WO2015029164A1

WO2015029164A1 - Recording medium and determination device

Info

Publication number: WO2015029164A1
Application number: PCT/JP2013/073023
Authority: WO
Inventors: 冨田　吉美; 谷口　昭史; 横川　文彦; 弘行平野; 佐々木　儀央; 西脇　宏; 正次布施; 古川　淳一; 善二郎千葉; 徹藤井; 博哉垣本
Original assignee: パイオニア株式会社; パイオニアデジタルデザインアンドマニュファクチャリング株式会社; 三菱化学メディア株式会社; 太陽誘電株式会社
Priority date: 2013-08-28
Filing date: 2013-08-28
Publication date: 2015-03-05

Abstract

A recording medium (100, 200) is provided with a recording data area (130, 230) in which user data is recordable. In the recording medium, deterioration determination information including information indicating a region to be used for a deterioration determination for determining the degree of deterioration of the recording medium is recorded in an area different from the recording data area. By referring to the deterioration determination information when a deterioration inspection is performed on the recording medium, the time and the like can be significantly reduced compared with when the deterioration inspection is performed on the entire area of the recording medium.

Description

Recording medium and determination device

The present invention relates to a technical field of a recording medium such as a recordable optical disk and a determination device for determining the durability of the recording medium.

For example, important records such as official documents are stored as digital data, or company data is stored (that is, archived). The archive is expected to be accessible after a long period of time such as 10 years or more.

Here, as a recording medium used for the purpose of archiving, for example, a hard disk, an optical disk, or a tape can be considered. In particular, the optical disc does not need to use electric power for storage, and can be stored at a relatively low cost. Furthermore, since the optical disc has an error correction function, even if recorded information deteriorates to some extent, desired information can be read without error by this function.

Even in the case of an optical disk, if the recorded information deteriorates beyond the limit that can be compensated by the error correction function, the recorded information cannot be read correctly. Therefore, it is necessary to transfer information recorded on an optical disk used for archiving to a recording medium such as a new optical disk when a certain amount of time has elapsed to prevent loss of information.

For example, Patent Document 1 discloses a method for measuring characteristics of an optical disk ("Archiveability" in Patent Document 1) and moving information recorded on the optical disk to another recording medium based on the measured characteristics. It is described that it is judged whether or not.

Further, Patent Document 2 discloses that a part of a preformat pattern forming surface of a substrate of a recording medium and a recording layer of the recording medium are light reflectance, transmittance, absorption, Kerr rotation rate, birefringence, and the like. Describes a recording medium on which reference surfaces having different optical property degradation rates are formed. In particular, it is described that it is possible to detect the lifetime with high reliability by measuring the optical properties of the reference surface and the optical properties of the recording layer and comparing them.

Special table 2011-521392 gazette Japanese Patent Laid-Open No. 03-203830

However, the area on the optical disk where the deterioration of information is different for each optical disk. For this reason, the deterioration inspection must be performed over the entire area of the optical disk. In addition, a large amount of optical disks are used for archival purposes. Therefore, there is a technical problem in degradation inspection that, for example, enormous time and cost must be spent.

The present invention has been made in view of the above-mentioned problems, for example, and an object thereof is to provide a recording medium and a determination apparatus that can perform a deterioration inspection in a relatively short time.

In order to solve the above problems, the recording medium of the present invention is a recording medium having a recording data area in which user data can be recorded, and an area to be used in the deterioration determination for determining the degree of deterioration of the recording medium. Degradation determination information including information to be recorded is recorded in an area different from the recording data area.

In order to solve the above-described problem, the first determination apparatus of the present invention records deterioration determination information including information indicating an area to be used in deterioration determination for determining the degree of deterioration in a region different from the recording data region. A determination device for determining the serviceability of a recorded recording medium, comprising: a reading means for reading the recorded deterioration determination information; and reproducing the area of the recording medium indicated by the read deterioration determination information A reproducing unit that performs evaluation, a evaluating unit that evaluates a reproduction characteristic related to the reproduced region, and a determination unit that determines the durability based on an evaluation result by the evaluating unit.

In order to solve the above problem, the second determination apparatus of the present invention records deterioration determination information including information indicating an area to be used in deterioration determination for determining the degree of deterioration in a region different from the recording data region. A determination device for determining the serviceability of a recording medium that is being used, the determination device being connected to a reproduction device that reproduces the recording medium so as to be able to communicate with each other, and read by the reproduction device First acquisition means for acquiring the deterioration determination information, instruction means for instructing the reproduction apparatus to reproduce the area of the recording medium indicated by the acquired deterioration determination information, and an area reproduced by the reproduction apparatus A second acquisition unit configured to acquire an evaluation result of the reproduction characteristic; and a determination unit configured to determine the serviceability based on the acquired evaluation result.

The operation and other advantages of the present invention will be clarified from the embodiments to be described below.

1 is a schematic plan view showing a basic structure of an optical disc according to a first embodiment. It is an example of the information contained in deterioration determination information. It is a figure which shows an example of the secular change of the evaluation parameter | index which concerns on an optical disk. It is a schematic plan view which shows the basic structure of the optical disk based on 2nd Example. It is a block diagram which shows the structure of the determination apparatus which concerns on 3rd Example. It is a flowchart which shows the determination process which concerns on 3rd Example. It is a block diagram which shows the structure of the determination apparatus which concerns on 4th Example. It is a flowchart which shows the determination process which concerns on 4th Example.

Embodiments according to the recording medium and determination apparatus of the present invention will be described.

(recoding media)
The recording medium according to the embodiment is a recording medium having a recording data area in which user data can be recorded, and deterioration determination information including information indicating an area to be used in deterioration determination for determining the degree of deterioration of the recording medium. Are recorded in an area different from the recording data area.

According to the recording medium according to the embodiment, the recording medium includes a recording data area in which user data can be recorded. Particularly in the present embodiment, the deterioration determination information is recorded in an area different from the recording data area of the recording medium.

As described above, the deterioration determination information includes information indicating the area of the recording medium to be used in the deterioration determination. Note that the representation method of the area to be used in the deterioration determination may be appropriately determined according to the specification of the recording medium, such as address information.

Here, the manufacturer of the recording medium often performs a life estimation test on the recording medium, for example. In the life estimation test, for example, there is a standard such as ECMA-379 of ECMA (European Computer Manufacture Association) for optical disks. By using the result of such a life estimation test, it is possible to appropriately determine information indicating the area of the recording medium to be used in the deterioration determination.

When the deterioration determination is performed on the recording medium configured as described above, the deterioration determination may be performed only in the area indicated by the information included in the deterioration determination information. For this reason, compared with the case where deterioration determination is performed with respect to the whole area | region of a recording medium, the time etc. concerning deterioration determination can be reduced significantly.

In one aspect of the recording medium according to the embodiment, the area to be used for the deterioration determination is the area where the deterioration is the fastest in the recording data area.

According to this aspect, it is possible to appropriately determine the deterioration state of the recorded data and prevent the recorded data from being lost.

In another aspect of the recording medium according to the embodiment, the deterioration determination information includes information regarding an estimated useful life of the recording medium.

According to this aspect, the user can know the approximate useful life of the recording medium relatively easily, which is very advantageous in practice.

In this aspect, the deterioration determination information may further include information related to a method for estimating the estimated useful life.

According to this configuration, for example, even if the method for estimating the useful life used by the user and the method for estimating the estimated useful life recorded on the recording medium are different from each other, correction or the like is relatively easy. This is very advantageous in practice.

(First determination device)
The first determination apparatus according to the embodiment relates to a recording medium in which deterioration determination information including information indicating an area to be used in deterioration determination for determining the degree of deterioration is recorded in an area different from the recording data area. This is a determination device for determining the serviceability. The determination apparatus includes: a reading unit that reads recorded deterioration determination information; a reproducing unit that reproduces an area of the recording medium indicated by the read deterioration determination information; and an evaluation that evaluates reproduction characteristics related to the reproduced area Means, and determination means for determining the serviceability based on the evaluation result by the evaluation means.

According to the first determination apparatus according to the embodiment, the area of the recording medium indicated by the information included in the deterioration determination information is reproduced, and the durability of the recording medium is determined based on the evaluation result regarding the reproduction characteristics. judge.

According to the first determination apparatus according to the embodiment, it is possible to significantly reduce the time or the like related to the deterioration determination as compared with the case where the deterioration determination is performed on the entire area of the recording medium.

(Second determination device)
The second determination apparatus according to the embodiment relates to a recording medium in which deterioration determination information including information indicating an area to be used in deterioration determination for determining the degree of deterioration is recorded in an area different from the recording data area. This is a determination device for determining the serviceability. The determination apparatus is connected to a reproduction apparatus that reproduces the recording medium so as to be able to communicate with each other. That is, the determination device is a device independent of the playback device.

The determination device includes a first acquisition unit that acquires the deterioration determination information read by the reproduction device, an instruction unit that instructs the reproduction device to reproduce the area of the recording medium indicated by the acquired deterioration determination information, and the reproduction device 2nd acquisition means which acquires the evaluation result of the reproduction | regeneration characteristic which concerns on the area | region reproduced | regenerated by (2), and the determination means which determines durability based on the acquired evaluation result.

According to the second determination apparatus according to the embodiment, as in the first determination apparatus described above, the time for deterioration determination is greatly increased compared to the case where the deterioration determination is performed on the entire area of the recording medium. Can be reduced. In particular, according to the second determination apparatus, it can be used in combination with, for example, an existing reproduction apparatus, which is very advantageous in practice.

Embodiments according to the recording medium and determination apparatus of the present invention will be described with reference to the drawings. In the following embodiments, an optical disk is taken as an example of the recording medium of the present invention.

<First embodiment>
An optical disk according to the first embodiment will be described with reference to FIGS. FIG. 1 is a schematic plan view showing the basic structure of an optical disc according to the first embodiment.

In FIG. 1, on the recording surface side of the optical disc 100, from the center hole 150 side toward the outer periphery side of the optical disc 100, a BCA (Burst Cutting Area) 110, a disc management area 120, a recording data area 130, and a lead-out area 140 are provided. Is provided.

Particularly in the present embodiment, the BCA 110 is prerecorded with deterioration determination information including information indicating an area to be used in the deterioration determination for determining the degree of deterioration of the optical disc 100. Here, the deterioration determination information will be described with reference to FIG. FIG. 2 is an example of information included in the deterioration determination information.

As shown in FIG. 2, the deterioration determination information includes, for example, information indicating the manufacturer of the optical disc 100 (“disc manufacturer”), information indicating the estimated useful life of the optical disc 100 (“estimated useful life”), Information indicating a method for estimating the estimated useful life (“lifetime estimation method”), information indicating an area where degradation is estimated to be the fastest in the optical disc 100 (“shortest useful life position”), and information relating to the optical disc 100 Information indicating the manufacturing date (“manufacturing year”, “manufacturing month”, “manufacturing date”) and information indicating the serial number related to the optical disc 100 are included.

2 is an example of “information indicating an area to be used for deterioration determination” according to the present invention.

“The shortest service life position” may be obtained by the following method, for example. That is, an accelerated deterioration test is performed on an optical disc manufactured by the same manufacturing method as that of the optical disc 100. For example, the standard relating to ECMA-379 stipulates that at least three areas (for example, inner circumference, middle circumference, outer circumference, etc.) of the recording data area of the optical disc are tested.

An example of the result of the accelerated deterioration test is shown in FIG. FIG. 3 is a diagram illustrating an example of a time change of the evaluation index related to the optical disc.

FIG. 3 shows that the optical disk used in the accelerated deterioration test has the fastest deterioration in the middle area. In this case, the middle peripheral area of the optical disc corresponds to “the shortest service life position” in FIG. Then, information (for example, address information) indicating the middle circumference area of the optical disc is obtained as “the shortest service life position”.

Since deterioration determination information is recorded in advance on the optical disc 100, when performing deterioration determination on the optical disc 100, only the area indicated by the “shortest useful life position” included in the deterioration determination information should be evaluated. Since it is good, the time taken for the deterioration determination can be greatly reduced and, for example, the cost can be suppressed.

<Second embodiment>
An optical disk according to the second embodiment will be described with reference to FIG. FIG. 4 is a schematic plan view showing the basic structure of an optical disc according to the second embodiment having the same concept as in FIG.

4, a disc management area 220, a recording data area 230, and a lead-out area 240 are provided on the recording surface side of the optical disc 200 from the center hole 250 side toward the outer peripheral side of the optical disc 200.

In this embodiment, in particular, deterioration determination information is recorded in advance in the disc management area 220 of the optical disc 220. Since the deterioration determination information according to the present embodiment is the same as the deterioration determination information according to the first embodiment described above, description of the deterioration determination information is omitted.

<Third embodiment>
A determination apparatus according to the third embodiment will be described with reference to FIGS. FIG. 5 is a block diagram illustrating the configuration of the determination apparatus according to the third embodiment. In this embodiment, it is assumed that the deterioration determination is performed on the optical disc 200 according to the second embodiment described above.

In FIG. 5, a determination apparatus 300 includes a spindle motor 301, a pickup head 302, a servo unit 303, a CPU 304, a recording / reproducing unit 305, a recording data processing unit 306, a reproducing data processing unit 307, a shortest service life position information reading unit 308, and an evaluation. An index recording information unit 309, an archive system 310, and an alarm unit 311 are provided.

The reproduction data processing unit 307 is configured to be able to generate user reproduction data by acquiring a reproduction signal of the optical disc 200 via the recording / reproducing unit 305. On the other hand, the recording data processing unit 306 is configured to be able to generate a recording signal based on user recording data and transmit the generated recording signal to the recording / reproducing unit 305.

Next, the deterioration determination process executed by the determination apparatus 300 configured as described above will be described with reference to the flowchart of FIG.

In FIG. 6, after the optical disk 200 is set and the spindle motor 301 rotates (step S <b> 101), the servo unit so that the light emitted from the pickup head 102 is condensed on the recording surface of the optical disk 200 by the CPU 304. 303 is controlled (step S102).

Next, the CPU 304 controls the servo unit 303 so that the disk management area 220 (see FIG. 4) can be read (step S103). As a result, the light emitted from the pickup head 102 is collected on a part of the disc management area 220 of the optical disc 200.

Next, the service life information and the shortest service life position information are read from the deterioration determination information recorded in the disc management area 220 via the recording / playback unit 305 and the playback data processing unit 307 (steps S104 and S105). The read shortest service life position information is transmitted to the CPU 304 via the shortest service life position information reading unit 308.

Subsequently, the CPU 304 controls the servo unit 303 so that the light emitted from the pickup head 102 is condensed at the shortest service life position of the optical disc 200 indicated by the shortest service life position information (step S106).

Subsequently, a reproduction signal related to the shortest service life position of the optical disc 200 is transmitted to the evaluation index recording information unit 309 via the recording / reproducing unit 305 and the reproduction data processing unit 307. The evaluation index recording information unit 309 evaluates the characteristics of the optical disc 200 based on the received reproduction signal (step S107).

Next, the archive system 310 determines whether or not the degree of deterioration of the optical disc 200 is within an allowable range based on the result of the evaluation by the evaluation index recording information unit 309 (in other words, the information recorded on the optical disc 200 is stored in other ways). Whether or not it is necessary to move to another optical disc) is determined (step S109).

When it is determined that the degree of deterioration of the optical disc 200 is within the allowable range (step S109: Yes), the deterioration determination process is terminated. On the other hand, when it is determined that the degree of deterioration of the optical disc 200 exceeds the allowable range (step S109: No), the archive system 310 notifies the alarm unit 311 so as to notify, for example, that information needs to be moved. Is controlled (step S110), and the deterioration determination process is terminated.

Note that, when the deterioration determination process is performed on the optical disk 100 described in the first embodiment instead of the optical disk 200, the light emitted from the pickup head 102 in the process of step S103 is the BCA 110 ( The servo unit 303 is controlled so as to be focused on (see FIG. 1).

The “pickup head 302”, “servo unit 303”, “CPU 304”, “recording / reproducing unit 305”, “reproduction data processing unit 306”, and “shortest service life position information reading unit 308” according to the present embodiment are It is an example of "reading means" and "reproducing means" according to the invention. The “evaluation index record information unit 309” and the “archive system 310” according to the present embodiment are examples of the “evaluation unit” and the “determination unit” according to the present invention, respectively.

<Fourth embodiment>
A determination apparatus according to the fourth embodiment will be described with reference to FIGS. FIG. 7 is a block diagram showing the configuration of the determination apparatus according to the fourth embodiment having the same meaning as in FIG. In this embodiment, it is assumed that the deterioration determination is performed on the optical disc 200 according to the second embodiment described above.

7, the recording / reproducing apparatus 500 includes a spindle motor 501, a pickup head 502, a servo unit 503, a CPU 504, a recording / reproducing unit 505, a recording data processing unit 506, a reproduction data processing unit 507, and an evaluation index recording information unit 508. It is configured.

The reproduction data processing unit 507 is configured to be able to generate user reproduction data by acquiring a reproduction signal of the optical disc 200 via the recording / reproducing unit 505. On the other hand, the recording data processing unit 506 is configured to generate a recording signal based on the user recording data, and to transmit the generated recording signal to the recording / reproducing unit 505.

The determination apparatus 400 includes an archive system 401 and an alarm unit 402.

Next, the deterioration determination process executed by the determination apparatus 400 configured as described above will be described with reference to the flowchart of FIG.

In FIG. 8, after the optical disk 200 is set and the spindle motor 501 rotates (step S <b> 201), the servo unit so that the light emitted from the pickup head 502 is condensed on the recording surface of the optical disk 200 by the CPU 504. 503 is controlled (step S202).

Next, the CPU 504 controls the servo unit 503 so that the disk management area 220 (see FIG. 4) can be read (step S203). As a result, the light emitted from the pickup head 502 is condensed on a part of the disc management area 220 of the optical disc 200.

Next, the service life related information such as service life information and shortest service life position information is read from the deterioration determination information recorded in the disk management area 220 via the recording / playback unit 505 and the playback data processing unit 507. (Step S204). The read useful life related information is transmitted to the archive system 401 of the determination apparatus 400 via the evaluation index recording information unit 508 (step S205).

Next, the archive system 401 reads the shortest service life position information included in the service life related information (step S301). Subsequently, the archive system 401 transmits the shortest service life position of the optical disc 200 indicated by the read shortest service life position information to the CPU 504 of the recording / reproducing apparatus 500 (step S302).

Next, the CPU 504 controls the servo unit 503 so that the light emitted from the pickup head 102 is condensed at the shortest service life position of the optical disc 200 (step S206).

Subsequently, a reproduction signal related to the shortest service life position of the optical disc 200 is transmitted to the evaluation index recording information unit 508 via the recording / reproducing unit 505 and the reproduction data processing unit 507. The evaluation index recording information unit 508 evaluates the characteristics of the optical disc 200 based on the received reproduction signal (step S207).

Thereafter, the evaluation index record information unit 508 transmits the evaluation result to the archive system 401 of the determination apparatus 400 (step S208). The archive system 401 that has acquired the evaluation result starts to determine the durability of the optical disc 200 (step S303).

Subsequently, based on the obtained evaluation result, the archive system 401 determines whether or not the degree of deterioration of the optical disc 200 is within an allowable range (in other words, moves information recorded on the optical disc 200 to another optical disc). It is determined whether or not it is necessary (step S304).

When it is determined that the degree of deterioration of the optical disc 200 is within the allowable range (step S304: Yes), the deterioration determination process is terminated. On the other hand, when it is determined that the degree of deterioration of the optical disc 200 exceeds the allowable range (step S304: No), the archive system 401 notifies the alarm unit 402 so as to notify that the information needs to be moved, for example. Is controlled (step S305), and the deterioration determination process is terminated.

The “archive system 401” according to the present embodiment is an example of the “first acquisition unit”, “instruction unit”, “second acquisition unit”, and “determination unit” according to the present invention.

The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit or concept of the invention that can be read from the claims and the entire specification. The apparatus is also included in the technical scope of the present invention.

100, 200 ... optical disc, 110 ... BCA, 120, 220 ... disc management area, 130, 230 ... recording data area, 140, 240 ... lead-out area, 150, 250 ... center hole, 300, 400 ... judgment device, 310, 401 ... Archive system, 311, 402 ... Alarm unit, 500 ... Recording / reproducing apparatus

Claims

A recording medium having a recording data area capable of recording user data,
A recording medium, wherein deterioration determination information including information indicating an area to be used in deterioration determination for determining the degree of deterioration of the recording medium is recorded in an area different from the recording data area.
2. The recording medium according to claim 1, wherein the area to be used in the deterioration determination is an area where deterioration is the fastest in the recording data area.
The recording medium according to claim 1, wherein the deterioration determination information includes information related to an estimated useful life of the recording medium.
The recording medium according to claim 3, wherein the deterioration determination information further includes information on a method for estimating the estimated useful life.
A determination apparatus for determining the durability of a recording medium in which deterioration determination information including information indicating an area to be used in deterioration determination for determining a degree of deterioration is recorded in an area different from a recording data area. ,
Reading means for reading the recorded deterioration determination information;
Reproducing means for reproducing the area of the recording medium indicated by the read deterioration determination information;
An evaluation means for evaluating reproduction characteristics relating to the reproduced area;
Determination means for determining the serviceability based on the evaluation result by the evaluation means;
A determination apparatus comprising:
A determination apparatus for determining the durability of a recording medium in which deterioration determination information including information indicating an area to be used in deterioration determination for determining a degree of deterioration is recorded in an area different from a recording data area. ,
The determination apparatus is connected to a reproduction apparatus that reproduces the recording medium so as to be able to communicate with each other.
First acquisition means for acquiring the deterioration determination information read by the playback device;
Instruction means for instructing the reproduction apparatus to reproduce the area of the recording medium indicated by the acquired deterioration determination information;
Second acquisition means for acquiring an evaluation result of reproduction characteristics relating to the area reproduced by the reproduction device;
Determination means for determining the serviceability based on the obtained evaluation result;
A determination apparatus comprising: