MXPA06009684A - Method and apparatus for overwriting data in write-once recording medium - Google Patents

Abstract

A method and apparatus for overwriting data in a recording medium, such as a Blu-ray disc write-once (BD-WO), are disclosed. The method includes when receiving a plurality of data record commands for a previously recorded area within the recording medium, replacement recording the received data for each record command on a non-recorded area within the recording medium, and when the plurality of record commands occur in a continuous area within the recording medium, the data is recorded on a management area within the recording medium as a management information for the plurality of record commands.

Description

METHOD AND APPARATUS FOR OVERWRITING DATA IN A SINGLE WRITING RECORDING MEDIA FIELD OF THE INVENTION The present invention relates to a write-once recording method, and more particularly to a method and apparatus for overwriting data in a write-once recording medium. BACKGROUND OF THE INVENTION An innovative high-density recording medium, such as a Blu-ray rewritable disc (BD_RE), for recording high-quality video data and high-quality audio data over a prolonged period of time is expected that is developed and introduced in the market. As shown in Figure 1, the BD-RE has an introduction area, a data area and an output area are divided and assigned. The data zone has an interior space area (hereinafter referred to as "ISA") in its upper portion and an outer reserved area (hereinafter referred to as "OSA") in its posterior portion, which are divided and assigned. The BD-RE records the data in grouping units. Here, referring to Figure 1, BD-RE detects if there is a defective area in the data area while BD-RE records the data. When the BD-RE detects a defective area in the data area, the BD-RE performs a replacement recording operation in which the data in the defective area is recorded in the reserved area, such as an ISA, and the data recorded in ISA are replaced by the data recorded in the defective area. Then BD-RE records the location information of the defective area and the location information of the ISA as management information of a defect list in the introduction area. Accordingly, when the defective area exists in the data area, the BD-RE performs a replacement recording operation in which "" the data recorded in the defective area is recorded in the reserved area. When playback is performed, the data recorded in the reserved area is read and played instead of the data recorded in the defective area in such a way that recording / playback errors can be prevented in advance. Recently, the standardization of the Blu-ray single-write disc (BD-WO) has been discussed among related companies. Since a write-once recording medium can be recorded only once in its entire area, the write-once recording medium (eg, optical disc) can not be physically rewritten in contrast to the rewritable recording medium ( for example an optimal disk). However, on the single-write optical disc, to edit recorded data, or to correct a corresponding portion, or for the convenience of a user or server, overwriting operations may be necessary and an efficient method is needed to allow the data is overwritten. SUMMARY OF THE INVENTION An object of the present invention relates to solving the problem is based on providing a method and an apparatus for overwriting data in a write-once recording medium that substantially eliminates one or more problems due to limitations and disadvantages of the related art. Another object of the present invention aimed at solving the problem is based on providing an effective method for recording an inscription when consecutively overwriting data on an original recorded area of a write-once recording medium according to the present invention. . The object of the present invention can be achieved by providing a method for overwriting data in a write-once recording medium that includes, when a plurality of data recording commands are received for a previously recorded area within the recording medium. , the replacement recording of the received data for each recording command in an area not recorded within the recording medium, and when the plurality of recording commands are executed in a continuous area within the recording medium, the data is granulated in the administration area within the recording medium as administration information for the plurality of recording commands. In another aspect of the present invention, a method is provided for overwriting data in a single write recording medium that includes during the reception of a data recording command for the previously recorded area within the recording, recording medium. replacement for the data received for the recording command in an area - not recorded within the recording medium, and recording a location information of the previous recording area and a replacement area as at least one registration in a management area, and record data while excluding an inscription from a defective area existing within the recorded area. In another aspect of the present invention, there is provided here an apparatus for overwriting data in a write-once recording medium that includes a memory for temporarily storing management information in accordance with a replacement recording and a replacement recording. by microcomputer of the data received for each recording command in an area not recorded within the recording medium, upon receiving a plurality of data recording commands for a previously recorded area within the recording medium, temporarily storing the information of according to the replacement recording for each recording channel, and control the administration information as an entry that will be recorded in an administration area within the recording medium, when there is a continuity between the administration information according to the command e recording for each recording command stored in the to memory. In another aspect of the present invention, an apparatus for overwriting data in a write-once recording medium including a recording unit that records data and administration information in the recording medium, and a replacement recording is provided. by microcomputer that records the data received for the recording command in an area not recorded within the recording medium, upon receiving a data recording command for a previously recorded area within the recording medium, recording a location information of the area previously recorded and a replacement area such as at least one inscription in a previously recorded area and a replacement area as at least one inscription in a management area, and control the collection unit in such a way that when the data is recorded while it is excluded an inscription of a defective area existing within the previously recorded area. In another aspect of the present invention there is provided a recording medium that includes a data area that includes a replacement area that replaces a previously recorded area according to a recording command for the previously recorded area within the recording medium and a temporary disk management area that records the location information of the previously recorded area and the replacement area as two pairs of inscriptions, where when the two pairs of inscriptions are recorded in the previously recorded area. BRIEF DESCRIPTION OF THE DRAWINGS The appended drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings: Figure 1 illustrates a schematic diagram illustrating a structure of a general rewritable optical disk and a method for handling defects. Figure 2 illustrates an overwriting method for a write-once optical disk according to the present invention.

Figure 3 illustrates a method for managing a defective area of a write-once optical disk according to the present invention. Figure 4 illustrates a method for recording overwrite management information in accordance with the present invention. Figures 5A and 5B illustrate an overwriting method according to one embodiment of the present invention. Figure 6 illustrates various overwriting formats according to the present invention. Figure 7 illustrates a format in which the overwrite management information is recorded in accordance with the present invention. Figure 8 illustrates a block diagram of a recording apparatus and / or a reproduction apparatus. DETAILED DESCRIPTION OF THE INVENTION Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. When possible, the same reference numbers will be used in all the drawings to refer to the same parts. Further, although the terms used in the present invention are selected from terms generally known and used, some of the terms mentioned in the description of the present invention have been selected by the applicant at his discretion, the detailed meaning of which is described in relevant parts of the present description. Furthermore, it is required that the present invention be understood not simply by the actual terms but by the meaning of each term. In this detailed description "recording medium" refers to all types of media that can record data and broadly includes all types of media regardless of the recording method, such as an optical disc, a magnetic tape, etc. Hereinafter, for simplicity of the description of the present invention, the optical disc, and more specifically the "Blu-ray disc (BD)", will be indicated as an example of the recording medium proposed here. However, it will be evident that the spirit or scope of the present invention can be applied in the same way to other types of recording means. Figure 2 illustrates an overwriting method for a single-write optical disc according to the present invention. As shown in Figure 2, a write-once Blu-ray disc (BD-WO) has an input area, a data area and an output area that are divided and assigned. The data zone has a reserved area (hereinafter called "ISA") in its upper portion and an outer reserved area (hereinafter referred to as "OSA") in its posterior portion, which are divided and assigned. In a write-once optical disc having the structure described above, the recording of the administration information can be updated several times while the disk is used if necessary. Accordingly, the disk includes a temporary disk management area (hereinafter referred to as "TDMA") in the input area as an area for recording an optical disk management information that can be rewritten several times. . A temporary defect list (called "TDFL") is recorded in TDMA. The TFL includes a defect list (DFL) consisting of a plurality of DFL entries in which the location information of the current defective areas and the overwriting areas is recorded, which will be described in detail in a subsequent process . In the divided optical disk and assigned as described above, if there is an original recording area in the data area, the corresponding area is not allowed to be physically overwritten due to the property of the single write optical disk. However, when a write command made by a user or server requests a drive (drive) to record data in an ab area (this is the original recording area) as shown in figure 2, the unit records the data in another area in the data area and replaces the original data in the present invention with newly recorded data. Accordingly, the user or the host can send a write command regardless of a specific area on the disk it was originally recorded or not. This allows the user to use the single-write optical disc as a rewritable optical disc. And this will be referred to as a logical overwrite (LOW) to distinguish from a physical overwrite. More specifically, referring to Figure 2, when performing the write command for area a-b, since area a-b is an original recorded area physically completed, the corresponding area can not be overwritten. Alternatively the data is recorded in the area c-d, which is a reserved area in the data area, and the administration information in the replacement recording is recorded as the TDFL information in the TDMA of the disk, thus executing the write command. For the originally recorded disc, when the server wants to reproduce the data in the ab area to the user request, the unit plays the data in the cd area instead of the data in the ab area with reference to the recorded administration information, thus executing a playback command. This method is performed identically to the recording method, in the reserved area, the data to be recorded in the defective area when there are consecutive defective areas on the disk, as shown in Figure 3. Figure 3 illustrates a method for administering a defective area of a write-once optical disk according to the present invention. As shown in Figure 3, on a single write optical disk having an input area, a data area and an output area that are divided and mapped, and where the data area has an ISA in its In the upper portion and an OSA in its posterior portion, a defective area ab may occur within a specific area in the data area in which the actual data will be recorded. Here the defective area can be physically made (or created) in one or more groupings. In the example shown in Figure 3, the defective area is produced in a plurality of consecutive groupings. This case can occur when although the defective area is made in a cluster, a plurality of neighboring groupings are treated as defective areas for the case in which the plurality of neighboring groupings are damaged or contaminated due to the optical disc unit settings. . If the plurality of consecutive groupings corresponds to defective areas as described above, the data that will be recorded in the corresponding area is recorded in reserved areas (ISA or OSA). In Figure 3, the data to be recorded in the corresponding area is recorded in the c-d area of an OSA. At this moment the data is recorded from an internal side of the reserved area to the exit area. As described above, if the data is recorded in the OSA, the administration information in the replacement recording is recorded as the TDFL information in the TDMA of the disk, thus executing a write command. Accordingly, for the originally recorded disc, when the server wishes to reproduce the data in the ab area at the request of the user, the unit plays the data in the cd area instead of the data in the ab area referring to the information of the user. recorded administration, executing a playback command. According to the present invention, the defect made in the multiple consecutive groupings, which require replacement recording in a reserved area, is especially called consecutive re-assignable defect (CDR). In relation to the CRD, the defect made in a grouping, which requires replacement recording in a reserved area, is called a re-assignable defect (RAD). Also the defective mode done in a cluster, which does not require the replacement recording in a reserved area, is called a non-reassignable defect (NRD). As shown in figures 2 and 3, in the point of view of recording data from an overwrite area in a reserved area, if consecutive defective areas are produced, the logical overwrite method is performed in a identical to the CDR type in which the data to be recorded in the defective area is recorded in a reservation area. According to this, in the logical overwrite method, the current recording type of the DFL input is the CRD input type. The type of CRD input will be described in detail with reference to the accompanying drawings. Figure 4 illustrates a method for recording overwriting management information in accordance with the present invention. Referring to figure 4, as described above, according to an overwriting command of the server when the user requests it, if the data is overwritten in the original recording area, the data is recorded in the reserved area. In this case the necessary overwrite management information is treated as the CRD type of consecutive defective groupings. In other words for the CRD type of consecutive faulty groupings, the management information recorded in the TDM can be represented by using two DFL entries. As shown in Figure 4, for an entry, the information about its performed replacement recording is recorded in a "State 1" field as information in the DFL entry type. For example, the information on whether the replacement recording refers to the DFL entry of the type RAD or CRD type, in which the replacement recording is normally completed for a defective area when the information is "0000". When the information is "0001" the information refers to the DFL entry of type ND, in which no replacement area is indicated to replace the recordings of a defective area. The location of the information of a defective grouping is recorded as a first PSN of the corresponding grouping. Information about a type and attribute of each of the DFL entries is recorded in the "status" field along with the "status 1" field. For example when the information is "0000", the information means that there is a defective area in a cluster. When the information is "0001" it means a start of the plurality of consecutive defective groupings. And when the information is "0010", the information means one end of the plurality of consecutive defective groupings. And when the information is "00010", the information means one end of the plurality of consecutive defective groupings.

The location information of the reserved area, in which the data of a defective area is recorded, is recorded in a field "First PSN of the replacement cluster". Here the location information is recorded as a first PSN of the corresponding grouping.

Also the field "state 1" and the field "state 2" represent information of each type of DFL entries using another input. Especially "0010" is grained in the "state 2" field of the second entry to report the end of a plurality of consecutive defective groupings and the replacement cluster. A first PSN of a final grouping of the location information in the defective cluster is recorded in a field "first PSN of the defective cluster". A first PSN of an extreme grouping of the location information of the reserved area replacement area, in which the data of the defective area is recorded, is recorded in a "first PSN of the pool" field. Here, the input consists of eight bytes (sixty-four bits). Four bits are provided for each of the "state" fields. The example of Figure 4 shows the method for overwriting data using the input format having the above structure according to the present invention will now be described. "0000" is recorded in a "state 1" field of the first input (DFL 1 input) to represent the replacement recording. A first PSN "a" from the faulty pool is recorded in the "first PSN of the faulty pool" field. Also "0001" is recorded in a "state 2" field of the first entry (DFL entry 1) to represent a start of the consecutive defective groupings. A first PSN "c" from a location in the replacement area of the reserved area, in which data from the defective area is recorded in a "first replacement pool PSN" field. In addition "0000" is recorded in a "state 1" field of a second input (DFL 2 input) to represent that the replacement recording is performed. A first PSN "b" of a final grouping of the defective groupings is recorded in the field "first PSN of the defective cluster". Also "0010" is recorded in a "state 2" field of the second input (DFL 2 input) to represent an ending; of consecutive defective groupings. A first PSN "d" of the extreme cluster of a location in the area of replacement of the reserved area, in which the data of the defective area is recorded, is recorded in a field "first PSN of replacement cluster". According to this, when the server wishes to reproduce the data in area a-b when the user requests it, the unit will reproduce the data in the area c-d referring to the information recorded in the TDMA. Meanwhile, in the method for representing management information in an overwrite using two DFL inputs (DFL input 1 and DFL input 2), the two DFL inputs are commonly called "CRD inputs". Figures 5A and 5B illustrate an overwriting method according to one embodiment of the present invention. Figures 5A and 5B illustrate a particular overwrite method according to an overwrite command of a user or a server. First, as shown in FIG. 5A, when an overwrite command for overwriting in a previously recorded area of a write-once optical disk is transmitted to a unit when requested by the user or the server, the unit records , in a reserved area, the data that will be recorded in the previously recorded area. Here the overwriting command is transmitted including information about a location to record data on the optical disk (start position and sector unit) (for example xl, x2, x3, ..) and the data size (length and grouping unit) (for example ml, m2, m3, ..). As shown in Figure 5A, the writing commands can be transmitted continuously. The Wl command of the continuously transmitted writing commands commands the recording data on the disk in place xl by the grouping ml. However, since the location XI is a previously recorded area (or an original recorded area), a recording data of the optical disk unit in the disk from the location Yl within an area reserved by the grouping ml. For the Wl command, as shown in FIG. 4, the disk records the CRD 1 entry as a management information in the replacement recording of the overwrite command in a TDFL defect list included in the TDMA area. Here the input CRD 1 is represented by two inputs DFL. "0000" is recorded in the "status 1" field of the DFL entry 1. "XI" is recorded in the "first PSN of the faulty grouping" field. ??? i "is recorded in the" state 1"field of the DFL entry 1. Also" 0000"is recorded in the" status 1"field of the DFL entry 2." X2-32"is recorded in the field "first PSN of the defective grouping." Here the "X2-32" is recorded as described above because the location information is the first PSN of a final faulty grouping, in other words since a grouping consists of thirty-two sectors, a superior PSN of a neighboring grouping deviates from X2 by thirty-two sectors in the direction If a grouping consists of sixteen sectors, a superior PSN of a neighboring grouping deviates from X2 by sixteen sectors in the direction Additionally "0010" it is recorded in the field "status 2" of the DFL entry 2. "Y2-32" is recorded in the field "first PSN of the replacement grouping". Similarly, for the W2 and W3 command, the CRD 2 input and the CRD 3 input are generated sectors, the unit records (or updates) the CRD 2 input and the CRD input 3 in a list of TDFL defects or the TDMA area such that the optical disk has management information in the replacement area. However, if the data recorded according to the overwriting command is consecutive to each other as described above, the consecutive data is compressed into a CRD input to record the compressed data on the optical disk, which will now be described in detail with reference to figure 5B. The table shown in Figure 5B is a table of CRD inputs of a mode according to the present invention of Figure 5A. Referring to Figure 5B, the CRD input generated according to the write commands Wl, W2 and W3 includes information on the consecutive groupings. In other words, a grouping represented by a CDR entry 1 is adjacent to a grouping represented by a CDR entry 2, and the grouping represented by the CDR entry 2 is adjacent to the grouping represented by a CRD entry 3. According to this invention, if the data recorded according to the overwriting command is consecutive, the location information in the initial and final groupings is represented using a CRD input. To accomplish this an optical disk drive temporarily stores consecutive write commands in this included memory and records the management information in a single step. In other words, the replacement recording is performed according to each overwrite command, the generated CRD input is stored not on the optical disc but on the included memory of the unit. The CRD input is searched, and the entries that include information on consecutive groupings are reduced at one input and recorded on the optical disk such that the TDMA area can be used efficiently. Referring to Figure 5B, the replacement recordings are made thanks to the overwriting commands Wl, W2 and W3 since CRD1, CRD2 and CRD3 that are generated by the administration information are consecutive to each other, the CRD input finally recorded in the TDMA area of the optical disk represents the location information in the first and last consecutive groupings in the overwriting area and in the first and last groupings in the replacement area using two DFL inputs. According to this "0000" is granated in a "state 1" field of a first DFL entry. "XI" is recorded in the field "first PSN of the defective cluster". "0001" is recorded in a "status 2" field of the first DFL entry. "Yl" is recorded in the field "first PSN of the replacement pool." 0000"is recorded in a" state 1"field of a second DFL entry." X4-32"is recorded in the" First PSN of pool "field defective "." 0010"is recorded in a" state 2"field of the second DFL input." Y4-32"is recorded in a" first replacement grouping PSN "field. not only the administration information generated by an overwriting command but also the actual data in its included memory and record the administration information and the data at one time if the data is consecutive Several modalities can be implemented in accordance with the memory capacity included Figure 6 illustrates administration information based on various overwriting formats according to the present invention, such as a method for recording a CRD input.The optical disk of (a) illustrates an area Original recorded on a disc or optical single-write. Referring now to (a) of Figure 5, a defective area can be included in the original recorded area of the optical disc. Management information for the defective area is recorded as an entry in the TDMA area within the optical disk, which is referred to particularly as a type of defect (RAD) reassigned. More specifically, in the RAD type entry, the defective area is formed based on a grouping. Accordingly, when overwriting is performed in the original recorded area including the defective area by a request made by the user or the server, the data to be overwritten is recorded by replacement in a reserved area of the disk optical, regardless of the management information of the defective area and if the recording has been made. Therefore seven (7) defective entries to represent the information (for example the RAD type entry) in the first seven (7) defective areas in the TDMA area of the optical disc are recorded as six (6) defective entries including the information of administration of the ab area, which is the overwriting area. More specifically, since three (3) entries for each of the defective areas D originally included in area a-b are already included in area a-b, all three entries are excluded when the CRD-type input is recorded to manage area a-b. More particularly, this is to ensure that the CRD type input, which is formed of two pairs, is continuously recorded. In other words, when the entry is recorded in the TDMA area, the entries are classified in a specific order (for example, the order of "state 1" and "the first PSN field of defective grouping" within the entries). Therefore, if there are three inputs for each of the defective areas D are not excluded, the CRD type input can not be recorded continuously. The optical disk of (b) illustrates an example of a portion of the overwritten area (area ab) that is being overwritten again (area cd) by using method (a) of figure 5. Referring to (b) ) of figure 6, when the data is overwritten again in the area that includes the overwritten area (area ab) to the request made by the user or the server, the information that will be recorded in the area cd is recorded in the replacement area on the optical disk, as shown in (a) of Figure 6. (c) of Figure 6 illustrates a final formatted recording of the optical disk. The defective input for managing the recording format shown in (c) in Figure 56 includes four (4) RAD type inputs, one CRD type input for area a-c, and one CRD type input for area c-d. Accordingly, each of the CRD-type inputs consists of (2) pairs of inputs, and thus a total of eight (8) defective inputs are included here. Figure 7 illustrates a format in which management information is recorded in accordance with the present invention. Figure 7 illustrates a TDFL format included in a TDMA area and a defect list format in TDFL. As shown in Figure 7, the TDFL including in a TDMA area includes a defect list header, a plurality of defect lists, and a defect list terminator that concludes the defect list. The defect list header includes information about the defect list and a configuration of the defect list. The plurality of defect lists include a list of the groupings that have been determined to be defective while the disk is being used. The terminator of the defect list concludes the list of defects. Additionally the header of the defect list includes a field "DFL identifier", a "field of" number of DFL entries "(N_DFL), a field" Number of FAD / CRD inputs "and a field" Number of entries NRD / DND. "The" DFL identifier "field represents the ID information that identifies a defect list The" Number of DFL entries "field (N_DFL) represents the total number of defect list entries The field" Number of FAD entries / CRD "represents the number of types RAD and CRD The field" Number of entries NRD / CND "represents the number of types NRD and CND.In other words, the total number -of entries DFL is recorded in the "Number of DFL entries" field (N_DFL). The aggregate number of type RAD type inputs and the CRD type inputs is recorded in the "Number of FAD / CRD inputs" field. The aggregate number of NRD type inputs and CND type inputs are recorded in the "FAD / CRD number" field. (Here the overwrite is processed in the CRD type). Also the defect list includes a plurality of DFL entries including information about the actual defective grouping. The entire size of the TDFL may vary according to the information included in the defect list and may also be extended. The full size of TDFL does not exceed four (4) groupings for a single layer disc and does not exceed eight (8) groupings for a double layer disc.

Figure 8 illustrates a block diagram of an optical recording and / or reproducing apparatus. Referring to Figure 8, the optical recording and / or reproducing apparatus 10 and a server or control 20. The optical recording and / or reproducing apparatus 10 records and reproduces the data on the optical disc. The server or controller 20 controls the recording and / or reproduction apparatus 10 and transmits a write command and a playback command to the recording and / or reproduction apparatus 10 for a spec area. The recording and / or reproducing apparatus 10 records and reproduces data for a spec area according to the command of the controller 20. Here the recording and / or reproducing apparatus 10 includes an interface unit 12, a pick-up unit 11, a data processor 13, a servo unit 14, a memory 15 and a microcomputer 16. The interface unit 12 communicates data and a command to the controller 20. The capture unit 11 records or reads data on the optical disk. The data processor 13 receives a signal read from the pickup unit 11 and recovers a desired signal value or modulates the signal to be recorded in the signal to be recorded on the optical disc and transmits the modulated signal. The servo unit 14 controls the pick-up unit 11 to read or accurately record a signal on the optical disc. The memory 15 stores data and various types of information including the administration information temporarily. The microcomputer 16 controls the components in the recording / playback device 10. In the recording and / or playback device 10 configured above, the recording process of the write-once optical disc will now be described in detail. When the single write optical disc is inserted once into the optical recording and / or reproducing apparatus, all the administration information on the optical disc is read and stored in a memory of the recording and / or reproduction device 10. The Administration information is used to record and reproduce the data on the optical disc. In this state, when a user wishes to record data in a spec area of the optical disc, the controller 20 transmits the location information and the data to be recorded in the recording / playback device 10. Here the microcomputer 16 of the recording and / or playback 10 receives the write command. Then the microcomputer 16 determines whether the area of the optical disk in which the controller 20 wants to record data is a defective area and if the data has been completely recorded from the management information stored in the memory 15.

And finally, the microcomputer 16 records the data in an area that is not the defective area and in the previously recorded area according to a write command of the controller 20. In the recording data described above, when the overwrite must be performed at the request of the user, the data to be recorded in the overwriting area is recorded in another area (this is the reserved area) in the data area. The related information that includes the generated CRD input is temporarily stored in the memory 14 of the recording / playback device 10. Then the input Stored CDT is verd (or searched), and entries that include information on consecutive grouping are reduced by a CRD entry. The information is recorded in the DFL input of TDFL in TDMA on the optical disc. Here the microcomputer 16 transmits the location information of the replacement area and the data to the servo 14 and the data processor 13, and then completes the replacement recording or recording at the desired location of the disk through the pickup unit 11. The process of recording the single-write optical disc according to the present invention will be described later in detail. When the single-write optical disc is first inserted once into the optical recording and / or reproducing apparatus. All administration information on the optical disc is read and stored in the memory 15 of the recording / reproduction device 10. The administration information is used to record and reproduce the data on the optical disc. In this state, when a user wishes to reproduce the data in a specific area of the optical disc, the controller 20 transmits the location information and the data to be recorded in the recording / reproduction device 10. Here the microcomputer 16 of the recording / reproduction device 10 receives the playback command, determines whether the data in the area of the optical disk that the controller 20 wants to reproduce is recorded in another area in the data area and the location of the defective area, if the data has not been displayed. This can be verified with the DFL entry of the TDFL in the TDMA area described above. Accordingly, if the data in the area that the controller 20 wants to reproduce is not recorded in the reserved area, the microcomputer 16 reproduces the data in the corresponding area and transmits the reproduced information to the controller 20. If the data in the area the controller 20 wants to reproduce is recorded in the reserved area for example the RAD / CRD type), the microcomputer 16 reproduces the data in the corresponding reserved area and transmits the reproduced information to the controller 20. It will be apparent to those skilled in the art that several Modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention with the proviso that they fall within the scope of the appended claims or their equivalents. INDUSTRIAL APPLICABILITY The present invention provides a method and apparatus for overwriting data in a single-write optical disk according to the present invention, in which the write-once optical disk can be more efficient to manage and reproduce by suggesting an efficient method of administering DFL inputs, by continuously overwriting the data in the previously recorded area of the optical disk.

Claims (18)

1. CLAIMS 1. A method for overwriting data in a write-once recording medium, the method being that: when a plurality of data recording commands are received for a previously recorded area within the recording medium, the recording of replacing the received data for each recording command in an area not recorded within the recording medium, and when the plurality of recording commands are executed in a continuous area within the recording medium, the data is poured into the recording area. administration within the recording medium as administration information for the plurality of recording commands. The method of claim 1, further comprising: temporarily storing management information for each replacement recording of the data according to each recording command in a memory. The method of claim 1, wherein the administration information is a consecutive re-assigned faulty (CRD) entry. The method of claim 3, wherein the CRD input is recorded in a temporary disk management area (TDMA) within the recording medium. 5. The method of claim 3, wherein the CDR entry presents location information of an initial grouping and a final grouping in an area of continuous data overwriting, and a location information of an initial grouping and a final grouping into a replacement area. 6. The method of claim 5, wherein the location information is presented as a first physical sector number of the groupings. The method of claim 3, wherein the CRD input is formed from a pair of two inputs. The method of claim 7, wherein between the two inputs a first physical sector number of an initial pool in an overwriting area is recorded in a "first PSN of the defective pool" field of a first entry. The method of claim 7, wherein between the two inputs a first physical sector number of a final grouping in an overwriting area is recorded in a "first PSN of the faulty grouping" field of a first entry. The method of claim 7, wherein between the two inputs a first physical sector number of an initial grouping in a replacement area is recorded in a "first PSN of the replacement grouping" field of a second entry. The method of claim 7, wherein between the two inputs a first physical sector number of a final grouping in a replacement area is recorded in a "first PSN of the replacement pool" field of a second entry. The method of claim 7, wherein the entry presents a "state" field as information to differentiate a type and property of each entry. The method of claim 1, wherein the administration information presents a location information of the overwriting area and the replacement area. 14. A method for overwriting data in a write-once recording medium, the method being that during the reception of a data recording command for the area previously recorded within the recording medium, recording by replacement the data received for the recording command in an area not recorded within the recording medium, and record a location information of the previous recording area and a replacement area such as at least one registration in a management area, and record data while An inscription of a defective area existing within the recorded area is excluded. 15. The method of claim 14 in which - when the data requested by the recording command is formed by a plurality of continuous groupings, the at least one input records the location information of the previously recorded area and the replacement area is formed of two pairs of tickets. 16. An apparatus for overwriting data in a write-once recording medium, the apparatus consists of: a memory for temporarily storing an administration information in accordance with a replacement recording; and a microcomputer replacement recording of the data received for each recording command in an area not recorded within the recording medium, upon receiving a plurality of data recording commands for a previously recorded area within the recording medium, temporarily storing the administration information in accordance with the replacement recording for each recording channel, and controlling the administration information as an entry to be recorded in an administration area within the recording medium, when there is a continuity between the administration information according to the command and recording for each recording command stored in the memory. 17. An apparatus for overwriting data in a write-once recording medium, the apparatus consists of: a recording unit that records data and administration information on the recording medium, and a replacement recording by microcomputer that records the data received for the recording command in an area not recorded within the recording medium, upon receipt of a data recording command for a previously recorded area within the recording medium, recording location information of the previously recorded area and a replacement area as at least one inscription in a previously recorded area and a replacement area as at least one inscription in a management area, and controlling the collection unit in such a way that when the data is recorded while excluding an inscription from a defective area existing within the previously recorded area. 18. A recording medium, which includes a data area that includes a replacement area that replaces a previously recorded area according to a recording command for the previously recorded area within the recording medium and a temporary disk management area which records the location information of the previously recorded area and the replacement area as two pairs of inscriptions, where when the two pairs of inscriptions are recorded in the previously recorded area, the data is recorded while excluding an entry from an area defective within the previously recorded area.