JP4576744B2 - Recording medium and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording medium, and Made How to make To the law In particular, a disc recording medium in which address information is recorded by preformatting, and manufacture of the disc recording medium. To make Related.
[0002]
[Prior art]
In recent years, with the rise of so-called multimedia, large volumes of data such as digital still images and moving images have been handled. Such data is stored in a recording medium such as an optical disk, and is reproduced by random access as necessary. An optical disk has a higher recording density than a magnetic recording medium such as a floppy disk, and can be rewritten in a magneto-optical disk. Therefore, the optical disk is widely used as a randomly accessible recording medium as described above.
[0003]
For example, as such a recording medium, there is a recording medium such as a so-called MD (product name of Sony Corporation) (hereinafter referred to as a first format), and a track is formed (preformatted) in advance during molding of the manufacturing process. ing.
[0004]
As an example of such a recording medium, a disk 10 is shown in FIG. The tracks of the disk 10 are formed (engraved) in a spiral shape from the inner circumference side to the outer circumference side with a track pitch of 1.6 μm, for example. Then, a lead-in area 10a is formed in a width of, for example, about 1.5 mm from the track on the innermost circumference side of the disc to the outer circumference direction, and a recordable area 10b is formed on the outer side to occupy most of the disc. Yes. Further, a lead-out area 10c is formed on the outermost periphery side with a width of about 0.5 mm, for example. The tracks thus formed are divided into sectors, which are recording units having a length of, for example, about 16 mm in the track direction from the inner periphery of the lead-in area 10a to the outer periphery of the recordable area 10b, and recording is performed in units of 36 sectors. A cluster that is a block is configured.
[0005]
As shown in FIG. 27, each cluster is assigned a continuous cluster number such as N−1, N, N + 1,..., And each sector constituting one cluster is, for example, an FC in hexadecimal number. 1F sector numbers are assigned. The address information (hereinafter referred to as sector address) of the recording medium is configured by combining the cluster number and the sector number assigned in this way.
[0006]
In addition, recording and reproduction of data on such a recording medium is performed with a cluster as a minimum unit. Specifically, the sector FC of the target cluster is accessed and recording or reproduction is started from the center of the sector FD. Data is continuously recorded or reproduced over a length corresponding to 36 sectors until recording or reproduction is completed at the center of the sector FD of the next cluster. For example, in the recording medium of the first format, since error correction code interleaving is not completed within a sector, the above FC to FE sectors cannot record data, and in fact, 32 sectors of sectors 0 to 31 (1F). Data is recorded only in minutes.
[0007]
The cluster number is defined such that the cluster located at the innermost periphery of the recordable area is 0, and each cluster number is counted up toward the outer periphery. Further, the cluster number of the cluster located at the outermost periphery of the lead-in area is set to −1, and each cluster number is defined to count down toward the inner periphery. These cluster number and sector number constitute a sector address over the entire recording medium.
[0008]
By the way, the recording format of the address information is different in each area of the track. The address information of the track in the recordable area and the lead-out area is recorded by a groove shape called a groove. However, since the data in the track in the lead-in area is recorded only by the pit shape, the address information is also recorded by the pit shape.
[0009]
The track in the lead-in area records data according to the pit shape, and the data is recorded by a recording signal based on the reflectance of the laser beam irradiated on the track. The address information is recorded by interleaving (mixing) the recording signal. The details are shown below.
[0010]
As shown in FIG. 28, one sector of the first format is composed of a structural unit called 98 frames, and each frame has a frame synchronization pattern at the head, followed by sub-coding information of 8 bits (1 byte), Subsequently, 32-bit main data including the parity of the error correction code is recorded. The address information is recorded in the subcoding information S0 to S97. However, since the sub-coding information S0 and S1 is used as a synchronization signal indicating the head of the sector, the actual data is the remaining 96 pieces of sub-coding information S2 to S97 excluding them. Eight types of 96-bit information of P, Q, R, S, T, U, V, and W are configured by collecting each bit of the 96 sub-coding information, and Q is the second sub-coding information. Address information is recorded in a channel (hereinafter referred to as subcode Q). The structure of the subcode Q is shown in FIG.
[0011]
That is, the subcode Q is configured in the order of 56 bits of 0 from the top, 16 bits of cluster number, 8 bits of sector number, and 16 bits of check code (CRC). These form address information for specifying each sector on the disk, and each sector can be accessed.
[0012]
On the other hand, the track of the recordable area and the lead-out area has a groove shape called a groove as shown in FIG. This groove shape slightly meanders in a direction orthogonal to the track scanning direction according to address information by a signal that is FM-modulated with a center frequency of 22.05 kHz called a so-called ADIP (ADress In Pre-groove) signal. ing. By the meandering of the groove, a reference signal for controlling the rotational speed of the disk is formed, and address information is FM-modulated and recorded. The address information recorded in the ADIP signal in this way has a configuration as shown in FIG.
[0013]
That is, the synchronization signal sync for 4 bits from the top, the cluster number for 16 bits, the sector number for 8 bits, and the CRC for 14 bits are arranged in this order. These form address information (sector address) for specifying each sector on the disk, and access to each sector is possible. The ADIP signal of each sector configured as described above is FM-modulated so as to have a sector length and continuously recorded on the track.
[0014]
As described above, the recording method of the address information is different between the lead-in area, the recordable area, and the lead-out area.
[0015]
The procedure for accessing an arbitrary target sector on the disk configured as described above is shown in the flowchart of FIG. In step S30, the subcode Q or ADIP signal is read from the pit shape or groove shape at the current position of the optical head to obtain the address of the current position. In step S31, the distance to the target sector (address) is calculated from the address of the current position obtained in step S30. In step S32, the optical head (hereinafter referred to as “OP”) is moved in the radial direction of the recording medium with the target within one round before the disk from the target sector. In step S33, the subcode Q or ADIP signal at the current position after the OP movement is read to obtain the address of the current position. In step S34, it is determined from the address obtained in step S33 whether or not the current sector has been reached within one round before the target sector. If not, the process returns to step S31, and steps S31 to S34 are repeated. If the target sector has been reached within one round before, in step S35, the track is traced while monitoring the address until the target sector is reached by the rotation of the disk. When the target sector is reached, data recording or reproduction is executed. To do.
[0016]
As described above, when accessing an arbitrary target sector, the address information is an extremely important role because the movement distance of the OP to the target sector is calculated based on the address information recorded on the disk. Take on.
[0017]
As described above, in the recording medium of the first format, the address information is recorded by the subcode Q in the lead-in area and by the ADIP signal in the recordable area and the lead-out area. By adopting such a configuration, there are the following features.
[0018]
That is, it is not necessary to perform formatting work before using the disk as in the case of a floppy disk. This is because the address information is engraved in advance when the disc is molded. In addition to the address information based on the subcode Q, various information can be recorded as main data information in the lead-in area. For example, in the recording medium of the first format, it is possible to record useful information at the time of disk access and recording, such as the start address, end address, and optimum recording power of the recordable area. Further, at the time of disc molding, a part of the recordable area can be configured with a pit shape similar to that of the lead-in area to record main data. As a result, a hybrid disc having a read-only area can be realized while being a recordable disc. Further, in the recordable area, the groove is FM-modulated and the address information is recorded, so that the recording capacity can be maximized without providing a special recording area for the address information. Further, stable servo control can be realized without interruption of the servo signal.
[0019]
[Problems to be solved by the invention]
By the way, due to recent technological advancement, high-density recording technology represented by magnetic super-resolution (MSR) technology has entered the age of practical use, and the recording density by magneto-optical recording greatly exceeds the recording density by pits. It became so. For this reason, it has become difficult to form a pit area and a groove area on the same disk employing a high-density recording technique.
[0020]
However, when a disc is formed by only the groove area without providing the pit area, there is no area for recording information recorded by the pits at the time of disc molding. For this reason, there arises a problem that information such as optimum recording power cannot be recorded.
[0021]
In view of the above-described problems, the present invention provides a method and means for recording additional information such as the optimum recording power as described above while maintaining compatibility with the conventional address signal. It is another object of the present invention to provide a method and means for recording additional information without deteriorating access performance. It is another object of the present invention to provide a method and means for designating a usage form in advance for all or a part of a medium that is a recordable medium.
[0022]
[Means for Solving the Problems]
In order to solve the above-described problem, a recording medium according to the present invention is a recording medium in which address information is arranged in advance according to a predetermined rule, and information is reproduced based on the address information. The address information is composed of a number for each sector and a number for each cluster composed of a plurality of sectors, and the number for each cluster is composed of upper bits and lower bits, and is stored in the lead-in area of the recording medium. Is recorded with a first address signal composed of the address information and a second address signal in which the number of each lower-order cluster in the address information is replaced with additional information. 2 address signals are recorded intermittently .
[0023]
Such a recording medium is configured to reproduce an address signal in which additional information is added to address information arranged according to a predetermined rule. As a result, an address signal with additional information is recorded on the recording medium.
[0026]
In addition, in order to solve the above-described problem, the recording medium manufacturing method according to the present invention is a recording medium in which address information is arranged in advance according to a predetermined rule, and information is reproduced based on the address information. In a method for manufacturing a recording medium for manufacturing a medium, The address information is composed of a number for each sector and a number for each cluster composed of a plurality of sectors, and the number for each cluster is composed of an upper bit and a lower bit, and is stored in the lead-in area of the recording medium. The first address signal composed of the address information and the second address signal in which the number for each cluster corresponding to the lower bits in the address information is replaced with additional information are recorded. Has a recording process Shi , In the recording step, the second address signal is intermittently recorded. .
[0027]
In such a recording medium manufacturing method, an address signal in which additional information is added to address information arranged according to a predetermined rule is recorded on the recording medium.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a recording medium according to a first embodiment of the present invention will be described in detail with reference to the drawings. In the recording medium of the first embodiment, the address signal of the recording medium according to the present invention is applied to the recording medium of the second format whose recording density is higher than that of the recording medium of the first format such as a conventional so-called MD. It is applied. Note that the recording medium of the first embodiment is not limited to the second format, and may be another format.
[0033]
The recording area of the recording medium of the first embodiment is basically configured in the same manner as the prior art of FIG. That is, a lead-in area 10a is formed in the outer circumferential direction from a track on the innermost circumference side of the disk 10, and a recordable area 10b is formed on the outer side, which occupies most of the track. Further, a lead-out area 10c is formed on the outermost peripheral side.
[0034]
The following points can be cited as points different from the prior art. That is, the lead-in area 10a is formed in a groove shape like the recordable area 10b, and the sizes and structures of the sectors and clusters are changed. The former is because it has become difficult to form the lead-in area 10a in a pit shape. The latter is accompanied by an increase in recording density and a change in error correction method.
[0035]
The track of the recording medium of the first embodiment is divided into sectors having a length of about 6 mm, for example, from the inner periphery of the lead-in area 10a to the outer periphery of the recordable area 10b. Composed. The configuration of sectors and clusters configured in this manner will be described in detail below.
[0036]
FIG. 1 shows an example of sectors and clusters constituting the recording medium of the second format. Each cluster is assigned a continuous cluster number such as N-1, N, N + 1,..., And one sector is composed of 16 sectors assigned numbers 0 to 15 (F). ing. Address information (hereinafter referred to as sector address) recorded for each sector is composed of a sector number and a cluster number, and all 16 cluster numbers of sector addresses in the same cluster are the same number. When the recording medium configured as described above is accessed and data is recorded or reproduced, a cluster is the minimum unit.
[0037]
In the recording medium of the second format, the error correction code interleaving is completed in units of clusters. Here, assuming that the cluster N is a target cluster, at the time of recording or reproduction, the sector 15 (F) of the cluster N-1 immediately before is accessed, recording or reproduction is started from the sector 0 of the cluster N, and the sector of the cluster N Data is continuously recorded or reproduced over a length of 16 sectors up to 15 (F). In the recording medium of the second format, since error correction code interleaving is completed in units of clusters, sectors 0 to 15 (F) are continuously accessed for both recording and reproduction.
[0038]
The cluster number is assigned such that the cluster located at the innermost periphery of the recordable area is 0, and each cluster number is counted up toward the outer periphery. Further, the cluster number of the cluster located at the outermost periphery of the lead-in area is set to −1, and each cluster number is assigned to be counted down toward the inner periphery. These cluster number and sector number constitute a sector address over the entire recording medium.
[0039]
The ADIP signal of the recording medium of the second format is FM modulated with a center frequency of 84.672 kHz, thereby forming a reference signal for controlling the rotational speed of the disk and address information being FM modulated. It is recorded. The address information that should be originally recorded in the ADIP signal of the recording medium of the second format has a configuration as shown in FIG.
[0040]
That is, it consists of 42 bits in the order of 4 bits of synchronization signal sync (synchronization signal) from the top, 16 bits of cluster information, 4 bits of sector information, and 18 bits of BCH parity ((error correction code)). These form address information for specifying each sector on the disk, and each sector can be accessed.
[0041]
Here, when the second format is compared with the first format, the bit configuration of the ADIP signal and the center frequency of FM modulation are different. However, otherwise, the modulation scheme and the total number of bits are the same as in the first format. Moreover, it is the same as MD DATA2 (MD2), which is a second generation MD already in practical use.
[0042]
The procedure for accessing an arbitrary sector on the disk configured as described above is the same as the procedure described with reference to the flowchart of FIG. Therefore, the address information of the ADIP signal recorded on the disc is still important as in the prior art.
[0043]
Next, the address recognition mechanism will be described in detail. FIG. 3 is a timing chart showing the timing when accessing the vicinity of the sectors M−1 to M + 1. As described above, the address information of each sector is configured in the order of the sync signal sync, the cluster number, the sector number, and the parity (CRC). In each ADIP signal, the time when the synchronization signal sync is detected is regarded as a sector boundary, and the sector synchronization pulse Ps is generated. Next, acquisition of address information from the ADIP signal is started by each sector synchronization pulse Ps. The address information is read in the order of the cluster number, sector number, and parity, and whether the address information is correct or incorrect is determined. In FIG. 3, for the sake of convenience, the cluster boundary is set between the synchronization signal sync and the cluster number.
[0044]
If the address information is determined to be correct in the address information correct / incorrect determination, the acquired address information is recognized as data of the correct address information. If the address information is determined to be in error, interpolation processing is performed based on the continuity of the preceding and following address information by an error correction circuit as an interpolation means, and the incorrect address information is replaced with the correct value that should be originally It is done. If the error correction circuit determines that the address information is correct but the obtained address is different from the expected value, it is determined that a jump to the adjacent track has occurred, and the trace operation is immediately stopped. Error processing is executed. Note that the interpolation means may be configured by software having an error correction function as a so-called object.
[0045]
The address information recognized by the above procedure is determined by the next sector synchronization pulse Ps, and a sector address is generated. When this sector address is obtained, it has already passed through that sector, so the synchronization pulse Ps that has confirmed this sector address also means the start of the next sector. Similarly, acquisition of the next address information is started from the subsequent ADIP signal. In this way, address information is recognized each time and a sector address is generated.
[0046]
Further, the synchronization signal sync of the ADIP signal has a special pattern so that it can be clearly distinguished from other data. However, in order to prevent an erroneous determination, a predetermined detection window Ws is provided. That is, the detection window Ws is provided so that the time from the sector synchronization pulse once generated to the next synchronization pulse is measured by a timer or the like, and the synchronization signal sync is detected only at a predetermined timing. For this reason, a device is incorporated such that a false sync signal sync pattern generated at a timing other than the detection window Ws is eliminated.
[0047]
Next, the role of the sector number will be described. As described above, in each sector arranged on the track, sectors 0 to 15 (F) are periodically and repeatedly recorded. Based on the continuity of the address, an interpolation unit can determine an error in the address information and perform an interpolation process. That is, as shown in the timing chart of FIG. 4, when the sector synchronization pulse Ps is detected, an address counter that counts up from 0 to 15 (F) is provided in the same manner as the actual sector address, and the address counter is obtained. The validity of the address information is constantly monitored by comparing the address information. As a result of the comparison, when an error occurs in the address information (determined as an error), interpolation processing of the address information in which the error has occurred is executed based on the value of the address counter.
[0048]
The sector number is also used to generate a cluster synchronization pulse Pc indicating a cluster boundary. That is, the cluster synchronization pulse is generated by the next synchronization signal sync in which the sector 15 (F) is detected.
[0049]
As described above, the sector number is always compared with the address counter, and is important for monitoring the validity of the sector address. The sector number is also used to generate a cluster synchronization pulse.
[0050]
Next, cluster number assignment will be described. In the recording medium of the first embodiment, as described above, a negative cluster number is assigned to the cluster in the lead-in area, and a positive cluster number is assigned to the cluster in the recordable area and the lead-out area. Of these, address information is recorded in the area where the cluster number is 0 or positive, that is, the recordable area and the lead-out area by the ADIP signal as in the past, and the access performance and the access method are for the conventional recording medium. And no different.
[0051]
In the address recognition mechanism described above, the synchronization signal sync and the sector number play an important role in disk synchronization control, and thus are indispensable. Therefore, it is difficult to replace the sector number of the ADIP signal with other additional information. On the other hand, as described above, the same cluster number is recorded over 16 sectors in the ADIP signal in the same cluster.
[0052]
Therefore, the embodiment according to the present invention provides a method and means for replacing the cluster number in the ADIP signal with other additional information. However, since it is necessary to distinguish the lead-in area from other areas, it is necessary to leave the MSB (Most Significant Bit) of the cluster number. In the recording medium of the first embodiment described below, the performance sufficient to realize access to each sector is realized while recording information other than address information in the ADIP signal of each sector.
[0053]
The In the area where the raster number is negative, that is, the ADIP signal in the lead-in area, additional information such as the lead-out start address and recording power is recorded in addition to the address information based on the embodiment of the present invention described below. Yes. Here, in the recording medium according to the present invention, the length of one cluster in the lead-in area substantially corresponds to one rotation of the disk.
[0054]
FIG. 6 shows a configuration example of the ADIP signal in the first embodiment. This ADIP signal is composed of two types of ADIP signals of type A and type B shown in FIG. In Type A, exactly the same as the original ADIP signal, the sync signal sync is 4 bits, the cluster number is the upper 8 bits (cluster number H) and the lower 8 bits (cluster number L). It consists of 42 bits for 4 bits, sector number for 4 bits, and BCH parity (error correction code) 18 bits. In type B, the sync signal sync is 4 bits, the cluster number is replaced with the upper 8 bits (cluster number H) as part of the address information, and the lower 8 bits (cluster number L) of the cluster number. Is composed of 42 bits for 8 bits and 4 bits for the sector number.
[0055]
The type A and type B ADIP signals are arranged with regularity as shown in FIG. That is, for example, type A ADIP signals are intermittently arranged and recorded in sectors 7 and 15 (F), and types B ADIP signals are intermittently arranged and recorded in sectors 0 to 6 and sectors 8 to 14 (E). Fourteen type B additional information bytes in one cluster are collected to form a total of 14 bytes of additional information records. As shown in FIG. 7, the additional information includes, for example, a disk type, an attribute code, a user area start address, a lead-out area start address, a servo signal correction value, a reproduction laser power upper limit value, a reproduction laser power linear velocity correction coefficient, and a recording laser. Power upper limit value, recording laser power linear velocity correction coefficient, recording magnetic field sensitivity, magnetic field-laser pulse phase difference , Various information including optimal parameters for recording / reproducing the recording medium, such as parity, can be considered. These are repeatedly recorded over all clusters in the lead-in area. In this way, address information in the same cluster is intermittently replaced with additional information. The additional information is not limited to that described above.
[0056]
An access method for accessing a specific sector in the lead-in area for the disk of the recording medium of the present embodiment having the above-described configuration will be described with reference to FIG.
[0057]
In step S1, the cluster number is read from the ADIP signal at the current position by OP. Next, in step S2, it is determined whether the most significant bit of the read cluster number is 0 or 1 (whether the cluster number is a negative number). If the most significant bit is 0, the cluster number is a positive number, that is, the current track is a recordable area. Therefore, since the read ADIP signal can be used as address information as it is, the relative distance from the target sector is calculated in step S7 described later.
[0058]
In step S2, if the most significant bit of the cluster number is 1, the cluster number is a negative number, that is, the current track is the lead-in area. Therefore, additional information may be recorded in the lower 8 bits of the cluster number, so the sector number is referred to in step S3. If the sector number is 7 or 15, the read ADIP signal can be used as address information as it is, so the relative distance from the target sector is calculated in step S7 described later. If the sector number is other than 7 and 15, the process proceeds to step S4. Here, the above steps S1 to S3 are performed by a discriminating means for discriminating address information and additional information. For example, the determination unit is specifically realized by a program, and is configured as a so-called object, for example. It can also be configured by hardware.
[0059]
In step S4, the upper 8 bits of the cluster number of the target sector and the cluster number of the current position read in step S1 are compared. If they match, the process proceeds to step S6. If not, an approximate value of the relative distance is calculated in step S5, and the process proceeds to step S9 described later.
[0060]
In step S6, the lower 8 bits of the cluster number are read by tracing until sector 7 or 15 is reached, and after obtaining complete address information, the process proceeds to step S7. In step S7, an accurate relative distance to the target sector is calculated from the complete address information obtained in step S6, and the process proceeds to step S8.
[0061]
In step S8, it is determined whether or not the current position is within one rotation before the target sector from the accurate relative distance calculated in step S7. If the current position is not within one rotation before, the process proceeds to step S9. In step S9, an OP track jump is performed using the relative distance calculated in step S5 or the relative distance calculated in step S7, and the processing from step S1 is performed again on the jump destination track. If it is determined in step S8 that the current position is within one rotation before the target sector, the process proceeds to step S10. In step S10, the target sector can be traced as it is to access the target sector.
[0062]
Here, in general, an access operation in a disk medium medium is configured by a combination of a seek operation time and a rotation waiting operation. The seek operation is an operation until the track position is determined by moving the optical head, which is a recording means and a reproducing means, in the radial direction. The rotation waiting operation is an operation until the target sector reaches the optical head position by the rotation of the disk after the track position is determined.
[0063]
With respect to the seek operation, if the distance is short, the number of tracks to be jumped is calculated based on accurate address information, and a highly accurate seek operation can be realized while counting the number of tracks that cross. However, in a relatively long-distance seek operation, it is common to move the optical head at a high speed with relatively rough accuracy in order to increase the speed. In particular, in a magneto-optical disk represented by so-called MD, long-distance seek operation is performed by moving the OP by a sled motor which is one access means, and short-distance seek operation is performed by a biaxial actuator which is another access means. A method of accessing by moving the objective lens is general, and there is a great difference in seek accuracy and movable range.
[0064]
In addition, regarding the disk rotation waiting operation, there is a possibility that a waiting time of one rotation will occur at the maximum, and the expected value of the waiting time is ½ of the rotation period.
[0065]
By the way, the access method for the recording medium of the first embodiment has the following characteristics as compared with the access method for the original recording medium. First, in the recordable area, an equivalent access performance comparable to the original case can be realized. This is because complete address information is recorded in the ADIP signals of all sectors, and is not different from the original content of the ADIP signal.
[0066]
Further, in the long distance seek operation in the lead-in area, an equivalent long distance access performance comparable to the original case can be realized. This is because the upper 8 bits of the cluster number are recorded in the ADIP signal of all sectors, so that an approximate value of the relative distance can be calculated using only the upper 8 bits, and there is no need to trace a plurality of sectors. . For long-distance access, the conventional disk recording medium access method also employs a method of moving the OP by driving the sled motor, so there is no significant difference in performance such as accuracy and overhead. I can say that.
[0067]
Further, in the short distance seek in the lead-in area, accurate address information is required, and it is necessary to wait for the sector 7 or the sector 15 in order to obtain complete address information. For this reason, it takes time to obtain complete address information as compared with the original case where complete address information is recorded in all sectors. However, in the recording medium of the first embodiment, since one cluster in the lead-in area corresponds to approximately one rotation of the disk, sector 7 or sector 15 having complete address information is almost on the track circumference. It will be located at the opposite electrode. For this reason, the time required to acquire the address information only spends about ¼ rotation, which is about ½ of the expected value of the time required for the original rotation waiting operation, which is about ½ rotation. In view of the high accuracy of the next seek, it can be said that the overhead for the entire access time is small.
[0068]
Further, with respect to the rotation waiting operation in the lead-in area, a rotation waiting time equivalent to the original case can be realized. Here, it is sufficient that complete address information can be acquired immediately before the target sector. In the recording medium of the first embodiment, since sector 0 is always the target sector, complete address information is arranged at least immediately before the target sector by arranging complete address information in the ADIP signal of sector 15. Can get.
[0069]
As described above, according to the access method described above for the recording medium of the present embodiment, the additional information is arranged in place of the address information in a part of the ADIP signal. The access performance equivalent to the access to the original recording medium can be realized. Depending on the application of the system, when the recording medium of the first embodiment cannot satisfy the required specifications such as access performance, it can be modified as in other embodiments described below.
[0070]
FIG. 9 shows a second embodiment according to the present invention. In this embodiment, ADIP signals having complete address information are arranged in sector 0 and sector 8. That is, type A ADIP signals are arranged in sectors 0 and 8 and type B ADIP signals are arranged in sectors 1 to 7 and sectors 9 to 15 (F). Here, at the time of recording on the magneto-optical disk, the laser output is suddenly changed in the sector 0 which is the recording start position. Therefore, there is the highest risk that the tracking is lost and the tracing of the adjacent track is started. Therefore, when there is a lot of vibration in applications such as in-vehicle equipment, or when high reliability is required, an ADIP signal with complete address information is placed in sector 0 to quickly detect an address error. It is possible to minimize damage to adjacent tracks.
[0071]
FIG. 10 shows a third embodiment according to the present invention. This embodiment is a preferred embodiment when further reduction in the address waiting time for the short distance seek operation in the first embodiment is required. In addition to the type A ADIP signals arranged in the sectors 7 and 15 (F) in the first embodiment, they are also arranged in the sectors 3 and 11 (B). In this way, it is possible to shorten the address waiting time by increasing the rate at which complete address information is arranged in the cluster. However, as the price, additional information that can be recorded in the ADIP signal is reduced. It should be noted that the complete address information to be arranged is not limited to four places, and may be increased or decreased as long as additional information can be recorded.
[0072]
FIG. 11 shows a fourth embodiment according to the present invention. This embodiment is a preferred embodiment when the accuracy of the long distance seek operation is insufficient in the first embodiment. In the first embodiment, the additional information recorded in each ADIP signal, which is 8 bits, is reduced to 4 bits, thereby improving the accuracy of addresses recorded in ADIP signals other than sectors 7 and 15 (F). Can be improved. However, as the price, additional information that can be recorded in the ADIP signal is reduced. Of course, the number of bits of the additional information is not limited to 4 bits, and may be increased or decreased as long as the accuracy requirement of the long distance seek operation is satisfied.
[0073]
FIG. 12 shows a fifth embodiment according to the present invention. This embodiment is a preferred embodiment in the case where both the rotation waiting time of the address information of the short distance seek operation and the accuracy of the long distance seek operation are required to be improved in the first embodiment. is there. This records an address signal formed by dividing a part of the address information as a part of the additional information. For example, the figure 12 In the address information, the 16-bit cluster number is divided into 4 bits from the high-order bit, 4 bits each like cluster HH, cluster HL, cluster LH, and cluster LL. Further, the 8 bits of the additional information are divided into two parts, upper 4 bits of data H and lower 4 bits of data L. In each ADIP signal, the cluster HH is recorded in all sectors, and each of the remaining cluster HL, cluster LH, or cluster LL is recorded over three sectors together with the cluster HH. That is, of the 16 bits of the cluster number, 8 bits including the most significant 4 bits of the cluster HH are recorded, and the additional information data H and data L are divided and recorded by shifting to 8 bits free. . By arranging in this way, a complete cluster number can be obtained by tracing three or more sectors. Further, complete address information not including additional information can be arranged in one sector, for example, sector 0.
[0074]
Specifically, for example, in a certain cluster, complete address information is arranged in sector 0 without including additional information. Then, cluster HH, data 0H, data 0L, and cluster LL are arranged in 16 bits where the original cluster number of sector 1 should be placed. The cluster HH, the data 1H, the cluster LH, and the data 1L are arranged in 16 bits where the original cluster number of the next sector 2 should be placed. The cluster HH, the cluster HL, the data 2H, and the data 2L are arranged in 16 bits where the original cluster number of the subsequent sector 3 is to be entered. Thereafter, recording is performed in the same manner up to sector 15. Although the arrangement of the address information and the additional information becomes complicated by arranging the cluster number and the additional information in this way, for example, if the sector 1 to 3 sectors are traced, a complete cluster number and sufficient additional information are obtained. . Accordingly, complete address information can be obtained in a relatively short time while a sufficient amount of additional information is recorded, so that the rotation waiting time during the short distance seek operation and the accuracy during the long distance seek operation are improved. It should be noted that the cluster number and the number of divisions of the additional information and the arrangement thereof are not limited to the above-described embodiments, but can obviously be changed according to the specifications required for the system.
[0075]
In FIG. , As a reference example A sixth embodiment will be described. This embodiment is a preferred embodiment when the amount of additional information recorded is insufficient in the first embodiment. In the first embodiment, only 8 bits (1 byte) are added among 16 bits in which the original cluster numbers of sectors 0 to 6 and sectors 8 to 15 (F) are recorded in one sector of the ADIP signal. Replaced with information. However, in the sixth embodiment, all 16 bits (2 bytes) of the cluster number of sectors 0 to 14 (E) are replaced with additional information, and the sector 15 (F) does not include additional information and is a complete address. Information is being recorded. Therefore, the additional information that can be recorded in one cluster can secure 30 bytes, which is larger than the 14 bytes of the first embodiment. However, as a price, in order to obtain complete address information, it is necessary to continue tracing a maximum of one cluster, that is, 16 sectors.
[0076]
In FIG. As a reference example 7th Embodiment is shown. In the first to sixth embodiments described above, the signal format is the same as the conventional one on the premise that compatibility with the conventional (existing) ADIP signal is maintained. However, in this embodiment, the signal format of the ADIP signal is changed to increase the recording density of the ADIP signal. This makes it possible to record additional information without replacing (omitting) the address information with additional information.
[0077]
Specifically, the ADIP signal originally composed of 42 bits is increased by, for example, increasing the carrier frequency of FM modulation or changing the modulation method to PSK (Phase-Shift Keying). The bit recording density is increased to 50 bits. For this reason, although complete address information is recorded, additional information of 8 bits can be additionally recorded.
[0078]
FIG. 15 shows an eighth embodiment according to the present invention. This embodiment is a preferred embodiment when it is desired to obtain complete address information at high speed. Specifically, the first to sixth embodiments described above are changed to the above-described seventh embodiment. Based on this. As a result, the time required to acquire the address information is increased as compared with the first to sixth embodiments described above. For example, address information can be acquired without waiting for one sector time, and an error can be detected. For this reason, for example, it is possible to appropriately perform error processing and the like. For example, even if a laser spot jumps into an adjacent track, data destruction of the adjacent track can be suppressed to a range that can be recovered by error correction, and reliability can be greatly improved.
[0079]
In the case of the recording density of the ADIP signal shown in FIG. 15A, for example, in the track N, the laser spot jumps from the sector 0 of one cluster to the sector 5 of another cluster in the adjacent track N + 1 by mistake. It shows the case where it was. In this case, an address information error cannot be detected unless the worst one sector section is traced. However, as shown in FIG. 15B, for example, in the disc in which the recording density of the ADIP signal is increased to twice or more of the original by the seventh embodiment, the address information is twice in one sector section. If recording is continuously performed, an error in address information can be detected in a 0.5 sector section at worst.
[0080]
In the first to eighth embodiments described above, the additional information is recorded only in the lead-in area. However, as is apparent from the above description, the additional information is recorded in the ADIP signal in the recordable area. Of course, you may do.
[0081]
Moreover, each embodiment mentioned above is not limited to each being applied independently, and may be applied in combination. FIGS. 16 to 19 show a ninth embodiment which is a combination thereof. In this embodiment, additional information is also recorded in an ADIP signal in an area other than the lead-in area, and further, the same disk is divided into a plurality of areas, and an optimum ADIP signal format according to the use of each area. It is possible to adopt a plurality of types of ADIP signal formats.
[0082]
Incidentally, the address information described in the embodiment of the present invention is used for the purpose of accurately accessing a specific cluster while reading the address information on the disk. However, if a certain amount of error is allowed, the access position can be controlled by a mechanical mechanism regardless of the address information. In fact, in the so-called MD that has already been commercialized, when accessing the 1.5 mm wide lead-in area at the innermost periphery of the disk, the head is pushed against the detection switch provided on the inner periphery of the drive mechanism. Position detection is performed by hitting, and quick reading of disc information is realized.
[0083]
Therefore, in the ninth embodiment, the mechanically accessible lead-in area is in accordance with the first embodiment described above, and the additional information recorded in the lead-in area includes, for example, an even cluster as shown in FIG. As shown in FIG. 19A, additional information similar to that in the first embodiment is recorded. For example, in an odd-numbered cluster, the format code of another area is used as additional information as shown in FIG. Record it. Here, as shown in FIG. 16, the format code is 8-bit additional information in which, for example, a 4-bit format code and a 4-bit arrangement code are arranged. As shown in FIG. 17, the format code specifies the bit allocation of additional information in the address signal of one sector, that is, the type B format. As the type B format, those described in the above embodiments can be considered. The arrangement code is used to specify a sector in which accurate address information is recorded in one cluster, that is, an arrangement location of type A. As the placement location of type A, the one described in each of the above embodiments can be considered.
[0084]
In this way, by recording a format code based on a combination of an arrangement code and a format code as additional information, the same disk is divided into a plurality of areas, and additional information is also added to ADIP signals in areas other than the lead-in area. It is possible to record and adopt an optimum address information format according to the use of each area.
[0085]
However, in practice, the combination of the formats is not completely free. For example, in the same disk, the arrangement code is unified so that an accurate address can be found by reading a sector with a specific number, or only the first, fourth and fifth embodiments are combined, and a cluster is always used. The upper 4 bits of the number must be recorded, and the range represented by the remaining 12 bits must always belong to the same area. For example, it is necessary to consider that the area can be identified even if it enters another area by mistake.
[0086]
In the first to eighth embodiments, the same additional information is repeatedly recorded in each cluster in the lead-in area. However, information may be recorded over a plurality of clusters. This makes it possible to record more additional information.
[0087]
Further, in each of the above-described embodiments, since the minimum unit of data recording is a cluster and additional information is recorded without significantly impairing the access performance to the target cluster, a configuration capable of acquiring complete address information within one cluster As However, the cluster is only a “minimum” unit of recording, and a plurality of clusters may be recorded as one unit in an actual application (application example). In such a case, it is possible to include a cluster that does not include any address information in the address signal.
[0088]
FIG. 20 shows a tenth embodiment as an example. In this embodiment, assuming that four clusters are used as one rewriting unit, an address signal having a complete cluster address is formed only in sector F of the (4n + 3) -th cluster and added to other sectors. The information is recorded. In such a configuration, when the address information of sector F is read, it is necessary to determine whether or not it belongs to the (4n + 3) cluster.
[0089]
For example, if the rule is determined so that the lower 2 bits have a value other than 11 for the additional information placed in the sector F other than the cluster (4n + 3), the lower 2 bits of the cluster number is 11 and the sector number is F. Can be recognized as accurate address information.
[0090]
As another method, there is a method in which the sector number F to be recorded in the sector F of the cluster (4n + 3) is replaced with another value, for example, 7.
[0091]
In this case, the continuity of the sector numbers is lost, but one sector out of 64 sectors is missing, and sufficiently reliable interpolation is possible. In addition, since the last sector address that is continuously recorded is missing, and when the missing is found, the recording operation is finished, so that address monitoring during recording is not affected.
[0092]
In addition, there is an advantage that there is no need to provide restrictions on the additional information placed in the sector F of the cluster other than (4n + 3).
[0093]
As described above, according to the first to tenth embodiments, it has been possible to record the additional information in the ADIP signal in which only the address information has been recorded conventionally. Application can be realized.
[0094]
In a high-density magneto-optical disk using magnetic super-resolution, which is a main application example of an embodiment according to the present invention, a laser during recording and reproduction depends on the optical characteristics of the disk substrate and the magnetic characteristics of the recording film. It is necessary to precisely control various parameters such as the optimum power and focus bias values on the device side. By recording these various control parameters in advance on the disc according to the present invention, it is possible to stably record and / or reproduce a disc having different characteristics. FIG. 21 shows a configuration example of the disk system for this purpose, and FIG. 22 shows a flowchart showing the procedure for recording or reproduction.
[0095]
A disk system 1 shown in FIG. 21 includes a disk 10, a disk drive device 20, and a control circuit 30. The disc 10 is recorded with an ADIP signal including additional information according to the present invention. The disk drive device 20 is configured as a part that drives the disk 10 and reads information on the disk. The control circuit 30 is configured to control the disk drive device 20 and includes a ROM (Read Only Memory) 31 and a RAM (Random Access Memory) 32. The ROM 31 stores various temporary control parameters. The various control parameters are laser power, focus bias, and the like when reading information from the disk 10 by the disk drive device 20. Various control parameters unique to the disk 10 read by the disk drive device 20 using various temporary control parameters stored in the ROM 31 are stored in the RAM 32.
[0096]
Next, an operation when recording and / or reproducing with respect to the disk 10 in the disk system 1 will be described with reference to FIG. In step S <b> 21, a reproduction command for reproducing the disk 10 is transmitted to the disk drive device 20 by the control circuit 30 using the various temporary control parameters stored in the ROM 31.
[0097]
In step S22, the disk drive device 20 is driven by the reproduction command transmitted by the control circuit 30 in step S21. The disk drive device 20 reads an ADIP signal from the disk 10 using various temporary control parameters. Various control parameters specific to the disk are extracted from the ADIP signal and stored in the RAM 32 of the control circuit 30.
[0098]
In step S23, a reproduction command for reproducing the disk 10 is transmitted to the disk drive device 20 by the control circuit 30 using various control parameters unique to the disk stored in the RAM 32 in step S22. In step S24, the disk drive device 20 is driven by the reproduction command transmitted by the control circuit 30 in step S23. The disk drive device 20 performs recording and / or reproduction on the disk 10 using various control parameters specific to the disk transmitted from the control circuit 30.
[0099]
As described above, the disk system 1 according to the present invention records various control parameters as additional information on the disk recording medium. Various control parameters are read, and a disc recording medium having different characteristics can be stably recorded and / or reproduced using various parameters unique to the disc.
[0100]
A high-density magneto-optical disk, which is a main application target of the recording medium according to the present invention, is a removable (replaceable) recording medium, and is used for various devices and applications. In some cases, the same disk may be used in a mixed manner for a plurality of types of applications. Therefore, in such a situation, there is a risk that valuable data may be lost or altered by an unexpected combination of devices, a bug in a program, or a deliberate purpose, as well as protection of copyright and other rights. Therefore, as shown in FIG. The The disk drive device 2 records attribute codes in some or all sectors of the disk recording medium, while providing attribute protection means by hardware, and recording or reproduction for the sectors is performed by assigning a specific code to the attribute protection means. Running by setting. Therefore, it is possible to protect data from unexpected or unauthorized recording or reproduction.
[0101]
The disk drive device 2 includes an ADIP / FM demodulation circuit 40, an ADIP synchronization detection / address / data separation circuit 41, a cluster attribute determination circuit 42, a data write circuit 43 and a data read circuit 44.
[0102]
The ADIP / FM demodulation circuit 40 FM-demodulates the input ADIP signal and outputs it to the ADIP synchronization detection / address / data separation circuit 41. The ADIP synchronization detection / address / data separation circuit 41 detects a synchronization signal from the ADIP signal demodulated by the ADIP / FM demodulation circuit 40 and separates address information and additional information (data) to obtain address information. Are output to the outside and the additional information is output to the cluster attribute determination circuit 42.
[0103]
The cluster attribute determination circuit 42 writes data from the additional information output from the ADIP synchronization detection / address / data separation circuit 41 and the attribute code input from the outside by a data writing circuit 43 and a data reading circuit 44 described later. In addition, by limiting the read signal, data recording, reproduction, duplication, selection, and the like are controlled, and data is protected from unexpected recording or reproduction.
[0104]
The data writing circuit 43 performs predetermined signal processing on recording data input from the outside, and outputs data WRITE for writing to a disk recording medium (not shown). The data read circuit 44 receives the data READ read from the disk recording medium, performs a predetermined decoding process, and outputs it as reproduction data to the outside.
[0105]
The disk drive device 2 configured as described above writes an attribute code to a disk recording medium (not shown), and writes or records data on a disk recording medium (not shown) according to the written attribute code. Restrict reading of. As a result, the disk drive device 2 protects data from unexpected recording or reproduction on a disk recording medium (not shown).
[0106]
As described above, the recording of the additional information by the pits has become difficult due to the high density of the disk recording medium, but the recording medium according to the present invention does not depend on the pit recording, and the disk recording medium in the prior art. It is possible to realize recording by mixing additional information with the address signal while maintaining compatibility with the address recording method. As described above, the access performance is not greatly impaired by the address recording method of the recording medium according to the present invention.
[0107]
According to the recording medium address recording method of the present invention, the following effects can be obtained. First, since additional information can be newly recorded while maintaining compatibility with the conventional address signal, it is possible to realize a disk drive device capable of recording and / or reproducing on a plurality of generations of recording media, for example. For example, a disk drive device can be realized inexpensively and easily. Further, since the additional information is recorded together with the address information when the recording medium is molded, for example, there is no increase in the manufacturing cost of the recording medium due to the application of the recording medium address recording method according to the present invention. For example, it is possible to easily and inexpensively manufacture a disk recording medium.
[0108]
Further, by recording a parameter depending on the recording or reproduction characteristic specific to the recording medium as additional information, for example, compatibility of the disk recording medium and the disk drive device between different manufacturers or products is maintained. Further, since the additional information can be recorded in all the clusters on the recording medium, data (additional information) of up to several hundreds of kilobytes can be recorded at the time of forming the disc while maintaining the original data recording capacity. . Further, by recording the attribute of a part or the whole of the recording medium on the recording medium as additional information and providing the driving device with data protection means corresponding to the attribute information, for example, the reliability of data can be improved. The above is the description of the recording medium according to the present invention.
[0109]
Next, the configuration of an embodiment of a recording medium manufacturing apparatus according to the present invention will be described with reference to FIG. A recording medium manufacturing apparatus 50 according to the present invention includes an ADIP data generation circuit 51, an ADIP D An encoder 52, an optical head 53, and a motor 54 are used to record an ADIP signal on a disk 60 in the figure.
[0110]
The ADIP data generation circuit 51 generates data indicating an address in the disk 60, that is, an ADIP signal, and outputs the data to the ADIP encoder 52. Note that the ADIP data generation circuit 51 receives additional information based on the above-described embodiment of the present invention, and the ADIP signal is configured to include additional information. The ADIP encoder 52 performs bi-phase modulation with the ADIP signal supplied from the ADIP data generation circuit 51 and including the address information and additional information, and a carrier (carrier wave) having a predetermined frequency with the bi-phase signal that is the modulation signal. Is frequency-modulated, and an FM signal which is a modulated signal is output to an optical head 53 which is a recording means.
[0111]
The optical head 53 is adapted to irradiate the disk 60, which is a master disk coated with a photoresist, while meandering (wobbing) laser light in accordance with the supplied FM signal. The motor 54 is configured to rotationally drive the disk 60 at a predetermined speed. The disk 60 is irradiated with laser light from the optical head 53 while being rotated at a predetermined speed by the motor 54. In this manner, the surface of the disk 60 is developed after being exposed to a meandering shape corresponding to the address information. The developed disk 60 has a meandering (wobbled) groove, and a resulting land is formed between the grooves.
[0112]
Then, a stamper (not shown) having the surface irregularities transferred from the disk 60 is created, and the disk 10 and the like are created as a large number of replica disks using the stamper. Here, a portion generated as a result of exposure is referred to as a groove, and a portion generated without exposure, that is, a portion generated as a result of generating a groove is referred to as a land.
[0113]
In this way, when the stamper of the disk 10 is created, the disk 60 is irradiated with laser light, and the address information is formed on the side wall of the track by wobbling the laser light corresponding to the address information. Then, by using a stamper having the surface irregularities transferred from the disk 60, it is possible to manufacture the disk 10 or the like having a meandering track sidewall corresponding to the address information. The above is the description of the configuration of the recording medium manufacturing apparatus according to the present invention.
[0114]
Next, a schematic configuration of a recording / reproducing apparatus for a recording medium according to the present invention will be described with reference to FIG. In FIG. 25, an optical disk recording / reproducing apparatus 100 is an apparatus for recording data on a magneto-optical disk and / or reproducing data recorded on an optical disk. In this optical disk recording / reproducing apparatus 100, during reproduction, laser light from a laser light source in the optical head 102 is irradiated onto the optical disk 101 through the optical system, and the return light is applied to the light receiving element through the optical system in the optical head 102. Light is received and photoelectrically converted. A signal from the light receiving element in the optical head 102 is amplified by an RF (Radio Frequency) amplifier 103. Here, in the case where the optical disk 101 uses a magnetic super-resolution based on domain wall motion, that is, a so-called DWDD (Domain Wall Displacement Detection) reproduction method, the optical disk 101 is differentiated in order to take a fluctuation of a low frequency component peculiar to DWDD. The differentiated signal is quantized by the A / D converter 104 through a low-pass filter for noise reduction. The quantized signal is subjected to automatic gain control (AGC) processing by an AGC (Automatic Gain Control) / clamp circuit 105, and for example, processing for stabilizing gain fluctuations due to disk reflectance fluctuations is performed.
[0115]
The output signal from the AGC / clamp circuit 105 is sent to an equalizer / DPLL (Digital Phase Locked Loop) circuit 106, which is equalized to that which has been subjected to equalization processing and sampled with a clock synchronized with the PLL (phase locked loop). An RF signal is output. In this conventional example, AGC, equalizing, and DPLL processes are performed on the RF signal after A / D conversion, but each of AGC, equalizing, and analog PLL is performed on the analog RF signal before A / D conversion. Processing may be performed.
[0116]
The output signal from the equalizer / DPLL circuit 106 is subjected to a decoding process based on the Viterbi algorithm by the Viterbi decoder 107, and the demodulation circuit 108 performs a demodulation process as a reverse process of the modulation at the time of recording, for example, RLL (1, 7) modulation The applied and demodulated data is developed on the memory 110 via the bus line. The data stream developed on the memory 110 is subjected to error correction by an ECC (Error Correction Code) decoder / encoder 109 in units of error correction blocks, and further descrambled by an descrambler / EDC (Error Detection Code) decoder 111. EDC decoding processing is performed to obtain data DATI, and this data DATI is output to the outside together with the transfer clock SCLK from the transfer clock generation circuit 112.
[0117]
Next, in the optical disc recording / reproducing apparatus 100 of FIG. 25, at the time of recording, the data DATO input in synchronization with the transfer clock SCLK from the transfer clock generating circuit 112 is sent to the scrambler / EDC encoder 113 for scramble processing. And EDC encoding processing is performed and written in the memory 110.
[0118]
After the error correction parity is added by the ECC decoder / encoder 109, the data DATO is modulated by the modulation circuit 114 by a predetermined modulation method, for example, the RLL (1, 7) modulation method. The modulated data DATO is supplied to the magnetic head 117 via the magnetic head 115 and the laser strobe modulation clock from the modulation circuit 114 is supplied to the laser APC / driver circuit 116.
[0119]
Next, servo system signal processing in the optical disc recording / reproducing apparatus 100 of FIG. 25 will be described. The servo error signal extracted by the matrix amplifier 118 from the output signal from the optical head 102 is subjected to phase compensation and gain / target value setting for the servo signal by a digital servo signal processor (DSSP) 119.
[0120]
Servo signals from the digital servo signal processor 119 are passed through a driver (driving circuit) 120, an actuator for driving, for example, an objective lens in the optical head 102 in two axes, and a sled motor for moving the optical head 102 in the disk radial direction. 121 and the like.
[0121]
When using a land / groove recording type optical disk in which the land portion and the groove portion are recording tracks as the optical disc 101, since the polarity of the tracking error signal is reversed between the land portion and the groove portion, whichever is recorded / reproduced The system controller 125 switches the polarity depending on whether or not.
[0122]
In addition, in the focus detection in the land / groove recording type optical disc, it is known that when the astigmatism method is used, an offset is generated between the land portion and the groove portion. In order to remove the influence of this, the system controller In 125, the focus offset is set separately for the land portion and the groove portion.
[0123]
Further, an address recording system formed by wobbling the boundary between the land portion and the groove portion in the direction orthogonal to the track scanning direction by a carrier wave signal FM-modulated according to address information as the optical disc 101. When wobble is used, an address, so-called ADIP information, can be obtained by extracting the wobble signal component. The ADIP information includes additional information based on the present invention. At this time, the wobble signal component is extracted from the output signal from the matrix amplifier 118 via the ADIP bandpass filter 122, and the address information and additional information are decoded by the ADIP decoder 123. The decoded address information and additional information are transferred to the system controller 125. Note that a program that is a so-called object executed by the system controller 125 or the like is conceivable as a discriminating means for discriminating between address information and additional information. Further, the determination means may be configured by hardware.
[0124]
The output of the ADIP bandpass filter 122, the integration value of the PLL phase error in the ADIP decoder 123, and the control signal from the system controller 125 are input to a CLV (Constant Linear Velocity) processor 126, and the optical disk 101 is fed to a constant linear velocity (CLV). ) And is supplied to the spindle motor 127 for driving the disk rotation via the driver 120.
[0125]
【The invention's effect】
The recording medium according to the present invention is configured by adding additional information to address information in a recording medium in which address information is arranged in advance according to a predetermined rule and information is reproduced based on the address information. An address signal is recorded. For this reason, additional information can be added to the address signal.
[0126]
In addition, the recording medium manufacturing apparatus according to the present invention adds address information to address information on a recording medium configured so that address information is arranged in advance according to a predetermined rule and information is reproduced based on the address information. An additional address signal is recorded. Therefore, additional information can be added to the address signal of the recording medium.
[0127]
In addition, in order to solve the above-described problem, the recording medium manufacturing method according to the present invention is a recording medium in which address information is arranged in advance according to a predetermined rule, and information is reproduced based on the address information. A recording medium manufacturing method for manufacturing a medium includes a recording step of recording an address signal configured by adding additional information to address information on the recording medium. Therefore, additional information can be added to the address signal of the recording medium.
[0128]
Further, in order to solve the above-described problem, the recording / recording / reproducing apparatus according to the present invention is configured such that address information is arranged in advance according to a predetermined rule, and information is reproduced based on the address information. In a recording / reproducing apparatus for recording / reproducing a recording medium, an address signal configured by adding additional information to address information is reproduced from the recording medium. Therefore, the additional information can be reproduced from the address signal of the recording medium.
[0129]
In addition, in order to solve the above-described problem, the recording medium reproduction method according to the present invention is a recording medium in which address information is arranged in advance according to a predetermined rule and information is reproduced based on the address information. A reproducing method for reproducing a medium includes a reproducing step of reproducing an address signal configured by adding additional information to address information from a recording medium. Therefore, the additional information can be reproduced from the address signal of the recording medium.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating the configuration of clusters and sectors of a recording medium of a second format.
FIG. 2 is a diagram illustrating a configuration of original address information recorded in an ADIP signal of a recording medium having a second format.
FIG. 3 is a timing chart for explaining address recognition when accessing a recording medium of a second format.
FIG. 4 is a timing chart for explaining the continuity of sector numbers used when performing an interpolation process by determining an error in address information when a recording medium of the second format is accessed.
FIG. 5 is a diagram for explaining a configuration example of two types of ADIPs, Type A and Type B, recorded on the recording medium according to the first embodiment of the present invention.
6 is a diagram for explaining an arrangement example in a cluster of type A and type B, which are the two types of ADIP in FIG. 5; FIG.
7 is a diagram showing an example of additional information recorded on a recording medium according to type B in FIG. 5. FIG.
FIG. 8 is a flowchart showing a procedure for accessing a characteristic sector in the lead-in area of the recording medium according to the first embodiment of the present invention.
FIG. 9 is a diagram illustrating an arrangement example in a cluster of type A and type B that are two types of ADIP recorded on the recording medium according to the second embodiment of the present invention.
FIG. 10 is a diagram illustrating an arrangement example in a cluster of type A and type B, which are two types of ADIP recorded on a recording medium according to a third embodiment of the present invention.
FIG. 11 is a diagram illustrating a configuration example of type A and type B which are two types of ADIP recorded on the recording medium according to the fourth embodiment of the present invention.
12 is a diagram illustrating a configuration example of type A and type B, which are the two types of ADIP in FIG. 11, and an arrangement in the cluster. FIG.
FIG. 13 is a diagram illustrating a configuration example of two types of ADIPs, Type A and Type B, recorded on the recording medium according to the sixth embodiment of the present invention.
FIG. 14 is a diagram for explaining a configuration example of ADIP recorded on a recording medium according to a seventh embodiment of the present invention.
FIG. 15 is a conceptual diagram for comparing the timing of detecting an address error when a laser spot jumps into an adjacent track during recording / reproduction of a recording medium according to an eighth embodiment of the present invention; A) shows the case of the recording medium of the first to sixth embodiments, and (B) shows the case of the recording medium of the eighth embodiment.
FIG. 16 is a diagram for explaining the structure of a format code of a recording medium according to a ninth embodiment of the invention.
FIG. 17 is a diagram for explaining an example of a format code of the format code in FIG. 16;
18 is a diagram for explaining an example of an arrangement code of the format code in FIG. 16. FIG.
FIGS. 19A and 19B are examples of two types of additional information recorded on the recording medium according to the ninth embodiment of the present invention, FIG. 19A is an example of additional information recorded in an even-numbered cluster, and FIG. It is a figure which shows an example of the additional information recorded on an odd number cluster.
20 shows the recording medium of the tenth embodiment according to the present invention, where 4 clusters are used as a rewrite unit, sector 15 (F) of cluster (4n + 3) is replaced with sector 15 (F) of other clusters. In order to distinguish, it is a figure explaining the state which replaced the sector 15 (F) of the cluster (4n + 3) by 7. FIG.
FIG. 21 is a diagram showing a configuration example of a disk system for recording / reproducing with respect to a recording medium according to the present invention in which various control parameters are recorded as additional information.
FIG. 22 is a flowchart showing a procedure when data is reproduced by the disk system of FIG. 21 on a recording medium according to the present invention in which various control parameters are recorded as additional information.
FIG. 23 is a block diagram showing a configuration of a disk drive device for recording / reproducing data on / from a recording medium according to the present invention in which an attribute code for protecting data is recorded as additional information.
FIG. 24 is a diagram showing a configuration example of a recording medium manufacturing apparatus according to the present invention.
FIG. 25 is a diagram showing a schematic configuration of a recording / reproducing apparatus for a recording medium according to the present invention.
FIG. 26 is a diagram illustrating a configuration of a disk area of a recording medium in which tracks are configured in advance at the time of molding.
FIG. 27 is a diagram for explaining the configuration of clusters and sectors of the recording medium of the first format, and the start position and end position when recording data.
FIG. 28 is a diagram for explaining the configuration of sectors recorded by pits in the lead-in area of the recording medium of the first format.
29 is a diagram for explaining a configuration of a subcode Q of the subcoding information in FIG. 28. FIG.
FIG. 30 is a diagram illustrating the shape of a groove formed on a track of a recording medium.
31 is a diagram for explaining the configuration of an ADIP signal formed by the shape of the groove in FIG. 30;
FIG. 32 is a flowchart showing a procedure for accessing an arbitrary sector of a recording medium.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disk system, 2 Disk drive device 10 Disk, 20 Disk drive device, 30 Control circuit, 41 ADIP synchronous detection and address / data separation circuit, 42 Cluster attribute determination circuit, 43 Data write circuit, 44 Data read circuit, 50 Recording Medium manufacturing apparatus, 100 optical disk recording / reproducing apparatus

Claims (8)

In a recording medium configured so that address information is arranged in advance according to a predetermined rule and information is reproduced based on the address information.
The address information is composed of a number for each sector and a number for each cluster composed of a plurality of the sectors, and the number for each cluster is composed of an upper bit and a lower bit,
In the lead-in area of the recording medium, a first address signal composed of the address information, a second address signal in which the number of each lower-order cluster in the address information is replaced with additional information, Is recorded, and the second address signal is recorded intermittently.   The recording medium according to claim 1, wherein the first address signal and the second address signal are repeatedly recorded over all clusters in the lead-in area. The number for each cluster is divided into a first cluster number, a second cluster number, a third cluster number, and a fourth cluster number,
The first cluster number is recorded in all the sectors, and one of the second to fourth cluster numbers is recorded over three consecutive sectors together with the first cluster number. The recording medium according to claim 1.   The recording medium according to claim 1, wherein an address signal formed by dividing a part of the address information is recorded as a part of the additional information.   2. The recording medium according to claim 1, wherein the additional information is information for determining an optimum parameter for the recording medium of the access means, the recording means, and the reproducing means.   The recording medium according to claim 1, wherein the additional information is information relating to a use and / or right relating to at least a part of the recording medium.   2. The recording medium according to claim 1, wherein address information necessary for accurate address determination is recorded at least twice during the rotation period of the recording medium. In a recording medium manufacturing method for manufacturing a recording medium in which address information is arranged in advance according to a predetermined rule and information is reproduced based on the address information.
The address information is composed of a number for each sector and a number for each cluster composed of a plurality of the sectors, and the number for each cluster is composed of an upper bit and a lower bit,
In the lead-in area of the recording medium, a first address signal composed of the address information and a second address signal in which a number for each cluster corresponding to lower bits in the address information is replaced with additional information Having a recording process of recording,
In the recording step, a recording medium manufacturing method for intermittently recording the second address signal.

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