KR101111513B1 - Method and Apparatus for recording data on the recording medium - Google Patents

Abstract

An object of the present invention is to provide a method for performing an OPC process for calculating an optimal recording power of a recording medium such as a Blu-ray Disc (BD) and a recording medium recording method and a recording apparatus using the calculated optimal recording power.

The present invention provides a recording medium having an inner area, a data area, and an outer area, the method comprising: determining whether a recording medium is formatted when the recording medium is loaded into an optical recording / reproducing apparatus. And performing an OPC process of calculating an optimal recording power in a test area in the case of a formatted recording medium, and determining whether to format a format in the case of a non-formatted recording medium. And performing an OPC process of calculating an optimal recording power in a test area while formatting the format command, and recording / reproducing with the calculated optimal recording power. Provided is a recording method of a recording medium.

Optical Disc, OPC, DCZ, Format, Optimal Recording Power

Description

Recording method and recording device for recording medium {Method and Apparatus for recording data on the recording medium}

1 is a view showing an example of a structure of an optical disk to which the present invention is applicable.

2 is a view showing an example of the structure of a recordable single layer optical disc to which the present invention is applicable.

3A to 3B show an example of the structure of a recordable dual layer optical disc to which the present invention is applicable.

4A-4B illustrate another structure of a recordable dual layer optical disc to which the present invention is applicable.

5 to 8 are views for explaining a modulation method (modulation method) applied to the present invention

9 is a view for explaining an embodiment of performing the OPC process according to the present invention.

10 is a view for explaining an embodiment of searching an OPC start position according to the present invention.

11 is a view for explaining a recording / reproducing apparatus of a recording medium according to the present invention.

12 is a flowchart illustrating an embodiment of a recording method of a recording medium according to the present invention.

13 is a flowchart for explaining another embodiment of a method of recording a recording medium according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

20: recording and playback section 11: pickup section

12 control unit 13 signal processing unit

15: memory 16: microcomputer

The present invention relates to a recording method and a recording apparatus for a recording medium, and more particularly to a method for performing a 0PC process for calculating the optimum recording power in recording on a recording medium.

As a recording medium, an optical disk capable of recording a large amount of data is widely used. Recently, new high-density recording media, such as a Blu-ray Disc (BD), which can record and store high-quality video data and high-quality audio data for a long time, have been developed.

Blu-ray Disc (BD), a next-generation recording medium technology, is a next-generation optical recording solution that can record data that significantly exceeds the existing DVD. Recently, other digital devices have been established as a world standard technical specification.

However, since a preferable data recording method of the Blu-ray Disc (BD) has not been proposed, there are many limitations in developing an optical Blu-ray Disc (BD) -based optical recording and reproducing apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to propose a method for recording a new recording medium and a method for performing a 0PC process for calculating an optimum recording power in a recording medium such as a Blu-ray disc (BD). The purpose is to provide a device.

In order to achieve the above object, the present invention provides a recording medium having an inner area, a data area, and an outer area, wherein the recording medium is loaded in an optical recording / reproducing apparatus. Determining whether or not a format is determined, performing an OPC process of calculating an optimal recording power in a test area when the recording medium is a formatted recording medium, and determining that the recording medium is not formatted. Determining whether or not a format command, if the format command is present, performing the OPC process of calculating the optimal recording power in the test area while formatting, and recording / playback with the calculated optimal recording power It provides a recording medium recording method comprising a.

According to another embodiment of the present invention, in the OPC process for calculating an optimal recording power of a recording medium having a test area, determining whether the recording medium is formatted or not, As a result, if the recording medium is formatted, OPC process is performed in the test area, and if the recording medium is not formatted, after receiving a format command, the recording medium is simultaneously formatted with the format. A method of performing an OPC process for a recording medium, comprising the step of performing an OPC process in a test area.

According to another embodiment of the present invention, the present invention provides a method for recording data on a recording medium, comprising the steps of not performing an OPC process even when the recording medium is loaded into an optical recording / reproducing apparatus, and determining whether there is a recording command. And, if there is the recording command, calculating an optimal recording power by performing an OPC process, and recording data on the recording medium using the calculated optimal recording power. .

Further, in recording data on the recording medium, performing a test for calculating an optimum recording power in the OPC area in the inner area of the recording medium and the DCZ area in the outer area, respectively, and recording the data. And determining the recording power based on the recording position in the recording medium data area and the optimum recording power calculated in the OPC area and the DCZ area, respectively. To provide.

In the present invention, in recording data on a recording medium, a control unit for transmitting a recording command, determining whether the recording medium is formatted, performing the format, and calculating an optimum recording power And a recording and reproducing unit configured to perform an OPC process for performing the operation, and to record in the recording medium according to the recording command of the controller by applying the calculated optimal recording power.

In this regard, the recording medium of the present invention preferably comprises at least one recording layer, and each recording layer preferably has at least one test area.

Therefore, according to the present invention, not only can this be utilized in manufacturing Blu-ray Disc (BD) under development recently, but also it is possible to efficiently test and record and record a recording medium.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a recording method, a recording device, etc. of the recording medium according to the present invention will be described in detail.

In addition, the terminology used in the present invention was selected as a general term that is widely used at present, but in certain cases, the term is arbitrarily selected by the applicant, and in this case, since the meaning is described in detail in the corresponding part of the present invention, a simple term It is to be understood that the present invention is to be understood as a meaning of terms rather than names.

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 using an optical disc, in particular, a "Blu-ray Disc (BD)" as a recording medium for convenience of explanation, but the technical concept of the present invention is equally applicable to other recording media. It will be self explanatory.

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. Refers to the process of calculating the optimal recording power during recording.

That is, when an optical disc is loaded into a specific optical recording and reproducing apparatus, the optical recording and reproducing apparatus repeatedly performs a process of recording and reproducing after recording with a specific recording power in the OPC area in the optical disk, thereby making it possible to apply the optimum to the optical disk. The recording power is calculated, and the optimal recording power determined through the above process is used for the subsequent recording of the optical disk. Therefore, an OPC area is required for a recordable optical disc.

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 the recording medium, and includes an optical recording / reproducing apparatus including an OPC process. Means an area where various tests can be performed.

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

FIG. 1 is a view showing an example of a structure of a recordable optical disc to which the present invention is applicable, and shows a recordable single layer Blu-ray disc (BD-R / RE) for convenience of description.

Referring to FIG. 1, an optical disc is divided into an inner area, a data area, and an outer area sequentially from the inner circumference of the disc, and an inner area and an outer area The disk management information is recorded in the parentheses or used as a test area, and the actual user data is recorded in the data area.

The structure of the inner area and the outer area will be described in more detail. In the inner area, PIC (Permanent) in which disc management information is recorded as an embossed high frequency modulated (HFM) signal. An information and control data area and an OPC area for performing an OPC process as a test area, and two information areas IN1 and IN2 for recording various disk management information including a defect management area (DMA) are provided. It is.

In the case of a write once Blu-ray Disc (BD-R), a TDMA (Temporary Disc Management Area) is further provided adjacent to the OPC area, and in the case of a rewritable Blu-ray Disc (BD-RE), It is left as a reserved area adjacent to the OPC area as a spare area for future use. In addition, two other info areas IN3 and IN4 are provided in the outer area.

In addition, a plurality of protection zones Pr1, Pr2, and Pr3: protection zones are provided in the inner area and the outer area to protect the disk, and in particular, the inner area. The protection area provided on the innermost inner disk of the disk is called "Pr1 (Protection zone 1)", and the protection area provided on the outermost disk of the disk in the outer area is called "Pr3 (Protection zone 3)". A protection region provided between the PIC (Permanent Information & Control data) region and the Info region 2 (IN2) in the inner area is called "Pr2 (Protection Zone 2)". In particular, the " Pr2 (Protect zone 2) " region is a kind of buffer zone for chageover utilized as a change section between an embossed PIC region and a recordable region.

The recordable Blu-ray disc (BD-R / RE) of the present invention is made by recording data in a groove in a recording layer composed of lands / grooves in the disc. The grooves are divided into HFM-modulated grooves and wobbled grooves.

In addition, the wobbled groove (wobbled groove) according to the modulation method, a modulation method that uses a combination of Minimum Shift Keying (MSK) modulation and HMW (Harmonic Modulated Wave) modulation (this is referred to as 'MSK + HMW modulation'), It is classified into a modulation method that applies only MSK (Minimum Shift Keying) modulation.

In particular, the wobbled groove is a wobble shape formed by modulation using a sinusoid curve in a groove in a recording layer, and the wobbled shape enables an optical recording / reproducing apparatus to be applicable. It is possible to read the address information of the groove (this is called 'ADIP: Address In Pre-groove') and the disk general information. This will be described later in detail with reference to FIGS. 5 to 8.

In this regard, each region in the disk of the present invention applies the modulation scheme differently according to characteristics. First, the "Pr1 region" and the "PIC region" in the inner region are HFM-modulated grooves (HFM grooves). ), And the "Pr3 area" in the outer area consists of a wobbled groove to which only MSK (Minimum Shift Keying) modulation is applied, and the inner area, the outer area, and the data area except the above areas are All are composed of wobbled grooves with 'MSK + HMW modulation' applied.

FIG. 2 is a view showing, for example, the structure of a recordable single layer optical disk to which the present invention is applicable, in which an additional " Drive Calibration zone (DCZ) area " It is characterized by having further provided. Hereinafter, the description will be made based on the DCZ region, and the rest of the configuration is the same as that of FIG. 1 and will be omitted.

As described above, the "DCZ (Drive Calibration zone) zone" is a kind of test zone in which the optical recording / reproducing apparatus performs a disc test for various purposes, and generally, another test zone As in the OPC region, it is possible to perform an OPC process on the DCZ region. However, it is obvious that another test may be performed in addition to the OPC process in the DCZ region, and the present invention is not limited thereto.

In this connection, as compared with FIG. 1, the DCZ region of FIG. 2 is physically provided in the outer region. Therefore, the "Pr3 region" of FIG. 2 is provided with an area smaller than the DCZ region additionally allocated as compared to the "Pr3 region" of FIG. It is desirable to allocate in a small size, for example in 512 clusters.

In addition, the additionally allocated DCZ region may be a 'MSK + HMW modulation' scheme using a mixture of minimum shift keying (MSK) and harmonic modulated wave (HMW) modulation, similarly to the OPC region and data region of the inner region. Apply. In other words, the newly allocated DCZ area is an area for recording and reproducing the test data, and it is necessary to secure the same reliable address information ADIP as the general data area for accurate recording of the test data.

3A to 3B show an example of a structure of a recordable dual layer optical disc to which the present invention is applicable, and FIG. 3A is a rewritable dual layer Blu-ray disc (BD-RE). 3B shows a writeable dual layer Blu-ray Disc (BD-R), respectively. In this connection, the first recording layer of the two recording layers is referred to as "Layer0 (L0)" and the second recording layer is referred to as "Layer1 (L1)".

According to Fig. 3A, in the rewritable dual layer Blu-ray Disc (BD-RE) of the present invention, each recording layer has the same structure, and the outer regions of the respective recording layers L0 and L1 are outer. Each of the DCZ areas DCZ0 and DCZ1 is included in the area, and the DCZ areas DCZ0 and DCZ1 are used in the same manner as the data area by using both a minimum shift keying (MSK) modulation and a harmonic modulated wave (HMW) modulation. MSK + HMW modulation is applied.

According to Fig. 3B, even in the write once dual layer Blu-ray Disc (BD-R) of the present invention, each DCZ area is included in the outer area of each recording layer L0, L1. In the DCZ regions DCZ0 and DCZ1, the MSK + HMW modulation scheme is used in which a minimum shift keying (MSK) modulation and a harmonic modulated wave (HMW) modulation are used in the same manner as the data region.

However, compared to the rewritable disc BD-RE as shown in FIG. 3A, the write once disc BD-R as shown in FIG. 3B requires more management information recording area due to the characteristic of 'one time recording'. As a result, a TDMA region was added in the inner region, and the OPC region OPC1 was provided instead of the PIC region embossed by HFM modulation in the inner region of the second recording layer L1.

In this regard, the DCZ area of the present invention is more usefully utilized in the write once disc of FIG. 3B, which is described above as 'write once' in the write once disc (BD-R). Due to the need for more management information recording area, the DCZ area can be used as a new test area that can replace the OPC area of the inner area, and can be recorded once more due to the lack of the OPC area. The disadvantage of not writing to the disk can be solved.

4A to 4B show another structure of a recordable dual layer optical disk to which the present invention is applicable, for example, and specifically for the method of allocating the DCZ area in each recording layer. It is. 4A and 4B all illustrate a write once disc ex (BD-R) as an example, but the technical idea of the present invention is as described above. The same applies to RE).

According to FIG. 4A, in the DCZ areas DCZ0 and DCZ1 are allocated in the outer area of each recording layer, the DCZ areas DCZ0 and DCZ1 are not provided at physically the same position with respect to the traveling direction of the light beam.

That is, assuming that the DCZ area is used for the OPC process, similarly to the OPC area of the inner area, to perform the OPC process, a high power value for a test or a low power value or a low power value for a high power value is performed. Up to step by step, or use a power value within a certain range around the reference power (reference power).

This means that if the DCZ areas DCZ0 and DCZ1 are physically located in the same position relative to the advancing direction of the light beam between adjacent recording layers, the DCZs provided in the adjacent recording layer other than the DCZ areas ex and DCZ0 that are actually used. The probability of causing interference of the light beams up to the region ex, DCZ1 is increased, which adversely affects the calculation of the optimum recording power through the OPC process. For the same reason, the OPC areas OPC0 and OPC1 in the inner area are not provided at the same physical location with respect to the traveling direction of the light beam.

Therefore, in the outer area of the second recording layer, a "buffer area" is added at the same position as the DCZ area DCZ0 of the first recording layer with respect to the advancing direction of the light beam, and then the outer The DCZ area DCZ1 is allocated in the (outer) direction. Of course, the outer area allocation method of the first recording layer L0 and the second recording layer L1 may be changed. For example, in the outer area of the first recording layer, a "buffer area" is added at the same position as the DCZ area DCZ1 of the second recording layer with respect to the advancing direction of the light beam, Thereafter, the DCZ region DCZ0 may be allocated in the outer direction.

In this regard, the 'MSK + HMW modulation' scheme in which both the DCZ regions DCZ0 and DCZ1 are used in the same manner as the data region using a minimum shift keying (MSK) modulation and a harmonic modulated wave (HMW) modulation.

According to Fig. 4B, the DCZ area is allocated not only in the outer area of each recording layer but also in the adjacent data area. That is, the recording layer is divided into two types, and in the first type recording layer (for example, 'L1'), the DCZ area DCZ1 is provided in the outer area, and the second type recording layer is provided. (E.g., 'L0') includes the DCZ area DCZ0 in a data area adjacent to an outer area, and alternately provided with the first type recording layer and the second type recording layer. It features.

5 to 8 are diagrams for explaining a modulation method (modulation method) applied to the present invention.

FIG. 5 illustrates a minimum shift keying (MSK) modulation scheme. In particular, the "Pr3 (protect zone 3)" area in the outer area is a region consisting of MSK modulation only.

The MSK modulation scheme is generated by performing a cosine transform with a wobble frequency (fwob), as shown in FIG. 5, and a general wobble is called a "monotone wobble (MW)" and a wobble frequency. The three wobbles created through the (fwob) and cosine sign changes are called "MSK Mark wobbled (MM)".

FIG. 6 illustrates a Harmonic Modulated Wave (HMW) modulation scheme. In particular, the OPC region in the inner region, the DCZ region in the outer region, and the data region are shown in FIG. 5. MSK modulation is a region consisting of a mixed "MSK + HMW" modulation.

In this regard, the HMW modulation scheme performs a cosine transform with a wobble frequency (fwob) and a sine transform with a 2 * wobble frequency (2 * fwob), as shown in FIG. 6. Is generated by performing (), and the sign of the sine transform has a value of "1", and the sign of the sine transform is (-). Has a value of "0". The wobble configured in the above manner is particularly referred to as "sawtooth wobble (STW)". In particular, "sawtooth wobble (STW)" having a value of "1" is called STW ("1"), and "sawtooth wobble (STW)" having a value of "0" is called STW ("0").

FIG. 7 is a view for explaining a method for identifying an ADIP unit by the "MSK + HMW" modulation scheme. One ADIP unit is configured with 56 wobbles.

As shown in FIG. 7, the first three wobbles of all ADIP units are composed of "MSK mark (MM)" wobbles, and then ADIP units are classified as follows according to the type of wobble. Lose.

That is, an ADIP unit composed of '1 MM + 53 MW' is called a 'monotone unit', and an ADIP unit composed of '1 MM + 15 MW + 37 STW ("0") + 1 MW' This is called the "reference unit".

In addition, an ADIP unit consisting of '1 MM + 13 MW + 1 MM + 7 MW + 1 MM + 27 MW' is referred to as a "sync_0 unit" and '1 MM + 15 MW + 1 MM + 7 MW + 1 An ADIP unit consisting of MM + 25 MW 'is called a "sync_1 unit" and an ADIP unit consisting of' 1 MM + 17 MW + 1 MM + 7 MW + 1 MM + 23 MW 'is called a "sync_2 unit" ", And the ADIP unit consisting of '1 MM + 19 MW + 1 MM + 7 MW + 1 MM + 21 MW' is called" sync_3 unit ".

In addition, an ADIP unit consisting of '1 MM + 9 MW + 1 MM + 3 MW + 37 STW ("0") + 1 MW "is called" data_1 unit "and" 1 MM + 11 MW + 1 MM " An ADIP unit consisting of + 1 MW + 37 STW ("1") + 1 MW 'is called "data_0 unit". In other words, if it is found as "data_1 unit", it is interpreted as "1" value, and if it is found as "data_0 unit", it is interpreted as "0" value.

FIG. 8 is a diagram illustrating a method in which 83 ADIP units configured as shown in FIG. 7 are gathered to form one ADIP word.

As shown in FIG. 8, the first nine ADIP units of an ADIP word are sequentially "monotone unit", "sync_0 unit", "monotone unit", "sync_1 unit", and "monotone unit" , "sync_2 unit", "monotone unit", "sync_3 unit", and "reference unit".

Thereafter, from the 10th ADIP unit (ADIP unit number = 9) to the 83rd ADIP unit (ADIP unit number = 82), any one of "data_0 unit" or "data_1 unit" described above in FIG. It is composed of four bits to form a total of 15 units, which is called "ADIP codeword nibble number (c0 ~ c14)".

In the "ADIP codeword nibble number (c0 to c14)" value, the physical address of the wobble (hereinafter referred to as "PAA: Physical ADIP Adress") and auxiliary data (AUX data) are recorded. By reading the ADIP word of, you can check the 'PAA' position of the current disk.

5 to 8 described above apply equally to all regions to which the " MSK + HMW " modulation scheme of the present invention is applied. Therefore, the above scheme is also applied to the DCZ region provided in the outer region.

Here, the reason why the "MSK + HMW" modulation scheme is applied to the DCZ region is that the DCZ region is a region for recording actual test data. If only the MSK modulation scheme is applied like the Pr3 (protection zone 3) region, the HMW is applied. Since the "sawtooth wooble (STW)" by the modulation is not applied, it is impossible to distinguish between the "monotone unit" and the "reference unit" among the above-described ADIP units, and also "data_1 unit" and "data_0 unit" There is also room for error in the distinction of.

Therefore, in order to prevent the error, the DCZ region is preferably applied to the "MSK + HMW" modulation scheme, unlike the protection zone 3 (Pr3) region to which only the MSK modulation scheme is applied.

The present invention can also be applied to a recording medium in which there are more than one layer as a recording layer.

9 is a view for explaining an embodiment of performing the OPC process according to the present invention.

First, in the recording medium, the direction in which the optical recording / reproducing apparatus tracks the recording medium is a direction in which the PSN increases from a portion having a small PSN (Physical Sector Number) to a portion having a large PSN. The execution direction is a direction in which the PSN decreases from the larger PSN to the smaller PSN.

In addition, the recording direction after the OPC process is a direction in which the PSN increases from a portion having a small PSN to a portion having a large PSN as in the tracking direction.

In this regard, the unit of recording data in the data area of the recording medium is one cluster unit, whereas the unit of recording data by performing the OPC process in the OPC area may be exactly one cluster unit, but the data is recorded by performing OPC. The area may be an area of less than one cluster, or an area of more than one cluster.

In other words, the unit of data recorded for performing the OPC process is an AUN (Address Unit Number) unit. The AUN is an unused OPC area that is an area before recording data as address information included in recording data. Obviously, the AUN information is not recorded.

Here, the AUN is a unit having a smaller area range than the cluster, and one cluster includes 16 AUNs. That is, the length of one OPC process is selected by the optical recording / reproducing apparatus, but is not limited to the integer of physical clusters.

Referring to FIG. 9, FIG. 9 illustrates a case where three OPC processes are performed, and shows OPC Markers that distinguish them from portions in which an OPC process is performed in the OPC region.

The first part of the OPC process is the cluster # P + 1 part, where the OPC #M is the part where data is recorded, and the OPC Marker #M is displayed to distinguish it. In addition, the part which performed the second OPC process is a part including cluster #P, cluster #N, and part of cluster # N-1, and OPC # M + 1 is a part where data is recorded and OPC to distinguish it. Marker # M + 1 is displayed.

In addition, the third OPC process is performed as a part of cluster # N-1, where OPC # M + 2 is a portion where data is recorded, and OPC Marker # M + 2 is displayed to distinguish the data. At this time, a portion of cluster # N-2 and cluster # N-1 after OPC Marker # M + 2 is an unused cluster area that has not been used yet.

In this regard, in OPC Markers that distinguish the area where the data on which the OPC process has been performed is recorded, the distance between two consecutive OPC Markers does not exceed 16 clusters. For example, in an OPC process requiring more than 16 clusters, an OPC marker must be inserted to satisfy the above requirement. Here, the OPC marker should have a length of at least 868 NWLs (Nominal Wobble Length).

In addition, in FIG. 9, OPC #M occupies one cluster in the OPC region, OPC # M + 1 occupies more than one cluster in the OPC region, and OPC # M + 2 is OPC. As shown above, the OPC process is performed in AUN units rather than in one cluster unit as indicated above.

10 is a view for explaining an embodiment of searching an OPC start position according to the present invention.

Referring to FIG. 10, one cluster, which is a part of the OPC region, is shown as 1 cluster 13944 wobbles, 249 ADIP units, which is 498 sync frames, and 3 ADIP words. In this regard, one ADIP word is 83 ADIP units, which is 56 wobbles. In addition, one cluster consists of 16 AUNs. At this time, the wobble means NWL (Nominal Wobble Length).

For example, the OPC areas (AUN6 to AUN15) used in one cluster in FIG. 10 are ten AUNs (Address Unit Numbers), and six AUNs from AUN0 to AUN5 are not used yet. Here, the OPC execution size, which is a size necessary for performing the current OPC process, can be variously set as a predetermined size by the optical recording / reproducing apparatus. In this embodiment, the size is assumed to be four AUNs from AUN2 to AUN5.

Therefore, if you want to perform new OPC from AUN2 it is necessary to search to the physical location corresponding to the AUN2.

Therefore, in order to determine the starting position of the OPC through the wobble count, the wobble count reference position should be found. When a predetermined reference wobble is detected during the detection process of the optical recording / reproducing apparatus, the wobble count reference position is regarded as the wobble count reference position. The location is preferably the starting location of the cluster.

That is, the start position of the cluster which is the wobble count reference position coincides with the start position of the ADIP word. Referring to FIGS. 7 and 8, the start position of the ADIP word is the first 9 of the ADIP word. The dog ADIP units are in sequence "monotone unit", "sync_0 unit", "monotone unit", "sync_1 unit", "monotone unit", "sync_2 unit", "monotone unit", "sync_3 unit", Since it consists of a "reference unit", when the first nine ADIP units of the ADIP word are sequentially detected or a first "monotone unit" is detected in the search of the optical recording / reproducing apparatus, the start position of the ADIP word is detected. Becomes That is, the cluster start position is regarded as a wobble count reference position.

As another embodiment of the wobble count reference position, it is preferable that the ADIP word start position in one cluster becomes the wobble count reference position.

In other words, one cluster is composed of three ADIP words. If the next OPC start position is in the area of ADIP word 1 or in the area of ADIP word 2, the first nine ADIP units of the ADIP word indicating the start of ADIP word 1 or ADIP word 2 are sequentially Detected as "monotone unit", "sync_0 unit", "monotone unit", "sync_1 unit", "monotone unit", "sync_2 unit", "monotone unit", "sync_3 unit", or "reference unit" When the "monotone unit" is detected, the number of wobbles is counted by using the start position of the ADIP word 1 or the ADIP word 2 as the wobble count reference position.

Therefore, when the wobble count reference position is determined and the used OPC area, which is the recorded area, and the size of the OPC required to perform the current OPC process, the optical recording / reproducing apparatus starts wobble counting at the wobble count reference position. The drive searches for the desired OPC starting position.

In the embodiment of FIG. 10, the drive counts the wobble of two AUNs, AUN0 and AUN1. Since one AUN corresponds to a 868 wobble length, two AUNs count the number of 868 * 2 wobbles to determine the OPC starting position. In this case, the OPC process for calculating the optimal recording power is performed at the determined OPC start position.

10 is a diagram for explaining a recording / reproducing apparatus of a recording medium according to the present invention.

Referring to FIG. 10, the optical recording and reproducing apparatus is composed of a recording and reproducing unit 20 for recording data on or reproducing the recorded data and a control unit 12 for controlling the same.

The recording / reproducing section 20 includes a pickup section 11 for directly recording data on the optical disk or reading data recorded on the optical disk, and receiving a signal read out from the pickup section 11 to obtain a desired signal value. And a signal processor 13 for modulating and transmitting the signal to be recorded to a signal recorded on the optical disk, and picking up to accurately read the signal from the optical disk or to accurately record the signal on the optical disk. The servo unit 14 for controlling the unit 11, the memory 15 for temporarily storing management information and data, and the microcomputer 16 for controlling the components are basically configured.

In addition, the recording and reproducing unit 20 performs a test in a test area of a recording medium to calculate an optimum recording power, records the calculated optimal recording power, and applies the calculated optimal recording power to the control unit 12. Record in the recording medium according to the recording command of

In addition, the other function of the recording and reproducing unit 20 determines whether or not a format that is an initialization of an optical disk, which is a recording medium, and performs formatting when the optical disk is not formatted.

In this regard, a recording / reproducing apparatus composed of only the recording / reproducing section 20 is also referred to as a “drive”, and is utilized as a computer peripheral device.

In addition, the control unit 12 is responsible for the control of the entire component, in particular in the context of the present invention with reference to the user command, etc. through the interface (interface) with the user, recording for recording or reproducing data on the optical disk The reproducing command is transmitted to the recording and reproducing section 20.

In addition, the decoder 17 decodes a signal read out from the optical disc under control of the controller 12, restores the signal 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 control unit 12, the input signal is converted into a signal of a specific format and provided to the signal processing unit 13.

Hereinafter, a recording medium recording method using the optical recording and reproducing apparatus according to the present invention will be described in detail with reference to FIGS. 12 to 13.

12 is a flowchart illustrating an embodiment of a method of recording a recording medium according to the present invention.

According to Fig. 12, an optical disc having a physical structure including an OPC area and / or a DCZ area is loaded into the optical recording / reproducing apparatus (S11).

After the step S11, the microcomputer 16 in the optical recording and reproducing apparatus recording and reproducing section 20 controls the pickup section 11 through the servo 14 to detect the information of the loaded optical disk so that the optical disk has a disk. It is determined whether or not the disk has been formatted (S12).

As a result of the determination of the format in the step S12, when the disk has been formatted, the OPC process for calculating the optimal recording power is performed (S13).

Here, various embodiments will be described with respect to a method of performing an OPC process in the case of a dual layer including the layer 0 (L0) and the layer 1 (L1) described above.

In the first embodiment, the OPC process for calculating the optimal recording power of L0 is performed using the OPC0 region and the DCZ0 region, and at the same time, the OPC process for calculating the optimal recording power of L1 is performed using the OPC1 region and the DCZ1 region. do. In this case, the control unit 12 which transmits a user's command may be controlled by the user regarding which area of the test area to perform the OPC first.

That is, the first embodiment calculates the optimum recording power of the test area, records the calculated information in the test area, and then uses the calculated optimal recording power when recording data in the data area.

In a second embodiment, first, an OPC process for calculating optimal recording power is performed using the OPC0 region and the DCZ0 region, which are the test regions of L0, and the OPC process is performed in the OPC1 region and the DCZ1 region, which are the test regions of L1. When the user's recording command is transmitted through 12), OPC is performed to calculate the optimum recording power when actually recording the L1 area.

In this case, the control unit 12 which transmits a user's command can be controlled by the user about whether to first perform the OPC in the OPC0 or DCZ0 area.

In a third embodiment, an OPC process for calculating optimal recording power is performed by using an OPC0 area, which is a test area of an inner area 0 of an optical disk, and an OPC1 area, which is a test area of an inner area 1; In the DCZ0 area, which is the test area of the outer area 0 of the optical disc, and the DCZ1 area that is the test area of the outer area 1, the OPC process is performed by a user's recording command through the control unit 12. When performing recording on the optical disc, OPC for optimum recording power calculation is performed.

In this case, the control unit 12 which transmits a user's command can be controlled by the user about whether to first perform OPC in the OPC0 area or the OPC1 area in which the test is performed.

In a fourth embodiment, an OPC process for calculating optimum recording power is performed by using an OPC0 area, which is a test area of an inner area 0 of an optical disc, and a test area of an optical disc outer area 0. In the DCZ0 area, the OPC1 area and the DCZ1 area which are the test areas of L1, if the user's recording command is transmitted through the control unit 12, the OPC for calculating the optimum recording power when recording to the optical disc is performed. To perform.

In addition, when recording data in the vicinity of the inner circumference of the optical disk data area, the optimum recording power calculated in the OPC area in the inner area is utilized, and when data is recorded in the vicinity of the outer circumference of the optical disk data area. By utilizing the optimum recording power calculated in the DCZ area in the outer area, it is possible to apply the optimum recording power according to the data recording position.

 That is, the optimum recording power applied to the inner and outer circumference of the disk is calculated using the results calculated in the OPC area and the DCZ area near the area, respectively. In recording, it is possible to prevent data recording errors that may occur by applying the same recording power to the entire data area in advance.

In addition, depending on the usage example, instead of using the optimum recording power calculated in the OPC area and the DCZ area as it is, the final recording power is determined by weighting the optimum recording power according to the data recording position, or recording the data. If the position is near the middle of the data area, it is also possible to utilize the average value of the calculated optimal recording powers.

Regarding the case of the second embodiment, for example, in the case of L0, since OPC is performed to calculate the optimum recording power, data may be recorded using the optimal recording power obtained in advance according to the position of the data area in which data is to be recorded.

However, in the case of L1, it depends on the position of the data area where data is to be recorded. When data is recorded in the vicinity of the inner circumference of the optical disc data area, it is calculated by performing the OPC process in the OPC1 area in the inner area 1. Data using the optimal recording power calculated by performing the OPC process in the DCZ1 area in the outer area 1 when utilizing the optimal recording power that has been recorded and recording data near the outer periphery of the optical disc data area. The data may be recorded using the optimal recording power according to the position.

Although the example of the second embodiment has been described above, it will be apparent that the same applies to the first embodiment, the first embodiment, and the fourth embodiment.

In the above description, the method of performing the OPC process in the case where the disc as a recording medium is a dual layer has been described. In the case where the disc described above is a single layer, there is only one recording layer. In the case of performing OPC in both OPC0 and DCZ areas, and performing OPC process only in the OPC0 area and performing OPC process in the DCZ area, when OPC is required while the disc is in use, that is, when a user's recording command is transmitted, When performing recording, OPC for optimal recording power calculation is performed.

It is apparent that the method of performing the OPC process described above is applicable to at least one or more cases of a layer, which is a recording layer.

In addition, in the step S13, when performing the OPC process, if the optical disk has previously used the test area for the test, the OPC start position must be searched for performing the OPC process in the unused test area. It is preferable to search the OPC start position by the method described in FIG.

As a result of the determination of the format in the step S12, when the disc is not formatted, the recording and reproducing unit 20 determines whether there is a format command from the outside (S14).

Then, in the step S14, as a result of determining whether or not a format command, if there is a format command from the control unit 12, the recording and reproducing unit 20 performs format to calculate the optimal recording power. OPC process is performed (S15).

The method of performing the OPC process in step S15 is preferably made in the same manner as in the various embodiments described in step S13.

In the case of the step S15, since the OPC process is performed while formatting, the test for calculating the optimum recording power for data recording has never been performed. In this case, the OPC process is performed at an available position of the test area. .

The optimal recording power is calculated by performing the OPC process in steps S13 and S15, and the calculated optimal recording power is recorded in the test area (S16).

Thereafter, when a user's recording / playback command is transmitted through the control unit 12, the recording / playback unit 20 records on the disc or plays back the information recorded on the disc (S17).

In this regard, it is preferable to perform a test for calculating the optimum recording power only in the OPC area for the recording medium having the OPC area but no DCZ area.

Hereinafter, a recording medium recording method in a case where the optical disc is formatted but does not immediately perform an OPC process even when the optical disc which is a recording medium is loaded in the optical recording apparatus will be described with reference to FIG. 13.

First, even if the recording medium is loaded into the optical recording and reproducing apparatus, the recording and reproducing unit 20 waits without performing the OPC process (S21).

In step S21, the controller 12 determines whether there is a recording command (S22), and if there is a recording command, performs an OPC process in a test area for recording data, and calculates an optimum recording power (S23). The recorded optimal recording power in the test area.

In addition, data corresponding to a recording command is recorded in the data area of the recording medium using the calculated optimal recording power (S24).

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

 Through the recording and reproducing method and apparatus of a recording medium having a physical structure including the OPC area and the DCZ area of the preferred recording medium according to the present invention, it can be utilized not only when manufacturing Blu-ray Disc (BD) under development recently, There is an advantage in that the recording medium can be efficiently tested and recorded / reproduced.

Claims (19)

A recording medium comprising a plurality of recording layers, wherein the recording layer includes an inner area, a data area and an outer area. A first recording layer including a first test area and a control information area configured in a high frequency modulated (HFM) modulation scheme in the inner area, and a third test area in the outer area; And A second recording layer including a second test region in the inner region and a fourth test region in the outer region, The control information area in the first recording layer is assigned to a position that is physically partly or wholly identical to the second test area in the second recording layer with respect to the advancing direction of the light beam, The first test area in the first recording layer is assigned to a physically different position with respect to the advancing direction of the light beam and the second test area in the second recording layer, And a third test area in the first recording layer is allocated at a position that is physically partly or wholly identical to the fourth test area in the second recording layer with respect to the advancing direction of the light beam. The method of claim 1, And the first to fourth test areas are configured in the same modulation scheme as the data area. The method of claim 1, The first to fourth test areas are OPC (Optimum Power Control) area. The method of claim 1, The modulation method constituting the first to fourth test areas is a modulation method in which a minimum shift keying (MSK) modulation and a harmonic modulated wave (HMW) modulation are applied. A method of recording data on a recording medium comprising first and second recording layers, wherein the first and second recording layers comprise an inner area, a data area and an outer area. , Reading out location information indicating available positions in a test area assigned to the recording medium as management information recorded in the recording medium; Performing an OPC process for calculating an optimum recording power at a usable position in the test area identified from the read position information; And Recording the data in the recording medium by applying the calculated optimal recording power; An inner region of the first recording layer includes a control information region configured by a first test region and a high frequency modulated (HFM) modulation scheme, and a third test region in the outer region of the first recording layer; A second test region in the inner region of the second recording layer, a fourth test region in the outer region of the second recording layer, The control information area in the first recording layer is assigned to a position that is physically partly or wholly identical to the second test area in the second recording layer with respect to the advancing direction of the light beam, The first test area in the first recording layer is assigned to a physically different position with respect to the advancing direction of the light beam and the second test area in the second recording layer, And a third test area in the first recording layer is allocated at a position that is physically partly or wholly identical to the fourth test area in the second recording layer with respect to the advancing direction of the light beam. The method of claim 5, And the first to fourth test areas comprise the same modulation method as the data area. The method of claim 5, And the first to fourth test areas are an OPC (Optimum Power Control) area. The method of claim 5, And a modulation method constituting the first to fourth test areas is a modulation method in which a minimum shift keying (MSK) modulation and a harmonic modulated wave (HMW) modulation are applied. The method of claim 5, The performing of the OPC process may include performing an OPC process on all test areas included in the recording medium. The method of claim 5, The performing of the OPC process may include performing the OPC process only in a test area included in the second recording layer. The method of claim 5, The performing of the OPC process may include performing the OPC process only in a test area within the inner area of the recording medium. The method of claim 5, The performing of the OPC process may include performing the OPC process only in the second test area. An apparatus for recording data on a recording medium including first and second recording layers, wherein the first and second recording layers include an inner area, a data area and an outer area. , A pickup unit which reads data from the recording medium or records data on the recording medium; And The pickup unit may be controlled to read position information indicating a usable position in a test area assigned to the recording medium as management information recorded in the recording medium, and may be used in the test area identified from the read position information. A control unit for performing an OPC process for calculating an optimum recording power at a position, and applying the calculated optimal recording power to record data in the recording medium; An inner region of the first recording layer includes a control information region configured by a first test region and a high frequency modulated (HFM) modulation scheme, and a third test region in the outer region of the first recording layer; A second test region in the inner region of the second recording layer, a fourth test region in the outer region of the second recording layer, The control information area in the first recording layer is assigned to a position that is physically partly or wholly identical to the second test area in the second recording layer with respect to the advancing direction of the light beam, The first test area in the first recording layer is assigned to a physically different position with respect to the advancing direction of the light beam and the second test area in the second recording layer, And a third test area in the first recording layer is allocated at a portion that is physically partly or wholly identical to the fourth test area in the second recording layer with respect to the advancing direction of the light beam. The method of claim 13, And the first to fourth test areas are configured in the same modulation method as the data area. The method of claim 13, And the first to fourth test areas are an OPC (Optimum Power Control) area. The method of claim 13, And a modulation method constituting the first to fourth test areas is a modulation method in which a minimum shift keying (MSK) modulation and a harmonic modulated wave (HMW) modulation are applied. delete delete delete

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