JP4107834B2 - Optical record carrier, drive device, data update method, and software version upgrade method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention generally relates to a record carrier that is recorded and / or reproduced by optical means, and a drive device for the record carrier. In particular, the present invention relates to a disc-shaped record carrier characterized by a recording configuration or format and the record carrier. The present invention relates to a drive device for recording and / or reproducing. In the present invention, for example, a read-only area (hereinafter referred to as “ROM area”) in which data is stored in advance and only reproduction of the data is allowed, and a recordable area in which data can be newly or additionally recorded ( Hereinafter, it is suitable for an optical disc mixed with “RAM area”).
[0002]
[Prior art]
Optical disks that are widely used as optical record carriers include ROM media such as CD-ROM and DVD (Digital Versatile Disc), additional recordable CD-R, various magneto-optical record carriers, and DVD-RAM. There is a change record carrier. With the development of the information industry in recent years, demands for optical record carriers are not limited to mere increase in capacity, but extend to efficient arrangement and utilization of a wide variety of information.
[0003]
In order to satisfy one of these requirements, an optical disc that can use both a ROM area and a RAM area has been proposed. For example, in a DVD, the standard determines that two disk-shaped substrates having information recorded on one surface or a disk-shaped substrate having a dummy on one side are bonded with the information-recorded surface (signal surface) facing each other. . A technique for providing a ROM area on one side of an optical disk and a RAM area on the other side is already known, for example, from Japanese Patent Laid-Open No. 228673. However, there is a demand for mixing a ROM area and a RAM area on the same disk surface.
[0004]
Therefore, the ISO standard (for example, ISO / IEC 13963) is a partial ROM type magneto-optical disk in which a read-only area in which pre-pits are formed, a data recording area formed only by address information pits and servo grooves are on the same substrate. Is stipulated. Further, there is a type such as a DVD-RAM that has a ROM area for storing management information and the like of the entire disk on the inner periphery and forms a RAM area on the outer periphery. A technique for mixing a ROM area and a RAM area on the same surface of an optical disk is also proposed by, for example, Japanese Patent Publication No. 3063641.
[0005]
[Problems to be solved by the invention]
However, although it is conceivable that the ROM area and the RAM area are constituted by one spiral track and assigned continuous addresses, the fact that the address of the RAM area changes according to the length of the ROM data includes replacement information and the like. The management area of the disc cannot be inconveniently determined, and the recording / reproducing operation becomes unstable. In addition, since the data recording area cannot be arranged efficiently unless the ROM capacity is determined in advance, it becomes difficult to efficiently record in the limited recording area in the disc. Furthermore, drastically changing the structure of the conventional drive device is not preferable because it increases the size, complexity, and cost of the drive device.
[0006]
As described above, when the ROM area and the RAM area are mixed on the same surface of the optical disk, how to arrange the ROM area and the RAM area, assign an address, and record and / or reproduce is an important problem.
[0007]
[Means for Solving the Problems]
Accordingly, it is an exemplary general purpose to provide a new and useful optical record carrier, driving device, data update method, and software version upgrade method for solving such conventional problems.
[0008]
More specifically, it is an exemplary object to provide an optical record carrier, a driving device, a data update method, and a software version upgrade method that realize stability of recording operation and various conveniences.
[0009]
In order to achieve the above object, an optical record carrier having a disk shape as one aspect of the present invention includes a spiral first region extending in the first direction from the inner peripheral side of the disk, and the disk. And a spiral-shaped second region extending in a second direction opposite to the first direction from the outer peripheral side of the disk on the same plane as the first region, A recordable area is assigned to one of the second areas, and a reproduction-only area is assigned to the other area.
[0010]
According to such an optical record carrier, since the traveling directions of the first and second areas are opposite, the first area is read from the inner circumference side to the outer circumference side without reversing the rotation direction of the optical head, and the second area is read. Can be read from the outer peripheral side of the disk to the inner peripheral side.
[0011]
Here, many drive units on the market generally rotate the disk counterclockwise as viewed from the optical head. For example, when the drive device rotates the disk counterclockwise, the first direction is set so that the optical head traces from the inner periphery to the outer periphery of the first region in the tracking state, and the anti-reflection is performed in the second region. When the optical head is rotated clockwise, the second direction is set so that the optical head traces from the outer periphery to the inner periphery in the tracking state. Alternatively, when the drive device rotates the disk clockwise, the first direction is set so that the optical head traces from the inner periphery to the outer periphery of the first region in the tracking state, and in the second region, When the optical head is rotated clockwise, the second direction may be set so that the optical head traces from the outer periphery to the inner periphery in the tracking state. That is, the read-only area may store data written in a state in which the record carrier is rotated clockwise as viewed from the optical head of the drive device that drives the record carrier.
[0012]
In addition, if the manufacturer formats the area allocated to the read-only area and the user formats the area allocated to the recordable area, the read-only area can be formed only by the manufacturer. For example, since formatting is performed (using pits), it is possible for the user to make copying impossible, thereby contributing to prevention of unauthorized copying. That is, the format for the read-only area and the format for the recordable area may be different. Also, if the software is stored in the area allocated to the read-only area and the result of using the software is stored in the area allocated to the recordable area, the user of the optical record carrier can use the software (eg, game Eliminates the need to purchase a separate memory (memory card, etc.) that records the results of software.
[0013]
The first area has an address number sequentially given from the inner circumference side of the disk, and the second area has an address number given sequentially from the outer circumference side of the disk. Thus, the first and second areas are independently addressed. As a result, the disc management area including recording data, replacement information, etc. in the recordable area independent of the reproduction-only area is determined regardless of the reproduction-only area, so that the recording / reproducing operation of the disk is stabilized.
[0014]
The recording medium may further include a non-recordable area where information cannot be recorded between the first and second areas, and the non-recordable area may be formed by intersecting the first and second areas. . The non-recordable area is a buffer area of the recording area, and is secured as an area that does not affect the recording / reproducing operation due to at least crosstalk or the like. Although the non-recordable area can be a mirror surface and the first and second areas can be formed by the head up to the front of the mirror surface, in this case, the head must be accurately positioned. Therefore, the manufacturing is facilitated by forming a non-recordable area by crossing both tracks.
[0015]
In order to avoid crosstalk due to optical interference of the light spot, the recording between the first and second areas is more than twice the track pitch of the larger one of the track pitches of the first and second areas. You may further have an impossible area. The independence of the first and second areas can be maintained by the non-recordable area. By setting the width of the non-recordable area to at least twice the larger one of the track pitches of the first and second areas (that is, the interval between adjacent tracks), the crosstalk between the two tracks can be sufficiently reduced. it can.
[0016]
Recording areas with different structures are, for example, CD-R, DVD-R, CD-RW, DVD-RW, DVD + RW, MO, CD, CD-ROM, DVD-ROM, DVD-RAM, DVD video, DVD-Audio. is there.
[0017]
An optical record carrier having a disc shape as another aspect of the present invention has a spiral shape extending in the same direction at the inner peripheral portion and the outer peripheral portion of the disc, and recording regions having different structures are assigned to the optical record carrier. And a non-recordable area where information cannot be recorded between the first and second areas and the first and second areas, and the non-recordable area intersects the first and second areas. It is formed by doing. The independence of the first and second areas can be maintained by the non-recordable area. As described above, a recordable area can be assigned to one of the first and second areas, and a read-only area can be assigned to the other area.
[0018]
An optical record carrier having a disk shape as another aspect of the present invention includes a spiral-shaped first region extending in a first direction from the inner peripheral side of the disk, and the first region of the disk. A spiral-shaped second region extending in a second direction opposite to the first direction from the outer peripheral side of the disk on the same surface, and each of the first and second regions Are assigned recording areas having different structures. Such an optical record carrier has two recording areas, a first area and a second area, and a recording area having a different structure is assigned to each area, so that variations in stored information and usage can be increased. it can. That is, the boundary between the ROM data and the RAM data may be set according to the amount of data, and the recording area distribution for performing recording with the maximum recordable capacity can be performed. Note that “a recording area having a different structure” is not only a rewritable area, a recordable recording area, and a reproduction-only area, but also a recording area that differs in recordability, and both DVD-RAM and DVD + RW are rewritable. This also includes those with different structures.
[0019]
A driving device according to another aspect of the present invention drives the optical record carrier. Such a driving device drives the optical record carrier to assist the optical driving device in performing its function.
[0020]
According to another aspect of the present invention, there is provided a data update method comprising: storing in advance basic data in an area allocated to the read-only area of the first and second areas of the optical record carrier; Storing data related to the basic data in an area allocated to the recordable area of the first and second areas. “Data related to basic data” includes, for example, results created using basic data and update information of basic data. For example, if the game software is stored in the area allocated to the read-only area and the result of using the software is stored in the area allocated to the recordable area, the user of the optical record carrier can obtain the result of the game software. Eliminates the need to purchase a separate memory for recording. Further, the basic data update information may be new data or data that invalidates a part of the basic data. Thus, the update is a concept including addition and change.
[0021]
According to still another aspect of the present invention, there is provided a version upgrade method, comprising: storing software in an area allocated to the read-only area of the first and second areas of the optical record carrier; Storing the version upgrade information of the software in an area allocated to the recordable area in the second area. According to this version upgrade method, it is possible to upgrade only a user who has basic software by using information recorded in the reproduction-only area.
[0022]
In the software version upgrade method, a step of determining whether basic software is stored in a predetermined state in an area allocated to the reproduction-only area among the first and second areas, and the software is stored. Writing the upgrade information when it is determined that the update information is present, and if no software is stored in an area of the first and second areas allocated to the reproduction-only area, the upgrade information And a step of rejecting the writing of. The predetermined state may be that the software is stored in a specific area (for example, having a specific address) in the read-only area, or the predetermined state may be that the record carrier has a predetermined rotation direction. The software may be stored in the read-only area in a state of being rotated (for example, clockwise as viewed from the optical head). As a result, this version upgrade method contributes to prevention of unauthorized copying.
[0023]
Other objects and further features of the present invention will be made clear by embodiments described below with reference to the accompanying drawings.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
With reference to FIG. 1, an optical disk 1 as an optical record carrier of this embodiment will be described. Here, FIG. 1 is a schematic plan view of the optical disc 1. The optical disc 1 has a recording area 2 having a track 2a as a spiral recording unit with a center hole 10 as a center, and a recording having a spiral track 3a extending in the opposite direction to the track 2a on the inner peripheral side thereof. There is an area 3 and a buffer area 4 between the recording areas 2 and 3.
[0025]
Consider a case where an optical head 150 of a driving device (drive) 100 (described later) that drives an optical disc is above the optical disc 1. When the optical disc 1 rotates counterclockwise as viewed from the optical head 150, the recording position in the recording area 3 (that is, the position of the optical head) moves in the outer circumferential direction, while the recording position in the recording area 2 is in the inner circumferential direction. It will be understood to move on. Thus, the optical disc 1 has a structure in which recording is performed from the inner periphery to the outer periphery in the recording area 3 and from the outer periphery to the inner periphery in the recording area 2. Such a structure has the advantage that the recording area can be completely distinguished and an independent address number can be assigned. In this embodiment, the address number is assigned from the outer periphery to the inner periphery in the recording area 2, and is assigned from the inner periphery to the outer periphery in the recording area 3.
[0026]
In the present embodiment, the track 2a extends counterclockwise when viewed from above the center hole 10 in FIG. 1, and the track 3a extends clockwise. However, in view of assigning two spiral tracks 2a and 3a extending in different directions to the recording areas 2 and 3, the track 2a is clockwise when viewed from above the central hole 10 in FIG. The track 3a may extend counterclockwise. In this case, if the drive 100 constructs a system that rotates the optical disc 1 in the clockwise direction when viewed from the optical head 150, the recording position in the recording area 3 moves in the outer peripheral direction as in the present embodiment, and the recording area 2 The recording position moves in the inner circumferential direction.
[0027]
As described above, the optical disc 1 of the present embodiment has the two tracks 2a and 3a, and assigns addresses to the recording areas 2 and 3 independently. Here, considering a case where a ROM area is allocated to the recording area 2 and a RAM area is allocated to the recording area 3, such an optical disc 1 has one spiral track with address numbers assigned as consecutive numbers. And has the following advantages over an optical disk in which a ROM area and a RAM area are mixed in such a track (hereinafter referred to as a “single spiral optical disk”).
[0028]
That is, in a single spiral optical disk, the address number of the RAM area changes when the ROM area length becomes variable, so the address of the RAM area must be calculated while calculating the length of the ROM data in order to control the recording operation. This is inconvenient because a management information area such as replacement information depending on the recording becomes undefined. If the ROM capacity is not determined in advance, the RAM area cannot be arranged efficiently and the maximum recording capacity is difficult to set.
[0029]
On the other hand, in the optical disc 1 of the present embodiment, the two recording areas 2 and 3 to which the ROM area and the RAM area are assigned are created and addressed independently. As a result, the position of the RAM area is fixed independently of the ROM area, and stable replacement management or the like can be executed to stabilize the recording operation, and the maximum recording capacity can be easily set.
[0030]
In addition, since the optical disk 1 of the present embodiment creates the two recording areas 2 and 3 independently, it is possible to apply different formats to each. For example, the ROM area can be formatted so that only the manufacturer can normally form it, and the RAM area can be structured to be formatted by the user. Such a format configuration makes it impossible for the user to easily copy information recorded in the ROM area (that is, unless equipment equivalent to that of the manufacturer is provided), so that the data stored in the ROM area cannot be copied. Improved security can be granted against unauthorized copying. In other words, the optical disc 1 can provide higher security than the single spiral optical disc.
[0031]
For example, when the optical disk 1 has a diameter of 120 mm, the inner periphery is 60 mm from the center, and the outer periphery is 120 mm, the inner periphery is a write-once or rewritable RAM area, and the outer periphery is read-only (rewrite) Impossible) type ROM area. Hereinafter, an example of manufacturing the optical disc 1 will be described.
[0032]
For example, when the inner peripheral portion is a DVD-RW, a disc-shaped polycarbonate resin (hereinafter referred to as 120 mm outer diameter, 40 mm inner diameter, 0.6 mm thickness) in which a DVD-RW format such as lead-in data, address, and track servo groove is formed The substrate is molded. Next, a recording film is formed by sequentially laminating a transparent dielectric layer, a phase change recording layer, a transparent dielectric layer, and an Al alloy-based reflective layer from a diameter of 40 mm to a diameter of 78 mm on the signal surface of the PC substrate by sputtering. Next, an ultraviolet curable (hereinafter abbreviated as UV) protective resin having a thickness of about 10 μm is applied on the reflective layer by spin coating, and cured by ultraviolet irradiation to form a UV protective film layer. The diameter of 80 mm to 120 mm is masked at the time of sputtering to form an outer peripheral portion described later.
[0033]
On the other hand, when the inner periphery is a DVD-R, it is manufactured as follows. That is, a PC board having an outer diameter of 120 mm, an inner diameter of 10 mm, and a thickness of 0.6 mm on which a DVD-R format of lead-in data, user data recording area, and lead-out data is formed. Next, a dye solution is applied to the signal surface of the PC substrate by spin coating, and a recording film is formed by sequentially laminating an Au reflective layer from a diameter of 40 mm to a diameter of 78 mm on the dried recording layer by a sputtering method. Next, a UV protective resin is applied on the reflective layer to a thickness of about 10 μm by spin coating, and cured by ultraviolet irradiation to form a UV protective film layer. The diameter of 80 mm to 120 mm is masked at the time of spin coating to form an outer peripheral portion described later.
[0034]
Further, when the inner periphery is a DVD-RAM, it is manufactured as follows. That is, a disk-shaped PC board having an outer diameter of 120 mm, an inner diameter of 10 mm, and a thickness of 0.6 mm on which a DVD-RAM format such as lead-in data, address, and track servo groove is formed is formed. Next, a recording film is formed by sequentially laminating a transparent dielectric layer, a phase change recording layer, a transparent dielectric layer, and an Al alloy-based reflective layer from a diameter of 40 mm to a diameter of 78 mm on the signal surface of the PC substrate by sputtering. Thereafter, a UV protective resin is applied to the reflective layer with a thickness of about 10 μm by spin coating, and cured by ultraviolet irradiation to form a UV protective film layer. The diameter of 80 mm to 120 mm is masked at the time of sputtering to form an outer peripheral portion described later. Of course, the inner periphery may have a CD-R or CD-RW structure.
[0035]
On the other hand, when the outer peripheral portion is a DVD-ROM, it is manufactured as follows. That is, the DVD-ROM format of lead-in data, user data area, and lead-out data is formed on the outer peripheral portion having any of the inner peripheral portions described above. Next, an Al reflective layer is laminated on the signal surface of the PC substrate from the diameter of 82 mm to 119 mm by sputtering so that the reflectance is in the range of 45% to 50%. Thereafter, a UV protective resin is applied to the reflective layer with a thickness of about 10 μm by spin coating, and cured by ultraviolet irradiation to form a UV protective film layer. Of course, the outer peripheral portion may be a CD, CD-ROM, DVD video or the like.
[0036]
A recording area having a widely different structure may be allocated to each of the inner peripheral portion and the outer peripheral portion. Recording areas with different structures include, for example, CD-R, DVD-R, CD-RW, DVD-RW, DVD + RW, MO, CD, CD-ROM, DVD-ROM, DVD-RAM, DVD video, DVD-Audio, etc. However, it is not limited to this. “Recording area of different structure” means not only a recording area having different recordability such as a rewritable area, a recordable recording area, and a reproduction-only area, but also two types of rewritable structures such as DVD-RAM and DVD + RAM. This includes the different ones.
[0037]
These arbitrary combinations can be mixed as different advantages of the recording area. For example, it is possible to perform recording using a DVD-ROM format as a ROM area and CD-R recording as a RAM area. It should be noted that the format recorded on the outer peripheral portion is different from that on the inner peripheral portion, and therefore the format is not compatible with the arrangement of the lead-in portion even in the CD system or the DVD system. This is because, if there is a ROM area in the outer periphery for various formats in which the start position is specified, it is necessary to set the start position in the outer periphery. However, in the case of recording and ROM in consideration of these points, by executing mastering, it is possible to create a shared disk by adding unique addresses while ROM and RAM areas are mixed.
[0038]
Further, when the DVD-R, DVD-RW, DVD-RAM, and DVD-ROM are combined, the format and modulation / demodulation method are common, so that there are few changes to the conventional driving device (drive). In particular, when a recordable area is provided on the inner peripheral side, a configuration capable of recording with a conventional drive can be achieved.
[0039]
A buffer area 4 as a non-recordable area is provided at the boundary between the recording areas 2 and 3, and the tracks 2a and 3a having different spiral directions are closed here. The buffer area 4 is set only in a range that does not affect the recording / reproducing operation of the addresses of the adjacent recording areas 2 and 3 due to crosstalk or the like. This range is, for example, at least twice as large as the larger track pitch of both recording areas 2 and 3.
[0040]
Since the buffer area 4 is an area that cannot be defined for use, the buffer area 4 is formed, for example, as a mirror portion on which nothing is recorded. Alternatively, the buffer region 4 may be formed by crossing the tracks 2a and 3a. This is because when the two tracks 2a and 3a intersect, the intersecting area becomes an unusable area and functions as a buffer area. Further, in order to form the buffer area 4 up to the recording areas 2 and 3a using the mirror portion, it is necessary to accurately position the optical head. However, if the buffer area 4 is formed by crossing the tracks, the head is accurate. Since positioning is not necessary, there is an advantage that manufacture is easy.
[0041]
Unlike the optical disk 1A described later, the optical disk 1 according to the present embodiment has an advantage that a design change amount of a conventional drive can be reduced because the rotation direction of the spindle motor of the drive is constant. For example, if ROM data is recorded in the recording area 2 and then the area from the inner periphery side to the radial position of the previously recorded recording area 2 is used as the RAM area, the recording can be performed by a normal driving device.
[0042]
Hereinafter, an optical disc 1A as a modification of the optical disc 1 will be described with reference to FIG. Here, FIG. 2 is a plan view of the optical disc 1A. In addition, the same reference number is attached | subjected to the member same as the member shown in FIG. 1, and duplication description is abbreviate | omitted. The optical disc 1A includes a recording area 2A having a spiral track 2b around the center hole 10, a recording area 3A having a spiral track 3b extending in the same direction as the track 2b on the inner circumference side, and a recording area 3A. A buffer region 4 is provided between the regions 2A and 3A.
[0043]
Consider a case where an optical head 150 to be described later is above the optical disk 1A. It is understood that when the optical disc 1A rotates counterclockwise when viewed from the optical head 150, the recording positions (that is, the positions of the optical heads) in the recording areas 2A and 3A are both moved in the outer peripheral direction. In order to move the recording position from the outer circumference to the inner circumference in the recording area 2A, it is necessary to reverse the spindle motor 142 described later in the recording area A and rotate it clockwise. As a result of the reversal operation by the spindle motor 142, the optical disc 1A records from the inner circumference to the outer side in the recording area 3A and from the outer circumference to the inner circumference in the recording area 2A. As with the optical disc 1, the optical disc 1A has the advantage that the recording area can be completely distinguished and an independent address number can be assigned. That is, the optical disc 1A can also be assigned the address number from the outer periphery to the inner periphery in the recording area 2A and from the inner periphery to the outer periphery in the recording area 3A by utilizing inversion by the spindle motor 142.
[0044]
In the present embodiment, the tracks 2b and 3b both extend clockwise when viewed from above the central hole 10 in FIG. However, in view of assigning two spiral tracks 2b and 3b extending in the same direction to the recording areas 2A and 3A, the tracks 2b and 3b are both counterclockwise when viewed from the top of FIG. You may extend to. In this case, when the drive 100 is viewed from the optical head 150, the spindle motor 142 is constructed such that the recording area 3 </ b> A rotates clockwise and the recording area 2 </ b> A rotates counterclockwise, as in this embodiment. The recording position in the recording area 3A moves in the outer circumferential direction, and the recording position in the recording area 2A moves in the inner circumferential direction.
[0045]
The optical disc 1A of the present embodiment thus reverses the spindle motor 142, but the recording areas 2A and 3A have spiral tracks 2a and 3a extending in the same direction from the inner periphery to the outer periphery. The arrangement on the disk surface is simpler than that of the disk 1 and the manufacture becomes easier. The spindle motor 142 performs the same recording as the optical disc 1 by reversing in the recording areas 2A and 3A.
[0046]
By reversing the spindle motor 142, it becomes easy to identify the ROM area and the RAM area so that they are not mixed in the same recording area. If the operation mode for driving the ROM area in the drive 100 is the ROM mode and the operation mode for driving the RAM area is the RAM mode, the spindle motor 142 is reversed by switching the operation state of the drive 100 that drives the disk 1A. be able to.
[0047]
When the ROM area is rarely accessed at all times, the sleep mode may be entered when the ROM area is not accessed, and the spindle motor 142 may stop rotating to save power. If access to the ROM area and access to the RAM area are separated in this way, the addition of the RAM area address number and the addition of the ROM area address number can be performed independently of each other. Compatibility with the playback system is improved. When the spindle motor 142 is reversed, the ROM area is assigned to the recording area 2A. In the recording area 2A, the address number can be assigned so that the address number increases from the outer periphery to the inner periphery. This is exactly the same as the reproduction of the ROM disk recorded from the inner peripheral side in the prior art, and the difference is that the starting position and the spindle motor are opposite in rotation direction to the conventional ROM. On the other hand, when the RAM area is assigned to the recording area 3A, in the recording area 3A, for example, a lead-in area and a data recording area are constructed from the inner periphery as in CD-R recording. This is completely the same as a normal CD-R, and can be applied to a conventional additional recording system such as multi-session. The recording at this time can be handled in exactly the same way as a normal CD-R drive device.
[0048]
The allocation of the ROM area and the RAM area described above to the recording area may be reversed. At this time, the ROM area has a normal prescribed format configuration, and the RAM area is recorded from the outer periphery to the inner periphery. . Since the boundary between the ROM area and the RAM area is determined by the amount of data recorded in the ROM, the range of the RAM area is determined by the data amount of the ROM area.
[0049]
Hereinafter, the driving apparatus 100 of the present invention capable of driving the optical disc 1 will be described with reference to FIG. Here, FIG. 3 is a block diagram of the driving apparatus 100. The drive device 100 includes a CPU 110, a memory 120, a recording / reproduction signal processing unit 130, a spindle motor 142, a scale 144, an optical head 150, a spindle control circuit 160, and an interface unit 170, and the optical disk 1 can be attached and detached. Can be stored. In the following description, unless otherwise specified, the optical disc 1 summarizes the optical disc 1A.
[0050]
The CPU 110 can control the operation of each unit and can communicate with the host device 200 described later. The memory 120 is, for example, a nonvolatile memory such as a ROM that stores system operation programs and data, and a volatile memory such as a RAM that temporarily stores information read from the optical disk 1 by the optical head 150 and a necessary control program. Including memory.
[0051]
The recording / reproduction signal processing unit 130 processes a signal recorded by the optical head 150 on the optical disc 1 and a signal reproduced from the optical disc 1. More specifically, signal processing of a reproduction signal obtained from the optical head 150, modulation of a recording signal, and setting of recording conditions by the optical head 150 are performed. The spindle motor 142 rotates the disk 1 clockwise or counterclockwise when viewed from the optical head 150.
[0052]
The scale 144 detects the displacement amount and position of the optical head 150. The scale 144 is formed as a magnetic scale unit, for example. The magnetic scale unit is attached to, for example, a plurality of magnets provided in the longitudinal direction at equal intervals on a plate-like substrate fixed in the driving device 100, and a carriage that moves the optical head 150 on the optical disc 1, and is attached to the magnet. And a magnetic sensor such as a Hall element facing each other. The magnet is aligned with N, S, N, S, etc. as viewed from the magnetic sensor, and the magnetic sensor detects the change in the magnetic field. When the optical head 150 moves, the magnetic sensor and the substrate are relatively displaced, so that an electric signal that changes in response to a change in the magnetic field is output from the magnetic sensor at a frequency proportional to the relative speed between the optical head 150 and the substrate. The Therefore, the relative displacement between the optical head 150 and the substrate can be detected by counting the number of pulses included in the electrical signal, and the number of pulses included in the electrical signal detected per unit time can be detected. The relative displacement speed between the head 150 and the substrate can be detected.
[0053]
The optical head 150 irradiates the optical disc 1 with laser light for recording and / or reproducing the optical disc 1. As described above, the driving apparatus 100 according to the present embodiment has one optical head 150 for the two recording areas 2 and 3. The spindle control circuit 160 controls the rotation direction and speed of the spindle motor 140. The CPU 110 performs recording / reproduction control and drive control based on the position information of the optical head 150 from the scale 144 and the rotation information from the spindle control circuit 160. The interface unit 170 connects the drive 100 to an external device 200 such as a personal computer (hereinafter referred to as “PC”) which is a host device. Since any component known in the art can be applied to each component, the detailed structure of each part is omitted here.
[0054]
Hereinafter, a general operation of the driving apparatus 100 will be described. In this embodiment, the driving device 100 is a dedicated driving device that drives the optical disc 1 or 1A. However, in another embodiment, the driving device 100 can drive the optical discs 1 and 1A and other optical discs. When the driving device 100 drives a plurality of types of optical discs, the driving device 100 first identifies the optical disc loaded. As a result, the CPU 110 identifies the optical disc and grasps management information such as the rotation method and replacement information. The identification information is written, for example, in a management area provided on the outermost or innermost track of the optical disc. Conditions for reading out the management area (access position, rotation method (rotation speed and rotation direction), laser beam power, etc.) are set in advance in the memory 120 as a part of firmware or the like.
[0055]
Hereinafter, a case where the driving apparatus 100 drives the optical disc 1 will be described. The CPU 110 attempts to acquire management information from the optical disc 1 in response to a recording / playback command from a higher-level device (PC in this embodiment) 200 connected to the drive device 100. The above-mentioned conditions for accessing the management area of the optical disc 1 are stored in advance in the memory 120 as a part of firmware or the like. The CPU 110 determines whether the firmware stored in the memory 120 has acquired management information from a preset position on the optical disc 1. If the CPU 110 determines that the predetermined management information is not obtained from a preset position, the CPU 110 determines that the mounted optical disk 1 is not a disk supported by the driving device 100 and cannot be activated, and stops driving. At the same time, the CPU 110 transmits a message to that effect to the higher-level device 200 and displays it on the display.
[0056]
On the other hand, when the CPU 110 obtains the management information from the optical disc 1, the CPU 110 grasps the structure of the optical disc 1 (for example, the arrangement of the ROM area and the RAM area). When the ROM area and the RAM area are arranged on the optical disc 1, when executing a recording / reproduction command from the host apparatus 200, the CPU 110 performs reproduction only on the optical head 150 when the optical head 150 is on the ROM area. If the data is on the RAM area, the optical head 150 is allowed to record / reproduce.
[0057]
More specifically, a signal reproduced from the ROM area and the RAM area by the optical head 150 is demodulated by the recording / reproduction signal processing unit 130, and the CPU 110 transmits the signal to the host device 200 via the interface unit 170. The host device 200 outputs the information via an output device such as a display or a speaker. The information received by the CPU 110 from the host device 200 via the interface unit 170 is written into the RAM area by the optical head 150 after the recording / reproduction signal processing unit 130 modulates the signal.
[0058]
Note that the CPU 110 can determine the rotation direction of the optical disc 1 by performing an initial operation. For example, when the track spiral direction can be specified by the output from the scale 144, the CPU 110 positions the optical head 100 at a specific position on the optical disc 1 in the initial operation. As a result, since the CPU 110 can specify the direction of the spiral, the CPU 110 determines the rotation direction of the spindle motor 142.
[0059]
The CPU 110 can also detect the spiral direction using tracking. Since the tracks 2a and 3a are formed in a spiral shape, the progress method of the optical head 150 can be known from the scale information when proceeding in the tracking state. The CPU 110 has a normal traveling direction (that is, according to the current rotation direction of the spindle motor 142, the recording position in the recording area 3 moves from the inner periphery to the outer periphery, and the recording position in the recording area 2 moves from the outer periphery. In the case of moving to the inner circumference), the rotation direction of the spindle motor 142 is maintained. On the other hand, when determining that the traveling direction of the optical head 150 is not normal, the CPU 110 instructs the spindle control circuit 160 to reverse the rotation direction of the spindle motor 142. The CPU 110 determines whether the format is normal from the reproduction signal from the recording / reproduction signal processing unit 130. If an appropriate signal is obtained from the reproduction signal, the CPU 110 determines that the optical disc 1 is driven in an appropriate rotation direction.
[0060]
As described above, in the case of the optical disc 1, the rotation direction of the spindle motor 142 does not change, so the CPU 110 maintains the rotation direction of the spindle motor 142 in other recording areas.
[0061]
Note that the driving device 100 of the present embodiment does not consciously detect the buffer area 4 when using the optical disc 1 or perform rotation control based on the buffer area 4. In the optical disc 1, since the spiral directions of the tracks 2a and 3a are reversed, the optical head 150 cannot move from the buffer area 4 to the area beyond the trace by the tracking operation. It serves as a guard band.
[0062]
When the optical disc 1 </ b> A is used, the CPU 110 controls the rotation direction of the spindle motor 140 via the spindle control circuit 160 according to the position of the optical head 160. Recording / reproducing operations other than the rotation control for the optical disc 1A are the same as those of the optical disc 1. As a method of determining the rotation direction of the optical disc 1A, the CPU 110 can use the management information, initial operation, and tracking described above. Here, as described above, since the rotation direction of the spindle motor 142 is reversed with respect to the recording areas 2A and 3A, the CPU 110 may perform the above-described initial operation and tracking in both the recording areas 2A and 3A.
[0063]
The CPU 110 determines the recording areas 2A and 3A based on the detection of the address. However, the detection of the buffer area 4 can be detected by detecting the mirror part or the occurrence of a continuous address error (because recording from the reverse direction cannot be read). To detect.
[0064]
The optical disk 1 of the present invention can be used in various ways. Hereinafter, usage examples of the optical disc 1 will be described.
[0065]
For example, in the game software, the game software can be recorded in the ROM area, and the game result by the user can be recorded in the RAM area. Game software stored and sold on a conventional CD-ROM or the like cannot record game results, and the user has to inconveniencely purchase a memory card dedicated to the game machine. In fact, the disk has a sufficient recording area for storing game results. If the optical disc 1 or 1A of the present invention is used, the user need not purchase a memory card, which is convenient both economically and in resources.
[0066]
Some software is upgraded. If this disc 1 or 1A is used, it is possible to upgrade the version only for authorized users. Such usage will be described with reference to FIG. Here, FIG. 4 is a flowchart showing a version upgrade method as an example of use of the optical disc 1 or 1A (hereinafter collectively referred to as the optical disc 1). As a premise, a ROM area and a RAM area are formed on the optical disc 1. Here, the ROM area is assigned to the recording area 2 and the RAM area is assigned to the recording area 3.
[0067]
First, certain software (for example, game software) is recorded in a non-rewritable recording area 2 as a ROM area. The version of the basic software may be the first version or a version other than that. In the present embodiment, the basic software refers to software recorded in the ROM area so as to be rewritable.
[0068]
In this embodiment, it is assumed that the upgrade information is distributed as compressed data via the Internet, and a key and a password are required to decompress the compressed data.
[0069]
When upgrading the basic software (step 1004), the host device 200 downloads the upgrade information via the Internet. Next, the host device 200 requests the CPU 110 of the driving device 100 for a key or password.
[0070]
In response to this, the CPU 110 determines whether or not the user who needs to upgrade the version possesses regular basic software (step 1006). For example, the CPU 110 determines whether basic software or identification information thereof is stored in a predetermined rotation direction in a specific area of the ROM area.
[0071]
Therefore, the CPU 110 stores the basic software in the RAM area, does not store the basic software identifier in a specific area of the ROM area, or stores the basic software in a direction opposite to the rotation direction that should be originally written in the ROM area. If it has been written, the upgrade is rejected and a notification to that effect is sent to the host device 200 (step 1008). The host device 200 displays that fact on a display (not shown). In the present embodiment, the rejection by the CPU 110 is that a key or password for decompressing the compressed data of the upgrade information is not given or cannot be given to the host device 200. As a result, the user cannot obtain upgrade information.
[0072]
On the other hand, if the CPU 110 determines that the user who needs the upgrade information possesses regular basic software, the CPU 110 gives the key or password to the host device 200. Next, the host device 200 sends the decompressed upgrade information to the drive device 100 and instructs it to be stored in the RAM area, and the CPU 110 stores the upgrade information in the recording area 3 in response to this (in FIG. Step 1010). As a result, only authorized users who have purchased basic data can receive the upgrade service. As described above, the optical disc 1 or 1A has an advantage that data related to data stored in the ROM area (that is, additional data, update data, auxiliary data, etc.) can be stored in the RAM area.
[0073]
As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change can be performed unless it deviates from the summary. In particular, as described above, the present invention is not limited to DVD-type discs, and can be applied to all types of optical discs.
[0074]
【The invention's effect】
According to the optical record carrier of the present invention, each of the first and second areas is assigned with a recording area having a different structure (repeatable recording type, write-once type, read-only type, etc.), and thus stored information The usage variation can be increased, the diversified information can be recorded according to diversifying needs (copy prevention, version upgrade, etc.), and stable recording operation can be ensured at the same time. .
[Brief description of the drawings]
FIG. 1 is a plan view of an optical disc according to a first embodiment of the present invention.
FIG. 2 is a plan view of an optical disc according to a second embodiment of the present invention.
FIG. 3 is a block diagram of a drive device that drives the optical disc shown in FIG. 1 or FIG. 2;
4 is a flowchart showing an example of use of the optical disc shown in FIG. 1 or FIG.
[Explanation of symbols]
1, 1A optical disc
2, 2A Outer recording area
2a, 2b Outer recording track
3, 3A Inner side recording area
3a, 3b Inner circumference recording track
4 Buffer area
100 Drive unit

Claims (13)

A first region in which the optical head moves from the inner peripheral side to the outer peripheral side, the optical head moves from the outer peripheral side to the inner peripheral side, is formed on the same plane as the first region, and A second region disposed outside the one region,
The first region has a spiral shape extending in a first direction from the inner peripheral side, and the second region is a first direction opposite to the first direction when viewed from the inner peripheral side. Having a spiral shape extending in two directions,
For the first region, sequentially assign an address number from the inner periphery side, to the second region, sequentially assign an address number from the outer periphery side ,
A recordable area is allocated to one of the first and second areas, and a read-only area is allocated to the other area . A first region in which the optical head moves from the inner peripheral side to the outer peripheral side, the optical head moves from the outer peripheral side to the inner peripheral side, is formed on the same plane as the first region, and A second region disposed outside the first region, and the first and second regions have a spiral shape extending in the same direction when viewed from the inner peripheral side,
For the first region, sequentially assign an address number from the inner periphery side, to the second region, sequentially assign an address number from the outer periphery side,
A recordable area is allocated to one of the first and second areas, and a read-only area is allocated to the other area . It further has a non-recordable area where information cannot be recorded between the first and second areas, and the non-recordable area is formed by crossing the first and second areas. The optical disk according to claim 1 or 2, characterized in that: 2. The non-recordable area between the first area and the second area is more than twice as large as the larger one of the track pitches of the first and second areas. Or the optical disk of 2 . Before SL playback only area, according to claim 1 or 2, characterized in that said disk to store data written by the rotated state in the clockwise direction as viewed from the optical head driving apparatus for driving the disc optical disk according to. Said first and second realm is, CD-R, DVD-R , CD-RW, DVD-RW, DVD + RW, MO, CD, CD-ROM, DVD-ROM, DVD-RAM, DVD Video, DVD- Audio optical disk according to claim 1 or 2, characterized in that it comprises either. A first region in which the optical head moves from the inner peripheral side to the outer peripheral side, the optical head moves from the outer peripheral side to the inner peripheral side, is formed on the same plane as the first region, and has a second region arranged outside the first region, and a unrecordable area that can not record information during the first and second regions, said first and second regions Has a spiral shape, a recordable area is assigned to one of the first and second areas, a read-only area is assigned to the other area, and the inner circumference is assigned to the first area. An address number is sequentially assigned from the side, an address number is sequentially assigned to the second area from the outer peripheral side, and the unrecordable area is formed by intersecting the first and second areas. An optical head for performing recording and / or reproduction on an optical disc; A detection mechanism for detecting the position of the optical head, a rotation mechanism for rotating the optical disk, position information of the optical head detected by the detection mechanism, and a spiral of the track corresponding to the position of the optical head are extended. And a control unit that determines a rotation direction of the optical disc by the rotation mechanism based on existing direction information. 8. The driving apparatus according to claim 7 , wherein the direction information is acquired by a tracking operation of the optical head. 8. The driving apparatus according to claim 7 , wherein the optical head cannot trace beyond the unrecordable area in tracking. A first region in which the optical head moves from the inner peripheral side to the outer peripheral side, the optical head moves from the outer peripheral side to the inner peripheral side, is formed on the same plane as the first region, and A second area disposed outside the first area, and a non-recordable area where information cannot be recorded between the first and second areas, wherein the first and second areas are The non-recordable area has a spiral shape and is formed by intersecting the first and second areas. The first area is assigned an address number sequentially from the inner periphery side, and the first area An address number is sequentially assigned to the area 2 from the outer peripheral side, one of the first and second areas is assigned a recordable area, and the other is assigned a read-only area. one of the first and second regions of the optical disc to Pre-store basic data in an area allocated to the read / write area, and store data related to the basic data in an area allocated to the recordable area of the first and second areas. And a data updating method. A first region in which the optical head moves from the inner peripheral side to the outer peripheral side, the optical head moves from the outer peripheral side to the inner peripheral side, is formed on the same plane as the first region, and A second area disposed outside the first area, and a non-recordable area where information cannot be recorded between the first and second areas, wherein the first and second areas are The non-recordable area has a spiral shape and is formed by intersecting the first and second areas. The first area is assigned an address number sequentially from the inner periphery side, and the first area An address number is sequentially assigned to the area 2 from the outer peripheral side, one of the first and second areas is assigned a recordable area, and the other is assigned a read-only area. one of the first and second regions of the optical disc to Storing the software in serial assigned to the reproduction-only area region,
Determining whether the software is stored in a predetermined state in an area allocated to the reproduction-only area among the first and second areas;
When it is determined that the software is stored in the reproduction-only area in the predetermined state, the software upgrade information that is assigned to the recordable area of the first and second areas A step of storing
And a step of rejecting writing of the upgrade information when it is determined that the software is not stored in the predetermined state in the reproduction-only area. Wherein the predetermined condition, the software upgrade method according to claim 11, wherein said is that the software in a specific area in the reproduction-only area is stored. The predetermined state is a state where the optical disk is rotated, the software upgrade method according to claim 11, wherein the software in the reproduction only area is that which is stored.

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