KR101044951B1 - recording?reproducing method for information storage medium including a plurality of recording layers - Google Patents

recording?reproducing method for information storage medium including a plurality of recording layers Download PDF

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KR101044951B1
KR101044951B1 KR20090063073A KR20090063073A KR101044951B1 KR 101044951 B1 KR101044951 B1 KR 101044951B1 KR 20090063073 A KR20090063073 A KR 20090063073A KR 20090063073 A KR20090063073 A KR 20090063073A KR 101044951 B1 KR101044951 B1 KR 101044951B1
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area
recording
dedicated
dedicated area
data
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KR20090063073A
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Korean (ko)
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KR20090081364A (en
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이경근
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삼성전자주식회사
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Abstract

A recording / reproducing method for an information storage medium is provided. In the recording / reproducing method according to the present invention, an information storage medium having a plurality of recording layers, wherein each recording layer includes at least one of a lead-in area and a lead-out area, a data area, a connection area, and a dedicated area. Allocating a data area flexibly to correspond to the capacity of data to be recorded, allocating a connection area after the data area, and allocating a dedicated area after the connection area, recording data in the allocated data area or data from an information storage medium. Reading the step. According to the present invention, it is possible to selectively allocate a dedicated area for a predetermined purpose to the outer peripheral area of the optical disk having a plurality of recording layers. In particular, in view of the recording characteristics of the optical disk and the recording characteristics of the outer peripheral area, various optical disk formats capable of selectively allocating a dedicated area for a predetermined purpose to the outer peripheral area are provided.

Description

Recording / reproducing method for information storage medium including a plurality of recording layers}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage medium having a plurality of recording layers. More particularly, the present invention relates to an information storage medium, ie, an optical disc and a recording / reproducing apparatus and method, in which an exclusive area for a predetermined purpose is allocated to an outer peripheral area.

In general, an optical disk is widely used as an information storage medium of an optical pickup device that records / reproduces information in a non-contact manner, and according to an information recording capacity, a compact disk (CD) and a digital versatile disk (DVD) are used. disk). In addition, as an optical disk capable of recording, erasing and reproducing information, 650MB CD-R, CD-RW, 4.7GB DVD + R / RW, random access memory (DVD-RAM), DVD-R / RW (rewritable), and the like. There are 650MB CD and 4.7GB DVD-ROM. Furthermore, next generation DVDs with a recording capacity of 15GB or more are also under development.

Fig. 1A shows a general structure of a rewritable optical disc according to the prior art, and Fig. 1B shows a general structure of a read-only optical disc according to the prior art. The structure of the lead-out area of the rewritable optical disc shown in FIG. 1A is almost the same as that of the lead-in area.

In the rewritable optical disc shown in Fig. 1A, a test zone for optimum power control (OPC) is allocated to the lead-in area. However, such a test zone is not necessary for a play-only disc. Optimum Power Control (OPC) is an optimal recording method for recording user data, by recording the data in a test zone in advance at various recording powers before the data recording and / or reproducing apparatus records the user data on a rewritable optical disc. To determine the power.

However, a conventional rewritable optical disc has only a test zone for a fixed size OPC at a fixed position, and thus, there is a problem in that it is not possible to additionally allocate a test zone or increase the size of the test zone as needed.

Furthermore, in the case of an optical disc having a plurality of recording layers, the recording characteristics are different depending on which recording layer is recorded first, so that the recording characteristics should be arranged in consideration of allocating a test area for OPC to the optical disk. In particular, when the test area is allocated to the outer area of the optical disk, the characteristics of the outer area should be considered. In addition, in the case of an optical disc having a plurality of recording layers, the recording characteristics in the outer peripheral area are worse than in the case of an optical disc having a single recording layer. Furthermore, in the case of allocating not only the test area but also other purpose areas to the outer area of the optical disc, the characteristics of the outer area should be taken into consideration.

In the case of the dual recording layer optical disc, the recording characteristics of the recording layer L2 vary depending on whether or not recording is performed in the recording layer L1 close to the pickup. Therefore, when recording is performed in the order of L1 and L2, data is always recorded in L1 when data is recorded in L2. Even when test data is recorded in the test zone provided in L2 for the OPC, the pre-recording area must be allocated in advance to L1 because the data must be recorded in advance in L1. However, the allocation of such a pre-recording area has the disadvantage that the production cost increases for the data recording and / or reproducing apparatus. Therefore, it is required to selectively determine whether to allocate a pre-record area and to assign a test zone for OPC. Therefore, in this case, the optical disc needs an OPC area at a predetermined position and a test zone for OPC that the drive can selectively use.

In addition, when recording in the outer peripheral area of the dual recording layer disc, the position of the middle area may be different from the position defined in the single layer disc for more efficient recording in time. In such a case, various layouts are required for allocating test areas for OPC, especially in the outer area.

Further, in the case of allocating not only a test zone for OPC but also a dedicated area for other purposes to the outer peripheral area of the optical disc, the same problem as described above is required and special consideration is required.

SUMMARY OF THE INVENTION The present invention is directed to recording an information storage medium having a plurality of recording layers capable of selectively allocating a dedicated area for a predetermined purpose in the outer area in consideration of the recording characteristics of the disk and the recording property of the outer area. / Provide a playback method.

In a recording / reproducing method according to an embodiment of the present invention, an information storage medium having a plurality of recording layers, each recording layer including at least one of a lead-in area and a lead-out area, a data area, a connection area, and a dedicated area. Allocating the data area in a flexible manner so as to correspond to a capacity of data to be recorded in the recording layer, allocating the connection area after the data area, and allocating the dedicated area after the connection area; Writing data to the area or reading data from the medium.

The recording / reproducing method may further include arranging the dedicated area adjacent to the connection area, and assigning or flexibly allocating a size of the connection area.

The recording / reproducing method may further include using the dedicated area as a dedicated area for testing a data recording or reproduction condition.

According to another embodiment of the present invention, a recording / reproducing method includes: a first data area flexibly allocated to a first recording layer of an information storage medium including a plurality of recording layers according to a capacity of data to be recorded on the medium; Allocate a first flexible dedicated area part and a first fixed dedicated area part that are flexibly allocated according to an allocation of a first data area, and flexibly allocate to a second recording layer of the medium according to the capacity of data to be recorded on the medium. A second data area to be allocated, a first flexible dedicated area part to be flexibly allocated according to the allocation of the second data area, and a first fixed dedicated area part to be allocated, and recording data in the allocated data area or data from the medium. Reading the step.

As described above, according to the present invention, it is possible to selectively allocate a dedicated area for a predetermined purpose to the outer peripheral area of the optical disk having a plurality of recording layers. In particular, in view of the recording characteristics of the optical disk and the recording characteristics of the outer peripheral area, various optical disk formats capable of selectively allocating a dedicated area for a predetermined purpose to the outer peripheral area are provided.

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

2A and 2B are views showing the structure of an optical disk according to an embodiment of the present invention. The optical disc shown in Figs. 2A and 2B is a dual layer optical disc having two recording layers L1 and L2.

First, referring to FIG. 2A, the recording layer L1 includes a first data area and a first outer area. The first outer area includes a first connection area (middle area), a first unused area, a first buffer area, a first dedicated area, a first pre-recorded area, and a first unrecorded area in an inner circumferential direction. The recording layer L2 includes a second data area and a second outer area. The second outer region may include a second connection region (middle area), a second dedicated region, a second buffer region, a second unused region, a third buffer region, a third dedicated region and a third peripheral region from the inner circumference to the circumferential direction. It includes two unrecorded areas.

The first data area and the second data area are areas for recording user data. In the first connection area and the second connection area, data of a predetermined pattern indicating that the data area is terminated is recorded. The data recording and / or reproducing apparatus reads out and reads data of the predetermined pattern and recognizes that the connection region is not a data region. Meanwhile, the data of the predetermined pattern generally records data having a lead-out attribute.

The first dedicated area, the second dedicated area and the third dedicated area are areas used by the data recording and / or reproducing apparatus for a special purpose, for example, a test area for Optimal Power Control (OPC). However, the first dedicated area to the third dedicated area may be areas other than the test area. For example, the data recording and / or reproducing apparatus may be an area for recording information or the like which indicates when recording is performed or the like.

The first unused area and the second unused area are areas not used at all. In the case of an optical disc having a plurality of recording layers capable of rewriting, the recording characteristic varies depending on which recording layer is recorded first. In particular, the recording characteristic of the outer peripheral area of the optical disc is worse than the recording characteristic of the inner peripheral area. Therefore, the area of the recording layer L2 at the same position as that of the first dedicated area is designated as the second unused area so that no data is recorded. Similarly, an area of the recording layer L1 at the same position as that of the second dedicated area is designated as the first unused area so that no data is recorded. If such a dedicated area is used as the test area, and the laser beam passes through the recording layer L1 and enters L2 when recording to the recording layer L2, and passes the first unused area during test recording to test recording in the second dedicated area. Then, the recording condition of the recording layer L2 can be found by adding the characteristic parameter according to the recording layer L2 to this test result.

The first buffer area, the second buffer area and the third buffer area are provided in consideration of the eccentricity of the optical disk and the size of the irradiated light. This will be described in more detail with reference to FIG. 3.

FIG. 3 is a diagram for explaining an area of the recording layer L1 affected by light irradiated to the recording layer L2. When the light 400 is focused at a specific position of the recording layer L2 through the objective lens 300 of the data recording and / or reproducing apparatus, the area of the recording layer L1 corresponding to the radius y is shown as Will be affected. The first buffer area to the third buffer area are allocated to a predetermined size in consideration of factors such as the influence of light irradiated for data recording on another recording layer, the size of the light and the eccentricity of the optical disk.

The first pre-recorded area is an area provided for using the third dedicated area, and data is recorded in various ways and at various time points before using the third dedicated area. For example, data may be recorded in a pre-recorded area in a predetermined manner before recording by a disc producer in a manner of forming a pit at a position determined as a pre-recorded area at the time of disc production, or before using the third dedicated area by the data recording and reproducing apparatus. You can also record. In the case of the third dedicated area, since the test is performed while the recording layer L1 is already recorded, it is not necessary to add a characteristic parameter according to the recording layer L2 to the test result.

The first unrecorded area and the second unrecorded area are areas located at the outermost circumference of the disc and are designated as areas in which data is not recorded in consideration of bad recording characteristics and the like. However, the first unrecorded area and the second unrecorded area may not be allocated. An unrecorded area may also be referred to as an unused for user or blank area.

In the example shown in Fig. 2A, the first connection area and the second connection area are provided at predetermined positions of the outer circumference of the disc, and the first dedicated area, the second dedicated area, the third dedicated area, and the first pre-recorded area of the disk are provided. Capacity is allocated flexibly. The peripheral boundaries of the third dedicated area and the first pre-recorded area of the optical disc shown in FIG. 2A are determined by the data recording and reproducing apparatus loaded with the optical disc according to the present embodiment.

The structure of the optical disc shown in FIG. 2B is also the same as that of the optical disc shown in FIG. 2A. However, in the case of the optical disc shown in FIG. 2A, the outer circumferential boundary of the third dedicated area and the first pre-recording area is variable, whereas in the case of the optical disc shown in FIG. 2B, the third dedicated area and the first dictionary There is a difference in that the boundary of the circumferential direction of the recording area is fixed.

The optical disc according to the embodiment shown in Figs. 4A to 9B presents various formats of the outer area in order to increase the utilization of the outer area of each recording layer when the size of the outer area of each recording layer increases from the original.

4A and 4B show a structure of an optical disc according to another embodiment of the present invention, which is a dual layer optical disc having two recording layers L1 and L2.

In this embodiment, when recording data on a dual recording layer optical disk, the user data capacity to be recorded is less than the total recording capacity that can be recorded on the optical disk, and the data recording and / or reproducing apparatus can know in advance the user data capacity to be recorded. If so, the data recording and / or reproducing apparatus determines the size of the data area of each recording layer so that the same amount of user data can be recorded in the two recording layers L1 and L2.

Since the start position of the data area of each recording layer is already determined, when the size of the data area of each recording layer is determined, the end position of each data area can be determined. Since the size of each newly determined data area will be smaller than the original, the size of the outer area after the data area of each recording layer will increase than the original.

First, referring to FIG. 4A, the recording layer L1 includes a first data area and a first outer area. The first outer area includes a third connection area (middle area), a third unused area, a fourth buffer area, a fourth dedicated area, a second pre-recorded area, a third unrecorded area, and a first connection area from an inner circumference to an outer circumferential direction. And a first unused area, a first buffer area, a first dedicated area, a first pre-recorded area, and a first unrecorded area. That is, the structure of the first outer region of the recording layer L1 shown in FIG. 4A is a form in which the structure of the first outer region shown in FIG. 2A is repeated. However, although the start position of the first connection region is fixed, the start position of the third connection region may be flexibly determined according to the capacity of the data region.

The recording layer L2 of FIG. 4A includes a second data area and a second outer area. The second outer area may include a fourth connection area, a fifth dedicated area, a fifth buffer area, a fourth unused area, a sixth buffer area, a sixth dedicated area, a fourth unrecorded area, and a second connection area in an inner to outer circumferential direction. (middle area), a second dedicated area, a second buffer area, a second unused area, a third buffer area, a third dedicated area, and a second unrecorded area. That is, the structure of the second outer region of the recording layer L2 shown in FIG. 4A is a structure in which the structure of the second outer region shown in FIG. 2A is repeated.

In the optical disk according to the embodiment shown in Fig. 4A, the peripheral boundaries of the second pre-recorded area, the sixth dedicated area, the first pre-recorded area and the third dedicated area are variable. The circumferential boundary of these areas is determined by the data recording and reproducing apparatus loaded with the optical disc according to the present embodiment.

On the other hand, the areas allocated to the right side respectively based on the second unrecorded area and the fourth unrecorded area are fixedly allocated all the time, but are respectively assigned to the left side on the basis of the second unrecorded area and the fourth unrecorded area. Whether to allocate the allocated areas can be selectively determined by the data recording and / or reproducing apparatus. Also, in the case where the areas allocated to the left on the basis of the second unrecorded area and the fourth unrecorded area are respectively allocated, the areas allocated to the right on the basis of the second unrecorded area and the fourth unrecorded area may be used or not used. It may not.

The structure and use method of the optical disc shown in FIG. 4B are the same as the structure and use method of the optical disc shown in FIG. 4A. However, in the case of the optical disc shown in Fig. 4B, the outer circumferential boundary of the second pre-recorded area and the sixth dedicated area is variable, but the outer circumferential boundary of the first pre-recorded area and the third dedicated area is fixed.

Hereinafter, the structure of the optical disks according to another embodiment of the present invention, a method of using the same, and the like will be described based on the structure of the optical disk according to the embodiment shown in FIGS. 4A and 4B.

5A and 5B are views showing the structure of an optical disc according to another embodiment of the present invention. The optical disc shown in FIG. 5A differs in that it does not include the first pre-recording area, the third buffer area and the third dedicated area provided in the optical disc shown in FIG. 4A. Similarly, the optical disc shown in FIG. 5B differs in that it does not include the first pre-recording area, the third buffer area and the third dedicated area provided in the optical disc shown in FIG. 4B.

6A and 6B are views showing the structure of an optical disk according to another embodiment of the present invention. The optical disc shown in FIG. 6A differs in that it does not include the second pre-record area, the sixth buffer area and the sixth dedicated area provided in the optical disc shown in FIG. 4A. Similarly, the optical disc shown in Fig. 6B differs in that it does not include the second pre-recording area, the sixth buffer area and the sixth dedicated area provided in the optical disc shown in Fig. 4B.

7A and 7B are views showing the structure of an optical disk according to another embodiment of the present invention. The optical disc shown in FIG. 7A differs in that it does not include the first connection area and the second connection area provided in the optical disc shown in FIG. 4A. Similarly, the optical disc shown in FIG. 7B differs in that it does not include the first connection area and the second connection area provided in the optical disc shown in FIG. 4B.

8A and 8B are views showing the structure of an optical disk according to another embodiment of the present invention. 8A differs in that the optical disk shown in FIG. 8A does not include the first connection region and the second connection region provided in the optical disk shown in FIG. 5A. Similarly, the optical disc shown in FIG. 8B differs in that it does not include the first connection area and the second connection area provided in the optical disc shown in FIG. 5B.

9A and 9B are views showing the structure of an optical disk according to another embodiment of the present invention. The optical disc shown in FIG. 9A differs in that it does not include the first connection area and the second connection area provided in the optical disc shown in FIG. 6A. Similarly, the optical disc shown in FIG. 9B differs in that it does not include the first connection area and the second connection area provided in the optical disc shown in FIG. 6B.

As mentioned above, although the case of the dual recording layer optical disk is taken as an example, this invention is not limited to this, The case of an optical disk having two or more recording layers can be applied in the same manner.

In addition, the case in which the direction in which data is recorded on the optical disks according to the embodiment of the present invention described above is described as an example of OTP (Opposite track pass), but the same applies to the case in which the recording direction is PTP (Parallel track pass). can do.

Further, the above-described middle area may be recorded with data in a pre-recording method or a pre-embossed method, and may be stored in the data recording and / or reproducing apparatus after the data area is used by the data recording and / or reproducing apparatus. The data may be recorded by means of various embodiments.

A recording / reproducing apparatus for allocating and using a disc according to the present invention is a device capable of recording and / or reproducing, and includes a recording / reading unit and a control unit. The recording / reading unit records data on a disc, which is an information storage medium according to the present invention, under the control of a controller, and reads out data for reproducing the recorded data. The control unit controls the recording / reading unit to record data in a predetermined recording unit block or processes the data read by the recording / reading unit according to the present invention to obtain valid data. In particular, the controller may check the capacity of the data to be recorded before recording the data on the disc, and then allocate a data area to the first and second recording layers only as much as the data capacity to be recorded, and allocate a dedicated area to the remaining areas. . In this case, the connection area indicating the end of the data area can be placed immediately after the data area and the dedicated area after the connection area. In the case of the dedicated area, the connection area can be placed immediately adjacent to the connection area, It is also possible to arrange a dedicated area in a fixed position without. In addition, the capacity of the dedicated area may be allocated flexibly or fixedly. In addition, in the case of allocating and using a disc in the format shown in Figs. 2A to 9B, the controller can allocate the position and capacity of the buffer area, and also allocate the position and capacity of the pre-record area, and also the dedicated area. You can also assign the location and capacity of.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

1A is a view showing a general structure of a rewritable optical disc according to the prior art;

1B is a view showing a general structure of a read-only optical disc according to the prior art;

2A and 2B are views showing the structure of an optical disk according to an embodiment of the present invention;

3 is a view for explaining an area of the recording layer L1 affected by light irradiated to the recording layer L2;

4A and 4B are views showing the structure of an optical disk according to another embodiment of the present invention;

5A and 5B show the structure of an optical disk according to another embodiment of the present invention;

6A and 6B show a structure of an optical disc according to another embodiment of the present invention;

7A and 7B are views showing the structure of an optical disk according to another embodiment of the present invention;

8A and 8B show the structure of an optical disk according to another embodiment of the present invention;

9A and 9B are views showing the structure of an optical disk according to another embodiment of the present invention.

Claims (17)

  1. delete
  2. delete
  3. delete
  4. In the recording / playback method,
    A first data area flexiblely allocated according to a capacity of data to be recorded on the medium in a first recording layer of an information storage medium, a first flexible dedicated area part flexiblely allocated according to the allocation of the first data area, and a first Assign a fixed-only area part,
    A second data area that is flexibly allocated to the second recording layer of the medium according to the capacity of the data to be recorded on the medium, a second flexible dedicated area part that is flexibly allocated according to the allocation of the second data area, and second fixed Assign a dedicated area part,
    Recording data in the allocated data area or reading data from the medium,
    The first flexible dedicated area part and the first fixed dedicated area part are allocated to the outer circumferential area of the first data area, and the second flexible dedicated area part and the second fixed dedicated area part are allocated to the outer circumferential area of the second data area. Recording / reproducing method.
  5. 5. The method of claim 4,
    The first fixed-only area part includes a first dedicated area,
    The second fixed dedicated area part includes a second dedicated area,
    The first corresponding area of the second recording layer at a position corresponding to the first dedicated area and the second corresponding area of the first recording layer at a position corresponding to the second dedicated area are each in an unrecorded state. Recording / reproducing method.
  6. The method of claim 5,
    Recording so that the data recording directions in the first dedicated area and the second dedicated area are opposite recording directions;
    And flexibly determining a final position of the first dedicated area and a final position of the second dedicated area.
  7. The method of claim 5,
    Considering an area not used due to the radial effect of the beam spanning the first recording layer when writing data to the second recording layer, a first buffer area is provided between the second corresponding area and the first dedicated area. And providing a second buffer area between the first corresponding area and the second dedicated area.
  8. The method of claim 5,
    The first fixed dedicated area part further includes a first middle area located at a predetermined position in front of the first dedicated area,
    And the second fixed dedicated area part further comprises a second middle area located at a predetermined position in front of the second dedicated area.
  9. The method of claim 5,
    The second fixed dedicated area part further includes a third dedicated area, wherein a third corresponding area of the first recording layer at a position corresponding to the third dedicated area is previously set before using the third dedicated area. Recording / reproducing method characterized in that
  10. 10. The method of claim 9,
    And the final position of the third dedicated area is flexible.
  11. 10. The method of claim 9,
    The first fixed dedicated area part further includes a first middle area located at a predetermined position in front of the first dedicated area,
    And the second fixed dedicated area part further comprises a second middle area located at a predetermined position in front of the second dedicated area.
  12. The method of claim 11,
    The first flexible dedicated area part includes a third middle area and a fourth dedicated area.
    The second flexible dedicated area part includes a fourth middle area and a fifth dedicated area.
    The fourth corresponding area of the second recording layer at a position corresponding to the fourth dedicated area and the fifth corresponding area of the first recording layer at a position corresponding to the fifth dedicated area are each in an unrecorded state. Recording / reproducing method.
  13. The method of claim 12,
    Recording so that the data recording directions in the fourth dedicated area and the fifth dedicated area are opposite recording directions;
    And flexibly determining a final position of the fourth dedicated area and a final position of the fifth dedicated area.
  14. The method of claim 13,
    Providing a third buffer region between the fifth corresponding region and the fourth dedicated region, and providing a fourth buffer region between the fourth corresponding region and the fifth dedicated region,
    And the third and fourth buffer areas are provided in consideration of areas that are not used due to a radial effect of beams that span the first recording layer when data is written to the second recording layer.
  15. The method of claim 12,
    The second flexible dedicated area part further includes a sixth dedicated area, wherein the sixth corresponding area of the first recording layer at a position corresponding to the sixth dedicated area is previously set before using the sixth dedicated area. Recording / reproducing method, characterized in that is recorded.
  16. The method of claim 15,
    And the final position of the sixth dedicated area is flexible.
  17. The method of claim 12,
    Data is not recorded in the area between the first flexible dedicated area part and the first fixed dedicated area part and in the area between the second flexible dedicated area part and the second fixed dedicated area part. Way.
KR20090063073A 2009-07-10 2009-07-10 recording?reproducing method for information storage medium including a plurality of recording layers KR101044951B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000018533A (en) * 1998-09-02 2000-04-06 구자홍 Recording capacity variableness method for optical recording medium and recording/reproducing method using the method
KR20030011102A (en) * 2001-04-24 2003-02-06 코닌클리케 필립스 일렉트로닉스 엔.브이. Device and method for recording information
KR20030094768A (en) * 2002-06-07 2003-12-18 엘지전자 주식회사 High density multi layer optical disc and method for managing a spare area

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000018533A (en) * 1998-09-02 2000-04-06 구자홍 Recording capacity variableness method for optical recording medium and recording/reproducing method using the method
KR20030011102A (en) * 2001-04-24 2003-02-06 코닌클리케 필립스 일렉트로닉스 엔.브이. Device and method for recording information
KR20030094768A (en) * 2002-06-07 2003-12-18 엘지전자 주식회사 High density multi layer optical disc and method for managing a spare area

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