KR100694046B1 - Apparatus and method for data recording in write- once disc, apparatus and method for data reproducing in write- once disc, and writ-once disc therefor - Google Patents

Abstract

Disclosed are a data recording apparatus, a method thereof, a data reproducing apparatus, a method thereof and a recording disc once on a recording disc. A write once disc according to the present invention comprises: a write once disc having at least one recording layer, comprising: a plurality of update areas in which predetermined information to be updated is recorded; And an access information area in which access information indicating an update area in which information finally updated is recorded is recorded among the plurality of update areas. According to the present invention, an access time for reading the updated information can be shortened more in the case of a recording disc once the predetermined information is updated and recorded in a new location. In particular, when there are a plurality of update areas for recording the updated information necessary for the use of the recording disc once, the recording device or the reproduction device quickly selects the update area in which the finally updated information is recorded among the plurality of update areas. Can be easily and easily determined.

Description

Apparatus and method for data recording in write- once disc, apparatus and method for data reproducing in write- once disc, and writ- once disc therefor}

1 is a diagram showing the structure of a write once disc according to an embodiment of the present invention;

2 is a diagram showing a more detailed structure of a single recording layer write once disc according to an embodiment of the present invention;

3 is a view showing a more detailed structure of a dual recording layer write once disc according to an embodiment of the present invention;

4 is a diagram showing a more detailed structure of a dual recording layer write once disc according to another embodiment of the present invention;

5 is a diagram for describing a process of recording data in a user data area and a spare area according to one embodiment of the present invention;

6 is a diagram showing a data structure of access information according to a first embodiment of the present invention;

7 is a diagram showing a data structure of access information according to a second embodiment of the present invention;

8 is a diagram showing a data structure of access information according to a third embodiment of the present invention;

9 is a diagram showing a data structure of access information according to a fourth embodiment of the present invention;

10 is a diagram illustrating a case where an entire TDMA is divided into a plurality of virtual TDMAs;

11 is a block diagram of a recording apparatus according to an embodiment of the present invention;

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of recording information on a write once disc or reproducing recorded information. More particularly, the present invention relates to an access for faster access to information necessary for use of a write disc. An apparatus for recording information on a recording disc once, a method thereof, and a recording disc once.

In the case of a rewritable disc, new information can be overwritten on a portion where information has already been recorded. However, in the case of the recording disc, once the information is recorded, it cannot be erased and written again. Therefore, in order to update the already recorded information, a new location must be allocated and recorded.

In fact, most of the information that is updated is only meaningful when the information is finally updated. Thus, an update area is allocated to the data area, and the disk drive searches for an area in which the updated information is recorded to find the last updated information in order to read the last updated information. Moreover, if a lot of information is recorded in the area to be searched, it takes a long time to obtain the desired information.

On the other hand, in the case of the write-once disc for which defect management by the drive is implemented, areas for recording the defect management information about the defects occurring during the use of the write-once disc and information indicating the recording status of the write-once disc are provided. . Once an update such as information on defect management is required due to the characteristics of the recording medium, the updated information cannot be overwritten in the same location where the existing information is recorded, as in a rewritable disc. Since information must be recorded, a relatively wide update area is required. In general, the update area is allocated to the lead-in area or the lead-out area, but sometimes may be allocated to the data area according to the user's selection in order to increase the number of updates.

The final update information necessary for the use of the recording disc once is recorded in the update area assigned to the data area, and the final update information includes information indicating that the update area is allocated to the data area and the location information of the update area. In this case, even if the drive searches for all of the update areas provided in the lead-in area or the lead-out area, the drive cannot obtain the last updated information, and there is a problem in not knowing where the last updated information is recorded.

Accordingly, a technical object of the present invention is to provide a write once disc in which information is recorded in a data structure that can shorten the access time for reading updated information necessary for use of the write once disc.

Another technical problem to be achieved by the present invention is to provide a data recording method and apparatus capable of shortening an access time for reading updated information necessary for use of a recording disc once.

Another object of the present invention is to provide a data reproducing method and apparatus for shortening the access time for reading updated information necessary for use of a recording disc once.

According to the present invention, there is provided a recording medium having at least one recording layer, comprising: a plurality of update areas in which predetermined information to be updated is recorded; And an access information area in which access information indicating an update area in which information finally updated is recorded is recorded among the plurality of update areas.

According to an aspect of the present invention, there is provided a data recording method on a recording disc once, the method comprising: recording predetermined information updated in one of a plurality of update areas provided on the disk; And recording access information indicative of an update area in which information finally updated among the plurality of update areas is recorded, in the access information area provided in at least one of the disks.

According to another aspect of the present invention, a data recording apparatus on a write once disk, comprising: a recording / reading unit for recording or reading information on the disk; And access information provided in the disc with at least one access information for recording predetermined information to be updated in one of a plurality of update areas provided in the disc, and indicating an update area in which information finally updated among the plurality of update areas is recorded. It is also achieved by an apparatus comprising a control unit for controlling the recording / reading unit to record in an information area.

According to another aspect of the present invention, there is provided a method for reproducing a recording disc once, the method comprising: obtaining finally updated access information in an access information area provided on at least one recording disc; And obtaining, from the access information, information on an update area in which information finally updated is recorded among a plurality of update areas provided on the disc.

According to another aspect of the present invention, there is provided a reproducing apparatus of a write once disc, comprising: a reading unit for reading data recorded on the once recording disc; And controlling the readout unit to obtain finally updated access information in at least one access information area provided on the recording disc, and from the access information, the last updated information is recorded from among the plurality of update areas provided on the disc. It is achieved by the device characterized in that it comprises a control unit for obtaining information about the updated update area.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a view showing the structure of a write once disc according to an embodiment of the present invention, in which FIG. 1 (a) shows the structure of a single recording layer and FIG. 1 (b) shows a double recording layer. It is a figure which shows the structure of a recording disc once.

In the single recording layer write once disc shown in Fig. 1A, a lead-in area, a data area and a lead-out area are sequentially provided from the inner circumference to the outer circumferential direction.

In the first recording layer L0 and the second recording layer L1 of the dual recording layer once recording disc shown in FIG. 1B, the inner area, the data area and the outer area are arranged from the inner circumference to the outer circumferential direction. Are sequentially provided.

Fig. 2 is a diagram showing a more detailed structure of a single recording layer once recording disc according to an embodiment of the present invention. Referring to FIG. 2, the lead-in area includes a first disc management area (DMA1), a second disc management area (DMA2), and a first temporary disc management area (TDMA1). Management Area 1), an Access Information Area (AIA), a Recording Condition Test Area (AIA), and the like are provided. In the lead-out area, a third disk management area DMA3, a fourth disk management area DMA4, and the like are provided. Furthermore, at least one of a temporary defect management area, a recording condition test area, or an access information area may be further provided in the lead-out area. In summary, the access information area, the disc management area, the temporary disc management area, and the recording condition test area may respectively exist in at least one of the lead-in area or the lead-out area.

3 is a view showing a more detailed structure of a dual recording layer write once disc according to an embodiment of the present invention, in which FIG. 3A shows the structure of the recording layer L0 and FIG. 3B shows the recording. It is a figure which shows the structure of the layer L1. The structure of the recording layer L0 shown in Fig. 3A is the same as that of the single recording layer single-recording disc shown in Fig. 2. The structure of the recording layer L1 shown in Fig. 3B is similar to that of the recording layer L0, but the access information area is not provided in the second inner area, and the temporary data management area is provided in the second data area. There is a difference.

In addition, in the write once disc according to the present embodiment, five TDMAs of TDMA 1 to TDMA 5 are provided. The position and size of TDMA 1 and TDMA 2 are areas known to the recording device and / or reproducing device. However, TDMA 3, TDMA 4 and TDMA 5 are once assigned to the data area by the user or the recording device and / or the reproduction device at the time of disc initialization for use of the recording disc. When the TDMS is recorded from the TDMA 1, the TDDS including the size and position information of the TDMA allocated to the data area is recorded in the TDMA 1.

4 is a diagram showing a more detailed structure of a dual recording layer write once disc according to another embodiment of the present invention, where FIG. 4 (a) shows the structure of the recording layer L0 and FIG. 4 (b) shows the recording. It is a figure which shows the structure of the layer L1. TDMA 1, TDMA 2, and TDMA 4 are allocated to the dual recording layer write once disc shown in FIG. That is, the double recording layer write once disc shown in Fig. 4 represents a write once disc in which only TDMA 4 is allocated to data area 2 by a user or a recording device and / or a reproducing device at the time of disc initialization for use of the disc.

Hereinafter, the process of recording data in each area and each area such as a temporary disc management area provided in the recording disc once will be described.

The temporary disk management area (TDMA) is an area for recording temporary management information (TDMS) for management of a recording disk once before finalization of the recording disk. The finalizing of the recording disc once means an operation that no more data can be recorded on the recording disc once. When the user no longer records data on the recording disk once or when additional data cannot be recorded once, the recording disk is finalized.

The temporary management information includes temporary defect information (TDFL), temporary defect management information (TDDS), and a space bit map (SBM). The temporary defect information (TDFL) is composed of information indicating where the defect is generated and information indicating where the newly replaced area is. The temporary defect management information (TDDS) is information for managing the temporary defect information, and includes a location pointer indicating a location where corresponding temporary defect information is recorded, a location pointer indicating a location where a corresponding space bitmap is recorded, and a data area. Location and size information of spare areas allocated within the data area, and location and size information of temporary disk management areas allocated within the data area. The space bit map (SBM) is information representing a data recording state of a recording disk as a bit map by assigning different bit values to clusters in which data is recorded and clusters in which data is recorded in cluster units which are data recording units.

Once the recording disc is loaded into the recording apparatus and / or the reproduction apparatus, the apparatus is required to quickly obtain the finally updated temporary management information, in particular the temporary defect management information (TDDS), for use of the disk.

Typically, the recording and / or reproducing apparatus reads the information in the lead-in area and / or the lead-out area when the disc is loaded into the device to figure out how to manage the disc and how to record or reproduce it. The larger the amount of information recorded in the lead-in area and / or the lead-out area, the longer the time required for loading the disc and then preparing for recording or playback occurs. Therefore, the above-described concept of temporary management information is introduced and the temporary management information generated during data recording or reproduction on the disc is recorded in the temporary disc management area provided in the lead-in area and / or the lead-out area separately from the defect management area. .

When finalizing the recording disk once, the temporary management information recorded so far, namely, the temporary defect information and the temporary defect management information, is finally recorded in the disk management area (DMA). When a disc is finalized, this means that only the last meaningful information, which has been updated and recorded several times, is finally transferred to the disc management area, so that the recording or reproducing apparatus can finally obtain meaningful information from the future defect management area. This is because there is an advantage that the information can be accessed for the use of the recording disc more quickly by only reading it.

5 is a diagram for describing a process of recording data in a user data area and a spare area according to an embodiment of the present invention.

Referring to FIG. 5, A means a user data area, and B means a spare area. The method of recording the user data in the user data area is by a continuous recording mode or a random recording mode. In the continuous recording mode, the user data is sequentially recorded in succession, and the random recording mode is not necessarily continuous but in random recording. ① to ⑦ respectively indicate a unit in which a verification operation is performed after recording.

The recording device records the user data by the interval ① and then returns to the first part of the interval ① to check whether the data is recorded correctly or whether a defect has occurred. If a part where a defect occurs is found, the part is designated as a defect area. Thus, defect # 1, which is a defect area, is designated. The recording apparatus also records the data recorded in the defect # 1 again in the spare area. The part where the data recorded in the defect # 1 is rewritten is called replacement # 1. Next, the recording apparatus records the user data for the interval ② and then returns to the first part of the interval ② again to check whether the data is properly recorded or whether a defect has occurred. If a defective part is found, that part is designated as defect # 2. In a similar manner, replacement # 2 corresponding to defect # 2 is generated. In addition, defect # 3 and replacement # 3, which are defective areas, are generated in the section ③. In section ④, no defective part is found and there is no defective area.

After recording and verifying up to section ④, and when the end of recording operation # 1 is predicted (when the user presses the eject button or the recording of the user data assigned to the recording operation is completed), the recording device is the temporary defect information # 1 as the sections ① to ④. Information about defects # 1, # 2, and # 3, which are defective areas generated in the above, is recorded in the temporary disk management area. In addition, management information for managing the temporary defect information # 1 is recorded in the temporary disk management area as the temporary defect management information # 1. In the present embodiment, a recording operation is a unit of work determined by a user's intention, a recording operation to be performed, and the like. In this embodiment, a recording disk is loaded into the recording apparatus once, and recording operation of predetermined information is performed. Indicates until unloading from the recording device.

When the recording disc is loaded once again, recording operation # 2 is started, the recording condition is tested in the recording condition test area, and data is recorded based on the result. That is, in the recording operation # 2, data is recorded in the same manner as in the case of the recording operation # 1 described above until the sections ⑤ to ⑦, and defects # 4, # 5 and replacements # 4, # 5 are generated. When the recording operation # 2 ends, the recording apparatus records the information regarding the defects # 4 and # 5 as the temporary defect information # 2. Furthermore, the defect management information # 2 for managing the temporary defect information # 2 is recorded in the temporary disk management area.

As shown in Figs. 2 to 4, when a plurality of temporary disc management areas and spare areas are provided on a recording disc once, a temporary disc management area or a spare area is used in a predetermined order. For example, the data recording path applied to the dual recording layer disc shown in FIG. 3 is from the first inner region of the recording layer L0 to the first outer region, followed by the second inner region of the recording layer L1 in the second outer region of the recording layer L1. In the case of OTP (Opposite Track Path) for recording data into the area, data is recorded from the spare area 1 of the recording layer L0 in the spare area. When all spare areas 1 are used, they are next used in the order of spare areas 2, 3, and 4.

Similarly, temporary management information is recorded from TDMA1 of the recording layer L0. When all of TDMA1 is used, temporary management information to be updated is recorded in TDMA2 provided in the second inner region of the recording layer L1. If both TDMA2 are also used, temporary management information to be updated is recorded in TDMA3 provided in the first data area of the recording layer LO. In this embodiment, TDMA1 and TDMA2 provided in the inner region of each recording layer are essentially provided in one recording disc according to this embodiment. However, the TDMA provided in the data area is an area which may or may not be allocated according to a user's selection. Therefore, the temporary management information is recorded from the TDMA provided in the inner region of each recording layer. If all of the TDMAs provided in the inner area of each recording layer are recorded, the TDMAs assigned to the data area are used.

When the finally updated temporary management information is recorded in the TDMA allocated to the data area, and once the recording disk is unloaded from the recording apparatus and then the disk is loaded into the recording apparatus, the recording apparatus is used for use of the disk. Finally, updated temporary management information should be obtained. However, there is a problem that the temporary management information is recorded in the TDMA allocated to the data area, and the drive cannot know that the TDMA has been allocated to the data area until the drive accesses the temporary defect management information (TDDS) in the temporary management information.

Therefore, in order to solve this problem, the present invention provides the access information area AIA once in a predetermined position on the recording disc. Access information is recorded in the access information area. The access information is information indicating a location where update information such as temporary management information is recorded.

In addition, update information refers to information that the recording and / or reproducing apparatus should recognize for the use of the recording disk once at the beginning when the disc is loaded into the recording and / or reproducing apparatus. The area in which the update information is recorded is called an update area. In this embodiment, the representative update information includes temporary management information, and the typical update area includes TDMA.

As shown in Figs. 2 to 4, the access information area is preferably provided at a predetermined position of the lead-in area or the inner area. In addition, it is preferable to limit the size of the access information area by minimizing the amount of update information and the number of updates recorded in the access information area. This is because when the size of the access information area becomes large or when a plurality of access information areas are allocated, the time required for obtaining access information becomes long.

6 is a diagram illustrating a data structure of access information (AI) according to the first embodiment of the present invention. The access information shown in FIG. 6 shows temporary management information (TDMS) as update information, TDMA as update area, and access information in the case of the dual recording layer write once disc shown in FIG.                     

Referring back to FIG. 6, the header of the access information includes an AI identifier indicating access information and an AI update count indicating how many updated access information is present.

The access information includes the total number of TDMAs provided on the disk, information indicating the TDMA in which the final TDDS is recorded, and location information of each TDMA. The location information of each TDMA may be represented by start and end location information, start or end location, and size information of each TDMA. As described above, the temporary defect management information TDDS includes a pointer indicating the position of the corresponding temporary defect information and the like, so that the access information includes information indicating the TDMA in which the final TDDS is recorded.

Once a recording disc according to the present invention is loaded into the drive, the drive can access the access information area of which the location is already known and finally obtain the updated access information so that the final TDDS can be known and the final TDDS You can get information. In order to minimize the access time for obtaining the final access information recorded in the access information area, it is desirable to continuously record the access information in the access information area according to the continuous recording mode and to minimize the number of update of the access information.

In this embodiment, in order to minimize the number of updates of access information, the access information is updated when the TDMA in which the final TDDS is recorded is changed. In addition, when the access information includes the number information of the TDMAs allocated to the disk and the location information of each TDMA, the access information is updated even when a new TDMA is allocated or the location information of the TDMA is changed. In addition, it is preferable to repeatedly record the same access information in case an error occurs in the recorded access information.

Even if the specific address information in which the final TDDS is recorded is not included in the access information, the access information to be updated is recorded continuously after the previous access information, so that the recording device and / or the playback device record using a method such as track jump. By recognizing the boundary between the recorded and unrecorded areas, it is possible to quickly find the location where the final TDDS is recorded. This is because there is a difference between an RF signal obtained from an area where data is recorded and an RF signal obtained from an area where no data is recorded.

7 is a diagram illustrating a data structure of access information according to a second embodiment of the present invention. The access information according to the embodiment shown in FIG. 6 records the location information of all TDMAs and includes information indicating the TDMA in which the final TDDS is recorded. However, the access information according to the present embodiment includes the location information of the TDMA in which the final TDDS is recorded. The location information of the TDMA in which the final TDDS is recorded may be represented by the address of the first physical sector of the first cluster and the first physical sector of the last cluster of the TDMA. However, the present invention is not limited thereto, and the final TDDS may indicate location information of the recorded TDMA using various methods.

8 is a diagram illustrating a data structure of access information according to a third embodiment of the present invention. The access information according to this embodiment is the same as the data structure of the TDDS. In other words, TDDS is used as access information without defining a data structure of access information. In order to use the TDDS as access information, as shown in FIG. 8, an information field indicating the position of the TDMA in which the final TDDS is recorded must be added to the TDDS.

9 is a diagram illustrating a data structure of access information according to a fourth embodiment of the present invention. The access information according to the present embodiment uses the data structure of the TDDS as it is, as in the above-described third embodiment. However, unlike the third embodiment, the TDDS further includes a flag indicating the TDMA in which the final TDDS is recorded. In this embodiment, the flag consists of a total of eight bits of five bits of b0 to b4 indicating the TDMA in which the final TDDS is recorded and three bits of reserved b5 to b7. For example, the final TDDS is written to TDMA 1 if b0 to b4 is "00001b", to TDMA 2 if "00010b", to TDMA 3 if "00100b", to TDMA 4 if "01000b", and to TDMA 5 if "10000b". It can be defined as indicating that it is.

The plurality of TDMAs provided on the recording disc once according to this embodiment are used continuously based on the data recording direction. Therefore, a plurality of physical TDMAs can be regarded as one continuous TDMA and divided into a plurality of virtual TDMAs.

10 is a diagram illustrating a case where an entire TDMA is divided into a plurality of virtual TDMAs. For example, in the case of the double recording layer write once disc shown in FIG. 3, TDMA 1, TDMA 2, TDMA 3, TDMA 4, and TDMA 5 are used in the order of TDMA 1 and TDMA 2 in 2048 clusters, TDMA 3, and TDMA 4 If TDMA consists of 4096 clusters and TDMA 5 consists of 8192 clusters, then the total TDMA consists of 20480 clusters. If the total TDMA is divided into 512 cluster units, 1024 cluster units, and 2048 cluster units, the TDMAs may be divided into 40, 20, and 10 virtual TDMAs, respectively.                     

If the size of TDMA 3 among the TDMA 1 to TDMA 5 allocated to the dual recording layer once is very large and the final TDDS is recorded in the TDMA 3, the recording and / or reproducing apparatus obtains the final TDDS from the access information. Knowing that it has been written, the TDMA 3 is searched to get the final TDDS. However, when the size of the region of TDMA 3 is large, a problem may occur in that it takes a long time to search for TDMA 3 to obtain a final TDDS. Therefore, to solve this problem, a virtual TDMA concept as described above is used. As shown in FIG. 10, the size of each virtual TDMA may be the same, but is not limited thereto.

The recording and / or reproducing apparatus divides the entire TDMA into a plurality of virtual TDMAs and updates the access information only when the virtual TDMA to which the final TDDS is recorded is changed. The data structure of the access information according to the present embodiment may use the data structure according to the first to fourth embodiments described above. However, the access information includes information indicating the virtual TDMA in which the final TDDS is recorded or the location information of the virtual TDMA.

11 is a block diagram of a recording apparatus according to an embodiment of the present invention.

Referring to FIG. 11, the recording apparatus includes a recording / reading unit 1, a control unit 2, and a memory unit 3. The recording / reading section 1 records data on the recording disc 100 once, and reads back the recorded data to verify whether or not a defect exists in the recorded data. The write once disc 100 is a write once disc provided with an access information area according to the present invention as described above.

For the defect management, the controller 2 records data in predetermined units and then verifies the "verify after write method" in which the defective portion is found by verifying the recorded data. The control unit 2 records user data in units of one recording operation, and then verifies by checking where a defect area occurs, generates defect information indicating where the defect area is found as a result of the inspection, and then stores the generated defect information in the memory unit. The temporary defect management information, which is stored in (3) and collected in a predetermined amount, is recorded in the update area provided on the disk 100 as temporary defect information, that is, the temporary disk management area, and the recorded temporary defect information is added to the temporary disk management area. Record it. The verification operation after recording during one recording operation is performed at least once, usually a plurality of times. The defect information obtained as a result of performing the verification operation after recording is temporarily stored in the memory unit 3 as temporary defect information. When the recording operation is finished, the control unit 2 reads the temporary defect information stored in the memory unit 3 and provides it to the recording / reading unit 1 and records the information in the temporary disc management area provided in the disc 100. Command

If the data can no longer be recorded on the disk 100 or if the user no longer wants to record the data in the data area (finalizing), the control unit 2 records a temporary defect recorded in the temporary disk management area. The information and the temporary defect management information are recorded in the disc management area provided in the disc 100.

The control unit 2 controls the recording / reading unit 1 to record data in the data structure according to the present invention. That is, predetermined information updated in one of the plurality of update areas provided in the disk 100, namely, temporary management information including temporary defect information or temporary defect management information is recorded, and when the need for updating of access information occurs, the disk is recorded. The recording / reading unit 1 is controlled to record the updated access information in the access information area provided in the 100.

The access information recording method according to the present invention will be described in more detail based on the structure of the recording apparatus described above.

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

Once the recording disk 100 is loaded into the recording apparatus, the control section 2 controls the recording / reading section 1 to record the predetermined user data on the recording disk 100 once (step 71).

 In operation 73, it is determined whether information to be updated has occurred as a result of performing the "verify after recording" operation performed at least once during one recording operation. In the present embodiment, information to be updated means temporary management information. When temporary management information is generated, it is temporarily stored in the memory unit 3, and when the recording operation is completed, the control unit 2 reads the temporary defect information stored in the memory unit 3 and provides it to the recording / reading unit 1, The recording / reading section 1 records this information in one of the plurality of update areas provided in the disc 100 (step 75). The update area according to the present embodiment means TDMA.

The controller 2 determines whether there are other recording operation commands (step 77), and repeats steps 71 to 75 if there are other recording operation commands.                     

However, if there is no other recording operation command, the controller 2 determines whether there is a need to update the access information according to the present invention (step 79). In this embodiment, the access information is updated when the final TDMS, especially when the TDMA in which the final TDDS is recorded, is changed, when a new TDMA is allocated, or when the location information of the existing TDMA is changed.

The control unit 2 controls the recording / reading unit 1 to provide at least one access information area on the recording disc 100 that provides access information indicating an update area in which information finally updated is recorded among the plurality of update areas. (Step 81). It is preferable to repeatedly record the same access information in case an error occurs in the recorded access information.

As described above, if the access information indicating the position where the final TDMS information is recorded is recorded in the access information area of the recording disc once, when the recording disc is loaded again into the recording apparatus or the reproducing apparatus, the final TDDS information is added to the final TDDS information. More quickly and easily.

On the other hand, although not shown in a separate drawing, the reproducing apparatus of the recording disc 100 once including the access information area in which the access information is recorded according to the present invention has a structure similar to that of the recording apparatus as shown in FIG. . However, since it is a reproducing apparatus, it includes a reading section instead of the recording / reading section 1. In the reproduction apparatus according to the present invention, once the recording disc 100 including the access information area in which the access information according to the present invention is recorded is loaded, the reproduction apparatus accesses the DMA once to determine whether or not data is recorded in the DMA. It is determined whether (100) has been finalized. If the recording disc 100 has not been finalized once, the access information area according to the present invention is accessed to obtain final access information. From the final access information, the recording device or the reproduction device recognizes the TDMA area in which the final TDDS information is recorded. Those skilled in the art can easily operate the reproducing apparatus according to the present invention from the description of the recording disc 100 and the recording apparatus including the access information area according to the present invention described above. You will know.

Once the recording disk 100 is a blank disk which has not been initialized, no data is recorded in the access information area at all. The recording apparatus once performs initialization for use of the recording disk 100. Once the recording disk 100 is initialized, the initial access information is recorded in the data structure according to various embodiments as described above in the first recording cluster of the access information area.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, an access time for reading the updated information can be shortened more in the case of a recording disc once the predetermined information is updated and recorded in a new position. In addition, when there are a plurality of update areas for recording the updated information necessary for the use of the recording disc once, the recording device or the reproduction device quickly selects the update area in which the finally updated information is recorded among the plurality of update areas. Can be easily and easily determined.

Claims (58)

In a one-time recording disc having at least one recording layer, A plurality of update areas in which predetermined information to be updated is recorded; And And at least one access information area in which access information indicating an update area in which information finally updated is recorded is recorded among the plurality of update areas. The method of claim 1, The access information may include a number of the plurality of update areas or position information of each update area. The method of claim 2, And the position information of each update region includes a start position and an end position of each update region. The method of claim 2, The location information of each update area includes a start position of each update area and a size of the area. The method of claim 2, And the location information of each update area includes an end position of each update area and a size of the area. The method of claim 1, And the access information is updated only when the update area in which the updated information is finally recorded is changed. The method of claim 2, And said access information is updated when a new update area is added. The method of claim 2, And the access information is updated when the location information of each update area is changed. The method of claim 1, And the access information is repeatedly recorded in the access information area a plurality of times. The method of claim 1, And the access information is flag information indicating an update area in which information finally updated is recorded. The method of claim 1, And the plurality of update areas are physical areas. The method of claim 1, And wherein the plurality of update areas are areas obtained by logically dividing a plurality of physical update areas. The method of claim 1, The predetermined information to be updated is temporary defect management information (Temporary Disc Defect Structure), wherein the update area is a temporary disc management area (Temporary Disc Management Area). The method of claim 1, And the disc is a single recording layer disc including a lead-in area, a data area and a lead-out area, wherein the access information area is provided in at least one of the lead-in area or the lead-out area. The method of claim 1, The disc is a dual recording layer disc, each recording layer comprising an inner area, a data area and an outer area, and wherein the access information area is provided in at least one of the inner areas or outer areas. . In the method of writing data to a recording disc once, Recording predetermined information updated in one of a plurality of update areas provided in the disc; And And recording access information indicative of an update area in which finally updated information is recorded among the plurality of update areas in an access information area provided in at least one of the disks. The method of claim 16, The access information includes the number of the plurality of update areas or location information of each update area. The method of claim 17, The location information of each update region includes a start position and an end position of each update region. The method of claim 17, The location information of each update area includes a start position of each update area and a size of the area. The method of claim 17, The location information of each update area includes an end position of each update area and a size of the area. The method of claim 16, The access information recording step, And recording updated access information indicating the changed update area only when the update area in which the updated information is finally recorded is changed. The method of claim 17, The access information recording step, And when the new update area is added to the disc, access information including the number of changed update areas or the location information of the added update area. The method of claim 17, The access information recording step, And when the location information of at least one of the plurality of update areas is changed, access information including the changed location information. The method of claim 16, In the recording of the access information, the access information is repeatedly recorded in the access information area a plurality of times. The method of claim 16, And wherein the access information is flag information indicating an update area in which finally updated information is recorded. The method of claim 16, And wherein the plurality of update regions is a physical region. The method of claim 16, And wherein the plurality of update regions are logically divided regions of the plurality of physical update regions. The method of claim 16, The predetermined information to be updated is temporary defect management information (Temporary Disc Defect Structure), the update area is characterized in that the temporary disc management area (Temporary Disc Management Area). The method of claim 16, And said disc is a single recording layer disc comprising a lead-in area, a data area and a lead-out area, wherein said access information area is provided in at least one of said lead-in area or lead-out area. The method of claim 16, Said disc is a dual recording layer disc, each recording layer comprising an inner area, a data area and an outer area, said access information area being provided in at least one of said inner areas or outer areas. . In a data recording apparatus on a write once disc, A recording / reading unit which records or reads information on the disc; And At least one access information provided on the disc, the access information being recorded in one of a plurality of update areas provided on the disk, and indicating an update area in which information finally updated among the plurality of update areas is recorded; And a control unit for controlling the recording / reading unit to record in an area. The method of claim 31, wherein The access information may include the number of the plurality of update regions or location information of each update region. 33. The method of claim 32, And the position information of each update region includes a start position and an end position of each update region. 33. The method of claim 32, The location information of each update area may include a start position of each update area and a size of the area. 33. The method of claim 32, The location information of each update area includes an end position of each update area and a size of the area. The method of claim 31, wherein And the control unit controls the recording / reading unit to record updated access information indicating the changed update area only when the update area in which the updated information is finally recorded is changed. 33. The method of claim 32, And the controller controls the recording / reading unit to record access information including the number of changed update regions or the position information of the added update region when a new update region is added to the disc. 33. The method of claim 32, And the controller controls the recording / reading unit to record access information including the changed position information when at least one position information of the plurality of update regions is changed. The method of claim 31, wherein And the controller controls the recording / reading unit to repeatedly record the access information in the access information area a plurality of times. The method of claim 31, wherein And the access information is flag information indicating an update area in which finally updated information is recorded. The method of claim 31, wherein And wherein the plurality of update regions is a physical region. The method of claim 31, wherein And the plurality of update regions are regions obtained by logically dividing a plurality of physical update regions. The method of claim 31, wherein The predetermined information to be updated is a temporary defect management information (Temporary Disc Defect Structure), characterized in that the update area is a temporary disc management area (Temporary Disc Management Area). The method of claim 31, wherein And the disc is a single recording layer disc including a lead-in area, a data area and a lead-out area, wherein the access information area is provided in at least one of the lead-in area or the lead-out area. The method of claim 31, wherein The disc is a dual recording layer disc, each recording layer comprising an inner area, a data area and an outer area, and wherein the access information area is provided in at least one of the inner areas or outer areas. . In the method of playing a recording disc once, Obtaining finally updated access information in at least one access information area provided on the recording disc; And And obtaining, from the access information, information on an update area in which information finally updated is recorded among a plurality of update areas provided on the disc. 47. The method of claim 46 wherein And wherein the access information includes location information of the plurality of update areas and identification information of an update area in which finally updated information is recorded. 47. The method of claim 46 wherein And wherein the access information includes location information of an update area in which the finally updated information is recorded. The method of claim 48, And the position information of the update area in which the finally updated information is recorded includes a start position and an end position of the update region. 47. The method of claim 46 wherein And wherein the plurality of update regions is a physical region. 47. The method of claim 46 wherein And wherein the plurality of update regions are logically divided regions of the plurality of physical update regions. 47. The method of claim 46 wherein The predetermined information to be updated is temporary defect management information (Temporary Disc Defect Structure), the update area is characterized in that the temporary disc management area (Temporary Disc Management Area). In a reproduction device of a write once disc, A reading unit which reads the data recorded on the recording disc once; And An update in which the reader is controlled to obtain finally updated access information in at least one access information area provided on the recording disc, and wherein the updated information is finally recorded among the plurality of update areas provided on the disc from the access information; And a control unit for obtaining information about the area. The method of claim 53, And the access information includes location information of an update area in which the finally updated information is recorded. The method of claim 54, And the position information of the update area in which the finally updated information is recorded includes a start position and an end position of the update region. The method of claim 54, And wherein the plurality of update regions is a physical region. The method of claim 54, And the plurality of update regions are regions obtained by logically dividing a plurality of physical update regions. The method of claim 54, The predetermined information to be updated is a temporary defect management information (Temporary Disc Defect Structure), characterized in that the update area is a temporary disc management area (Temporary Disc Management Area).

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