WO2005024805A1 - Support d'enregistrement d'informations - Google Patents

Support d'enregistrement d'informations Download PDF

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Publication number
WO2005024805A1
WO2005024805A1 PCT/JP2004/012639 JP2004012639W WO2005024805A1 WO 2005024805 A1 WO2005024805 A1 WO 2005024805A1 JP 2004012639 W JP2004012639 W JP 2004012639W WO 2005024805 A1 WO2005024805 A1 WO 2005024805A1
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WO
WIPO (PCT)
Prior art keywords
information
recording
area
reproduction
recorded
Prior art date
Application number
PCT/JP2004/012639
Other languages
English (en)
Japanese (ja)
Inventor
Kazuo Kuroda
Eiji Muramatsu
Akira Imamura
Original Assignee
Pioneer Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Corporation filed Critical Pioneer Corporation
Priority to JP2005513648A priority Critical patent/JPWO2005024805A1/ja
Publication of WO2005024805A1 publication Critical patent/WO2005024805A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24079—Width or depth

Definitions

  • the present invention belongs to the technical field of an information recording medium such as an optical disc that can be recorded and reproduced by irradiating a laser, for example.
  • the power of a laser beam capable of reproducing information (ie, energy or light intensity) so that the information is not accidentally erased during reproduction by laser beam irradiation. )
  • reproducing power range is lower than the range of laser beam power capable of erasing recorded information
  • erasing power range is set.
  • the range of the power of the laser beam capable of recording information is set higher than the erasing power range.
  • reproduction power range, erasing power range, and recording power range are specific to the recording layer, and such settings can be generally obtained by the material and thickness of the recording layer.
  • the information recording / reproducing apparatus is configured to irradiate the recording laser with a much higher power than the reproducing laser.
  • Patent Literature 1 discloses that the power of a reproducing laser of an information recording / reproducing apparatus is increased to near the power at which information data on an information recording medium is erased, and the reproducing laser is controlled a certain number of times. There is disclosed a technique for erasing recorded information by irradiating the information.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2001-331942
  • Patent Document 2 JP 2001-67731 A
  • the present invention has been made in view of, for example, the above-described problems, and provides an information recording medium that can easily limit the number of times of reproduction and that can be reused relatively easily. That is the task.
  • the information recording medium according to claim 1 of the present invention includes a read-only area in which first recording information is recorded in advance, and a non-reproducible area which becomes unreproducible with a reproducing operation. 2 has a reproduction number limitation area in which recording information is recorded.
  • the embodiment according to the information recording medium of the present invention includes a reproduction-only area in which the first recording information is recorded in advance, and a reproduction frequency limit in which the second recording information which becomes unreproducible with the reproduction operation is recorded. Region.
  • the second recording information recorded in the reproduction number limitation area by the information reproduction device is once or plural times by a predetermined number of times. Can only be played.
  • the first record information recorded in the read-only area can be reproduced.
  • the second recording information can no longer be reproduced, for example, the second recording information is erased in accordance with the reproduction operation of the predetermined number of times.
  • the first recorded information may be kept reproducible.
  • the reproduction of the first recording information may be disabled.
  • the second record information is recorded so that the second record information is necessary to reproduce the first record information
  • the second record information is reproduced a predetermined number of times. If only the second record information is recorded again after the first record information becomes unreproducible, the first record information is maintained as it is, so the first and second record information can be reproduced after all. State can be restored. Thus, the information recording medium can be reused.
  • the second recording information may be configured to be reproducible only once as the predetermined number of times in the reproduction number limited area.
  • the reproduction may be performed a plurality of times, such as two, three, or four times, as the predetermined number of times.
  • the number of reproduction times may be strictly limited, for example, only once or only twice, or the number of reproduction times may be restricted in a certain number range, for example, about five times or about ten times. .
  • the content of a large amount of information data such as a movie can be recorded in the read-only area at once using a stamper as the first recording information, so that the time required to create one information recording medium can be shortened, and productivity can be reduced. Can also be improved.
  • the second recording information is reproduction control information necessary for reproducing the first recording information recorded in the reproduction-only area. It is characterized by the following.
  • the second recording information reproduction control information such as control data, an encryption key, a file system, and an address necessary for reproducing the first recording information is recorded. Therefore, after the second recording information is made unreproducible by being erased, for example, it is also impossible to reproduce the first recording information such as content information. Therefore, it is possible to make a relatively small amount of the second recording information unreproducible and a relatively large amount of the first recording information unreproducible. You can put a limit on the number of playbacks for. Furthermore, since a relatively large amount of the first record information is maintained as it is, it is extremely efficient only by recording a relatively small amount of the second record information again after the reproduction is once impossible. The entire information recording medium can be reused.
  • the limited number of times of reproduction includes a reproduction power range for enabling recorded recorded information to be reproduced and erasing the recorded information.
  • the erasing power range unique to the recording layer on which the second recording information is recorded overlaps the reproduction power range.
  • the reproduction laser is irradiated a predetermined number of times, typically once, the second recorded information is erased while being reproduced.
  • the information recording medium is read-only for which recording of the second recording information by the information recording device or the information recording / reproducing device is not permitted. It has a flag to the effect.
  • the information recording apparatus or information recording / reproducing apparatus such as an optical disk recorder owned by the user adopts a standard in which the recording of the second recording information is not permitted according to the flag, whereby the information recording is performed.
  • the recording of the second recording information which is not intended by the medium provider, is performed, thereby preventing unauthorized reproduction of the restricted chopsticks exceeding the number of times of reproduction.
  • recording cannot be performed by a normal write-once information recording device such as a DVD-R or a rewritable information recording device such as a DVD-R / W conforming to such a standard.
  • the person who recovers the information recording medium re-records the second recording information by, for example, irradiating a recording laser in a special power range with a special process of invalidating such a flag. And the information recording medium can be reused.
  • the information recording medium includes a substrate, a first recording layer formed on the substrate, and a second recording layer formed on the substrate.
  • a first pit corresponding to the first recording information is formed in the first recording layer in the reproduction-only area, and the reproduction count restriction area corresponds to the second recording information. With said A second pit different from the first pit is formed in the second recording layer.
  • first pits such as pits formed by embossing, pits formed by drilling, pits formed by phase change, and pits formed by a change in refractive index correspond to the first recording information.
  • a second pit due to a phase change in the recording layer is formed in the second recording layer corresponding to the second recording information.
  • the second recording layer is formed directly or indirectly on the first recording layer with another interlayer insulating phase interposed therebetween.
  • the first recording layer may be formed on one surface of the substrate, and the second recording layer may be formed on the other surface of the substrate.
  • the optical disk may be constructed as a two-layer single-sided optical disk, that is, a so-called dual-layer optical disk, or may be constructed as a single-layer double-sided optical disk, that is, a so-called double-sided optical disk.
  • the second recording information can be recorded on the second recording layer by irradiating the recording laser, and the recorded second recording information can be recorded by irradiating the reproducing laser.
  • the second recording layer can be reproduced only once, and in the second recording layer, the reproduction power range in which the second recording information can be reproduced is at least partially equal to the erasing power range in which the second recording information is erasable. May be configured so as to have recording characteristics that overlap.
  • the reproduction power range and the erasure power range, which are specific to the second recording layer, do not overlap, and the reproduction laser power is set to be high as described in Patent Document 1, whereby reproduction is performed. It may be configured to limit the number of times.
  • the information recording medium includes a substrate, and a single recording layer formed on the substrate.
  • a first pit corresponding to one recording information is formed in the single recording layer, and a reproduction number limited area corresponds to the second recording information and has a different type of first pit from the first pit.
  • Two pits are formed on the single recording layer.
  • first pits such as pits formed by embossing the substrate are formed on a single recording layer corresponding to the first recording information.
  • a second pit due to a phase change in a single recording layer is formed in a single recording layer corresponding to the second recording information.
  • a single recording layer is formed directly or indirectly on a substrate embossed by a stamper. This In this case, since a single recording layer may be formed over the entire area on the substrate including both the reproduction-only area and the reproduction count restriction area, the single recording layer can be formed relatively easily. Further, a reflective layer or the like may be separately formed on the back side of the single recording layer when viewed from the irradiation direction of the reproducing laser.
  • the second recording information can be recorded on a single recording layer by irradiating the recording laser, and the second recording information recorded by irradiating the reproducing laser can be read only once.
  • the single recording layer is reproducible, and the single recording layer at least partially overlaps a reproduction power range in which the second record information can be reproduced and an erase power range in which the second record information can be erased. It may be configured to have recording characteristics.
  • the reproduction power range and the erasure power range which are specific to a single recording layer, do not overlap, and by setting the power of the reproduction laser high as in Patent Document 1, The number of times of reproduction may be limited.
  • the first pit is formed by a portion of the read-only area where the first pit is formed and the second pit.
  • the configuration may be such that unevenness is formed differently from the area where one pit is not formed.
  • the first pit formed of the concavities and convexities due to the embossing process on the substrate is formed so as not to be erased by the irradiation of the reproduction laser, so that the first recording information is stored in the reproduction-only area. Can be recorded so that it can be reproduced any number of times.
  • the second pit is formed by a portion of the reproduction number limited region where the second pit is formed. It may be configured such that optical characteristics are different from each other in a region where the second pit is not formed.
  • the second pit blackened due to a phase change is formed so as to be erased by irradiation of the reproduction laser (that is, becomes non-black), so that the number of reproduction times is limited.
  • the second recording information can be recorded so as to be erasable with the reproduction operation.
  • the information recording medium includes a disk-shaped substrate, and the read-only area is provided on one of an inner peripheral side and an outer peripheral side on the substrate. And the reproduction frequency restriction region is disposed on the other of the inner peripheral side and the outer peripheral side on the substrate.
  • the second recording information recorded in the reproduction frequency limited area arranged on the inner circumference side or the outer circumference side on the disk-shaped substrate can be reproduced by the predetermined number of reproduction operations. Disappears. Then, with respect to the remaining outer peripheral side or the reproduction only area arranged collectively on the outer peripheral side, the content information as the first recording information on the premise of the reproduction of the second recording information cannot be reproduced, or Only the content information as the first recording information, which is unrelated to the second recording information, can be reproduced. In particular, when the pits in the read-only area are formed by the stamper, they can be formed collectively.
  • the reproduction-only area and the reproduction number restriction area are alternately arranged.
  • the predetermined number of reproduction operations it becomes impossible to reproduce the second record information recorded in the reproduction number limited areas alternately arranged on the disk-shaped substrate. Then, for the read-only areas alternately arranged, the content information as the first record information on which the second record information is premised is made unreproducible, or the first record information is unrelated to the second record information. Only the content information as the recording information can be reproduced.
  • the second recording information is recorded in the reproduction count restriction area by irradiation of a recording laser.
  • an information recording medium that cannot be reproduced with a predetermined number of reproduction operations by use of the information reproducing apparatus by a user is collected by a collection company or a provider. After that, the second record information can be recorded again by the irradiation of the recording laser by the collection companies. Thus, the reuse of the information recording medium can be relatively easily performed.
  • a group is formed at least in the reproduction count restriction area, and the second recording information is recorded along the gnoleb. .
  • the group is caused to function as a recording track, and the second Recorded information can be recorded and reproduced relatively easily.
  • the number-of-reproductions limit area extends long along the track, there is an effect of disc eccentricity and the like, so that the group makes the recording process generally easier.
  • a group is not necessarily required in the read-only area where the first recording information is recorded by a stamper or the like, but may be formed to facilitate tracking or the like.
  • the reproduction-only area and the reproduction number restriction area are provided, the number of reproductions can be relatively easily limited. In addition, reuse is relatively easy.
  • FIG. 1 shows a basic structure of an optical disc which is an embodiment of the information recording medium of the present invention
  • an upper part is a schematic plan view of an optical disc having a plurality of recording areas, and a lower part corresponding thereto is shown.
  • the part is a schematic conceptual diagram of the recording area structure in the radial direction.
  • the information recording medium is capable of reproducing the recorded information only once or a plurality of times with a limited number of times in the limited number of times of reproduction, and is also capable of reproducing the recorded information once or with a limited number of times.
  • the recorded information is erased by the number of reproductions, and the recorded information can be recorded again after the erasure, and the recording, reproducing (erasing), and re-recording processes can be repeated many times. Consists of a once-type optical disk.
  • the read-only area is a ROM-type optical disc capable of physically reproducing recorded information any number of times.
  • the information recording medium is constructed as a hybrid disc having both the number-of-reproduction-limits area and the reproduction-only area as the whole disc. Record content information such as video information and music information as described below.
  • the area to be reproduced is generally a reproduction-only area, and at least a part of the area for recording the information for controlling the reproduction of the content information is a reproduction number limited area.
  • the optical disc 100 is, for example, on a recording surface on a disc body having a diameter of about 12 cm like a DVD, with the center hole 1 as the center, from the inner peripheral side to the outer peripheral side.
  • a lead-in area 101, a data zone 102, and a lead-out area 103 according to the example are provided. Further, a control data area described later is provided in the lead-in area 101, and a file management information recording area described later is provided in the data zone 102.
  • tracks 10 such as a gnoreve track and a land track are alternately provided spirally or concentrically around the center hole 1.
  • Sector 11 is a data management unit based on a pre-format address in which recording information can be corrected for errors. Further, in the present embodiment, a recording unit in which 16 such sectors 11 are collected is defined as one ECC (Error Correction Code) block.
  • ECC Error Correction Code
  • the optical disc 100 of the present invention may not have a single-layer structure. It may be a two-layer single side, that is, a dual layer or a single layer both sides, that is, a double side.
  • FIG. 2 is a graph showing a specific example of the reproduction power range, the erasure power range, and the recording power range in such a recording layer.
  • the vertical axis indicates the value of the laser power in units of mW (milliwatts)
  • the horizontal axis indicates the type of laser of the optical disk according to the present embodiment (in FIG. Erasing and recording lasers).
  • the recording layer of the optical disc according to the embodiment of the present invention is formed such that the reproduction power range is 0.7 mW or less in principle. Further, the recording layer may be formed so that the reproducing power range is not less than 0.2 mW and not more than 0.7 mW in order to overlap the erasing power range and the reproducing power range described later. The recording layer is formed so that the erase power range is not less than 0.2 mW and not more than 1. OmW. The range is formed to be not less than 0.7 mW and not more than 2 mW.
  • the reproduction power range and the reproduction power range recommended when reproducing reproduction-only media such as a DVD-ROM are recommended. If reproduction is performed by irradiating a laser having a power within the range where the erasing power range according to the embodiment overlaps as a reproduction laser, it is possible to erase recorded information while reproducing it.
  • the reproducing power range and the erasing power range may overlap at a rate of, for example, 50% or more. Further, the erasing power range may include the reproduction power range.
  • the recording power range of the recording layer of a rewritable information recording medium such as a commercially available DVD-RZW or a write-once information recording medium such as a DV D-R and the recording of the optical disc according to the present embodiment are described.
  • the recording power ranges of the layers do not overlap. Therefore, it is not possible to record on the optical disk according to the present embodiment by a commercially available rewritable or write-once type information recording medium writer. For this reason, the recording information is re-recorded in a manner not intended by the provider of the optical disc 100, and unauthorized reproduction exceeding the number of times of reproduction of the restricted harm can be prevented.
  • a recoverer for example, a provider
  • the optical disc 100 can re-record the recording information by irradiating the recording laser as shown in FIG. 2, and the optical disc 100 can be reused.
  • data refers to data to be mainly played back or executed, for example, content data such as image data, audio data, and document data. And data for computer programs.
  • FIG. 3 is a schematic structural diagram showing the structure of the recording area of the optical disc according to the first embodiment of the present invention, the reproduction-only area 160, and the reproduction count restriction area 150.
  • the left side in FIG. 3 is the inner peripheral side of the optical disc 100, and the right side in FIG.
  • a lead-in area 101 exists on the inner circumference side
  • a data zone 102 exists on the outer circumference side of the lead-in area 101
  • the data zone 102 exists.
  • a lead-out area 103 exists on the outer peripheral side of 102.
  • control information is information for controlling recording and reproduction to and from the data zone 102, and includes, for example, information indicating an attribute and a type of an information recording medium, information for managing data addresses, for example, information on a disk drive or the like. This is information for controlling the recording and reproducing operations of the recording and reproducing device. More specifically, a control data area 101A is provided on the outer peripheral side in the lead-in area 101. The control data area 101A is an area for recording control information for controlling recording and reading on the data zone 102, as described in detail later.
  • the data zone 102 is a main area for recording data. More specifically, a file management information recording area 102A is provided on the inner peripheral side in the data zone 102. In the file management information recording area 102A, for example, space bitmap information indicating a recorded or unrecorded state for each logical or physical block of the file system or the recording area is recorded.
  • control information and management information and data recorded on the information recording medium described above cannot always be clearly distinguished according to their contents.
  • control information and management information are mainly used directly for controlling the operation of an information recording / reproducing device such as a disk drive, whereas data is mainly used for information recording / reproducing in an information recording / reproducing device.
  • Data that is only of interest primarily This data is used in the data reproduction process or program execution process of the host computer.
  • data is recorded in the data zone 102, and control information and management information are stored in the control data area 101A, the lead-out area 103, or the data zone 102 in the lead-in area 101. Is recorded in the file management information recording area 102A.
  • the file management information recording area 102 A in the data zone 102 is configured as a reproduction count restriction area 150.
  • the file management information recording area 102A for example, the above-described file system, space bitmap information, etc., which constitute an example of the “second recording information” according to the present invention, are recorded.
  • All areas in the data zone 102 other than the file management information recording area 102A, the lead-in area 101, and the lead-out area 103 are configured as, for example, a read-only area 160 in which embossed pits are formed.
  • User data and the like that constitute an example of “first recording information” according to the present invention are recorded.
  • the user data and the like recorded in the read-only area 160 are physically reproducible many times by being recorded using, for example, pits or the like by embossing.
  • it cannot be normally reproduced unless it is based on the file system or the like reproduced from the reproduction count restriction area 150. That is, for example, after the information recorded using the pits due to the phase change is erased and the reproduction in the reproduction number limitation area 150 is physically disabled, the normal optical disk player or optical disk recorder or the like uses The entire optical disc 100 cannot be normally reproduced. After that, if the file system or the like is re-recorded by the recoverer or the like, the entire optical disk 100 can be normally (one time or a predetermined number of times) reproduced by a normal optical disk player or an optical disk recorder.
  • the first embodiment it is preferable that there be a group in view of the property that recording is performed a plurality of times and that a large amount of continuous data is recorded in the file management information recording area 102A.
  • the physical structure of this group, the number-of-reproductions-restricted area 150, and the reproduction-only area 160 will be described in detail based on the twelfth and seventeenth embodiments with reference to FIGS.
  • the actual operation in the first embodiment is as follows. This will be described with reference to FIG. 16 described later.
  • control data area 101A is a recording area in which, for example, control data such as copyright information and information for preventing unauthorized copying is recorded before shipment from a factory.
  • FIG. 4 is a schematic structural diagram showing the structure of the recording area of the optical disc, the reproduction-only area 160, and the reproduction count restriction area 150 according to the second embodiment of the present invention.
  • the structure of the recording area of the optical disc 100 according to the second embodiment in FIG. 4 and the positional relationship between the inner circumference and the outer circumference of the optical disc 100 according to the second embodiment are substantially the same as those in FIG. 3 showing the first embodiment.
  • control data area 101 A in the lead-in area 101 is configured as a reproduction count restriction area 150.
  • control data area 101A for example, the above-described control data that constitutes another example of the “second recording information” according to the present invention is recorded. All areas in the lead-in area 101, the data zone 102, and the lead-out area 103 other than the control data area 101A are configured as, for example, a read-only area 160 in which embossed pits are formed.
  • the user data and the like that constitute an example of the “first recording information” according to the present invention are recorded.
  • the user data and the like recorded in the reproduction-only area 160 are physically recorded in a state that can be reproduced any number of times, they are logically limited in the number of times of reproduction. Normal reproduction is not possible unless it is based on the control data reproduced from the area 150. That is, after the reproduction in the reproduction number limited area 150 is physically disabled, the entire optical disk 100 cannot be normally reproduced by a normal optical disk player or an optical disk recorder. Then, if the control data is re-recorded by a recoverer or the like, the entire optical disc 100 can be normally (one time or a predetermined number of times) reproduced by a normal optical disc player or optical disc recorder. (Third Embodiment)
  • the structure of the recording area in the optical disc according to the third embodiment of the present invention, the information and data recorded on the optical disc, and the encrypt constructed as an example of the reproduction count restriction area 150 The recording area of the short key recording area 104 will be described.
  • FIG. 5 is a schematic structural diagram showing the structure of the recording area of the optical disc according to the third embodiment of the present invention, a reproduction-only area 160, and a reproduction count restriction area 150.
  • the structure of the recording area of the optical disc 100 according to the third embodiment in FIG. 5 and the positional relationship between the inner circumference and the outer circumference of the optical disc 100 according to the third embodiment are substantially the same as those in FIG. 3 showing the first embodiment.
  • the encryption key recording area 104 is recorded on the S-track of the encryption key (encryption key), for example, in a recording unit of 2 ECC blocks, that is, 32 sectors. Area.
  • the encryption key recording area 104 is located in the data zone 102, but may be located in the lead-in area 101 or the like.
  • This encryption key recording area 150 , The number of times of reproduction limit area 150.
  • the above-mentioned encryption key (encryption key) that constitutes another example of the “second recording information” according to the present invention is recorded.
  • All areas in the data zone 102, the lead-in area 101, and the lead-out area 103 other than the encryption key recording area 104 are configured as, for example, a read-only area 160 in which embossed pits are formed.
  • the encrypted data area 105 that is, the area where the user data encrypted with the encryption key recorded in the encryption key recording area 104 or the user data that is not encrypted is recorded.
  • the user data and the like recorded in the read-only area 160 are physically recorded in a state that can be reproduced any number of times, they are logically limited in the number of times of reproduction. Unless it is based on the Encryption Key played from region 150, it can be played normally. In other words, it is considered physically impossible to reproduce in the reproduction frequency limitation area 150. After that, the entire optical disc 100 cannot be normally reproduced by a normal optical disc player or an optical disc recorder. After that, if the collecting person or the like re-records the ENTRY KEY, the entire optical disc 100 can be reproduced normally (once or a predetermined number of times) by a normal optical disc player or an optical disc recorder.
  • FIG. 6 the structure of a recording area in an optical disc according to a fourth embodiment of the present invention, information and data recorded on the optical disc, and address information recording constructed as an example of a reproduction count restriction area 150
  • the recording area of the area 106 will be described.
  • FIG. 6 is a schematic structural diagram showing the structure of the recording area of the optical disc according to the fourth embodiment of the present invention, the reproduction-only area 160, and the reproduction count restriction area 150.
  • the structure of the recording area of the optical disc according to the fourth embodiment in FIG. 6 and the positional relationship between the inner circumference and the outer circumference of the optical disc 100 are almost the same as those in FIG. 3 showing the first embodiment.
  • the address information recording area 106 is an area in which address information is recorded on a track, for example, in a recording unit of a sector.
  • one or a plurality of address information recording areas 106 in the data zone 102 are configured as a reproduction count restriction area 150.
  • the address information recording area 106 for example, the above-described address information that constitutes another example of the “second recording information” according to the present invention is recorded.
  • All areas in the data zone 102, the read-in area 101, and the lead-out area 103 other than the address information recording area 106 are configured as, for example, a read-only area 160 in which emboss pits are formed.
  • User data and the like that constitute an example of the “first recording information”.
  • a gnolev is formed in the address information recording area 106 in consideration of the fact that recording is not performed a large number of times, and that a small amount of discontinuous data is recorded. It is preferable not to do so.
  • the user data and the like recorded in the reproduction-only area 160 are physically recorded in a state that can be reproduced any number of times. Normal playback is not possible unless it is based on the address information played back from area 150. Good. That is, after the reproduction in the reproduction number limitation area 150 is physically disabled, the entire optical disk 100 cannot be normally reproduced by a normal optical disk player or optical disk recorder. After that, if the address information is re-recorded by the collecting person or the like, the entire optical disc 100 can be reproduced normally (once or a predetermined number of times) by a normal optical disc player or an optical disc recorder again. Become.
  • the structure of the recording area of the optical disc 100 according to the fifth embodiment of the present invention, the information and data recorded on the optical disc 100, and the menu file constructed as an example of the reproduction count restriction area 150 The recording area of the recording area will be described.
  • FIG. 7 is a schematic structural diagram showing the structure of the recording area of the optical disc 100 according to the fifth embodiment of the present invention, a reproduction-only area 160, and a reproduction count restriction area 150. Note that the structure of the recording area of the optical disc 100 according to the fifth embodiment in FIG. 7 and the positional relationship between the inner circumference and the outer circumference of the optical disc 100 are substantially the same as those in FIG. 3 showing the first embodiment.
  • the menu file recording area is an area in which a menu file is recorded on a track, for example, in a recording unit of a sector.
  • the area in which the child menu displayed next to the parent menu is recorded is referred to as a child menu file recording area 108.
  • the parent menu file recording area 107 or the child menu file recording area 108 may be located in the force lead-in area 101 in the data zone 102 or the like.
  • the parent menu file recording area 107 in the data zone 102 is configured as a reproduction count restriction area 150.
  • parent menu information indicating the parent menu described above, which constitutes another example of the “second recording information” according to the present invention is recorded.
  • All areas in the data zone 102, the lead-in area 101, and the lead-out area 103 other than the parent menu file recording area 107 are configured as, for example, a reproduction-only area 160 in which embossed pits are formed.
  • the child menu file recording area 108 is also configured as a read-only area 160. In these areas, child menu information and the like indicating child menus constituting an example of the “first recording information” according to the present invention are recorded.
  • the user data and the like recorded in the read-only area 160 are physically recorded in a state that can be reproduced any number of times. Normal reproduction is not possible unless based on the parent menu information reproduced from the area 150. That is, after the reproduction in the reproduction limit area 150 is physically disabled, the entire optical disk 100 cannot be normally reproduced by a normal optical disk player or optical disk recorder. Then, if the parent menu information is re-recorded by the recoverer or the like, the entire optical disk 100 can be normally (one time or a predetermined number of times) reproduced by a normal optical disk player or optical disk recorder again. .
  • the playback-only area that is, the playback-only area 160 and the number-of-times-restricted area, that is, the number-of-times-of-playback area 150
  • the playback-only area that is, the playback-only area 160
  • the number-of-times-restricted area that is, the number-of-times-of-playback area 150
  • FIGS. 8A to 8F are schematic sectional views showing the physical structure of the optical disc according to the sixth to eleventh embodiments of the present invention, respectively.
  • a vertical line "X" indicates the rotation center axis of the optical disk.
  • the optical disc according to the sixth embodiment is, for example, a dual-layer disc, that is, a two-layer single-sided disc.
  • the double-layer single-sided disk is an optical disk that reads the recording surface of the two bonded disks from one side.
  • the reflective film of the first-layer disk is made translucent and the adhesive is made transparent.
  • making the depth of focus shallow makes the first layer (closer to the pickup) accessible, and increasing the depth of focus makes the second layer (farther from the pickup) recording.
  • the layers are accessible.
  • a read-only area 160 in which, for example, embossed pits are formed is arranged on the pickup side, that is, in the first layer on the lower side in the figure.
  • An area 150 is located.
  • dubnoleside that is, a single-layer double-sided disc may be used. Further, a double-layer double-sided disc may be further developed. With this double-layer double-sided disc, a large capacity of, for example, up to about 17 GB can be realized.
  • the reproduction limit area 150 is arranged on the pickup side, that is, the lower first layer, and the reproduction-only area is arranged on the upper second layer. 160 are formed.
  • a reproduction-only area 160 is formed on the inner circumference side, and a reproduction count limiting area 150 is formed on the outer circumference side.
  • a reproduction count limited area 150 is formed on the inner circumference side, and a reproduction-only area 160 is formed on the outer circumference side.
  • the reproduction-only area 160 is formed on the innermost circumference side, and the reproduction number limitation area 150 and the reproduction-only area 160 are alternately arranged toward the outer circumference side. It is formed into
  • the reproduction number limitation area 150 is formed on the innermost side, and the reproduction-only area 160 and the reproduction number restriction area 150 are formed toward the outer side. Formed alternately.
  • the twelfth to seventeenth embodiments are examples in which the above-described eighth to eleventh embodiments are further classified.
  • FIG. 9 is a schematic enlarged perspective view of a part of the optical disc 100 according to the twelfth embodiment of the present invention as viewed from the recording surface side of the optical disc 100.
  • the twelfth embodiment corresponds to the eighth to eleventh embodiments described above.
  • the optical disc 100 includes a substrate 32, a recording layer 30, a reflective layer 31, and a protective layer 33 laminated on the substrate 32. It is configured .
  • a dielectric layer or the like may be disposed above or below the recording layer 30, or a cover substrate or the like may be attached below the protective layer 33 including an adhesive layer.
  • a cover substrate or the like may be attached below the protective layer 33 including an adhesive layer.
  • a gnolev track G and a land track L are formed by embossing or the like.
  • An embossed pit EP and an embossed space ES are formed on the groove track G in the readable embossed area EA by embossing.
  • a recording mark 20 is formed on the recording layer 30 on the groove track G in the reproduction frequency limitation area.
  • the recording mark 20 is configured as a pit due to a phase change (a pit blackened by the phase change) by irradiating a recording laser.
  • the reflection layer 31 is, for example, an A1 (aluminum) film or the like formed directly or via a dielectric layer or an insulating film (not shown) on the recording layer 30 formed on the embossed substrate 32.
  • the optical disc 100 is configured as a kind of phase change type disc having the recording layer 30 with respect to the reproduction count restriction area 150.
  • the recording mark 20 is formed in a part of the recording layer 30, data is recorded so as to be erasable together with reproduction. More specifically, the recording layer 30 in a crystalline state having a high reflectivity is irradiated with a laser beam, whereby the recording layer 30 is partially melted and rapidly cooled. As a result, the recording layer 30 is partially turned into an amorphous state, whereby the reflectance can be reduced.
  • the recording mark 20 is formed on a part of the recording layer 30 in the amorphous state as described above.
  • the recording layer 30 in the amorphous state is irradiated with a laser beam, whereby the recording layer 30 is partially melted and slowly cooled. As a result, the recording layer 30 is returned to the crystalline state, so that the reflectance can be largely returned. That is, data can be erased.
  • the optical disc 100 has a readable emboss area EA, and is configured as a kind of ROM type disc provided with embossed pits EP irrespective of the existence of the recording layer 30. More specifically, a groove track G is formed on the polycarbonate substrate 32 as a guide track for guiding a beam such as a laser beam.
  • the area between the adjacent groove tracks G on the substrate 32 is referred to as a land track L.
  • the names of the groove track G and the land track L are such that, when viewed from the substrate 32 as a base, the concave portion is called a gnoreve track G and the convex portion is called a land track L. That is, when viewed from the optical pickup side, the group (groove) corresponds to the convex portion, and the land (hill) corresponds to the concave portion.
  • the optical disc 100 is configured as a kind of phase-change type disc with respect to the number-of-reproduction-times limiting area 150, and is connected to a readable emboss area EA which is an example of a read-only area. It is configured as a type of disk, and is configured as a hybrid type disk as a whole.
  • the readable emboss area EA is also formed on the same recording layer 30 as the reproduction count restriction area 150 and the same recording film as the reproduction count restriction area 150 is deposited. Is also good. If the recording layer 30 formed in the readable emboss area EA is not recorded by phase change as described above, the presence of the recording layer 30 will not adversely affect the reproduction of the embossed pit EP. What? Conversely, if the recording layer 30 is to be formed also in the readable emboss area EA as described above, the recording layer 30 may be formed over the entire surface of the substrate 32, and the subsequent partial removal of the recording layer 30 or Since there is no need to perform peeling, etc., it is convenient in manufacturing. Even in this case, at the time of reproduction, since the mode is equivalent to the erasing mode with a constant light amount, the recording mark 20 is not formed and there is no problem.
  • the groove track G is preferably wobble at a frequency corresponding to the rotation speed of the disc.
  • the wobbled gnolev track G is formed in advance before the optical disc 100 is shipped, similarly to the land prepit described later. Then, when recording information, that is, information such as image information to be originally recorded other than the pre-information, is recorded on the optical disc 100, the information recording / reproducing apparatus to be described later is used for recording the groove track G in the groove track G.
  • the rotation of the optical disc 100 at a predetermined rotation speed by extracting the clock frequency.
  • land prepits (not shown) corresponding to pre-information may be formed in the land track L.
  • the land pre-pits are generally formed before the optical disc 100 is shipped. Further, by detecting the land pre-pits, pre-information is obtained in advance, and based on the pre-information, an optimum output of laser light as recording light is set, and a position on the optical disc 100 where the recording information is to be recorded is set. Is obtained, and the recording information is recorded at the corresponding recording position based on the address information.
  • FIG. 10 is a diagram showing the relationship between the external top view of a part of the recording area of the optical disc according to the thirteenth embodiment of the present invention viewed from the recording surface side of the optical disc and the corresponding RF reproduction signal output.
  • FIG. The upper side of the external top view indicates the inner peripheral side of the optical disk, and the arrow indicates the traveling direction of the laser beam (that is, the tangential direction of the track).
  • the optical disc according to the thirteenth embodiment includes an unreadable emboss pit UP in addition to the components of the twelfth embodiment.
  • the unreadable emboss pit UP is an emboss pit formed for the purpose of generating a recording clock signal together with a land pre-pit (not shown). No information is recorded in the unreadable emboss pit UP, and it is not necessary to read out the information. Therefore, the unreadable emboss pit UP is formed of, for example, emboss pits having small irregularities. Further, the unreadable emboss pit UP may be formed on the gnolev track G similarly to the emboss pit in the twelfth embodiment.
  • an unreadable double-ended structure that constitutes another example of the read-only area according to the present invention is provided on the gnolev track G.
  • the boss pit UP is arranged on the inner circumference side, and subsequently, the recording mark 20 which constitutes an example of the reproduction frequency limitation area is arranged on the outer circumference side.
  • the thirteenth embodiment corresponds to the eighth embodiment (see FIG. 8 (c)) and the tenth embodiment (see FIG. 8 (e)).
  • the reproduction laser is irradiated, and as the laser beam proceeds in the direction of the arrow, the unreadable emboss pit UP and the recording mark 20 are irradiated with this laser beam. .
  • the RF reproduction signal is output low on the unreadable emboss pit UP and the recording mark 20 because the reflectance is small.
  • FIG. 11 shows the relationship between the external appearance top view of a part of the recording area of the optical disc according to the fourteenth embodiment of the present invention viewed from the recording surface side of the optical disc and the corresponding RF reproduction signal output. It is a schematic correlation diagram.
  • the upper side of the external top view indicates the inner peripheral side of the optical disk, and the arrow indicates the traveling direction of the laser beam (that is, the tangential direction of the track).
  • the optical disc according to the fourteenth embodiment is the same as the components of the twelfth embodiment.
  • embossed pits EP constituting an example of the read-only area according to the present invention were arranged on the inner peripheral side on the gnolev track G.
  • the fourteenth embodiment corresponds to the eighth embodiment (see FIG. 8C) and the tenth embodiment (see FIG. 8E).
  • the reproduction laser is irradiated, and the laser light is irradiated onto the embossed pits EP and the recording marks 20 as the laser light advances in the direction of the arrow.
  • the RF reproduction signal is output low on the even boss pit EP and the recording mark 20 because the reflectance is low.
  • FIG. 12 shows a part of the recording area of the optical disc 100 according to the fifteenth embodiment of the present invention.
  • FIG. 4 is a schematic correlation diagram showing a relationship between an external top view seen from the recording surface side of the disc 100 and a corresponding RF reproduction signal output.
  • the upper side of the external top view indicates the inner peripheral side of the optical disk, and the arrow indicates the traveling direction of the laser beam (that is, the tangential direction of the track).
  • the optical disc according to the fifteenth embodiment is the same as the components of the twelfth embodiment.
  • the embossed pits EP constituting an example of the read-only area according to the present invention are located on the inner peripheral side.
  • the recording mark 20 which is arranged and subsequently constitutes an example of the number-of-reproductions-limited area is arranged on the outer peripheral side.
  • the fifteenth embodiment corresponds to the eighth embodiment (see FIG. 8 (c)) and the tenth embodiment (see FIG. 8 (e)).
  • the laser beam for reproduction is irradiated, and the laser beam is irradiated on the embossed pit EP and the recording mark 20 as the laser beam proceeds in the direction of the arrow.
  • the RF reproduction signal is output low on the en-boss pit EP and the recording mark 20 because the reflectance is small.
  • FIG. 13 is a schematic enlarged perspective view of a part of the optical disc 100 according to the sixteenth embodiment of the present invention viewed from the recording surface side of the optical disc 100.
  • the sixteenth embodiment corresponds to the eighth to eleventh embodiments described above.
  • the optical disc 100 has a configuration in which the hologram track G and the land track L are removed from the twelfth embodiment.
  • the optical disc 100 is a phase-change type optical disc having a recording layer 30 in the same manner as in the twelfth embodiment with respect to the limited number of times of reproduction.
  • FIG. 14 is a diagram showing a relationship between an external top view of a part of the recording area of the optical disc according to the seventeenth embodiment of the present invention viewed from the recording surface side of the optical disc and the corresponding RF reproduction signal output.
  • FIG. The upper side of the external top view indicates the inner peripheral side of the optical disk, and the arrow indicates the traveling direction of the laser beam (that is, the tangential direction of the track).
  • the optical disc according to the seventeenth embodiment is the same as the components of the sixteenth embodiment.
  • the embossed pits EP were formed in the read-only area on the land level, that is, on the track corresponding to the land track L.
  • the recording mark 20 is arranged first in the direction, and subsequently, the recording mark 20 is arranged in the reproduction frequency limitation area at the same land level.
  • the emboss pits EP and the recording marks may be arranged on the track corresponding to the gnore level, that is, the groove track G instead of the land level.
  • the seventeenth embodiment corresponds to the eighth embodiment (see FIG. 8C) and the tenth embodiment (see FIG. 8E).
  • the reproduction laser is irradiated, and the laser light is irradiated onto the embossed pits EP and the recording marks 20 as the laser light advances in the direction of the arrow.
  • the RF reproduction signal is output low on the embossed EP and the recording mark 20 due to the low reflectance.
  • FIG. 15 is a block diagram showing the overall configuration of the information reproducing device 200 of the optical disc 100 according to the embodiment of the present invention.
  • the information reproducing apparatus 200 includes an optical disk 100, an optical pickup 202, a spin-drain motor 203, a head amplifier 204, a sum generation circuit 210, a pit data demodulation circuit 211, and pit data correction. It comprises a circuit 212, a buffer 213, an interface 214, a push-pull signal generation circuit 220, a single pass filter 221 and a servo unit 222.
  • the optical disc 100 On the optical disc 100, pit data DP synchronized with the first clock signal CK1 is recorded according to the length of the recording mark 20.
  • the first clock signal CK1 of the RF reproduction signal component is, as described in the above-described various embodiments of the optical disk 100, the RF reproduction signal component of the optical disk 100 that fluctuates at a substantially constant cycle in accordance with wobbling or unreadable embossing. Therefore, the signal is a signal that can be generated by the information reproducing apparatus 200, and is generated by the pit data demodulation circuit 211 in the present embodiment.
  • the recording mark 20 can be interpreted as a pit, and the track is constituted by this pit row.
  • the information reproducing apparatus 200 includes an optical pickup 202 that irradiates the optical disc 100 with a reproducing beam and outputs a signal corresponding to reflected light, and a spindle motor 203 that controls the rotation of the optical disc 100. And a servo unit 222.
  • the first clock signal CK1 and the pit synchronization signal SYNCp are supplied to the servo unit 222.
  • the servo unit 222 executes a spindle servo for controlling the rotation of the spindle motor 203 and a focus servo and a tracking servo for controlling the relative position of the optical pickup 202 with respect to the optical disc 100 in synchronization with these signals.
  • the optical pickup 202 includes a laser diode for irradiating a reproduction beam and a four-division detection circuit (not shown).
  • the quadrant detection circuit divides the reflected light of the reproduction beam into four areas 1A, 1B, 1C, and ID shown in the upper part of FIG. 15, and outputs a signal corresponding to the light amount of each area.
  • the head amplifier 204 amplifies each output signal of the optical pickup 202, and outputs the divided read signal la corresponding to the area 1A, the divided read signal lb corresponding to the area IB, the divided read signal lc corresponding to the area 1C, and the area. Outputs divided read signal Id corresponding to ID.
  • the sum generation circuit 210 includes an addition circuit that adds the divided read signals la, lb, lc, and Id and outputs a sum read signal SRF.
  • the total reading signal SRF is a signal indicating the length of the recording mark.
  • the pit data demodulation circuit 211 reproduces the pit data DP based on the total read signal SRF and generates the first clock signal CK1. More specifically, the pit data demodulation circuit 211 stores the reproduced pit data DP with the pit synchronization signal SYNCp as a reference position. Demodulation is performed using a fixed table to generate reproduction data. For example, when EFM modulation is adopted as a modulation method, a process of converting 14-bit pit data DP into 8-bit reproduction data is performed. Then, a descrambling process for rearranging the order of the reproduction data according to a predetermined rule is executed, and the processed reproduction data is output.
  • the reproduced data thus obtained is supplied to the pit data correction circuit 212, where it is subjected to error correction processing, interpolation processing and the like, and then stored in the buffer 213.
  • the interface 214 sequentially reads the data stored in the buffer 213, converts the data into a predetermined output format, and outputs it to an external device.
  • the push-pull signal generation circuit 220 calculates (la + ld) _ (lb + lc) and generates a push-pull signal.
  • the component (la + ld) corresponds to the areas 1A and 1D on the left side in the reading direction, while the component (lb + lc) corresponds to the areas 1B and 1C on the right side in the reading direction.
  • the value of the push-pull signal indicates the relative positional relationship between the reproduction beam and the pit.
  • the push-pull signal is output to the servo unit 222 via the low-pass filter 221.
  • the servo unit 222 performs tracking control based on the push pull signal.
  • FIG. 16 is a flowchart showing a reproducing operation of the optical disc according to the first embodiment of the present invention.
  • step S101 when the information reproducing apparatus enters the play mode, the type of an optical disc such as a CD, DVD-Video, DVD-ROM, DVD-R or DVD-RW is determined (step S101).
  • the optical disk according to the first embodiment of the present invention in the DVD format (video) is inserted.
  • step S102 it is determined whether or not it is possible to recognize the recorded information or the like.
  • step S102 if it is possible to recognize the recorded information, etc. (step S102: Yes), Is read, and basic information necessary for the reproducing operation is read (step S103).
  • step S104 it is determined whether the control data has been successfully read. If the control data has been successfully read (step S104: Yes), the file system is read (step S105).
  • step S106 it is determined whether the reading of the file system has been successful. If the reading of the file system is successful (step S106: Yes), for example, the parent menu recorded in the parent menu file recording area is read (step S107). For example, content is played via a parent menu. This content is looped in the parent menu and can be played any number of times. The reproduction operation ends after the parent menu ends.
  • step S102 determines whether the result of determination in step S102 is that it is not possible to recognize recorded information, etc.
  • Step S102: No as a result of the judgment in Step S104, when the control data reading fails (Step S104: No) and when the file system reading fails (Step S106: No), the information reproducing device is used.
  • the reproduction operation ends. That is, if the number of reproductions limited by the provider of the optical disc 100, such as once or multiple times, has already been reproduced, the pits due to the phase change that is in the file management information recording area as the reproduction number restriction area and can be erased. The file system, etc., which has been recorded as, has already been deleted. For this reason, in the determination of step S105, the reading is determined to be impossible (step S105: No).
  • FIG. 17 is a flowchart showing a reproducing operation of the optical disc according to the fifth embodiment of the present invention.
  • step S101 and step S106 shown in Fig. 16 are performed.
  • step S106: Yes when the reading of the file system is successful (step S106: Yes), the parent menu subroutine is executed (step S107).
  • the parent menu is displayed.
  • a number menu is displayed for selection (step S201).
  • step S202 it is determined whether a child menu has been selected.
  • step S203 it is determined whether or not the content corresponding to the parent menu is played.
  • step S203 when the content corresponding to the parent menu is played (step S203: Yes), the parent menu is read and the content corresponding to the parent menu is played (step S204).
  • the parent menu file recording area is configured as a reproduction count restriction area. Therefore, when the parent menu is read once or a plurality of times that is restricted, the parent menu is deleted, for example, to be deleted. Menu playback (step S204) is no longer possible.
  • Step S205 it is determined whether the parent menu is terminated by the user.
  • Step S205 Yes
  • the parent menu subroutine is terminated.
  • step S202 when the child menu is selected as a result of the determination in step S202 (step S202:
  • the child menu file recording area in which the child menu is recorded is configured as a reproduction-only area, the child menu can be reproduced (step S206) any number of times.
  • step S203 if the content corresponding to the parent menu is not played (step S203: No), it is determined whether or not the user ends the parent menu (step S205).
  • step S205 determines whether the parent menu has been terminated by the user. If the result of determination in step S205 is that the parent menu has not been terminated by the user (step S205: No), the process returns to step S201, where the parent menu is displayed. Child menu is displayed for selection. However, when the content corresponding to the parent menu is played in the following step S203 (step S203: Yes), the parent menu recorded in the parent menu file recording area is read once or restricted plural times before. The content corresponding to the parent menu is not played because it has been deleted.
  • an optical disc with a limited number of times of reproduction is an example of an information recording medium
  • a record of an optical disk with a limited number of times of reproduction is an example of an information reproducing apparatus.
  • the present invention has been described with respect to a recorder or a player, the present invention relates to an optical disk having such a limited number of times of reproduction and various information recording media compatible with a high-density recording or a high transfer rate, which are not limited to the recorder or the player. It is also applicable to the recorder or player.
  • the information recording medium according to the present invention can be used as an information recording medium such as an optical disk that can be recorded and reproduced by irradiating a laser, for example.
  • FIG. 1 shows a basic structure of an optical disc which is an embodiment of an information recording medium according to the present invention, and an upper portion is a schematic plan view of an optical disc having a plurality of recording areas, and is associated with this.
  • the lower part is a schematic conceptual diagram of the recording area structure in the radial direction.
  • FIG. 2 is a graph showing a reproduction power range, an erasure power range, and a recording power range in the optical disc according to the embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram showing a structure of a recording area, a read-only area, and a reproduction count restriction area of the optical disc according to the first embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram showing a structure of a recording area, a read-only area, and a reproduction count limiting area of an optical disc according to a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram showing a structure of a recording area, a read-only area, and a reproduction count limiting area of an optical disc according to a third embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram showing a structure of a recording area, a read-only area, and a reproduction count limiting area of an optical disc according to a fourth embodiment of the present invention.
  • FIG. 7 is a schematic structural view showing a structure of a recording area, a read-only area, and a reproduction count limiting area of an optical disc according to a fifth embodiment of the present invention.
  • FIG. 8 is a schematic sectional view showing a physical structure of an optical disc according to sixth to eleventh embodiments of the present invention.
  • FIG. 9 is a schematic enlarged perspective view of a part of an optical disc according to a twelfth embodiment of the present invention, as viewed from the recording surface side of the optical disc.
  • FIG. 11 is a schematic correlation diagram showing a relationship between an external top view of a part of an optical disc according to a fourteenth embodiment of the present invention viewed from the recording surface side of the optical disc and a corresponding RF reproduction signal.
  • FIG. 12 is a schematic correlation diagram showing a relationship between an external top view of a part of an optical disc according to a fifteenth embodiment of the present invention as viewed from the recording surface side of the optical disc and a corresponding RF reproduction signal.
  • FIG. 13 is a schematic enlarged perspective view of a part of an optical disc according to a sixteenth embodiment of the present invention, viewed from the recording surface side of the optical disc.
  • FIG. 15 is a block diagram showing an overall configuration of an optical disc information reproducing apparatus according to an embodiment of the present invention.
  • FIG. 16 is a flowchart showing a reproduction operation of the optical disc according to the first embodiment of the present invention.
  • FIG. 17 is a flowchart showing a reproduction operation of the optical disc according to the fifth embodiment of the present invention.
  • Encryption key recording area Encrypted data area Address information recording area Parent menu file recording area Child menu file recording area Play count limit area

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

L'invention concerne, d'une part, une zone réservée de reproduction (160), dans laquelle des premières informations d'enregistrement ont été enregistrées à l'avance et, d'autre part, une zone limitée du nombre de fois de la reproduction (150), dans laquelle des secondes informations d'enregistrement ont été enregistrées, la reproduction de ces secondes informations étant possible en fonction des opérations de reproduction.
PCT/JP2004/012639 2003-09-05 2004-09-01 Support d'enregistrement d'informations WO2005024805A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007115372A (ja) * 2005-10-24 2007-05-10 Toshiba Corp 光ディスク
JP2011170907A (ja) * 2010-02-16 2011-09-01 Sharp Corp 光ディスク、光ディスク装置、コンテンツ再生システム及びコンテンツ再生方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11312363A (ja) * 1998-04-28 1999-11-09 Sony Corp 光記録媒体および光記録装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11312363A (ja) * 1998-04-28 1999-11-09 Sony Corp 光記録媒体および光記録装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007115372A (ja) * 2005-10-24 2007-05-10 Toshiba Corp 光ディスク
JP2011170907A (ja) * 2010-02-16 2011-09-01 Sharp Corp 光ディスク、光ディスク装置、コンテンツ再生システム及びコンテンツ再生方法

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