JP2004146008A - Write-once recording medium, method for recording and reproducing information, and device for recording and reproducing information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem that the device has a poor area efficiency to record the information peculiar to the device and a medium on a write-once recording medium, and has to take time to obtain the information. <P>SOLUTION: The information 11 peculiar to the medium including a using area of an OPC area 7 and a data area 7 and the information 11 peculiar to a plurality of devices loaded with this medium are coupled into one block, and are recorded in a device medium information area 9 in a device medium information write-once area 8. The information peculiar to the device 11 is sorted in time sequence of attaching the medium, and a medium more recently attached to the device is selectively stored. Useful information peculiar to the device 10 and the information peculiar to the medium 11 can be obtained from the device medium information area 9 recorded last. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to a write-once recording medium having a device-specific information area for recording device-specific information for a plurality of devices, and a device-specific information additional recording region for additionally recording the device-specific information region, and The present invention relates to an information recording / reproducing method and an information recording / reproducing apparatus for a write-once recording medium.
[0002]
Further, the present invention relates to a write-once recording medium provided with medium-specific information such as a recorded area, an information recording / reproducing method and an information recording / reproducing apparatus for the write-once recording medium.
[0003]
[Prior art]
An optical disc is an information recording medium that can be exchanged between a plurality of devices. In recent years, CDs that have been developed for music and are widely used for data, DVDs that have been developed for digital video and have begun to spread rapidly, and for high-quality video such as HDTV have been developed. And next-generation optical disks.
[0004]
These optical disks are roughly classified into three types: a read-only type, a write-once type, and a rewritable type. The write-once type is a medium in which a recording material that cannot be erased is used and can be recorded only once in the same place on the medium. For example, a CD-R or DVD-R is a write-once medium. The rewritable type is a medium that can be recorded in the same place on the medium any number of times, such as a CD-RW or DVD-RAM.
[0005]
In general, an optical disc apparatus performs OPC (Optimum Power Calibration) on a recordable optical disc prior to recording user data in order to determine an optimum recording condition. Further, the optical disk device records device-specific information such as previously obtained recording conditions on the optical disk so that OPC can be efficiently performed when the optical disk is remounted.
[0006]
In the conventional recording / reproducing method of device-specific information, information of a device which has recently mounted the medium is left in a device which has mounted the medium beforehand in accordance with a FIFO (First In First Out) algorithm (for example, And Patent Document 1).
[0007]
Further, with respect to another conventional recording / reproducing method of device-specific information, only its own recording conditions are left in the OPC area itself (for example, see Patent Document 2).
In a write-once optical disc, there is a limitation that information cannot be rewritten due to the characteristics of a recording material, and thus it is necessary to manage a recorded area and an unrecorded area. In a CD-R, a recording start position and a final recording position are managed in music units so that additional recording can be performed in music units. The unit of the music is called a track (hereinafter, referred to as a capital letter TRACK to distinguish it from a track indicating a groove shape). CD-Rs are sequentially recorded from the inner circumference to the outer circumference in units of TRACK, and there must be no unrecorded area between recorded areas in TRACK. Since the total number of TRACKs is allowed in a CD-R up to 99, an unrecorded TRACK can be inserted between recorded TRACKs, although it is in TRACK units. Generally, an optical disk device that handles a write-once optical disk writes information unique to a medium for determining a recorded area before ejecting the optical disk and reads it when the optical disk is mounted.
[0008]
As for a conventional recording / reproducing method of medium-specific information, there is a method of checking between music pieces based on TOC information so that an unrecorded portion can be detected at high speed (for example, see Patent Document 3).
Initially, the CD-R was developed for music, but has recently been used for data storage. When a CD-R is used for data storage, management is performed not by TOC information but by a file system such as UDF, and a plurality of files are recorded in one TRACK. In the UDF, a VAT (Virtual Allocation Table) is recorded on the outermost side of a recorded area, and each file can be traced from the VAT (for example, see Patent Document 2).
[0009]
In the case of a rewritable information recording medium, the device-specific information may be arranged at a unique location on the medium and rewritten to the latest information as needed. Since there is no problem, there is no problem in describing the device-specific information on the medium. However, in the case of a write-once type information recording medium, in order to update the device-specific information to the latest content, it must be recorded in another location. Therefore, it is necessary to search for a location where the latest device-specific information is described. There is. In addition, since it is not possible to learn the OPC area in a recorded area, it is necessary to search for an unrecorded area.
[0010]
The boundary between recorded and unrecorded data areas is also limited to a maximum of 99 TRACK units on a CD-R or the like, and therefore cannot be used for data file management. Data management is performed at the file system level such as VAT using only one TRACK, and there is a restriction that there must be no unrecorded area between recording areas in TRACK. become. Therefore, the information recording medium is difficult to realize random recording. The DVD-R also defines an RZone corresponding to the TRACK of a CD, and is also subject to the restriction that there must be no unrecorded area sandwiched between recording areas in the RZone.
[0011]
[Patent Document 1]
Patent No. 3285337
[0012]
[Patent Document 2]
JP 2001-351241 A
[0013]
[Patent Document 3]
Patent No. 2752006
[0014]
[Problems to be solved by the invention]
However, in the information recording medium and the information recording / reproducing method in which the device-specific information or the medium-specific information is recorded as described above, an area for searching for a boundary between recorded and unrecorded is provided for a write-once information recording medium. There is a problem that it takes a long time to access the user data after the information recording medium is mounted, because there are a plurality of them. If the search for the boundary fails even in any one of the plurality of regions, there is also a problem that erroneous information is obtained. For example, it is necessary to search for a position where the latest device-specific information is recorded, or to search for an available OPC area.
[0015]
Further, in the write-once recording medium on which the medium-specific information is recorded and the information recording / reproducing method described above, the boundary between the recorded area and the unrecorded area is premised on a unit (TRACK or RZone) which must be sequentially recorded. Since information is used, there is also a problem that random recording is difficult to achieve due to restrictions on management at the file system level.
[0016]
SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a write-once recording medium and an information recording medium that enable accurate and quick access to user data by devising the contents of device-specific information and medium-specific information, and the arrangement of areas for storing the information. An object of the present invention is to provide a recording / reproducing method and an information recording / reproducing device.
[0017]
[Means for Solving the Problems]
The write-once recording medium of the present invention is a write-once recording medium that performs recording and reproduction in block units, and includes a data area for recording data and a device information additional recording area for recording device-specific information, The device information additional area has an area to which a plurality of device information areas can be allocated, and the apparatus information area is recorded in order from one end of the area, and the device information area is at least one block. M is an integer greater than or equal to 2 and can store the device-specific information for a maximum of M devices, and arranges the device-specific information in the order of the latest device recorded on the write-once recording medium.
[0018]
The write-once recording medium of the present invention is a write-once recording medium that performs recording and reproduction in block units, a data area for recording data, and a device medium information additional recording area for recording device-specific information and medium-specific information. The device medium information additional recording area has an area to which a plurality of device medium information areas can be allocated, the device medium information area is recorded in order from one end of the area, the device medium information area is , At least one block, M is an integer of 2 or more, and comprises an area in which the device-specific information for up to M devices can be stored, and an area in which the medium-specific information can be stored. The device-specific information is arranged in the order of the device having the latest time recorded on the recording medium.
[0019]
In the write-once recording medium of the present invention, M is a power of 2, or M is a value obtained by subtracting 1 from the power of 2.
In the write-once recording medium of the present invention, the device-specific information is information used by a device capable of mounting the write-once type recording medium when recording and reproducing the data area.
[0020]
In the write-once recording medium of the present invention, the medium-specific information includes information on a last recording position of the data area.
In the write-once recording medium of the present invention, the write-once recording medium includes an OPC area for learning an optimum recording condition, and the medium-specific information includes information on a usable position of the OPC area.
[0021]
In the write-once recording medium of the present invention, the block unit is an error correction unit.
In the write-once recording medium of the present invention, the medium-specific information includes information on a position that does not include an unrecorded area between the data area and the last recorded position.
[0022]
In the write-once recording medium of the present invention, the medium-specific information includes information of a position within a predetermined range from a final recording position of the data area.
An information recording / reproducing method according to the present invention is an information recording / reproducing method for a write-once recording medium that performs recording / reproduction in block units, wherein the write-once recording medium has a data area for recording data, A device information additional recording area for recording information, the device information additional recording area has an area to which a plurality of device information areas can be allocated, the device information area is at least one block, M is an integer of 2 or more and can store the device-specific information for up to M devices. The information recording / reproducing method includes: (a) reading out the device information area recorded last; If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproducing is performed using the device-specific information, and the one recorded by itself is not included in the device-specific information. (C) arranging the device-specific information containing its own learning result at the top of a maximum of M pieces of the device-specific information; Recording the contents including the device-specific information in the device information area which is not recorded and located at one end in the device information additional recording area.
[0023]
An information recording / reproducing method according to the present invention is an information recording / reproducing method for a write-once recording medium that performs recording / reproduction in block units, wherein the write-once recording medium has a data area for recording data, It has an apparatus medium information recording area for recording information and medium specific information, and an OPC area for learning optimal recording conditions, and the apparatus medium information recording area can be assigned with a plurality of apparatus medium information areas. The device medium information area is at least one block, M is an integer of 2 or more, and can store the device specific information and the medium specific information for up to M devices. The information recording / reproducing method includes the steps of (a) reading the device medium information area recorded last and (e) determining an OPC area available for learning from the medium unique information. And (b) if there is a maximum of M pieces of the device-specific information recorded by itself, perform learning necessary for recording and reproduction using the device-specific information, and If there is no recorded information, a default learning step is performed; and (c) a step of arranging the device unique information containing its own learning result at the top of a maximum of M pieces of the device unique information; f) a step of writing the position of the OPC area used for learning in step (e) in the medium specific information; and (d) contents including up to M pieces of the device specific information and the medium specific information, Recording in the device medium information area which is not recorded and located at one end in the apparatus medium information additional recording area.
[0024]
An information recording / reproducing method according to the present invention is an information recording / reproducing method for a write-once recording medium that performs recording / reproduction in block units, wherein the write-once recording medium has a data area for recording data, It has an apparatus medium information recording area for recording information and medium specific information, and an OPC area for learning optimal recording conditions, and the apparatus medium information recording area can be assigned with a plurality of apparatus medium information areas. The device medium information area is at least one block, M is an integer of 2 or more, and can store the device specific information and the medium specific information for up to M devices. The information recording / reproducing method includes: (a) reading the device medium information area recorded last; and (e) acquiring an OPC area available for learning from the medium unique information. (G) obtaining a final recording position of a data area from the medium-specific information; and (b) using the device-specific information if there is a maximum of M pieces of the device-specific information recorded by itself. Performing learning required for recording and reproduction, and performing default learning if there is no self-recorded information in the device-specific information; and (c) the device-specific information containing its own learning result. (F) placing the position of the OPC area used for learning in step (e) in the medium-specific information; (C) writing a final recording position changed by recording in the area in the medium specific information; and (d) adding contents including up to M pieces of the device specific information and the medium specific information to the device medium information. And a step of recording the apparatus medium information region located and one end unrecorded in the range.
[0025]
In the information recording / reproducing method of the present invention, M is a power of 2, or M is a value obtained by subtracting 1 from the power of 2.
In the information recording / reproducing method of the present invention, the block unit is a unit of error correction.
[0026]
In the information recording / reproducing method according to the present invention, the step (d) is executed immediately before the write-once recording medium is ejected from the apparatus.
In the information recording / reproducing method according to the present invention, the step (d) is performed after a period during which recording / reproduction is not performed on the write-once type recording medium continues for a predetermined time or more.
[0027]
In the information recording / reproducing method according to the present invention, in the step (h), the step (d) is executed when the data recording is started from the last recording position before the data recording with the unrecorded area interposed therebetween.
[0028]
In the information recording / reproducing method according to the present invention, when a difference between the last recording position of the current data area and the last recording position of the data area when the step (d) was previously executed exceeds a predetermined range. Then, the step (d) is executed.
An information recording / reproducing apparatus according to the present invention is an apparatus including the information recording / reproducing method.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
(Embodiment 1)
Hereinafter, the write-once recording medium according to the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an area configuration diagram of an optical disc according to Embodiment 1 of the present invention. A large number of tracks 2 are formed in a spiral shape on the disk-shaped disk medium 1, and a large number of blocks 3 that are finely divided are formed on each track 2. Block 3 is a unit of error correction, and is a minimum unit in which recording and reproducing operations are performed. The area of the disk medium 1 is roughly divided into a lead-in area 4, a data area 5, and a lead-out area 6. Data recording and reproduction are performed on the data area 5. The lead-in area 4 and the lead-out area 6 serve as margins so that the optical head (not shown) can follow the track even if the optical head overruns when accessing the end of the data area 5. . Further, the lead-in area 4 includes an OPC area 7 for learning a recording condition of the disc, and a device medium information additional recording area 8 for writing device-specific information and medium-specific information. In the device medium information additional recording area 8, a plurality of device medium information device areas 9 can be allocated to update the contents. One device medium information area 9 includes at least one block 3, but is typically one block 3.
[0030]
FIG. 2 is a diagram showing a data structure of the device medium information area 9 according to Embodiment 1 of the present invention. The content written in the device medium information area 9 is composed of 31 pieces of device specific information 10 and one piece of medium specific information 11. The device-specific information 10 includes a device identifier 12 for identifying a device on which the optical disk is mounted, and a learning result 13 obtained by the device. The medium-specific information 11 includes an available position 14 of the OPC area indicating an area that remains unrecorded on the medium and can be used for learning, and the outermost position (most along the track 2) in the data area 5 of the medium. (In the case where the spiral direction of the track is reversed, it is the innermost when the track is reversed) and the final recording position 15 of the data area indicating the recorded position.
[0031]
In FIG. 2, the value following the symbol # attached to the 31 device-specific information 10 indicates a time series in which the learning result 13 is obtained for convenience of description, and the value included in the device-specific information 10 Absent. Here, n is an integer of 1 or more (when the value following the symbol # becomes a value of 0 or less in the calculation, the device-specific information 10 does not exist, and thus, for example, the contents are all padded with 0). .
[0032]
In other words, in the device medium information area 9 of the disk medium 1, the learning result 13 of the device that has mounted the disk and used the OPC region 7 more recently is stored as device-specific information 10, and the used OPC region 7 Is stored as the medium specific information 11 in the OPC area available position 14 which indicates
[0033]
FIG. 3 is a diagram showing an example of a change in the content of the device medium information area 9 according to the recording state of the OPC area 7 according to the first embodiment of the present invention. The OPC area 7 is used from the outer peripheral side of the disk medium 1, and an area for several times of learning is recorded by an already mounted device (an area hatched with oblique lines). At this point, the latest contents are recorded in the i-th device medium information area 9 of the device medium information additional recording area 8. If a recording operation is attempted by a device to which the disk medium 1 has not been mounted, the following will occur. With reference to the available position 14 of the OPC area described in the medium unique information 11, a recording operation is performed from the OPC area 7 to an area for one learning (a black area). The contents of the oldest # (n-30) assigned to the number 31 in the previous device unique information 10 are discarded. The contents of #n to # (n-29) except for the oldest one in the previous device unique information 10 are changed from the locations of numbers 1 to 30 to the locations of numbers 2 to 31. The newly learned device unique information is placed as # (n + 1) device unique information 10 at the location of number 1. Further, the newly used OPC area information is reflected in the available position 14 of the OPC area, and the content of the medium unique information 11 is changed. This content is recorded in the (i + 1) th device medium information area 9 of the device medium information additional recording area 8.
[0034]
As can be seen from FIG. 3, the contents of both the device-specific information 10 including the device-specific learning result and the medium-specific information 11 including the usage status of the medium-specific OPC area change when OPC is performed. Recording contents that change almost synchronously in the same area is advantageous for a write-once type information recording medium in terms of area use efficiency and speeding up search for the latest information in the area. As in the related art, an area indicating the usage status of the OPC area (for example, a CD-R count area; see FIG. 5 of Patent Document 2) and an area for storing the OPC learning result (for example, DVD-RAM drive information) As compared with the case where the area is separated from the area (see FIG. 2 of Patent Document 1), there is twice as superior in both the area use efficiency and the search speed of the latest information.
[0035]
FIG. 4 is a diagram showing an example of a change in the content of the device medium information area 9 according to the recording state of the data area 5 according to Embodiment 1 of the present invention. The data area 5 is used from a relatively inner peripheral side of the disk medium 1, and an area hatched by oblique lines is recorded. It is assumed that the latest content is recorded in the (i + 1) -th device medium information area 9 of the device medium information additional recording area 8 at the time point after the OPC. When new data is recorded in the data area 5 of the disk medium 1, the following is performed. By recording an area closer to the outer periphery of the data area 5 (area painted in black), the final recording position 15 of the data area changes, and the content of the medium unique information 11 is changed. Here, since OPC is not performed, # (n + 1) to # (n-29) of the device unique information 10 are arranged at the positions of the numbers 1 to 31 as they are. This content is recorded in the (i + 2) th device medium information area 9 of the device medium information additional recording area 8.
[0036]
In FIG. 4, an unrecorded area is not included in the recorded area of the data area 5, but may be included. In other words, the concept of TRACK in a conventional CD or RZone in a DVD-R is excluded, and thereby there is no restriction that sequential recording must be performed in units of the partition. In the first embodiment of the present invention, the final recording position 15 of the data area is the outermost position in the data area 5 of the disk medium 1 (in the sense that the spiral direction of the track is opposite to the rearmost position along the track 2). In the case of, the position is the innermost position). As described in the conventional example, for data use, file management is generally performed by a file system, and in the case of a DVD or later, even a song is managed by the file system as one file. In a write-once optical disc, a VAT is recorded on the outermost side of a recorded area, various kinds of file information can be traced from the VAT, and management information of a recorded area and an unrecorded area is also recorded by the file system. It is recorded in area 5. Therefore, it is not necessary to separately provide the lead-in area 4 with management information of a recorded area and an unrecorded area (a program management area of a CD-R; see FIG. 5 of Patent Document 2). The information unique to the medium described in the lead-in area 4 only needs to be able to determine the final recording position 15 of the data area in order to inform the file system of the position of the VAT. As described above, as in the conventional management of the data area 5 by TRACK or RZone, the restriction that an unrecorded area must not be included between recorded areas, that is, the restriction of an area where sequential recording is essential is eliminated. And random recording can be easily performed.
[0037]
Further restrictions can be relaxed. The last recording position 15 of the data area described in the device medium information recording area 9 and the outermost recording position of the data area 5 of the disk medium 1 completely match unless an unrecorded area is included. No need. The reason is that the optical disc apparatus determines the actual outermost recording position of the data area 5 by checking the recorded area or the unrecorded area from the last recording position 15 of the data area toward the outer circumference. Because you can do it. This will be described later in a second embodiment.
[0038]
As can be seen from FIG. 4, by providing the device medium information area 9 further including the final recording position 15 of the data area as the medium specific information 11, information necessary for recording in the data area can be obtained at once. This is advantageous for a write-once information recording medium in terms of speeding up the search for the latest information. As in the related art, an area indicating the usage status of the OPC area (for example, a CD-R count area; see FIG. 5 of Patent Document 2) and an area indicating the recording area of the data area (for example, CD-R program management) As compared with the case where the area is separated from FIG. 5 of Patent Document 2, the search speed of the latest information is twice as high, which is also advantageous in terms of area use efficiency.
[0039]
As described above, according to the first embodiment of the present invention, device-specific information 10 including a device-specific learning result, and medium-specific information 11 including a medium-specific OPC area usage state and a data area recording state are described. By recording in the same area, it is possible to improve the use efficiency of the area and to speed up the search for the latest information in the area. Furthermore, as the recording condition of the data area described in the medium unique information 11, by allowing the unrecorded area to be included on the inner peripheral side from the last recording position of the data area, recording can be performed at a random place. .
[0040]
(Embodiment 2)
Hereinafter, an information recording / reproducing apparatus according to Embodiment 2 of the present invention will be described with reference to the drawings.
FIG. 5 shows the configuration of the optical disc device 100 according to the second embodiment of the present invention.
The optical disk device 100 is connected to a host controller (not shown) via an I / O bus 170. The host controller is typically a host computer. The optical disk device 100 includes an instruction processing unit 110 that processes an instruction from a higher-level control device, a recording control unit 120 that performs control during recording on the disk medium 1, and a reproduction control that performs control during reproduction from the disk medium 1. Unit 130, a device medium information storage buffer 140 for storing contents reproduced from the device medium information area 9, a data buffer 150 for temporarily storing recorded and reproduced data, and a device medium information processing for processing device medium information The unit 160 is functionally provided.
[0041]
The apparatus medium information processing section 160 searches the apparatus medium information area 9 recorded last in the apparatus medium information additional recording area 8, and then reads the contents thereof to the apparatus medium information storage buffer 140. A device medium information updating unit 162 for writing the contents of the device medium information storage buffer to the device medium information area 9 to be used next, and a learning processing unit 163 for executing the OPC and reflecting the result in the device medium information storage buffer 140. And a data area management unit 164 that manages the outermost position of the recorded area of the data area 5, and a device medium information control memory 165 that stores the operation control state of the device medium information processing unit 160.
[0042]
Hereinafter, the operation of the disk device 100 according to the second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a diagram showing a relationship between each area of the disk medium 1 and each component of the optical disk device 100 according to the second embodiment of the present invention.
[0043]
FIG. 7 is a flowchart showing the operation of the disk device 100 according to Embodiment 2 of the present invention.
In FIG. 6, before the disc medium 1 is mounted on the optical disc apparatus 100, the portions hatched by oblique lines of the OPC area 7, the data area 5, and the apparatus medium information additional recording area 8 have been recorded.
[0044]
When the disk medium 1 is mounted on the optical disk apparatus 100 (step 201), the apparatus medium information reading unit 161 reads the contents from the apparatus medium information area 9 recorded last in the apparatus medium information additional recording area 8, and reads the apparatus medium information. The data is stored in the storage buffer 140 (step 202).
[0045]
If there is a data recording request from the host controller (step 203), and if OPC has not been performed (step 204), the area that can be used by the learning processing unit 163 from the OPC area 7 (the area blacked out in FIG. 6). Is selected and OPC is executed, and the result is reflected in the device medium information storage buffer 140 (step 205). Here, if the device identifier 12 of the device-specific information 10 in the number k of the device medium information storage buffer 140 matches the optical disc device 100, the learning result 13 is used as OPC reference information, and the learning result 13 is used as a newly learned value. One device-specific information 10. In this case, the contents corresponding to the numbers 1 to (k-1) of the device unique information 10 are moved to the numbers 2 to k. Subsequently, a recording operation is performed on an area corresponding to the data recording request of the data area 7 (the area painted in black in FIG. 6), and the final recording position 15 of the data area is set as necessary. (Step 206). Whether or not the content of the device medium information storage buffer 140 has been changed is stored in the update flag 21 in the device medium information control memory 165.
[0046]
If there is no device-specific information 10 having the same device identifier 12 in the optical disc device 100, the device-specific information is arranged in the device medium information storage buffer 140 as shown in FIG.
[0047]
When there is a data reproduction request from the host controller (step 207), an area corresponding to the request is reproduced from the data area 7 (step 208). In the range beyond the last recording position 15 of the data area in the device medium information storage buffer 140, the disk medium 1 is not accessed, and for example, zero padded data may be returned. An error notification indicating that the value is out of the range may be sent.
[0048]
If there is a disk ejection request from the host device (step 209), or if there is no request for a predetermined time or more from the host device (step 210), the contents of the device medium information storage buffer 140 are changed with reference to the update flag 21. In step 211, the device medium information updating unit 162 stores the contents of the device medium information storage buffer 140 in the device medium information region 9 (the black region in FIG. 6) that can be used next to the device medium information additional recording region 8. Recording is performed (step 212). Subsequently, if there is a disc ejection request (step 213), the disc medium 1 is ejected and waits for a new disc to be mounted (step 214).
[0049]
Note that it is not essential to check in step 210 whether there is a request for a predetermined time or more from the higher-level device. However, by inserting this step, it is possible to (1) improve resistance to unexpected power-off, and (2) request disk ejection. A quick discharge operation after receiving the information can be achieved. The predetermined time may also be used as a standby time for stopping the disk rotation to save the power consumption of the optical disk device 100, and the disk rotation is stopped after the device medium information 9 is updated. Operation is faster.
[0050]
By providing a nonvolatile memory such as an EEPROM in the optical disc device 100, the problem (1) can be solved even if step 210 is omitted. In this case, the disc ejection is prohibited until the power is turned on again, and the contents of the device medium information saved in the nonvolatile memory are recorded in the device medium information 9 when the power is turned on again.
[0051]
Hereinafter, the operation of the device medium information reading unit 161 according to Embodiment 2 of the present invention will be described in detail with reference to FIGS.
FIG. 8 is a flowchart illustrating the operation of the device medium information reading unit 161 according to Embodiment 2 of the present invention.
[0052]
FIG. 9 is a diagram showing an operation in which the device medium information reading unit 161 according to Embodiment 2 of the present invention searches for the device medium information area 9 in which information is recorded last.
The inspection is performed until the amplitude disappears every predetermined block from the end of the apparatus medium information additional recording area 8 (first amplitude inspection), and the position where the amplitude disappears from the position where the amplitude was present to the position where the amplitude was not present is inspected ( Second amplitude test), the position of the recorded end device medium information area 9 obtained by the test is stored in the position 22 of the device medium information in the device medium information control memory 165 (step 301).
[0053]
The contents are read from the device medium information area 9 stored in the position 22 of the device medium information and stored in the device medium information storage buffer 140, and the last recorded position (LRA: Last Recorded Address) 15 of the data area is stored in the device medium information. The data is copied to the FLRA (Flushed Last Recorded Address) 23 reflected on the medium in the control memory 165 (step 302).
[0054]
Note that the operation of setting the LRA in the FLRA in step 302 is related to the operation of the data area management unit 164 (step 506) described later, and this paired operation may be omitted as necessary.
[0055]
Note that the operation of searching the last recorded device medium information area 9 described with reference to FIG. 9 is an example, and the second amplitude test may be performed on the entire device medium information additional recording area 8, A two-branch search (binary search) may be performed on the entire area of the apparatus medium information additional recording area 8, and any method may be used as long as the apparatus medium information area 9 recorded last can be detected.
[0056]
FIG. 10 is a flowchart illustrating the operation of the learning processing unit 163 according to Embodiment 2 of the present invention.
The OPC area to be used is determined with reference to the available position 14 of the OPC area of the medium unique information 11 in the apparatus medium information storage buffer 140 (step 401).
[0057]
If the device identifier 12 matches #m of the device-specific information 10 in the device medium information storage buffer 140, the learning parameter is used in a smaller range than the default using the learning result 13, for example, with the learning result 13 as the center. If there is no device unique information 10 having the same device identifier 12, there is a default value, for example, the learning parameters are assigned in a default range around the default value, and OPC is executed (step 402).
[0058]
The learning result obtained by the OPC is reflected on the device unique information 10, and the plurality of device unique information 10 in the device medium information storage buffer 140 are arranged in chronological order (step 403).
[0059]
The area of the OPC area 7 used by the OPC is reflected on the available position 14 of the OPC area of the medium unique information 11 in the apparatus medium information storage buffer 140 (step 404).
[0060]
The update flag 21 in the device medium information control memory 165 is set so as to indicate that the contents of the device medium information storage buffer 140 have been changed.
By referring to the previous learning result 13 of the device itself, the OPC area consumed in one learning may be reduced, or the learning may be performed with higher accuracy with the same OPC area consumption. Alternatively, the time required for OPC may be reduced. Any previous learning result 13 may be used as long as OPC can be performed more efficiently.
[0061]
FIG. 11 is a flowchart showing the operation of the data area management unit 164 according to Embodiment 2 of the present invention.
The data area indicated by the recording length (RL) is recorded from the recording start position (SRA) (step 501).
[0062]
If the recording start position (SRA) is larger than the position next to the last recording position (LRA) of the data area, that is, if an unrecorded area remains between LRA and SRA (502), the device medium information storage buffer 140 The update flag 21 is set so that the content is recorded in the device medium information area 9 to be used next to the device medium information additional recording area 8 (step 503).
[0063]
If the value obtained by adding the recording start position (SRA) and the recording length (RL) is larger than the position next to the last recording position (LRA) in the data area (step 504), the step moves to the last recording position (LRA) in the data area. The last recording position recorded at 501 is set (step 505).
[0064]
The difference between the last recording position (LRA) of the data area in the apparatus medium information storage buffer 140 and the LRA (FLRA) recorded in the apparatus medium information area 9 of the apparatus medium information additional recording area 8 of the disk medium 1 is a predetermined value. If it exceeds (step 506), the update flag 21 is set so that the contents of the apparatus medium information storage buffer 140 are recorded in the apparatus medium information area 9 to be used next to the apparatus medium information additional recording area 8 (step 507).
[0065]
Note that the update flag 21 may be set if the data area 7 is recorded even once. However, the device medium information area 9 of the device medium information additional recording area 8 is also limited in number. Therefore, in the flowchart shown in FIG. 11, the condition for setting the update flag 21 is that, when the disk medium 1 is mounted, the data area starting from the last recording position 15 of the data area acquired from the apparatus medium information area 9 is used as a starting point. 7 can be searched correctly (for example, the search operation shown in FIG. 9 can be applied to the data area). Specifically, (1) no unrecorded area remains between the last recording position 15 of the data area acquired from the apparatus medium information area 9 and the actual recording end position of the data area 7; That is, the actual recording end position of the data area 7 exists within a range of a predetermined value from the last recording position 15 of the data area acquired from the medium information area 9. The above (2) is not an indispensable condition, but is important for completing a search within a reasonable time.
[0066]
Assuming that (predetermined value) of step 506 is N where (size of data area 5) ９ (total number of apparatus medium information areas 9 allocated to apparatus medium information additional recording area 8), a value less than N, for example, an integer of N To 1.
[0067]
FIG. 12 is a flowchart illustrating the operation of the device medium information updating unit 162 according to Embodiment 2 of the present invention.
With reference to the position 22 of the device medium information in the device medium information control memory 165, it is updated to the next available position (step 601), and the contents of the device medium information storage buffer 140 are stored in the device medium information area 9 at that position. Recording is performed (step 602), the update flag 21 is cleared (step 603), and the last recording position (LRA) 15 of the data area is set in the LRA (FLRA) 23 reflected on the medium (step 604).
[0068]
As described above, according to the second embodiment of the present invention, the write-once recording medium described in the first embodiment of the present invention can be recorded and reproduced. Further, the OPC result and the recording state of the data area are reflected all at once for a data recording request requiring the OPC, and the final recording position of the data area described in the device medium information area on the medium and the actual final By allowing the difference in the recording position, the consumption of the device medium information additional recording area can be suppressed. Further, it is possible to provide an information recording / reproducing apparatus which can search for the actual final recording position in the data area within a reasonable time.
[0069]
Note that the operation of setting the LRA in the FLRA in step 604 is related to the operation of the data area management unit 164 (step 506), and this paired operation may be omitted as necessary.
[0070]
In the description of the present invention, the layout of each area is merely an example. For example, even if the radial positions of the OPC area 7 and the device medium information additional recording area 8 are reversed, they are arranged so as to be included in the lead-out area 6. I do not care.
[0071]
In the description of the present invention, the order of use in each area is merely an example. For example, the OPC area 7 may be used in order from the inner circumference, and the apparatus medium information additional recording area 8 may be used in order from the outer circumference.
[0072]
In the description of the present invention, the configuration blocks and operations of the apparatus are merely examples, and any algorithm may be used as long as the data structure recorded on the medium matches.
[0073]
Such modifications do not depart from the spirit and scope of the invention, and modifications that are obvious to those skilled in the art are intended to be included within the scope of the appended claims.
[0074]
【The invention's effect】
According to the write-once recording medium of the present invention, the device-specific information 10 including the device-specific learning result and the medium-specific information 11 including the use status of the medium-specific OPC area and the recording status of the data area are stored in the same area. By recording in the area, it is possible to improve the use efficiency of the area and to speed up the search for the latest information in the area. Furthermore, as the recording condition of the data area described in the medium unique information 11, by allowing the unrecorded area to be included on the inner peripheral side from the last recording position of the data area, recording can be performed at a random place. .
[0075]
According to the information recording / reproducing method and the information recording / reproducing apparatus of the present invention, the above-mentioned write-once recording medium can be recorded and reproduced. Further, the OPC result and the recording state of the data area are reflected at once for the data recording request that requires the OPC, and the final recording position of the data area described in the device medium information area on the medium and the actual final By allowing the difference in the recording position, the consumption of the device medium information additional recording area can be suppressed. Further, it is possible to provide an information recording / reproducing apparatus which can search for the actual final recording position in the data area within a reasonable time.
[Brief description of the drawings]
FIG. 1 is an area configuration diagram of an optical disc according to Embodiment 1 of the present invention.
FIG. 2 is a diagram showing a data structure of an apparatus medium information area 9 according to the first embodiment of the present invention.
FIG. 3 is a diagram showing an example of a change in content of a device medium information area 9 according to a recording state of an OPC area 7 according to the first embodiment of the present invention.
FIG. 4 is a diagram showing an example of a change in content of an apparatus medium information area 9 according to a recording state of a data area 5 according to the first embodiment of the present invention.
FIG. 5 is a configuration diagram of an optical disc device 100 according to a second embodiment of the present invention.
FIG. 6 is a diagram showing a relationship between each area of the disk medium 1 and each component of the optical disk device 100 according to the second embodiment of the present invention.
FIG. 7 is a flowchart showing an operation of the disk device 100 according to the second embodiment of the present invention.
FIG. 8 is a flowchart showing the operation of the device medium information reading unit 161 according to the second embodiment of the present invention.
FIG. 9 is a diagram showing an operation in which the apparatus medium information reading unit 161 according to the second embodiment of the present invention searches for the last recorded apparatus medium information area 9;
FIG. 10 is a flowchart illustrating an operation of a learning processing unit 163 according to the second embodiment of the present invention.
FIG. 11 is a flowchart showing the operation of the data area management unit 164 according to the second embodiment of the present invention.
FIG. 12 is a flowchart showing the operation of the device medium information updating unit 162 according to the second embodiment of the present invention.
[Explanation of symbols]
1 disk medium
2 tracks
3 blocks
4 Lead-in area
5 Data area
6 Lead-out area
7 OPC area
8 Device media information additional recording area
9 Device media information area
10 Device-specific information
11 Medium-specific information
12 Device identifier
13 Learning results
14 Available position of OPC area
15 Last recording position of data area
21 Update flag
22 Location of device media information
23 LRA reflected on media
100 Optical disk drive
110 Instruction processing unit
120 Recording control unit
130 Playback control unit
140 Device media information storage buffer
150 data buffer
160 Device media information processing unit
161 Device medium information reading unit
162 Device media information update unit
163 Learning processing unit
164 Data area management unit
165 Device media information control memory
170 I / O bus

Claims (30)

A write-once recording medium that performs recording and reproduction in block units,
A data area for recording data, and a device information additional recording area for recording device-specific information,
The device information additional area has an area to which a plurality of device information areas can be allocated, and the apparatus information area is recorded in order from one end of the area,
The device information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for a maximum of M devices, and a new device having a new time recorded on the write-once recording medium. A write-once recording medium, wherein the device-specific information is arranged in order. A write-once recording medium that performs recording and reproduction in block units,
A data area for recording data, and a device medium information additional recording area for recording device-specific information and medium-specific information,
The device medium information additional recording area has an area to which a plurality of device medium information areas can be allocated, and the apparatus medium information area is recorded in order from one end of the area,
The device medium information area is at least one block, M is an integer of 2 or more, and an area in which the device unique information for up to M devices can be stored, and an area in which the medium unique information can be stored. Wherein the device-specific information is arranged in the order of the device having the latest time recorded on the write-once recording medium. 2. The write-once recording medium according to claim 1, wherein M is a power of two. 3. The write-once recording medium according to claim 2, wherein M is a value obtained by subtracting 1 from a power of 2. The write-once recording medium according to claim 1, wherein the device-specific information is information used by a device capable of mounting the write-once type recording medium when recording and reproducing the data area. 3. The write-once recording medium according to claim 2, wherein the medium-specific information includes information on a last recording position of the data area. The write-once recording medium further includes an OPC area for learning an optimal recording condition,
3. The write-once recording medium according to claim 2, wherein the medium-specific information includes information on a usable position of the OPC area. 3. The write-once recording medium according to claim 1, wherein the block unit is an error correction unit. 3. The write-once recording medium according to claim 2, wherein the medium-specific information includes information on a position that does not include an unrecorded area between the data area and the last recorded position. 3. The write-once recording medium according to claim 2, wherein the medium-specific information includes information of a position within a predetermined range from a last recording position of the data area. An information recording and reproducing method for a write-once recording medium that performs recording and reproduction in block units,
The write-once recording medium,
A data area for recording data, and a device information additional recording area for recording device-specific information,
The device information additional area has an area to which a plurality of device information areas can be allocated,
The device information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for up to M devices,
The information recording and reproducing method,
(A) reading the last recorded device information area;
(B) If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproduction is performed using the device-specific information. If not, learning defaults;
(C) arranging the device-specific information having its own learning result at the top of a maximum of M pieces of the device-specific information;
(D) recording contents including a maximum of M pieces of the device-specific information in the device information area which is unrecorded and located at one end in the device information additional recording area. Information recording and reproduction method. An information recording and reproducing method for a write-once recording medium that performs recording and reproduction in block units,
The write-once recording medium,
A data area for recording data, an apparatus medium information additional recording area for recording apparatus-specific information and medium-specific information, and an OPC area for learning optimal recording conditions;
The device medium information additional recording area has an area to which a plurality of device medium information areas can be allocated,
The device medium information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for up to M devices and the medium-specific information,
The information recording and reproducing method,
(A) reading the last recorded device medium information area;
(E) determining an OPC area available for learning from the medium-specific information;
(B) If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproduction is performed using the device-specific information. If not, learning defaults;
(C) arranging the device-specific information having its own learning result at the top of a maximum of M pieces of the device-specific information;
(F) writing the position of the OPC area used for learning in step (e) in the medium-specific information;
(D) recording contents including a maximum of M pieces of the device-specific information and the medium-specific information in the device-medium information area that is unrecorded and located at one end in the device-medium information additional recording area; And an information recording / reproducing method. An information recording and reproducing method for a write-once recording medium that performs recording and reproduction in block units,
The write-once recording medium,
A data area for recording data, an apparatus medium information additional recording area for recording apparatus-specific information and medium-specific information, and an OPC area for learning optimal recording conditions;
The device medium information additional recording area has an area to which a plurality of device medium information areas can be allocated,
The device medium information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for up to M devices and the medium-specific information,
The information recording and reproducing method,
(A) reading the last recorded device medium information area;
(E) obtaining an OPC area available for learning from the medium-specific information;
(G) obtaining a final recording position of a data area from the medium unique information;
(B) If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproduction is performed using the device-specific information. If not, learning defaults;
(C) arranging the device-specific information having its own learning result at the top of a maximum of M pieces of the device-specific information;
(F) writing the position of the OPC area used for learning in step (e) in the medium-specific information;
(H) writing, in the medium-specific information, a final recording position changed by recording in the data area;
(D) recording contents including a maximum of M pieces of the device-specific information and the medium-specific information in the device-medium information area that is unrecorded and located at one end in the device-medium information additional recording area; And an information recording / reproducing method. The information recording / reproducing method according to claim 11, wherein M is a power of two. 14. The information recording / reproducing method according to claim 12, wherein M is a value obtained by subtracting 1 from a power of 2. 14. The information recording / reproducing method according to claim 11, wherein the block unit is an error correction unit. 14. The information recording / reproducing method according to claim 11, wherein step (d) is performed immediately before the write-once recording medium is ejected from the apparatus. 14. The information recording / reproducing method according to claim 11, wherein the step (d) is performed after a period during which recording / reproducing is not performed on the write-once recording medium continues for a predetermined time or more. 14. The information according to claim 13, wherein in the step (h), when the data recording is started from the last recording position before the data recording with an unrecorded area interposed therebetween, the step (d) is executed. Recording and playback method. If the difference between the last recording position of the current data area and the last recording position of the data area when the step (d) was previously executed exceeds a predetermined range, the step (d) is executed. 14. The information recording / reproducing method according to claim 13, wherein the method is performed. An information recording and reproducing apparatus for a write-once recording medium that performs recording and reproducing in block units,
The write-once recording medium,
A data area for recording data, and a device information additional recording area for recording device-specific information,
The device information additional area has an area to which a plurality of device information areas can be allocated,
The device information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for up to M devices,
The information recording and reproducing device,
(A) means for reading the device information area recorded last;
(B) If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproduction is performed using the device-specific information. If not, there is a default learning method,
(C) means for arranging the device-specific information having the content of its own learning result at the top of a maximum of M pieces of the device-specific information;
(D) means for recording contents including a maximum of M pieces of the device-specific information in the device information area which is unrecorded and located at one end in the device information additional recording area. Information recording and reproducing device. An information recording and reproducing apparatus for a write-once recording medium that performs recording and reproducing in block units,
The write-once recording medium,
A data area for recording data, an apparatus medium information additional recording area for recording apparatus-specific information and medium-specific information, and an OPC area for learning optimal recording conditions;
The device medium information additional recording area has an area to which a plurality of device medium information areas can be allocated,
The device medium information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for up to M devices and the medium-specific information,
The information recording and reproducing device,
(A) means for reading the last recorded device medium information area;
(E) means for determining an OPC area available for learning from medium-specific information;
(B) If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproduction is performed using the device-specific information. If not, there is a default learning method,
(C) means for arranging the device-specific information having the content of its own learning result at the top of a maximum of M pieces of the device-specific information;
(F) means for writing the position of the OPC area used for learning in the means (e) in the medium specific information;
(D) means for recording contents including a maximum of M pieces of the device-specific information and the medium-specific information in the device-medium information area that is unrecorded and located at one end in the device-medium information additional recording area. An information recording / reproducing device comprising: An information recording and reproducing apparatus for a write-once recording medium that performs recording and reproducing in block units,
The write-once recording medium,
A data area for recording data, an apparatus medium information additional recording area for recording apparatus-specific information and medium-specific information, and an OPC area for learning optimal recording conditions;
The device medium information additional recording area has an area to which a plurality of device medium information areas can be allocated,
The device medium information area is at least one block, M is an integer of 2 or more, and can store the device-specific information for up to M devices and the medium-specific information,
The information recording and reproducing device,
(A) means for reading the last recorded device medium information area;
(E) means for acquiring an OPC area available for learning from the medium-specific information;
(G) means for obtaining a final recording position of a data area from the medium specific information;
(B) If there is a maximum of M pieces of the device-specific information recorded by itself, learning necessary for recording / reproduction is performed using the device-specific information. If not, there is a default learning method,
(C) means for arranging the device-specific information having the content of its own learning result at the top of a maximum of M pieces of the device-specific information;
(F) means for writing the position of the OPC area used for learning in the means (e) in the medium specific information;
(H) means for writing the final recording position changed by recording in the data area in the medium specific information;
(D) means for recording contents including a maximum of M pieces of the device-specific information and the medium-specific information in the device-medium information area that is unrecorded and located at one end in the device-medium information additional recording area. An information recording / reproducing device comprising: 22. The information recording / reproducing apparatus according to claim 21, wherein M is a power of two. 14. The information recording and reproducing apparatus according to claim 12, wherein M is a value obtained by subtracting 1 from a power of 2. 24. The information recording / reproducing apparatus according to claim 21, 22, or 23, wherein the block unit is a unit of error correction. 24. The information recording / reproducing apparatus according to claim 21, wherein the means (d) is executed immediately before the write-once recording medium is ejected from the apparatus. 24. The information recording / reproducing apparatus according to claim 21, wherein the means (d) is executed after a period during which recording / reproducing is not performed on the write-once type recording medium continues for a predetermined time or more. 24. The method according to claim 23, wherein in the means (h), when the data recording is started from the last recording position before the data recording with the unrecorded area interposed therebetween, the means (d) is executed. Information recording and playback device. When the difference between the last recording position of the current data area and the last recording position of the data area when the means (d) was previously executed exceeds a predetermined range, the means (d) executes the execution. The information recording / reproducing apparatus according to claim 23, wherein the information recording / reproducing apparatus is performed.

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