a reference, the region 222 lower than the OPO2 203 is reserved, but the TDMA3 244 is arranged in the L3 higher than the OPC region 2203. The reason why such an arrangement is possible is that the light beam incident from the higher layer has a greater influence on the lower layer than the target layer. That is, when test recording is performed on the OPC area 2203 in L2, the influence of the light beam for the test recording has a large influence on L1, but does not have much influence on L3. Therefore, TDMA3 244 is arranged in L3 which is not affected much.

  By arranging in this way, the capacity required for the lead-in area can be saved.

  FIG. 4 is a third example of a BD-R TL / QL (32 GB / L or 33 GB / L) disk layout. The layout of FIG. 4 is the same as the layout of FIG. 3 except that the arrangement of TDMA2 243 and TDMA3 244 is different from FIG. In the case of L0, there is a heat sink and there is no problem even if TDMA1 242 is present in the corresponding region of L1, but in the case of L1 or more, the heat transfer is not It is a form arranged in order to become bidirectional and prevent OPC and TDMA from being adjacent to each other.

  FIG. 5 is a fourth example of a BD-R TL / QL (32 GB / L or 33 GB / L) disk layout. The layout of FIG. 5 is the same as the layout of FIG. 3 except that TDMA0 241 and TDMA1 242 are different in size. In order to make the existing disk standard, that is, a data area compatible with a standard starting from a radius of 24.0, the size of TDMA0 241 is reduced to 1024 bytes, and instead, the size of TDMA1 242 is reduced by the size of TDMA0. The size is increased to 3072 bytes. The example actually displayed in FIG. 5 is a case of 32 GB / L. In 32 GB / L, β values are added to the buffer areas 0, 1, and 2. The β value is the number of RUBs to be added. Is shown.

  FIG. 6 is a fifth example of a disk layout of BD-R TL / QL (32 GB / L or 33 GB / L). The layout of FIG. 6 is the same as the layout of FIG. 5 except that the arrangement of TDMA2 243 and TDMA3 244 is different. As described above, in the case of L0, there is no problem even if TDMA1 exists in the corresponding region of L1 because there is a reflective film (heat sink) and heat transfer becomes one side. The transmission is bi-directional and is arranged and configured to prevent OPC and TDMA from being adjacent.

FIG. 7 is a first example of a BD-R TL (32 GB / L or 33 GB / L) disk layout. The layout of FIG. 7 is the same as the layout of FIG. 3, but in the case of FIG. 7, since there are three layers, there is no L3 arrangement, which is different from FIG. FIG. 8 is a second example of a BD-R TL (32 GB / L or 33 GB / L) disk layout. The layout of FIG. 8 is the same as the layout of FIG. 7 except that TDMA2
243 sequences are different. As described above, in the case of L0, there is no problem even if TDMA1 exists in the corresponding region of L1 because there is a reflective film (heat sink) and heat transfer becomes one side. This is a form in which transmission is bidirectional and OPC and TDMA are not adjacent to each other. The arrangement of OPC1 and OPC2 is also different from the layout of FIG.

  FIG. 9 is a first example of a disk layout of BD-RE TL / QL (32 GB / L or 33 GB / L).

  A BD-R (blu-ray disc recordable) is a disc that cannot be rewritten and can be recorded only once, and a BD-RE (blu-ray disc recordable) is a rewritable disc. The TDMA is a rewritable disc BD-RE because the TDMA is a disc that can be recorded only once (write-once type) and is an area for temporarily recording information for disc recording / playback management. Then, such TDMA is unnecessary.

  Accordingly, the disk layout of FIG. 9 is similar to the disk layout of FIGS. 2 to 6, except that there is no TDMA area and the PIC area 921 is also arranged in L1. The BD-RE DL (dual layer) has no buffer. In RE, although it is practically unnecessary in terms of disk characteristics, in BD-RE TL (triple layer), since it has the same structure as R TL, a buffer area of R TL is used as a reserved area in RE TL. (Reserved).

  FIG. 10 is a second example of a BD-RE TL / QL (32 GB / L or 33 GB / L) disk layout. The layout of FIG. 10 is the same as the layout of FIG. 9 except that the arrangement of OPC0 and OPC1, OPC2 and OPC3 is different.

  It goes without saying that the size of each region can be changed in the layouts of FIGS. In the example of FIGS. 2 to 10, the size of the OPC area is mainly 2048 bytes and the size of TDMA is also 2048 bytes. However, the size of such an area is variable depending on the total capacity of the disk. Needless to say.

  In a recording medium having a plurality of layers, the lead-in capacity may be insufficient by allocating an OPC area for each recording layer. With reference to FIGS. Considering this, we propose effective placement of the lead-in area.

  FIG. 11 illustrates reference disc parameters according to the capacity of each layer.

  As a capacity structure, 25 GB / L 1110 is a structure with 25 GB (gigabyte) per layer, 32 GB / L 1120 is a structure with 32 GB per layer, and 33.4 GB / L 1130 is a structure with 33.4 GB per layer. Is displayed.

  Reference disc parameters include track pitch, RUB size, pi, information zone / PZ1 start radius, recordable zone / PIC start radius, data zone range, channel bit length, data zone capacity, and lead-in capacity. Has been. Here, PZ1 refers to protection zone 1.

  FIG. 12 is a reference diagram for explaining an insufficient inner zone capacity of HC BD-R QL (high capacity blu-ray recordable quadruple layer).

  If you need one OPC area per layer, an OPC buffer zone with data zone internal diameter tolerance (max 0.2 mm), and at least one TDMA area, the lead-in capacity for a four-layer disk (QL disk) is , As shown in FIG.

  When the OPC area and the buffer area are allocated to different radii, and the OPC buffer size is calculated from the radius of 23.5 to 23.6 mm, the lead-in capacity is sufficient in the case of 32 GB / L 1120. Absent. In FIG. 12, X is 826 for QL (four-layer disc) and 861 for TL (three-layer disc).

  In the case of 25 GB / L 1110, the required lead-in capacity is 9472 RUB, and the actual lead-in capacity is 9479 RUB, which is not a problem.

  Also in the case of 33.4 GB / L 1130, the required lead-in capacity is 10426 RUB, and the actual lead-in capacity is 12656 RUB, which is not a problem.

  In the case of 32 GB / L 1120, the required lead-in capacity is 13230 RUB, and the actual lead-in capacity is 12134 RUB, so the lead-in capacity is insufficient.

  Now, an example of an internal zone layout for solving such a shortage of lead-in capacity will be described. It is used interchangeably whether it is an inner zone or a lead-in area.

Inner zone layout option 1:
Option 1 takes the same inner zone layout structure for both TL and QL discs. More specifically, it is as follows.

  Maintain the starting radius of PZ1.

  A PIC area is assigned to both L0 and L1. No PIC area is allocated from L2.

  Maintain the starting radius of the data zone.

  Reduce TDMA0 size from 2048 to 1024. The TDMA area is reserved for the RE disk.

  Reduce the size of INFO 2 from 256 to 128. Remove the reserved 128 RUB from INFO 2.

  Allocate an OPC buffer zone that covers the tolerance of radius and diameter of the data zone. The OPC buffer zone for the R disk is reserved for the RE disk.

  FIG. 13 shows a detailed configuration of the inner zone layout option 1. On the RE disk, the TDMA area and buffer zone are reserved. Since the RE disk, that is, the rewritable disk does not require TDMA, the area displayed in TDMA and the area displayed in the buffer zone in FIG. 13 are reserved areas.

  With the TL disc (RE / R33.4 GB / L), in FIG. 13, the value added to the buffer zone is added to +, and L3 is removed. In other words, since the TL disc has a three-layer structure, L3 is unnecessary and is removed, and the capacity of the buffer zone is a value obtained by adding the value added as +. For example, it means that the capacity of the buffer zone 2 in the TL disk is 844 + 164.

  Referring to FIG. 13, PIC area 1350 is allocated to L0 and L1, and OPC areas are allocated to L2 and L3, which are two recording layers to which PIC area is not allocated. The assigned OPC2 area 1330 and the OPC3 area 1340 assigned to L3 are arranged at different radii.

  The OPC area 3 1340 is allocated within the radius to which the PIC area 1350 is allocated, and the OPC area 2 1330 is allocated so as to partially overlap the radius to which the PIC area 1350 is allocated.

  Thus, in an information recording medium including at least three recording layers, the information recording medium has at least one recording layer to which a PIC area is assigned, and has at least two recording layers to which the PIC area is not assigned. The OPC areas allocated to each of the at least two recording layers to which the PIC area is not allocated are arranged at different radii, and among the OPC areas allocated to the at least two recording layers to which the PIC area is not allocated. At least one is allocated within the radius to which the PIC area is allocated, and at least one other area is read by allocating partly within the radius to which the PIC area is allocated. The capacity of the in area can be used effectively.

  FIG. 14 shows the detailed INFO 1 1360 and INFO 2 1370 of the HC BD-R. In FIG. 14, PAC is physical access control, DMA is defect management area, and CD is control data.

  In the case of a TL disc (RE / R33.4 GB / L), L3 is removed in FIG.

  FIG. 15 shows detailed INFO 1 1360 and INFO 2 1370 of the HC BD-RE.

  In the case of a TL disc (RE / R33.4 GB / L), L3 is removed in FIG.

Inner zone layout option 2:
The TL disc and the QL disc take different inner zone layout structures.

  The following points are common.

  1) Maintain the starting radius of PZ1.

  2) Allocate a PIC area to both L0 and L1. No PIC area is allocated from L2.

  3) Maintain TDMA0 size. The TDMA area is reserved for the RE disk.

  4) Allocate an OPC buffer zone that covers the tolerance of the radius and diameter of the data zone. The OPC buffer zone for the R disk is reserved for the RE disk.

And HC BD-RE / R
In the inner zone layout of TL disc (33.4 GB / L), the starting radius of the data zone is maintained.

  In the inner zone layout of the HC BD-R QL disc (32 GB / L), the starting radius of the data zone is moved from 24 mm to 24.115 mm. In that case, the data zone capacity is 31.971 GB / L.

  FIG. 16 shows a detailed configuration of the inner zone layout option 2 of the RE / R TL disc.

  On the RE disk, the TDMA area and buffer zone are reserved.

  Referring to FIG. 16, the PIC area 1640 is assigned to L0 and L1, and the PIC area 1640 is not assigned to L2.

The OPC area 2 1630 assigned to L2 is the OPC area 0 assigned to L0.
1610 and OPC area 1 1620 assigned to L1 are assigned to radii different from each other.

  Further, the OPC area 2 1630 to which the PIC area 1640 has not been assigned is assigned within the radius to which the PIC area 1640 has been assigned. Of course, the OPC area 2 1630 in which the PIC area 1640 is assigned to the unassigned L2 may be assigned so as to overlap a part of the radius to which the PIC area 1640 is assigned.

  In this way, the PIC area has at least two recording layers to which the PIC area is assigned, the PIC area has at least one recording layer that is not assigned, and the PIC area has at least one recording layer that is not assigned. The assigned OPC area is assigned to a radius different from the OPC area assigned to each of at least two recording layers to which the PIC area is assigned, and the PIC area assigned to the at least two recording layers is The OPC area allocated to the at least one recording layer to which the PIC area is not allocated is allocated to the same radius, and at least one PIC area among the PIC areas allocated to the at least two recording layers is By partially overlapping within the assigned radius or being assigned within the radius. , It is possible to effectively use the capacity of the lead-in area.

  FIG. 17 shows the detailed INFO 1 1650 and INFO 2 1660 of the HC BD-R.

  CD represents control data.

  FIG. 18 shows detailed INFO 1 1650 and INFO 2 1660 of the HC BD-RE.

  CD represents control data.

  FIG. 19 shows the detailed configuration of inner zone layout option 2 for the RQL disc.

  The layout illustrated in FIG. 19 is similar to the layout illustrated in FIG. 13, except that the TDMA arrangement, the data zone start radius, the buffer size, and the like are different.

Contiguous replacement in the spare area
An information recording medium having defect management is generally provided with a spare area in order to linearly replace defects generated in the user data area. If the defect generated in the user data area is continuous, the spare area is continuously replaced. If the replaced state is indicated as a continuous defect entry (entry), the size of the defect information is reduced. Can do.

  FIG. 20 is a diagram for explaining continuous defect replacement in the spare area when the use direction of the user data area and the use direction of the spare area are the same. Referring to FIG. 20, as a state before a continuous defect occurs, two replacement clusters exist in the spare area 2020, and the next cluster of the two alternative clusters is “next to the spare area”. Indicates a spare cluster designated as “spare cluster indicated by“ next available PSN of SA ””.

  Looking at the state after the occurrence of continuous defects, a defective cluster of 1 to N is generated in the user data area 2010. Therefore, in order to replace this continuously, from cluster 1 There are up to N alternate clusters.

  As shown in FIG. 20, when the use direction of the user data area (tracking direction) and the use direction of the spare area are the same, even when data is recorded in the continuous alternate cluster of the spare area, Recording may be performed as it is along the tracking direction.

  On the other hand, the spare area can be allocated by changing its size in the initialization process or formatting process for flexibility in use, and the spare area can be expanded during use.

  The file system that manages user data is mainly stored at the beginning and end of the volume space where user data is stored, and user data is gradually stored from the beginning of the volume space. It is common. For this reason, the expansion of the spare area is facilitated by reversing the direction in which user data is recorded and the direction in which the spare area is used.

  In such a concept as on a disk, the user data recording direction (tracking direction) and the use direction of the expandable spare area are opposite to each other.

  When the use direction of the spare area and the use direction of the user data area are different from each other, it is difficult to continuously replace the continuous defect. This is because user data is mainly recorded in the tracking direction, but the spare area is used in a direction opposite to the tracking direction.

  FIG. 21 is a reference diagram for explaining a continuous alternative recording state that can be shown when the use direction of the user data area is opposite to the use direction of the spare area. Referring to FIG. 21, when defective clusters 1, 2, and 3 are continuously generated in the user data area 2010, a continuous replacement cluster is used to replace the continuous defective clusters 1, 2, and 3 in the spare area 2020. Data recording is performed on 1, 2, and 3. At this time, since the use direction of the spare area 2020 is opposite to the tracking direction, recording starts from the alternate cluster on the rightmost side, then data is recorded in the second cluster and then in the third cluster. However, since the tracking direction is still from the left side to the right side, data recording in each alternative cluster proceeds from the left side to the right side. That is, in FIG. 21, recording proceeds from the left top to the right inside the alternative cluster 1 in the spare area 2020, and when the recording of the alternative cluster 1 is completed, the pickup jumps to the left top of the alternative cluster 2 When the recording proceeds from the left top in the cluster 2 to the right and the recording of the alternative cluster 2 is completed, the pickup jumps to the left top of the alternative cluster 3 and records from the left top in the alternative cluster 3 to the right. Proceed. Therefore, if the direction of use of the spare area is opposite to the tracking direction, the pickup must jump every time one cluster is recorded even when data is recorded in the continuous replacement cluster of the spare area. Therefore, recording takes a lot of time and the efficiency is considerably reduced. The same problem appears when data recorded in this way is reproduced. That is, in the case of reproduction, since the data is continuously substituted, it is necessary to reproduce cluster 1, jump to reproduce cluster 2, and jump to reproduce cluster 3. It takes a lot of time to play. Therefore, when the tracking direction is opposite to the direction in which the spare area is used, a method for saving the time required for continuous defect replacement recording is proposed.

  FIG. 22 shows an example of a recording method for saving time required for continuous defect replacement recording when the tracking direction and the use direction of the spare area are opposite according to the present invention.

  As a state before a continuous defect occurs, there are two replacement clusters in the spare area 2020, and the next cluster of the two alternative clusters is “the next available PSN in the spare area”. Indicates a spare cluster designated by “next available PSN of SA”.

  Looking at the state after the occurrence of continuous defects, a defective cluster of 1 to N is generated in the user data area 2010. Therefore, in order to replace this continuously, from cluster 1 Up to N are alternate clusters. At this time, the fact that the continuous defect has occurred is known in advance by the drive, that is, the drive knows the total size of the continuous defect replacement cluster that replaces the continuous defect cluster. Therefore, the drive determines the start cluster and the end cluster of the continuous replacement cluster in order to know which cluster in the spare area starts from which cluster to replace the continuous defective cluster. The recording is performed in the tracking direction from the left side to the right side. That is, referring to FIG. 22, the alternative cluster 1 is recorded and then the alternative cluster 2 is recorded, and recording is performed up to the alternative cluster N in such a manner.

  23 to 26 are flowcharts showing a recording / reproducing apparatus using the information recording medium according to the present invention and a process for recording / reproducing data on the information recording medium according to the present invention. The recording / reproducing apparatus and recording / reproducing method associated with the information recording medium according to the present invention will be described with reference to FIGS.

  FIG. 23 is a schematic block diagram of a recording / reproducing apparatus according to the present invention. Referring to FIG. 23, the apparatus according to the present embodiment includes a recording / reading unit 2310 and a control unit 2320.

  The recording / reading unit 2310 records data on the recording medium 100, which is the information recording medium according to the present embodiment, and reads the recorded data under the control of the control unit 2320.

  The control unit 2320 controls the recording / reading unit 2310 to record or read data on the recording medium 100. At the time of recording, data is recorded on the information recording medium according to the present application, or test recording is performed in the OPC area, and at the time of reproduction, data is reproduced from another information recording medium according to the present embodiment.

  The recording side device and the reproducing side device may be implemented by separate devices, or may be implemented by a single system as shown in FIG.

  24 is a block diagram of a drive in which the recording / reproducing apparatus according to the present invention shown in FIG. 23 is implemented. Referring to FIG. 24, the drive includes a pickup as a recording / reading unit 2310. The recording medium 100 is attached to a pickup. In addition, the drive includes a host I / F (interface) 1, a DSP (digital signal processor) 2, an RF AMP (radio frequency amplifier) 3, a servo 4, and a system controller 5 as the control unit 2320.

  At the time of recording, the host I / F 1 receives a recording command together with data to be recorded from a host (not shown). The system controller 5 performs initialization necessary for recording. The DSP 2 adds additional data such as parity to the data to be recorded received from the host I / F 1 for error correction, performs ECC (error correcting code) encoding, and then converts the ECC encoded data. Modulate using the default method. The RF AMP 3 converts the data output from the DSP 2 into an RF signal. The pickup 2310 records the RF signal output from the RF AMP 3 on the recording medium 100. The servo 4 receives an instruction necessary for servo control from the system controller 5 and servo-controls the pickup 2310.

  In particular, the system controller 5 according to the present invention records data on a recording medium in which the OPC area or TDMA area is arranged as in the present embodiment, that is, the recording medium as shown in FIGS. To control.

  In particular, the system controller 5 according to the present invention includes a user data area for recording user data and a spare area for replacing a defect detected in the user data area. The data is recorded on the information recording medium in which the direction and the use direction of the spare area are opposite to each other. When the system controller 5 records data in a continuous replacement cluster in the spare area for replacing a continuous defective cluster detected in the user data area, the system controller 5 The pickup is controlled to record data from the first alternative cluster in the tracking direction (2510 (FIG. 25)).

  During reproduction, the host I / F 1 receives a reproduction command from a host (not shown). The system controller 5 performs initialization necessary for reproduction. The pickup 2310 emits a laser beam to the recording medium 100 and outputs an optical signal obtained by receiving the laser beam reflected from the recording medium 100. The RF AMP 3 converts the optical signal output from the pickup 2310 into an RF signal, and provides the modulated data obtained from the RF signal to the DSP 2, while providing a servo signal for control obtained from the RF signal. Servo 4 is provided. The DSP 2 demodulates the modulated data and outputs data obtained through ECC error correction. On the other hand, the servo 4 receives the servo signal received from the RF AMP 3 and the command necessary for servo control received from the system controller 5, and performs servo control on the pickup 2310. The host I / F 1 sends the data received from the DSP 2 to the host.

  In particular, the system controller 5 according to the present invention reproduces data from the recording medium in which the OPC area or the TDMA area is arranged as in the present embodiment, that is, the recording medium as illustrated in FIGS. To control.

  The system controller 5 according to the present invention includes a user data area for recording user data and a spare area for substituting for a defect detected in the user data area, and tracking the user data area The data is reproduced from the information recording medium in which the direction and the use direction of the spare area are opposite to each other. In particular, at this time, when data is reproduced from the continuous replacement cluster in the spare area that replaces the continuous defective cluster detected in the user data area, the first of the continuous replacement clusters in the tracking direction is first reproduced. The pickup is controlled to reproduce data from the alternative cluster (2610 (FIG. 26)).

  The recording / reproducing method as described above can also be embodied as a computer-readable code on a computer-readable recording medium. Computer-readable recording media include all types of recording devices that can store data that can be read by a computer system. Examples of computer-readable recording media include ROM (read-only memory), RAM (random-access memory), CD (compact disc) -ROM, magnetic tape, floppy (registered trademark) disk, optical data storage device Also included are those embodied in the form of a carrier wave (for example, transmission via the Internet). The computer-readable recording medium can be distributed in a computer system connected to a network, and computer-readable code can be stored and executed in a distributed manner. A functional program, code and code segment for implementing the recording / reproducing method will be easily inferred by programmers in the technical field to which the present invention belongs.

  In the above, this invention was demonstrated centering on the desirable embodiment. Those skilled in the art to which the present invention pertains will understand that the present invention may be embodied in variations that do not depart from the essential characteristics of the invention. Thus, the disclosed embodiments should be considered from an illustrative viewpoint rather than a limiting viewpoint. The scope of the present invention is defined by the terms of the claims, rather than the foregoing description, and all differences that fall within the scope of equivalents should be construed as being included in the present invention.

Claims (12)

In an information recording medium having at least three recording layers,
Each recording layer includes at least one optical power control (OPC) region;
Each information recording medium is characterized in that each OPC area of each recording layer is allocated so as not to overlap with an adjacent layer around a radius.   Each recording layer includes at least one buffer area adjacent to each OPC area, and the OPC area of the recording layer existing between the two recording layers where the OPC area exists is inside or outside the corresponding OPC area. The information recording medium according to claim 1, further comprising an adjacent buffer area.   3. The information recording medium according to claim 2, wherein the size of the buffer area is allocated to a physical area corresponding to an eccentricity between recording layers defined by a disc standard.   The information recording medium according to claim 1, wherein each OPC area is arranged in a lead-in area of each recording layer. In an information recording medium including at least three recording layers,
It has at least one recording layer to which a permanent information and control data (PIC: permanent information & control data) area is allocated, and has at least two recording layers to which the PIC area has not been allocated. Each OPC area assigned to each of the at least two recording layers of the assignment is arranged at different radii,
At least one of the OPC areas assigned to each of at least two recording layers to which the PIC area is not assigned is assigned within the radius to which the PIC area is assigned, and at least one other area is the PIC area. An information recording medium characterized by being allocated so as to partially overlap within the allocated radius. In an information recording medium including at least three recording layers,
Having at least two recording layers to which permanent information and control data areas are assigned, and having at least one recording layer to which PIC areas are not assigned,
The OPC area assigned to at least one recording layer to which the PIC area is not assigned is assigned to a radius different from the OPC area assigned to each of at least two recording layers to which the PIC area is assigned,
The PIC areas assigned to the at least two recording layers are assigned to the same radius,
The OPC area assigned to the at least one recording layer to which the PIC area is not assigned is one radius within the radius to which at least one PIC area is assigned among the PIC areas assigned to the at least two recording layers. An information recording medium in which parts are overlapped or assigned within a radius. In an apparatus for recording / reproducing data on / from an information recording medium having at least three recording layers,
Each recording layer includes at least one optical power control area, and each OPC area of each recording layer is associated with the allocated information recording medium so as not to overlap with an adjacent layer around a radius. A pickup for recording and playing back data,
And a control unit that controls the pickup so as to record and reproduce data on the information recording medium. In an information recording medium,
A user data area for recording user data;
A spare area for replacing a defect detected in the user data area,
The tracking direction of the user data area and the use direction of the spare area are opposite to each other,
When data is recorded in a continuous replacement cluster in the spare area for replacing a continuous defective cluster detected in the user data area, the replacement cluster of the continuous replacement clusters is in the tracking direction. An information recording medium characterized by being used. In an apparatus for recording data on an information recording medium,
Including a user data area for recording user data, and a spare area for substituting defects detected in the user data area, and the tracking direction of the user data area and the use direction of the spare area are: A pickup for recording / reproducing data in association with the information recording media opposite to each other;
When data is recorded in a continuous replacement cluster in the spare area for replacing a continuous defective cluster detected in the user data area, the first replacement in the tracking direction among the continuous replacement clusters And a control unit that controls the pickup so as to record data from the cluster. In an apparatus for reproducing data from an information recording medium,
Including a user data area for recording user data, and a spare area for substituting defects detected in the user data area, and the tracking direction of the user data area and the use direction of the spare area are: A pickup for recording / reproducing data in association with the information recording media opposite to each other;
When reading data from a continuous replacement cluster in the spare area that replaces a continuous defective cluster detected in the user data area, data from the first replacement cluster in the tracking direction among the continuous replacement clusters And a control unit that controls the pickup so as to read the image. Including a user data area for recording user data, and a spare area for substituting defects detected in the user data area, and the tracking direction of the user data area and the use direction of the spare area are: In a method of recording data on information recording media opposite to each other,
When data is recorded in a continuous replacement cluster in the spare area for replacing a continuous defective cluster detected in the user data area, the first replacement in the tracking direction among the continuous replacement clusters A recording method comprising recording data from a cluster. Including a user data area for recording user data, and a spare area for substituting defects detected in the user data area, and the tracking direction of the user data area and the use direction of the spare area are: In a method of reproducing data from information recording media opposite to each other,
When reproducing data from a continuous replacement cluster in the spare area that replaces a continuous defective cluster detected in the user data area, from the first replacement cluster in the tracking direction among the continuous replacement clusters A reproduction method comprising the step of reproducing data.

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