JPH11250522A - Optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable holdover of a part of data, small scale modification, improvement of a program and further protection of a range of a right even by a single recording medium. SOLUTION: Recorded information is reproduced from an aluminum reflection layer 102 of an optical disk mounted in a device and the program included in the recorded information is executed. However, when the data required to be held over to the start, etc., next time and afterward is generated, the data which is held over is reproduced by preliminarily recording the data in a magnetic recording layer 105 via a magnetic head 107 and driving the magnetic head 107 in a reading mode at the next start. Namely, the data is held over to a temporally and postionally different state even by the singly recording medium by using a specified driving device by a user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hybrid optical disk having a rewritable area and a non-rewritable area.

[0002]

2. Description of the Related Art A CD-R, which can be said to be a representative disc-shaped information recording medium for reading information by irradiating a laser beam onto a signal recording surface.
The OM is a read-only memory that cannot be re-recorded, but has the advantage that it can be manufactured at a relatively large capacity and at low cost. Further, since it has a strong error correction capability and is easy to handle, it is suitable for use in distributing or selling programs such as game software. Further, this type of CD-ROM is difficult to duplicate unless specific equipment is prepared, and the system side is a C-ROM that is a playback-only machine.
By validating only the data from the D-ROM playback device, there is a feature that the execution of the program with the duplicated recorded information is easily prevented, and the recorded information is easily protected from the duplication means. On the other hand, since a CD medium for music is used as a base in the standard, it is easy to add a CD-DA sound to a program, and a music reproduction function not provided in other information recording devices is described above. It also helps protect recorded information from duplication by duplication means.

[0003] The structure of a conventional CD-ROM medium,
A drive device used for driving a ROM medium will be described with reference to FIG. As shown in FIG. 4, a conventional CD-ROM medium has a transparent structure 401 and an aluminum reflective layer 402.
, The protective layer 403 and the label layer 404 are stacked in four layers. The drive device includes an optical pickup 4 that optically reads data recorded on the aluminum reflective layer 402.
06 while performing tracking control and focusing control on the optical pickup 406.
Scanning the ROM medium from the inner side to the outer side to read and reproduce recorded information;

[0004]

However, the conventional CD-ROM medium is a non-rewritable medium. Therefore, for example, when the present invention is applied to a recording medium of a game program or the like in which some data may be carried over at the next startup. In addition, another information recording device capable of reading and writing data is indispensable, and reproduction of a CD-ROM medium and reproduction of partially carried over data by another information recording device are inseparable, which complicates data management. There was such a problem. In addition, since the conventional CD-ROM medium is a non-rewritable medium, it is difficult to correct or improve when a problem is found after the program is distributed, and some of the information recording apparatus on the system, for example, a hard disk or the like. The above modifications and improvements can be made by placing a program, but such an approach not only requires other information recording devices in all the systems to be used, but also
When a modification or improvement occurs, the program on all systems must be modified or improved, and there is a problem that a considerable work load must be prepared. After installation, like the server / OS,
-A system that eliminates the need for ROM media is a single C
The D-ROM medium can be installed in a plurality of environments, and there is a fundamental problem that an unspecified number of uses impair the profit of the install medium distributor.

[0005] The present invention has solved the above problems,
Despite being a single recording medium, it is possible to carry over some data, make minor modifications or improvements to programs, and protect the scope of rights.

[0006]

According to the present invention, there is provided a transparent disk having signal pits on an upper surface thereof,
A light reflecting layer covering the upper surface of the transparent disk, a protective layer covering the light reflecting layer, a label layer located on the uppermost layer, and a magnetic layer readable and writable between the label layer and the protective layer And a suitable magnetic recording layer.

Further, according to the present invention, a disc-shaped recording medium is divided into a plurality of areas by designating a disk radius, a specific area of the plurality of areas is constituted by a read-only CD-ROM medium, and the remaining area is formed. Is composed of a rewritable CD-RW medium.

Further, according to the present invention, a rewritable CD-RW medium is provided with a non-rewritable information recording area in which rewriting and erasing are prohibited by a special format, and the rest is made a rewritable information recording area. It is characterized by the following.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing a first embodiment of the optical disk of the present invention.

The optical disk shown in FIG. 1 has a disk-shaped transparent structure 101 having signal pits formed on the upper surface side, an aluminum reflective layer 102 formed by vapor deposition on the signal pits of the transparent structure, and an aluminum Protective layer 103 covering reflective layer
And a label layer 104 located on the uppermost layer.
Although it is based on a ROM medium, the magnetic recording layer 1 is located between the protective layer 103 and the label layer 104 of the CD-ROM medium.
There is a feature in the point where 05 is inserted. This magnetic recording layer 105
Is a magnetic recording material uniformly coated on the upper surface of the protective layer, and information can be read and written by a magnetic reading means such as the magnetic head 107.

[0011] The drive device for the optical disk is
An optical pickup 106 for reproducing data recorded on the aluminum reflective layer 102; and a magnetic recording layer 105 from the label side.
And a magnetic head 107 for reading and writing information. The information read by the optical pickup 106 or the magnetic head 107 is supplied to information processing means such as a game device main body (not shown). That is, the drive device includes an optical information reproducer for reproducing information from the laser beam reflected by the aluminum reflective layer 102, a magnetic information recording / reproducer for reading / writing information from / on the magnetic recording layer 105, or an optical disk for a disk drive mechanism. And a system controller for executing a program recorded on an information recording medium.

The drive device reproduces recorded information from the aluminum reflective layer 102 of the optical disk mounted in the device, and executes a program included in the recorded information. However, when data that needs to be carried over at the time of the next start-up or the like occurs, this data is recorded on the magnetic recording layer 105 via the magnetic head 107, and the magnetic head 107 is driven in the read mode at the next start-up. , Can carry over the carryover data. That is, by using the designated drive device, the user can overtake data in different situations in terms of time and place even with a single recording medium. In addition, since the basic program is reproduced from the same area as a conventional CD-ROM medium that is non-rewritable and used for reproduction only, it is necessary to prevent illegal use such as duplication and use CD-DA audio as before. Can be.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 2 is a sectional view showing a second embodiment of the optical disc of the present invention. The optical disk shown in FIG.
The hybrid structure has a non-rerecordable aluminum reflection region and a rerecordable phase change reflection region between the transparent structure portion 201 and the label layer 204. That is, the plane of the disk is divided into two areas on the outer circumference side and the inner circumference side according to the distance from the center of the disk. Here, the outer circumference side is an aluminum reflection area 202 having the same structure as a normal CD-ROM medium which is a read-only memory. And the inner side is CD-RW
This is a phase change reflection area 205 which can record and erase data by phase change having the same structure as the medium. 203
Is a protective layer. For the reason of the manufacturing process, a gap region 208 is provided at the boundary between the aluminum reflection region 202 and the phase change reflection region 205.
Reference numeral 8 serves as a boundary for dividing the two types of regions. For this reason, in the second embodiment, by treating the aluminum reflection area 202 as session 1 and treating the phase change reflection area 205 as session 2, unnecessary access can be restricted and occurrence of a failure can be suppressed.

However, in order to prevent the gap area 208 from hindering traffic between sessions, a multi-session method, which is one of the CD-R write-once methods, which is a write-once optical disk, is also employed by software. Thus, the target reproduction or recording can be performed by freely skipping the gap area 208 separating the sessions 1 and 2 by multi-session. The optical pickup 206 is compatible with a CD-RW medium,
It is possible to reproduce information recorded in the aluminum reflective area 202 of the D-ROM medium and read / write information from / to the phase change reflective area 205.

The user operates the CD-ROM of the second embodiment.
The recorded information is reproduced from the aluminum reflective area 202 of the medium to execute the program. When data that needs to be carried over occurs at the time of the next start or the like, the phase change reflection area 20
5 can be recorded. Therefore, the user carries over data to different situations in time or place with a single medium by using the drive device corresponding to the CD-ROM medium and the CD-RW medium according to the second embodiment of the present invention. It becomes possible. Also, a conventional CD-ROM which is non-rewritable and read only,
Since reproduction is performed from the same area as the medium, it is possible to prevent illegal use such as duplication and use CD-DA audio as before.

The optical disc shown in each of the above embodiments partially has a CD-ROM medium.
The entire optical disc may be constituted only by a rewritable CD-RW medium. However, in that case, C
The D-RW medium is provided with a non-rewritable information recording area in which rewriting and erasing are prohibited in a dedicated format, and the rest is a re-recordable information recording area, and writing / reading is performed in a non-rewritable information recording area dedicated format. Read / write is performed using a dedicated CD-RW drive that can limit the That is, the program on the CD-RW medium of the third embodiment is written in a special format, the drive device detects the special format, prohibits erasing or writing, and uses a normal CD-RW without the special format. Data can not be read by the ROM drive.

FIG. 3 is a flowchart for explaining the area check method for the optical disk. Here, it is assumed that the data area has a normal format and enables erasing and writing, and editing and reading by a normal drive. First, in step (301) of FIG. 3, area information is acquired and the format is checked. In the format check, it is determined whether or not the format is a dedicated format.
A write prohibition flag is set for the area, and the process proceeds to a determination step (305). However, if it is determined that the format is not a dedicated format, the process proceeds to step (305) without performing flag control for the area. Judgment step (3
At 05), it is determined whether or not the format check of all areas has been completed. If not all areas have been completed, movement to the next area is performed at step (306).
Return to the first step (301). In this way, until the format check of all areas is completed in the judgment step (305), the above steps (301) to (306)
Is repeatedly executed.

The user can reproduce the recorded information from the dedicated format area of the CD-RW medium and execute the program, and when data that needs to be carried over at the time of the next start-up or the like is generated, the user can use the program. It can be recorded in the format area. Therefore, by using the CD-RW medium and the dedicated CD-RW drive device, it is possible to carry over data to different situations in time and place with a single medium. In addition, since the basic program is reproduced from a non-rewritable reproduction-only format area, unauthorized use such as duplication can be prevented and CD-DA audio can be used as before.

[0019]

As described above, the optical disk of the present invention has a structure in which the protective layer covering the light reflecting layer covering the upper surface of the transparent disk having the signal pits on the upper surface and the label layer located on the uppermost layer are disposed between the protective layer. Since a magnetic recording layer that can be read and written magnetically is interposed, a read-only memory CD-
A ROM and a magnetic recording medium that can be read and written at any time can be stacked in the thickness direction of the disk, and a single medium can wait for data in different situations in time or place. Programs are reproduced from the same area as conventional non-rewritable read-only CD-ROM media to prevent unauthorized use such as duplication and CD-DA
There is an excellent effect that the voice can be used as before.

Further, according to the present invention, a disc-shaped recording medium is divided into a plurality of areas by designating a radius of a disk, a specific area of the plurality of areas is constituted by a read-only CD-ROM medium, and the remaining area is constituted by a read-only CD-ROM medium. Is composed of a rewritable CD-RW medium, so that, for example, the disk plane is divided into two regions on the outer peripheral side and the inner peripheral side according to the distance from the center of the disk, and the outer peripheral side is a normal CD-RW which is a read-only memory An aluminum reflective area having the same structure as the ROM medium and a phase change reflective area having the same structure as the readable / writable CD-RW medium on the inner peripheral side, and a gap area at a boundary between the aluminum reflective area and the phase change reflective area. With this arrangement, for example, when the aluminum reflection area is set to session 1 and the phase change reflection area is set to session 2, unnecessary access to the gap area is restricted, so that occurrence of a failure is suppressed. In addition, a multi-session method, which is one of the CD-R write-once optical discs, should be adopted by software so that the gap area does not hinder traffic between sessions. Thus, an excellent effect is obtained such that the target reproduction or recording can be performed by freely skipping the gap area separating the sessions 1 and 2 by multi-session.

The present invention also relates to a rewritable CD-ROM.
The RW medium is provided with a non-rewritable information recording area in which rewriting and erasing are prohibited by a special format, and the rest is made a rewritable information recording area. Therefore, erasing is performed based on a rewritable CD-RW medium. -A non-writable program area and a writable data area are provided so that data can be carried without using another information recording device. In addition, by rewriting a part of the program copied to the data area, Modification or improvement is possible, so that it is not necessary to modify or improve the program every time the system is used. In addition, the time used as the installation medium, the target system, the number of installations, etc. are stored in a writable data area. Restrict installation on unspecified number of system devices Succoth are possible, thereby an excellent effect such as can be prevented distributor benefits lost by illegal copy.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of an optical disc of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the optical disc of the present invention.

FIG. 3 is a flowchart illustrating an area check method according to a third embodiment of the optical disc of the present invention.

FIG. 4 is a sectional view showing an example of a conventional optical disk.

[Explanation of symbols]

 101, 201, 401 Transparent structure part 102, 402 Aluminum reflective layer 103, 203, 403 Protective layer 104, 204, 404 Label layer 105 Magnetic recording layer 106, 206, 406 Optical pickup 107 Magnetic head 202 Aluminum reflective area 205 Phase change recording Region 208 gap region

Claims (3)

[Claims] 1. A transparent disk having signal pits on its upper surface,
A light reflecting layer covering the upper surface of the transparent disk, a protective layer covering the light reflecting layer, a label layer located on the uppermost layer, and a magnetic layer readable and writable between the label layer and the protective layer An optical disc, comprising: a magnetic recording layer. 2. A disk-shaped recording medium is divided into a plurality of areas by designating a radius of a disk, a specific area of the plurality of areas is constituted by a read-only CD-ROM medium, and the remaining area is rewritable. An optical disc comprising a CD-RW medium. 3. A rewritable CD-RW medium, wherein a non-rewritable information recording area in which rewriting and erasing are prohibited by a dedicated format is provided, and the rest is a rewritable information recording area. optical disk.