KR20040002371A - Information storage medium and method for recording and/or reproducing the same - Google Patents

Abstract

PURPOSE: An information recording medium and a method for recording/playing thereof are provided to suggest various methods to providing information whether an information storing medium is single-layered or multi-layered and information for identifying a layer, thereby carrying out the data recording or playing without any groove wobbles. CONSTITUTION: An information recording medium includes an exclusive playing data zone recorded with basic information on the information recording medium in the shape of pit or high frequency wobble, a rewritable data zone, and a connection zone for connecting the above two zones as a transition zone formed of mirror zone or wobble groove zone. The medium has at least one or more information storing layers, respectively formed of a lead-in area, a user area and a lead-out area. As the medium is loaded to a turn table(S100), an optical pickup unit plays information relating to the medium(S110). The optical pickup unit moves to a predetermined recording/playing layer(S120). After focusing and tracking the layer, corresponding address is played. The address is determined in a predetermined range(S130). If so, the data recording/playing is carried out(S140). In the other case, the optical pickup moves to another layer having different light focusing position(S150).

Description

Information storage medium and method for recording and / or reproducing the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage medium and a recording and / or reproducing method thereof, and more particularly, to an information storage medium in which information about a user data area is recorded outside the user data area, and a recording and / or reproducing method thereof. .

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.

As shown in FIG. 1, the general optical disc as described above has a lead-in area B, a user data area A, and lead-out arranged in an order from the inner circumference R _in to the outer circumference R _{out of the} optical disc. Area (C). The optical disk configured as described above has a structure in which the sector address increases from the inner circumference R _in toward the outer circumference R _out . In the data area A, a plurality of ECC (Error Correction Code) blocks are provided.

Looking at the recordable optical disc, as shown in Fig. 2, the address information of every ECC block is wobbling recorded in the groove. This is because when recording or reproducing data, recording or reproducing can be performed at random regardless of the physical address order of the basic recording units. In particular, when the physical address is wobbling recorded, the information on the user data area can also be wobbling recorded in the groove. On the other hand, in the above-described recordable optical disc, one layer of the optical disc is constituted and does not contain layer information. In addition, there is a problem that it is difficult to maintain the consistency of a format and a reproduction-only optical disc described later.

Referring to the reproduction-only optical disc, as shown in Fig. 3, each ECC block is composed of 16 sectors, ranging from 0 sectors to 15 sectors, and the sector address SA is located at the head of each sector constituting the ECC block. It is recorded. That is, in the optical disc constructed as described above, information on the user data, that is, address information, is recorded in the ECC block in the user data area.

On the other hand, unlike the recordable optical disc described later, this reproduction-only optical disc has no groove in the user area, and therefore, it is required to record information on the user data area in a manner different from that of the recordable optical disc.

In addition, the optical disc as described above is being developed in the direction of increasing the recording capacity. Representative methods for increasing the recording capacity include shortening the wavelength of the recording light source and increasing the numerical aperture of the objective lens. In addition, there is a method of configuring the information storage layer in multiple layers.

DVD-ROMs having multiple information storage layers are described in US Pat. No. 5,881,032 (Optical Disk, Optical Disk, and Optical Disk Reproduction Method and apparatus implementing a mathematical complementary relationship for plural layers).

The sector address structure of the optical disc having this disclosed two-layer information storage layer is shown in Fig. 4A. Referring to FIG. 4A, an optical disc includes a first information storage layer L ₁ and a second information storage layer L ₂ . Each information storage layer is provided with lead-in areas 1a and 2a and lead-outs 1b and 2b. In the first information storage layer (L ₁ ), the sector address (X) increases from the optical disc inner circumference (R _in ) toward the outer circumference (R _out ) direction, and in the second information storage layer (L ₂ ), the optical disc outer circumference (R _out) ), The sector address X 'is increased as it goes to the inner periphery R _in .

On the other hand, a multilayer optical disc having two or more information storage layers is divided into an OTP (Opposite Track Path) type and a PTP (Parallel Track Path) type according to a direction of reproducing information recorded on the disc. As shown in FIG. 4B, the OTP is regenerated from the inner circumference R _in of the first information storage layer L ₁ to the outer circumference R _out , and then the outer circumference of the second information storage layer L ₂ . Playback is performed from (R _out ) to the inner circumference (R _in ). In other words, the track spiral direction refers to a type in which the information storage layers L ₁ and L ₂ are alternately formed in opposite directions.

4C illustrates a multilayer information storage medium having first to fourth information storage layers L ₁ , L ₂ , L ₃ , and L ₄ in the case of OTP. In the first to fourth information storage layers L ₁ , L ₂ , L ₃ , and L ₄ , first to fourth lead-in areas 1a are alternately disposed between an inner circumferential region and an outer circumferential region of the optical disc. (2a) (3a) 4a and first to fourth lead-out areas 1b, 2b and 3b and 4b. In the play direction of this four-layer optical disc, the first information storage layer, the inner periphery (R _in) outer periphery (R _out) to, then a second data storage layer (L ₂₎ unexpected state (R _out) at the (L ₁₎ the inner circumference on the inner circumference (R _in), the third information periphery (R _out) of the inner (R _in) outer periphery (R _out), the fourth data storage layer (L ₄₎ in the storage layer (L3) (R _in) Is played.

FIG. 5 shows a two-layered optical disc of the PTP type, _in which information is reproduced from the inner circumference R _in to the outer circumference R _{out of} the first information storage layer L ₁ , followed by the second information storage layer L _2. Information is played back from the inner circumference of) to the outer circumference (R _out ). In other words, the track spiral direction is the same for each information storage layer. Here, the first lead-in area 1a is provided at the inner circumferential side of the first information storage layer L1, and the first lead-out area 1b is provided at the outer circumferential side of the first information storage layer L1. The second lead-in area 2a is provided on the inner circumference and the second lead-out area 2b is provided on the outer circumference.

The lead-in areas 1a (2a) 3a (4a) and lead-out areas (1b) (2b) (3b) and (4b) record information about an optical disc. Several conditions relating to are recorded together. Therefore, the user data can be normally recorded or reproduced only by reproducing the information recorded in these lead-in areas and lead-out areas. In particular, in the case of an information storage medium having a plurality of information storage layers, information on the number of information storage layers is recorded, and information on the number of such layers is recorded for each information storage layer. Therefore, it is possible to know how many layers the information storage layer is composed of by reading the information of which layers.

On the other hand, in the case of a recordable information storage medium, information on the information storage layer required for data recording should be recorded in the user data area. This is because, when recording or reproducing data, recording or reproducing can be performed at random regardless of the physical address order of the basic recording units. In particular, when the physical address is wobbling recorded, information on the information storage layer may also be wobbling recorded in the groove. At this time, the information on the information storage layer may be read by a push-pull channel signal when data is recorded or reproduced.

By the way, since the groove wobble is not formed in the user data area, the information dedicated to the reproduction is required to record the information on the information storage layer by a new method different from the recordable information storage medium as described above.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables the user data area to be read out using the physical address of the user data area or before or after the basic recording unit of the user data. It is an object of the present invention to provide an information storage medium and a recording and / or reproducing method capable of recording information about and providing information about the information.

1 shows a typical single-layer optical disc.

Fig. 2 is a diagram showing the address structure of one ECC block of the recordable optical disc.

Fig. 3 is a diagram showing the address structure of one ECC block of the read only optical disc.

Fig. 4A is a diagram showing a sector address structure of a conventional DVD-ROM two-layer optical disc.

Fig. 4B is a diagram showing the arrangement structure of lead-in and lead-out areas in the case of the Opposite Track Path (OTP) in the conventional DVD-ROM two-layer optical disc.

Fig. 4C is a diagram showing the arrangement structure of lead-in and lead-out areas in the case of the Opposite Track Path (OTP) in the conventional DVD-ROM 4-layer optical disc.

Fig. 5 is a diagram showing the arrangement structure of lead-in and lead-out areas in the case of PTP (Parallel Track Path) in a conventional DVD-ROM two-layer optical disc.

Fig. 6 is a related art of the present invention and shows a data structure of a lead-in area or lead-out area of a recordable information storage medium.

7 is a related art of the present invention, schematically showing the overall structure of a read-only information storage medium.

8 is a flowchart illustrating a method of recording and / or reproducing an information storage medium according to an embodiment of the present invention.

9 is a flowchart showing a method of recording and / or reproducing an information storage medium according to another embodiment of the present invention.

FIG. 10 is a view showing information on a user data area is recorded for a basic unit of one user data area of an information storage medium according to an embodiment of the present invention; FIG.

11A is a diagram showing one recording unit of an information storage medium according to the present invention;

11B is a diagram showing a case where recording units are configured continuously.

<Explanation of symbols for the main parts of the drawings>

A, 43 ... User data area B, 40 ... Lead-in area

C, 45 ... lead-out area 47 ... groove track

48 Land Track 49 Groove Wobble

50 ... ft

In order to achieve the above object, the information storage medium according to the present invention is characterized in that the information on the user data area is recorded in at least one of the area in front of and the area in front of the user data area in which user data is recorded. do.

Preferably, the basic unit of the user data area is any one of a physical cluster, an ECC block, a sector, and a frame. In addition, the information about the user data area is preferably recorded in at least one of run-in and run-out provided in front of and behind the physical cluster.

In addition, the information storage medium includes two or more information storage layers, and in this case, patterns recorded in at least one of an area in front of the user data area and an area behind it are differently formed for each of the information storage layers. It is desirable to be.

In order to achieve the above object, a recording and / or reproducing method of an information storage medium according to the present invention is provided in a user data area recorded in at least one of a front area and a rear area of a user data area in which user data is recorded. Reproducing information about; And recognizing information on a user data area by using the reproduced information.

Hereinafter, an information storage medium and a reproduction and / or recording method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the information storage medium according to the present invention can be applied not only to a recordable information storage medium but also to a read-only information storage medium.

The recordable information storage medium includes a single storage layer or two or more information storage layers, and each information storage layer includes a lead-in area, a user data area, and a lead-out area.

Referring to FIG. 6, at least one of the lead-in area and the lead-out area includes a read-only data zone 10, a rewritable data zone 30, and the read-only data zone 10. And a connection zone 20 for connecting between the rewritable zone 20.

In the reproduction-only data zone 10, basic information about the information storage medium is recorded in the form of a pit or a high frequency groove wobble. The reproduction-only data zone 10 is provided with an information storage medium related information zone 10a in which the size, version number, recording conditions, and the like of the information storage medium are recorded.

The connection zone 20 may be provided with a transition zone for connecting between the read-only data zone 10 and the rewritable data zone 30. This connection zone 20 may be configured as a mirror zone or a wobble groove zone.

The rewritable data zone 30 may include an information storage medium test zone 30a, a drive test zone 30b, an information storage medium control data zone 30c, a defect management zone 30d, and the like. In addition, the information storage medium control data zone 30c includes at least one information storage medium control area in which information storage medium control related information is recorded. Here, for example, the first to fourth information storage medium control areas 30c-1, 30c-2, 30c-3 and 30c-4 are illustrated. In addition, at least one reserved area 30c-5 and 30c-6 may be further provided as a free area that is not intended but can be recorded thereafter. The user data area may be formed, for example, with a groove wobble.

On the other hand, the read-only information storage medium includes at least one layer of information storage layer and each information storage layer has a lead-in area 40, a user data area 43 and a lead-out area as shown in FIG. 45). Herein, reproduction-only data such as information storage medium related information is recorded in the lead-in area 40 and / or lead-out area 45, and reproduction-only user data is recorded in the user data area 43. do.

In the lead-in area 40 and the lead-out area 45, groove tracks 47 and land tracks 48 are alternately formed. The reproduction-only data such as the information storage medium related information is recorded as a high frequency groove wobble 49 in the form of waves on both side walls of the groove track 47 or the land track 48. The portion recorded by the high frequency groove wobble 49 is called a high frequency data zone.

In addition, the user data is recorded in the form of pits 50 in manufacturing the substrate of the information storage medium. Such an information storage medium is a kind of hybrid disc, and the reproduction channels are configured differently. In particular, the read-in data of the lead-in area of the recordable information storage medium is reproduced by using the push-pull channel, and the user data is reproduced by using the thumb channel. The region can be played with a push-pull channel, and the user data region can be played with a thumb channel. In this respect, it is possible to ensure consistency between the recordable information storage medium and the read-only information storage medium.

In the recordable information storage medium or the reproduction-only information storage medium having the above structure, information on the user data area, for example, whether or not the information storage layer is a single layer, and in the case of the multi-layer, information is reproduced for the information storage layer. Here's how to find out whether the information is:

Generally, a physical address is recorded in the user data area for each basic recording unit in which data is recorded.

An example of an information storage medium having two information storage layers will be described. In this case, physical addresses may be recorded up to 0-30000 times in the first information storage layer and up to 30001-60000 in the second information storage layer. Here, the number of layers of the information storage layer can be detected by this physical address. That is, each time the pickup approaches the optical disk for recording / reproducing of data, the physical address of each basic recording unit is reproduced. If it is in the range of 60000, it can be determined to recognize the second information storage layer.

8 shows a procedure of searching for a first information storage layer L ₁ in an information storage medium having one or more information storage layers.

First, an information storage medium is loaded onto a turntable of an optical recording / reproducing drive (S100), and information related to the information storage medium is reproduced by the optical pickup apparatus (S110). Subsequently, the apparatus moves to a predetermined recording / reproducing layer to record or reproduce data on the optical disc (S120). After accessing the moved predetermined layer to focus and track, the address of the corresponding area is reproduced. Then, it is determined whether this address is within a predetermined range (S130). For example, as described above, it is determined whether the address is in the range of 0 to 30000, and if it is within the range, it is recognized as the first information storage layer L ₁ and data recording or reproduction is performed (S140). However, when the address is not in the range of 0-30000, the light spot position formed by the optical pickup is moved to another layer (S150), and the above process, that is, determining whether the address is within a predetermined range is repeated. (S150). That is, it is determined whether the address is within a predetermined range, and if so, recording or reproduction is performed, otherwise it is moved to another layer. By repeating this process, the first information storage layer L ₁ can be found.

9 is a first and a second data storage layer (L ₁₎ a first data storage layer (L ₁₎ and a second information storage layer, the process of finding the (L ₂₎ in a data storage medium having the (L ₂₎ Indicated.

First, an information storage medium is loaded onto a turntable of an optical recording / reproducing drive (S100), and information related to the information storage medium is reproduced by the optical pickup apparatus (S110). Subsequently, the apparatus moves to a predetermined recording / reproducing layer to record or reproduce data on the optical disc (S120). After accessing the moved predetermined layer to focus and track, the address of the corresponding area is reproduced. Then, it is determined whether this address is within a predetermined range (S130). In this case, it is determined whether the address is in the range of 0 to 30000, and if it is within the range, it is recognized as the first information storage layer L ₁ and data recording or reproduction is performed (S140). When the address is not within the above range, the light spot is moved to another layer (S150).

Subsequently, it is determined whether the address is within a predetermined range, for example, in the range of 30001-60000 (S210), and if it is within this range, it is recognized as the second information storage layer L ₂ , and data recording or reproduction for this information storage layer is performed. (S220).

Here, although the case where the first and second information storage layers are provided has been described, information on the information storage layer can be provided in the same manner even when the information storage layer is configured to be larger than that.

Next, as a second embodiment, there is a method of recording information about a user data area, for example, floor information, in at least one of an area in front of and an area in front of a basic unit in which data is recorded. The basic unit in which data is recorded may be a physical cluster, an ECC block, a sector, a frame, or the like, and its capacity does not need to be limited.

FIG. 10 shows that information on the user data area is recorded as address information outside of every ECC block composed of a plurality of sectors, that is, inside and / or outside of the ECC block. Here, the information on the user data recorded on the inside and / or outside is the ECC block address. This ECC block address preferably includes layer information indicating how many layers the information storage medium has. That is, layer information is recorded using the address.

FIG. 11A illustrates a case in which data is recorded in a physical cluster. Referring to this figure, run-in and run-out are provided to record additional data before and after the physical cluster. 11B illustrates a case where the physical clusters are configured continuously. Here, information about the user data area, for example, floor information, may be recorded in at least one of the run-in and run-out. In particular, it is preferable to apply such a method to a read-only information storage medium in that format consistency with a recordable information storage medium can be secured.

The information storage medium according to the third embodiment relates to an information storage medium including at least two information storage layers, wherein each information storage layer has a different pattern for each layer in at least one of the above-described run-in and run-out. Floor information may be indicated.

For example, in an information storage medium having two information storage layers, the first information storage layer L ₁ has a pattern of marks or pits and a space interval of 5T / 5T / 5T / 5T, and the second information storage layer. The layer L ₂ may be composed of a pattern of 8T / 8T / 8T / 8T. As described above, by constructing successive patterns of the same size, the number of layers of the information storage layer can be recognized.

Alternatively, in the first information storage layer L ₁ , a mark or pit and a space interval are formed in a pattern of 2T / 9T / 2T / 9T, and in the second information storage layer L ₂ , 9T / 2T / 9T / 2T It may consist of a pattern. As such, patterns having different sizes may be randomly configured to recognize the number of layers of the information storage layer.

According to the above method, the basic unit of the user data area is different from layer to layer, for example, at least one of an area provided before and after any one of a physical cluster, an ECC block, a sector, and a frame, for example, a run-in and a run-out. By forming a distinctive pattern, the number of layers of the information storage layer can be easily known.

As described above, the information storage medium and the method of recording and / or reproducing the same according to the present invention provide information on the user data area, such as information on whether the information storage medium is a single layer or a multilayer, and how many layers the layer corresponds to. By presenting a variety of methods for providing information, even in the absence of groove wobble, the information on the user data area can be effectively recorded and / or reproduced. This can be very effectively applied to a reproduction-only information storage medium without groove wobble, thereby enabling reliable reproduction of data. In addition, a variety of methods are provided for recording recordable information storage media by a new method other than the method of recording the information on the user data area in the groove wobble.

Claims (14)

And information on the user data area is recorded in at least one of a front area and a rear area of the user data area in which user data is recorded. The method of claim 1, And a basic unit of the user data area is one of a physical cluster, an ECC block, a sector, and a frame. The information storage medium of claim 2, wherein the information about the user data area is recorded in at least one of a run-in and a run-out provided in front of and behind the physical cluster. The method according to any one of claims 1 to 3, It has two or more information storage layers, And a pattern recorded in at least one of an area before and after the user data area is formed differently for each of the information storage layers. The method according to any one of claims 1 to 3, Information storage medium characterized in that the information on the user data area uses an address. The method according to any one of claims 1 to 3, Information storage medium characterized in that the information about the user data area is layer information The method of claim 6, And the layer information uses an address. Reproducing information about the user data area recorded in at least one of the area before and after the user data area in which the user data is recorded; And recognizing information on a user data area by using the reproduced information. The method of claim 8, And the basic unit of the user data area is one of a physical cluster, an ECC block, a sector, and a frame. The method of claim 9, And the information about the user data area is recorded in at least one of a run-in and a run-out provided in front of and behind the physical cluster. The method according to any one of claims 8 to 10, It has two or more information storage layers, And a pattern recorded in at least one of an area before and after the user data area is formed differently for each of the information storage layers. The method according to any one of claims 8 to 10, A method for recording and / or reproducing an information storage medium, wherein information on the user data area uses an address. The method according to any one of claims 8 to 10, The information about the user data area is Method for recording and / or reproducing information storage medium, characterized in that it is layer information The method of claim 13, And the layer information uses an address.