JP2009230830A - Information recording medium, and information recording/reproducing method and information recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, in an alternate recording to assign an area in a user data area as the alternating end, such as a pseudo overwrite in a write-once type optical disk, when the assigned alternating end is defective, the area in a spare area is further assigned, but the alternating end of the area in the initially assigned user data area is not assigned, thereby the defective area is left alone in the user data area. <P>SOLUTION: An area 2 is assigned for alternation with an area 1. When the area 2 is defective, an area 3 is assigned for alternation of the area 1, and also the area 3 (or area 4) is assigned for alternation of the area 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording method and a recording apparatus for an information recording medium having a defect management function, and is particularly effective for an optical disc drive having an alternate recording function such as a pseudo-overwrite in a write-once optical disc such as a BD-R. is there.

  In recent years, large-capacity exchangeable information recording media and disk drive devices that handle them have been widely used.

  As a conventional information recording medium having a large capacity and exchangeable, an optical disk such as a DVD or a Blu-ray Disc (hereinafter also referred to as BD) is well known. An optical disc drive device is a device that performs recording and reproduction by forming minute pits on an optical disc using laser light, and is suitable for information recording that can be exchanged with a large capacity. As a laser beam, a red laser is used as a DVD, and a blue laser having a shorter wavelength than that of a red laser is used as a laser beam. As a result, the BD has a higher recording density and a higher capacity than a DVD.

  FIG. 1 is an area configuration diagram of a general optical disc. A disk-shaped optical disk 1 has a large number of tracks 2 formed in a spiral shape, and each track 2 has a large number of finely divided blocks 3 formed therein.

  Here, the width (track pitch) of the track 2 is, for example, 0.32 μm in BD. The block 3 is a unit for error correction, and is the minimum unit for recording and reproducing operations. For example, in the case of DVD, the size is 1 ECC (size: 32 Kbytes), and in the case of BD, the size is 1 cluster (size: 64 Kbytes). For example, 1 ECC = 16 sectors and 1 cluster = 32 sectors.

  It should be noted that all references to cluster in the text below have the same meaning as block 3 on the BD.

  FIG. 2 is a data structure diagram of a write-once optical disc that has one recording layer and can be recorded only once.

  The optical disc 1 is roughly divided into a lead-in area 4, a data area 5, and a lead-out area 6.

  The data area 5 includes a user data area 15 and a spare area 16 (more precisely, a spare area 16a and a spare area 16b).

  The user data area 15 is an area where arbitrary information can be recorded by the user, such as real-time data such as music and video, and computer data such as text and database.

  The spare area 16 is a replacement area in which data is recorded instead of a certain block 3 in the user data area 15. For example, when a defective block is detected in the user data area 15, the replacement area of the block is stored. It is an area used as In this figure, one spare area 16 exists on the inner circumference side of the data area 5 (that is, the spare area 16a on the lead-in area 4 side) and one on the outer circumference side (that is, the spare area 16b on the lead-out area 6 side). As an example. Hereinafter, the spare area 16a and the spare area 16b are collectively referred to as a spare area 16.

  The lead-in area 4 is an area located on the inner circumference side of the data area 5 in the radial direction of the optical disc 1, and the lead-out area 6 is located on the outer circumference side of the data area 5 in the radial direction of the optical disc 1. It is an area to do. These areas include areas for recording management information related to the optical disc 1, areas for adjustment (learning) such as recording power, and the like, as well as areas for preventing overrun of an optical pickup (not shown). But there is.

  The lead-in area 4 includes a first defect management area 10 (hereinafter also referred to as DMA1), a second defect management area 11 (hereinafter also referred to as DMA2), and a temporary defect management area 14 (hereinafter referred to as TDMA14). Also described.).

  DMA1, DMA2, and TDMA14 are areas for recording disc management information such as the data structure of the optical disc 1 and positional information related to defects and replacement.

  Here, the TDMA is an area unique to a write-once optical disc having a defect management function that does not exist in a rewritable optical disc, and the state of the disc that changes in the process of recording and reproduction on a write-once optical disc that can be recorded only once. This is an area for temporarily recording management information indicating information (for example, information related to a defect position or a recorded end position). The TDMA area can be secured not only in the lead-in area 4 but also in the spare area 16, for example.

  The lead-out area 6 includes a third defect management area 12 (hereinafter also referred to as DMA3) and a fourth defect management area 13 (hereinafter also referred to as DMA4).

  Both DMA3 and DMA4 are areas for recording disc management information such as the data structure of the optical disc 1 and positional information regarding defects and replacement.

  The outer periphery test area 21 is an area prepared for adjustment (learning) of the optical disk drive device, and can be used for adjustment of recording power, for example, similarly to the inner periphery test area 20.

  Here, the DMA is generally a defect management area, but it can be provided with various information (disk management information) related to the disc in addition to the defect management information. This area is also called a disc management area.

  Here, DMA1 to DMA4 are arranged at predetermined positions on the optical disc 1, respectively, and the same information is multiplexed and recorded on all of DMA1 to DMA4. This is in preparation for the case where DMA1 to DMA4 themselves are affected by a defect. For example, even if there is a DMA that cannot be correctly played back, if any DMA can be played back correctly, the defect management information can be acquired. This is because of this. These area configurations have the same configuration and size as a rewritable optical disc. In the case of a write-once optical disc, for example, recording is performed only once in a process called finalization in which the disc is in a state in which no additional recording is possible (only reproduction is permitted) (For example, Patent Document 1).

  The DMA1 to DMA4 and the TDMA14 have a disk definition structure 30 (hereinafter also referred to as DDS 30) and a defect list 31 (hereinafter also referred to as DFL 31).

  The DFL 31 includes a header 40, zero or more defect entries 41, and an anchor 42.

  The header 40 includes information such as the number of defect entries 41 that is the number of defect entries 41 included in the DFL 31 and update number information that is the number of times the DFL 31 is updated.

  The defect entry 41 is mainly information related to the position information of the defective block and the replacement block. For example, the defect entry 41 is replacement source information 50 which is the position information of the defective block detected in the user data area 15 and the replacement destination of the defective block. The replacement destination information 51 which is the position information of the replacement block in the spare area 16 is included. It should be noted that even if a pseudo-overwrite (details will be described later) that makes it appear that data has been rewritten on a write-once optical disc is registered as a defect entry 41, strictly speaking, the replacement source information 50 is The replacement source block position information and replacement destination information 51 in replacement recording not limited to a defective block are position information of a replacement block that is not limited to the spare area 16 (for example, in the user data area 15). The defect entry 41 is not only position information related to the defect but also position information related to the defect / alternate recording. The replacement source information 50 and the replacement destination information 51 included in the replacement source information 50 and the replacement destination information 51 of the defect entry 41 are generally represented by physical addresses called PBA (details will be described later). The defect entry 41 is not only provided with the direct pointer information that connects the replacement source and replacement destination indicating that replacement recording has occurred, but also indicates that the defect is simply a defect (having only the position information of the defective block). There are several types (attributes). When the direct pointer information that connects the replacement source and the replacement destination indicating that the replacement recording has occurred is registered in the DFL 31 as the defect entry 41, data writing to the replacement source area and data from the replacement source area are performed. All reading is performed on the replacement area.

  The DDS 30 includes DFL head position information indicating the arrangement position of the DFL 31 and the like.

  Note that the DMA1 to DMA4 and the TDMA14 may include information such as recording status information such as a recording start position and a recording end position on the disc in addition to the DDS 30 and the DFL 31.

  3 and 4 are explanatory diagrams for explaining the defect management function in the write-once optical disc. Here, a cross in the figure indicates a defective block. The LBA is a logical address (Logical Block Address) assigned to a logical space that is an area accessible by the user. The PBA is a real address on the optical disk, that is, a physical address (Physical Block Address). It is. The maximum size of the LBA is the size of the user data area 15. Generally, an LBA is assigned to a PBA in the user data area 15 on a one-to-one basis. However, when a replacement recording occurs due to a defect or the like, an LBA is assigned to the replacement recording destination PBA. It will be. NWA indicates the next recordable address (generally LBA) in a write-once optical disc that performs continuous recording in a predetermined area. Since this is the next recordable position on the write-once optical disc, the position indicated by NWA is always an unrecorded area.

  FIG. 3A shows a state of the write-once optical disc after data having a size of 100 h sectors are continuously recorded from the position of LBA: 0 h.

  Here, 100h represents 100 in hexadecimal notation (256 in decimal notation). When recording of LBA: 0 to 100h sectors is performed, the NWA that is the next recordable position becomes 100h.

  FIG. 3B shows the state of the write-once optical disc when data having a size of 20 h sector is continuously recorded from the position of LBA: 100 h indicated by NWA, that is, following FIG. 3A. Since block 3 of LBA: 100h (PBA: 120100h) to be recorded is a defective block, recording to that block fails. In this case, block 3 in spare area 16 (block 3 of PBA: 100000h in the example shown in the figure) is assigned as a replacement area for the defective block, and is recorded in this area by replacement. When data recording to the replacement destination is successful, a defect entry 41 that is information related to replacement recording is registered in the DFL 31. The defect entry 41 includes replacement source information 50 representing the replacement source head position information (PBA) and the like, and replacement destination information 51 representing the replacement destination head position information (PBA) and the like. Pointer information. In this example, the replacement source is the block 3 of PBA: 120100h, and the replacement destination is the block of PBA: 100000h, so the defect entry 41 is as shown in the figure.

  As a result, the block 3 of PBA: 120100h originally corresponding to the position of LBA: 100h is recorded alternately, and the block 3 of PBA: 100000h becomes the block 3 corresponding to LBA: 100h.

  FIG. 4 is also an explanatory diagram for explaining the defect management function in the write-once optical disc, but is different from FIG. 3 in that the block 3 of PBA: 100000h in the spare area 16 is also a defective block.

  FIG. 4A is the same as FIG.

  FIG. 4B also shows the state of the write-once optical disc when FIG. 4A is continued, that is, when data having a size of 20 h sectors is continuously recorded from the position of LBA: 100 h indicated by the NWA, as in FIG. Is shown. Since block 3 of LBA: 100h (PBA: 120100h) to be recorded is a defective block, recording to that block fails. In this case, block 3 in spare area 16 (block 3 of PBA: 100000h in the example shown in the figure) is assigned as a replacement area for the defective block, and is recorded in this area by replacement. However, since the block 3 with PBA: 100000h allocated as the replacement destination is also a defective block, replacement recording is further performed on the next block 3 in the spare area 16, that is, the block 3 with PBA: 100020h. Then, when the data recording to the replacement destination is successful, the defect entry 41 which is information regarding the replacement recording is registered in the DFL 31 as in FIG. Since the defect entry 41 is direct pointer information, the replacement source information 50 is a position where a recording request is received, that is, PBA: 120100h, and the replacement destination information 51 is a position where replacement recording is finally performed, that is, PBA: 100020h. Become. Therefore, LBA: 100h corresponds to block 3 of PBA: 100020h.

  At this time, the information (defect entry 41) about the block 3 of PBA: 100000h which was the defective block first assigned as the replacement destination is not necessarily registered in the DFL 31. More specifically, it may be registered as a defect entry 41 that simply indicates a defect, but is not registered as a defect entry 41 that indicates that replacement recording has occurred. This is because the defect entry 41 is direct pointer information. Furthermore, since this block 3 is an invalid block in the spare area 16, it is an area to which no LBA space is allocated. Therefore, access to data from the user does not occur, and it can be said that there is no problem even if it is not registered in the DFL 31 in particular.

  In recent years, in a recordable optical disc having a defect management function or a replacement recording function, it is called pseudo-overwrite (hereinafter also referred to as POW) that makes it appear as if data is pseudo-overwritten using these functions. The function is considered (for example, patent document 2).

  FIG. 5 is an explanatory diagram for explaining the POW process in the write-once optical disc. POW is a function that applies the replacement recording function due to defects described in FIGS. 3 and 4, and a user data area indicated by the NWA in response to an overwrite recording request for an already recorded area in a write-once optical disc. The next recordable area in 15 is assigned as a replacement destination, replacement recording is performed to the replacement destination, the block 3 requested to be overwritten is the replacement source information 50, and the assigned replacement destination is the replacement destination information 51. Is registered in the DFL 31. In other words, it is like defect replacement recording in which the replacement recording destination is assigned in the user data area 15.

  FIG. 5A shows the state of the write-once optical disc after continuous recording of 100 h sector size data from the position of LBA: 0h. When recording of LBA: 0 to 100h sectors is performed, the NWA that is the next recordable position becomes 100h.

  FIG. 5B shows the state of the write-once optical disc after pseudo-overwrite (POW) recording of data having a size of 20 h on the block 3 of LBA: 0 h that has already been recorded. In response to the overwrite request to the recorded area, block 3 of LBA: 100h (PBA: 120100h) indicated by NWA in the user data area 15 is assigned as a replacement destination and is recorded in replacement there. When data recording to the replacement destination is successful, a defect entry 41 that is information related to replacement recording is registered in the DFL 31. In the defect entry 41 registered in this case, the replacement source information 50 is the position where the recording request is received, that is, PBA: 120000h, and the replacement destination information 51 is the position where replacement recording is performed, that is, PBA: 120100h. As a result, LBA: 0h corresponds to block 3 of PBA: 120100h.

It should be noted that the block of PBA: 120100h used as the replacement destination is an area in the user data area 15 unlike the case of defect replacement. That is, the LBA is also assigned to the block 3 itself assigned as the replacement destination of the POW recording. In this example, LBA: 100h is originally an LBA corresponding to PBA: 120100h. However, as a result of performing POW, LBA: 0h also becomes PBA: 120100h, and as a result, two (plural) LBAs (in this case, LBA: 0h) for the same PBA (PBA: 120100h in this example) And LBA: 100h) is assigned to the POW process.
JP 2005-056542 A JP-T-2006-521660

  As described above, in POW, in response to a pseudo overwrite request to a recorded area, replacement recording is performed in which an area in the user data area 15 to which an LBA is originally allocated is assigned as a replacement destination.

  If the replacement block in the user data area 15 assigned as the replacement destination of the POW record is a defective block, the block 3 in the spare area 16 is the same as the case shown in FIGS. As a replacement destination, defect replacement recording is performed.

  FIG. 6 is an explanatory diagram when the replacement block of POW recording is a defective block. Assume that block 3 of PBA: 120100h corresponding to LBA: 100h is a defective block.

  FIG. 6A is the same as FIG. The state of the write-once optical disc after continuous recording of 100 h sector size data from the position of LBA: 0 h is shown. When recording of LBA: 0 to 100h sectors is performed, the NWA that is the next recordable position becomes 100h.

  FIG. 6B also shows the state of the write-once optical disk after pseudo-overwrite (POW) recording of data having a size of 20 h to the block 3 of LBA: 0 h that has already been recorded, as in FIG. Is shown. In response to the overwrite request to the recorded area, block 3 of LBA: 100h (PBA: 120100h) indicated by NWA in the user data area 15 is assigned as a replacement destination and is recorded in replacement there. However, in this example, since the block 3 of PBA: 120100h pointed to by the NWA assigned as the replacement destination is a defective block, data recording to this block 3 fails. In this case, as in the case of FIGS. 3 and 4, the block 3 in the spare area 16 (PBA: 300000h block 3 in the example shown in the figure) is allocated as a replacement area for the defective block, and the replacement recording is performed in this area. When data recording to the replacement destination is successful, a defect entry 41 that is information related to replacement recording is registered in the DFL 31 as in FIG.

  Since the defect entry 41 is the direct pointer information of the replacement source position and the replacement destination position as described above, the replacement source information 50 is the position where the recording request is received, that is, PBA: 120,000h corresponding to LBA: 0h. The replacement destination information 51 is finally the replacement recorded position, that is, PBA: 100000h. Therefore, LBA: 0h corresponds to block 3 of PBA: 100000h.

  At this time, the information (defect entry 41) about the block 3 of PBA: 120100h which was the defective block, which was first assigned as the replacement destination of the pseudo-overwrite recording, is not necessarily registered in the DFL 31. More specifically, it may be registered as a defect entry 41 that simply indicates a defect, but is not registered as a defect entry 41 that indicates that replacement recording has occurred. This is because the defect entry 41 is direct pointer information.

  However, unlike the case shown in FIG. 4, the block 3 of PBA: 120100 is a block in the user data area 15 to which the LBA space is allocated. PBA: 120100h corresponds to a block of LBA: 100h. Therefore, a defective block is left in an area where data access from the user occurs.

  More specifically, when this write-once optical disc is read (reproduced) via file system information for managing the recording position of data, the block 3 of LBA: 100h corresponding to PBA: 120100h Since valid user data is not recorded and a block of PBA: 100000h is assigned to LBA: 0h, access to block 3 of PBA: 120100h does not occur.

  However, for example, in a tool that performs full disk reproduction that directly copies data of a write-once optical disk on which private video data is recorded to another information recording medium, the LBA size indicated by the logical space is equal to the LBA size. Data may be read (reproduced) continuously. In such a case, the block 3 of PBA: 120100h corresponding to LBA: 100h is also read, but because it is a defective block, there is a case where data reading fails and copying fails. .

  The information recording method of the present invention is an information recording method for recording data on an information recording medium, in which a step of assigning a region 2 for replacement to a region 1 and a case where the region 2 is defective Allocating the area 3 for the replacement of the area 1 and allocating the area 3 for the replacement of the area 2, thereby achieving the above object.

  The information recording medium includes a user data area for recording user data, or a data area composed of the user data area and a spare area that can be used as a replacement destination of the user data area. It may be an area in the user data area.

  The information recording method of the present invention is an information recording method for recording data on an information recording medium, in which a step of assigning a region 2 for replacement to a region 1 and a case where the region 2 is defective Allocating region 3 for replacement of region 1 and allocating region 4 for replacement of region 2, thereby achieving the above object.

  The information recording medium includes a user data area for recording user data, or a data area composed of the user data area and a spare area that can be used as a replacement destination of the user data area. It may be an area in the user data area.

  The area 4 is an area in the user data area, and may be a recorded area located near the area 2 where data is normally recorded.

  The area 4 may be an area that is not an area in the data area.

  An information recording apparatus according to the present invention is an information recording apparatus for recording data on an information recording medium, and means for assigning an area 2 to the area 1 for replacement, and when the area 2 is defective. And means for allocating the area 3 for the replacement of the area 1 and allocating the area 3 for the replacement of the area 2, thereby achieving the above object.

  The information recording medium includes a user data area for recording user data, or a data area composed of the user data area and a spare area that can be used as a replacement destination of the user data area. It may be an area in the user data area.

  An information recording apparatus according to the present invention is an information recording apparatus for recording data on an information recording medium, and means for assigning an area 2 to the area 1 for replacement, and when the area 2 is defective. And means for allocating the area 3 for the replacement of the area 1 and allocating the area 4 for the replacement of the area 2, thereby achieving the above object.

  The information recording medium includes a user data area for recording user data, or a data area composed of the user data area and a spare area that can be used as a replacement destination of the user data area. It may be an area in the user data area.

  The area 4 is an area in the user data area, and may be a recorded area located near the area 2 where data is normally recorded.

  The area 4 may be an area that is not an area in the data area.

  The information recording medium of the present invention is an information recording medium on which data is recorded / reproduced, and the same area 3 is assigned as a replacement destination of areas 1 and 2 which are at least two different areas. The above objective is achieved.

  The information medium includes a user data area for recording user data, or a data area composed of the user data area and a spare area that can be used as a replacement destination of the user data area. The area 2 may be an area in the user data area.

  The information reproducing method of the present invention is an information reproducing method for reading data from an information recording medium, wherein the information recording medium includes a user data area for recording user data, or the user data area, A data area comprising a spare area that can be used as a replacement destination of the user data area is provided, and when the area allocated for replacement is not included in the data area, data is read from the information recording medium First, a step of handling predetermined data as read data is provided, whereby the above object is achieved.

  The information reproducing apparatus of the present invention is an information reproducing apparatus that reads data from an information recording medium, and the information recording medium includes a user data area for recording user data, or the user data area, A data area comprising a spare area that can be used as a replacement destination of the user data area is provided, and when the area allocated for replacement is not included in the data area, data is read from the information recording medium First, a means for handling predetermined data as read data is provided, whereby the above object is achieved.

  In a recording method in which a user data area 15 where data access from a user occurs is assigned as a replacement destination of a certain area, even if the area in the user data area 15 assigned as a replacement destination is defective, that area The write-once optical disc on which private video data is recorded is registered in the defect list 31 with the defect entry 41 assigned the replacement destination for the area that was the defective area assigned as the replacement destination. Even when a tool that reproduces the entire disk surface is used to directly copy the data to another information recording medium, it is possible to prevent data reading failure and copying failure.

  Further, by controlling the replacement destination assigned to the area of the user data area 15 which was the defective area assigned as the replacement destination, the access performance at the time of reproduction when using the above-described tool is simultaneously improved. I can do it.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
(1) Device Configuration FIG. 7 shows a configuration of the optical disc recording / reproducing device 100 according to the first embodiment of the present invention.

  The optical disc recording / reproducing apparatus 100 is connected to a host controller 170 (not shown) via an I / O bus. The host control device is, for example, a host computer.

  The optical disc recording / reproducing apparatus 100 includes a command processing unit 110 that processes a command from the host controller 170, a recording processing unit 120 that performs recording processing such as information recording to a specified address of the optical disc 1, and a designation of the optical disc 1. A reproduction processing unit 130 that performs a reproduction process such as reading information from the read address and the content reproduced from any of DMA1 to DMA4, the latest content of the DFL 31 in the optical disc 1 reproduced from the TDMA 14, or the optical disc 1 A DFL storage buffer 140 that stores the latest DFL 31 updated with recording, a data buffer 150 that temporarily stores recording data and reproduction data, and a control unit that controls the entire recording processing and reproduction processing including replacement recording 160.

  The control unit 160 includes an address conversion unit 161 that performs address conversion between LBA and PBA, a recording position determination unit 162 that determines a position where user data recording is to be performed next, and a replacement recording position when replacement recording is necessary. Replacement record position determination unit 163 to be determined, defect entry generation unit 164 that generates a defect entry 41 in accordance with defect detection and replacement recording, and replacement information for temporarily storing various information related to replacement recording And a control memory 165.

  In the replacement information control memory 165, recording request position information 60 that is PBA related to the recording request position (that is, the position of the replacement source) in the replacement recording, and actual recording position information that is PBA related to the block 3 assigned as the replacement destination. 61, replacement failure position information 62 that is PBA related to the block 3 in the user data area 15 that has been assigned as a replacement recording destination but failed in replacement recording, and a POW recording flag indicating that pseudo-overwrite (POW) recording is in progress 63 etc. are included. The actual recording position information 61 indicates the recording destination PBA, and indicates the PBA corresponding to the NWA in the case of normal sequential recording, and the PBA in the spare area 16 in the case of defect replacement recording.

(2) Recording Process FIG. 8 is a flowchart for explaining the procedure of the recording process and the defect entry 41 registration process in the first embodiment of the present invention. In this flow, description will be made assuming that the information recording medium is a write-once optical disc. Although not specifically described, the information secured in the replacement information control memory 165 is described as being initialized with, for example, 0 data at the start of the flow.

  Step 801: The optical disc recording / reproducing apparatus 100 determines a recording request position. Specifically, the instruction processing unit 110 converts the recording position information (LBA) requested from the host controller 170 into a physical address (PBA) in the address conversion unit 161, and determines the recording request position. In the following description, the LBA and PBA corresponding to the requested recording position information are expressed as a recording request LBA and a recording request PBA, respectively. Normally, the host controller 170 also notifies the recording request size in addition to the recording position information. However, in the first embodiment of the present invention, the recording request size is one block (20h sector) for the sake of simplification. And

  Step 802: The recording position determination unit 162 determines whether or not the current recording is overwrite recording (POW recording), and more specifically, whether or not recording is accompanied by replacement recording in the user data area 15. Specifically, the recording position determination unit 162 determines whether or not the recording request LBA (or recording request PBA) is a recorded area. More specifically, in a track which is an area where a series of continuous recording is performed, sequential recording is performed if the recording requested position matches NWA which is a position where recording is performed next, and POW recording is performed if the position is between the head of the track and NWA. Judge. Then, the determination result is stored as a POW recording flag 63, for example, TRUE (1) for POW recording, and FALSE (0) otherwise. That is, the POW recording flag 63 is information indicating whether or not recording accompanied with replacement recording in the user data area 15 is being performed. If it is determined as POW recording, the recording position determination unit 162 simultaneously determines that this recording requires replacement recording. Note that the value of the POW recording flag 63 is merely an example, and any value can be used as long as it is a value that can distinguish true / false.

  Step 803: If overwriting (POW recording) is determined in step 802, the processing of step 804 to step 806 is performed, and if it is determined normal recording (sequential recording), the processing of step 807 is performed.

  Step 804: The recording position determination unit 162 stores the recording request PBA as the recording request position information 60.

  Step 805: The replacement recording position determination unit 163 determines the replacement recording position. That is, area 2 is assigned to area 1 for replacement. Specifically, when the recording position determination unit 162 determines that replacement recording is necessary, the replacement recording position determination unit 163 performs next recording on the track including the recording request LBA (or recording request PBA) in the user data area 15. The position (PBA) of the unrecorded area pointed to by the position NWA is determined as the POW replacement recording destination and stored as the actual recording position information 61. In this example, the NWA of the track including the recording request LBA (or the recording request PBA) has been described as an alternative recording destination. However, when there are a plurality of tracks on the optical disc 1, the POW replacement recording destination is used. NWAs assigned as are not necessarily the same track. Note that the recording request PBA that is the recording request position and the PBA of the unrecorded area pointed to by the NWA assigned as the POW replacement destination are not the same. In this example, the area indicated by the recording request PBA corresponds to the area 1, and the unrecorded area at the position (PBA) pointed to by the NWA determined as the POW replacement recording destination corresponds to the area 2.

  Step 806: The defect entry generation unit 164 generates a new defect entry 41 along with the overwrite recording (POW recording). Specifically, the defect entry generation unit 164 generates a new defect entry 41 using the PBA indicated by the recording request position information 60 as the replacement source information 50 and the PBA indicated by the actual recording position information 61 as the replacement destination information 51. Register in the storage buffer 140. At this time, if the defect entry 41 having the same PBA as the PBA indicated by the recording request position information 60 exists in the DFL 31 stored in the DFL storage buffer 140, the replacement destination information 51 in the defect entry 41 is Update with actual recording position information 61. Note that, at this time, a defect entry 41 having the same PBA as the PBA indicated by the recording request position information 60 exists, for example, when POW recording has been performed before for the PBA indicated by the recording request position information 60 and so on.

  Step 807: In the case of normal recording, the recording position determination unit 162 stores the recording request PBA as actual recording position information 61.

  Step 808: The controller 160 performs recording on the optical disc 1. Specifically, the control unit 160 instructs the recording processing unit 120 to perform data recording for a specified size (in this example, 1 block: 20h sector) from the PBA indicated by the actual recording position information 61, The recording processing unit 120 records data on the optical disc 1.

  Step 809: The control unit 160 determines whether or not the recording in step 808 is successful. Specifically, the control unit 160 reads out the recording data from the area where recording was performed in step 808 using the reproduction processing unit 130, and determines whether or not the recording was successful. If the recording is successful, step 815 is determined. If the recording fails, it is determined that the PBA block 3 indicated by the actual recording position information 61 is defective, and the processing of step 810 to step 814 is performed.

  Step 810: In the case of defect detection by alternate recording of POW recording, the processing of Step 811 and Step 812 is performed, and further, the processing of Step 813 and Step 814 is performed regardless of POW recording. Specifically, when the POW recording flag 63 is TRUE (1), the control unit 160 performs the processing of Step 811 and Step 812, and then performs the processing of Step 813 and Step 814. In the case of (0), the processing of step 811 and step 812 is not performed.

  Step 811: The location information where the replacement recording has failed is stored. Specifically, the control unit 160 stores, in the replacement failure position information 62, the position where the replacement recording in the POW recording has failed, that is, the PBA stored in the actual recording position information 61. Since it is the replacement destination PBA of the POW recording, the replacement failure position information 62 is the PBA in the user data area 15.

  Step 812: Release the POW recording state. Specifically, the control unit 160 clears the POW recording flag 63. In the first embodiment of the present invention, it is assumed that the POW recording state is canceled when the recording process to the area allocated as the POW replacement destination is completed.

  Step 813: The replacement recording position determination unit 163 determines the replacement recording position. That is, when the region 2 is defective, the region 3 is allocated for replacement of the region 1. Specifically, the replacement recording position determination unit 163 selects the block 3 in the spare area 16 as a further replacement destination of the defective block indicated by the actual recording position information 61 assigned as the POW recording replacement destination, and uses this as a new replacement location. The actual recording position information 61 is updated as the replacement recording position. In this example, the area indicated by the recording request PBA is in area 1, the area that was the defective block assigned as the POW replacement destination is in area 2, and the area in the spare area 16 selected as the new replacement recording position. Corresponds to region 3. Region 3 is a region different from region 1 and region 2.

  Step 814: The defect entry generation unit 164 generates a defect entry 41 along with the defect replacement recording. Specifically, if there is a defect entry 41 having the same PBA as the PBA indicated by the recording request position information 60 in the DFL 31 stored in the DFL storage buffer 140, the defect entry generation unit 164 stores the defect entry 41 in the defect entry 41. The replacement destination information 51 is updated with the actual recording position information 61 currently held. As a case where there is a defect entry 41 having the same PBA as the PBA indicated by the recording request position information 60 at this time, for example, there is a case where the defect entry 41 is generated along with the POW recording in step 806. If not, a new defect entry 41 is generated in which the PBA indicated by the currently requested recording request position information 60 is the replacement source information 50 and the PBA indicated by the actual recording position information 61 is the replacement destination information 51, and the DFL is generated. Register in the storage buffer 140. Thereafter, the process returns to step 808.

  Step 815: It is determined whether valid data is stored in the replacement failure position information 62. Specifically, when the value of the replacement failure position information 62 is not the initial value (0), the control unit 160 determines that valid data is stored, and performs the process of step 816.

  Step 816: A new defect entry 41 is generated. That is, area 3 is allocated for replacement of area 2. Specifically, the defect entry generation unit 164 replaces the PBA stored in the replacement failure position information 62 with the replacement source information 50 and the PBA indicated by the actual recording position information 61 in which the position where replacement recording was successful is stored. A defect entry 41 having information 51 is newly registered in the DFL storage buffer 140. Since the value stored in the replacement failure position information 62 is the PBA in the user data area 15 assigned as the replacement destination of the POW recording as described in Step 811, the defect entry including the same PBA as this PBA is used. 41 does not exist in the DFL storage buffer 140 (DFL 31) at this time. In this example, the area indicated by the replacement failure position information 62 assigned as the POW replacement destination corresponds to the area 2, and the area indicated by the actual recording position information 61 that is the position where the replacement recording has succeeded corresponds to the area 3.

  Note that even if the processing corresponding to step 815 and step 816 is performed after step 811 or step 812, the same effect can be obtained.

  The recording process is completed by the above procedure.

  FIG. 9 is an explanatory diagram showing the state of a write-once optical disc when POW recording is performed according to the flow shown in FIG. As in the case of FIG. 6, it is assumed that block 3 of PBA: 120100h corresponding to LBA: 100h used as a replacement block for POW recording is a defective block.

  FIG. 9A shows a state before POW recording, which is the same as FIG. 6A. The state of the write-once optical disc after continuous recording of 100 h sector size data from the position of LBA: 0 h is shown. The next recordable position NWA is 100h.

  FIG. 9B shows the state of the write-once optical disc after pseudo-overwrite (POW) recording of data having a size of 20 h on the block 3 of LBA: 0 h that has already been recorded, as in FIG. Is shown. In response to the overwrite request to the recorded area, block 3 of LBA: 100h (PBA: 120100h) indicated by NWA in the user data area 15 is assigned as a replacement destination and is recorded in replacement there. However, in this case, since block 3 of PBA: 120100h pointed to by the NWA assigned as the replacement destination is a defective block, data recording to this block 3 fails, and block 3 (see FIG. In the example, block 3) of PBA: 100000h is allocated and is recorded alternately in this area. When data recording to the replacement destination is successful, two new defect entries 41 are registered in the DFL 31. One is the defect entry 41 of the position where the recording request is received as the replacement source information 50, that is, the PBA corresponding to LBA: 0h: 120,000h, and the position finally recorded as replacement destination information 51, that is, PBA: 100000h. The other is the position that was assigned as the POW recording replacement destination as the replacement source information 50 but was defective, that is, PBA: 120100h, and the position that was finally recorded as replacement destination information 51, that is, PBA: 100000h. The defect entry 41 of FIG. As a result, both LBA: 0h and LBA: 100h correspond to block 3 of PBA: 100000h.

  Here, consider a state where the same PBA is assigned as a plurality of LBAs.

  FIG. 10 is an explanatory diagram showing the state of the information recording medium when two LBAs (logical spaces) are assigned to the same PBA.

  In the case of rewritable media, a state where a plurality of LBAs are assigned to the same PBA must not be created. This is because, as shown in FIG. 10 (2), different logical space positions viewed from the user become the same position in the information recording medium, so that the user overwrites data in block 3 of LBA: a (PBA: A). If the data of the block 3 of the PBA: S that is the replacement destination is updated, the data of the block 3 of the LBA: b (PBA: B) that is the block 3 in a completely different logical space is eventually rewritten. Because it becomes.

  However, in the case of a write-once optical disc, even if a plurality of LBAs are assigned to the same PBA, there is no problem as in the case of rewritable media. This is because, unlike a rewritable optical disk, a write-once optical disk cannot be overwritten and updated to the same PBA. Therefore, a plurality of LBA blocks 3 are assigned to a block 3 of the same PBA as shown in FIG. In the case where all the data are read from the plurality of LBAs, the same value is obtained. That is, in this case, the data read from the block 3 of LBA: a and the block 3 of LBA: b are all data recorded in the block 3 of PBA: S. That is, it can be said that the method shown in Embodiment 1 of the present invention is an effective method for an information recording medium having a write-once area such as a write-once optical disk.

  As described above, even if the block 3 in the user data area 15 assigned as the replacement destination of the POW recording is defective by the method shown in the first embodiment of the present invention, the defect entry 41 regarding the replacement destination of the defective block is also generated. In addition, since it is registered in the DFL 31, a defective block is not left in an area corresponding to a logical space where data access from the user occurs, and when reading (playback) is attempted via file system information. In addition, when data is read from a tool that directly copies the data on the write once optical disk to another information recording medium, the data is not read from the defective block, and the disk copy fails. The problem of doing can be prevented.

  Further, in order to register the defect entry 41 indicating the valid block 3 as the replacement destination information 51 in the DFL 31, for example, an optical disc recorded by the optical disc recording / reproducing apparatus 100 having the function shown in the first embodiment of the present invention is It also has a feature that it can be played back even on a playback device that does not have a function.

  In the first embodiment of the present invention, the example in which the PBA indicated by the actual recording position information 61 is used as the replacement destination information 51 of the newly registered defect entry 41 in step 816 has been described. The PBA to be performed may not be the actual recording position information 61. More specifically, if the block 3 that can normally read data is used as the replacement destination information 51, the same effect as that of the first embodiment of the present invention can be obtained. An example of these specific examples will be described in Embodiment 2 of the present invention.

(Embodiment 2)
(1) Device Configuration The configuration of the optical disc recording / reproducing device 100 according to the second embodiment of the present invention is the same as that described in the first embodiment of the present invention, and thus the description thereof is omitted.

(2) Recording Process The recording process in the second embodiment of the present invention is the same as that described in the first embodiment of the present invention except that the contents of the defect entry 41 generated in step 816 are different. Therefore, the description thereof is omitted. In this flow, description will be made assuming that the information recording medium is a write-once optical disc.

  Step 816: A new defect entry 41 is generated. That is, area 4 is allocated for replacement of area 2. Specifically, the defect entry generation unit 164 newly registers a defect entry 41 in the DFL storage buffer 140 with the PBA stored in the replacement failure position information 62 as the replacement source information 50 and any PBA as the replacement destination information 51. To do. In this example, the area indicated by the replacement failure position information 62 assigned as the POW replacement destination corresponds to the area 2, and any PBA registered as the replacement destination information 51 corresponds to the area 4. Area 3 and area 4 are different areas.

  FIG. 11 is a specific example regarding an arbitrary PBA registered as the replacement destination information 51.

  Any of these can obtain the same effects as those of the first embodiment of the present invention. FIG. 11 shows a case where POW recording is performed for LBA: a, and block 3 of LBA: b (PBA: B) assigned as the replacement destination is a defective block.

  FIG. 11 (Example 1) shows a case where the block 3 (for example, PBA: C) that has been normally recorded immediately before or near the block 3 (PBA: B) allocated as the POW replacement destination is used as the replacement destination information 51. is there. Specifically, the PBA: C described in this example is a block 3 that is normally recorded immediately before the defective PBA: B, that is, when an area is allocated as a POW replacement destination, It is block 3 immediately before the block that was pointing. The advantage of this example is that seek and disk rotation are performed in response to a playback request to LBA: b by assigning normal block 3 in the vicinity as LBA: b data that has no meaning even if it is played back By assigning, as the replacement destination area 51, an area where the access overhead factor such as waiting can be reduced as much as possible, the reading process from the PBA indicated by the actual replacement destination information 51, that is, the access process can be performed at high speed. It is.

  FIG. 11 (example 2) shows a case where the PBA of the block 3 in an area different from the data area 5 (for example, PBA: D in the lead-in area 4) is used as the replacement destination information 51. For example, a block 3 in which predetermined data is recorded, such as a block 3 in an area in which 0 data is always recorded, may be indicated. The merit of this example is that, when a defect entry 41 having an area not included in the data area 5 as the replacement destination information 51 is registered, the data reading process from the information recording medium is not actually performed. The data can be controlled in the optical disc recording / reproducing apparatus 100 such that the data (for example, 0 data) is read data. For example, the same control can be performed even if a value that does not exist on the information recording medium (not taken as PBA) such as 0 or FFFFFFFFh is entered as the replacement destination information 51. However, when a defect entry 41 having a different PBA value as the replacement destination information 51 is registered in the DFL 31 in the data area 5 as in this example, a playback apparatus that determines that the defect entry 41 is invalid is used. Care must be taken because it may exist.

  In the second embodiment of the present invention, an example in which a write-once optical disc is used as an information recording medium to be recorded has been described. However, when an area not included in the data area 5 is registered as the replacement destination information 51. In addition, the control of making predetermined data (for example, 0 data) read data without actually performing data reading processing from the information recording medium is an effective method even for rewritable media and the like. It is.

  In the first embodiment and the second embodiment of the present invention, it has been described that the spare area 16 exists as a defect replacement area for the user data area 15. For example, even if the user data area is used as the replacement destination of the defective block, the same effect can be obtained.

  In Embodiment 1 and Embodiment 2 of the present invention, when a block in the user data area 15 assigned as a replacement destination is defective, the spare area 16 is immediately assigned as the replacement destination to be assigned next. Although an example in which the data is used has been shown, further replacement recording may be performed on the user data area 16 before performing replacement recording on the spare area 16.

  In Embodiment 1 and Embodiment 2 of the present invention, for example, as shown in FIG. 8, at the time of actual recording processing, the block 3 in the logical space to which valid data is not allocated is replaced with the replacement source information 50. Although the method of registering the defect entry 41 in the DFL 31 is shown, for example, when the POW replacement destination is a defective block as described in the first embodiment of the present invention, valid data in the logical space A defect entry 41 having information indicating that no valid data is allocated is registered in the DFL 31 with an area to which no data is allocated as replacement source information 50, and at a predetermined timing (for example, at the time of finalizing a disk, for example) A method of uniquely assigning the same PBA as the replacement destination information 51 in the defect entry 41 is also effective. That is, when a tool that directly copies to another information recording medium as described above is targeted, valid data can be read as block 3 in the logical space before being used with such a tool. The idea of keeping it in a state is also effective.

  In the first embodiment of the present invention and the second embodiment of the present invention, the processing flow described in FIG. 8 is merely an example, and the procedure and sequence are not limited thereto. More specifically, at least step 805 and step 806, which are steps for assigning region 2 for replacement to region 1, and for replacement of region 1 when region 2 is defective. If step 313, step 814, and step 816, which are steps for assigning region 3 and assigning region 3 (or region 4) for replacement of region 2, are included, the effects of the present invention can be obtained. I can do it.

  In the first embodiment and the second embodiment of the present invention, the description has been given for the pseudo-overwrite recording process in the write-once optical disc. However, the present invention is not limited to the pseudo-overwrite, and no alternate recording occurs. This is an effective method for the replacement recording process using the logical space to which the LBA is allocated, specifically, the user data area 15 as the replacement destination. That is, unlike a normal defect replacement process in which replacement recording is performed on the spare area 16 that is not accessed from the host device unless replacement occurs, a user who can be accessed from the host device without replacement. In the replacement recording process in which the data area 15 is assigned as a replacement destination, when the replacement destination in the assigned user data area 15 is defective, it is assigned as a replacement destination in a replacement record of replacement to another area. The area in the user data area 15 in which the defect is a defect is also registered in the DFL 31 as the defect entry 41 in a form to which a replacement destination is assigned, so that the defective area is not left in the user data area 15 and the host apparatus thereafter Can be handled without causing a playback error.

  The information recording / reproducing method according to the present invention can be applied to an optical disc drive apparatus capable of recording / reproducing a recordable optical disc having a pseudo-overwrite function.

General optical disk area configuration diagram General optical disk data structure illustration Explanatory drawing about defect replacement recording by conventional technology Explanatory drawing about defect replacement record when defect replacement destination is defect by conventional technology Explanatory drawing about replacement recording by pseudo-overwrite according to the prior art Explanatory drawing about defect replacement recording when the replacement destination of pseudo-overwrite is a defect according to the prior art 1 is a block diagram of an optical disc recording / reproducing apparatus 100 according to Embodiment 1 of the present invention. The figure which shows the recording process and the defect entry 41 registration process procedure by Embodiment 1 of this invention Explanatory drawing regarding defect replacement recording when the replacement destination of pseudo-overwrite is a defect according to Embodiment 1 of the present invention Explanatory drawing when there are a plurality of defect entries 41 having the same PBA as replacement destination information 51 according to the first embodiment of the present invention Specific example explanatory diagram of defect entry 41 registered in DFL 31 according to the second embodiment of the present invention

Explanation of symbols

1 optical disc 2 track 3 block 4 lead-in area 5 data area 6 lead-out area 10, 11, 12, 13 DMA
15 User data area 16 Spare area 30 Disk definition structure (DDS)
31 Defect List (DFL)
40 Defect List Header 41 Defect Entry 42 Defect List Anchor 50 Replacement Source Information 51 Replacement Destination Information 60 Recording Request Position Information 61 Actual Recording Position Information 62 Replacement Failure Position Information 63 POW Recording Flag 100 Optical Disc Recording / Reproducing Device 110 Instruction Processing Unit 120 Recording Process Unit 130 reproduction processing unit 140 DFL storage buffer 150 data buffer 160 control unit 161 address conversion unit 162 recording position determination unit 163 replacement recording position determination unit 164 defect entry generation unit 165 replacement information control memory 170 I / O bus

Claims (16)

An information recording method for recording data on an information recording medium,
Assigning area 2 to area 1 for replacement;
An information recording method comprising: allocating an area 3 for replacement of the area 1 and allocating the area 3 for replacement of the area 2 when the area 2 is defective. The information recording medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
The information recording method according to claim 1, wherein the area 2 is an area in the user data area. An information recording method for recording data on an information recording medium,
Assigning area 2 to area 1 for replacement;
Allocating area 3 for replacement of area 1 and allocating area 4 for replacement of area 2 when the area 2 is defective. The information recording medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
4. The information recording method according to claim 3, wherein the area 2 is an area in the user data area. The area 4 is an area in the user data area,
5. The information recording method according to claim 4, wherein the recorded area is located in the vicinity of the area 2 where data is normally recorded. The information recording method according to claim 4, wherein the area 4 is not an area in the data area. An information recording apparatus for recording data on an information recording medium,
Means for allocating area 2 for replacement to area 1;
An information recording apparatus comprising: means for allocating the area 3 for replacement of the area 1 and allocating the area 3 for replacement of the area 2 when the area 2 is defective. The information recording medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
The information recording apparatus according to claim 7, wherein the area 2 is an area in the user data area. An information recording apparatus for recording data on an information recording medium,
Means for allocating area 2 for replacement to area 1;
An information recording apparatus comprising: means for allocating an area 3 for replacement of the area 1 and allocating an area 4 for replacement of the area 2 when the area 2 is defective. The information recording medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
The information recording apparatus according to claim 9, wherein the area 2 is an area in the user data area. The area 4 is an area in the user data area,
11. The information recording apparatus according to claim 10, wherein the information recording apparatus is a recorded area located in the vicinity of the area 2 where data is normally recorded. 11. The information recording apparatus according to claim 10, wherein the area 4 is not an area within the data area. An information recording medium on which data is recorded and reproduced,
An information recording medium characterized in that the same area 3 is allocated as a replacement destination of areas 1 and 2 which are at least two different areas. The information medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
14. The information recording medium according to claim 13, wherein the area 1 and the area 2 are areas in the user data area. An information reproducing method for reading data from an information recording medium,
The information recording medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
An information reproducing method comprising a step of handling predetermined data as read data without reading data from the information recording medium when an area allocated for replacement is not included in the data area. An information reproducing apparatus for reading data from an information recording medium,
The information recording medium is
User data area for recording user data,
Or a data area composed of the user data area and a spare area usable as a replacement destination of the user data area,
An information reproducing apparatus comprising means for handling predetermined data as read data without reading data from the information recording medium when an area allocated for replacement is not included in the data area.

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