KR20060017971A - Method of controlling spare area size of optical disc and method and apparatus for recording data using the same - Google Patents

Abstract

The present invention relates to a method of controlling a spare area of an optical disc, etc., and in the case of an optical disc to which at least one spare area is allocated, the spare area is newly renewed by expanding the spare area. When a cluster in the previous user data area included in the area is registered as defect management information and the size of the spare area is reduced, the spare area in the previous spare area included in the new user data area is reduced by reducing the spare area. Register the cluster as defect management information, and in performing the reduction of the spare area, the cluster already used for the replacement record among the clusters in the previous spare area to be included as the user data area is replaced with another spare area again. If recording is possible, performing a reduction of the cluster And characterized in that for, it becomes possible to do this through effective utilization of the spare area, which has the advantage of contributing to the improved performance of the entire optical disc.

Recording medium, optical disc, spare area, variable, control, allocation

Description

Method of controlling spare area of optical disc and method and apparatus for recording and reproducing optical disc using same {Method of controlling spare area size of optical disc and method and apparatus for recording data using the same}

1A and 1B are block diagrams illustrating a spare area variable method in a single-layer disc to which the present invention is applied.

2A to 2D are block diagrams illustrating a spare area variable method in a dual layer disk to which the present invention is applied.

3A to 3D are diagrams illustrating another spare area variable method in a dual layer disk to which the present invention is applied.

4A and 4B are structural diagrams and tables showing a method for registering defect management information when additional spare area allocation according to the present invention is performed.

5A and 5B are structural diagrams and tables showing a method for registering defect management information at the time of expanding a spare area according to the present invention;

6A and 6B are structural diagrams and tables showing a method for registering defect management information when reducing a spare area according to the present invention.

7A and 7B are structural diagrams and tables showing another method for registering defect management information when the spare area is reduced according to the present invention;                 

8 is an overall flowchart showing an optical disc spare area variable control method and a recording / playback method according to the present invention;

9 is a block diagram showing an optical recording and reproducing apparatus according to the present invention.

-Description of the main parts in the drawing-

20: recording and playback section 11: pickup

13 signal processing unit 14 servo

15: memory 16: microcomputer

12: control unit

The present invention relates to recording and reproducing of an optical disc, and more particularly, to a method of variably controlling the size of a spare area allocated to an optical disc, and a method and apparatus for recording and reproducing an optical disc using the same.

As a recording medium, an optical disc capable of recording a large amount of data is widely used. Recently, new high-density optical recording media, such as Blu-ray Discs (hereinafter referred to as "BDs"), which can record and store high-quality video data and high-quality audio data for a long time, have been developed. .

Blu-ray Disc (BD), the next-generation optical recording media technology, is a next-generation optical recording solution that can store data that significantly exceeds existing CDs and DVDs. Recently, technical specifications of the world standard have been established.

Various standards related to Blu-ray Discs (BD) have been prepared, including a rewritable Blu-ray Disc (BD-RE), followed by a write-once Blu-ray Disc (BD-R) and a playback-only Blu-ray Disc (BD-ROM). Various standards are being prepared for.

In particular, as a recordable Blu-ray disc, a BD-RE and a BD-R have a spare area in the disc for protection of data recorded or to be recorded. Recently, a spare area of the spare area has been provided. Variable use is under discussion.

However, in applying the variable utilization method of the spare area, a uniform control method has not yet been provided, which has been a problem in developing an optical recorder.

The present invention was created in view of the above circumstances, and provides a control method for allocating a spare area in an optical disc and variably changing the allocated spare area size. It is an object of the present invention to provide a recording and reproducing method and apparatus using the spare area.

In the optical disc spare area variable control method of the present invention for solving the above technical problem, in the case of an optical disc to which at least one spare area is allocated, the spare area is newly renewed by expanding the spare area. When a cluster in the previous user data area included in the area is registered as defect management information and the size of the spare area is to be reduced, the spare area in the previous spare area included in the new user data area is reduced by reducing the spare area. Register the cluster as defect management information, and in performing the reduction of the spare area, the cluster already used for the replacement record among the clusters in the previous spare area to be included as the user data area is replaced with another spare area again. Reduction of the cluster, if recording is possible It is characterized in that the performance is allowed.

In another optical disk spare area variable control method according to the present invention, when a spare area is allocated to an optical disc and the size of the spare area is to be reduced, a spare area is determined in determining the size of the spare area. Another spare area for checking the cluster size already used for the replacement recording among the clusters in the previous spare area to be newly included as the user data area by reduction, and for recording the replacement data again in the cluster used for the replacement recording. If the spare area does not exist, it is possible to reduce the spare area by the size of the cluster already used for the replacement recording.

In another optical disk spare area variable control method according to the present invention, in an optical disc in which a spare area adjacent to an end of a user data area is not allocated, a new spare area is allocated to the optical disc. A spare area is additionally allocated adjacent to the end of the area, and the cluster in the old user data area newly included as a spare area is registered as defect management information by the additional allocation of the spare area.

In the optical disk recording and reproducing method according to the present invention, in the recording and reproducing of an optical disk to which a spare area is allocated, it is checked whether there is a variable request of the spare area during an optical disk in-use state, and the variable request is determined. In case of additional allocation of spare area or expansion of spare area, the cluster included in the area extended to spare area is registered as defect management information. If the variable request is reduction of spare area, the size of spare area can be determined. According to the determined spare area reduction size, a cluster newly included in the user data area is registered as defect management information, and recording and reproduction are performed after the spare area is changed.

The optical recording and reproducing apparatus according to the present invention also includes an optical recording and reproducing unit 20 for reading data from or recording data from an optical disc, and a control unit 12 for receiving a user command and controlling the recording and reproducing unit. In the recording and reproducing apparatus, the control unit 12 checks whether there is a variable request of the spare area during an optical disc in-use state, and the variable request is an additional allocation of the spare area or an extension of the spare area. In the case, the cluster included in the area extending into the spare area is registered as the defect management information. When the variable request is the reduction of the spare area, the size of the spare area can be reduced, and according to the determined spare area reduction size, Register the cluster newly included in the user data area as defect management information, and record and play back after the spare area is changed. That is characterized in that for controlling the recording and playback section 20 performs.                     

Hereinafter, exemplary embodiments of an optical disc spare area variable control method according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, an optical disc will be described by taking a case of a Blu-ray Disc BD, but the technical concept of the present invention is obviously applicable not only to the Blu-ray Disc BD but also to other recording media. .

In addition, the terminology used in the present invention was selected as a general term widely used as possible, but in certain cases, the term is arbitrarily selected by the applicant, and in this case, since the meaning is described in detail in the corresponding description of the invention, the name of a simple term is used. It is intended that the present invention be understood as the meaning of the term.

In this context, the term " spare area " in the present invention is an auxiliary area allocated in a data area between a lead in area and a lead out area of an optical disc. In particular, in order to protect the data to be recorded or recorded in the optical disc, it means an area for sub-recording the data to be recorded or recorded in a defective cluster occurring in the user data area.

In addition, in the present invention, "cluster" means a recording unit having an error correction function used in a Blu-ray disc BD. The size of one cluster is 32 sectors in one cluster. 1 sector has a recording capacity of about 2048 bytes, and therefore, one cluster has a recording capacity of about 64 k bytes. Hereinafter, the present invention will be described using "cluster" as the minimum recording unit in the optical disc.

1A and 1B show an embodiment in which a spare area is variably changed in accordance with an assignment of an initial spare area in an optical disc having one recording layer to which the present invention is applied. Shows an embodiment in which the spare area is variably changed in accordance with the allocation of the initial spare area in the optical disc having two recording layers to which the present invention is applied.

In particular, the spare area is allocated in various ways according to the purpose of the disc standard, for example, in the Blu-ray disc of the present invention, as shown in Figure 1A-3D, the spare area allocated to the inner circumference of the disk (ISA; Inner Spare area) The spare area allocated to the outer periphery of the disc is called an outer spare area (OSA), and the inner spare area of the first recording layer (Layer 0) is used to distinguish the spare area existing for each recording layer. Is "ISA0", the outer spare area of the first recording layer (Layer 0) is "OSA0", the inner spare area of the second recording layer (Layer 1) is "ISA1", and the second recording layer (Layer 1) The outer spare areas of are named "OSA1", respectively.

In addition, the size of each spare area to be allocated may be preferably determined as follows, but is not limited thereto.

First, ISA0 has a fixed size of 2048 clusters, and for a single layer with one recording layer, OSA0 has a variable size of N * 256 clusters (0 <= N <= 64) and thus OSA0 is not assigned ( N = 0), or up to (N = 64) 64 * 256 clusters (about 1G bytes).                     

In the dual layer with two recording layers, OSA0 and OSA1 are allocated the same size but have variable sizes with N * 256 clusters (0 <= N <= 32), so OSA0 and OSA1 are not allocated respectively (N = 0), maximum (N = 32) 32 * 256 clusters (about 500M bytes). In addition, ISA1 is of variable size with L * 256 clusters (0 <= L <= 64), so ISA1 is either unallocated (L = 0) or maximum (L = 64) 64 * 256 clusters (approximately 1G bytes). Becomes

Therefore, the data area is composed of a user data area in which information desired by an actual user is recorded, and the spare area described above. If the spare area is not allocated, defect management using the spare area is not performed.

In this regard, the present invention refers to a case in which at least one spare area is initially allocated (when formatting) and at least one spare area is allocated (a spare area is initially allocated to perform defect management utilizing the spare area), and a disk is in use (in- The present invention relates to a variable control method of a spare area for allocating a spare area as needed in a use state, or for expanding or reducing an allocated spare area.

First, the addition of a new spare area or the expansion or reduction of an existing spare area is targeted to the spare area adjacent to the end of the user data area. In other words, file information for disk management such as file system information is recorded in the inner circumference of the disk, and since the disk is generally recorded from the inner circumference, in order to be less affected by the user data area by changing the spare area, the user data area is used. Variables at the end of will be preferred.                     

Therefore, a single layer disk having one recording layer is targeted for OSA0, and a dual layer disk having two recording layers is targeted for ISA1. However, in the case of the dual layer, the target may be different for each recording layer, which will be described later with reference to FIGS. 3A to 3D.

Second, as the spare area is changed in the disk in-use state, defect management information must be newly defined and registered. That is, there may be a case where the previous user data area is incorporated into the spare area (expansion or addition of spare area), and conversely, there may be a case where the previous spare area is incorporated into the user data area (reduce spare area). In all cases, it is necessary to register the change of defect management information. In connection with this, the change registration of defect management information will be described later in detail with reference to each case in Figs. 4A to 7B.

Third, there may be a case where the variation of the spare area is limited. Particularly, in the case of shrinking the spare area, if there is a cluster previously recorded for defect management in the spare area to be reduced (that is, the area incorporated into the user data area), the contents recorded in the cluster are replaced by another spare area. However, if other spare areas are not secured for alternative recording, the reduction of spare areas should be limited. That is, the present invention is characterized in that the spare area variable is controlled during the in-use state of the disk, so that data written in the spare area in the disk in-use state replaces the data recorded in the user data area. Because it is a substitute recording, it is necessary to protect it as normal data.                     

In this regard, if the spare area is not variable in the disk in-use state and the disk is newly formatted, all the data recorded in the user data area is also ignored, so the above limitation is not necessary. However, the spare area is different from the present invention in that the spare area can be freely reassigned.

1A and 1B show an embodiment in which the spare area is variably changed in accordance with the allocation of the initial spare area in the optical disc having one recording layer to which the present invention is applied. 1B is an example in which ISA0 / OSA0 are all allocated.

That is, according to the embodiment of Fig. 1A, since only the initial ISA0 is assigned to the disk, the method of varying the spare area while the disk is in use is to newly allocate OSA0, and the size of OSA0 to be allocated is N *. It is desirable to allocate variable sizes within 256 clusters (0 <= N <= 64).

In addition, according to the embodiment of Fig. 1B, since both the initial ISA0 and OSA0 are allocated to the disk, the method of changing the spare area during the use of the disk is to enlarge or reduce the OSA0 adjacent to the end of the user data area. In this case, since the size of the extended final OSA0 must be present in the aforementioned N * 256 cluster (0 <= N <= 64), if the first allocated OSA0 is assigned the maximum N = 64 value, it is no longer added. It is preferable that the expansion be limited, and in addition, when the spare area is reduced, it is impossible to reduce the spare area by the characteristics of the present invention, or the size of the spare area to be reduced may be limited. This will be described later in more detail with reference to FIGS. 6A to 7B.

2A to 2D illustrate an embodiment in which a spare area is variably changed in accordance with an allocation of an initial spare area in an optical disc having two recording layers to which the present invention is applied. 2B is an example in which ISA0 / OSA0 / OSA1 is allocated, FIG. 2C is an example in which ISA0 / ISA1 is allocated, and FIG. 2D is an example in which ISA0 / OSA0 / OSA1 / ISA1 are all allocated.

According to the embodiment of Fig. 2A, since only the initial ISA0 is assigned to the disk, the method of varying the spare area while the disk is in use is to newly allocate additional ISA1, and the size of the allocated ISA1 is the L * 256 cluster described above. It is preferred to assign a variable size within (0 <= L <= 64).

That is, in the case of the dual layer, the end of the end user data area becomes the inner area of the second recording layer Layer1, so only ISA1 needs to be additionally allocated.

Also, according to the embodiment of Fig. 2B, since the initial ISA0 / OSA0 / OSA1 is assigned to the disk, the method of changing the spare area while the disk is in use is to newly allocate additional ISA1, and the size of the allocated ISA1 is It is desirable to allocate a variable size within the aforementioned L * 256 cluster (0 <= L <= 64).

That is, in this embodiment as in Fig. 2A, in the case of the dual layer, the end of the end user data area becomes the inner area of the second recording layer Layer1, so only ISA1 should be additionally allocated.

Also, according to the embodiment of Fig. 2C, since the initial ISA0 and ISA1 are allocated to the disk, the method of varying the spare area during use of the disk is to enlarge or reduce the ISA1 adjacent to the end of the user data area. In this case, the size of the expanded final ISA1 must be present in the L * 256 cluster (0 <= L <= 64) described above, so if the already allocated ISA1 is assigned the maximum L = 64 value, it is no longer added. Preferably, the expansion should be limited.

Also, in the case of the embodiment of Fig. 2D, since all initial spare areas (ISA0, ISA1, OSA0, OSA1) are allocated to the disc, the method of varying the spare area during use of the disc is the same as the example of Fig. 2C. It means to enlarge or reduce the ISA1 adjacent to the end of the user data area. In this case, the size of the expanded final ISA1 must be present in the L * 256 cluster (0 <= L <= 64). If the originally assigned ISA1 was assigned a maximum value of L = 64, then further extensions should be restricted further.

For reference, FIGS. 2B and 2D show only examples in which OSA0 and OSA1 are simultaneously assigned the same size as a preferred example. However, when OSA0 and OSA1 are allocated to the same size at the same time or only one spare area (either OSA0 or OSA1) is allocated. It is obvious that the technical ideas of the present invention are equally applicable.

In addition, in the embodiments of FIGS. 2C and 2D, the reduction of the spare area may be impossible due to the characteristics of the present invention, or the size of the reduced spare area may be limited when the spare area is reduced.

3A to 3D illustrate an embodiment in which a spare area is variably changed in accordance with an allocation of an initial spare area in an optical disk having two recording layers to which the present invention is applied. 3B is an example in which ISA0 / OSA0 / OSA1 is allocated, FIG. 3C is an example in which ISA0 / ISA1 is assigned, and FIG. 3D is an example in which ISA0 / OSA0 / OSA1 / ISA1 are all allocated.

3A to 3D differ from the embodiment of Figs. 2A to 2D in that the spare area can be changed for each recording layer.

That is, according to the embodiment of Fig. 3A, since only the initial ISA0 is assigned to the disc, the method of varying the spare area during the use of the disc can further allocate OSA0 in the first recording layer Layer0. In the second recording layer (Layer1), it is possible to additionally allocate ISA1, and the size of OSA0 to be allocated is preferably assigned to a variable size in the aforementioned N * 256 cluster (0 <= N <= 32). In addition, the size of the additionally allocated ISA1 is preferably assigned to a variable size in the aforementioned L * 256 cluster (0 <= L <= 64).

In addition, according to the embodiment of Fig. 3B, since the initial ISA0 / OSA0 / OSA1 is assigned to the disk, the method of changing the spare area during the use of the disk is to enlarge or reduce the OSA0 in the first recording layer (Layer0). In this case, since the size of the extended final OSA0 must be present in the aforementioned N * 256 cluster (0 <= N <= 32), if the first allocated OSA0 is assigned the maximum value of N = 32, it is no longer added. Preferably, the expansion should be limited. In addition, in the second recording layer (Layer1), it is possible to additionally allocate new ISA1, and the size of the additionally allocated ISA1 is assigned to a variable size within the aforementioned L * 256 cluster (0 <= L <= 64). It is desirable to be.

In addition, according to the embodiment of Fig. 3C, since the initial ISA0 and ISA1 are allocated to the disc, the method of changing the spare area during the use of the disc can further allocate new OSA0 in the first recording layer Layer0. In addition, the size of OSA0 to be additionally allocated is preferably assigned to a variable size in the aforementioned N * 256 cluster (0 <= N <= 32). In the second recording layer Layer1, it is possible to enlarge or reduce ISA1. In this case, the size of the expanded final ISA1 must be present in the aforementioned L * 256 cluster (0 <= L <= 64). If the already assigned ISA1 has been assigned a maximum value of L = 64, then further extensions should be restricted.

In the case of the embodiment of Fig. 3D, since all initial spare areas (ISA0, ISA1, OSA0, OSA1) are allocated to the disc, the method of varying the spare area during use of the disc is performed in the first recording layer (Layer0). In the second recording layer (Layer1), it means to expand or shrink ISA1. In this case, the size of the expanded OSA0 must be present in the aforementioned N * 256 cluster (0 <= N <= 32). Since the size of the expanded last ISA1 must be in the L * 256 cluster (0 <= L <= 64) described above, if OSA0 and ISA1 are already allocated to the maximum value, further expansion should no longer be limited. It is preferable to.

In particular, in Figs. 3B and 3D, only the example in which OSA0 and OSA1 are simultaneously allocated to the same size is shown as a preferred example, but in case of allocating different sizes or only one spare area (either OSA0 or OSA1), It is obvious that the technical idea of the present invention is equally applicable.

In addition, in the embodiments of FIGS. 3B to 3D, the reduction of the spare area may be impossible due to the characteristics of the present invention, or the size of the reduced spare area may be limited when the spare area is reduced.

4A to 7B illustrate a method of registering (modifying) related defect management information when the spare area is changed according to the above-described embodiments of FIGS. 1A to 3D. 5A and 5B illustrate the case where the spare area is additionally allocated, and FIGS. 6A to 7B illustrate the case where the existing spare area is reduced. will be.

In the present invention, the term "defect management information" means information for disc defect management, and is recorded in a defect management area (DMA; not shown) provided in the lead-in area and the lead-out area. In particular, it means information registered as a Defect List (DFL) entry (DFL entry).

The " defect list entry " (DFL entry) not only records the position information of each cluster when the defective cluster in the user data area is replaced with the normal cluster in the spare area, but also serves as a replacement area among the clusters in the spare area. Information that distinguishes between possible and unavailable clusters is recorded.

In particular, an entry type is defined to distinguish the type of information recorded in the " defect list entry ". The normal replacement recorded entry is " RAD type " The cluster that can be used as the "SPR type" is the "unusable type" which is not available as an alternative area among the clusters in the spare area. The cluster that is not normally replaced with the defective area or spare area in the user data area is the "PBA type". Separate each

Fig. 4A shows a structure in which a spare area is additionally allocated, in which the newly allocated area is " Pus " (meaning that the user data area u before the change becomes the spare area s after the change). The area remaining as the user data area is called "Puu" (meaning the user data area uu before and after the change). Therefore, the newly added clusters in the spare area Pu are registered as defect management information according to their respective states, and are registered in a defect list entry (DFL entry). FIG. 4B shows this in a table form.

That is, since the defect cluster B in the Pus area is not utilized for the replacement record, it is registered in the defect list entry (DFL entry) as an "unusable type", and the normal clusters A and C which are not defects in the Pus area are already registered. Regardless of whether it is a recorded area or not, all of them are clusters that can be used for replacement recording, and therefore, they are registered in the DFL entry as an "SPR type".

Fig. 5A briefly shows a structure in which the spare area is expanded. The area newly included in the spare area due to the expansion of the spare area is called "Pus", and the area remaining as the user data area is called "Puu". The area remaining as a spare area is called "Pss" (meaning a spare area ss before and after the change). Therefore, the clusters in the newly expanded spare area Pu are registered as defect management information as a defect management information according to their respective states, and FIG. 5B shows them in a table form.

That is, since the defect cluster B in the Pus area is not utilized for the replacement record, it is registered in the defect list entry (DFL entry) as an "unusable type", and the normal clusters A and C which are not defects in the Pus area are already registered. Regardless of whether it is a recorded area or not, all of them are clusters that can be used for replacement recording, and therefore, they are registered in the DFL entry as an "SPR type". That is, the same method of registering defect management information as in the case where the spare area of Fig. 4B is additionally allocated is applied.

6A to 7B briefly show a structure in which the spare area is reduced, and "Psu" (the spare area s before the change is changed to the user data area) after the spare area is reduced to "Psu". (u) means), and the area remaining as the user data area is called "Puu", and the area remaining as a spare area is called "Pss".

In particular, Figs. 6A and 6B show a case where it is sufficient to alternately record an already recorded replacement area C as another spare area as a previous spare area, and Figs. 7A and 7B show an already recorded replacement area C. Shows a case where it is not possible to substitute and record to another spare area.

Therefore, the cluster newly included in the user data area Psu by the reduction of the spare area is registered as a defect management information in the defect list entry (DFL entry) or deleted according to each state. It is shown as.                     

That is, since the defective cluster B in the Psu area is an area in which normal data recording cannot be performed even if it is changed to the user data area, it is registered in the defect list entry (DFL entry) as "PBA type" and the replacement recording in the Psu area is performed. The cluster A, which was not used in the past, was originally registered in the defect list entry (DFL entry) as an "SPR type", but the information is deleted from the defect list entry (DFL entry) as the user data area is changed. In addition, the cluster C used for the replacement recording in the Psu area will be registered in the defect list entry (DFL entry) as the "RAD type ". The information is changed to the new " RAD type " DFL entry).

In detail, the "RAD type" defect list entry (DFL entry) records the position information of a cluster in which a defect has occurred in the user data area and the position information of the cluster in the spare area in which the defect is recorded. Since the replacement and write of the cluster C in the spare area is changed to the user data area by this reduction, the data recorded in the cluster C is replaced and recorded again in another spare area, and the cluster in the newly replaced and spare area is recorded. The " RAD type " changed to the location information is registered in the defect list entry (DFL entry).

Therefore, if another spare area is sufficiently provided to enable the replacement recording, all the above operations are performed without any problem.

Fig. 7A shows a case where another spare area for the new substitute recording described above is not provided. In other words, the cluster C in the spare area that has already been used for the replacement recording cannot be replaced by another spare area, and thus the area must be excluded from the reduction target. Therefore, in this case, the reduction of the spare area is allowed only up to the area excluding the cluster C. 7B illustrates this in a table form.

That is, since the defective cluster B in the Psu area is an area in which normal data recording cannot be performed even if it is changed to the user data area, it is registered in the defect list entry (DFL entry) as "PBA type" and the replacement recording in the Psu area is performed. The cluster A, which was not used in the past, was originally registered in the defect list entry (DFL entry) as an "SPR type", but the information is deleted from the defect list entry (DFL entry) as the user data area is changed.

In addition, the cluster C used for the replacement recording cannot be changed into the user data area because there is no spare area to be newly recorded in " RAD type ", and remains as the continuous spare area Pss.

That is, as can be seen from Figs. 7A and 7B, in the present invention, when the reduction of the spare area is to be carried out, first, whether there is an alternative recorded cluster C existing in the area to be reduced and whether or not the cluster C is present. It can be seen that if there is enough spare area to replace and write the cluster C again, the final size of the spare area to be reduced is determined according to the result.

In addition, in the case where the spare area is to be reduced, the position of the last recorded cluster can be confirmed, and then it can be reduced before the area. In detail, most recordable optical discs are extended or allocated from the position near the end of the outer periphery to the inner periphery in the case of the spare area located at the outer periphery, and at this time, the start address and the end address of the spare area are specified as management information. It is recorded in the area. At this time, the start position for reducing the spare area may be checked with reference to the above information, particularly the start address. In addition, the position information of the last alternatively recorded cluster in the spare area can be confirmed using the above-described defect list entry (DFL entry). In other words, by using the position information of the last alternatively recorded cluster, reduction is performed by setting from the start position of the spare area to just before the position information of the last alternatively recorded cluster as a collapsible region.

This does not check whether there is a replacement recorded cluster existing in the expected area to be reduced as shown in FIGS. 7A and 7B, and if there is another spare area sufficient to replace the recording if the cluster exists. By checking only the position of the last replaced spare area and setting and executing the reduction target until just before the position, there is an advantage that it can be executed more simply and quickly.

If the spare area located in the outer periphery is used for alternate recording in order from the start address to the outer periphery, that is, the spare area set within the first variable size is used in the descending order from the outer periphery end (end address) in order. In the case of an optical disc that is used in order from the start address to the end address, that is, in the ascending order, not the optical disc, the reduction of the spare area may be an area in which the end address of the spare area can be reduced after the last replacement-recorded cluster. . In this case, there may be a problem in that the newly expanded user area due to the reduction of the spare area is disconnected from the previous area due to the intermediate spare area, but it is not a big problem as the access function of the optical recording / reproducing system is improved. will be.

8 is a flowchart showing a recording / reproducing method of an optical disc including the spare area variable control method of the present invention.

First, before recording data on the optical disc, the optical disc is formatted, which is called an initialization state. When initializing, it is necessary to first determine whether a spare area is allocated (S10). In case of allocating a spare area, it corresponds to the case of performing defect management utilizing the spare area (S102). If the defect management using the spare area is not performed (S101).

When the initialization process is completed, the disc is in an in-use state, and then recording or reproducing is possible at the request of the user. In particular, by allocating a spare area, in an in-use state for performing defect management utilizing the spare area, the spare area allocated by the user or the system can be changed (S20).

Accordingly, when additional allocation or extension of the spare area is desired, the size of the extended spare area is determined (S201), and the cluster included in the extended spare area is registered in the defect list entry (DFL entry) (S202). ). The method of registering in the defect list entry (DFL entry) has been described above with reference to FIGS. 4A to 5B.

 In addition, when the spare area is to be reduced, the data in the cluster that has already been used for the replacement recording among the clusters included as the user data area due to the reduction of the spare area should be replaced with another spare area. Check whether there is another spare area (S30), and if enough spare areas exist, determine the size of the spare area to be reduced, and among the clusters included as a user data area due to the reduction of the spare area, a defective cluster. Registers the defect list entry (DFL entry), and the " SPR type " cluster is deleted from the defect list entry (DFL entry) (S302). The method of registering in the defect list entry (DFL entry) has been described above with reference to Figs. 6A to 6B.

In addition, if there is not enough spare area, reduction of the spare area by the corresponding portion becomes impossible (S301), and it is possible to reduce the limited area only to the shrinkable area (S301). In the case of limited reduction, the size of the reduced spare area is determined, and among the clusters included as the user data area due to the reduction of the spare area, the defective cluster is registered in the defect list entry (DFL entry), and the " SPR type " The cluster is deleted from the defect list entry (DFL entry). The method of registering with the defect list entry (DFL entry) has been described above with reference to Figs. 7A to 7B.

9 shows the configuration of the optical recording and reproducing apparatus of the present invention, wherein the pickup section 11 and the operation of the pickup section 11 for reading various management information including data recorded in the optical disc and defect management information Servo 14 and control unit 10 to restore the reproduced signal received from pickup unit 11 to a desired signal value, or modulate a signal to be recorded into a signal recorded on an optical disc. The signal processor 13 for transmitting, the memory 15 for temporarily storing the file system information read out from the optical disc, and the microcomputer 16 for controlling the operation are basically configured, and in relation to the above components, It is also referred to as "recording and playback section 20".

The microcomputer 16 transmits the read data and management information to the control unit 12 for use in recording and reproducing. In particular, the control unit 12 desires to change the spare area through an interface with the user. In this case, it is determined whether the change of the spare area is feasible or impossible, and if possible, the intra-disk area division is changed through the microcomputer 16, and the related defect management information is changed to control the change of the spare area. Done. In this regard, it will be apparent that the change of the spare area is not necessarily performed only by a user's request, and the control of the spare area may be controlled to perform the change of the spare area if necessary.

However, the control unit 12 is not provided in the optical recording and reproducing apparatus, and may be composed of only the recording and reproducing unit 20 (also referred to as “drive” in particular). In this case, the microcomputer 16 controls the control unit 12. It may also play a role of).

In this regard, the AV decoder 17 finally decodes the output data under the control of the controller 12 and provides the same to the user. The AV encoder 18 controls the controller 12 to perform a function of recording a signal on the optical disc. The input signal is converted into a signal of a specific format, for example, MPEG2 (MPEG2) transport stream, and provided to the signal processing unit 13 in the recording / reproducing unit 20 under the control of the &quot;                     

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The present invention proposes a variable control method for controlling the size of the spare area and controlling the size of the spare area as a standardized method for efficient utilization of the high density optical disc, which enables efficient use of the spare area. This has the advantage of contributing to the performance improvement.

Claims (16)

In an optical disk to which at least one spare area is allocated, If the spare area size is to be extended, a cluster in the previous user data area newly included as the spare area by registering the spare area is registered as defect management information. If the spare area size is to be reduced, a cluster in the previous spare area newly included as the user data area by registering the spare area is registered as defect management information. In performing the spare area reduction, if the cluster already used for the replacement recording among the clusters in the previous spare area to be included as the user data area is capable of performing replacement recording again to another spare area, performing the reduction of the cluster is performed. An optical disk spare area variable control method, characterized in that allowed. The method of claim 1, And the variable spare area is a spare area allocated adjacent to an end of the user data area. The method of claim 2, And when there are two or more recording layers of the optical disc, only one spare area allocated adjacent to the end of the last user data area is variable. The method of claim 2, And when there are two or more recording layers of the optical disc, the optical disc spare area variable control method characterized in that the storage area can be changed for each spare area allocated adjacent to the end of the user data area for each recording layer. The method of claim 1, When a cluster in a previous user data area newly included as a spare area is registered as defect management information by expanding the spare area, if the cluster is a defective area, it cannot be used as a replacement area (unusable Type), If the normal area, the optical disk spare area variable control method characterized in that the registration as a replaceable area (SPR Type). The method of claim 1, When a defect cluster in a previous spare area newly included in the user data area is registered as defect management information by shrinking the spare area, an optical disc characterized in that it cannot be used as a user data area (PBA Type). Spare area variable control method. The method of claim 1, When a cluster in a previous spare area, which is newly included as a user data area, is registered as defect management information by reducing the spare area, if the cluster has already been recorded and replaced, the data recorded in the cluster is replaced with another spare area. 12. An optical disc spare area variable control method characterized in that a substitute recording is carried out and a newly recorded replacement is recorded (RAD type). The method of claim 1, In performing the spare area reduction, if the cluster already used for the replacement recording among the clusters in the previous spare area to be included as the new user data area is not capable of replacement recording again to another spare area, the reduction of the cluster is performed. Optical disc spare area variable control method characterized in that it is impossible. In the case where a spare area is allocated to an optical disc and the size of the spare area is to be reduced, in determining the size of the spare area that can be reduced, The size of the cluster already used for the replacement recording among the clusters in the previous spare area to be newly included as the user data area by the reduction of the spare area, and another data for recording the data recorded in the cluster used for the replacement recording again. Make sure the spare area exists, And if the spare area does not exist, minimizing the spare area as much as the cluster size already used for the replacement recording. In an optical disc in which a spare area adjacent to the end of the user data area is not allocated, When a new spare area is to be allocated to the optical disc, a spare area is additionally allocated adjacent to an end of the user data area. And a cluster in a previous user data area newly included in the spare area by additional allocation of the spare area as defect management information. The method of claim 10, And in the case where there are two or more recording layers of the optical disc, only one spare area can be additionally allocated adjacent to the end of the last user data area. The method of claim 10, And when there are two or more recording layers of the optical disc, a spare area can be additionally allocated adjacent to the end of the user data area for each recording layer. The method of claim 10, When registering a cluster in a previous user data area to be newly included as a spare area by the allocation of spare areas as defect management information, if the cluster is a defective area, it cannot be used as a replacement area (unusable Type), If the normal area, the optical disk spare area variable control method characterized in that the registration as a replaceable area (SPR Type). In recording and reproducing of an optical disc to which a spare area is allocated, During the optical disk in-use state, check whether there is a variable request of the spare area, If the variable request is an additional allocation of a spare area or an extension of a spare area, the cluster included in the area extended to the spare area is registered as defect management information.  If the variable request is a reduction of the spare area, the size of the spare area can be reduced, and according to the determined size of the spare area reduction, a cluster newly included in the user data area is registered as defect management information. And recording and reproducing the data after the variable of the spare area is completed. The method of claim 14, In determining the shrinkable size of the spare area, the size of the cluster already used for the replacement recording among the clusters in the previous spare area to be included as the user data area by the spare area reduction is checked, Check whether there is another spare area for alternate recording of the data recorded in the cluster again, and if the spare area does not exist, allowing the spare area to be reduced until the cluster previously used for the replacement recording. A data recording and reproducing method on an optical disc. An optical recording and reproducing apparatus comprising: a recording and reproducing section 20 for reading data from an optical disk or recording data on an optical disk; and a control section 12 for receiving a user command and controlling the recording and reproducing section. The controller 12 checks whether there is a variable request of the spare area during an in-use state of the optical disc, and expands to the spare area if the variable request is an additional allocation of the spare area or an extension of the spare area. Register the cluster included in the area to be defect management information, and if the variable request is a reduction of the spare area, determine the size of the spare area can be reduced, and newly include the user data area according to the determined spare area reduction size. And recording and reproducing the cluster as defect management information, and controlling the recording and reproducing unit (20) to perform recording and reproducing after the spare area variable is completed.

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