KR101253189B1 - A recording medium, and a method and apparatus for overwriting data in the same - Google Patents

Abstract

In a method of superimposing data on a recording medium, a plurality of recording areas are allocated to the recording medium to record the same type of data for each of the recording areas, and the data is superimposed on the recording area. In the recording command, the replacement recording is performed at the closest recordable position, but the same kind of data is maintained in one recording area even after the replacement recording. In addition, at least one sequential recording range (SRR) is allocated to a recording medium to record data in the allocated SRR, and at the time of an overlapping recording command in the SRR, an area in which data is recorded, the SRR Substitutive recording is performed in the recordable area in the recording medium, and if there is no recordable area in the SRR, the replacement recording is performed in the recordable area in the adjacent SRR.

Disk, defect management, replacement record, nested record

Description

A recording medium, and a method and apparatus for overwriting data in the same}

TECHNICAL FIELD The present invention relates to a recording medium, and more particularly, to a method and apparatus for performing logical overlapping recording when recording data in a recording medium.

Recently, a new recording medium capable of recording and storing high-quality video data and high-quality audio data for a long time, for example, a Blu-ray Disc Rewritable (BD-RE) has been developed.

1 is a diagram showing a structure and a defect management method of a general rewritable optical disc. 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) and an outer spare area (OSA). The ISA is located at the head of the data zone and the OSA is located at the rear of the data zone.

The BD-RE is recorded in a cluster unit which is a predetermined recording unit. In this case, it is detected whether a defect area exists in the data area while data is being recorded.

When the defective area is detected, data to be recorded in the defective area is recorded in the spare area, for example, an inner spare area (ISA), in addition to the position information of the defective area and recorded in the spare area. Position information is recorded in a defect list in the lead-in area as management information.

Therefore, since data to be recorded in the defective area is recorded in the spare area, data recorded in the spare area instead of the defective area can be read / reproduced. It is possible to prevent the occurrence of an unexpected error when data is recorded / reproduced.

On the other hand, the development of a Blu-ray Disc Recordable (BD-R) that can be written once in recent years is in progress. The optical disc that can be recorded once cannot be physically overwritten, unlike the rewritable optical disc, since the entire area of the disc can be physically recorded only once.

However, there may be a case where the recorded data is to be edited or only a part thereof may be modified even on an optical disc that can be written once, and there may be a case where overlapping recording is required for convenience of a user or a host. Accordingly, an efficient way to perform such overlapping recording on the BD-R should be prepared.

It is therefore an object of the present invention to provide a recording medium and a method and apparatus for superimposing data on the recording medium, which substantially prevents one or more problems due to the limitations and disadvantages of the related art.

It is an object of the present invention to provide a method and apparatus for superimposing data on a recording medium.

It is also an object of the present invention to provide a method and apparatus for logically overlapping recording in a write-once recording medium.

It is also an object of the present invention to provide a recording medium to which the method is applicable.

Additional advantages, objects, and features of the present invention will become apparent to those skilled in the art from the following description of the invention in the following description. The objects and other advantages of the present invention may be realized and obtained by the structure specifically pointed out in the accompanying drawings and the claims and the detailed description.

In order to achieve the above objects and other advantages, the recording medium superimposing recording method of the present invention comprises: a) allocating a plurality of recording areas to a recording medium to record the same type of data for each of the recording areas; and b) in case of an overlapping recording request for the recording area in which the data is recorded, performing replacement recording in the closest recordable position, and retaining the same type of data in the recording area even after the replacement recording.

In addition, another recording medium overlapping recording method of the present invention comprises: a) assigning at least one sequential recording range (SRR) to a recording medium to record data in the allocated SRR; and b) in the SRR. When the superimposition recording request for the device recording area is performed, substitute recording is performed in the recordable area in the SRR, and if there is no recordable area in the SRR, the replacement recording is performed in the recordable area in the adjacent SRR. do.

In addition, the recording medium superimposing recording apparatus of the present invention allocates a plurality of recording areas in the recording medium to record the same type of data for each recording area, and requests for superimposed recording on the recording area in which the data is recorded. And performing a replacement recording at the closest recordable position, the microcomputer retaining the same type of data in at least one recording area even after the replacement recording, and receiving a control signal from the microcomputer according to the received control signal. And a pickup unit for recording data on the recording medium.

In addition, the recording medium of the present invention includes a data area capable of allocating a plurality of continuous recording ranges (SRR); And including a management area, wherein each SRR assigned to the data zone allows data to be recorded in a recordable area in the SRR instead of the recorded area when requesting an overlapping recording for the device recorded area in the SRR. If there is no recordable area in the SRR, the data is allocated to be recorded in a recordable area in an adjacent SRR;

In the management area, management information by the superimposition recording request is recorded.

It will be appreciated that the foregoing general description of the invention and the following detailed description are exemplary and explanatory and are intended to provide a subsequent description of the invention as claimed.

The accompanying drawings, which form a part of this specification, while providing a further understanding of the invention, illustrate embodiments of the invention with descriptions that help explain the principles of the invention.

1 illustrates a structure of a general BD-RE and a defect management method of the BD-RE.

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

3 shows a logical overlapping recording method in a BD-R according to a first embodiment of the present invention.

4 shows a logical overlapping recording method in a BD-R according to a second embodiment of the present invention.

5 shows a logical overlapping recording method in a BD-R according to a third embodiment of the present invention.

6 shows a logical overlapping recording method in a BD-R according to a fourth embodiment of the present invention.

FIG. 7 illustrates a structure of sequential recording range information (SRRI) according to a sequential recording mode (SRM) method of a BD-R according to the present invention.

8 shows a logical overlapping recording method in a BD-R according to a fifth embodiment of the present invention.

9 shows a data recording method in a BD-R according to the present invention.

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

Preferred embodiments of the invention will be described in detail below, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In addition, the term used in the present invention was selected a general term that is widely used at present, but according to the emergence of a new technology, the term that the applicant deemed most appropriate in the present invention was arbitrarily used, and the meaning of the term in the corresponding description. It will be explained clearly. Therefore, in the understanding of the present invention, it is intended that the present invention should be grasped by the meaning of terms rather than simple names.

As used herein, " recording medium " means any medium capable of storing data, and includes, for example, an optical disc, a magnetic tape, and the like. For convenience of explanation and the understanding of the present invention, the following description will be given using an optical disc (for example, BD-R) that can be written once.

2 shows a data recording method on an optical disc (for example, BD-R) that can be written 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 in which actual user data is recorded. The inner spare area is located at the beginning of the data zone and the outer spare area is located at the rear end of the data zone.

The lead-in zone is used as an area in which various management information necessary for recording and reproducing data on an optical disc is recorded. In particular, the lead-in zone includes a temporary disc management area (TDMA) in which defect management and recording management information of an optical disc is recorded.

The TDMA is utilized for updating defects and recording management information that can occur frequently during the use of the disc. In addition, additional TDMA (Additional TDMA) may be further allocated in the spare area.

In the write-once optical disc configured as described above, data recording is largely divided into a sequential recording mode (SRM) system and a random recording mode (RRM) system.

In order to facilitate recording of data on the disc, the SRM method divides and records a user data area in which actual user data is recorded into several consecutive areas. The divided area is referred to as "track" or "sequential recording range". In the following, the divided region will be referred to as "SRR".

The usage data recording in the SRR is performed in the unrecorded cluster, which is the next recordable unrecorded cluster. The address of the next recordable unrecorded cluster is referred to as "Next Writable Address" (NWA). That is, the cluster immediately following the recorded area in the SRR becomes the NWA, and recording of data starts in the NWA. Therefore, when data is continuously recorded from a specific position NWA, the NWA dynamically increases in accordance with the recording of the data.

In this case, the SRR having the NWA and in which data can be recorded is referred to as a "reserved SRR" or an "open SRR". Hereinafter, the present invention will be described as an open SRR for convenience of description.

Two or more open SRRs are allocated to record data. One of the open SRRs is used as a file system data area in which information about user data is recorded, and the other SRR is used as a user data area in which user data is recorded.

&Quot; File system data " means information indicating the names of files existing on the disc, the recording position on the disc, and the like, so that the user data file can be easily recorded on or read from the disc. That is, a host or an application uses the file system data to record a specific file on the disk or to play back the recorded file.

Accordingly, the file system data includes information such as name information of a file / directory having a hierarchical structure, a pointer indicating a size / location of the file / directory, and the like.

According to this SRM method, upon receiving a request of an application or a host, there may be a superimposed write command for a recorded area in one SRR. In this case, the recording of the data on the disc-recorded area, i.e., the superimposed recording is not allowed because recording on the disc is possible only once physically due to the characteristics of the writeable optical disc. However, data to be recorded in the recorded area may be recorded in a next writable area (NWA) in a next recordable user data area instead of the recorded area. This is distinguished from the physical overlapping recording of the rewritable disc BD-RE, and is called logical overwriting.

The logical overlapping recording method will now be described in more detail with reference to the accompanying drawings.

3 shows a logical overlapping recording method in a BD-R according to a first embodiment of the present invention.

Referring to Fig. 3, when a recording command of data for a recorded area in one SRR is received, the data to be recorded in the recorded area is the next recordable area instead of the recorded area. Is written on.

More specifically, when the FS data area of SRR # 1 has an NWA and is an open SRR, data is alternatively recorded in the NWA in the SRR. If the user data area of SRR # 2 has an NWA and is an open SRR, data is alternatively recorded in the NWA.

According to the present invention, in an optical disc (for example, BD-R) capable of recording once, if there is a recording command of data for a recorded area, i.e., an overlapping recording command, instead of the recorded area, the superimposed recording Data is written to the NWA closest to the area where the command was received.

Therefore, as shown in Fig. 3, when one SRR has an NWA and is an open SRR, and there is enough space in the SRR to store data for replacement recording, the data is preferentially recorded in the corresponding SRR (i.e., A large write is performed for that SRR). When the replacement recording is performed as described above, first position information of the area where the superimposition recording command of the data is received and second position information of the area where the replacement recording is performed are recorded in a specific area in the disc. For example, the first and second location information are recorded in the disk TDMA as a LOW entry.

The location information may be represented as a first physical sector number (PSN) of the cluster. Preferably, if the logical overlap write has a plurality of cluster sizes, the first physical sector number of the first and last cluster may be written using two entries, respectively.

Therefore, when the user wants to reproduce the data of the first area in which the superimposition recording command is received, the LOW entry recorded in the TDMA is referred to, and instead of the data stored in the first area, the second area in which the replacement recording is performed is performed. The stored data will be played back.

Therefore, even though data to be recorded in the first area receiving the overlapping write command is recorded in the second area, which is physically an alternate area, the actual host does not enter the first area in which the data receives the overlapping write command. It is recognized as being recorded.

In performing such logical overlapping recording, there may occur a case where a replacement record area for performing replacement recording for the logical overlapping recording command is insufficient. This will be described later with reference to FIG. 4.

Specifically, replacement recording by the superimposition write command is performed first in the corresponding SRR. However, if the area necessary for the replacement recording does not exist in the SRR, it is preferable that the replacement recording be performed in another SRR adjacent to the SRR.

4 shows a logical overlapping recording method in a BD-R according to a second embodiment of the present invention.

As shown in Fig. 4, there may be an overlapping write command of data for the recorded area in SRR # 1 in which file system data is recorded. In this case, when the SRR # 1 has an NWA and is an open SRR, the replacement recording is performed to the NWA.

In the case of performing the replacement recording in this manner, a case where the replacement recording area is insufficient to perform the replacement recording may occur.

In this case, the replacement recording is performed as much as the area remaining in the SRR # 1, and the data remaining without the replacement recording is even recorded in the NWA of the adjacent SRR. That is, some data is recorded in the NWA of the SRR # 1, and other data is recorded in the NWA of another SRR adjacent to the SRR # 1. 4 shows an example of an alternative recording performed on SRR # 2.

In this case, SRR # 2 in which the remaining replacement recording is performed may be a user data area. In such a case, it is preferable that the same kind of data is recorded in one SRR. Preferably, the SRR # 2 storing the user data is closed and a new SRR is allocated so that data is written to the new SRR.

For example, the data of the SRR # 1 is file system data. Therefore, when the file system data is recorded in SRR # 2, which is different from the file system data, in which user data is recorded, the SRR # 2 is automatically closed, a new SRR is allocated, and the data is recorded in the new SRR. Will be.

Thus, the SRR # 2 storing the user data is closed, a new SRR # 3 is allocated, and the remaining file system data for logical overlapping recording is recorded in the SRR # 3.

As a result, user data is recorded in the SRR # 2, and file system data is recorded in the new SRR # 3, thereby preventing different types of data from being recorded in one SRR by a logical overlapping write command.

Then, when the user wants to record the user data on the disk again, a new SRR # 4 is assigned to the disk, and the user data is recorded on the SRR # 4.

On the other hand, such logical superposition recording is an operation that occurs in the optical disk drive itself. More specifically, even if the optical disc is actually a BD-R, an application, a host, or the like is not bound to the recorded area of the BD-R, and the BD-R is as if the BD-R is a BD-RE. Can be applied to.

Therefore, when logical overlapping recording is performed, even if the next recordable NWA is changed due to the logical overlapping recording, the application or the host or the like does not know the change.

Therefore, in case the logical overlapping is performed and the NWA is changed in this manner, the file system asks the optical disk drive for the location information of the next writable area (NWA) when the data recording is to be performed. The data recording is performed on the changed NWA corresponding to the location information.

On the other hand, the newly allocated SRRs (SRR # 3 and SRR # 4) is generated by the division of the SRR # 2 for the initially assigned user data.

In the second embodiment of the present invention, when logical overlapping is performed in the SRR in which the file system (FS) data is recorded, the case where the replacement area is not sufficient is taken as an example. However, the file system data is recorded in all areas and closed. It is apparent that the logical overlapping recording may be performed at SRR.

5 shows a logical overlapping recording method in a BD-R according to a third embodiment of the present invention.

As shown in FIG. 5, according to the third embodiment of the present invention, when all file system data areas of SRR # 1 are recorded and closed, there is a command to write new file system data in the closed SRR # 1. Is illustrated.

As described above, when the recording command for the recorded area is in the SRR # 1, the data to be recorded in the recorded area (SRR # 1) is the most in the recorded area instead of the recorded area. Are recorded in the nearest NWA.

Therefore, data is recorded in SRR # 3 including the nearest NWA instead of SRR # 1. In this case, since the SRR # 3 is an area in which file system data is recorded, the same kind of data is recorded, and the data is immediately recorded in the NWA of the SRR # 3 without closing the SRR.

With respect to the disc on which the replacement recording is performed, logical overlapping recording in the SRR in which the user data in which the closed or replacement recording area is insufficient is described will be described with reference to FIG.

6 shows a logical overlapping recording method in a BD-R according to a fourth embodiment of the present invention.

As shown in Fig. 6, when all of the SRR # 2 including the user data has been recorded and closed, or when there is not enough area for the alternative recording in the SRR # 2, a command to write new data in the SRR # 2 This can be delivered.

In this case, the data to be recorded in the SRR # 2 is recorded in the nearest NWA. That is, the data is recorded in the NWA present in SRR # 3 which is the SRR closest to the SRR # 2.

In this case, since the SRR # 3 is an area in which file system data is recorded, as in the above-described embodiment, when logical overlapping recording is performed on the SRR # 3, different types of data units are mixed in the SRR # 3. do. That is, it is preferable that the same type of data is recorded in one SRR, and different types of data exist in one SRR due to the logical overlapping recording.

In order to avoid the above problem, it is preferable that the user data is sequentially recorded. That is, although the logical overlapping recording can be performed for all the areas of the BD-R, general user data by the file system can only be recorded continuously.

The optical disc according to the present invention continuously records including information related to an open SRR in order to prevent different types of data from being recorded in one SRR while smoothly performing logical overlapping recording for a closed SRR in which user data is stored. The "List of Open SRR" field of the SRRI (Seqeuntial Recording Range Information) header is used. This will be described in detail with reference to FIG. 7 as follows.

FIG. 7 illustrates a structure of sequential recording range information (SRRI) according to a sequential recording mode (SRM) scheme in a BD-R according to the present invention, and according to a fifth embodiment of the present invention. The logical overlapping recording method according to an example is shown.

Referring to FIG. 7, sequential recording range information (SRRI) is information recorded in TDMA of an optical disc. The SRRI includes a "List of SRR entries" field and a "SRRI Terminator" field.

The "SRRI header" field includes an "SRRI identifier =" SR "" field as identification information indicating that it is an SRRI. In addition, 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 SRR entries" field, and information indicating the number of open SRRs is recorded in the "number of SRR entries" field. Information representing a list of numbers of open SRRs is recorded.

In the "List of Open SRR numbers" field, information related to a list of open SRR numbers is recorded. As shown in FIG. 7, from the first open SRR number field to the sixteenth open SRR number field, sixteen open SRR number fields are allocated in size of 2 bytes each, and data is recorded in each SRR number field.

In this case, the SRR numbers are allocated in descending order. If the number of allocated SRRs is less than 16, 0 is recorded in the unused open SRR number field. Therefore, the optical disk drive searches for an alternative recordable SRR by referring to the "List of Open SRR numbers" field.

According to the present invention, when the logical overlapping recording is performed in the closed SRR using the SRRI header information described above, the logical overlapping recording is performed so that different types of data do not exist in one SRR. This will be described with reference to FIG. 8 as follows.

8 shows a logical overlapping recording method in a BD-R according to a fifth embodiment of the present invention.

Referring to FIG. 8, when an optical disc drive is to be written to a device or to perform logical overlapping recording of a closed SRR due to a user's request, the NWA of the open SRR corresponding to the remainder obtained by dividing the number of the closed SRRs by the number of open SRRs. Then, the replacement record is performed.

For example, as shown in FIG. 8, the closed SRR is 0, 1, 2, and 3 SRRs (ie, SRR 0, SRR 1, SRR 2, and SRR3), and file system data is stored in the closed SRR 0 and SRR 2. Assume that recorded and user data has been recorded in the closed SRR 1 and SRR 3. When the open SRR is SRR 4 and 5, the "List of Open SRR numbers" field stores "List of Open SRR [0] = 4" information and "List of Open SRR [1] = 5" information.

In this case, the letters in parentheses of the "List of Open SRR" information indicate that the 0 open SRR and the 1st open SRR are allocated because there are two allocated open SRRs.

In such a recording state, when the optical disk drive attempts to logically write to the closed SRR 0 at the request of the host or application, the number of open SRRs is two, so the remainder of the closed SRR number 0 divided by 2 Is calculated.

Since the calculated remainder is 0, the replacement recording for the logical overlapping recording is performed on the NWA of the 0th open SRR, that is, the open SRR 4 having the open SRR number 4. In this case, since the closed SRR 0 is the SRR in which the file system data is recorded, the file system data is also recorded in the open SRR 4 in which the replacement recording is performed.

When a logical overlapping write command is delivered for closed SRR 1, the remainder obtained by dividing the closed SRR number 1 by the number of open SRRs is calculated. Since the calculated remainder is 1, a replacement recording for the logical overlapping recording is performed on the NWA of the first open SRR, that is, the open SRR 5 having the open SRR number 5. FIG. In this case, since the closed SRR 1 is the SRR in which the user data is recorded, the open SRR 5 in which the replacement recording is performed is also recorded in the user data.

In the same way, if the optical disk drive wants to perform a logical overlap write to the closed SRR 2, a replacement write is performed to the open SRR 4. The open SRR 4 is an SRR in which file system data is recorded. Even if an alternative recording of logical overlapping recording for closed SRR 2 in which file system data is recorded is performed, different types of data do not exist in the same SRR.

When the optical disk drive attempts to perform a logical overlapping write on the closed SRR 3, a replacement write is performed on the open SRR 5, and since the open SRR 5 and the closed SRR 3 are both areas in which user data is recorded, the same type of data is stored. It can exist in one SRR.

Referring to Fig. 9, a data recording method in a BD-R according to the present invention will be described.

9 shows a data recording method in a BD-R according to the present invention. Referring to the figure, the BD-R includes a lead-in zone, a data area, and a lead-out zone. Two or more SRRs are allocated to the data zone and recorded.

In this case, in Fig. 9, three SRRs (SRRs 1 to 3) are allocated to the data zone at the same time. The first SRR contains file system data, the second SRR contains user data, and the third SRR contains file system mirror data, the same data as the file system data. Is recorded.

The file system mirror data is the same data as the file system, and is recorded to more firmly store the file system data having an important meaning.

When logical overlapping recording is performed even when three SRRs are divided and data is recorded as described above, it will be apparent that the logical overlapping recording may be performed so that different types of data do not exist in one SRR.

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 device 10 and a host or control unit 20 controlling the recording / reproducing unit. The recording / reproducing section 10 is also often referred to as an optical disc drive, and it is noted that the recording / reproducing section 10 is used interchangeably with the optical disc drive in this specification.

According to the optical recording / reproducing apparatus configured as described above, the host 20 issues a recording or reproducing command to a specific area of the optical disc to the recording / reproducing section 10, and the recording / reproducing section 10 transmits the host. The recording / reproducing operation is performed in accordance with the instruction of (20).

In this case, the recording / reproducing section 10 includes an interface section 12, a pickup section 11, a data processor 13, a memory 15, and a microcomputer 16. The interface unit 12 performs communication such as exchanging data and commands with the host 20. The pickup section 11 directly records data on or reproduces data from the optical disk. The data processor 13 restores a signal read from the pickup unit 11 to a desired signal value, or modulates and transmits a signal to be recorded into a signal recorded on an optical disc. The servo unit 14 controls the pickup unit 11 to accurately read a signal from the optical disc or to accurately record a signal on the optical disc. The memory 15 temporarily stores various information and data including management information. The microcomputer 16 controls the mutual operation of the components in the recording / reproducing unit 10.

A method of recording data in a BD-R using the optical recording / reproducing apparatus according to the present invention configured as described above is as follows.

When an optical disc (e.g., BD-R) is inserted into the optical recording / reproducing apparatus, all management information is read out from the BD-R and stored in the memory 15, and these management information are utilized in recording and reproducing the optical disc. .

In this case, when a user issues a recording command for recording in a specific area of the optical disc, the host 20 receives the recording command from the user to record / reproduce location information requiring recording and data to be recorded. Transfer to section 10.

In this case, the microcomputer 16 in the recording / reproducing section 10 receives the recording command and records data on the optical disc in accordance with the recording command.

When data is recorded on the optical disc, when superimposed recording is to be performed, the data to be recorded in the superimposed recording area is next writable area (NWA) of the user data area using various embodiments of the present invention. Is recorded in the TDMA as a LOW entry.

To this end, the microcomputer 16 in the recording / reproducing section 10 transfers the positional information and data of the alternative recording area to the servo section 14 and the data-processor 13 through the pick-up section 11. Allow recording or replacement recording to be completed at the desired location on the disc.

A method of reproducing data from a write once optical disc (for example, BD-R) is as follows.

When the BD-R is inserted into 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 these management information are utilized during recording / reproducing of the optical disc. do.

In this case, when a user issues a playback command for a player to play data in a specific area of the optical disc, the host 20 receives the playback command from the user and records the position information to be played back. To pass).

The microcomputer 16 in the recording / reproducing section 10 receives the reproduction command, and an area in the optical disc that the host 20 wants to reproduce from the management information stored in the memory 15 is different from the data zone. Replaced with an area, it is determined whether or not desired data has been recorded in the replaced area. That is, the microcomputer 16 can check whether there is a substitute recording by referring to the LOW entry information recorded in the above-described TDMA.

The microcomputer 16 may check necessary information by referring to a status bit recorded in a flag bit in an address unit of the replacement recording area, or a bit in which an address of a previously recorded area is recorded.

Therefore, when the replacement recording is not performed in the region where the host 20 wants to reproduce, the microcomputer 16 reproduces the region and transmits the reproduced information to the host 20. If desired data is recorded in another area instead of the area that the host 20 wants to reproduce, the data of the corresponding replacement recording area is reproduced and transmitted to the host 20 with reference to the LOW entry information described above.

The above-described superimposed recording method of an optical disc of write once type according to the present invention provides an efficient superimposition recording method for the recorded area in the optical disc, thereby making it possible to make an optical disc (e.g. BD-R) capable of recording once more efficiently. It is effective to record management.

Embodiments of the present invention described above, those skilled in the art, within the spirit and scope of the present invention disclosed in the appended claims, it is apparent that other various embodiments can be improved, changed, replaced or added, etc. something to do. Therefore, it is obvious that the present invention includes the improvements and modifications of the present invention within the scope of claims and equivalents.

Claims (18)

A method of superimposing data in a recording medium including an inner area, a data area, and an outer area, wherein the data area includes a user data area and a spare area. Dividing the user data area into a plurality of sequential recording ranges (SRR) and recording data in at least one of the plurality of sequential recording ranges; And In a recording command requesting data to be recorded in a closed continuous recording range (closed SRR), an open continuous recording range (SRRs) recorded in a temporary disc management area (TDMA) of the recording medium. Performing a substitute recording in the next recordable area of the opened SRR with reference to the list; The plurality of continuous recording ranges may include one or more open SRRs having a next recordable address (NWA) and one or more closed SRRs having no next recordable address. Nested recording method comprising a. The method of claim 1, And after the replacement recording is performed in the open continuous recording range, if unsubstituted data remains, the non-replaced data is recorded in the next recordable area of another open continuous recording range. The method of claim 2, If the data recorded in the other open continuous recording range is different from the remaining non-replaced data, the other open continuous recording range is closed to change to the closed continuous recording range, and the new open continuous recording range is closed. And overwriting the remaining unsubstituted data. The method of claim 1, And recording the positional information of the area indicated by the recording command and the positional information of the replacement recording area replacing the area as one entry in the temporary disk management area. The method of claim 1, An overlapping recording method for recording the same kind of data in each of the plurality of continuous recording ranges. A recording apparatus including an inner area, a data area and an outer area, the data area recording data on a recording medium including a user data area and a spare area, A pickup unit for recording data in the recording medium; And Controlling the pickup unit to divide the user data area into a plurality of sequential recording ranges (SRR), to record data in at least one of the plurality of sequential recording ranges, In a recording command requesting data to be recorded in a closed continuous recording range (closed SRR), an open continuous recording range (SRRs) recorded in a temporary disc management area (TDMA) of the recording medium. A microcomputer for performing replacement recording in the next recordable area of the opened continuous recording range (Referred to SRR), with reference to the list; The plurality of continuous recording ranges may include one or more open SRRs having a next recordable address (NWA) and one or more closed SRRs having no next recordable address. Recording apparatus comprising a. The method of claim 6, The microcomputer controls the pick-up unit to control the pick-up unit, and even after the replacement recording is performed in the open continuous recording range, if the data is not replaced, the non-replaced data is in the next recordable area of the other open continuous recording range. Recording apparatus, characterized in that for alternative recording. The method of claim 7, wherein The microcomputer controls the pickup unit when the data recorded in the other open continuous recording range is different from the remaining non-replaced data, and closes the other open continuous recording range to the closed continuous recording range. Record the remaining unreplaced data by changing and allocating a new open continuous recording range. The method of claim 6, The microcomputer controls the pickup unit to record the position information of the area indicated by the recording command and the positional information of the replacement recording area replacing the area as one entry in the temporary disk management area. Characterized in that the recording device. The method of claim 6, And recording data of the same kind in each of the plurality of continuous recording ranges. An inner area and an outer area; A data area including a user data area and a spare area; And A temporary disc management area (TDMA) included in at least one of the inner area and the data area, The user data area is divided into a plurality of sequential recording ranges (SRR), The plurality of continuous write ranges may include one or more closed SRRs that do not have a Next Writable Address (NWA) and one or more closed SRRs that do not have a next writable address. ),  In a recording command requesting data to be recorded within the closed continuous recording range, by referring to a list of opened SRRs in the temporary disc management area, within the next recordable area of the opened continuous recording range. A recording medium, characterized in that data is alternatively recorded. The method of claim 11, Recording data is recorded in the next recordable area of another open continuous recording range, even after the replacement recording is performed in the open continuous recording range. 13. The method of claim 12, If the data recorded in the other open continuous recording range is different from the remaining non-replaced data, the other open continuous recording range is closed to change to the closed continuous recording range, and the new open continuous recording range is closed. Recording medium for recording the remaining unreplaced data. The method of claim 11, A recording medium for recording the positional information of the area indicated by the recording command and the positional information of the replacement recording area replacing the area as one entry in the temporary disk management area. The method of claim 11, Recording medium in which the same kind of data is recorded in each of the plurality of continuous recording ranges. delete delete delete

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