KR20050034999A - Information storage medium and method and apparatus for recording on and/or reading from the same - Google Patents

Abstract

Disclosed are an information storage medium and a method / apparatus for recording / reproducing data.

In the disclosed information storage medium, reproduction-only data is wobbly recorded in a groove in one of a lead-in area, a user data area, and a lead-out area, and the reproduction-only data is at least one of the lead-in area and the lead-out area. A copy is recorded in the area.

Since the above configuration does not need to provide a separate area for reproduction-only data, it is possible to secure a maximum recording area in which user data can be recorded, which can be usefully applied to a compact information storage medium.

Description

Information storage medium and method and apparatus for recording and reproducing data {information storage medium and method and apparatus for recording on and / or reading from the same}

The present invention relates to a small information storage medium which secures as much data recording area as possible and increases its recording capacity, and a method and apparatus for recording / reproducing data.

In general, an information storage medium is widely used as an information recording medium of an optical pickup apparatus that records / reproduces information in a non-contact manner. An optical disk, which is a type of information storage medium, is a compact disk (CD) or a digital disk according to an information recording capacity. It is divided into a digital versatile disk (DVD). In addition, optical discs capable of recording, erasing and reproducing include 650MB CD-R, CD-RW, 4.7GB DVD + RW, and the like. Furthermore, HD-DVDs with a recording capacity of 20GB or more are being developed.

On the other hand, the demand for information storage media for mobile is increasing day by day. For such mobile use, research and development on the miniaturization of information storage media are in progress. There are many problems to be solved for miniaturization of information storage media, but it is one of the important problems to compensate for the reduction of recording capacity.

1A shows a layout of a data area of a conventional information storage medium. The conventional information storage medium includes a burst cutting area (BCA) area 10, a lead-in area 15, a user data area 20, and a lead-out area 25.

The lead-in area 15 may include a control data area 15a, an OPC (Optimal Power Control) area 15b, and a disc information area 15c. The lead-out area 25 may include a buffer area. have. In the outermost peripheral area of the information storage medium, an unused area 26 is formed which becomes unavailable during the disc manufacturing process.

In the control data area 15a, unchanging information such as a disc size, a version number, the number of recording layers, and the like are recorded as reproduction only data. Such reproduction-only data is recorded in pits or wobbles. The recording with wobble takes more recording capacity than when the read-only data is recorded in pits, and takes more time when reading information recorded with wobble.

1B illustrates an example in which the control data area is provided in both the lead-in area 15 and the lead-out area 25. The lead-out area 25 includes a buffer area 25a and a control data area.

As the number of other areas provided in the read-only data (control data area) or lead-in area as described above decreases, the recording capacity of the user data area decreases. As the information storage medium becomes smaller, the lead-in area or lead-out area decreases. We need to find a way to do it.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a compact information storage medium and a method and apparatus for recording / reproducing data which can secure a wide recording area as much as possible.

In order to achieve the above object, the information storage medium according to the present invention is a recordable information storage medium including a lead-in area, a user data area, a lead-out area,

Reproduction-only data is wobbly recorded in a groove in one of the lead-in area, the user data area, and the lead-out area, and the reproduction-only data is copied and recorded in at least one of the lead-in area and the lead-out area. It features.

The lead-in area, user data area, and lead-out area are all formed with grooves.

The lead-in area and lead-out area consist only of a recordable area.

Copy recording of the read only data is preferably performed when the information storage medium is first inserted into a drive.

The read only data may be disk related data or disk control data.

In order to achieve the above object, a recording / reproducing method of data according to the present invention is a method of recording / reproducing data on a recordable information storage medium including a lead-in area, a user data area, and a lead-out area.

Wobble recording reproduction-only data into a groove in one of the lead-in area, the user data area and the lead-out area; Copying the reproduction-only data to at least one of the lead-in area and the lead-out area; Reproducing the copy-recorded data when recording or reproducing the data on the information storage medium.

In order to achieve the above object, an apparatus for recording / reproducing data according to the present invention is an apparatus for recording / reproducing information on an information storage medium.

A recording / reading unit for copying and recording reproduction-only data recorded with groove wobbles on the information storage medium; And a control unit which controls the recording / reading unit to read data information copied and recorded on the information storage medium and record / reproduce user data according to the information.

Hereinafter, an information storage medium and a method and apparatus for recording / reproducing data according to the present invention will be described in detail with reference to the accompanying drawings.

An information storage medium according to a preferred embodiment of the present invention is a recordable information storage medium. Referring to FIG. 2A, the lead-in area 50, the user data area 60, and the lead-out area 70 from the inner circumference of the information storage medium. ). In addition, a BCA region 45 may be further provided on an inner circumferential side of the lead-in region 50.

The BCA area 45 is an area provided on the inner circumferential side of the area (lead-in area) where information starts to be recorded. The BCA area 45 may include a mirror area or a pit or groove.

The lead-in area 50 is a recordable area and includes an OPC (Optimal Power Control) area 50a for testing an optimal recording / reproducing power, a retention area 50b, and a disc information area 50c. The lead-in area 50 is not provided with an area in which read-only data is recorded.

The reserved area 50b is an area in which no data is recorded when the information storage medium is manufactured, but in which data can be recorded later if necessary.

In the disc information area 50c, for example, defect management information, drive related information, disc information (for example, the address of the data area where recording was last made), recording protection information, etc. Information updated together may be recorded.

The lead-out area 70 includes a buffer area 70a and a retention area 70b, and an unused area 71 is provided on an outer circumference of the lead-out area 70.

The information storage medium according to the present invention is a small information storage medium, and can be applied, for example, for mobiles having a total diameter of 35 mm or 46 mm. For example, in case of recording 4.7 GB corresponding to DVD capacity on a 46 mm diameter disc, the following configuration can be achieved. The minimum mark length is 0.119 mu m, the ECC block size is 64 KB, and the track pitch is 0.32 mu m. Then, the RLL (1,7) modulation scheme is adopted, and the start radius of the pick accessible region is 8 mm.

The lead-in area 50, the user data area 60, and the lead-out area 70 are all formed of grooves, and the entire area is made of a recordable area.

Referring to FIG. 2B, a wobble (w) is formed in a groove 55 of at least one of the lead-in area 50, the user data area 60, and the lead-out area 70, and the wobble (w) Playback-only data is recorded in the. For example, the reproduction-only data may be recorded as groove wobbles in the lead-in area 50 or groove wobbles in the user data area 60.

The reproduction-only data may be, for example, control data or disk related data. The control data or disc related data may be, for example, unchanging data about the disc such as disc size, version number, number of information storage layers, or recording related data such as write strategy parameters or recording speed.

In the present invention, since reproduction-only data such as disc-related data or control data is recorded in the groove wobble, a separate reproduction-only area does not need to be provided.

On the other hand, it is preferable that reproduction-only data recorded in the groove wobble is copied and recorded in at least one of the lead-in area 50 and the lead-out area 70. In other words, when the information storage medium is inserted into the data recording / reproducing apparatus for recording or reproducing data on the information storage medium, the read-only data recorded in the groove wobble is the lead-in area 50 or the lead-out area. The copy is made to 70. Thus, the next time the information storage medium is used, recording / reproducing can be performed by using the copied and recorded data.

When the same amount of information is recorded, recording in the recordable area takes less capacity and requires less data reproduction time than when recording with groove wobbles. Therefore, reading the data recorded in the lead-in area or the lead-out area in comparison with reading the data recorded in the groove wobble form has the advantage of reducing the reproduction time.

Copy recording of the read-only data may be performed when the information storage medium is first inserted into a recording / reproducing apparatus (drive). After the reproduction-only data is copied and recorded, the copy-only reproduction-only data is reproduced to perform data recording / reproduction without the need to reproduce the data recorded with the groove warp when the information storage medium is used. Therefore, the information required for recording / reproducing data can be recorded in the minimum recording area, and the time required for reproducing this information can be minimized.

Copy recording of the read-only data may be made in the reserved area 50b of the lead-in area 50 or the reserved area 70b of the lead-out area 70, and the copy recording is performed to increase the reliability of the copied data. You can record repeatedly. Alternatively, copy recording may be repeatedly recorded in both the lead-in area 50 and the lead-out area 70, or may be repeatedly recorded in each area a plurality of times. By repeatedly recording in this way, even if any one data is damaged by a scratch, fingerprint or the like, the other data can be read.

Next, the information storage medium according to the present invention can be applied to an information storage medium having a plurality of information storage layers. FIG. 3 shows an information storage medium having a first storage layer L0 and a second storage layer L1.

Each of the first storage layer L0 and the second storage layer L1 includes the BCA regions 45_L0 and 45_L1, the lead-in regions 50_L0 and 50_L1, the user data region 60_L0 and 60_L1, and the lead-out region, respectively. 70_L0) and 70_L1. Reference numerals 71_L0 and 71_L1 denote unused areas.

The lead-in areas 50_L0 and 50_L1 include OPC areas 50a_L0, 50a_L1, reserved areas 50b_L0, 50b_L1, and disc information areas 50c_L0 and 50c_L1, and the lead-out areas 70_L0 ( 70_L1 includes buffer areas 70a_L0 and 70b_L1 and reserved areas 70b_L0 and 70b_L1.

Here, it is preferable that the OPC regions 50a_L0 in the first information layer and the OPC regions 50b_L1 in the second information layer are alternately arranged. That is, it is preferable to be arranged so as to be in a different radius range with respect to the radius of the information storage medium. This is because the OPC area is an area for finding the optimal recording power, which may adversely affect each other when the OPC area 50a_L0 in the first information layer and the OPC area 50b_L1 in the second information layer are disposed to face each other. It is to prevent that.

In an information storage medium having a plurality of information storage layers, reproduction-only data such as control data or disc-related data may be recorded for each groove wobble information storage layer, or may be recorded in only one information storage layer. Then, the reproduction-only data recorded with the groove wobble are copied and recorded in the lead-in areas 50_L0 and 50_L1 and / or the lead-out areas 70_L0 and 70_L1.

Next, a method of recording / reproducing data on an information storage medium according to the present invention comprises the steps of: recording wobble-only data into a groove in one of the lead-in area, the user data area, and the lead-out area as a wobble; Copy-writing the dedicated data into at least one of the lead-in area and the lead-out area.

When the data is recorded or reproduced on the information storage medium, the copy-recorded data is reproduced, and recording / reproduction is performed according to the reproduction data.

In the case of copy-recording the reproduction-only data, it is possible to repeatedly record a plurality of times in order to increase the reliability of the data.

4 is a block diagram of an apparatus for recording and / or reproducing reproduction-only data according to the present invention. The apparatus according to the present invention includes a recording / reading unit 81 and a controlling unit 82. The recording / reading unit 81 records data on the disk 85 which is an information storage medium according to an embodiment of the present invention, and reads the recorded data. The control unit 82 controls the recording / reading unit 81 to copy and record reproduction-only data such as control data or disk-related information recorded with groove wobbles in a predetermined area of the disk 85 according to the present invention, Read-only information copied and recorded on the disc 85 is read, and data is recorded or reproduced on the disc 85 in accordance with the reproduced information.

5 is a block diagram of a disk drive in which the apparatus of FIG. 4 is implemented.

Referring to Fig. 5, the disc drive has a pickup 90 as the recording / reading section 81. The disc 85 is mounted to the pickup 90. The disk drive also includes a PC I / F 94, a digital signal processor (DSP) 92, an RF AMP 93, a servo 96, and a system controller 98 as the control unit 82.

In writing, the PC I / F 94 receives a write command with data to be written from a host (not shown). The system controller 98 performs initialization required for recording. That is, information necessary for initialization such as control data or disk-related data recorded in the lead-in area is read out, and data recording / reproduction is prepared based on this information. The DSP 92 performs ECC encoding by adding additional data such as parity for error correction on the data to be recorded received through the PC I / F 94, and modulates the ECC encoded data in a predetermined manner. The RF AMP 93 converts the data output from the DSP 92 into an RF signal. The pickup 90 records the RF signal output from the RF AMP 93 on the disc 85. The servo 96 receives a command required for servo control from a system controller 98 and servo controls the pickup 90. If the playback speed information is not previously recorded on the disk 85, the system controller 98 displays the playback speed information according to the present invention at the time of starting recording, during recording, or after recording is completed. Command the pickup 90 to write in a predetermined area.

In playback, the PC I / F 94 receives a playback command from a host (not shown). The system controller 98 performs initialization necessary for reproduction. At this time, the system controller 98 reads out the control data or the disk-related data recorded on the disk 85 according to the present invention, and thereby records / reproduces the data. The pickup 90 outputs an optical signal obtained by irradiating a laser beam to the disk 85 and receiving a laser beam reflected from the disk 85. The RF AMP 93 converts the optical signal output from the pickup 90 into an RF signal and provides modulated data obtained from the RF signal to the DSP 92, while providing a servo signal for control obtained from the RF signal. To provide. The DSP 92 demodulates the modulated data and outputs data obtained through ECC error correction. Meanwhile, the servo 96 receives servo signals received from the RF AMP 93 and commands required for servo control received from the system controller 98 to perform servo control on the pickup 90. The PC I / F 94 sends data received from the DSP 92 to the host.

As described above, there is no separate area for recording reproduction-only data such as control data or disc-related data, and the recording capacity for reproduction-only data is recorded by recording data in the form of groove wobble and copying and recording the data. Information can be played back quickly while using less.

As described above, the information storage medium, the method for recording / reproducing data, and the apparatus according to the present invention do not need to have a separate area for reproduction-only data, thereby ensuring a maximum recording area for recording user data. Therefore, it can be usefully applied to a miniaturized information storage medium. In addition, since the reproduction-only data recorded with the groove warp is again copied and recorded and reproduced using the copy-recorded data, the reproduction-only data can be quickly reproduced.

1A and 1B show a data area layout of a conventional information storage medium.

2A illustrates a data area layout of an information storage medium according to the present invention.

2B is a view for explaining information recorded in the form of grooves and wobble formed in the information storage medium according to the present invention.

3 shows a data area layout when the information storage medium according to the present invention has two information storage layers.

4 is a block diagram of an apparatus for recording / reproducing position information on an information storage medium according to the present invention.

5 is a block diagram of a disk drive in which the apparatus of FIG. 4 is implemented.

Claims (14)

In a recordable information storage medium including a lead-in area, a user data area, and a lead-out area, Reproduction-only data is wobbly recorded in a groove in one of the lead-in area, the user data area, and the lead-out area, and the reproduction-only data is copied and recorded in at least one of the lead-in area and the lead-out area. Information storage medium characterized by. The method of claim 1, The lead-in area, the user data area, and the lead-out area are all formed of grooves. The method according to claim 1 or 2, And the lead-in area and the lead-out area consist of only recordable areas. The method according to claim 1 or 2, And the copy recording of the read-only data is performed when the information storage medium is first inserted into a drive. The method according to claim 1 or 2, And the reproduction-only data is repeatedly recorded a plurality of times. The method according to claim 1 or 2, And the read-only data is repeatedly recorded in at least one of the lead-in area and the lead-out area a plurality of times. The method according to claim 1 or 2, And the play only data is disc related data or disc control data. The method according to claim 1 or 2, And the information storage medium has a plurality of information storage layers, and the reproduction-only data is copied and recorded only in any one of the plurality of information storage layers. The method according to claim 1 or 2, And the information storage medium has a plurality of information storage layers, and wherein the read only data is recorded in each of the plurality of information storage layers. A method of recording / reproducing data on a recordable information storage medium including a lead-in area, a user data area, and a lead-out area, Wobble recording reproduction-only data into a groove in one of the lead-in area, the user data area and the lead-out area; Copying the reproduction-only data to at least one of the lead-in area and the lead-out area; Reproducing the copy-recorded data when recording or reproducing the data on the information storage medium. The method of claim 10, And said lead-in area and lead-out area consist only of a recordable area. The method according to claim 10 or 11, wherein Copy recording of the read-only data is performed when the information storage medium is first inserted into a drive. The method according to claim 10 or 11, wherein And recording repeatedly the reproduction-only data a plurality of times. An apparatus for recording / reproducing information on an information storage medium, A recording / reading unit for copying and recording reproduction-only data recorded with groove wobbles on the information storage medium; And And a control unit which controls the recording / reading unit to read data information copied and recorded on the information storage medium and record / reproduce user data according to the information.