JP2008517412A - Recording medium and method and apparatus for simultaneously overwriting data - Google Patents

Abstract

A recording medium and a method and apparatus for overwriting the recording medium are provided.
A method for overwriting data on a recording medium includes a step of allocating a plurality of recording areas to the recording medium, a step of recording data of the same category in each recording area, and an overwriting command. A step of executing a replacement recording operation at a specific position indicating a near writable region; and a step of holding data of the same category in the recording region after the execution of the replacement recording operation. A method of overwriting data on a recording medium includes: assigning at least one continuous recording range (SRR) to the recording medium; recording data in the assigned SRR; and b) pre-recorded in the SRR. A step of executing a replacement recording operation in a writable area included in the SRR upon receiving an overwrite command related to the area; and c) if the writable area does not exist in the SRR, it is included in the adjacent SRR Executing a replacement recording operation in the writable area.

Description

  The present invention relates to a recording medium, and more particularly to a method and apparatus for performing a logical overwriting function when recording data on a recording medium.

  In general, a recording medium capable of recording high-quality video data and high-quality audio data for a long time, for example, a rewritable Blu-ray Disc (BD-RE: Blu-ray Disc Rewriteable) has been developed in recent years.

  FIG. 1 shows a general BD-RE structure and a method for managing defects in the BD-RE.

  As shown in FIG. 1, the BD-RE includes a lead-in zone, a data zone, and a lead-out zone. The data zone includes an inner spare area (ISA: Inner Spare Area) and an outer spare area (OSA: Outer Spare Area). The ISA is located at the front end of the data zone, and the OSA is located at the rear end of the data zone.

  The BD-RE records data in cluster units each corresponding to a prescribed recording unit. In this case, the BD-RE disc determines the presence or absence of a defective area in a data zone where data is recorded in cluster units.

  When a defective area is detected, data to be recorded in the defective area is recorded in the above-described spare area such as ISA instead of the defective area, and at the same time, positional information related to the defective area, The position information recorded in the spare area is recorded in the defect list included in the lead-in area.

  Accordingly, since data recorded in the defective area is recorded in the spare area instead of the defective area, the data recorded in the spare area instead of the defective area can be read / reproduced, so that the data is recorded / reproduced. The occurrence of unforeseen errors can be prevented.

  On the other hand, optical discs that can be written only once, such as a Blu-ray Disc Recordable (BD-R) that can be written only once, have been developed in recent years. Since BD-R can physically record data only once throughout the entire area, unlike BD-RE, data cannot be physically overwritten there.

  However, since the user may wish to edit or modify the data recorded on the BD-R, the BD-R may require a data overwrite function for the convenience of the user or the host. As a result, an efficient method must be developed that allows the BD-R to perform data overwrite yesterday.

  Accordingly, it is an object of the present invention to provide a recording medium and a method and apparatus for overwriting data on a recording medium that substantially prevent one or more problems due to limitations and disadvantages of the related art.

  An object of the present invention is to provide a method and apparatus for overwriting data on a recording medium.

Another object of the present invention is to provide a method and apparatus for logically overwriting data in a recording medium that can be written only once.
Still another object of the present invention is to provide a recording medium for the above method.

  Additional advantages, objects, and features of the present invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and obtained by this detailed description and claims, and the structure particularly pointed out in the appended drawings.

  In order to achieve these and other advantages in accordance with the purpose of the present invention, a method for overwriting data on a recording medium, as incorporated and broadly described herein, includes: a) a plurality of recording areas on a recording medium; B) recording data of the same category in each recording area, and b) receiving an overwrite command, executing a replacement recording operation at a specific position indicating the nearest writable area, Holding the same category of data in the recording area after execution.

  In another aspect of the present invention, a method for overwriting data on a recording medium is provided, the method comprising: a) allocating at least one continuous recording range (SRR) to the recording medium, and assigning the allocated SRR to the allocated SRR. B) recording data; b) receiving an overwrite command related to a pre-recorded area included in the SRR, and executing a replacement recording operation in a writable area included in the SRR; and c) SRR. And when the writable area does not exist, executing the replacement recording operation in the writable area included in the adjacent SRR.

  According to another aspect of the present invention, an apparatus for recording / reproducing data on / from a recording medium is provided. The apparatus allocates a plurality of recording areas to the recording medium, and records data of the same category in each recording area. Then, after receiving the overwrite command related to the data recording area, the replacement recording operation is executed at a specific position indicating the nearest writable area, and after the replacement recording operation, the same category in the at least one recording area is executed. A microprocessor that holds data; and a pickup unit that receives a control signal from the microprocessor and records the data on a recording medium according to the received control signal.

  In another aspect of the present invention, a recording medium is provided. The recording medium is a data zone to which a plurality of continuous recording ranges (SRR) can be assigned, and a management area, and is assigned to the data zone. Each of the SRRs receives an overwrite command related to a pre-recorded area included in the SRR, enables data to be recorded in a writable area included in the SRR instead of the pre-recorded area, and When there is no writable area, data can be recorded in a writable area included in the adjacent SRR, and the management area includes a management area for recording management information generated by the overwrite command.

  The foregoing general description of the invention and the following detailed description are both exemplary and explanatory and are intended to provide further explanation of the claimed invention.

  The accompanying drawings, which are included to provide a further understanding of the invention, and are incorporated and configured as part of the invention, illustrate embodiments of the invention and, together with the detailed description, explain the principles of the invention. To help.

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

  Preferred embodiments of the present invention are described below with reference to the accompanying drawings.

  Prior to the description of the present invention, most of the terms disclosed in the present invention correspond to common terms known in the art, although some terms are selected as required by the application and are described below. It should be noted that the following detailed description of the present invention will be disclosed hereinafter. Terms defined by the applicant are preferably understood on the basis of their meaning in the present invention.

  The “recording medium” used in the present invention refers to all recordable media, such as an optical disk, a magnetic disk, and a magnetic tape.

  For convenience of explanation and better understanding of the present invention, an optical disk that can be written only once (for example, BD-R) will be exemplarily used as the above-mentioned recording medium in the present invention.

  FIG. 2 shows a method of recording data on an optical disk (for example, BD-R) that can be written only once according to the present invention.

  Referring to FIG. 2, the BD-R includes a lead-in zone, a data zone, and a lead-out zone. The data zone includes an inner spare area (ISA), an outer spare area (OSA), and a user data area (User Data Area) that stores actual user data. The ISA is located at the front end of the data zone, and the OSA is located at the rear end of the data zone.

  The lead-in zone records various management information required for recording / reproducing data on / from the optical disc. In particular, the lead-in zone further includes a temporary disc management area (TDMA) for recording optical disc defect management and recording management information.

  TDMA is applied to update the above-described defect management information and recording management information that are frequently generated when using an optical disc. Further, TDMA may be allocated in the spare area as necessary.

  The above-described one-time writable optical disc (for example, BD-R) uses two recording methods, that is, a continuous recording mode (SRM) method and a random recording mode (RRM). ) Method.

  The SRM method divides a user data area in which actual user data is stored into several continuous areas in order to easily record data on a disc. Each of the divided areas is referred to as a track or SRR (Sequential Recording Range). The divided area is hereinafter referred to as SRR in the present invention.

  Data recording for SRR is performed in an unrecorded cluster indicating the next writable unrecorded cluster. The address of the unrecorded cluster is referred to as the next writable address (NWA; Next Writable Address). In other words, the next cluster in the pre-recorded area included in the SRR operates as an NWA, and the data recording operation starts with the NWA. Therefore, when data is continuously recorded from a specific position (that is, NWA), NWA is dynamically increased by the data recording operation.

  In this case, the SRR in which data can be recorded due to the presence of the NWA is called a reserved SRR or an open SRR. For convenience of explanation, the SRR refers to an open SRR in the present invention.

  Two or more open SRRs are assigned to perform a data recording operation. One SRR is used as a file system data area for storing information about user data, and the other SRR is used as a user data area in which user data is recorded.

  The file system data indicates the name information of the file included in the disc and the disc recording position information, so that the user data file can be recorded / reproduced in / from the disc. In other words, the host or application uses the file system data described above to record or reproduce a specific file included in the disc.

  Therefore, the file system data described above includes hierarchical file / directory name information and pointer information indicating the file / directory size / position data.

  The aforementioned SRM method may generate an overwrite command related to a pre-recorded area included in a single SRR upon receipt of an application or host request. In this case, the disk recording operation can be executed only once due to the characteristics of the BD-R, so that the data recording operation related to the previously recorded area (that is, the overwrite function) is not allowed. However, the data to be recorded in the previously recorded area can be recorded in the NWA included in the next writable user data area instead of the previously recorded area. The replacement recording operation described above is called a logical overwriting operation, unlike the physical overwriting operation of the BD-RE.

The above jy logical overwriting methods will be described below with reference to the accompanying drawings.
FIG. 3 illustrates a method for logically overwriting data on a BD-R according to a first preferred embodiment of the present invention.

  Referring to FIG. 3, after receiving a data recording command related to a pre-recorded area included in one SRR, data to be recorded in the pre-recorded area is stored in the pre-recorded area. Instead, it is recorded in the NWA indicating the next writable area.

  More specifically, when the FS data area of SRR # 1 operates as an open SRR due to the presence of NWA, data is recorded in the NWA included in SRR # 1. When the user data area of SRR # 2 operates as an open SRR due to the presence of NWA, data is recorded in the NWA included in SRR # 2.

  According to the present invention, when a data recording command relating to a prerecorded area included in an optical disk that can be written only once (that is, BD-R) occurs (that is, when an overwrite command occurs), the data is recorded in advance. Instead of the recorded area, it is recorded in the NWA closest to the area that received the overwrite command.

  Therefore, as can be seen from FIG. 3, when one SRR includes an NWA, the SRR operates as an open SRR. If the SRR has enough space to store the desired data, the data is first recorded in the corresponding SRR (ie, a replacement recording operation associated with the corresponding SRR is performed). When the replacement recording operation is executed as described above, the first position information of the area where the data overwrite command is received and the second position information of the other area where the replacement recording operation is executed are disc specific. Recorded in the area. For example, the first and second location information are recorded as LOW entries in the disc TDMA.

  The above-described position information can be indicated by the first physical sector number (PSN) of the corresponding cluster. Preferably, if the logical overwrite operation satisfies multiple cluster size information, the first PSN of the first cluster and the first PSN of the last cluster can each be recorded using two entries.

  Therefore, when the user desires to reproduce the data in the first area that has received the overwrite command with reference to the LOW entry recorded in the TDMA, the replacement record is used instead of the data stored in the first area. The data stored in the second area where the operation has been executed is reproduced.

  Therefore, even though the data to be recorded in the first area that receives the overwrite command is physically recorded in the second area that operates as the replacement area, the actual host can store the data in the overwrite command. Is recognized as being recorded in the first area.

  When performing the logical overwriting described above, the replacement recording area in which the replacement recording operation associated with the logical overwrite command is performed may be insufficient for the replacement recording operation, a detailed description of FIG. It will be described later with reference.

  More specifically, the replacement recording operation executed by the overwrite command is executed first corresponding to the SRR. However, when the area necessary for the replacement recording operation is not included in the corresponding SRR, it is preferable that data is recorded in another SRR adjacent to the corresponding SRR.

  FIG. 4 illustrates a method for logically overwriting data on a BD-R according to a second preferred embodiment of the present invention.

  As can be seen from FIG. 4, a data overwrite command associated with a pre-recorded area in SRR # 1 may be received at SRR # 1 where file system (FS) data is recorded. In this case, when SRR # 1 operates as an open SRR due to the presence of the NWA, the replacement recording operation is executed in the NWA.

  When performing the replacement recording operation described above, the replacement recording area may be sufficient for the replacement recording operation described above.

  In this case, the data replacement recording operation is executed many times corresponding to the remaining area of SRR # 1, and the remaining data on which the replacement recording operation is not executed is recorded in the NWA of the adjacent SRR. In other words, some data is recorded in the NWA of SRR # 1, and the remaining data is recorded in the NWA of another SRR adjacent to SRR # 1. FIG. 4 exemplarily shows the replacement recording operation executed in SRR # 2.

  In this case, SRR # 2 in which the replacement recording operation of the remaining data is executed may indicate a user data area. In this case, the same data is preferably recorded in one SRR.

  Preferably, SRR # 2 storing user data is closed, a new SRR is assigned, and the data is recorded in the new SRR.

  For example, the data of SRR # 1 indicates file system data. Therefore, if the file system data is recorded in SRR # 2 where user data different from the file system data is recorded, SRR # 2 is automatically closed and a new SRR is assigned, and the data is transferred to the new SRR. To be recorded.

  Therefore, the SRR # 2 storing user data is closed, a new SRR # 3 is allocated, and the remaining file system data is recorded in the SRR # 3 for the logical overwriting operation.

  As a result, the user data is recorded in SRR # 2 and the file system data is recorded in SRR # 3, so that the above data recording operation records different data units generated by the logical overwrite command in one SRR. Can be prevented.

  Thereafter, when the user desires to record the user data on the disc again, the new SRR # 4 is assigned to the disc, so that the user data is recorded on the SRR # 4.

  The above logical overwrite operation is generated from the optical disk drive. More specifically, the application or host may be as if the BD-R is a BD-RE, regardless of the pre-recorded area of the BD-R, even though the optical disc is actually equal to the BD-R. It can be freely applied to BD-R.

  Therefore, when a logical overwriting operation is performed, the application or the host does not recognize that the next recordable area (NWA) is changed to another area due to the occurrence of the above-described logical overwriting operation. .

  Thus, the file system can thus handle the specific case where an NWA is changed to another NWA to perform a logical overwrite operation. More specifically, when the file system desires to execute a data recording operation, it queries the optical disc drive for position information of the next recordable area (NWA; Next Writable Area), and data is changed to the changed NWA corresponding to the position information. Enable recording.

  On the other hand, newly assigned SRRs (ie, SRR # 3 and SRR # 4) are formed by splitting SRR # 2 for initially assigned user data.

  The second preferred embodiment of the present invention exemplarily illustrates the specific case where a replacement area is not sufficiently provided when a logical overwrite operation is performed on an SRR that includes file system (FS) data, It will be apparent to those skilled in the art that an overwrite operation can be performed in a closed SRR, all of which areas are filled with file system (FS) data.

  FIG. 5 illustrates a method for logically overwriting data on a BD-R according to a third preferred embodiment of the present invention.

  As can be seen from FIG. 5, according to the third preferred embodiment of the present invention, when the file system data area of SRR # 1 is filled with data such that SRR # 1 is closed, it is related to the new file system data. The recording command to be applied is applied to the closed SRR # 1.

  As described above, when a recording command related to a pre-recorded area is applied to SRR # 1, data to be recorded in the pre-recorded area (that is, SRR # 1) is stored in the pre-recorded area. Instead of (that is, SRR # 1), recording is performed on the NWA closest to the prerecorded area (that is, SRR # 1).

  Therefore, data is recorded in SRR # 3 including the nearest NWA instead of SRR # 1. In this case, since SRR # 3 indicates the area where the file system data is recorded, the same data as SRR # 1 is recorded in SRR # 3, so that the SRR # 3 is closed in the NWA without closing the SRR. Data will be recorded.

  A method for logically overwriting data in a closed SRR or an SRR in which user data including insufficient replacement recording area is recorded in relation to a disc on which a replacement recording operation is performed will be described with reference to FIG. This will be described below.

  FIG. 6 illustrates a method for logically overwriting data on a BD-R according to a fourth preferred embodiment of the present invention.

  As can be seen from FIG. 6, when SRR # 2 including user data is filled with data to be closed, or when SRR # 2 has insufficient replacement recording area, a new data recording command is issued. 2 may be sent.

  In this case, the data to be recorded in SRR # 2 is recorded in the nearest NWA. In other words, data is recorded in the NWA existing in SRR # 3 closest to SRR # 2.

  In this case, SRR # 3 records file system data there. Thus, when a logical overwrite operation is performed in SRR # 3 as shown in the preferred embodiment described above, different data units are mixed in SRR # 3. More specifically, although the same data is preferably recorded in one SRR, different data units actually exist in one SRR due to the occurrence of a logical overwrite operation.

  In order to solve the above problem, it is preferable that user data is continuously recorded. More specifically, the logical overwrite operation can be executed in all areas of the BD-R, but the continuous recording operation is executed only on general user data generated by the file system.

  The optical disc according to the present invention uses the “List of Open SRR” field by including the “List of Open SRR” field of the continuous recording range information (SRRI) header including information related to the open SRR. Thus, a logical overwrite operation can be easily performed on a closed SRR that stores user data, and different data units are recorded in one SRR using the “List of Open SRR” field. Can be prevented. This detailed description will be described later with reference to FIG.

  FIG. 7 is a structural diagram illustrating SRRI based on the SRM method for BD-R according to the present invention. More particularly, a logical overwriting method according to a fifth preferred embodiment of the present invention is shown in FIG.

  Referring to FIG. 7, SRRI indicates information recorded in the TDMA of the optical disc. The SRRI includes a “List of SRR entries” field and an “SRRI Terminator” field.

  The “SRRI header” field includes a “SRRI identifier =’ SR ”field as ID (identification) information indicating SRRI. The “SRRI header” field includes a “number of SRR entries” field, a “number of Open SRRs” field, and a “List of Open SRR numbers” field.

  Information indicating the number of SRR entries is recorded in the “number of SRR entries” field. Information indicating the number of open SRRs is recorded in the “number of Open SRRs” field. Information indicating a list of open SRR numbers is recorded in a “List of Open SRR numbers” field.

  Information related to the list of open SRR numbers is recorded in the “List of Open SRR numbers” field. As can be seen from FIG. 7, each of the 16 open SRR number fields from the first open SRR number field to the 16th open SRR number field is allocated in 2 bytes, so that each SRR number field is Data will be recorded there.

  In this case, the aforementioned SRR numbers are assigned in descending order, and when the number of assigned SRRs is less than 16, data of 0 is recorded in an unused open SRR number field. Therefore, the optical disk drive searches for a replacement recordable SRR by referring to the “List of Open SRR numbers” field.

  According to the present invention, when a logical overwriting operation is performed on an SRR that is closed using the above-mentioned SRRI header information, the logical overwriting operation is performed to prevent different data from existing in one SRR. This detailed description will be described later with reference to FIG.

  FIG. 8 illustrates a method for logically overwriting data on a BD-R according to a fifth preferred embodiment of the present invention.

  Referring to FIG. 8, if the optical disc drive wishes to perform a logical overwrite operation on a pre-recorded SRR or an SRR that has been closed by a user request, the closed SRR number opens the closed SRR number. It is recorded in the NWA of the open SRR corresponding to the remainder obtained when dividing by the number of SRRs.

  For example, as shown in FIG. 8, assuming that the closed SRR is the 0th, 1st, 2nd, 3rd SRR (ie, SRR0, SRR1, SRR2, and SRR3), the file system data is It is recorded in the closed SRR0 and SRR2, and the user data is recorded in the aforementioned closed SRR1 and SRR3. When the open SRR is the fourth or fifth SRR, the “List of Open SRR number” field includes “List of Open SRR [0] = 4” information and “List of Open SRR [1] = 5” information. Is stored.

  In this case, the characters in parentheses of the “List of Open SRR” information indicate the 0th open SRR and the first open SRR because the assigned open SRR is 2.

  If the optical disk drive wishes to perform a logical overwrite operation on SRR0 closed by a host or application request under the above recording conditions, the number of open SRRs is 2, and the closed SRR number is 2 by The remainder obtained when dividing will be calculated.

  Since the calculated remainder is 0, the replacement recording operation for the logical overwriting operation is performed in the NWA of the 0th open SRR (that is, the open SRR 4 having an open SRR number of 4). In this case, the closed SRR0 indicates the SRR including the file system data, so that the file system data is also recorded in the open SRR 4 in which the replacement recording operation is executed.

  When a logical overwrite command is sent to the closed SRR1, the remainder obtained when the closed SRR number “1” is divided by the number of open SRRs (ie, 2) is calculated. Since the calculated remainder is 1, the replacement recording operation for the logical overwrite operation is executed in the NWA of the first open SRR (ie, open SRR 5 having an open SRR number of 5). In this case, the closed SRR1 indicates the SRR including the user data, so that the user data is recorded also in the open SRR5 in which the replacement recording operation is executed.

  Thus, if the optical disc drive desires to perform a logical overwrite operation in the closed SRR2, the replacement recording operation is performed in the open SRR4. Open SRR 4 indicates an SRR including file system data. What is the different data unit despite the replacement recording operation for logical overwriting associated with the closed SRR2 storing file system data. Not in the same RR.

  When the optical disk drive performs a logical overwrite operation on the closed SRR3, the replacement recording operation is performed in the open SRR5. Since the open SRR 5 and the closed SRR 3 record user data there, the same data does not exist in one SRR.

  A method of recording data on a BD-R according to the present invention. This will be described below with reference to FIG.

  FIG. 9 shows a method for recording data on a BD-R according to the present invention. Referring to FIG. 9, the BD-R includes a lead-in zone, a data area, and a lead-out zone. By assigning two or more SRRs to a data zone, desired data can be recorded in the data zone.

  In this case, as shown in FIG. 9, three SRRs (that is, the first to third SRRs) are simultaneously assigned to the data zone. The first SRR records file system data, the second SRR records user data, and the third SRR records file system (FS) mirror data equal to the file system data.

  File system mirror data is equivalent to a file system and is adapted to store file system data representing important data more stably.

  Thus, when data is recorded in three SRRs while being classified by three SRRs, and when a logical overwriting operation is performed, the logical overwriting operation is performed with different data units as one SRR. It will be apparent to those skilled in the art that it can be implemented to prevent it from being present.

  FIG. 10 is a block diagram showing an optical recording / reproducing apparatus according to the present invention.

  Referring to FIG. 10, the optical recording / reproducing apparatus includes a recording / reproducing unit 10 and a host or control unit 20 that controls the recording / reproducing unit. It should be noted that the recording / reproducing unit 10 is also referred to as an optical disc drive, and therefore the recording / reproducing unit 10 is also referred to as an optical disc drive in this specification as needed.

  According to the optical recording / reproducing apparatus described above, the host 20 transmits a recording / reproducing command related to a specific area of the optical disc to the recording / reproducing unit 10, and the recording / reproducing unit 10 performs the recording / reproducing unit according to the command of the host 20. Perform playback operation.

  In this case, the recording / reproducing unit 10 includes an interface unit 12, a pickup unit 11, a data processor 13, a memory 15, and a microprocessor 16. Since the interface unit 12 communicates with the host 20, data and commands can be transmitted / received to / from the host 20. The data processor 13 receives the signal from the pickup unit 11, restores the received signal to a desired signal value, or modulates the signal to be recorded on another signal recorded on the optical disc, thereby restoring the signal. Alternatively, the modulation result is transmitted. The servo unit 14 can accurately read a signal from the optical disc or can accurately record the signal on the optical disc by controlling the operation of the pickup unit 11. The memory 15 temporarily stores various information including management information and other data. The microprocessor 16 controls the mutual operation of the above-described components included in the above-described recording / reproducing unit 10.

  A method for recording data in the BD-R using the above-described optical recording / reproducing apparatus according to the present invention will be described below.

  When an optical disc (that is, a BD-R) is placed on the optical recording / reproducing apparatus, all management information is read from the BD-R, and the read management information is stored in the memory 15, and the above-described management information is stored. Is used when data is recorded / reproduced on / from an optical disc.

  In this case, when the user desires to record data in a specific area of the optical disc and input a recording command, the host 20 receives the recording command from the user, records the desired recording position information, and records in the recording / reproducing unit 10. Send both of the data that will be done.

  In this case, the microprocessor 16 included in the recording / reproducing unit 10 receives the recording command and records data on the optical disc by the recording command.

  If the overwrite operation must be performed when data is recorded on the optical disc, the data to be recorded in the overwrite area can be recorded next to the user data area using the various methods described in the preferred embodiment. It is recorded in the area (NWA), and the data position information is recorded in the TDMA as a LOW entry.

  For the above-described recording operation, the microprocessor 16 included in the recording / reproducing unit 10 transmits the replacement recording area position information and data to the servo unit 14 and the data processor 13, thereby using the pickup unit 11. The recording operation or the replacement recording operation can be completed at a desired position included in the disc.

  A method of reproducing data from an optical disk that can be written only once (that is, BD-R) will be described later.

  When the BD-R is placed in the optical recording / reproducing apparatus, all management information is read from the D-R, the read management information is stored in the memory 15, and the above management information is recorded on / from the optical disc. Used when playing.

  In this case, when the user desires to reproduce data from a specific area of the optical disk and input a reproduction command, the host 20 receives the reproduction command from the user and transmits desired reproduction position information to the recording / reproduction unit 10. To do.

  The microprocessor 16 included in the recording / reproducing unit 10 receives the reproduction command, reads the management information stored in the memory 15, and replaces the optical disk area desired by the host 20 with another area included in the data zone. By determining whether or not, this desired data is recorded in the replacement area. More specifically, the microprocessor 16 can determine the presence or absence of the replacement recording operation with reference to the above-mentioned LOW entry information recorded in the TDMA.

  The microprocessor 16 can recognize necessary information by referring to either the status bit recorded in the flag bit included in the address unit of the replacement recording area or the bit including the address of the area recorded in advance.

  Therefore, when the replacement recording operation is not performed in the replacement area desired by the host 20, the microprocessor 16 reproduces the data in the area corresponding to the reproduction area and transmits the reproduced information to the host 20. When the desired data is recorded in another area instead of the reproduction area desired by the host 20, the microprocessor 16 refers to the above-mentioned LOW entry information, and stores the data in the corresponding area indicating the replacement recording area. The reproduced data is transmitted to the host 20.

  As is apparent from the above description, the present invention provides an efficient overwriting method associated with a pre-recorded area of the optical disc, so that the desired data can be written only once (ie BD-R). ), It is possible to record / reproduce more efficiently.

  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. Thus, the present invention is intended to cover modifications and variations of this invention provided that they come within the scope of the appended claims and their equivalents.

A structure of a general BD-RE and a method for managing defects of the BD-RE will be described. A method of recording data on an optical disk (for example, BD-R) that can be written only once will be described. 2 illustrates a method for logically overwriting data on a BD-R according to a first preferred embodiment of the present invention. Fig. 4 illustrates a method for logically overwriting data on a BD-R according to a second preferred embodiment of the present invention. 6 illustrates a method for logically overwriting data on a BD-R according to a third preferred embodiment of the present invention. 7 illustrates a method for logically overwriting data on a BD-R according to a fourth preferred embodiment of the present invention. FIG. 4 is a structural diagram showing continuous recording range information (SRRI) based on a BD-R continuous recording mode (SRM) method according to the present invention. 7 illustrates a method for logically overwriting data in a BD-R according to a fifth preferred embodiment of the present invention. 2 shows a method of recording data in a BD-R according to the present invention. 1 is a block diagram showing an optical recording / reproducing apparatus according to the present invention.

Claims (18)

A method of overwriting data on a recording medium,
a) allocating a plurality of recording areas to the recording medium and recording data of the same category in each recording area;
b) receiving an overwrite command, executing a replacement recording operation at a specific position indicating the nearest writable area, and holding data of the same category in the recording area after execution of the replacement recording operation; A method characterized by comprising:   The method according to claim 1, wherein each of the recording areas indicates a continuous recording range (SRR; Sequential Recording Range).   The replacement recording operation of the data is performed in at least one unrecorded area included in the SRR that receives the overwrite command when an unrecorded area remains in the SRR. The method of claim 2.   The replacement recording operation of the data is completed in the entire area of the unrecorded area. If the unrecorded area remains, the remaining data is stored in the next recordable address (NWA; Next) of the adjacent open SRR. 4. The replacement recording operation of the remaining unrecorded data is performed from the NWA of the adjacent open SRR by recording from (Writeable Address). 5. Method.   When the replacement recording operation is performed in the adjacent open SRR, if the data previously recorded in the open SRR is different from the replacement recording data, the open SRR is changed to a closed SRR, and desired data is changed to the new open SRR. The method of claim 4, further comprising assigning a new open SRR to be recorded in the SRR.   The method according to claim 2, further comprising the step of performing the replacement recording operation in an NWA of a nearby open SRR when the overwrite command is executed in a closed SRR.   When the replacement recording operation is performed in the adjacent open SRR, if the data recorded in advance in the open SRR has the same category as the category of the replacement recording data, the open SRR is changed to a closed SRR, The method of claim 6, further comprising allocating the new open SRR so that the data of the second is recorded in the new open SRR.   The location information of the area that has received the overwrite command and the location information of the replacement recording area are recorded as a single entry in a temporary disk management area (TDMA; Temporary Disc Management Area). The method of claim 1.   The method according to claim 8, wherein the position information recorded in the entry is indicated by a first physical sector number (PSN) of a corresponding area.   3. The method according to claim 2, wherein the information related to the SRR assigned to the recording medium is recorded as SRR information (SRRI: SRR Information) in a temporary disk management area (TDMA).   The method of claim 10, wherein the SRRI includes a header and records the number of the open SRRs in the header.   The method of claim 1, wherein the data is classified into file system data, user data, and file system mirror data. A method of overwriting data on a recording medium,
a) assigning at least one continuous recording range (SRR; Sequential Recording Range) to the recording medium, and recording data in the assigned SRR;
b) receiving an overwrite command related to a pre-recorded area included in the SRR, and executing a replacement recording operation in a writable area included in the SRR;
and c) performing a replacement recording operation in a writable area included in an adjacent SRR if the writable area does not exist in the SRR.   The method of claim 13, wherein the SRR including the writable area for the replacement recording operation indicates an open SRR.   The method of claim 13, wherein each of the SRRs records the same category of data. An apparatus for recording / reproducing data on / from a recording medium,
A plurality of recording areas are allocated to the recording medium, data of the same category is recorded in each recording area, an overwrite command related to the data recording area is received, and replaced at a specific position indicating the nearest writable area A microprocessor that performs a recording operation and retains the same category of data in at least one recording area after the replacement recording operation;
An apparatus comprising: a pickup unit that receives a control signal from the microprocessor and records data on the recording medium according to the received control signal. A recording medium,
A data zone to which a plurality of continuous recording ranges (SRRs) can be assigned;
A management area,
Each of the SRRs assigned to the data zone receives an overwrite command associated with a pre-recorded area included in the SRR, and replaces the pre-recorded area with a writable area included in the SRR. Data can be recorded, and when there is no writable area in the SRR, the data can be recorded in a writable area included in the adjacent SRR;
The management area comprises: a management area for recording management information generated by the overwrite command.   The recording medium according to claim 17, wherein the recording medium is an optical disk that can be written only once, such as a recordable Blu-ray Disc (BD-R).

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