JP2007109339A - Optical recording medium and recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical recording medium which enables a person having a personal computer and a group of persons having personal computers to safely store and record information and secret data which are held by them, respectively. <P>SOLUTION: In the optical disk 1 used to record or reproduce information in a recording-and-reproducing device, information on an environment, in which an optical disk 1 is used, is recorded as initial information to a second session 22 in a recordable area before the disk 1 is used for the recording or reproduction of information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical recording medium for recording or reproducing information or data, and a recording / reproducing apparatus for recording or reproducing the optical recording medium.

Due to the recent increase in the amount of information, CD-R / RW drives capable of recording and reproducing large amounts of data at high density and high speed in the infrastructure of personal computers have become standard equipment and have become widespread. Accompanying this, information backup, exchange, and browsing have generally been performed conveniently on CD and DVD format optical disks.
A wide variety of methods for recording and reproducing information on optical recording media such as CD-R, CD-RW, DVD ± R, DVD ± RW, and DVD-RAM for storing information or for personal use The data and documents stored in the hard disk can be easily backed up by a recording / reproducing device (drive device) for an optical recording medium used in a personal computer.
Therefore, even when the information capacity in the hard disk exceeds and it is necessary to erase the information, the same information can be easily reproduced by reproducing the optical recording medium backed up by the recording / reproducing apparatus. Further, since all information in the hard disk can be selected and only important information required by the individual can be extracted, edited and stored, information can be used and managed efficiently.
Prior Document 1 discloses a method for copying an optical recording medium that can prevent unauthorized copying and protect the right of the information copyright holder, and that allows the user to perform regular copying such as backup, and the copying thereof. Techniques relating to optical recording media capable of performing the method are disclosed.
JP 2004-246932 A

However, since an optical recording medium is easy to carry, the medium itself may be distributed to a third party, and recorded data and information may be leaked or stolen. If the optical recording medium on which information is recorded is recordable, the recorded data may be destroyed or tampered with, making it impossible to store the information safely.
Recently, in order to implement safe storage, various methods such as encryption of recorded data on optical recording media, setting of passwords during recording and reproduction, or holding key information necessary for reading information on external media, etc. Optical recording media equipped with various information security functions have been put into practical use. These optical recording media are basically handled as portable optical recording media. For example, the safe transport of data, such as browsing documents in related wards and exchanging and correcting data externally. Has brought.
Moreover, it is impossible to guarantee the leakage of information and confidential data held by each individual who owns a personal computer and those concerned.
Therefore, the present invention has been made in view of such circumstances, and an optical recording that can provide safe storage and recording of information and confidential data held by individuals and groups each having a personal computer. It is an object to provide a medium and a recording / reproducing apparatus.

In order to achieve the above object, in an optical recording medium to be used by recording or reproducing information in a recording / reproducing apparatus, information on the environment in which the optical recording medium is used is used before being used for information recording or reproduction. It is characterized in that it is recorded as initial information in a recordable area.
According to a second aspect of the present invention, in the optical recording medium according to the first aspect, the information relating to the environment is information relating to a computer main body.
According to a third aspect of the present invention, in the optical recording medium according to the first aspect, the present invention is information relating to a network environment to which a computer to which the information relating to the environment is used is connected.
According to a fourth aspect of the present invention, in the optical recording medium according to the first aspect, a first application for forming a plurality of sessions in the recordable area and recording the initial information in the recordable area, The first session is stored in the plurality of sessions.
According to a fifth aspect of the present invention, in the optical recording medium according to the fourth aspect of the present invention, information related to the environment is recorded in a second session among the plurality of sessions.
According to a sixth aspect of the present invention, in the optical recording medium according to the fourth aspect, the environment-related information is recorded in a second session among the plurality of sessions.
According to a seventh aspect of the present invention, in the optical recording medium according to the fourth aspect, a second application for determining whether or not the optical recording medium can be used is stored in the first session.
The invention according to claim 8 is the optical recording medium according to claim 4, characterized in that a third application for recording and reproducing information after the third session is stored in the first session. .
The invention according to claim 9 is the optical recording medium according to claim 1, wherein the first session storing the first, second, and third applications is provided in a read-only area. .
According to a tenth aspect of the present invention, there is provided a recording / reproducing apparatus for recording or reproducing an optical recording medium according to any one of the first to ninth aspects, wherein the information is recorded in the first session of the optical recording medium. Based on the application, the presence / absence of the initial information recorded in the second session is compared with the usage environment information acquired again. When the two environment information matches, the information is recorded onto and reproduced from the optical recording medium. It is possible to make it possible.

  According to the optical recording medium of the present invention, information relating to the environment in which the optical recording medium is used is recorded as initial information in the recordable area before being used for information recording or reproduction, thereby backing up documents and data. In this case, it can be used only in a backup environment or between authorized persons. As a result, it is possible to prevent use outside of the original environment such as a third party or an external personal computer, and to prevent unauthorized data tampering or erasure. It is possible to provide safe storage and recording of stored information and confidential data.

Hereinafter, embodiments of an optical recording medium of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an information recording / reproducing apparatus for recording or reproducing information on an optical recording medium according to an embodiment of the present invention.
The information recording / reproducing apparatus shown in FIG. 1 is a drive device mounted on a personal computer, for example, and can be written to a CD-R disc, a CD-RW disc, a DVD + RW disc, a DVD-RW disc, a DVD-RAM disc, etc. 1 is an optical disc apparatus such as a CD-R disc, a CD-RW drive, a DVD + RW drive, a DVD-RW drive, and a DVD-RAM drive for reading and writing information on an optical recording medium (hereinafter referred to as an optical disc) 1.
The optical disc 1 is a writable recording medium such as a CD-R disc, a CD-RW disc, a DVD + RW disc, a DVD-RW disc, or a DVD-RAM disc.
The spindle motor 2 is a motor that rotates the optical disc 1 at a predetermined rotational speed during data recording and data reproduction. The rotation control of the spindle motor 2 is performed by the rotation control unit 3.
The optical pickup 4 is a device that emits and irradiates a laser beam L with a predetermined recording power when recording data on the optical disc 1 and reproducing data recorded on the optical disc 1.
The actuator control unit 5 performs control to move the optical pickup 4 when focusing and tracking the optical disk 1.
The signal control unit 6 controls the reproduction signal output from the optical pickup 4 and the recording signal output to the optical pickup 4.
The drive controller 7 is constituted by a microcomputer including a CPU, a ROM, a RAM, and the like, and controls the entire information recording / reproducing apparatus.
In addition, the drive controller 7 acquires information about the use environment before using the optical disk 1 of the present embodiment for information recording or reproduction, and the acquired information is provided in the recordable area of the optical disk 1. The initial information is recorded in the session, or the presence / absence of the initial information recorded in the second session provided in the recordable area of the optical disc 1 is determined. Furthermore, the initial information recorded on the optical disc 1 is compared with the usage environment information acquired again, and after the third session provided in the recordable area of the optical disc 1 when it is determined that the optical disc 1 is usable. A control process for performing information recording or reproduction is also executed.
The buffer 8 is a memory used by the drive controller 7 as a temporary storage area for storing data. The laser drive circuit 9 drives the emission of the laser light L from the optical pickup 4.
The external interface 10 is used for transmitting / receiving commands, data, and the like to / from the host device 11. The host apparatus 11 is a host computer such as a personal computer that controls the information recording / reproducing apparatus.

Here, as the optical disc 1 of the present embodiment, there is one in which a recordable area for recording information exists on an optical recording medium for one disc as in the CD format.
First, a stamper is manufactured through the steps of applying a photoresist material to a glass master, laser exposure, development, and electroforming, and various optical disks 1 can be manufactured by a general method using this stamper. For example, in the case of a CD-R disc capable of recording once in the additionally recordable area, it can be produced by laminating an Al reflective layer and an acrylic resin protective layer on a polycarbonate substrate. In addition, a CD-RW disc that can be repeatedly recorded / erased in a recordable area has an inorganic dielectric protective layer, an inorganic phase change recording layer, an inorganic dielectric protective layer, an Al reflective layer, and an acrylic resin protective layer on a polycarbonate substrate. It can be manufactured by laminating.
In addition, the optical disc 1 of the present embodiment employs a multi-session method in which information is formed by a plurality of sessions on a single disc, and information can be recorded in units of sessions and recorded in a recordable area. As long as the capacity remains, additional writing can be performed multiple times.

FIG. 2 is a diagram schematically showing a multi-session format of the optical disc 1.
As shown in FIG. 2, the optical disc 1 includes a first session 21 for recording applications, a second session 22 for recording initial information, and a third session 23 which is a data / information recording area. The first and second sessions 21 and 22 are each provided with a lead-in area (LIA), a program area (PA), and a lead-out area (LOA).
Normally, when the information recording / reproducing apparatus described above records information on the optical disc 1 having a recordable area, desired data and information are recorded in the program area of the optical disc 1 by recording application software.
On the other hand, in this embodiment, before the optical disc 1 is used for recording or reproducing information, information on the environment in which the optical disc 1 is used is acquired by the information recording / reproducing apparatus, and the information is recorded on the optical disc 1. By recording the initial information in the second session 22 in the possible area, the use environment of the optical disk 1 is limited, and information can be safely stored, recorded, and reproduced. Acquisition of information relating to the environment in which the optical disc 1 is used and operations for recording this information as initial information are executed by the CPU of the drive controller 7 of the information recording / reproducing apparatus. Various applications executed by the CPU of the drive controller 7 are stored in the first session of the optical disc 1. Of course, various applications may be stored on the computer side which is the host device 11.
The application includes an application for recording initial information on the second session 22 of the optical disc 1 (first application), an application for determining whether the optical disc 1 can be used (second application), and the third session 23 and thereafter of the optical disc 1. There are applications for recording and reproducing information (third application).

FIG. 3 is a flowchart showing execution processing by an application stored in the optical disc 1 of the present embodiment. This application is executed by the drive controller 7. 3 shows a first application for recording initial information in the second session 22 of the optical disc 1 and a second application for determining whether or not the optical disc 1 can be used as a series of processes.
In this case, the drive controller 7 activates the application of the first session of the optical disc 1 (S1), and whether or not environment information for using the optical disc 1 is recorded as initial information in the second session of the optical disc 1. Is discriminated (S2).
Here, if it is determined that the initial information is recorded (“Yes” in S2), environmental information in which the optical disc 1 is used at that time is acquired (S3), and the second session 22 of the optical disc 1 is acquired. Compare with the recorded initial information (S4). As a result of the comparison, if it is determined that the two pieces of information match (“Yes” in S5), the optical disc 1 is enabled, that is, information, data can be recorded, reproduced, edited, and the like thereafter ( S6) The process ends.
On the other hand, as a result of the comparison, if it is determined that the two pieces of information do not match (“No” in S5), the optical disc 1 is invalidated (S7) and the process is terminated.
If it is determined in step S2 that the initial information is not recorded in the second session 22 of the optical disc 1 ("No" in S2), the initial information is stored in the second session 22 of the optical disc 1 using the current environment as the initial information. Is recorded (S8). When initial information is recorded (“Yes” in S8), the initial information is recorded in the second session 22 (S9). Then, it is determined whether or not to continue to use the optical disc 1 (S10). If the optical disc 1 is to be used continuously (“Yes” in S10), the process proceeds to step S3. “No”) The process is terminated.
If the initial information is not recorded in the second session 22 of the optical disc 1 in step S8, the process is terminated as it is.

Therefore, in this embodiment, it is possible to limit the usage environment of the optical disc 1 by recording information on the environment in which the optical disc 1 is used as initial information on the optical disc 1, and abuse of the optical disc 1 is avoided. Can be prevented.
Further, when information relating to the environment in which the optical disc 1 is used is recorded in the second session 22 in the recordable area of the optical disc 1 as information relating to the computer main body, the optical disc 1 itself can have originality for personal use. In addition, the safety of information storage, recording or reproduction can be improved. The information relating to the computer main body described here is local information unique to the computer, such as the system name, machine name, device name of the computer itself, or the user name or ID number of the user who uses the computer.
In particular, when the initial information recorded on the optical disk 1 is local information unique to the computer, such as the system name, machine name, device name of the computer itself, or the user name or user ID number of the computer, the optical disk No. 1 is effective only in the environment at the time when the initial information was recorded, so the security is strong, and it is useful for editing and managing privately owned confidential information.
When information on the environment in which the optical disk 1 is used is recorded in the second session 22 in the recordable area in the optical disk 1 as information on the network environment to which the computer is connected, for example, a group sharing information in the optical disk 1 It is possible to provide originality for use between departments and customers, and improve the safety of information storage, recording or reproduction. The information related to the network environment to which the computer is connected is information common to the network to which the computer is connected, such as a network domain name and a working group name.
In addition, when the initial information of the optical disc 1 is common information in the network to which the computer is connected, such as a network domain name or a working group name, the parties that share the optical disc 1 with the network domain name or working group name. Since they can be used by each other, it is useful for circulating, adding, and managing information shared within a group.

In the present embodiment, the information recording / reproducing apparatus acquires information about the environment in which the optical disc 1 is used, and records the acquired information as initial information in the second session 22 in the optical disc 1 (first application). ) In advance in the first session in the optical disc 1, it is not necessary to install the application in the computer in advance, so that the function of the optical recording medium can be used without selecting the computer to be used. Can do.
In the present embodiment, the presence of the initial information recorded in the second session 22 of the optical disc 1 is identified by the application (first and second applications), and the initial information is compared with the usage environment information acquired again. I made it. If the two environment information items coincide with each other, the information can be recorded or reproduced on the optical disc 1 to further enhance the safety of information storage, recording or reproduction on the optical disc 1.
Further, an application (third application) for recording or reproducing information after the third session of the optical disk 1 made available by the applications (first and second applications) in the optical disk 1 described above. When stored in the first session 21 of the optical disc 1, the initial information recorded in the second session, the use environment of the optical disc 1 is acquired by the application in the first session 21, and the usage of the optical disc 1 is further used. Since the use environment of the optical disc 1 is assured by the availability determination, it is possible to give security to data and information to be added after the third session 23 and thereafter.
Furthermore, if an application (third application) for adding / rewriting data and information after the third session is stored in the optical disc 1 in advance, there is an advantage that it is not necessary to install the application of the function in the computer in advance. .

Furthermore, in the present embodiment, a multi-session method in which a plurality of sessions are provided on one optical disc 1 to form information, and information on the environment of the computer main body is recorded in the second session 22 in the recordable area. Information can be recorded in session units, and additional recording can be performed multiple times as long as the capacity to be recorded in the recordable area remains.
Furthermore, the first application for recording the initial information in the second session 22 as the optical disc 1, the use environment of the optical disc 1 is acquired, the presence or absence of the initial information recorded in the second session 22 is determined, and the initial A first session 21 including a second application for comparing the information with the use environment information of the optical disc 1 and determining whether or not the optical disk 1 can be used, and a third application for adding and rewriting data and information after the third session. It was previously provided in the read-only area (ROM). In other words, the optical disc 1 of the present embodiment may be a hybrid disc in which the read-only area and the recordable area exist on one optical recording medium. If the optical disc 1 is configured in this way, the series of applications described above can be used in common in each computer environment, so the first session of the optical disc 1 composed of the entire recordable area is used as an information recording / reproducing apparatus one by one. Rather than producing the above-mentioned optical recording medium with the function, it is possible to mass-produce the optical disc 1 including the above-mentioned functions by making it exist as ROM data in advance, so that the production efficiency can be improved.

The block diagram which shows the structure of the information recording / reproducing apparatus which is embodiment of this invention. FIG. 3 is a schematic diagram of a multi-session format that is a recording format of the optical recording medium of the present embodiment. The flowchart which showed the process of the application currently recorded on the optical disk of this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Optical disk, 2 ... Spindle motor, 3 ... Rotation control part, 4 ... Optical pick-up, 5 ... Actuator control part, 6 ... Signal control part, 7 ... Drive controller, 8 ... Buffer, 9 ... Laser drive circuit, 10 ... External Interface, 11 ... host device, 21 ... first session, 22 ... second session, 23 ... third session

Claims (10)

  In an optical recording medium that is used by recording or reproducing information in a recording / reproducing apparatus, information about the environment in which the optical recording medium is used is initially recorded in the recordable area before being used for information recording or reproduction. An optical recording medium characterized by being recorded as   2. The optical recording medium according to claim 1, wherein the information on the environment is information on a computer main body.   2. The optical recording medium according to claim 1, wherein the optical recording medium is information relating to a network environment to which a computer to which the information relating to the environment is used is connected.   2. The optical recording medium according to claim 1, wherein a first application for forming a plurality of sessions in the recordable area and recording the initial information in the recordable area is a first session among the plurality of sessions. An optical recording medium stored in   5. The optical recording medium according to claim 4, wherein the information about the environment is recorded in a second session among the plurality of sessions.   5. The optical recording medium according to claim 4, wherein the information about the environment is recorded in a second session among the plurality of sessions.   5. The optical recording medium according to claim 4, wherein a second application for determining whether or not the optical recording medium can be used is stored in the first session.   5. The optical recording medium according to claim 4, wherein a third application for recording and reproducing information after the third session is stored in the first session.   2. The optical recording medium according to claim 1, wherein the first session storing the first, second, and third applications is provided in a read-only area.   The recording / reproducing apparatus for recording or reproducing the optical recording medium according to any one of claims 1 to 9, based on the application recorded in the first session of the optical recording medium. The presence / absence of the initial information recorded in the two sessions is compared with the usage environment information acquired again, and information recording and reproduction on the optical recording medium are enabled when the two environment information matches. Recording / playback device.

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