JP4269942B2 - Recording medium, recording apparatus, and reproducing apparatus - Google Patents

Description

  The present invention relates to a recording medium, a recording technique for recording information on the information recording medium, and a reproducing technique for reading information from the information recording medium again.

  An example of a system for recording and reproducing digital data from an information recording medium is an optical disk recording / reproducing system such as a CD or a DVD. The configuration of the optical disk recording / reproducing system and the recording / reproducing operation will be described with reference to FIGS. FIG. 3 shows the configuration of the optical disc recording / reproducing apparatus. Light emitted from a laser light source 25 that is a part of the optical head 2 (wavelength of about 650 nm for DVD) is collimated into a substantially parallel light beam 22 through a collimator lens 24. The light beam 22 is irradiated onto the optical disk 11 through the objective lens 23 to form a spot 21, and then guided to the servo detector 26 and the signal detector 27 through the beam splitter 28 and the hologram element 29. Signals from each detector are added and subtracted to become servo signals such as tracking error signals and focus error signals, and are input to the servo circuit. The servo circuit controls the position of the driving means 31 of the objective lens 23 and the entire optical head 2 based on the obtained tracking error signal and focus error signal, and positions the position of the light spot 21 in the target recording / reproducing area. The addition signal of the detector 27 is input to the signal reproduction block 41. The input signal is digitized after being filtered and frequency equalized by a signal processing circuit. The digitized digital signal is processed by an address detection circuit and a demodulation circuit. Based on the address signal detected by the address detection circuit, the microprocessor calculates the position of the light spot 21 on the optical disk 11 and controls the automatic position control means to control the optical head 2 and the light spot 21 for the desired data recording. Position to area.

  When the instruction from the host device to the optical disk recording / playback device is recording, the microprocessor receives user information from the host device and stores it in the memory, and controls the automatic position control means to control the light spot 21 for the target recording. Position to area. The microprocessor confirms that the light spot 21 is normally positioned in the recording area based on the address signal from the signal reproducing block 41, and then controls the laser driver and records the user information in the memory in the target area. .

  As shown in FIG. 6, the address signal is arranged for each information recording unit area and is arranged at the head of the recording unit area, so that the position of the light spot is detected immediately before recording by detecting the address signal. Can be confirmed.

  FIG. 5 shows an example of the operation of an optical recording / reproducing system that drives a DVD-RAM disc defined in the international standard ISO / IEC-16824, which is a rewritable DVD, as an example of the optical recording system described above. .

  When a disc is inserted or the power of the optical recording system is turned on, the optical recording system first performs processing for determining the type of medium. Usually, in addition to the DVD-RAM medium, it has a reproduction function of a CD-ROM or DVD-ROM which is a reproduction-only medium. For this reason, the optical recording system first performs a medium type determination process to determine which of the above media is used. This method of discrimination processing differs depending on each system. For example, in some systems, the type of medium is discriminated from the analog characteristics of a reproduction signal such as reflectance and focus error signal. After reproducing the medium physical information holding area provided on the disk, the contents (data) of the medium are Some discriminate the type.

  When the optical recording system recognizes that the type of the medium is a rewritable type, that is, a DVD-RAM, first, the recording content such as the defect management information area is inspected to determine whether or not the optical disc has been physically formatted. If it is not physically formatted, it waits until a physical format instruction is received from a host device or a user.

  When the optical disc has been physically formatted, the optical recording system waits for instructions from the user or the host device after performing recording preparation processing such as calibration processing and logical consistency verification. When any command is received, the optical recording system checks the type of command, and if it is a recording command, performs recording processing of user information. In the case of commands such as playback, formatting, and ejecting a disc, corresponding processing is performed. Normally, these processes end normally, but in the unlikely event that recording fails due to an unexpected reason, error processing such as retry or replacement processing is performed.

  In the case of a normal DVD-RAM, at the time of this recording process, whether or not the user information is normally recorded is actually reproduced and confirmed, and if necessary, a replacement process using another recording unit area is performed. , Improving the reliability of user information on the medium. Management information relating to the reallocation of the recording area by the replacement process is recorded in a special area (defect management area, spare area) on the recording medium.

  As described above, the DVD-RAM is a very reliable optical recording system.

  Further, in an information recording / reproducing apparatus that handles a rewritable information recording medium such as a DVD-RAM as an information recording medium that can be recorded only once, a sector flag area is provided outside the user information area of the medium, and each sector is provided in this area. JP-A-4-3368 discloses a means for recording a flag indicating a state and managing whether each sector of the user information area has been recorded or not recorded. In this publication, when an information recording / reproducing apparatus receives a user information recording instruction from a host apparatus, the information recording / reproducing apparatus reads information in the sector flag area and confirms that all sectors in the recording instruction range are unrecorded. Since then, a method for preventing overwriting on a recorded sector by using means for recording on an information recording medium has been proposed.

  Further, as a method of using a write-once information recording medium such as a CD-R or DVD-R having a recording area that can be recorded only once, the user information is mainly used for backup, and from the inner periphery to the outer periphery of the user information area. A system called the Disc At Once system in which user information is continuously recorded (from the outer periphery to the inner periphery depending on the recording medium), and then the user information is not recorded again after the information recording medium is taken out from the information recording / reproducing apparatus. Is commonly used.

  As a method for managing a recorded area on a recording medium, a recording apparatus of a rewritable disc-shaped recording medium including a user area in which user information is recorded in Patent Document 1 and a management data area. There is a description of a recording apparatus that creates a bitmap composed of bits indicating whether recording has been performed or not, and records the bitmap in a management data area of a disk-shaped recording medium.

Japanese Patent Laid-Open No. 11-86418

  As described above, in a rewritable recording medium that can be overwritten in the past, error processing by retry or replacement processing or user information received from a higher-level device can be stored on any recording medium regardless of whether it is an unrecorded part or a recorded part. A writing method of arranging at a position is realized. However, these functions have not been realized in a write-once recording medium such as a CD-R or DVD-R, which has become increasingly popular in recent years, and which is most widely used as a recording medium and cannot be physically overwritten. . It is an object of the present invention to use a write-once recording medium in the same way as a rewritable recording medium with almost no change in hardware or physical specifications, that is, to receive user information received from a host device regardless of the state of the recording area. Another object of the present invention is to provide a digital data recording / reproducing method for performing recording / reproduction without destroying or erasing the recorded information.

  Further, in Japanese Patent Application No. 9-250712, for a write-once optical disc, the recording device receives a recording request from the host device, and the requested address is a recorded region from the recording region management information by the bitmap. There is no description of the operation of the device when it is found out.

The above problem can be solved by, for example, the invention described in the claims.

  By using the present invention, a write-once optical disc that cannot be physically overwritten can be logically overwritten, and a host device can handle a write-once optical disc in the same manner as a rewritable optical disc. In addition, the overwrite spare area provided for realizing the logical overwrite can be freely set in size, and the overwrite area management table is recorded in this area, so that the capacity of the write-once optical disk can be used efficiently in the disk usage method. Is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In order to indicate the state of the area, “recorded area”, “recorded area”, and “unrecorded area” are used. The meanings are “an area where data will be recorded next”, “an area where data has already been recorded”, and “an area where data has not yet been recorded”.

  Further, in the diagram showing the disk arrangement frequently used in the embodiment of the present invention, “area indicated by diagonal lines drawn from lower left to upper right” indicates a recorded area, and “area indicated by diagonal lines drawn from upper left to lower right” In the description, an area that has been designated as a recording area from an unrecorded area is shown as a recorded area, "blacked out area" indicates a recorded area and a recorded area, and "outlined area" indicates an unrecorded area Or an area not directly related to the explanation for the figure. Also, for convenience of explanation, addresses on the disc are allocated so as to increase from the inner circumference to the outer circumference of the disc, and continuous user information is recorded in ascending order of addresses, that is, user information is recorded from the inner circumference to the outer circumference of the disc. Suppose that it is recorded towards. In order to further simplify the description, LBA (n) is indicated to indicate a logical address and PBA (N) is indicated to indicate a physical address, but LBA (n) and PBA (N) are actual optical disk recordings. In the playback device, a plurality of addresses, for example, LBA (n) corresponds to 16 addresses from LBA (a) to LBA (a + 15).

  FIG. 2 shows an arrangement of data on an optical disk used for explaining the present invention. Here, the present invention will be described based on the data arrangement of FIG. 2, but the essence of the present invention does not depend on the data arrangement.

  FIG. 2 is a data area arrangement diagram of the optical disk.

  In write-once and rewritable CDs and DVDs, physical addresses indicating positions on the disk are assigned to the entire surface of the disk using wobbles and prepits. When formatting a disc according to the intended use, the CD / DVD recording device divides the disc area according to the purpose of use by using this physical address, and assigns this area definition information, that is, the physical address B from the physical address A to the user. Information such as the use of the area, physical address C to physical address D as a spare area is recorded at a predetermined position in the lead-in where the recording device mainly records management information of each disk. Also, in an optical disc recording / reproducing system in which a physical address is not allocated to a disc unlike CD and DVD, temporary data including address information is continuously arranged on the entire surface of the disc when the recording device formats the disc. Similarly, by recording the area definition information at a predetermined position in the lead-in using the address information, the disk can be divided into areas according to the purpose of use.

  The optical disk used in this explanation cannot be used because of the spare area management header, the lead-in having the spare area management table from the inner periphery to the outer periphery of the disc, scratches, fingerprints, recording film deterioration due to repeated overwriting, etc. A spare area used as a substitute area for a part of the lowered user area (this area is called a defect), a user area for recording user information, and a lead-out are arranged. Also, a logical address (LBA) is provided in an area that can be freely accessed from the host device, and this address is associated only with the user area. Therefore, the size recognized by the host device as the disk capacity is equal to the size of the user area, the disk capacity becomes a constant value after initialization, and matches the sum of the recorded area and unrecorded area of the user area regardless of the presence or absence of defects. .

  Next, a general process when a defect occurs, which is performed on a rewritable optical disk such as a DVD-RAM, will be described with reference to FIG.

  In response to the instruction “record user information (N) in LBA (n)” from the host device, the drive, which is a kind of optical disk recording / playback device, stores the user information (N) from the host device in the memory, Data (N) modulated from user information (N) is recorded at a physical address (PBA (a)) in the user area corresponding to (n). After that, the drive reads out the data (N) recorded in the user area from the disk, demodulates it, and compares it with the user information (N) stored in the memory or corrects the error obtained by the modulation process. Check the number of. At this time, if the number of errors included in the reproduction data satisfies the specified defect recognition condition, the user area PBA (a) in which the data is recorded is handled as a defect. If it is determined that PBA (a) is a defect, information such as the head position and size of a valid spare area management table is checked from the spare area management header arranged in the lead-in. Next, a PBA that can be newly used as a defect replacement area in the spare area is searched from the spare area management table indicated in the spare area management header. The user information (N) stored in the memory is rewritten in the recording area in the spare area determined in this manner, and the recorded data is reproduced and the confirmation of whether or not the defect qualification condition is satisfied is the same as the work performed in the user area. When it is determined that it is not necessary to handle as a defect, the PBA (a) in the user area corresponding to LBA (n) is replaced with the PBA (b) in the spare area, in other words, LBA (n ) To indicate that PBA (b) (in the spare area) corresponds to “PBA (a) has a defect” and “PBA (b) instead of PBA (a)” in the spare area management table. Address correspondence information such as “used” or “the physical address corresponding to LBA (n) is PBA (b)” is registered. Finally, as the address correspondence information and position of the spare area management table are updated, the information of the spare area management table included in the spare area management header is also updated.

  Therefore, defect management performed on an optical disk such as a DVD-RAM is designed so that the number of LBAs, that is, the recording capacity does not change even when a defect occurs by providing a spare area separately from the user area. ing.

  The above is the defect management method performed in the conventional rewritable optical disk. In this way, after data recording, reproduction is performed and defect determination is performed, which is called read after write (RAW). The defect determination is not limited to RAW, but may be performed during normal data reproduction.

  FIG. 7 is a diagram showing the arrangement of the spare area management header and spare area management table included in the lead-in in FIG. Every time the spare area management header and the spare area management table are updated, all information necessary for the spare area management is updated, and the spare area management header and the spare area management table are divided into a spare area management header recording area and a spare area management table recording area, respectively. Therefore, only the last updated spare area management header and spare area management table are valid information, and the spare area management header and spare area management table recorded before that are not particularly necessary information. In each area, the spare area management header and the spare area management table are cyclically recorded in order to secure the number of recording updates. In other words, the spare area management header is added from the inside to the outside in the spare area management header recording area. When the recorded spare area management header reaches the outermost circumference of the spare area management header recording area, the innermost circumference of the area is again assigned to the next recording area. In this case, the spare area management header is provided with a counter value that is counted up every time it is updated for detection of the latest spare area management header, and an address pointer that points to the latest spare area management table.

  Therefore, the drive arbitrarily reads the spare area management header in the spare area management header recording area, compares the counter values included in each, and finds a valid spare area management header having the maximum counter value. By finding an effective spare area management table from the address pointer included in the spare area management header, it is possible to know the usage status of the spare area on the optical disk.

  Next, a data recording process performed on a rewritable optical disk such as a DVD-RAM will be briefly described with reference to FIGS.

  FIG. 8 is a diagram illustrating a data recording process when the upper apparatus sets a recording area in an unrecorded area.

  FIG. 9 is a diagram showing a data recording process, that is, an overwrite process, when the upper apparatus sets a recording area in the recorded area.

  In response to the instruction “record user information (N) in LBA (n)” from the host device, the drive stores the user information (N) from the host device in the memory, and then the user area corresponding to LBA (n). The data (N) modulated from the user information (N) is recorded in the physical address (PBA (a)). All information related to data recorded and arranged on the user area on the optical disc is managed by the host device. Usually, the host device records the file management information data relating to the file name of the file recorded on the user area and the recording position using the LBA on the user area separately from the file. Therefore, when a new file is recorded on the user area, the host device adds the file management information data related to this file at the same time, and deletes the file management information data related to this file when the file is deleted. ing. However, when this operation is viewed from the drive, there is no difference between the file and the file management information data, so the drive operates by interpreting it as the same user information.

  Next, a description will be given of a method in which the defect management and overwrite recording processing performed on these rewritable optical discs are realized with a write once optical disc, that is, the host device can handle the write once optical disc as freely as the rewritable optical disc.

  Defect management in a write-once optical disc is the same as the method performed in a replaceable optical disc as long as no physical overwriting occurs in the recorded area. In other words, the same description as the defect management method for the replaceable optical disk performed with reference to FIG. 4 will be made. In response to the instruction “record user information (N) in LBA (n)” from the host device, the drive Is stored in the memory, and then the data (N) modulated from the user information (N) is recorded in the physical address (PBA (a)) in the user area corresponding to LBA (n). . After that, the drive reads out the data (N) recorded in the user area from the disk, demodulates it, and compares it with the user information (N) stored in the memory or corrects the error obtained by the modulation process. Check the number of. At this time, if the number of errors included in the reproduction data satisfies the specified defect recognition condition, the user area PBA (a) in which the data is recorded is handled as a defect. If it is determined that PBA (a) is a defect, information such as the head position and size of a valid spare area management table is checked from the spare area management header arranged in the lead-in. Next, a PBA that can be newly used as a defect replacement area in the spare area is searched from the spare area management table indicated in the spare area management header. Whether the user information (N) stored in the memory is rewritten to the PBA (b) in the spare area determined in this way, and the recorded data is reproduced and the defect qualification condition is satisfied as in the work performed in the user area Is confirmed. However, if it is determined that the replacement area PBA (b) in the spare area is defective, the user information (N) in the memory is recorded again in PBA (c) which is the next defect replacement area of PBA (b). Playback, defect determination processing. If it is determined that there is no need to handle it as a defect, PBA (a) in the user area corresponding to LBA (n) has been replaced with PBA (c) in the spare area, in other words, LBA (n). To indicate that PBA (c) (in the spare area) corresponds, “PBA (a) has a defect” in the spare area management table and “PBA (c) is used instead of PBA (a)” Address correspondence information such as “the physical address corresponding to LBA (n) is PBA (c)” and address correspondence information such as “PBA (b) (in spare area) has a defect”. sign up. Finally, as the information and position of the spare area management table are updated, the information of the spare area management table included in the spare area management header is also updated.

  FIG. 10 shows the structure of the address correspondence information constituting the spare area management table.

  In this figure, the table located at the top in the figure shows the address correspondence information created when the defect processing as shown in the data layout diagram of the two write-once optical disks located at the bottom occurs. The address correspondence information includes “PBA determined to be a defect” in the user area, “PBA used for substitution” in the corresponding spare area, and two types of flags. Similarly, the address correspondence information can be managed as “LBA” and “PBA corresponding to it”. Of these two types of flags, flag 1 indicates the validity of the address correspondence information, and flag 2 indicates a valid data range in the PBA used as a substitute. For example, in an optical disk such as a DVD-RAM, the minimum data unit that can be recorded on the optical disk by the drive is 32 kbytes. Therefore, “PBA determined to be defective” included in the address correspondence information and “ “PBA used for substitution” indicates that data replacement is performed in units of 32 kbytes in principle. However, since the data unit used in the recording request from the host device is 2 kbytes, the reproduction error of the existing user information that occurred when the user information less than 32 k was overwritten in the recorded area (the data less than 32 k) When overwriting, the existing user information is reproduced from the optical disk in units of 32 kbytes, overwritten with new user information on the memory in the drive, subjected to predetermined demodulation processing, and then recorded again at the same address. In this situation, address translation in units of 2 kbytes is required. Therefore, address partial correspondence information such as which 2 kbytes of the 2 kbytes of user information obtained by dividing the 32 kbytes into 16 using flag 2 is included in the 32 kbytes of user information indicated by the PBA used as an alternative. To express. For example, if only the 3rd to 5th user information in the 1st to 16th 2k bytes is included in the 32k bytes in the spare area, it represents the position of 2k bytes replaced with 0 and a numerical value such as C7FFh, The first position and the last position where the replacement is started are represented by numerical values, and a numerical value such as 24h is used as the flag 2. Since this read-modify-write process is also applied in the spare area, this process is also applied to defects occurring in the spare area. For this reason, the flag 1 is used to indicate that a part of the data (a multiple of 2 kbytes) is included in the PBA used for other alternatives. For example, in a situation where address correspondence information such as “user information of PBA (N) determined to be a defect (corresponding to LBA (n)) is recorded in PBA (M)” exists, LBA (n ), When the drive is unable to reproduce the existing user information from the PBA (M), the PBA (L) Only the user information at the 8th 2k byte position of LBA (n) is recorded, and the user information of PBA (N) newly determined as a defect (corresponding to LBA (n) is PBA (L) Address correspondence information such as “recorded in” is added to the spare area management information. At this time, the user information of PBA (N) determined to be a defect (corresponding to LBA (n) is recorded in PBA (M)). This PBA (M) is a defect in the flag 1 of the address correspondence information. "1" or "0" meaning that is added. By using these flag information, it becomes possible for the drive to obtain information on where user information is stored in units of 2 kbytes. Further, without using flag 1, the user information of PBA (N) determined to be a defect (corresponding to LBA (n)) is recorded in PBA (M). This indicates that the 7th and 9th to 16th 2k bytes are the target, and “the user information of PBA (N) determined to be a defect (corresponding to LBA (n)) is PBA (M) It is also possible to obtain the same information by indicating that the 8k 2k byte is the target in the flag 2 of the address correspondence information recorded in the “2”.

FIG. 7 is a diagram showing the arrangement of the spare area management header and spare area management table included in the lead-in in FIG. Every time the spare area management header and the spare area management table are updated, all information necessary for the spare area management is updated, and the spare area management header and the spare area management table are divided into a spare area management header recording area and a spare area management table recording area, respectively. Therefore, only the last updated spare area management header and spare area management table are valid information, and the spare area management header and spare area management table recorded before that are not particularly necessary information. In each area, the spare area management header and the spare area management table are cyclically recorded in order to secure the number of recording updates. In other words, the spare area management header is added from the inside to the outside in the spare area management header recording area. When the recorded spare area management header reaches the outermost circumference of the spare area management header recording area, the innermost circumference of the area is again assigned to the next recording area. In this case, the spare area management header is provided with a counter value that is counted up every time it is updated for detection of the latest spare area management header, and an address pointer that points to the latest spare area management table.
Therefore, the drive arbitrarily reads the spare area management header in the spare area management header recording area, compares the counter values included in each, and finds a valid spare area management header having the maximum counter value. By finding an effective spare area management table from the address pointer included in the spare area management header, it is possible to know the usage status of the spare area on the optical disk. Since the write-once optical disc cannot overwrite the recorded area, it is necessary to reduce the number of times the spare area management header and the spare area management table are updated. Therefore, the drive needs to reduce the timing of updating information using the internal memory, and ensure the size of the spare area management header recording area and the spare area management table recording area.

From this, it can be seen that even a write-once optical disc can be applied in the same manner as a rewritable optical disc if a sufficient defect management area can be secured.
Next, a data recording process performed on the write-once optical disc will be described with reference to FIG. 8, and an overwrite function of the write-once optical disc using a spare area will be described with reference to FIGS.

  FIG. 8 is a diagram illustrating a data recording process when the upper apparatus sets a recording area in an unrecorded area.

  In response to the instruction “record user information (N) in LBA (n)” from the host device, the drive stores the user information (N) from the host device in the memory, and then the user area corresponding to LBA (n). The data (N) modulated from the user information (N) is recorded in the physical address (PBA (a)). Thereafter, the drive performs RAW processing when performing defect management.

  FIG. 9 is a diagram showing a data recording process when the upper apparatus sets a recording area in the recorded area.

  In response to a command “record user information (N) in LBA (n)” from the host device, the drive uses the “recorded” physical address (PBA (a)) in the user area corresponding to LBA (n). Overwrite the modulation data of the user information (N) from the higher-level device. Thereafter, when the defect management is operated, a RAW process is performed. Therefore, the double-recorded physical address (PBA (a)) is detected as a defect by the physical characteristics of the write-once optical disc, and is shown in FIG. As described above, the user information (N) of LBA (n) is arranged in the spare area.

  Generally, a write-once optical disc, for example, a drive corresponding to a CD-R or DVD-R is equipped with an overwriting prevention function.

  There are two main methods for preventing overwriting. One is a method of performing recording after physically detecting unrecorded recording area using a reproduction signal before data recording, and the other is “recorded or not recorded” for all addresses on the optical disk. This is a method for recording and managing information indicating the recording state of “recording”.

  Therefore, in a drive equipped with an overwrite protection mechanism for a write-once optical disc, the drive is set to LBA (n) in response to a command “record user information (N) in LBA (n)” from the host device as in FIG. The reproduction processing of the physical address (PBA (a)) in the corresponding user area is performed, and it is detected from the reproduction signal that PBA (a) is “recorded”, that is, it is a defect (during recording). Therefore, the drive operates so as to place the user information (N) of LBA (n) in the spare area as shown in FIG.

FIG. 11 is an example of management information indicating the recording state of each address on the optical disc.
The user area bitmap is a sequence of bits corresponding to all addresses from the innermost address PBA (N) to the outermost PBA (N + M) in the user area, and data is recorded at an arbitrary address. Then, the recording state of each address is managed by inverting the value of the bit corresponding to the address.

  Using the management information indicating the recording state, the recording process described with reference to FIGS. 9 and 4 is the recording process illustrated in FIG. In response to a command “record user information (N) in LBA (n)” from the host device, the drive records the recording state of the physical address (PBA (a)) in the user area corresponding to LBA (n). Judging from the management information, if it is determined that PBA (a) has been recorded, PBA (a) is handled as a defect. In other words, information such as the head position and size of the effective spare area management table is checked from the spare area management header arranged in the lead-in, and the spare area management table indicated in the spare area management header is used to newly add information in the spare area. PBAs that can be used as defect replacement areas are searched. The user information (N) stored in the memory is written to the recording area in the determined spare area, the recorded data is reproduced, it is confirmed whether or not the defect qualification condition is satisfied, and it is determined that it is not necessary to handle it as a defect. In this case, the address correspondence information that the PBA (a) in the user area corresponding to the LBA (n) is replaced with the PBA (b) in the spare area is registered in the spare area management table. Then, the information of the spare area management table included in the spare area management header is updated.

  By handling the recorded area as a defect during the recording process in this way, it is possible to logically overwrite data on the write-once optical disc. However, “logical overwrite” realized by extending this defect management method limits the user information that can be overwritten to the spare area size. Despite being unrecorded, there remains a problem that the unrecorded area of the spare area disappears and the optical disk cannot be used efficiently.

  Next, a logical overwrite method for a write-once optical disc that solves this problem will be described.

  FIG. 13 is a diagram showing allocation of an area suitable for a write-once optical disc that implements logical overwrite processing.

  In addition to the conventional area shown in FIG. 4, an “overwrite spare area” as an alternative area for logical overwriting is assigned outside the logical address space. That is, when the disk is formatted, the area definition information of the spare area for overwriting using the address is recorded in the lead-in in the same manner as the user area and the spare area.

  FIG. 14 is an example of management information indicating the recording state of each address on the write-once type optical disk divided into regions in FIG.

In the user area + overwrite spare area bitmap, bits corresponding to all addresses from the innermost address PBA (N) to the outermost PBA (N + M) in the user area and the overwriting spare area are arranged. As in FIG. 11, when data is recorded at an arbitrary address, the recording state of each address is managed by inverting the bit value corresponding to that address.
When the management information indicating the recording state is used, the write-once type optical disc recording process including the overwriting spare area is as shown in FIG.

  In response to a command “record user information (N) in LBA (n)” from the host device, the drive records the recording state of the physical address (PBA (a)) in the user area corresponding to LBA (n). If it is determined from the management information and it is determined that the PBA (a) has been recorded, an unrecorded area in the overwriting spare area serving as a substitute for the PBA (a) is detected from the recording status management information, and the unrecorded area is detected. The user information (N) stored in the memory is recorded in the area, and then reproduced, and it is confirmed whether or not the defect certification condition is satisfied. If it is determined that it is not necessary to handle as a defect, address correspondence information such as PBA (a) in the user area corresponding to LBA (n) is replaced with PBA (c) in the spare area for overwrite, Registration and updating are performed in the “area management table” and “area management header” in which the spare area management table and the spare area management header are expanded so as to include the spare area for overwriting.

  If PBA (c) is determined as a defect, the effective area management table is checked from the area management header arranged in the lead-in as in the processing in the user area, and the spare area in the spare area is checked from the area management table. A new PBA usable as a defect replacement area is searched. The user information (N) stored in the memory is written to the recording area in the determined spare area, the recorded data is reproduced, it is confirmed whether or not the defect qualification condition is satisfied, and it is determined that it is not necessary to handle it as a defect. In this case, the address correspondence information that the PBA (c) in the user area corresponding to the LBA (n) is replaced with the PBA (b) in the spare area is registered in the area management table. Then, the information of the area management table included in the area management header is updated.

  However, when the logical overwrite process shown in FIG. 15 is performed on arbitrary user information, it is expected that a problem related to data transfer will occur between the drive and the host device. In other words, when user information is frequently placed in the spare area for overwriting, it takes time to move the optical head of the drive. “User information cannot be recorded continuously, that is, the user information from the host device within the required time. Cannot be received ”or“ user information cannot be reproduced continuously, that is, user information cannot be transferred to the host device within the required time ”. Therefore, by referring to the type of user information included in the command “record user information (N) in LBA (n)” from the host device, the user information is a constant data transfer between the host device and the drive such as a real-time stream. When it is necessary to guarantee the rate, the drive does not perform logical overwriting, but sends a recording error to the host device. If the user information does not need to guarantee the data transfer rate between the host device and the drive such as text data, the drive does not send a recording error to the host device and executes the logical overwriting shown in FIG.

The recording operation when the allocation of the overwrite spare area is changed while the write-once optical disc is used will be described with reference to FIGS. 16, 17, 18 and 19. FIG.
FIGS. 16 and 17 are examples in the case where the overwrite spare area is changed during the logical overwrite process. FIG. 16 shows the logical overwrite recording area after all the existing overwrite spare areas have been recorded. FIG. 17 shows the data arrangement on the optical disk when the spare area for overwriting is expanded to ensure it, and FIG. 17 shows the case where the spare area for overwriting is expanded with an unrecorded area remaining in the existing overwriting spare area Shows the data arrangement.

  In FIG. 16, in response to a command “record user information (N) in LBA (n)” from the host device, the drive has a physical address (PBA (a)) in the user area corresponding to LBA (n). It is determined from the recording state management information that it is a recorded area, and an unrecorded area in the overwriting spare area is searched from the recording state management information. At this time, when an unrecorded area including PBA (c) can be detected in the overwrite spare area, PBA (a) in the user area corresponding to LBA (n) becomes PBA (c) in the overwrite spare area. Replace and register and update the information in the “area management table” and “area management header”.

  If the unrecorded area cannot be detected in the overwriting spare area, that is, it is determined that there is no unrecorded area in the overwriting spare area, the drive transmits a recording error to the host device. At this time, the drive is expanded on the overwrite spare area, that is, allocated on the optical disk included in the area management header, in response to a command that means reassignment of the overwrite spare area from the host device or expansion of the overwrite spare area. Update the area setting information. After that, in response to the instruction “record user information (N) in LBA (n)” of the host device again, the drive stores the physical address (PBA (a)) in the user area corresponding to LBA (n). Is determined from the recording state management information, the unrecorded area in the overwriting spare area is searched from the recording state management information, and an unrecorded area including PBA (c) is detected in the overwriting spare area. PBA (a) in the user area corresponding to LBA (n) is replaced with PBA (c) in the spare area for overwriting, and the address correspondence information is registered and updated in the "area management table" and "area management header". .

  Or, the drive automatically expands the overwrite spare area, changes the area setting information in the area management header, and records the user information for LBA (n) in the unrecorded area including PBA (c) in the overwrite spare area. Thereafter, it reports to the host device that reassignment of the spare area for overwriting has been performed.

  FIG. 17 shows that the upper device expands the overwriting spare area in response to a command that means reassignment of the overwriting spare area or expansion of the overwriting spare area without a recording error from the drive, that is, an area management header. This is a case where the overwriting process is performed after the area setting information allocated on the optical disk included in is updated.

  FIG. 18 shows the data arrangement when the overwrite spare area is reduced because the user area is insufficient during use of the optical disk.

When the overwriting spare area is reduced, a part of the overwriting spare area becomes a user area (hereinafter referred to as “additional user area”). The drive checks whether or not the user information that has been “logically overwritten” is included in a part of the additional user area from the area management table, and if it is determined that the user information that has been “logically overwritten” is included. The user information included in the additional user area is recorded in the spare area for overwriting, and the information in the area management table is updated. Thereafter, the recorded area included in the additional user area is handled in the same manner as the existing user area.
FIG. 19 shows the data arrangement when the overwrite spare area is expanded because the overwrite spare area is insufficient during the logical overwrite process.

  When the overwriting spare area is expanded, a part of the user area becomes an overwriting spare area (hereinafter referred to as “additional overwriting spare area”). The drive expands the overwrite spare area, that is, the area allocated on the optical disk included in the area management header in response to a command that means reassignment of the overwrite spare area from the host device or expansion of the overwrite spare area. Update configuration information. When this process is performed, if the user information contained in the recorded area included in the additional overwrite spare is required, the higher-level device reads this user information and another user before reassigning the overwrite spare area. User information needs to be recorded in the area. Further, if this user information is data recorded at a position promised in advance, for example, if it is data recorded at a position fixed from the outermost PBA, data in the user area using the logical overwrite function. By adding the address correspondence information that is overwritten in the overwriting spare area to the area management table, the user information can be moved logically without actually moving to the user area.

  Next, the defect process in the overwriting spare area will be described with reference to FIGS.

  FIG. 20 shows the data arrangement on the optical disk when the same defect processing as that for the user area is applied to the spare area for overwriting.

  In response to a (overwrite) recording request to the recorded area in the user area of the user information transmitted from the host device, the drive records the physical address (PBA (a)) in the user area corresponding to LBA (n). It is determined from the recording state management information that the area is a completed area, and an unrecorded area in the spare area for overwriting is searched from the recording state management information. At this time, if an unrecorded area including PBA (c) can be detected in the overwriting spare area, user information (N) is recorded in PBA (c), and PBA (BBA in the user area corresponding to LBA (n) is recorded. a) registers and updates the address correspondence information indicating the replacement with the PBA (c) in the overwrite spare area in the “area management table” and “area management header”. At this time, if the defect detection process for PBA (c) is performed using RAW or the like and it is determined that PBA (c) is a defect, the drive can newly use a PBA that can be used as a defect replacement area in the spare area. Search for. The user information (N) is rewritten to the PBA (b) in the determined spare area, and the recorded data is reproduced and checked whether the defect qualification condition is satisfied, as in the work performed in the overwrite dedicated spare area. If it is determined that it is not a defect, “PBA (a) in the user area corresponding to LBA (n) has been replaced with PBA (b) in the spare area” or indirectly “corresponding to LBA (n) PBA (a) in the user area has been replaced with PBA (c) in the spare area for overwriting, and PBA (c) in the spare area dedicated for overwriting has been replaced with PBA (b) in the spare area. Address correspondence information is registered and updated in the “area management table” and “area management header”.

  FIG. 21 shows the data arrangement on the optical disc when the same defect processing as that for the spare area is applied to the overwrite spare area.

  In response to a (overwrite) recording request to the recorded area in the user area of the user information transmitted from the host device, the drive records the physical address (PBA (a)) in the user area corresponding to LBA (n). It is determined from the recording state management information that the area is a completed area, and an unrecorded area in the overwriting spare area is searched from the recording state management information. At this time, if an unrecorded area including PBA (c) can be detected in the overwriting spare area, user information (N) is recorded in PBA (c), and PBA (BBA in the user area corresponding to LBA (n) is recorded. a) registers and updates the address correspondence information indicating the replacement with the PBA (c) in the overwrite spare area in the “area management table” and “area management header”. At this time, when defect detection processing for PBA (c) is performed using RAW or the like and it is determined that PBA (c) is defective, other unrecorded areas in the overwrite spare area are recorded again. Search for information. The user information (N) in the memory is recorded and reproduced again on the PBA (b) determined as the next recording area, and defect determination processing is performed. If it is determined that there is no need to handle it as a defect, address correspondence information indicating that PBA (a) in the user area corresponding to LBA (n) has been replaced with PBA (c) in the spare area for overwrite is used. Address correspondence information indicating that the PBA (a) in the user area corresponding to the LBA (n) is newly replaced with the PBA (b) in the spare area for overwrite is deleted from the “area management table”. Register and update in the “area management table” and “area management header”.

  Next, how this address correspondence information is registered in the area management table and managed by the area management table will be described.

  22 to 24 show the configuration of the address correspondence information that constitutes the area management table.

  In FIG. 22, the table located at the top in the figure shows the address correspondence information created when “logical overwriting” as shown in the data layout diagram of the two write-once optical disks located at the bottom occurs. . By adding the flag shown in FIG. 10 to this address correspondence information, it is possible to logically overwrite only a part of data included in LBA (n) as in the case of the defect processing.

  In FIGS. 23 and 24, the two tables located at the bottom of the figure are addresses applied when “logical overwriting” as shown in the data layout diagram of the two write-once optical disks located at the top occurs. The correction rules for correspondence information are shown.

  FIG. 22 shows address correspondence information created when a logical overwrite occurs. When the drive receives a recording request for LBA (m−1) from LBA (m) from the host device, the corresponding PBA (M) to PMA (N−1) have already been recorded, and the drive is a spare for overwriting. When the user information of LBA (m) to LBA (n-1) is recorded in the unrecorded area PBA (S) to PBA (T-1) in the area, "PBA (M) and PBA are added as new address correspondence information. Each address between (N-1) is assigned to each address of PBA (S) and PBA (T-1) on a one-to-one basis. “Overwrite started PBA”, “Overwrite start PBA” in the corresponding overwrite spare area, “Overwrite completed PBA” in the user area, and the corresponding overwriting spare Consists of "recording is finished PBA" in the region. Also, the configuration of the address correspondence information is “PBA where overwriting has started”, “PBA where recording has started”, and “number of addresses where logical overwriting has been performed continuously”, or “leading LBA ”,“ PBA where recording started ”, and“ LBA at the end ”, and“ PBA after recording ”corresponding to it,“ Lead LBA ”, and“ Recording started ” It is also possible to manage addresses in the same manner as “PBA” and “the number of addresses over which logical overwriting has been performed consecutively”.

  Next, rules for area management table reduction applied when address correspondence information by logical overwriting is newly added in a state where the area management table already includes address correspondence information for logical overwriting will be described. . Also, for the sake of explanation here, it is assumed that each address correspondence information in the area management table is always rearranged in order from the smallest “overwrite started PBA” at the top of the list.

  FIG. 23 shows the logic from PBA (M) to PBA (N-1) after “user information from PBA (L) to PBA (M-1) is recorded from PBA (R) to PBA (S-1)”. The address correspondence information when overwritten is shown.

  When the drive receives a recording request for LBA (m−1) from LBA (m) from the host device, the corresponding PBA (M) to PBA (N−1) have already been recorded, so the drive is for overwriting. User information from LBA (m) to LBA (n-1) is recorded in unrecorded areas PBA (S) to PBA (T-1) in the spare area. In this case, information such as “user information from PBA (M) to PBA (N−1) is recorded from PBA (S) to PBA (T−1)” is newly added to the area management table as address correspondence information. First, in order to keep the area of the area management table as small as possible, only the existing address correspondence information is corrected. In other words, when address correspondence information is newly added, “overwritten PBA” of existing address correspondence information located immediately before the position where this address correspondence information is inserted is added as “corresponding PBA”. The “PBA where overwriting has been started” of the corresponding address correspondence information and the “PBA where recording has started” are compared, and if each of them is a continuous relationship, the existing address correspondence information is changed to “PBA”. The user information recorded from (L) to PBA (N-1) is corrected to address correspondence information such as "recorded from PBA (R) to PBA (T-1)".

FIG. 24 shows that after “PBA (L) to PBA (N−1) user information is recorded from PBA (R) to PBA (T−1)”, the recorded areas PBA (L) to PBA (N−1) are recorded. The address correspondence information when logical overwriting from PBA (M) to PBA (N-1) is indicated.
When the drive receives a recording request for LBA (m−1) from LBA (m) from the host device, the corresponding PBA (M) to PBA (N−1) have already been recorded, so the drive is for overwriting. User information from LBA (m) to LBA (n-1) is recorded in unrecorded areas PBA (P) to PBA (Q-1) in the spare area. In this case, address correspondence information such as “user information from PBA (M) to PBA (N−1) is recorded from PBA (P) to PBA (Q-1)” is newly added to the area management table. Since the LBA and the PBA need to be associated one-to-one, the existing address correspondence information is also corrected. That is, when new address correspondence information is added, “overwrite started PBA” and “overwrite finished PBA” of the existing address correspondence information located immediately before the position where the address correspondence information is inserted, and the additional address The correspondence information “PBA where overwriting has started” and “PBA where overwriting has ended” are compared, and the whole or part of the area from “PBA where overwriting has started” to “PBA where overwriting has ended” in the additional address correspondence information Is included in “PBA where overwriting has been completed” from “PBA where overwriting has been started” in the existing address correspondence information, from “PBA (M) to PBA (N−1) from the existing address correspondence information. The information defined as “user information recorded in“ is recorded ”is deleted. In the case of FIG. 24, “overwritten PBA (M)” and “overwritten PBA (N−1)” of the additional address correspondence information are “overwritten PBA (overwrite started PBA (N−1)”). L) "and" PBA (N-1) for which overwriting has been completed "are all included, so" PBA for which overwriting has been completed "in the existing address correspondence information is corrected to PBA (M-1). Accordingly, the corresponding “recorded PBA” is also corrected to PBA (S−1) obtained by subtracting the difference between M and N−1 from PBA (T−1).

  FIG. 1 shows the write-once type optical disc recording process including the overwriting spare area and the arrangement of the areas on the optical disc as in FIG.

  In FIG. 15, the spare area management table for defect processing and the overwriting spare area management table for logical overwriting are managed by one table or recorded in the same area management table by another table. However, when the rules relating to the address correspondence information described with reference to FIGS. 23 and 24 are applied, the size of the overwrite spare area management table varies greatly depending on the overwrite spare area size and the user usage method.

  To solve this problem, as shown in FIG. 1, the overwriting spare area management table is recorded in the overwriting spare area, and the start position, size, etc. of the overwriting spare area management table in the effective overwriting spare area are recorded. Information is recorded in the area management header. Accordingly, in the logical overwriting process, in response to the instruction “record user information (N) in LBA (n)” from the host device, the drive uses the physical address (PBA (a)) in the user area corresponding to LBA (n). Is determined from the recording state management information, and if it is determined that PBA (a) has been recorded, an unrecorded area in the overwriting spare area that is substituted for PBA (a) is determined from the recording state management information. Then, the user information (N) stored in the memory is recorded in the unrecorded area, and then reproduced, and it is confirmed whether or not the defect certification condition is satisfied. If it is determined that it is not necessary to handle as a defect, address correspondence information such as PBA (a) in the user area corresponding to LBA (n) is replaced with PBA (c) in the spare area for overwrite, Registered in the spare area management table and the area management header, and recorded in the spare area for overwriting and the area management header recording area, respectively. The recording area in the spare area for overwriting of the area management header is retrieved from the recording state management information in the same manner as the user information.

  The correspondence between the PBA in the user area thus logically overwritten and the PBA in the overwrite spare area is “area management header and area management table” or “area management header and spare area management table and overwriting. In a write-once optical disc managed by the “spare area management table” and in which PBA is associated with LBA, as shown in FIG. 25, when playback is performed, a PBA corresponding to the LBA included in the request is received. Is determined with reference to the area management table. That is, when the PBA (a) in the user area corresponding to the LBA requested to be reproduced is not included in the area management table, the user information is read from the PBA (a), and the area management table includes PBA (a). In this case, the user information is read from the PBA associated with the address correspondence information in the area management table.

  The optical disk recording / reproducing apparatus for realizing the recording and reproducing processes necessary for the defect process and the logical overwriting process described in the sentence corresponds to the operation program of the microprocessor in FIG. 3 without adding a new circuit. It can be realized by changing to.

FIG. 3 is a data layout diagram of a write-once optical disc that realizes “logical overwrite”. FIG. 3 is an area layout diagram of a rewritable or write once optical disc. It is an optical disk recording / reproducing apparatus figure. FIG. 6 is a data layout diagram of a rewritable or write-once optical disc that realizes “defect management”. It is an operation | movement flowchart of an optical disk recording / reproducing apparatus. It is a physical data arrangement | positioning figure of DVD-RAM. It is a figure which shows the arrangement | positioning method of a spare area management header and a spare area management table. FIG. 3 is a data layout diagram of a rewritable or write once optical disc with an unrecorded area as a recorded area. FIG. 3 is a data layout diagram of a rewritable or write-once optical disc with a recorded area as a recording area. It is a figure which shows the structure of address corresponding information. It is a figure which shows the recording status management information showing the recording status of each address on a write-once optical disc. FIG. 3 is a data layout diagram of a write-once optical disc that realizes “logical overwrite”. FIG. 3 is an area layout diagram of a write-once optical disc. It is a figure which shows the recording status management information showing the recording status of each address on a write-once optical disc. FIG. 3 is a data layout diagram of a write-once optical disc that realizes “logical overwrite”. It is a figure which shows the change of area | region arrangement | positioning of a write-once type | mold optical disk. It is a figure which shows the change of area | region arrangement | positioning of a write-once type | mold optical disk. It is a figure which shows the change of area | region arrangement | positioning of a write-once type | mold optical disk. It is a figure which shows the change of area | region arrangement | positioning of a write-once type | mold optical disk. FIG. 6 is a data layout diagram of a write-once optical disc that realizes “defect management” of an overwriting spare area. FIG. 6 is a data layout diagram of a write-once optical disc that realizes “defect management” of an overwriting spare area. It is a figure which shows the structure of address corresponding information. It is a figure which shows the rule applied to address corresponding information. It is a figure which shows the rule applied to address corresponding information. FIG. 3 is a data layout diagram of a write-once optical disc that realizes “logical overwrite”.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Optical head, 11 ... Optical disk, 21 ... Light spot, 22 ... Light beam, 23 ... Objective lens, 24 ... Collimator lens, 25 ... Laser, 26 ... Detector, 27 ... Detector, 28 ... Beam splitter, 29 ... Hologram element, 31 ... Lens actuator, 41 ... Signal reproduction block.

Claims (8)

A recording apparatus for a write-once recording medium having address information, lead-in area, user area, spare area, and lead-out area,
In the user area, recorded addresses are managed by recording state management information,
The relationship between the address unit information of the user area and the address unit information of the spare area is managed by address correspondence information,
In response to a user information recording request from the host device, when it is detected that the recording requested address is recorded from the recording state management information,
When it is a user information recording request that does not need to be recorded in real time, the user information requested to be recorded is recorded in the unrecorded area of the spare area, and the address correspondence information is updated.
The address correspondence information is rearranged using data constituting the address correspondence information, and an address in the user area included in the existing address correspondence information among two or more address correspondence information arranged before and after the address correspondence information is added. A part of the address in the user area included in the address correspondence information in which the address in the user area included in the existing address correspondence information is added by comparing the address in the user area included in the address correspondence information The existing address correspondence information is updated so as to exclude information on addresses in the user area included in the added address correspondence information from the existing address correspondence information. apparatus. A write-once recording medium recording apparatus having address information, lead-in area, user area, spare area, overwriting spare area, and lead-out area,
In the user area and the spare area for overwriting, recorded addresses are managed by recording state management information,
The relationship between the address unit information of the user area and the address unit information of the spare area for overwriting is managed by address correspondence information,
In response to a recording request for user information from a higher-level device, if it is detected that the requested recording address has been recorded from the recording status management information, the requested user information is overwritten from the recording status management information. Is recorded in the unrecorded area of the spare area, and the address correspondence information is updated.
The address correspondence information is rearranged by using data constituting the address correspondence information, and added to the address in the user area included in the existing address correspondence information among the two or more address correspondence information arranged before and after. Compares the address in the user area included in the address correspondence information and includes a part of the address in the user area included in the address correspondence information to which the address in the user area included in the existing address correspondence information is added. In the case, the existing address correspondence information is updated so as to exclude the information about the address in the user area included in the added address correspondence information from the existing address correspondence information. .   A recording method for a write-once recording medium having address information, lead-in area, user area, spare area, and lead-out area,
  In the user area, recorded addresses are managed by recording state management information,
  The relationship between the address unit information of the user area and the address unit information of the spare area is managed by address correspondence information,
  In response to a user information recording request from the host device, if the recording request address from the recording state management information has already been recorded and the user information does not need to be recorded in real time, the user information requested to be recorded Is recorded in the unrecorded area of the spare area, and the address correspondence information is updated.
  Rearranging the address correspondence information using data constituting the address correspondence information,
  Compares the address in the user area included in the existing address correspondence information with the address in the user area included in the added address correspondence information among the two or more address correspondence information arranged in front and rear,
  When the address in the user area included in the existing address correspondence information includes a part of the address in the user area included in the address correspondence information added, it is included in the address correspondence information added from the existing address correspondence information. A recording method for a write-once recording medium, wherein existing address correspondence information is updated so as to exclude information related to addresses in a user area.   A write-once recording medium recording method having address information, lead-in area, user area, spare area, overwriting spare area, and lead-out area,
  In the user area and the spare area for overwriting, recorded addresses are managed by recording state management information,
  The relationship between the address unit information of the user area and the address unit information of the spare area for overwriting is managed by address correspondence information,
  In response to a recording request for user information from a higher-level device, if it is detected that the requested recording address has been recorded from the recording status management information, the requested user information is overwritten from the recording status management information. Is recorded in the unrecorded area of the spare area, and the address correspondence information is updated.
  Rearranging the address correspondence information using data constituting the address correspondence information,
  Compare the address in the user area included in the existing address correspondence information with the address in the user area included in the added address correspondence information among the two or more address correspondence information arranged in front and rear,
  When the address in the user area included in the existing address correspondence information includes a part of the address in the user area included in the address correspondence information added, the address correspondence information added from the existing address correspondence information is changed. A recording method for a write-once recording medium, wherein existing address correspondence information is updated so as to exclude information relating to addresses in a user area included.   A write-once recording medium reproducing device having address information, lead-in area, user area, spare area, and lead-out area,
  In the user area, recorded addresses are managed by recording state management information,
  The relationship between the address unit information of the user area and the address unit information of the spare area is managed by address correspondence information,
  In response to a user information recording request from the host device, if the recording request address from the recording state management information has already been recorded and the user information does not need to be recorded in real time, the user information requested to be recorded Is recorded in the unrecorded area of the spare area, and the address correspondence information is updated,
  The address correspondence information is rearranged using data constituting the address correspondence information, and an address in the user area included in the existing address correspondence information among two or more address correspondence information arranged before and after the address correspondence information is added. A part of the address in the user area included in the address correspondence information in which the address in the user area included in the existing address correspondence information is added by comparing the address in the user area included in the address correspondence information , The existing address correspondence information has been updated so as to exclude information related to addresses in the user area included in the address correspondence information added from the existing address correspondence information,
  A reproducing apparatus for a write-once recording medium, wherein information is reproduced based on the updated address correspondence information.   A write-once recording medium playback device having address information, lead-in area, user area, spare area, overwriting spare area, and lead-out area,
  In the user area and the spare area for overwriting, recorded addresses are managed by recording state management information,
  The relationship between the address unit information of the user area and the address unit information of the spare area for overwriting is managed by address correspondence information,
  When the recording request address from the recording status management information has been recorded in response to the user information recording request from the host device, the recording requested user information is stored in the overwriting spare area detected from the recording status management information. It is recorded in the unrecorded area and the address correspondence information is updated,
  The address correspondence information is rearranged using data constituting the address correspondence information, and is added to the address in the user area included in the existing address correspondence information among two or more address correspondence information arranged in front and rear. Part of the addresses in the user area included in the address correspondence information to which the addresses in the user area included in the existing address correspondence information are added. If included, the existing address correspondence information has been updated to exclude information related to addresses in the user area included in the address correspondence information added from the existing address correspondence information,
  A reproducing apparatus for a write-once recording medium, wherein information is reproduced based on the updated address correspondence information.   A method for reproducing a write-once recording medium having address information, lead-in area, user area, spare area, and lead-out area,
  In the user area, recorded addresses are managed by recording state management information,
  The relationship between the address unit information of the user area and the address unit information of the spare area is managed by address correspondence information,
  In response to a user information recording request from the host device, if the recording request address from the recording state management information has already been recorded and the user information does not need to be recorded in real time, the user information requested to be recorded Is recorded in the unrecorded area of the spare area and the address correspondence information is updated,
  The address correspondence information is rearranged using data constituting the address correspondence information,
  Compare the address in the user area included in the existing address correspondence information with the address in the user area included in the added address correspondence information, and compare The user included in the address correspondence information added from the existing address correspondence information when the address in the user region included in the address correspondence information includes a part of the address in the user region included in the address correspondence information added Existing address correspondence information is updated to exclude information about addresses in the area,
  A method for reproducing a write-once recording medium, wherein information is reproduced based on the updated address correspondence information.   A method for reproducing a write-once recording medium having address information, lead-in area, user area, spare area, overwriting spare area, and lead-out area,
  In the user area and the spare area for overwriting, recorded addresses are managed by recording state management information,
  The relationship between the address unit information of the user area and the address unit information of the spare area for overwriting is managed by address correspondence information,
  In response to a recording request for user information from the host device, if it is detected that the requested recording address has been recorded from the recording status management information, the requested user information is detected from the recording status management information. It is recorded in the unrecorded area of the spare area for overwriting, and the address correspondence information is updated,
  The address correspondence information is rearranged using data constituting the address correspondence information,
  The address in the user area included in the existing address correspondence information is compared with the address in the user area included in the added address correspondence information among the two or more address correspondence information arranged before and after the existing address correspondence information. When the address in the user area included in the correspondence information includes a part of the address in the user area included in the address correspondence information added, the user area included in the address correspondence information added from the existing address correspondence information Existing address correspondence information has been updated to exclude information about addresses in
  A method for reproducing a write-once recording medium, wherein information is reproduced according to the updated address correspondence information.

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