KR20050072033A - Optical recording medium, disk management apparatus/method and computer readable recording medium storing for a program for performing the method - Google Patents

Abstract

Disclosed is an optical record information storage medium, a disc management apparatus, a disc management method and a computer readable recording medium having recorded thereon a program for performing the method.

An optical record information storage medium according to the present invention includes at least one layer, each layer having an area for at least one recording condition test, wherein each recording condition test area is used successively, respectively. According to the present invention as described above, it is possible to efficiently use and manage the PCA area provided in the recording medium, and further, to quickly find the position where the drive can test the recording conditions without having to scan the entire PCA area every time. Can be.

Description

Optical recording medium, disk management apparatus / method and computer readable recording medium storing for a program for performing the method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of disks, and more particularly, to an optical record information storage medium, a disk management apparatus, a disk management method, and a computer readable recording medium having recorded thereon a program for performing the method.

Optical information recording technology, that is, a technique of recording data on a recordable optical disc, has recently undergone remarkable growth. In addition to these improvements, various types of optical disc recording / reproducing apparatuses have also been developed.

A write once optical disc refers to an optical disc in which data can be recorded only once. Such write-once optical discs have conventionally been, for example, CD-R and DVD-R. In the write once optical disc, heat is applied to a predetermined portion of the recording layer with laser light to deform the image of the recording layer to generate recording marks. Since the deformed portion cannot be returned to its original state before the laser light is applied, the write once optical disc can only be written once.

On the other hand, in order for a disk drive to write data to the disk, it must know the appropriate power for the disk and drive status. This is because the disc and the drive manufacturer have some differences in the proper power for the recording. By finding the optimum power for each disc and drive and recording at the optimum power, the playback quality can be maintained when the data is reproduced after recording. To do this, the information storage medium provides a Power Calibration Area (PCA) to test the recording conditions so that each drive can find the optimal recording conditions for that drive.

However, in the case of a write-once medium, it is necessary to efficiently use and manage the PCA area occupying space because of the property that data can be written only once on the medium, and that data cannot be overwritten, erased, or rewritten. There is also a need for a way to quickly find a location where each drive can test the recording conditions without having to scan the entire PCA area each time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical recording information storage medium, a disk management apparatus, a disk management method, and a computer readable recording medium having recorded thereon a program for performing the method for efficiently managing a recording condition test area on a disk. It is done.

One feature of the present invention for solving the above problems is an optical recording information storage medium, wherein the medium includes at least one layer, each layer having an area for at least one recording condition test. Each recording condition test area is used successively, respectively.

The medium preferably further includes a disc management area in which disc management information including testable position information capable of testing a recording condition in each of the recording condition test areas is recorded.

Another aspect of the present invention is a disc management apparatus for recording / reproducing data on an optical recording information storage medium including at least one layer, each of which comprises an area for at least one recording condition test provided in each layer. It includes a control unit for controlling to use continuously.

A further aspect of the present invention is a disc management method for recording / reproducing data on an optical recording information storage medium including at least one layer, each of which comprises an area for testing at least one recording condition provided in each layer. Controlling to use continuously.

A further aspect of the present invention is a computer-readable recording medium having a program recorded thereon that executes a disk management method when recording / reproducing data on an optical recording information storage medium including at least one layer. And controlling each successive use of the area for at least one recording condition test provided in each of the layers, and a testable position information capable of testing the recording condition in each of the respective recording condition test areas. Recording management information in a disc management area provided on the medium.

The present invention will now be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a configuration of a recording / reproducing apparatus according to the present invention.

Referring to FIG. 1, the recording / reproducing apparatus includes a recording / reading unit 2 and a control unit 1.

The recording / reading section 2 is provided with a pickup or the like to record data on the disk 4, which is an optical recording information storage medium according to the present invention, and reads the recorded data.

The control unit 1 controls to record and read data on the disc 4 according to a predetermined file system. In particular, according to the present invention, the control unit 1 controls to continuously use the space in the PCA area provided with at least one of the disks, and also to quickly find the next available position in the PCA area. Control to record the next available position information in the disc management area provided on the disc as the disc management information.

The control unit 1 includes a system controller 10, a host I / F 20, a DSP 30, an RF AMP 40, and a servo 50.

In writing, the host I / F 20 receives a predetermined write command from the host 3 and sends it to the system controller 10. The system controller 10 controls the DSP 30 and the servo 50 to carry out the write command received from the host I / F 20. The DSP 30 adds additional data such as parity for error correction to the data to be recorded received from the host I / F 20 and performs ECC encoding to generate an ECC block, which is an error correction block, and then, in a predetermined manner. Modulate. The RF AMP 40 converts the data output from the DSP 30 into an RF signal. The recording / reading section 2 provided with the pickup records the RF signal transmitted from the RF AMP 40 on the disc 4. The servo 50 receives a command necessary for servo control from the system controller 10 to servo control the pickup of the recording / reading unit 2.

In particular, according to the present invention, the system controller 10 includes a recording condition testing unit 11, a disc management information recording processing unit 12, and a disc management information reading processing unit 13 to perform disc management related to recording condition testing. And a buffer memory 14.

In the case where the recording conditions for the disk must be tested for reasons such as the disk being inserted into a new drive, the disk management information reading processing unit 13 reads the disk management information from the disk management area provided in a part of the disk and buffers it. It stores in the memory 14. This disk management information includes information on the next testable position in the PCA area.

The recording condition test unit 11 extracts the next testable position information of the PCA area from the disc management information stored in the buffer memory 14, and uses the extracted testable position information to determine the testable position in the PCA area of the disc. Control to find and test recording conditions. The optimal recording condition is stored in the buffer memory 14 as a result of the recording condition test.

The disc management information recording processing unit 12 records the optimal recording condition stored in the buffer memory 14 in a predetermined area of the disc, and also allows the next test in the PCA area so that the testable position can be found quickly in the next recording condition test. Control to record possible positional information in the disc management area as the disc management information.

At the time of reproduction, the host I / F 20 receives a reproduction command from the host 3. The system controller 10 performs initialization necessary for regeneration. The recording / reading section 2 outputs an optical signal obtained by irradiating a laser beam on the disk 4 and receiving a laser beam reflected from the disk 4. The RF AMP 40 converts an optical signal output from the recording / reading section 2 into an RF signal and provides modulated data obtained from the RF signal to the DSP 30, while providing a servo signal for control obtained from the RF signal. Provided to the servo 50. The DSP 30 demodulates the modulated data and outputs data obtained through ECC error correction. On the other hand, the servo 50 receives the servo signal received from the RF AMP 40 and the command required for the servo control received from the system controller 10 to perform servo control for the pickup. The host I / F 20 sends data received from the DSP 30 to the host. The system controller 10 controls the servo to read data from the position where the data is recorded for reproduction control.

The structure of the optical record information storage medium according to the present invention will now be described.

Disc Management Information (DMI) recorded on the optical recording information storage medium according to the present invention includes a Disc Definition Structure (DDS), Recording Management Data (RMD), and a Defect List. : DL). The Disc Management Area (DMA) for recording disc management information is largely divided into a temporary disc management area (TDMA) and finalized disc management for recording the disc management information while the disc is being used. It consists of a finalized disc management area (FDMA) for recording information.

The TDMA for temporarily recording the disc management information while using the disc includes a DDS / RMD area for recording DDS and RMD and a DL area for recording DL.

The DDS includes a replacement block for replacing a defective block in the data block recorded in the data area, location information of the SA / DL area where the DL is recorded, location information of the DDS / RMD area, location information where the DL is recorded, and SA / Location information available for replacement in the DL area or for updating the DL, a consistency flag for checking whether the disk was ejected normally during the previous use, a write protection information for preventing the write, and the like.

The RMD is information for management of data recorded on a disc. The RMD includes R-zone entries indicating a state of each R-zone in a sequential recording mode and a random recording mode. And a bitmap indicating the presence or absence of data recording for each recording unit block of the user area in bit values.

The DDS / RMD area for recording such DDS and RMD is provided in the lead-in or lead-out in a single recording layer disc, and in the lead-in or intermediate area or lead-out in a double recording layer. In addition, the DDS / RMD area may be allocated to a part of the data area to increase the number of updateable times of the DDS / RMD according to the intention of the drive manufacturer or the user at the time of initializing the disk.

If the data can no longer be written to the disc, or if the user wants to keep the current disc state and use it only for playback without recording additional data, the disc is finalized. It is recorded in the final disk management area (FDMA).

The PCA area is a test area for testing to find the optimal recording power and the variables according to the recording method by testing with various recording powers according to the write strategy.

      2 shows an example of a disc structure diagram of a single recording layer disc according to the present invention.

Referring to FIG. 2, the disc has a lead-in area at its inner circumference, a lead-out area at its outer circumference, and a data area at its center.

The lead-in area includes PCA # 0, FDMA # 1, FDMA # 2, and DDS / RMD area # 0, and the data area includes the user area, the SA / DL area # 0, and the SA / DL area # 1. The out area includes PCA # 1, FDMA # 3, FDMA # 4, and DDS / RMD area # 1.

As described above, the PCA areas, PCA # 0 and PCA # 1, are tested for various recording powers according to the write strategy to find the optimal recording power and the variables according to the recording method. The DDS / RMD area is an area in which the positional information on the disk on which various disk management information areas are arranged and information for recording management of data recorded on the disk are recorded.

 Hereinafter, as will be described in detail, in the present invention, information about a testable location in the PCA area is recorded in the DDS / RMD area.

3 shows an example of a disc structure diagram of a dual recording layer disc according to the present invention.

Referring to FIG. 3, a lead-in area, a data area # 0, and an intermediate area # 0 are provided in one recording layer L0, and the intermediate area # 1, the data area # 1, and the lead-out area are continuously arranged in another recording layer L1. Prepared.

The lead-in area of the L0 layer includes PCA # 0, FDMA # 2, DDS / RMD area # 0, FDMA # 1, the data area includes SA / DL area # 0, user area # 0, and middle area # 0 includes FDMA # 3, DDS / RMD region # 2, FDMA # 4, and PCA # 1. Middle region # 1 of the L1 layer includes FDMA # 3, DDS / RMD region # 3, FDMA # 4, PCA # 3, data region # 1 includes SA / DL region # 1, user region # 1, The lead-out area includes PCA # 2, FDMA # 2, DDS / RMD area # 1, and FDMA # 1.

As shown in Figs. 2 and 3, there are two power calibration areas (PCAs) in each recording layer.

It is desirable to manage the space efficiently and to manage the next available test position pointer by continuously using the PCA for finding the proper recording power because it cannot be erased and reused due to the characteristics of the recording medium once.

Appropriate optical power control is required to record data on the disk for host command or disk management. In addition, in a medium having one or more recording layers, it is necessary to find the optical power suitable for each recording layer appropriately in the PCA in each recording layer. Therefore, it is desirable to separately manage the next available test position information for each layer of the medium and for each PCA in each layer.

In addition, as shown in FIG. 2 and FIG. 3, when PCA exists in each of the inner and outer circumferences of each layer, if only one next test position pointer is managed, the current pickup is located in the inner circumference of the disc. If the test location pointer points to a PCA in the outer periphery, it will take a long time to access the PCA in the outer periphery, which will result in performance degradation of the system. Therefore, it is desirable to separately manage pointers to each PCA area within each layer as well as within each layer to find the appropriate recording optical power at the next available test location of the PCA in the near area. The pointer indicating the next available position in the PCA area is preferably recorded in the DDS / RMD area as the disc management information, that is, as the information of the RMD for recording management or as the information of the DDS.

4 is a reference diagram for explaining a use direction and testable position information of a recording condition test area according to the present invention.

Referring to FIG. 4, in the disk area, a PAC # 0, a DDS / RMD area, a user area, and a PCA # 1 are illustrated for convenience of description.

In PCA # 0, the available position is ① when the PCA # 0 area is not used at all. If the area ?? including the usable position 1 is used by the first recording condition test, the next available position in PCA # 0 is?. The next continuous recording condition test is used to test the successive recording conditions. When the second recording condition test is complete, the next available position in PCA # 0 is ③.

In PCA # 1, the available position is ④ when the PCA # 1 area is not used at all. Area including the available position ④ by a third recording condition test ?? Is used, the next available position in PCA # 1 is ⑤.

In this way, the next available position in PCA # 0 is ③ and the next available position in PCA # 1 is ⑤ with the third recording condition test completed.

In the present invention, at least one PCA area is provided on the disk, and the space for the test of the recording conditions is continuously used in each PCA area. In particular, the PCA area can be efficiently used in one recording medium.

Further, as described with reference to Fig. 5, by recording the next testable position information in such a PCA region, the next testable position in the PCA region can be quickly found.

FIG. 5 is a reference diagram for explaining a DDS / RMD area in which testable position information is recorded according to the use of the recording condition test area shown in FIG. 4.

Referring to FIG. 5, DDS / RMD #i, DDS / RMD # i + 1, DDS / RMD # i + 2, and DDS / RMD # i + 3 are recorded in the DDS / RMD area.

For example, as shown in FIG. 4, when neither PCA # 0 nor PCA # 1 is used, the DDS / RMD #i includes ① as the next testable position information of PCA # 0 and the next test of PCA # 1. (4) is recorded as possible position information.

Next, in the case where the area ?? is used after the first recording condition test is performed in PCA # 0, ② as the next testable position information of PCA # 0 is DDS / containing ④ as the next testable position information of PCA # 1. RMD # i + 1 is recorded.

Next, in the case where the area ?? is used because the second recording condition test is performed in PCA # 0, ③ as the next testable position information of PCA # 0, DDS / containing ④ as the next testable position information of PCA # 1. RMD # i + 2 is recorded.

Next, when the third recording condition test is performed in PCA # 1 and the area ?? is used, DDS / containing ⑤ as next testable position information of PCA # 1 and ③ as next testable position information of PCA # 1 are used. RMD # i + 3 is recorded.

In this way, by recording the location information available in each PCA area, the recording condition should be tested by inserting a disc into a new drive, and thus, when the recording condition test area needs to be found, the drive reads all the PCA areas. It is possible to quickly find a testable location in the PCA area with the next testable location information as above without having to look for recorded and unrecorded areas.

6 is a data structure diagram of the DDS / RMD region shown in FIG. 3 according to the present invention.

Referring to FIG. 6, the DDS / RMD region includes DDS / RMD # 0, DDS / RMD # 1, ... DDS / RMD #n.

DDS / RMD # 0 contains the next testable location information of PCA #i. The detailed structure of the DDS / RMD #i is shown in FIG.

FIG. 7 shows an example of a data structure diagram of the DDS / RMD block shown in FIG. 6 according to the present invention.

Referring to FIG. 7, the DDS / RMD #i 100 includes a DDS 200 and an RMD 300.

The DDS 200 includes next testable position information 210 of PCA # 0, next testable position information 220 of PCA # 1, next testable position information 230 of PCA # 2, and PCA # 3. Next testable location information 240.

As described above, the DDS is a block including the location information of the spare area, the location information of the defect list, the location information of the DDS / RMD area, and the like. The next testable location information in the PCA area is the DDS together with the above location information. Can be included.

8 shows another example of the data structure diagram of the DDS / RMD block shown in FIG. 6 according to the present invention.

Referring to FIG. 8, the DDS / RMD #i 100 includes a DDS 200 and an RMD 300.

The RMD 300 includes next testable location information 310 of PCA # 0, next testable location information 320 of PCA # 1, next testable location information 330 of PCA # 2, and PCA # 3. Next testable location information 340.

As described above, the RMD is a block containing information managed by the drive for recording data on the disk, and the next testable position information in the PCA area may be included in the RMD along with such recording management information.

9 is a flowchart illustrating a process of the disc management method according to the present invention.

In the case where a drive needs to be tested for recording conditions to allow the drive to optimally write data to the disc, for example, because a disc is inserted into a new drive, first, the disc management information reading processing unit 13 performs a part of the disc. The disk management information is read out from the disk management area provided in the storage device 14 and stored in the buffer memory 14 (910). This disk management information includes a plurality of pieces of information, including the next testable position information in the PCA area.

The recording condition test unit 11 extracts the next testable position information of the PCA area from the disc management information stored in the buffer memory 14 (920), and can be tested in the PCA area of the disc according to the extracted testable position information. The control is performed to find the location and test the recording condition (930). Since the specific recording condition test method is beyond the scope of the present invention, a detailed description thereof will be omitted. The optimal recording condition is stored in the buffer memory 14 as a result of the recording condition test.

The disc management information recording processing unit 12 records the optimal recording condition stored in the buffer memory 14 in a predetermined area of the disc, and also allows the next test in the PCA area so that the testable position can be found quickly in the next recording condition test. The location information is controlled to be recorded in the disc management area as the disc management information (940). As described above, the next testable location information in this PCA area is included in the DDS or RMD and recorded in the DDS / RMD area as shown in FIGS. 7 and 8.

In the above description of the present invention, the description has been made mainly on the one-time recording information storage medium. Although the present invention is effectively applied to a storage medium that can be recorded only once, such as a one-time recording information storage medium, the present invention is not limited thereto but may be applied to any kind of recording medium.

The disc management method as described above can also be embodied as computer readable code on a computer readable recording medium. Computer-readable recording media include all kinds of recording media on which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the disk management method may be easily inferred by programmers in the art to which the present invention belongs.

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. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. 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.

According to the present invention as described above, it is possible to efficiently use and manage the PCA area provided in the recording medium, and furthermore, it is possible to quickly and quickly scan the PCA area of each drive at a position where each drive can test the recording conditions. You can find it.

1 is a schematic block diagram of a configuration of a recording / reproducing apparatus according to the present invention;

2 is an example of a disc structure diagram of a single recording layer disc according to the present invention;

3 is an example of a disc structure diagram of a dual recording layer disc according to the present invention;

4 is a reference diagram for explaining a use direction and testable position information of a recording condition test area according to the present invention;

5 is a reference diagram for explaining a DDS / RMD area in which testable position information is recorded according to the use of the recording condition test area shown in FIG. 4;

6 is a data structure diagram of the DDS / RMD region shown in FIG. 3 according to the present invention;

7 is an example of a data structure diagram of a DDS / RMD block shown in FIG. 6 according to the present invention;

8 is another example of a data structure diagram of the DDS / RMD block shown in FIG. 6 according to the present invention;

9 is a flowchart illustrating a process of the disc management method according to the present invention.

Claims (7)

An optical record information storage medium, The medium comprises at least one layer, each layer having an area for at least one recording condition test, And each recording condition test area is used successively, respectively. The method of claim 1, And a disc management area in which disc management information including testable position information capable of testing recording conditions in each of said recording condition test areas is recorded. A disc management apparatus for recording / reproducing data on an optical record information storage medium including at least one layer, And a control unit for controlling to continuously use at least one area for testing at least one recording condition provided in each layer. The method of claim 3, The control unit, And further control to record the disc management information including the testable position information capable of testing the recording condition in each of the recording condition test areas in the disc management area provided in the medium. A disc management method in recording / reproducing data on an optical recording information storage medium including at least one layer, And controlling each of the areas for at least one recording condition test provided in each layer to be continuously used. The method of claim 5, And recording disc management information including testable position information capable of testing recording conditions in each of the recording condition test areas in a disc management area provided on the medium. A computer-readable recording medium having recorded thereon a program for performing a disc management method when recording / reproducing data on an optical record information storage medium including at least one layer, the disc management method comprising: Controlling each area of the at least one recording condition test provided in each layer to be continuously used; And recording disc management information including testable position information capable of testing recording conditions in each of the recording condition test areas in a disc management area provided in the medium.