JP2008512817A - Method and apparatus for recording data on a recording medium - Google Patents

Abstract

  A method and apparatus for recording data on a recording medium is disclosed. A method for recording data on a recording medium including a wobble-shaped test area includes (a) a step of determining an used test area, and (b) counting the number of wobbles at a wobble count reference position. Searching for the current OPC start position; (c) executing an optimum power control (OPC) process to calculate the optimum recording power at the OPC start position; and (d) using the calculated optimum recording power. And recording data in the data area. Therefore, the recording medium can be applied to the BD manufacturing method, and the disk test process and the data recording / reproducing operation can be effectively executed.

Description

  The present invention relates to a method and apparatus for recording data on a recording medium. More specifically, the present invention determines the starting position of a test area when data is recorded on the recording medium, and stores information on such starting position on the recording medium. The present invention relates to a recording method and apparatus.

  In general, optical discs that serve as recording media capable of recording large volumes of data are widely used. Among them, in recent years, high-density optical recording media that can record and store high-quality video data and high-quality audio data for a long period of time, such as Blu-ray Disc (registered trademark): BD, have been developed. Has been.

  Blu-ray Disc (BD) based on next-generation recording media technology is considered to be a next-generation optical recording solution that can store data that far exceeds the capacity of existing DVDs. Recently, many developers have conducted intensive research on international standard technical specifications related to BD along with international standard technical specifications of other digital devices.

  However, a desirable data recording method used for BD has not yet been established, and many limitations and problems occur in the development of an optical recording / reproducing device based on BD.

  Accordingly, the present invention is directed to a method and apparatus for recording data on a recording medium that substantially solves one or more of the problems and limitations of the prior art described above.

  It is an object of the present invention to provide a method and apparatus for determining the start position of a test area on a recording medium such as a BD and making maximum use of a finite recording area.

  Additional advantages, objects, and features of the present invention will be set forth in part in the following description, and in part will be apparent to those skilled in the art in the following discussion and may be understood from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written drawings as well as the detailed description of the invention and the claims.

  A record comprising a wobble-shaped test area, as embodied and broadly described herein, to achieve the above objects and other advantages, and in light of the objects of the present invention. A method for recording data on a medium includes: (a) determining a pre-used test area; and (b) counting the number of wobbles at a wobble count reference position to determine the current OPC of the test area. (C) a step of searching for a start position; (c) executing an optimum power control (OPC) process to calculate an optimum write power at the OPC start position; Recording data in the data area using the optimum recording power.

  According to another aspect of the present invention, a method for recording data on a recording medium including a wobble-shaped test area includes: (a) a step of determining an used test area; and (b) a wobble at a wobble count reference position. (C) OPC retrieved by executing an optimal power control (OPC) process, and a step of retrieving a current OPC start position of the same test area as the information in the matching table by counting the number of Calculating an optimum recording power at the start position; and (d) recording data in the data area using the calculated optimum recording power.

  According to another aspect of the present invention, a method for searching for an OPC start position of a recording medium including a wobble-shaped test area includes: (a) determining an already used test area in the test area; and (b) A step of determining a wobble count start reference position by checking ADIP (Address In Pre-groove) word start information; and (c) OPC of the recording medium by counting the number of wobbles at the wobble count start reference position. Searching for an execution start position.

  According to another aspect of the present invention, a method for searching for an OPC start position of a recording medium including a wobble-shaped test area includes: (a) determining an already used test area in the test area; and (b) A step of determining the start reference position of the wobble count by checking ADIP (Address In Pre-groove) word start information, and (c) counting the number of wobbles corresponding to the matching table at the start reference position of the wobble count To search for the OPC execution start position of the recording medium.

  According to still another aspect of the present invention, an apparatus for recording data on a recording medium includes a memory for storing matching table information, a control apparatus for transmitting a recording instruction, a recording instruction from the control apparatus, and a recording medium The OPC start position is searched in the test area, the OPC process is executed at the searched OPC start position, the optimum recording power is calculated, and the recording / reproducing unit for recording the information on the calculated optimum recording power, and the command word And a control device for controlling recording / reproduction.

  The description of the means for solving the above-mentioned problems according to the present invention and the description of the embodiments to be described later are exemplary and for the purpose of explanation, and are intended to provide further description of the present invention. Should be understood.

  The foregoing general description and the following detailed description of the invention are exemplary and explanatory and are intended to provide further explanation of the invention as set forth in the claims. You should understand that.

  Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the other drawings to refer to the same or like elements.

  Before describing the present invention, most of the terms disclosed in the present invention correspond to common terms widely used in the art, but specific terms are arbitrarily chosen by the applicant, In this case, the meaning is described in detail in the detailed explanation part of the corresponding invention. Accordingly, terms defined by the applicant are preferably understood based on the meaning of those terms in the present invention.

  The term “recording medium” used in the present invention refers to all recording media that can be recorded by various recording methods, and includes, for example, optical disks and magnetic tapes. Hereinafter, for the convenience of explanation and for better understanding of the present invention, an optical disc such as a BD is used as an example of the recording medium of the present invention. The technical idea of the present invention can be applied to other recording media without departing from the scope and spirit of the present invention.

  The term “OPC (Optimum Power Control) area” means a predetermined area allocated to execute an OPC process in a recording medium. The term “OPC (Optimum Power Control)” means a predetermined process capable of calculating the optimum recording power when data is recorded on a recordable optical disc.

  That is, when an optical disc is loaded into a specific optical recording / reproducing device, the optical recording / reproducing device repeatedly performs a predetermined process for recording data in the OPC area of the optical disc and a predetermined process for reproducing recorded data. To calculate the optimum recording power applicable to the optical disc. Thereafter, the optical recording / reproducing device uses the calculated optimum recording power when recording data on the optical disc. Therefore, an OPC area is required for an optical disc that can be recorded.

  The term “DCZ (Drive Calibration Zone) area” means a specific area used by an optical recording / reproducing device (or “drive”) in a recording medium, and this area is not only an OPC process but also an optical Various tests required for recording / playback devices can also be performed.

  Here, the OPC area and the DCZ area can be used for the OPC process. According to the present invention, the OPC area and the DCZ area are generally designated as test areas or test zones. OPC execution in the OPC area is also applicable in the DCZ area.

  FIG. 1 is a diagram showing the structure of a single layer optical disc capable of recording data according to the present invention. For convenience of explanation, a single layer BD-R capable of recording data is shown in FIG.

  Referring to FIG. 1, the optical disc includes an internal area, a data area, and an external area in order based on the internal environment of the disk. A specific area included in each of the internal area and the external area is used as a recording area or a test area for recording disc management information. The data area records actual user data.

  Hereinafter, the inner region and the outer region will be described in detail. The internal area includes a PIC (Permanent Information & Control data) area, an OPC area, and two information areas (that is, info-areas) IN1 and IN2. The PIC area records disc management information as an embossed HFM (High Frequency Modulated) signal. The OPC area that serves as the test area is adapted to perform the OPC process. Information areas IN1 and IN2 record various disk management information including DMA (Defect Management Area).

  In this case, the write-once BD-R further includes a TDMA (Temporary Disc Management Area) adjacent to the OPC area.

  Hereinafter, the external area will be described in detail. The external area includes two other information areas IN3 and IN4, a DCZ area, and a protection area Pr3.

  The BD-R according to the present invention records data in a groove portion in a recording layer composed of a land portion and a groove portion. The groove part is composed of an HFM groove and a wobble groove.

  In particular, the wobbled groove is configured in the form of a wobbled shape using a modulation method associated with a sine wave in the groove included in the recording layer. The optical recording / reproducing device can read the address information of the corresponding groove (that is, ADIP: Address In Pre-groove) and general disc information using the wobble shape described above.

  FIG. 2 is a diagram showing a dual layer optical disc structure capable of recording data according to the present invention.

  More specifically, FIG. 2 shows a dual layer write-once BD-R capable of recording data. In this case, one of the two recording layers is called “Layer0 (L0)”, and the remaining one recording layer is called “Layer1 (L1)”.

  As shown in FIG. 2, according to the present invention, the individual recording layers have the same structure in the write-once dual layer BD-R. The internal area of the recording layer L0 includes an OPC area as a test area, and the internal area of the recording layer L1 includes a DCZ area as a test area.

  Therefore, when a disc is loaded on the optical recording / reproducing device, the optical recording / reproducing device calculates an optimum recording power using an OPC process in the OPC area and / or the DCZ area. That is, when a disc is loaded on the optical recording / reproducing device, the optical recording / reproducing device performs an optical recording / reproducing operation as in a single layer optical disc structure.

  Hereinafter, an area for storing test area management information will be described.

  FIG. 3 is a conceptual diagram illustrating a method for performing an OPC process according to the present invention.

  The recording medium tracking direction of the optical recording / reproducing device in the recording medium is determined by the PSN increasing direction in which the PSN (Physical Section Number) increases. The direction in which the OPC process is performed on the recording medium is determined by the PSN decreasing direction in which the PSN decreases from the high PSN to the low PSN.

  The recording direction after the OPC process is determined by the PSN increasing direction from the low PSN to the high PSN similarly to the tracking direction.

  In relation to the above description, the unit for recording data in the data area of the recording medium is one cluster unit, and the unit for recording data by executing the OPC process in the OPC area is one cluster unit. However, the data recording area acquired by the OPC process may be less than one cluster or may exceed one cluster.

  For example, the unit of data recorded for executing the OPC process is the same as an AUN (Address Unit Number). AUN indicates address information used during the data recording time. It is obvious to those skilled in the art that an unused OPC area that functions as a prior area formed before data recording does not include the AUN information described above.

  In this case, the AUN functions as a unit having a range less than the cluster, and a single cluster includes 16 AUNs.

  More specifically, the execution length of a single OPC process is selected by the optical recording / reproducing device and is not limited by the number of physical clusters.

  Therefore, as described above, when the data acquired by the OPC process is recorded, the data is recorded in AUN units instead of in cluster units. More specifically, since the BD-R has a limited OPC area and the once used OPC area cannot be reused, the BD-R needs to use the limited OPC area as much as possible. There is. Therefore, it is very important to determine the starting position of a new OPC process in the cluster.

  FIG. 3 shows the specific case where three OPC processes are performed. More specifically, FIG. 3 shows a plurality of parts each performing an OPC process and a plurality of OPC markers for identifying individual parts.

  The part that executes the first OPC process is indicated by “Cluster # P + 1”, the first part indicated by “OPC # M”, the second part indicated by “OPC Marker # M”, including. The “OPC #M” portion records data, and the “OPC Marker #M” identifies the “OPC #M” portion.

  The part that executes the second OPC process includes a part of “Cluster #P”, “Cluster #N”, and “Cluster # N−1”. The portion indicated by “OPC # M + 1” records data, and “OPC Marker # M + 1” identifies the portion “OPC # M + 1”.

  The portion for executing the third OPC process is constituted by a part of the “Cluster # N-1” portion. More specifically, the part that executes the third OPC process includes “OPC # M + 2” and “OPC Marker # M + 2”. The “OPC # M + 2” portion records data, and the “OPC Marker # M + 2” portion identifies the “OPC # M + 2” portion. In this case, a part of “Cluster # N-2” and “Cluster # N-1” positioned before the “OPC Marker # M + 2” part functions as an unused cluster area.

  Further, in connection with the above description, among the OPC markers that can identify the data recording area associated with the OPC process, the distance between two consecutive OPC markers is a predetermined length corresponding to 16 clusters. Is less than or equal to For example, an OPC marker must be inserted into the OPC process in order to meet the above requirements in an OPC process that requires at least 16 clusters. In this case, the OPC marker described above needs to have a predetermined length corresponding to at least 868 NWLs (Nominal Wobble Lengths).

  The portion “OPC # M” shown in FIG. 3 occupies a single cluster (that is, one cluster) in the OPC area. The portion “OPC # M + 1” occupies a predetermined area larger than one cluster in the OPC area. The portion “OPC # M + 2” occupies a predetermined area smaller than one cluster in the OPC area. It can be understood that the OPC process is executed in units smaller than the cluster unit, for example, AUN unit.

  Therefore, the portion of “OPC # M + 2” recorded by the final OPC process occupies a predetermined area smaller than one cluster in the OPC area, and the portion “A” indicating a part of “Cluster # N−1” is unused. It remains.

  FIG. 4 is a conceptual diagram showing a relationship among a cluster, an ADIP (Address In Pre-groove) word, an AUN (Address Unit Number), an ADIP unit (ADIP unit), and a wobble according to the present invention.

  Referring to FIG. 4, one cluster in the OPC area is shown in FIG. One cluster includes 13944 wobbles and includes 249 ADIP units. One cluster corresponds to 498 sync frames and 3 ADIP words. In this case, as shown in FIG. 4, the three ADIP words are an ADIP word 0 (ADIP word 0), an ADIP word 1 (ADIP word 1), and an ADIP word 2 (ADIP word 2).

  Further, in connection with the above description, one ADIP word includes 83 ADIP units, and the ADIP unit includes 56 wobbles. One cluster contains 16 AUNs. In this case, a single AUN corresponds to a length of 868 wobbles and corresponds to 15.5 ADIP units. The wobble indicates NWL (Nominal Wobble Length).

  FIG. 5 is a diagram illustrating a matching table among an AUN, an ADIP word, and an ADIP unit according to the first preferred embodiment of the present invention.

  Referring to FIG. 5, since the length of 1 AUN is the same as the length of 15.5 ADIP units, the individual ADIP word at the start position of the individual AUN matches the ADIP unit included in the individual ADIP word. The result is like a table.

  AUN0 shown in FIG. 5 corresponds to “0ADIP unit” of “ADIP word 0”. AUN1 corresponds to “15.5 ADIP unit” of “ADIP word 0”. AUN2 corresponds to “31 ADIP unit” of “ADIP word 0”. AUN3 corresponds to “46.5 ADIP unit” of “ADIP word 0”. AUN4 corresponds to “62 ADIP unit” of “ADIP word 0”. AUN5 corresponds to “77.5 ADIP unit” of “ADIP word 0”.

  AUN from AUN6 corresponds to the area of “ADIP word 1”.

  AUN6 corresponds to 10 ADIP units of “ADIP word 1”. AUN7 corresponds to 25.5 ADIP units of “ADIP word 1”. AUN8 corresponds to 41 ADIP units of “ADIP word 1”. AUN9 corresponds to 56.5 ADIP units of “ADIP word 1”. AUN10 corresponds to 72 ADIP units of “ADIP word 1”.

  AUN from AUN11 corresponds to the area of “ADIP word 2”.

  AUN11 corresponds to 4.5 ADIP units of “ADIP word 2”. AUN12 corresponds to 20 ADIP units of “ADIP word 2”. AUN 13 corresponds to 35.5 ADIP units of “ADIP word 2”. AUN 14 corresponds to 51 ADIP units of “ADIP word 2”. AUN15 corresponds to 66.5 ADIP units of “ADIP word 2”.

  The information related to the matching table between the AUN and ADIP unit shown in FIG. 5 is information stored in the optical recording / reproducing device.

  FIG. 6 is a diagram illustrating an example in which a single ADIP word according to the present invention is composed of 83 ADIP units.

  As can be seen from FIG. 6, the first nine ADIP units of the ADIP word are “montone unit”, “sync_0 unit”, “montone unit”, “sync_1 unit”, “montone unit”, “sync_2 unit”, It includes “monotone unit”, “sync_3 unit”, and “reference unit”.

  The ADIP units from the 10th ADIP unit (ie, ADIP unit number = 9) to the 83rd ADIP unit (ie, ADIP unit number = 82) are each one of “data — 0 unit” or “data — 1 unit”. Consists of. The 15 units are formed by combining ADIP units by 4 bits, and the unit thus formed is called “ADIP codeable number (c0 to c14)”.

  In the above-mentioned “ADIP codeable number (c0 to c14)”, the physical address (that is, “PAA”: Physical ADIP Address) and auxiliary data (AUX) of the corresponding wobble are recorded. The optical recording / reproducing device can read a single ADIP word and recognize the current disc PAA position.

  FIG. 7 is a conceptual diagram illustrating a method for searching for an OPC start position using a wobble count process according to the present invention.

  Referring to FIG. 7, the used (ie, last used) OPC area included in one cluster (ie, AUN6 to AUN15) indicates 10 AUN, and the unused OPC area indicates 6 AUN of AUN0 to AUN5. . The AUN 6 in the last used OPC area can be detected by inserting an OPC marker before AUN 6 as described in FIG.

  The OPC execution size indicating the predetermined size required for the current OPC process is already determined by the optical recording / reproducing device, and can be established in various ways. Assume that the OPC execution size is equal to 4 AUN from AUN2 to AUN5.

  Thus, if the user wishes to perform a new OPC process from a predetermined location in AUN2, the user must search for the physical location corresponding to AUN2.

  The wobble information is adapted to retrieve the physical location corresponding to AUN2. The OPC start position must be found based on ADIP information indicating wobble address information shown in FIG.

  In order to determine the OPC start position using the wobble count process, it is required to search for the wobble count reference position. When a predetermined reference wobble is detected in the detection process of the optical recording / reproducing device, the detected reference wobble is considered to be the wobble count reference position. Preferably, the wobble count reference position may be the same as the start position of the cluster.

  The cluster start position indicating the wobble count reference position is the same as the ADIP word start position. Referring to FIG. 6, the first nine ADIP units of the ADIP word are “montone unit”, “sync_0 unit”, “montone unit”, “sync_1 unit”, “montone unit”, “sync_2 unit”. , “Montone unit”, “sync — 3 unit”, and “reference unit”. Therefore, during the search time of the optical recording / reproducing device, the ADIP word start position is established when the first nine ADIP units of the ADIP word are detected in sequence or when the first “monotone unit” is detected. The That is, the cluster start position is considered to be the wobble count reference position.

  According to another example of the reference position described above, the ADIP word start position included in one cluster can be considered as the wobble count reference position.

  In other words, one cluster includes three ADIP words. It is assumed that one cluster includes “ADIP word 0”, “ADIP word 1”, and “ADIP word 2”. In this case, if the next OPC start position is in the “ADIP Word 1” area or the “ADIP Word 2” area, the first nine ADIP units of the ADIP word indicating the start position of the “ADIP Word 2” area are: Corresponding to “montone unit”, “sync — 0 unit”, “montone unit”, “sync — 1 unit”, “montone unit”, “sync — 2 unit”, “montone unit”, “sync_3 unit”, “en”, “ce”, and “ce”. However, when the first “monotone unit” is detected, the start position of the “ADIP Word 1” area or the start position of the “ADIP Word 2” area is determined to be the wobble count reference position, and the number of wobbles is counted. .

  Therefore, when the wobble count reference position is determined and the size information of the used OPC area that operates as the recorded area and the size information of the OPC area necessary for the current OPC process are recognized, the optical recording / reproducing device performs the wobble. The number of wobbles is counted at the count reference position, and the OPC start position desired by the drive is searched.

  According to the preferred embodiment shown in FIG. 7, the drive counts two AUN wobbles, AUNO and AUN1. A single AUN corresponds to 868 wobble length. Therefore, two AUNs correspond to the length of 868 × 2 wobbles, and the drive counts the number of 868 × 2 wobbles to determine the OPC start position, and calculates the optimum recording power at the determined OPC start position. Perform the OPC process.

  FIG. 8A is a conceptual diagram illustrating a method for searching for an OPC start position using a matching table according to the first preferred embodiment of the present invention.

  Referring to FIG. 8A, the used OPC area indicating the recording area of one cluster is expressed by 12 AUNs of AUN4 to AUN15, and the unused OPC area is expressed by 4 AUNs of AUN0 to AUN3. .

  An OPC execution size indicating a predetermined size required for the current OPC process is predetermined by the optical recording / reproducing device and can be established in various ways. According to a preferred first embodiment of the present invention, it is assumed that the OPC execution size is equal to two AUNs, AUN2 to AUN3.

  Thus, if the user wishes to perform a new OPC process from a predetermined location in AUN2, the user must search for the physical location corresponding to AUN2.

  In order to retrieve the physical position corresponding to AUN2, the optical recording / reproducing device retrieves the information on the recording medium using the pickup unit and simultaneously retrieves the recording medium. Since the cluster start position is the same as the start position of the ADIP word 0 during the search time of the recording medium, the cluster start position and the start position of the ADIP word 0 are determined to be the wobble count reference position, and the operation of counting the number of wobbles Starts at the wobble count reference position.

  Further, in relation to the above description, when a predetermined reference wobble is detected, it is considered that the detected reference wobble is a reference position.

  As can be seen from FIG. 6, the first nine ADIP units of the ADIP word indicating the start position of “ADIP word 0” are “montone unit”, “sync — 0 unit”, “monotone unit”, “sync — 1 unit” in order. , “Montone unit”, “sync — 2 unit”, “montone unit”, “sync — 3 unit”, “reference unit”.

  However, when the first “monotone unit” is detected, the start position of “ADIP word 0” is determined as the wobble count reference position, and the number of wobbles is counted.

  Therefore, when the wobble count reference position is determined and the size information of the used OPC area that operates as the recorded area and the size information of the OPC area necessary for the current OPC process are recognized, the optical recording / reproducing device The number of wobbles is counted at the wobble count reference position, and the OPC start position desired by the drive is searched. Referring to the matching table shown in FIG. 5 according to the first preferred embodiment of the present invention, the corresponding ADIP unit number of AUN2 is 31 ADIP units of ADIP word 0.

  In this case, one ADIP unit includes 56 wobbles. When one ADIP unit composed of 56 wobbles is counted at the wobble count reference position and 31 × 56 wobbles are established, the OPC start position required by the drive operating as the optical recording / reproducing device is determined.

  Therefore, when the OPC start position is determined, an OPC process that can calculate the optimum recording power at the determined OPC start position is executed. Therefore, when a recording command for a disk operating as a corresponding recording medium is received from the optical recording / reproducing device, the recording command is executed with the calculated optimum recording power, and data is recorded in the data area.

  As another example, the ADIP word start position included in one cluster may be determined to be the wobble count reference position, and a detailed description thereof will be described with reference to FIGS. 8B and 8C.

  FIG. 8B is a conceptual diagram illustrating a method for searching for an OPC start position using a matching table according to a second preferred embodiment of the present invention.

  Referring to FIG. 8B, the used OPC area indicating the recorded area of one cluster is expressed by 8 AUNs of AUN8 to AUN15, and the unused OPC area is expressed by 8 AUNs of AUN0 to AUN7. Is done.

  An OPC execution size indicating a predetermined size required for the current OPC process is predetermined by the optical recording / reproducing device, and can be established in various ways. According to the second preferred embodiment of the present invention, it is assumed that the OPC execution size is equal to two AUNs from AUN6 to AUN7.

  Thus, if the user wishes to perform a new OPC process from a predetermined location of AUN6, the user must search for a physical location corresponding to AUN6.

  In order to search the physical position corresponding to AUN6, the optical recording / reproducing device uses the pickup unit to read the information on the recording medium and simultaneously searches the recording medium.

  During the search of the recording medium, it is determined that the start position of the ADIP word 1 is the wobble count reference position, and the operation of counting the number of wobbles is started at the wobble count reference position.

  Further, as can be seen from FIG. 6, the first nine ADIP units of the ADIP word indicating the start position of “ADIP word 1” are “monotone unit”, “sync — 0 unit”, “monotone unit”, “sync — 1” in order. It corresponds to “unit”, “monotone unit”, “sync_2 unit”, “monotone unit”, “sync_3 unit”, “reference unit”.

  However, when the first “monotone unit” is detected, the start position of “ADIP word 1” is determined as the wobble count reference position, and the number of wobbles is counted.

  Therefore, when the wobble count reference position is determined and the size information of the used OPC area that operates as the recorded area and the size information of the OPC area necessary for the current OPC process are recognized, the optical recording / reproducing device The number of wobbles is counted at the wobble count reference position, and the OPC start position desired by the drive is searched. According to the second preferred embodiment of the present invention, referring to the matching table shown in FIG. 5, the corresponding ADIP unit number of AUN 6 is 10 ADIP units of ADIP word 1.

  In this case, one ADIP unit includes 56 wobbles as in the preferred first embodiment of the present invention. When one ADIP unit composed of 56 wobbles is counted at the wobble count reference position and 10 × 56 wobbles are established, the OPC start position required by the drive operating as the optical recording / reproducing device is determined. Therefore, an OPC process that can calculate the optimum recording power at the determined OPC start position is executed.

  FIG. 8C is a conceptual diagram illustrating a method for searching for an OPC start position using a matching table according to a preferred third embodiment of the present invention.

  Referring to FIG. 8C, the used OPC area indicating the recorded area of one cluster is represented by three AUNs of AUN13 to AUN15, and the unused OPC area is represented by 13 AUNs of AUN0 to AUN12. Is done.

  An OPC execution size indicating a predetermined size required for the current OPC process is predetermined by the optical recording / reproducing device, and can be established in various ways. According to a preferred third embodiment of the present invention, it is assumed that the OPC execution size is the same for the two AUNs AUN11 to AUN12.

  Thus, if the user wishes to perform a new OPC process from a predetermined location in AUN 11, the user must search for the physical location corresponding to AUN11.

  In order to search the physical position corresponding to AUN11, the optical recording / reproducing device uses the pickup unit to read the information on the recording medium and simultaneously searches the recording medium.

  During the search of the recording medium, the start position of the ADIP word 2 is determined to be the wobble count reference position, and the operation of counting the number of wobbles is started at the wobble count reference position.

  Further, as can be seen from FIG. 6, the first nine ADIP units of the ADIP word indicating the start position of “ADIP word 2” are “monotone unit”, “sync — 0 unit”, “monotone unit”, “sync — 1” in order. It corresponds to “unit”, “monotone unit”, “sync_2 unit”, “monotone unit”, “sync_3 unit”, “reference unit”.

  However, when the first “monotone unit” is detected, the start position of “ADIP word 2” is determined as the wobble count reference position, and the number of wobbles is counted.

  Therefore, when the wobble count reference position is determined and the size information of the used OPC area that operates as the recorded area and the size information of the OPC area necessary for the current OPC process are recognized, the optical recording / reproducing device The number of wobbles is counted at the wobble count reference position, and the OPC start position desired by the drive is searched. According to the third preferred embodiment of the present invention, referring to the matching table shown in FIG. 5, the number of corresponding ADIP units of AUN11 is 4.5 ADIP units of ADIP word 2.

  In this case, one ADIP unit includes 56 wobbles as in the preferred third embodiment of the present invention. When one ADIP unit composed of 56 wobbles is counted at the wobble count reference position and a 4.5 × 56 wobble is established, the OPC start position required by the drive operating as the optical recording / reproducing device is determined. Therefore, an OPC process that can calculate the optimum recording power at the determined OPC start position is executed.

  Therefore, when the wobble count reference position is determined and the size information of the used OPC area that operates as the recorded area and the size information of the OPC area necessary for the current OPC process are recognized, the optical recording / reproducing device The number of wobbles is counted at the wobble count reference position, and the OPC start position desired by the drive is searched.

  FIG. 9 is a block diagram showing an optical recording / reproducing device according to the present invention.

  Referring to FIG. 9, the optical recording / reproducing device includes a recording / reproducing unit 20 for recording / reproducing data on / from the optical disc, and a control device 12 for controlling the recording / reproducing unit 20.

  The recording / reproducing unit 20 includes a pickup unit 11, a signal processor 13, a servo unit 14, a memory 15, and a microprocessor 16. The pickup unit 11 records data directly on the optical disc or reads data recorded on the optical disc. The signal processor 13 receives the signal read from the pickup unit 11, restores the received signal to a desired signal value, or modulates the recorded signal into another signal recorded on the optical disc, Transmit the reconstructed result or the modulated result. The servo unit 14 controls the operation of the pickup unit 11, accurately reads a desired signal from the optical disk, and accurately records the signal on the optical disk. The memory 15 temporarily stores not only management information but also data. Microprocessor 16 controls the overall operation of the components described above.

  The recording / reproducing unit 20 described above executes a predetermined test in the test area of the recording medium to calculate the optimum recording power, and records the calculated optimum recording power.

  As described above, an optical recording / reproducing device composed of only the recording / reproducing unit 20 is called a drive, and is generally used as a peripheral device of a computer.

  The control device 12 controls the operation of the overall components. In connection with the present invention, the control device 12 refers to a user command through an interface with the user, and transmits a recording / playback command capable of recording data on the optical disc or reproducing data from the optical disc to the recording / playback unit 20. .

  When receiving the control signal from the control device 12, the decoder 17 decodes the signal read from the optical disc, restores the decoded signal to desired information, and transmits the restored signal to the user.

  The encoder 18 receives a control signal for recording a desired signal on the optical disc from the control device 12, converts the received signal into a signal of a specific format (for example, MPEG2-transport stream, etc.), and so on. A signal of a specific format is transmitted to the signal processor 13.

  The memory 15 stores information of the matching table shown in FIG. The microprocessor 16 executes a recording medium test using the matching table information stored in the memory 15, calculates an optimum recording power, and can record the optimum recording power with the calculated optimum recording power. To control.

  FIG. 10 is a flowchart illustrating a method for recording data on a recording medium using an optical recording / reproducing device according to the present invention.

  Referring to FIG. 10, in step S10, when an optical disc including an OPC area and a DCZ area is loaded into an optical recording / reproducing device, the microprocessor 16 included in the recording / reproducing unit 20 uses the servo unit 14 to pick up. The operation of the unit 11 is controlled, the loaded disk is scanned, information related to the used OPC area is read, and the used OPC area is recognized.

  In addition, since the TDMA area for storing the management information of the recording medium also stores the management information related to the OPC area, information related to the used OPC area, particularly information indicating the start position of the used OPC area. Store.

  In step S20, the size of the OPC area necessary for the current OPC process is determined in advance by the optical recording / reproducing device, and the microprocessor 16 recognizes the size of the OPC area.

  Thereafter, in step S30, the wobble count reference position is determined. As already mentioned, the wobble count reference position indicates a cluster start position or a start position of “ADIP word 0”, “ADIP word 1”, “ADIP word 2” operating as an ADIP word. The nine ADIP units at the head of the ADIP word are associated with the start position of the ADIP word, and in that order, “monotone unit”, “sync_0 unit”, “montone unit”, “sync_1 unit”, “monotone unit”, “sync_2” “unit”, “monotone unit”, “sync — 3 unit”, and “reference unit”. However, when the first “monotone unit” is detected, the wobble count reference position can be recognized. It is preferable to set the start position of the ADIP word to the wobble count reference position.

  When the wobble count reference position is detected in step S30, the microprocessor 16 of the optical recording / reproducing device starts counting the number of wobbles at the determined wobble count reference position and searches for the next OPC start position in step S40. To do.

  Further, when searching for the OPC start position using the matching table, the microprocessor 16 also searches for the same wobble as the ADIP unit indicated in the matching table. More specifically, the microprocessor 16 counts the number of wobbles that are the same as the ADIP unit. In this case, the wobble count start position operates as the next OPC start position.

  The recording / reproducing unit 20 executes the OPC process to calculate the optimum recording power at the searched current OPC start position. If a corresponding disk recording command is received from the control device 12, the recording / reproducing unit 20 executes the corresponding recording command with the calculated optimum recording power and records data in the data area in step S50.

  Therefore, the present invention can search the OPC start position where the current OPC process is executed in order to effectively use the unused OPC area in the OPC area, and can execute the OPC process at the searched OPC start position. Provide a method.

  It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, it is intended that the present invention cover various modifications and variations of this invention provided they come within the scope of the claims and their equivalents.

It is a figure which shows the optical disk structure of the single layer which can record the data based on this invention. 1 is a diagram showing a dual layer optical disc structure capable of recording data according to a preferred embodiment of the present invention. FIG. It is a conceptual diagram which shows the method of performing optimal power control (OPC) based on this invention. It is a conceptual diagram which shows the relationship between the cluster which concerns on this invention, ADIP (Address In Pre-groove) word, AUN (Address Unit Number), ADIP unit, and wobble. It is a figure which shows the matching table between AUN, ADIP word, and ADIP unit based on preferable 1st Embodiment of this invention. It is a figure which shows the example in which the single ADIP word which concerns on this invention is comprised by 83 ADIP units. FIG. 5 is a conceptual diagram illustrating a method for searching for an OPC start position using a wobble count process according to the present invention. It is a conceptual diagram which shows the method to search an OPC start position using the matching table by preferable 1st Embodiment of this invention. It is a conceptual diagram which shows the method to search an OPC start position using the matching table by preferable 2nd Embodiment of this invention. It is a conceptual diagram which shows the method to search an OPC start position using the matching table by preferable 3rd Embodiment of this invention. 1 is a block diagram showing an optical recording / reproducing device according to the present invention. FIG. 3 is a flowchart illustrating a method for recording data on a recording medium using the optical recording / reproducing device according to the present invention.

Claims (23)

A method of recording data on a recording medium including a wobble-shaped test area,
(A) determining an already used test area;
(B) searching for the OPC start position of the test area by counting the number of wobbles at the reference position;
(C) performing an optimum power control (OPC) process to calculate an optimum recording power at the searched OPC start position;
(D) recording data in a data area using the calculated optimum recording power.   The method of claim 1, further comprising determining a size of an OPC area required for a current OPC process.   The method according to claim 1, wherein the recording medium is a recordable Blu-ray disc (BD-R).   The method of claim 1, wherein the test area is an OPC area positioned in an internal area.   The method of claim 1, wherein the test area is a DCZ area positioned in an external area.   The method according to claim 1, wherein the step (a) determines the used test area based on management information stored in the recording medium.   The method according to claim 6, wherein the management information is stored in a management area of the recording medium.   The method according to claim 7, wherein the management information indicates a start position of the used test area.   The method of claim 1, wherein step (b) includes determining a wobble count reference position if a predetermined reference wobble is detected.   The method of claim 1, wherein step (b) includes determining a wobble count reference position indicative of a starting position of a physical cluster.   The method of claim 1, wherein step (b) includes determining a wobble count reference position indicating a start position of an ADIP word.   The method of claim 11, wherein the start position of the ADIP word is recognized by information of an ADIP unit included in the ADIP word.   The method of claim 1, wherein the step (b) determines the OPC start position based on a size of an OPC area required for a current OPC process.   The method of claim 13, wherein the OPC start position varies depending on a size of an OPC area required for the current OPC process. A method of recording data on a recording medium including a wobble-shaped test area,
(A) determining an already used test area;
(B) retrieving the current OPC start position of the test area identical to the information in the matching table by counting the number of wobbles at the reference position;
(C) performing an optimum power control (OPC) process to calculate an optimum recording power at the searched OPC start position;
(D) recording data in a data area using the calculated optimum recording power.   The method of claim 15, wherein the matching table information includes AUN information, ADIP word information, and ADIP unit information.   The method of claim 16, wherein the ADIP unit information included in the matching table indicates ADIP unit information of an individual ADIP word. A method for searching for an optimum power control (OPC) start position of a recording medium including a wobble-shaped test area,
(A) determining an already used test area in the test area;
(B) determining a wobble count start reference position based on ADIP word start information;
And (c) searching for an OPC execution start position of the recording medium by counting the number of wobbles at the wobble count start reference position.   The method according to claim 18, wherein the test area is one of an OPC area arranged in an internal direction and a DCZ area arranged in an external direction. A method for searching for an optimum power control (OPC) start position of a recording medium including a wobble-shaped test area,
(A) determining an already used test area in the test area;
(B) determining a wobble count start reference position based on ADIP word start information;
(C) searching for the OPC execution start position of the recording medium by counting the number of wobbles corresponding to the matching table at the wobble count start reference position;
A method comprising the steps of:   The method of claim 20, wherein the matching table information includes AUN information, ADIP word information, and ADIP unit information. An apparatus for recording data on a recording medium,
A memory for storing matching table information;
The matching table information stored in the memory is used to search an optimum power control (OPC) start position in the test area of the recording medium, and an OPC process is executed at the searched OPC start position to obtain an optimum recording power. And a recording / reproducing unit for recording information of the calculated optimum recording power;
And a control device that controls the recording / reproducing unit according to a command.   The apparatus of claim 22, wherein the memory stores the matching table information including AUN information, ADIP word information, and ADIP unit information.

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