KR20080047010A - Recording medium, method of allocating area on a recording medium, and method and apparatus for reading out management information - Google Patents

Abstract

A recording medium, a method of allocating area on the recording medium, and a method and an apparatus for reading out management information are provided to stably reproduce or record data to/from the recording medium, since tracking is less influenced by a signal recorded on a test zone of an OPC area. A recording medium comprises a plurality of recording layers, wherein a test area and a management area(2048) are successively allocated on each recording layer. The test area is physically allocated in front of the management area, comprising a test zone(2040) on which a test signal is recorded, and a test area buffer(4), on which the test signal is not recorded, adjacent to the management area. The test area buffer is allocated in a size which allows tracking for the management information area to start from the test area buffer.

Description

Recording medium, method of allocating area on a recording medium, and method and apparatus for reading out management information}

Fig. 1 shows one embodiment of the overall configuration of the optical recording and reproducing apparatus of the present invention.

Fig. 2 shows an example of the structure of a recordable optical disc to which the present invention is applicable.

3 shows another example of the structure of a recordable optical disc to which the present invention is applicable.

4 specifically illustrates an embodiment of an OPC area and a TDMA arrangement in the optical disk of the present invention.

5 illustrates an embodiment of an OPC process of the present invention.

Figure 6 illustrates one embodiment of tracking for reading TDMA in the optical disk of the present invention.

7A and 7B illustrate embodiments of an OPC region and tracking method according to the present invention.

8 shows another embodiment of the structure of the optical disc and the stable tracking method according to the present invention.

* Explanation of symbols for main parts of the drawings

20: recording and playback section 11: pickup

12 controller 13 signal processor

15: memory 16: microcomputer

The present invention relates to a recording medium, a recording medium area allocation method, management information reading method and apparatus.

As a recording medium, an optical disk capable of recording a large amount of data is widely used. Most recently, new high-density recording media, such as Blu-ray Discs (BDs) and high-density digital video discs (HD-DVDs), can record and store high-quality video data and high-quality audio data for a long time. High Definition Digital Versatile Disc) and the like are being developed.

High-density recording media, the next-generation recording media technology, are next-generation optical recording solutions that can contain data that significantly surpasses existing DVDs. In addition, the development of an optical recording and reproducing apparatus using a high density recording medium standard has also begun.

However, since the specification of the high density recording medium is not yet fully completed, there are many limitations in developing an optical recording and reproducing apparatus based on the high density recording medium in earnest.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a recording medium and a recording medium area allocation method for ensuring stable tracking. In addition, the present invention provides a management information reading method and apparatus for stably reading management information from a recording medium.

In order to achieve the above object, the present invention provides a recording medium comprising at least one recording layer in which a test area and a recording medium management information area are continuously allocated, wherein the test area is physically ahead of the recording medium management information area. And a test zone buffer allocated to the test zone and adjacent to the recording medium management information area, the test area buffer having no test signal recorded therein, wherein the test area buffer has a tracking for the recording medium management information area. A recording medium is provided, the size of which can be started from the test area buffer.

The present invention also includes an embodiment in which the tracking proceeds from the physically front sector to the back sector in the recording layer.

In addition, the present invention includes an embodiment in which the size of the test area buffer is allocated as the recording speed increases.

In addition, the present invention includes an embodiment in which the test area buffer is composed of more than four physical clusters.

In addition, the present invention includes an embodiment in which the test area is an optimum power control area.

In addition, the present invention is the optimal power control region is composed of a fixed number of physical clusters, the test zone is a fixed number of physical clusters minus the physical clusters constituting the test area buffer from the fixed number of physical clusters It includes embodiments that are configured.

In addition, the present invention is the test zone is composed of a fixed number of physical clusters, the optimal power control region is composed of the sum of the physical clusters constituting the test zone and the physical clusters constituting the test area buffer. Examples are included.

The present invention also includes an embodiment in which the recording medium management information area is a temporary disc management area.

The present invention also includes an embodiment in which the recording medium is a write once disc.

The present invention also provides a recording medium comprising at least one recording layer in which a test area and a recording medium management information area are continuously allocated, wherein the test area is physically assigned to the front of the recording medium management information area. And a test area buffer in which a test signal is recorded and a test area buffer adjacent to the recording medium management information area and in which the test signal is not recorded, wherein the test area buffer is allocated to a different size according to a recording speed. To provide.

The present invention also provides a recording medium comprising at least one recording layer, the recording layer comprising: a test area in which a test for recording and / or reproduction of the recording medium is performed; And a recording medium management information area in which management information for the recording medium is recorded, wherein the recording medium management information area is allocated on an inner circumferential side of the recording layer rather than the test area.

Further, the present invention includes an embodiment in which the test area is allocated adjacent to the recording medium management information area.

In addition, the present invention provides a method for allocating a test area and a recording medium management information area to at least one recording layer included in a recording medium, wherein the test area and the recording medium management information area are continuously allocated to each other. And a test zone in which a test signal is recorded and a test area buffer in which the test signal is not recorded while adjacent to the record medium management information area are allocated to the test area. The test area buffer provides a method for allocating a recording medium area, wherein the tracking for the recording medium management information area is allocated to a size at which the tracking area buffer can be started.

In addition, the present invention includes an embodiment in which the size of the test area buffer is allocated as the recording speed increases.

The present invention also includes an embodiment in which the test region buffer is allocated to more than four physical clusters.

In addition, the present invention is an optimal power control area in which the test area is composed of a fixed number of physical clusters, and the test zone constitutes the test area buffer in the fixed number of physical clusters. An embodiment consists of physical clusters minus clusters.

Also, the present invention is an embodiment in which the test region is an optimal power control region, and the optimal power control region is composed of a sum of a fixed number of physical clusters constituting the test zone and the physical clusters constituting the test region buffer. Include an example.

The present invention also provides a recording medium including at least one recording layer, wherein a test area for performing a test for recording and / or reproduction of the recording medium and management information for the recording medium are recorded in the recording layer. Allocating a recording medium management information area, but allocating the recording medium management information area to the inner peripheral side of the recording layer rather than the test area.

The present invention also includes an embodiment in which the test area is an Optimal Power Control area and the recording medium management information area is a Temporary Disc Management Area.

The present invention also includes an embodiment in which the test area is allocated adjacent to the recording medium management information area.

In addition, the present invention provides a method of reading management information recorded in the recording medium management information area from a recording layer in which at least one test area and a recording medium management information area, which are included in at least one recording medium, are continuously allocated. Determine a location of the recording medium management information area and start tracking in the test area that is physically allocated ahead of the recording medium management information area, wherein the tracking is a test zone and a test buffer area constituting the test area; A method of reading management information, characterized by starting from the test buffer area adjacent to the recording medium management information area and in which no test signal is recorded.

In addition, the present invention is a device for reproducing management information recorded in the recording medium management information area from a recording layer in which at least one test area and a recording medium management information area, which are included in at least one recording medium, are continuously allocated. A reader unit for reading data from a recording medium; And a control unit which checks a position of the recording medium management information area and controls the reader unit to read management information recorded in the recording medium management information area, wherein the control unit is physically larger than the recording medium management information area. Controlling the reader unit to start the tracking in the test buffer area allocated to the front, in the test buffer area where the test signal is not recorded while being adjacent to the recording medium management information area among the test zones and test buffer areas constituting the test area. It provides a management information reading device characterized in that.

Therefore, according to the present invention, the tracking is stable, and there is an advantage in that data in the recording medium can be stably reproduced or data can be recorded on the recording medium.

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

In this regard, the terminology used in the present invention is a general term that is currently widely used as possible, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, It is to be understood that the present invention is to be understood as the meaning of terms rather than the names of terms.

In this context, the term " recording medium " in the present invention means any medium in which data is recorded or can be recorded, and encompasses all mediums regardless of a recording method such as, for example, an optical disc and a magnetic tape. Hereinafter, the present invention will be described by using an optical disc, in particular, a "Blu-ray Disc (BD)" as a recording medium for convenience of description, but the technical concept of the present invention is applied to other recording media including HD-DVD. Equally applicable is obvious.

In addition, in the present invention, the term "OPC (Optimum Power Control) area" means an area allocated for performing an OPC process in a recording medium. "OPC (Optimum Power Control)" refers to a recordable recording medium (e.g., BD-R, BD-RE, etc.) that calculates an optimal recording power used for recording data on the recording medium. Say the process.

That is, when an optical disc is loaded into a specific optical recording and reproducing apparatus, the optical recording and reproducing apparatus repeatedly records a signal at a specific recording power in the OPC area of the optical disk and then reproduces it, thereby providing a desired reproduction quality. Calculate the optimal recording power to ensure. The optimum recording power determined through the above process is then used when recording data on the optical disk.

In addition, in the present invention, the "DCZ (Drive Calibration Zone) area" is an area utilized by an optical recording / reproducing apparatus (or 'drive') in a recording medium, and includes an optical recording / reproducing process including an OPC process. It means the area where the device can perform various tests.

Here, both the OPC area and the DCZ area can be utilized for the OPC process. In the present invention, the OPC area and the DCZ area are collectively referred to as a 'test area' and will be described below. Note that OPC performance is also applicable in the DCZ domain.

Fig. 1 shows one embodiment of the overall configuration of the optical recording and reproducing apparatus of the present invention.

The optical recording and reproducing apparatus 10 is composed of a recording and reproducing section 20 for recording data on the optical disk or reproducing the recorded data, and a controller 12 for controlling the same. In particular, the recording and playback section 20 may include a pickup 11, a signal processor 13, a servo 14, a memory 15, and a microcomputer 16. The pickup 11 records data directly on the optical disk or reads the data recorded on the optical disk, and the signal processing unit 13 receives the data read by the pickup 11 and restores the data to a desired signal value. The signal to be recorded is modulated into a signal recorded on the optical disk and transmitted to the pickup 11. The servo 14 controls the pickup 11 to accurately read out signals from or write signals to the optical disc, and the memory 15 stores management information and data or controllers (read from the optical disc). 12) and control information from the microcomputer 16 are temporarily stored. The microcomputer 16 is responsible for controlling the components included in the recording and playback section 20.

In view of reproduction, the recording / reproducing section reads data from the optical disc 30 under the control of the controller 12 and provides it to the decoder. In other words, the recording section serves as a playback section (or reader section) for reading data from the viewpoint of playback. In terms of recording, the recording and reproducing section is a recording section that receives a signal encoded by the AV encoder 18 and records data on the optical disc 30. It is well known that a recording / playing device composed of only the recording / playing section 20 can be a “drive” that can be built in a computer.

In relation to the present invention, the recording and reproducing section 20 performs a test in the test area of the recording medium to calculate the optimum recording power and to record the calculated optimal recording power. In addition, the pickup 11 is moved along the track of the optical disc to read necessary data.

In addition, the controller 12 is responsible for controlling all the components in the optical recording and reproducing apparatus 10, and records or reproduces data on the optical disc by referring to user commands or the like through an interface with the user. The recording and reproducing command is transmitted to the recording and reproducing unit 20. In addition, networking with an external server existing in addition to the optical disk may be performed by a user command or the like.

In this regard, the controller 12 and the microcomputer 16 may be provided separately to operate. In addition, the functions of the controller 12 and the microcomputer 16 may be integrated to operate as one control unit. Hereinafter, the controller 12 and / or the microcomputer 16 will be described as a control unit. For reference, the controller may be configured of a program (software) and / or hardware provided in the optical recording / reproducing apparatus 10.

In addition, the decoder 17 decodes the signal read out from the optical disc under the control of the controller 12, restores it to desired information, and provides the same to the user. The encoder 18 performs a function of recording a signal on the optical disc. Under the control of the controller 12, the input signal is converted into a signal of a specific format, for example, an MPEG2 transport stream, and provided to the signal processor 13.

FIG. 2 illustrates the structure of a recordable optical disc to which the present invention is applicable. For example, the structure of a write-once Blu-ray disc (BD-R), which is a single recording layer, is provided for convenience of description. It is shown.

The optical disc is divided into an inner area, a data area, and an outer area sequentially from the inner circumference of the disc, and the optical recording medium is disposed in the inner area and the outer area. Management information is recorded. In addition, certain portions of the inner circumferential region and the outer circumferential region are utilized as various test regions necessary for recording / reproducing of the optical disc. Actual user data is recorded in the data area.

The structures of the inner area and the outer area will be described in more detail. The inner area includes a PIC in which recording medium management information is recorded as an embossed high frequency modulated (HFM) signal. (Permanent Information & Control data) area, OPC area used as a test area for performing OPC, and two information areas (IN1, IN2) in which various recording medium management information such as DMA (Disc Management Area) is recorded. do. The outer area also includes two other info areas IN3 and IN4 and a DCZ area for drive calibrations.

In this regard, in the case of a write once Blu-ray Disc (BD-R), the inner peripheral area further includes a temporary disc management area (TDMA) allocated adjacent to the OPC area. For reference, in the case of a rewritable Blu-ray Disc (BD-RE), an area adjacent to the OPC area remains as a reserved area which is a spare area for future use.

In addition, the inner area and the outer area include a plurality of protection zones Pr1, Pr2, and Pr3: protection zones for disc protection. In particular, the inner area and the outer area may include a plurality of protection zones. The protection zone provided inside is called "Pr1 (Protection zone 1)", and the protection zone provided at the outermost part of the outer area is called "Pr3 (Protection zone 3)", and the inner area The protection zone provided between the PIC (Permanent Information & Control data) area and the info area 2 (IN2) is referred to as "Pr2 (Protection zone 2)". In particular, the " Pr2 (Protect zone 2) " area is a kind of buffer zone for changeover utilized as a change section from the embossed HFM area to the recordable area.

In relation to this, in one recordable Blu-ray Disc (BD-R) of the present invention, data is recorded in a groove in a recording layer composed of lands / grooves included in the disc. Grooves consist of HFM modulated grooves and wobbled grooves. In particular, the wobbled groove is a wobble shape formed by modulation using a sinusoid in a groove in a recording layer, and the optical recording and reproducing apparatus 10 has a wobbled shape. Through this, the optical recording / reproducing apparatus 10 calculates address information of the corresponding groove (referred to as 'ADIP: Address In Pre-groove') and disc general information.

Fig. 3 shows another example of the structure of a recordable optical disc to which the present invention is applicable, and shows a write-once Blu-ray disc (BD-R) which is a dual recording layer. Hereinafter, the present invention will be described with the first recording layer of the dual recording layer Blu-ray Disc as the recording layer 0 (layer0; L0) and the second recording layer as the recording layer 1 (layer1; L1).

Referring to FIG. 3, in the write once dual layer Blu-ray Disc (BD-R) of the present invention, each recording layer has the same structure, and each recording layer (L0, L1) As the test area, the OPC areas OPC0 and OPC1 are included in the inner area and the DCZ areas DCZ0 and DCZ1 are respectively included in the outer area.

Therefore, when the disc is loaded into the optical recording / reproducing apparatus 10, the optical recording / reproducing apparatus 10 performs a test in the OPC area and / or the DCZ area to calculate the optimum recording power, and then records and / or reproduces the data. It becomes possible to carry out the process. That is, the recording and reproducing process is performed as in the structure of the recordable single recording optical disc of FIG.

In relation to this, a TDMA (Temporary DMA) for recording recording medium management information is provided in an inner area and / or an outer area of the optical disc described with reference to FIGS. 2 and 3. TDMA is an area used to update the defect management and recording management information of the disk while the disk is in use. In the case of a single recording layer Blu-ray disc, TDMA0 having a fixed size is included in the inner circumferential region. In the case of a dual recording layer Blu-ray disc, TDMA0 having a fixed size is fixed in the inner circumferential region of the recording layer 0. It contains TDMA1 of fixed size in the area. Additional TDMAs can be defined on the disk for more update of defect management and records management information.

Each TDMA includes a Temporary Disc Definition Structure (TDDS), a Temporary Defect List (TDFL), and information representing the recording state of the data area. According to the recording mode, the sequential recording range information (SRRI) in the case of the sequential recording mode and the space bit maps (SBM) in the case of the random recording mode are used. ) Is recorded in the TDMA as information indicating the recording state. The temporary disk definition structure contains information about the format and status of the disk, such as the spare area and the size of the TDMA, and the temporary defect list contains information about the fault status of the disk being used and the alternate cluster. It includes. In the case of a disc that is not closed, the optical recording and reproducing apparatus 10 uses the information recorded in the TDMA to reproduce data from or write data to the disc. Therefore, in recording / reproducing data, reading of information recorded in the TDMA is important.

The OPC area and TDMA will be described in detail with reference to FIG. 4, which specifically shows an embodiment of the arrangement of the OPC area and TDMA in the optical disk of the present invention.

The OPC0 area of the recording layer 0 is composed of 2048 physical clusters, 2044 physical clusters among the 2048 physical clusters are used as test zones in which actual tests are performed, and 4 physical clusters are adjacent to TDMA0 by performing tests in the test zones. It is used as an OPC0 buffer to prevent the impact of the furnace.

In this regard, the OPC1 of the recording layer 1 does not include a buffer, because there is a buffer zone in which data is not recorded adjacent to the OPC1 area. The risk of damage to the info area 2 (IN2) due to deterioration or the like occurring in a test performed in the OPC1 area by the buffer zone is prevented. In addition, as will be described in FIG. 5, since the OPC1 area is used for testing from a cluster far from the info area 2 (IN2), the risk of damage of data of the info area 2 (IN2) by performing OPC is higher than that of TDMA0. Relatively few.

Referring to FIG. 5, an embodiment of an OPC performing process according to the present invention will be described in detail. In the optical recording and reproducing apparatus 10 of the present invention, a physical sector number (PSN) of a recording medium is increased. Tracking in the direction. In other words, the physical sector number of the sectors in the recording medium increases in the tracking direction, and the direction in which the physical sector number increases in the track direction of each recording layer. On the other hand, the OPC process is performed in the opposite direction to the tracking, that is, from the sector with the large physical sector number to the sector with the small sector. After performing the OPC process, data recording to the disc is performed in a direction in which a physical sector number increases, such as in the tracking direction.

Since the OPC area is used in the reverse order of the physical sector number, in the OPC0 area, the cluster closest to TDMA0 of the 2044 physical clusters is used for the test for the OPC. On the other hand, in the OPC1 region, the cluster farthest from Info region 2 (IN2) among the 2048 physical clusters used in the test is used for the test for OPC.

It is an object of the present invention to provide a method for stably reading data recorded in an area adjacent to an OPC area. The optical recording and reproducing apparatus 10 of the present invention performs tracking for moving the pickup 11 along with the track on which the data is recorded in order to read the data recorded on the disc. At this time, the tracking does not start exactly from the recording start position, but starts before a certain distance. Not only is it difficult to track from the exact recording start position of the data because the disk is rotating, but also to perform the servo operation before reaching the recording position of the data, so that the data can be read correctly.

For example, referring to FIG. 6, which shows one embodiment of tracking for reading TDMA on an optical disk of the present invention, the optical recording / reproducing apparatus 10 is positioned before the start position of TDMA0 in order to read data of TDMA0. Tracking starts from a specific location within the OPC0 area. In this case, a signal obtained by performing OPC is generally recorded in the test zone of the OPC0 area, and tracking is affected by the signal. In the case of low-speed (1 or 2-speed) recording, since the rotational speed of the disc is not large, the influence by the signal is relatively small, and the influence can be compensated relatively easily. However, in the case of high-speed recording of 4 times or more, the servo becomes unstable if the signal recorded in the test zone of the OPC0 area is too large because of the rotational speed of the disk itself. As a result, there may be a case where the tracking is unstable and an error occurs and the movement of the pickup 11 itself is impossible. For example, an error may occur before the pickup 11 reaches TDMA0, which may result in failure to read the data of the TDMA access indicator recorded at the beginning of TDMA0, resulting in failure to recognize the disk itself. Accordingly, the present invention seeks to provide a method for more stably recognizing data recorded in TDMA0.

7A and 7B illustrate embodiments of an OPC region and tracking method according to the present invention, in which tracking is initiated in the OPC0 buffer rather than the test zone of OPC0.

Referring to FIG. 7A, '4 + x' physical clusters among 2048 physical clusters of an OPC0 region are used as the OPC0 buffer. 'X' is a positive integer of 1 or greater. According to the present invention, the size of the test zone in OPC0 becomes smaller than the 2044 physical cluster. '4 + x' is the number of clusters sufficient for tracking to begin in the OPC0 buffer. The size of the OPC0 buffer for stable tracking will be affected by the double speed and the implementation of the optical recording / reproducing apparatus 10. However, in the case of 4x recording, the tracking will start in the OPC0 buffer if the size of the OPC0 buffer is about 16 physical clusters. Could be. As a result, if 16 physical clusters are required to start tracking in the OPC0 buffer at 4x writing, 16 physical clusters can be allocated to the OPC0 buffer and 2032 physical clusters can be allocated to the test zone.

When the recording is to be performed on the disk, the microcomputer 16 calculates the TDMA0 position and moves the pickup 11 to the rotating disk. According to the present invention, the pickup starts tracking in the OPC0 buffer, and since the data is not recorded in the OPC0 buffer, the tracking is stabilized so that necessary information can be read from the TDMA0.

Referring to FIG. 7B, the embodiment of FIG. 7B starts tracking for reading TDMA0 in the OPC0 buffer similarly to the embodiment of FIG. 7A, but does not increase the size of the OPC0 buffer by reducing the test zone by the increased size. The difference is that the size of the OPC0 region increases.

Specifically, in the info area 2 (IN2), the buffer 2 exists as a buffer area adjacent to the OPC0 area to avoid the influence of the test performed in the OPC0 area. By reducing the size of the buffer 2 and using it as a test zone of the OPC0 region, it is possible to secure an OPC0 buffer necessary for stable tracking without reducing the size of the test zone.

With respect to the embodiment of Figs. 7A and 7B, the distance between the recording start position of the target data and the tracking start position necessary for stable tracking depends on the recording speed of the data. At higher speeds, the servo becomes unstable, so at higher speeds the tracking needs to start earlier than the target position. Eventually, in order to be less affected by large signals recorded in the test zone, higher OPC0 buffers will be needed. The size of the OPC0 buffer may be allocated to a sufficient degree in consideration of all recordable recording speeds, or may be allocated differently according to the recording speed. If the size of the OPC0 buffer differs from disk to disk, the recordable speed will also vary depending on the size of the OPC0 buffer allocated to each disk.

8 illustrates another embodiment of the structure and stable tracking method of the optical disk according to the present invention, in which the OPC0 area is allocated to sectors having a physical sector number greater than TDMA0.

Referring to Fig. 6, pickup 11 starts tracking in the OPC0 area to reach TDMA0. Accordingly, the signal recorded in the test zone in the OPC0 area affects the tracking. Thus, the present invention assigns the OPC0 area to sectors with a larger physical sector number than the TDMA0 area as shown in FIG. 8 so that the pickup 11 does not start tracking in the OPC0 area.

Referring to FIG. 8, when the positions of the OPC0 region and the TDMA0 are changed in the opposite manner to those of FIG. 4, sectors constituting the OPC0 region have a higher physical sector number than sectors constituting the TDMA0. The OPC0 region further includes, for example, a buffer having a size of 4 physical clusters (hereinafter, OPC0 buffer1) between the TDMA0 and the test zone. Like the OPC0 buffer originally included in the OPC0 region, the OPC0 buffer 1 serves to prevent an influence such as degradation caused by OPC from affecting other regions.

According to the present invention, when the microcomputer 16 controls to read the data recorded in the TDMA0, the tracking will be started in the buffer 2 of the info area 2. As a result, not only does not go through the test zone of the OPC0 area but also starts tracking in the buffer 2 in which no data is recorded, so that the pickup 11 is stable, and thus it is possible to safely reach TDMA0 than when passing through the test zone. In addition, even if the tracking is started before the buffer 2, the tracking will be started in the area including the data recorded as the signal which is more stable than the signal recorded in the test zone of the OPC0 area. The pickup 11 will safely reach the TDMA0.

In connection with this, when the data of TDMA1 should be read, since the tracking will start from the reserved area where data recording is reserved, the positions of TDMA1 and the reserved area of recording layer 1 are not changed.

In this regard, the present invention uses the OPC0 area of the recording layer 0 included in the single recording layer and the dual recording layer as an example for convenience of explanation, but is applicable to a disc including more than two recording layers. In addition, it will be apparent that the present invention can be applied to a case in which a multi-layer recording disk has a recording layer having an arrangement similar to that of the recording layer 0, that is, a recording layer in which data is recorded adjacent to the test area. will be.

According to the present invention, the tracking is less affected by the signal recorded in the test zone of the OPC area, so that the movement of the pickup 11 is stabilized. Further, as the tracking is stabilized, the possibility of failing to recognize the data recorded in the TDMA is reduced.

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention. .

According to the recording medium, the recording medium area allocation method, the management information reading method, and the apparatus according to the present invention described above, the tracking is stable, so that the data in the recording medium can be stably reproduced or the data can be recorded on the recording medium. There is an advantage.

Claims (26)

A recording medium comprising at least one recording layer in which a test area and a recording medium management information area are continuously allocated. The test area includes a test zone in which the test signal is physically allocated to the front of the recording medium management information area and is adjacent to the test zone in which a test signal is recorded, and in which the test signal is not recorded. And the test area buffer is allocated to a size such that tracking for the recording medium management information area can be started in the test area buffer. The method of claim 1, Wherein said tracking proceeds from a physically preceding sector to a later sector of said recording layer. The method of claim 1, The size of the test area buffer is allocated as the recording speed increases. The method of claim 1, And the test area buffer comprises more than four physical clusters. The method of claim 1, And the test area is an optimal power control area. The method of claim 5, wherein The optimal power control region is composed of a fixed number of physical clusters, and the test zone is composed of physical clusters subtracting the physical clusters constituting the test region buffer from the fixed number of physical clusters. Recording medium. The method of claim 5, wherein Wherein the test zone is composed of a fixed number of physical clusters, and the optimal power control region is composed of a sum of physical clusters constituting the test zone and physical clusters constituting the test region buffer. media. The method of claim 1, And the recording medium management information area is a temporary disc management area. The method of claim 1, And the recording medium is a write once disc. A recording medium comprising at least one recording layer in which a test area and a recording medium management information area are continuously allocated. The test area includes a test zone in which the test signal is physically allocated to the front of the recording medium management information area, the test zone in which a test signal is recorded, and a test area buffer adjacent to the recording medium management information area and in which the test signal is not recorded. And the test area buffer is allocated in different sizes according to the recording speed. In a recording medium including at least one recording layer, the recording layer, A test area in which a test for recording and / or reproducing the recording medium is executed; And And a recording medium management information area in which management information for the recording medium is recorded. And the recording medium management information area is allocated on an inner circumferential side of the recording layer rather than the test area. The method of claim 11, And the test area is an optimum power control area. The method of claim 11, And the recording medium management information area is a temporary disc management area. The method of claim 11, And the test area is allocated adjacent to the recording medium management information area. A method for allocating a test area and a recording medium management information area to at least one recording layer included in a recording medium, Assigning the test area and the recording medium management information area consecutively, and allocating the test area physically ahead of the recording medium management information area, Allocating a test zone in which a test signal is recorded and a test area buffer in which the test signal is not recorded while the test zone is adjacent to the recording medium management information area, wherein the test area buffer is configured to track the recording medium management information area. A recording medium area allocation method, wherein the recording medium area is allocated to a size that can be started from the test area buffer. The method of claim 15, And the tracking proceeds from a physically preceding sector to a later sector of the recording layer. The method of claim 15, And a size of the test area buffer is larger as the recording speed increases. The method of claim 15, And the test area buffer is allocated to more than four physical clusters. The method of claim 15, The test region is an optimal power control region composed of a fixed number of physical clusters, And the test zone includes physical clusters subtracting the fixed number of physical clusters from the physical clusters constituting the test area buffer. The method of claim 15, The test area is an optimum power control area, And the optimal power control region is configured by the sum of a fixed number of physical clusters constituting the test zone and the physical clusters constituting the test region buffer. The method of claim 15, And the recording medium management information area is a temporary disc management area. A recording medium including at least one recording layer, comprising: a test area in which a test for recording and / or reproduction of the recording medium is performed in the recording layer and a recording medium management information area in which management information for the recording medium is recorded; , But And assigning the recording medium management information area to an inner circumferential side of the recording layer rather than the test area. The method of claim 22, And the test area is an optimum power control area and the recording medium management information area is a temporary disc management area. The method of claim 22, And the test area is allocated adjacent to the recording medium management information area. A method of reading management information recorded in the recording medium management information area from a recording layer in which at least one test area and a recording medium management information area, which are included in a recording medium, are continuously allocated, the method comprising: Confirm the location of the recording medium management information area; Start tracking in the test area allocated physically ahead of the recording medium management information area, And the tracking is started in the test buffer area of the test zone and the test buffer area constituting the test area, adjacent to the recording medium management information area and in which no test signal is recorded. An apparatus for reproducing management information recorded in the recording medium management information area from a recording layer in which at least one test area and a recording medium management information area, which are included in a recording medium, are continuously allocated, A reader unit for reading data from the recording medium; And And a control unit which checks the position of the recording medium management information area and controls the reader to read out management information recorded in the recording medium management information area. The control unit includes a test buffer area in which a test signal is not recorded while being adjacent to the recording medium management information area, among test zones and test buffer areas constituting the test area, which are physically assigned to the recording medium management information area. And controlling the reader unit to start the tracking in the management information reading device.

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