CN1898739A - Method and apparatus for recording and/or reproducing data on/from write-once disc, and write-once disc therefor - Google Patents

Abstract

The present invention provides a method and apparatus for recording data on and/or reading data from a write-once disc having at least one recording layer, the write-once disc comprising : a plurality of update areas in which predetermined updated information is recorded; and at least one access information area in which access information indicating an update area in which finally recorded updated information is recorded is recorded. By using a predetermined location of updated information, the access time for reading updated information is reduced. In addition, when there is an update area for writing updated information required to use a write-once disc, the recording device or the reproducing device can quickly and easily determine the one in which the updated information is finally recorded among the plurality of update areas. update area.

Description

Method and device for recording data on and/or reproducing data from a write-once disc and write-once disc

Technical field

The present invention relates to a method and apparatus for recording data on and/or reproducing data from a write-once disc, and more particularly to a method for recording access information on a write-once disc for faster access A method and apparatus for using information necessary for the write-once disc, and a write-once disc used with the above method and apparatus.

Background technique

New information can be repeatedly recorded on a rewritable disc on which information has already been recorded. However, when new information is recorded on a write-once disc, since already recorded information can neither be erased nor repeatedly recorded in a location in which information is recorded, it is necessary to allocate a new location to Update recorded information.

Usually, only the information that is finally updated is meaningful. Therefore, in order to read the finally updated information, an update area is allocated to the data area, and the disk drive detects the finally updated information by searching the update area in which the updated information is recorded. When much information is recorded in the update area, it takes a lot of time to detect desired information.

On a write-once disc on which defect management is performed by the drive, there is an area that records information for managing defects generated when the write-once disc is used and information indicating the recording status of the write-once disc. information. Unlike rewritable disks, according to the characteristics of write-once disks, since updated information cannot be repeatedly recorded at a position where existing information has been recorded when it is necessary to update defect management information, the updated information must is recorded at the empty position. Therefore, a relatively large update area is required. Usually, an update area is allocated to a lead-in area or a lead-out area. However, sometimes an update area may be assigned to a data area to increase the update count according to the user's designation.

When using a write-once disc, the information of the final update required is recorded in the update area allocated to the data area, and when the information indicating that the update area is allocated to the data area and the information indicating the location of the update area are included in the final update When all the update areas allocated to the lead-in area or the lead-out area are searched, the last updated information or the position where the last updated information is recorded cannot be detected.

Contents of the invention

Technical solutions

According to an aspect of the present invention, there is provided a write-once disc having recorded thereon information having a data structure by which updates required for reading using the write-once disc can be reduced. access time of the information.

According to another aspect of the present invention, there are also provided a data recording method and apparatus by which an access time for reading updated information required to use a write-once disc can be reduced.

According to another aspect of the present invention, there are provided a data reproducing method and apparatus by which an access time for reading updated information required to use a write-once disc can be reduced.

Beneficial Effects

According to the present invention, when using a write-once disc on which predetermined information is updated and recorded in a new location, access time for reading updated information can be reduced. In addition, when there are a plurality of update areas for writing updated information required to use the write-once disc, the recording device or the reproducing device can quickly and easily determine the final updated information among the plurality of update areas. The update area in which information is recorded.

Description of drawings

These and/or other aspects and advantages of the present invention will become clearer and easier to understand through the following description of the embodiments in conjunction with the accompanying drawings, wherein:

1A and 1B are structures of a write-once disc according to an embodiment of the present invention;

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

3A and 3B are detailed structures of a write-once disc with dual recording layers according to an embodiment of the present invention;

4A and 4B are detailed structures of a write-once disc with dual recording layers according to another embodiment of the present invention;

FIG. 5 shows the process of recording data in a user data area and a spare area according to an embodiment of the present invention;

Fig. 6 is the data structure of the access information according to the first embodiment of the present invention;

Fig. 7 is the data structure of the access information according to the second embodiment of the present invention;

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

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

Fig. 10 is the data structure obtained by dividing the whole TDMA into a plurality of virtual TDMAs;

Figure 11 is a block diagram of a recording device according to an embodiment of the present invention; and

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

Best way

According to an aspect of the present invention, there is provided a write-once disc having at least one recording layer, the disc comprising: a plurality of update areas in which predetermined updated information is recorded; and at least one access information area in which access information indicating the update area in which the finally updated information is recorded.

According to another aspect of the present invention, there is provided a method of recording data on a write-once disc, the method comprising: recording predetermined updated information in a plurality of update areas allocated to the write-once disc an update area; and recording access information indicating the update area in which the information finally updated is recorded in at least one access information area allocated to the write-once disc.

According to another aspect of the present invention, there is provided an apparatus for recording data on a write-once disc, the apparatus comprising: a write/read unit for recording information on the write-once disc or from a write-once disc read information; and a controller that controls the write/read unit to record predetermined updated information in one update area among a plurality of update areas assigned to the write-once disc, and controls the write/read unit Access information is recorded in at least one access information area allocated to the write-once disc.

According to another aspect of the present invention, there is provided a method of reproducing a write-once disc, the method comprising: obtaining finally updated access information from at least one access information area allocated to a write-once disc; The access information obtains information indicating an update area in which access information updated last is recorded among a plurality of update areas allocated to a write-once disc.

According to another aspect of the present invention, there is provided an apparatus for reproducing a write-once disc, the apparatus comprising: a reader for reading data recorded on the write-once disc; and a controller for controlling the reading The reader obtains the finally updated access information from at least one access information area allocated to the write-once disc, and controls the reader to obtain from the finally updated access information an indication that in the plurality of update areas allocated to the write-once disc the last Information of an update area in which updated access information is recorded.

Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention.

The method of the present invention

Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

1A and 1B are structures of a write-once disc according to an embodiment of the present invention. FIG. 1A is a structure of a write-once disc having a single recording layer. FIG. 1B is a structure of a write-once disc having dual recording layers.

A write-once disc having a single recording layer includes a lead-in area, a data area, and a lead-out area arranged from the inner periphery to the outer periphery.

Each of the first recording layer L0 and the second recording layer L1 of the write-once disc having dual recording layers includes a lead-in area, a data area, and a lead-out area arranged from the inner circumference to the outer circumference.

FIG. 2 is a detailed structure of a write-once disc having a single recording layer 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), a first temporary disc management area (TDMA1), an access information area (AIA) and a recording condition test area. The lead-out area includes a third disk management area (DMA3) and a fourth disk management area (DMA4). In addition, the lead-out area may further include at least one of a temporary disk management area, a recording condition test area, and an AIA. That is, at least one of AIA, DMA, TDMA, and recording condition test area exists in at least one of the lead-in area and/or the lead-out area.

3A and 3B are detailed structures of a write-once disc having dual recording layers according to an embodiment of the present invention. FIG. 3A is the structure of the first recording layer L0, and FIG. 3B is the structure of the second recording layer L1. The structure of the first recording layer L0 shown in FIG. 3A is the same as that of the write-once disc having a single recording layer shown in FIG. 2 . The structure of the second recording layer L1 shown in FIG. 3B is similar to that of the first recording layer L0. However, in the structure of the second recording layer L1, AIA is not allocated to the second inner area, and two TDMAs are allocated to the second data area.

A write-once disc with dual recording layers includes five TDMAs, TDMA1 to TDMA5. The positions and sizes of TDMA1 and TDMA2 are known to the recording device and/or the reproducing device. However, TDMA3, TDMA4, and TDMA5 are allocated to the data area by a user or a recording device and/or a reproducing device when disc initialization is performed to use a write-once disc having dual recording layers. When the temporary disk management structure (TDMS) is recorded from the TDMA1, the temporary disk defect structure (TDDS) including the size and location of the TDMA allocated to the data area is recorded in the TDMA1.

4A and 4B are detailed structures of a write-once disc having dual recording layers according to another embodiment of the present invention. FIG. 4A is the structure of the first recording layer L0, and FIG. 4B is the structure of the second recording layer L1. TDMA1, TDMA2, and TDMA5 are assigned to the write-once disc having a double recording layer shown in FIGS. 4A and 4B. That is, in addition to the known TDMA1 and TDMA2, only TDMA5 is allocated to the second data area by a user or a recording device and/or a reproducing device when disc initialization is performed to use a write-once disc having a dual recording layer.

An area such as TDMA allocated to a write-once disc and processing of recording data in the area will now be described.

TDMA is an area in which TDMS for managing a write-once disc is recorded before finalization of the write-once disc. Finalization of a write-once disc is an operation that prevents a write-once disc from being recorded again. The write-once disc is finalized when data can no longer be recorded on the write-once disc by the user's selection, or when data cannot be additionally recorded on the write-once disc.

TDMS includes Temporary Defect List (TDFL), TDDS and Space Bit Map (SBM). The TDFL includes information indicating an area in which a defect is generated and information indicating a replacement area. The TDDS manages the TDFL, and includes a location pointer indicating where the TDFL is recorded, a location pointer indicating where the SBM is recorded, information indicating the location and size of the spare area allocated to the data area, and information indicating the location of the spare area allocated to the data area. The location and size information of the TDMA. The SBM uses a bit map to display the data recording status of the write-once disc by allocating different bit values to clusters in which data is recorded and clusters in which data is not recorded in units of clusters, wherein the clusters are data logging unit.

When a write-once disc is loaded into a recording device and/or a reproducing device, a final updated TDMS, especially a TDDS is rapidly required to use the write-once disc in said device.

Generally, when a write-once disc is loaded into a recording device and/or a reproducing device, the recording device and/or reproducing device determines how to manage the write-once disc by reading information from the lead-in area and/or the lead-out area and How to record or reproduce data. If the amount of information recorded in the lead-in area and/or the lead-out area is large, it takes more time to prepare for recording or reproduction after the write-once disc is loaded. Therefore, TDMS is used, and TDMS generated when recording data on a write-once disc or reproducing data from a write-once disc is recorded in TDMA, which is separated from the defect management area and allocated to the lead-in area and /or export area.

When a write-once disc is finalized, since information access using a write-once disc is made possible quickly by allowing a recording or reproducing device to read only meaningful information from a defect management area, by only updating and The final meaningful information in the recorded TDFL and TDDS is stored in the DMA, so that the TDMS, that is, the TDFL and TDDS recorded in the TDMA are finally recorded in the DMA.

FIG. 5 shows 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 denotes a user data area, and B denotes a spare area. Methods of recording user data in the user data area include a continuous recording mode and a random recording mode. In the continuous recording mode, user data is recorded continuously and sequentially, and in the random recording mode, user data is recorded randomly. Areas ① to ⑦ represent units in which post-record verification is performed.

The recording device writes user data into area ① and verifies whether data is written normally or a defect is generated in area ①. If a portion where a defect has occurred is found, that portion is designated as a defective area, ie, defect #1. Furthermore, the recording device rewrites the data written in defect #1 to the spare area. The portion into which the data written in Defect #1 is rewritten is called Replacement #1. The recording device writes the user data into the area ② and verifies whether the data is written normally or a defect is generated in the area ②. If a portion where a defect has occurred is found, that portion is designated as a defective area, ie, defect #2. Likewise, Replacement #2 corresponding to Defect #2 is generated. Furthermore, in the area ③, defect #3 is generated. In the region ④, since no defective portion was found, there was no defective region.

If the end of recording operation #1 is predicted after the user data has been written and verified, i.e., if the user presses the eject button, or if the recording of the user data assigned to the recording operation is completed, the recording device will communicate with defect #1 , defect #2, and defect #3, which are defect areas generated in the area ① to area ④, are written into the TDMA as TDFL #1. Furthermore, the management structure for managing TDFL#1 is written in TDMA as TDDS#1. A recording operation is a work unit determined by a user's intention or desired recording work. In this embodiment, the recording operation indicates a time period from when a write-once disc is loaded and a recording job of predetermined information is performed to when the write-once disc is ejected from a recording apparatus.

When the write-once disc is loaded again, recording operation #2 starts, the recording condition of the recording condition test area is tested, and user data is written on the basis of the test result. That is, in recording operation #2, user data is written in areas ⑤ to area ⑦ in the same manner as recording operation #1, and defect #4, defect #5, replacement #4, and replacement #5 are generated. When the recording operation #2 ends, the recording apparatus writes information related to defect #4 and defect #5 into TDMA as TDFL #2. In addition, the management structure for managing TDFL#2 is written in TDMA as TDDS#2.

As shown in FIGS. 2 to 4, when a plurality of TDMAs and spare areas are allocated to a write-once disc, the TDMAs and spare areas are used in a predetermined order. For example, when the data writing path applied to the write-once disc with dual recording layers shown in FIG. When the data path is recorded from the second inner area of the second recording layer L1 to the second outer area of the second recording layer L1, the data in the spare area is recorded from the first spare area of the first recording layer L0 . When the first spare area is full, the second spare area, the third spare area and the fourth spare area are used in order.

Similarly, TDMS is recorded from TDMA1 of the first recording layer L0. When TDMA1 is full, updated TDMS is recorded in TDMA2 allocated to the second inner area of the second recording layer L1. When TDMA2 is full, newly updated TDMS is recorded in TDMA3 allocated to the first data area of the first recording layer L0. In this embodiment, TDMA1 and TDMA2 allocated to the inner area of the recording layer are preferably used for a write-once disc. However, the TDMA allocated to the data area may be allocated or not allocated by a user's selection. Therefore, when the TDMA allocated to the inner area of the recording layer is full, the TDMA allocated to the data area is used.

When the last updated TDMS is written to the TDMA allocated to the data zone, the write-once disc is ejected and the write-once disc is reloaded into the recording device. The recording device must obtain the last updated TDMS to use the write-once disc. However, TDMS is recorded in the TDMA allocated to the data area, and the disk drive cannot recognize the fact that TDMS is recorded in the TDMA allocated to the data area until the disk drive accesses the TDDS included in the TDMS.

In order to solve this problem, in the present invention, AIAs are individually allocated to predetermined positions of the write-once disc. Access information (AI) is recorded in the AIA. AI indicates where update information such as TDMS is recorded.

Furthermore, the update information indicates information that the recording and/or reproducing device must recognize to use the write-once disc during initialization when the write-once disc is loaded to the recording and/or reproducing device. Also, an area in which update information is recorded is called an update area. In this embodiment, the typical update information is TDMS, and the typical update area is TDMA.

As shown in FIGS. 2 to 4, the AIA is preferably, but not necessarily, assigned to a predetermined location of the lead-in area or the inner area. Also, the size of the AIA is best but not necessarily bounded by minimizing the amount of AI recorded in the AIA and the AI update count, this is because, if the size of the AIA is large or if there are multiple AIAs allocated, getting the AI will cost longer time.

FIG. 6 is a data structure of access information (AI) according to the first embodiment of the present invention. AI shown in FIG. 6 shows TDMS as update information, TDMA as an update area, and AI in the write-once disc with dual recording layers shown in FIG. 3 .

Referring to FIG. 6 , the AI header includes an AI identifier indicating that subsequent data is AI, and an AI update count showing an update count of the AI.

The AI includes the total number of TDMAs allocated to the write-once disc, information indicating the TDMA in which the final TDDS is recorded, and information indicating the position of the TDMA. Each TDMA location information may include information indicating a start location and an end location of each TDMA or information indicating a start location or an end location and a size of each TDMA. Since the TDDS includes a pointer indicating the location of the corresponding TDFL, the AI includes information indicating the TDMA in which the final TDDS is recorded.

When a write-once disc according to the present invention is loaded into a disc drive, the disc drive can identify the TDMA in which the final TDDS was recorded by accessing the AIA at a known location and obtain the final updated AI, and can obtain Get the final TDDS. In order to minimize the access time to obtain the final AI recorded in the AIA, preferably but not necessarily, the AI is continuously recorded in the AIA in continuous recording mode and the AI update count is minimized.

According to an embodiment of the present invention, in order to minimize the AI update count, the AI is updated whenever the TDMA in which the final TDDS is recorded is changed. In addition, when information indicating the number of TDMAs allocated to a write-once disc and information indicating the position of the TDMA are included in the AI, it is also updated when a new TDMA is allocated or when the information indicating the position of the TDMA is changed. AI. Furthermore, preferably, but not necessarily, the same AI is recorded repeatedly in preparation for errors being made in the recorded AI.

Since the AI to be updated is continuously recorded after the previous AI, even if the information indicating the detailed address where the final TDDS is recorded is not included in the AI, due to the RF signal obtained from the area where the data was recorded and the data was never recorded If there is a difference between the RF signals obtained in the area, the recording device and/or the reproducing device can also quickly search for the final TDDS to be recorded by using the track jump method to identify the boundary between the area where data is recorded and the area where data is not recorded. position in it.

FIG. 7 is a data structure of AI according to a second embodiment of the present invention. The AI shown in FIG. 6 includes information indicating the locations of all TDMAs and information indicating the TDMA in which the final TDDS is recorded. However, the AI shown in FIG. 7 includes information indicating the location of the TDMA in which the final TDDS is recorded. The information indicating the location of the TDMA in which the final TDDS is recorded may be expressed as an address of the first physical sector of the first cluster of the TDMA and an address of the first physical sector of the last cluster of the TDMA. However, those of ordinary skill in the art should understand that various modifications can be made to the representation method of the information indicating the location of the TDMA in which the final TDDS is recorded without departing from the spirit and scope of the present invention.

FIG. 8 is a data structure of AI according to a third embodiment of the present invention. The data structure of AI shown in Fig. 8 is the same as that of TDDS. That is, TDDS is used as AI without defining a data structure of individual AI. In order to use TDDS as AI, an information field indicating the location of the TDMA in which the final TDDS is recorded must be added to the TDDS.

FIG. 9 is a data structure of AI according to a fourth embodiment of the present invention. The data structure of AI shown in FIG. 9 is the same as that of TDDS as described in the third embodiment. However, unlike the third embodiment, a flag indicating the location of the TDMA in which the final TDDS is recorded is additionally included in the TDDS. In this embodiment, the flag consists of 8 bits, wherein 5 bits b0 to b4 indicate the TDMA in which the final TDDS is recorded, and 3 bits b5 to b7 are reserved bits. For example, it can be defined as follows: when b0 to b4 are "00001b", the final TDDS is recorded in TDMA1; when b0 to b4 are "00010b", the final TDDS is recorded in TDMA2; when b0 to b4 are " 00100b", the final TDDS is recorded in TDMA3, when b0 to b4 is "01000b", the final TDDS is recorded in TDMA4, when b0 to b4 is "10000b", the final TDDS is recorded in TDMA5 .

A plurality of TDMAs allocated to the write-once disc according to the present embodiment are used consecutively based on the data recording direction. Therefore, a TDMA physically more than one in number is considered as one continuous TDMA, which is divided into a plurality of virtual TDMAs.

FIG. 10 is a data structure obtained by dividing the entire TDMA into a plurality of virtual TDMAs. For example, in a write-once disc having dual recording layers, when TDMA is used in the order of TDMA1, TDMA2, TDMA3, TDMA4, and TDMA5, and if each of TDMA1 and TDMA2 includes 2048 clusters, each of TDMA3 and TDMA4 Including 4096 clusters, TDMA5 includes 8192 clusters, and the entire TDMA includes 20480 clusters. If the entire TDMA is divided into 512 cluster units, 1024 cluster units, or 2048 cluster units, the entire TDMA is divided into 40 virtual TDMAs, 20 virtual TDMAs, or 10 virtual TDMAs.

If the size of TDMA3 among TDMA1 to TDMA5 allocated to the write-once disc is very large, and if the final TDDS is recorded in TDMA3, the recording and/or reproducing device recognizes from AI that the final TDDS is recorded in TDMA3 Facts, and get the ultimate TDDS by searching TDMA3. However, when the size of the TDMA3 is very large, it may take a long time to search the TDMA3 to obtain the final TDDS. Therefore, to solve this problem, the concept of virtual TDMA described above is used. As shown in Figure 10, the size of each virtual TDMA can be the same. However, the size of each virtual TDMA is not limited to this embodiment.

The recording and/or reproducing apparatus divides the entire TDMA into a plurality of virtual TDMAs, and updates the AI when the virtual TDMA in which the final TDDS is recorded changes. Each of the data structures according to the first to fourth embodiments can be used as the data structure of the AI according to the present embodiment. However, the AI of the present embodiment includes information indicating the virtual TDMA in which the final TDDS is recorded or includes information indicating the position of the virtual TDMA in which the final TDDS is recorded.

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

Referring to FIG. 11 , the recording device includes a write/read unit 1 , a controller 2 and a memory 3 . The write/read unit 1 writes data on the write-once disc 100 and reads the recorded data to verify whether there is a defect in the recorded data. The AIA according to the present invention is assigned to the write-once disc 100 .

In order to manage defects, the controller 2 uses a verify-after-write method of detecting a portion in which a defect occurs by writing data in predetermined units and verifying the recorded data. The controller 2 checks where defects are generated by writing and verifying user data per recording operation unit, generates a defect list indicating where a defective area exists as a result of the inspection, stores the generated defect list in the memory 3, collects multiple defect lists, store the plurality of defect lists as TDFLs in an update area assigned to the write-once disc 100, that is, TDMA, and also write TDDS of the TDFLs for managing recording into the TDMA. In a recording operation, the verify-after-write work is performed at least once, and usually several times. A defect list obtained by performing verify-after-write is temporarily stored in the memory 3 as TDFL. When the recording operation is completed, the controller 2 reads the TDFL stored in the memory 3, supplies the TDFL to the write/read unit 1, and instructs the write/read unit 1 to write the TDFL into the disk allocated to the write-once disc 100. TDMA.

When data can no longer be recorded on the write-once disc 100, or when the user no longer wishes to write data in the data area (when the write-once disc 100 is finalized), the controller 2 will record in the TDMA The TDFL and TDDS writes are assigned to the write-once disc 100 in the DMA.

The controller 2 controls the write/read unit 1 to write data having the data structure according to the present invention. That is, the controller 2 controls the write/read unit 1 to write predetermined update information, that is, TDMS including TDFL or TDDS, into one update area among the plurality of update areas allocated to the write-once disc 100, and when necessary update the AI The updated AI is written into the AIA assigned to the write-once disc 100 at the time of writing.

A method of recording AI according to an aspect of the present invention will now be described in detail based on the structure of the recording apparatus described above.

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

When the write-once disc 100 is loaded into the recording apparatus, the controller 2 controls the write/read unit 1 to write predetermined user data into the write-once disc 100 in operation 71 .

In operation 73, it is determined whether information to be updated is generated based on a result of performing a post-write verification job, which is performed at least once during one recording operation. In this embodiment, the information to be updated refers to TDMS. When the TDMS is generated, the TDMS is temporarily stored in the memory 3, and when the recording operation is completed, the controller 2 reads the TDFL stored in the memory 3 and supplies the TDFL to the write/read unit 1, and in operation 75 , the write/read unit 1 writes the TDFL into one update area among a plurality of update areas allocated to the write-once disc 100 . In this embodiment, the update area refers to TDMA.

In operation 77, the controller 2 determines whether there is another recording operation, and repeats operations 71 to 77 if there is another recording operation.

If there is not another recording operation, then in operation 79 the controller 2 determines whether the AI needs to be updated. In this embodiment, the AI Updated.

In operation 81 , the controller 2 controls the write/read unit 1 to write an AI indicating an update area in which information finally updated among a plurality of update areas is recorded in at least one AIA assigned to the write-once disc 100 . Preferably, but not necessarily, the same AI is repeatedly recorded in case an error occurs in the recorded AI.

As described above, if the AI indicating the position where the final TDMS is recorded is recorded in the AIA of the write-once disc, when the write-once disc 100 is loaded into the recording device or the reproducing device again, the Devices or rendering devices can more quickly and easily access the final TDDS.

An apparatus (not shown) for reproducing a write-once disc 100 including an AIA in which an AI according to the present invention is recorded has a structure similar to that of the recording apparatus shown in FIG. 11 . However, since the device is a reproducing device, a reader is included instead of the write/read unit 1 . When the write-once disc 100 including the AIA in which the AI is recorded is loaded to the reproducing device, the reproducing device determines whether the write-once disc 100 is finalized by accessing the DMA and determining whether data is recorded in the DMA. If the write-once disc 100 is not finalized, the reproducing device accesses the AIA and obtains the finalized AI. The recording device or the reproducing device recognizes the TDMA in which the TDDS is recorded from the final AI. Through the description of the write-once disc 100 including the AIA and the recording device thereof, those skilled in the art can easily understand the operation of the recording device according to the present invention.

If the write-once disc 100 is a blank disc that has not been initialized, data is not recorded in the AIA at all. The recording device performs initialization to use the write-once disc 100 . When the write-once disc 100 is initialized, the first AI having the data structure according to the above-described various embodiments is recorded in the first recording cluster of the AIA.

While certain embodiments of the present invention have been shown and described, it should be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents. to modify.

Claims (63)

CLAIMS 1. A write-once disc having at least one recording layer, said disc comprising: a plurality of update areas in which scheduled updated information is recorded; and At least one access information area (AIA) in which is recorded access information (AI) indicating an update area in which finally updated information is recorded. 2. The disc of claim 1, wherein the access information includes at least one of the plurality of update areas or includes information indicating a location of at least one of the plurality of update areas. 3. The disc of claim 2, wherein the information indicating the location of at least one of the plurality of update areas includes a start position and an end position of each update area. 4. The disc of claim 2, wherein the information indicating the location of at least one of the plurality of update areas includes a start position and a size of each update area. 5. The disc of claim 2, wherein the information indicating the location of at least one of the plurality of update areas includes an end position and a size of each update area. 6. The disc of claim 1, wherein the access information is updated only when the update area in which the last updated information is recorded is changed. 7. The disc of claim 2, wherein the access information is updated when a new update area is added. 8. The disc of claim 2, wherein the access information is updated when information indicating a location of at least one update area among the plurality of update areas is changed. 9. The disc of claim 1, wherein the access information is repeatedly recorded in the access information area. 10. The disc of claim 1, wherein the access information is a flag indicating an update area in which finally updated information is recorded. 11. The disc of claim 1, wherein the plurality of update areas are physical areas. 12. The disc of claim 1, wherein the plurality of update areas are obtained by logically dividing a plurality of physical areas. 13. The disc of claim 1, wherein the predetermined updated information is a temporary disc defect structure (TDDS), and the update area is a temporary disc management area (TDMA). 14. The disc according to claim 1, wherein the write-once disc is a write-once disc having a single recording layer including a lead-in area, a data area, a lead-out area, and a At least one access information area of the lead-out area. 15. The disc according to claim 1, wherein the write-once disc is a write-once disc having dual recording layers, each recording layer comprising an inner area, a data area, an outer area, and an area assigned to the inner area or the outer area. at least one access information area of the area. 16. A method of recording data on a write-once disc, the method comprising: recording predetermined updated information in an update area among a plurality of update areas allocated to the write-once disc; and Access information (AI) indicating an update area in which information of a final update is recorded is recorded in at least one access information area (AIA) allocated to a write-once disc. 17. The method of claim 16, wherein the access information includes at least one of the plurality of update areas or includes information indicating a location of at least one of the plurality of update areas. 18. The method of claim 17, wherein the information indicating the location of at least one of the plurality of update regions includes a start location and an end location of each update region. 19. The method of claim 17, wherein the information indicating the location of at least one of the plurality of update regions includes a start location and a size of each update region. 20. The method of claim 17, wherein the information indicating the location of at least one of the plurality of update areas includes an end location and a size of each update area. 21. The method as claimed in claim 16, wherein the step of recording access information comprises: only when the last updated information is changed by one update area among the plurality of update areas recorded therein, recording the information indicating the change Updated access information for the update area. 22. The method as claimed in claim 17, wherein the step of recording access information comprises: when a new update area is added to the write-once disc, recording at least one of the update areas including changes or including an indication of the added The access information for the location information of the update zone. 23. The method as claimed in claim 17, wherein the step of recording the access information comprises: when the information indicating the location of at least one update area among the plurality of update areas is changed, recording the information including the information indicating the changed location access information. 24. The method of claim 16, wherein recording the access information comprises repeatedly recording the access information in the access information area. 25. The method of claim 16, wherein the access information is a flag indicating an update area in which finally updated information is recorded. 26. The method of claim 16, wherein the plurality of update areas are physical areas. 27. The method of claim 16, wherein the plurality of update areas are obtained by logically dividing a plurality of physical areas. 28. The method of claim 16, wherein the predetermined updated information is a Temporary Disk Defect Structure (TDDS), and an update area in which the finally updated information is recorded is a Temporary Disk Management Area (TDMA). 29. The method of claim 16, wherein the write-once disc has a single recording layer comprising a lead-in area, a data area, a lead-out area, and at least one access zone assigned to the lead-in area or the lead-out area. information area. 30. The method of claim 16, wherein the write-once disc has dual recording layers, each recording layer comprising an inner area, a data area, an outer area, and at least one access information assigned to the inner area or the outer area district. 31. An apparatus for recording data on a write-once disc, the apparatus comprising: a write/read unit for recording information on the write-once disc or reading information from the write-once disc; and a controller, controlling the write/read unit to record predetermined updated information in one update area among a plurality of update areas allocated to the write-once disc, and controlling the write/read unit to indicate the final updated information The access information (AI) of the update area recorded therein is recorded in at least one access information area (AIA) allocated to the write-once disc. 32. The apparatus of claim 31, wherein the access information includes the plurality of update areas or includes information indicating locations of the plurality of update areas. 33. The apparatus of claim 32, wherein the information indicating the locations of the plurality of update regions includes a start location and an end location of each update region. 34. The apparatus of claim 32, wherein the information indicating the locations of the plurality of update areas includes a start location and a size of each update area. 35. The apparatus of claim 32, wherein the information indicating the locations of the plurality of update areas includes an end location and a size of each update area. 36. The apparatus of claim 31, wherein the controller controls the write/read unit to write an update indicating the changed update area only when the update area in which the finally updated information is recorded is changed. access information. 37. The device as claimed in claim 32, wherein when a new update area is added to the write-once disc, the controller controls the write/read unit to write the update area including a plurality of changes or including an indication Added the access information for the location information of the update area. 38. The apparatus of claim 32, wherein when the information indicating the location of at least one update area among the plurality of update areas is changed, the controller controls the write/read unit to write including indicating the change Access information for location information. 39. The apparatus of claim 31, wherein the controller controls the write/read unit to repeatedly write the access information into the access information area. 40. The apparatus of claim 31, wherein the access information is a flag indicating an update area in which finally updated information is recorded. 41. The apparatus of claim 31, wherein the plurality of update areas are physical areas. 42. The apparatus of claim 31, wherein the plurality of update areas are obtained by logically dividing a plurality of physical areas. 43. The apparatus of claim 31, wherein the predetermined updated information is a Temporary Disk Defect Structure (TDDS), and the update area is a Temporary Disk Management Area (TDMA). 44. The apparatus according to claim 31, wherein the write-once disc is a write-once disc having a single recording layer including a lead-in area, a data area, a lead-out area, and a At least one access information area of the lead-out area. 45. The apparatus according to claim 31, wherein the write-once disc is a write-once disc having dual recording layers, each recording layer comprising an inner area, a data area, an outer area, and an area assigned to the inner area or the outer area. at least one access information area of the area. 46. A method of reproducing a write-once disc, the method comprising: obtaining the finally updated access information (AI) from at least one access information area (AIA) allocated to the write-once disc; and Information indicating an update area in which the last updated access information is recorded among a plurality of update areas allocated to the write-once disc is obtained from the last updated access information. 47. The method of claim 46, wherein the access information includes the plurality of update areas or includes information indicating locations of the plurality of update areas. 48. The method of claim 46, wherein the access information includes information indicating a location of an update area in which the finally updated access information is recorded. 49. The method of claim 48, wherein the information indicating the location of the update area in which the finally updated access information is recorded includes a start location and an end location of the update area. 50. The method of claim 46, wherein the plurality of update areas are physical areas. 51. The method of claim 46, wherein the plurality of update areas are obtained by logically dividing a plurality of physical areas. 52. The method of claim 46, wherein the predetermined updated information is a Temporary Disk Defect Structure (TDDS), and an update area in which the finally updated information is recorded is a Temporary Disk Management Area (TDMA). 53. An apparatus for reproducing a write-once disc, the apparatus comprising: a reader for reading data recorded on the write-once disc; and a controller, controlling the reader to obtain finally updated access information (AI) from at least one access information area (AIA) allocated to the write-once disc, and controlling the reader to obtain an indication from the finally updated access information Information of an update area in which access information updated finally is recorded among a plurality of update areas allocated to a write-once disc. 54. The apparatus of claim 53, wherein the access information includes information indicating a location of an update area in which finally updated access information is recorded. 55. The apparatus of claim 54, wherein the information indicating the location of the update area in which the finally updated access information is recorded includes a start location and an end location of the update area. 56. The apparatus of claim 54, wherein the plurality of update areas are physical areas. 57. The apparatus of claim 54, wherein the plurality of update areas are obtained by logically dividing a plurality of physical areas. 58. The apparatus of claim 54, wherein the predetermined updated information is a Temporary Disk Defect Structure (TDDS), and an update area in which the finally updated information is recorded is a Temporary Disk Management Area (TDMA). 59. The disc of claim 13, wherein the access information includes information indicating locations of all the temporary disc management areas and information indicating the temporary disc management area in which the final temporary disc defect structure is recorded. 60. The disc of claim 59, wherein the information indicating the temporary disc management area in which the final temporary disc defect structure is recorded is the first physical sector of the first cluster of the temporary disc management area and the address of the first physical sector of the last cluster of the temporary disk management area. 61. The disc of claim 13, wherein the temporary disc defect structure is used as the access information without a separate data structure defining the access information. 62. The disc of claim 1, wherein the disc access time is reduced by using predetermined update information recorded in a new location. 63. The apparatus of claim 43, wherein the temporary disk management area is divided into a plurality of virtual temporary disk management areas, and the access is updated when the virtual temporary disk management area in which the final temporary defect management structure is recorded changes. information.

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