WO2005109431A1 - 情報記録媒体、情報記録装置及び方法、並びにコンピュータプログラム - Google Patents
情報記録媒体、情報記録装置及び方法、並びにコンピュータプログラム Download PDFInfo
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- WO2005109431A1 WO2005109431A1 PCT/JP2005/008443 JP2005008443W WO2005109431A1 WO 2005109431 A1 WO2005109431 A1 WO 2005109431A1 JP 2005008443 W JP2005008443 W JP 2005008443W WO 2005109431 A1 WO2005109431 A1 WO 2005109431A1
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- recording
- information
- area
- recording area
- recorded
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Classifications
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- 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
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
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- 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
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
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- 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
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00681—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access
- G11B20/00695—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access said measures preventing that data are read from the recording medium
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- 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
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
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- 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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/211—Discs having both read-only and rewritable or recordable areas containing application data; Partial ROM media
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/218—Write-once discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/23—Disc-shaped record carriers characterised in that the disc has a specific layer structure
- G11B2220/235—Multilayer discs, i.e. multiple recording layers accessed from the same side
- G11B2220/237—Multilayer discs, i.e. multiple recording layers accessed from the same side having exactly two recording layers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
Definitions
- Information recording medium information recording apparatus and method, and computer program
- the present invention relates to a technical field of an information recording medium such as a DVD, an information recording apparatus and method such as a DVD recorder, and a computer program.
- Information recording media such as CDs (Compact Discs) and DVDs have a built-in content protection function.
- the DVD format is configured so that information on the encryption key is written in the lead-in area, so that the recorded content can be played only by a playback device that can restore the encryption.
- the DVD video and the DVD playback device each have a “key” to decrypt the data, and the scramble is released only when the keys match, so that the video can be played back normally. ing.
- DVDs that can be written only once such as DVD-R (Recordable) and DVD-RWs that can be written repeatedly (DVD-Video, for example), which only record such contents, are used.
- Rewritable is commercially available. For this reason, if the entire disc data including the encryption key information is read from a DVD-Video or the like as an RF signal and hard-copyed to another recording medium such as a DVD-R or DVD-RW, the original DVD cannot be copied. Content is copied illegally.
- Patent Document 1 discloses an area where writable DVD such as DVD-RW or the like, in which encryption key information is recorded when copying DVD-Video or the like, is recorded.
- a technique has been disclosed in which embossing is performed so that overwriting cannot be performed in advance. According to this method, since the information is copied without the encryption key information, it is extremely difficult to decrypt the encrypted information and reproduce it normally.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-331412
- the present invention has been made in consideration of, for example, the above-described problems, and has as its object to provide an information recording medium, an information recording apparatus, a method, and a computer program that can more securely protect contents. I do. Means for solving the problem
- the information recording medium of the present invention includes a user information recording area in which user information can be recorded, and the user information recording area has a pre-recording area that prevents recording and reproduction of the user information.
- Each of the plurality of partial recording areas is divided into a plurality of partial recording areas including a partial recording area smaller than a unit area where recording information is recorded in the read-only recording medium by the pre-recording area.
- the information recording medium of the present invention when the recording information of the read-only recording medium is copied to the user information recording area, the writing to the pre-recording area is prohibited or restricted. . Therefore, the copied recording information is in a state where information to be written is missing in the pre-recording area or a state where irrelevant information is written instead of information to be written, and the pre-recording area causes the partial recording area to change. Each is physically separated.
- the information recorded on the read-only recording medium has a single estate, that is, a data structure in which files are physically continuous and the next file to be reproduced is specified by a relative address.
- the pre-recording area functions to prevent recording and reproduction of the user information in the user information recording area.
- the recording data for each unit area is divided on the way by the pre-recording area. . If the entire data of one unit area is one If the file is completely copied in the partial recording area, it is possible that at least the file can be normally reproduced. However, in the present invention, such a situation can be prevented beforehand for the above-mentioned reason. .
- the user information recording area can be freely written by the user in portions other than the pre-recording area, it is possible to guarantee the standard value of the user data capacity. If the information is not recorded in the normal writing method, the information can be recorded without greatly changing the normal writing method. It should be noted that for this information recording medium, if the data file is in a multi-extent format in which the existence of a divided area is allowed, normal reproduction is possible after writing.
- the content recorded on the read-only recording medium is protected while maintaining compatibility. It is possible.
- a minimum size of the plurality of partial recording areas is smaller than a maximum file size defined by a file system that manages recording information of the read-only recording medium.
- the size of at least one partial recording area is smaller than the file size defined by the file system that manages the recording information of the read-only recording medium, At least a part of the file data of the recording information cannot be completely contained in the partial recording area when copied to the user information recording area, and is always partially lost due to the pre-recording area.
- the minimum size of the plurality of partial record area is less than 2 3 bytes.
- embossed pits are preliminarily formed in each of the pre-recording areas.
- the pre-recording area cannot be overwritten by forming emboss pits in the area in advance. Therefore, it is possible to prevent the reproduction control information of the recording information copied from the reproduction-only recording medium from being written on the information recording medium.
- prepits are previously formed in each of the prerecording areas by irradiation of a recording laser.
- pre-pits are written by, for example, an irreversible change recording method or a destructive writing method by heating by irradiating a laser beam.
- the pre-recording area is a data area.
- the pre-recording area belongs to the data area, and more specifically, the writing is prevented as described above by previously writing as emboss pits or pre-pits.
- the “data area” here is an area where data corresponding to the content to be recorded is recorded, and the “user information recording area” in the present invention also belongs to the data area.
- the pre-recording area functions to prevent writing, although it is part of the data area where data should be written.
- At least one of the pre-recording area and the area outside the user information recording area includes a reproduction period of the pre-recording area and a period before the reproduction period. Operation to invalidate an operation instruction for the partial recording area Prohibition information is written in advance.
- the operation instruction to the user information recording area in the reproduction period of the pre-recording area and the period before that is based on the operation prohibition information Invalidated.
- the operation prohibition information is written in advance so as to be read before or during the above period, such a situation is prevented.
- reproduction end information for jumping to a predetermined reproduction end area to end reproduction of information recorded in the user information recording area Is written.
- the read-out is performed based on the reproduction end information.
- the reproduction jumps to a predetermined reproduction end area such as an area, and the reproduction of the user information recording area is ended.
- information indicating an address of the pre-recording area is recorded in advance.
- the "information indicating the address of the pre-recording area” may be each address of the pre-recording area itself, or may be the interval size of the pre-recording area. Further, it may be each address of the partial recording area which is on the front and back of the pre-recording area, the interval size, or the like. Data representing such information is stored in the lead-in area, etc. As a pre-pit or emboss pit by the irradiation, or is written in advance by land pre-pit (LPP: Land PrePit), pebble modulation or the like.
- LPP Land PrePit
- the information indicating the address of the pre-recording area may be encrypted.
- each address of the pre-recording area can be notified only to a specific user. Therefore, since the address of the pre-recording area, which is indispensable when writing information in a normally reproducible manner, is concealed, it is possible to more reliably prevent copying by a read-only recording medium or the like. In this case, it is desirable that the encrypted key is stored in a portion different from the encrypted address information.
- each of the recording areas constituting a part of the user information recording area is formed, and the recording area includes a plurality of recording layers stacked on each other.
- the pre-recording area is arranged at a position facing each of the plurality of recording layers.
- the pre-recording area is arranged at an opposing position in each recording layer, writing can be executed in the same sequence on any recording layer, which is convenient.
- the pre-recording area in the recording layer to be recorded first among the plurality of recording layers is Alternatively, the pre-recording area may be configured to be larger than the pre-recording area in the recording layer to be recorded later, by an amount capable of absorbing an error relating to a relative displacement.
- pre-pits can be correctly written in the pre-recording area sequentially, such as recording on the LO layer and later recording on the L1 layer. That is, for example, even if there is a displacement, when writing to the recording layer on the back side, always seeing from the laser irradiation side, writing is performed by laser irradiation through the portion where writing to the recording layer on the front side has been completed. Can be performed.
- the information recording apparatus of the present invention includes a user information recording area in which user information can be recorded, and the user information recording area includes a plurality of pre-recording areas that prevent recording and reproduction of the user information.
- the information recording medium is divided into a plurality of partial recording areas including a partial recording area smaller than a unit area where recording information is recorded on the read-only recording medium by the pre-recording area.
- An information recording apparatus for recording information to be recorded comprising: a writing unit capable of writing the user information in the user information recording area; and a pre-recording area in the user information recording area. And control means for controlling the writing means so as to write data in an area excluding.
- the information recording apparatus of the present invention it is possible to appropriately record information on the information recording medium of the present invention.
- the area excluding the pre-recording area is a substantial recordable area, that is, an area where the user can freely write.
- the writing means is controlled by the control means so as to write only in the user information recording area excluding the pre-recording area.
- the control means performs control based on information representing each address of the pre-recording area.
- the information indicating each address of the pre-recording area is known or fixed according to a standard or the like, and if necessary, is stored in advance in the control means, or may be read from the information recording medium.
- the information recording medium includes the pre-recording area.
- the information recording apparatus further includes reading means for reading information representing each address of the pre-recording area, and the control means reads out the information representing the respective addresses of the pre-recording area.
- the writing means is controlled so as to write the user information to an area of the user information recording area other than the pre-recording area based on the obtained information.
- the information indicating each address of the pre-recording area is recorded on the information recording medium, is read out when writing to this information recording medium, and is written while avoiding the pre-recording area. Used for In this way, if the address information on the pre-recording area is held in the information recording medium itself, the address information can be obtained and used for each information recording medium, and the address information is stored in the information recording medium. Even if it differs depending on the type, etc., it is possible to obtain the correct information.
- control means sets the information to be recorded to have a file size less than or equal to a size of a partial recording area to be written among the plurality of partial recording areas.
- the writing unit is divided into individual files, and the writing means is controlled so that the individual files are written in the respective partial recording areas to be written.
- the information to be recorded is divided into several files and written in the partial recording area in file units.
- the size of each of these files is smaller than the size of the partial recording area to be written. For this reason, writing of a portion that cannot be completely accommodated in the partial recording area is performed on the pre-recording area, and as a result, a situation where data is partially lost is prevented. Therefore, the write operation can be properly performed.
- control means does not affect the reproduction of the information to be recorded in each part corresponding to the pre-recording area in the information to be recorded.
- the data is inserted into one file, and the writing means is controlled so as to write the file into the user information recording area.
- a data file in which extra data is inserted in a portion corresponding to the pre-recording area is created, and this data file is written to the user information recording area.
- the extra data inserted is prohibited or restricted and the data is lost.
- the information to be recorded is written in such a way as to avoid the pre-recording area by causing an interval in the portion corresponding to the pre-recording area due to the insertion of data. Therefore, the write operation can be properly performed.
- Data is inserted into a portion of the information to be recorded corresponding to the pre-recording area to create a file containing the information to be recorded, and to write the file continuously into the user information recording area.
- the control means further includes, in the file of the information to be recorded, only a portion excluding data not related to reproduction of the information to be recorded in the user information recording area. It is also possible to selectively write in the corresponding area.
- the information recording method of the present invention includes a user information recording area in which user information can be recorded, and the user information recording area includes a plurality of pre-recording areas that prevent recording and reproduction of the user information.
- the information recording medium is divided into a plurality of partial recording areas including a partial recording area smaller than a unit area where recording information is recorded on the read-only recording medium by the pre-recording area.
- An information recording method for recording information to be recorded comprising a writing step of writing the user information in an area of the user information recording area other than the pre-recording area.
- the information recording method of the present invention has the same functions and effects as the above-described information recording apparatus of the present invention.
- the present invention can appropriately adopt the same aspects as the various aspects of the information recording apparatus of the present invention described above.
- a computer program of the present invention is a computer program for controlling a computer provided in an information recording device of the present invention, wherein the computer program is provided by at least one of the control unit and the writing unit. Function as a part.
- the computer program is read from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program, and is executed by the computer.
- a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program.
- the information recording apparatus of the present invention described above can be realized relatively easily by causing a computer program to be downloaded to a computer via, for example, communication means and executed.
- a computer program product in a computer-readable medium is capable of executing a program instruction executable by a computer provided in an information recording apparatus (including various aspects thereof) of the present invention. And the computer functions as at least a part of the control unit and the writing unit.
- the computer program product can be read into a computer from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program product, or
- a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program product
- the computer program product which is a transmission wave
- the computer program product includes computer-readable codes (or computer-readable instructions) that function as at least a part of the control unit and the writing unit of the present invention described above. May be.
- the user information recording area is divided into a plurality of partial recording areas by the pre-recording area. It is possible to protect the content recorded on the recording medium.
- the writing unit and the control unit are provided, it is possible to appropriately record information on the information recording medium of the present invention.
- the writing step is included, it is possible to appropriately record information on the information recording medium of the present invention.
- the computer since the computer functions as the above-described information recording device of the present invention, it is possible to appropriately record information on the information recording medium of the present invention.
- FIG. 1 A schematic plan view (a) showing a basic structure of an optical disc as an information recording medium according to an embodiment of the present invention, and a schematic cross-sectional view of the optical disc,
- FIG. 4B is a schematic conceptual diagram (b) of a recording area structure in a radial direction.
- FIG. 2 is a conceptual configuration diagram (upper diagram) showing a data structure of an optical disc according to an embodiment of the present invention, and a conceptual configuration diagram (lower diagram) showing a data structure of a ROM disc corresponding to the optical disc.
- FIG. 3 is a conceptual diagram (upper diagram) showing a data reading procedure in an optical disc according to an embodiment of the present invention, and a conceptual diagram (lower diagram) showing a data reading procedure in a ROM disc corresponding to the optical disc.
- FIG. 4 is a flowchart showing a procedure for reproducing a legitimate content on a ROM disk according to an embodiment of the present invention.
- FIG. 5 is a flowchart showing a procedure of an operation of reproducing content copied to an optical disc according to an embodiment of the present invention.
- FIG. 6 is a block diagram showing a configuration of a recording / reproducing device as an information recording device according to an embodiment of the present invention.
- FIG. 7 is a flowchart showing a recording operation procedure for an optical disc by the recording / reproducing apparatus according to the embodiment of the present invention.
- FIG. 8 is a conceptual diagram showing a procedure for writing data to an optical disk by the recording / reproducing apparatus according to the embodiment of the present invention.
- FIG. 9 is a conceptual diagram (a) showing a procedure for writing data to an optical disk and a conceptual diagram (b) showing a corresponding write operation in a modification according to the embodiment of the present invention.
- FIG. 1 (a) shows a basic structure of an optical disc having a plurality of recording areas according to an embodiment of the information recording medium of the present invention
- FIG. 1 (b) shows a schematic cross section of the optical disc and corresponding sections. The attached recording area structure in the radial direction is shown.
- the optical disc 100 is an information recording medium that can be recorded once or repeatedly, such as a DVD-R or a DVD-RW.
- a disk body having a diameter of about 12 cm is configured by laminating the recording layers L0 and L1 layers on a transparent substrate 106.
- a track 10 such as a groove track or a land track is provided spirally or concentrically with the center hole 1 as a center.
- the user data area 102 which is an example of the “user information recording area” in the present invention, is set so that the outer peripheral side and the inner peripheral side are sandwiched between buffer areas.
- the buffer area is an area for preventing the recording or reproduction position from being out of the substrate, and here refers to a lead-in area 101, a lead-out area 103, and a middle area 104. That is, the recording surface of the L0 layer is also divided into a lead-in area 101, a user data area 102, and a middle area 104 with respect to the inner peripheral side force.
- the recording surface of the L1 layer is divided into a read-out area 103, a user data area 102, and a middle area 104 from the inner peripheral side. In each of these areas, data is partitioned for each sector to which an address is assigned, and one ECC (Error Correcting Code) block.
- ECC Error Correcting Code
- Such a two-layer type optical disc 100 in FIG. 1B, depending on whether the focusing position of the laser beam LB irradiated from the transparent substrate 106 side is set to the L0 layer or the L1 layer. Recording and reproduction can be performed by selecting one of the recording layers. Further, here, as a recording or reproducing procedure of the two-layer type optical disc 100, from the inner peripheral side of the L0 layer to the outer peripheral side (that is, from the lead-in area 101 to the middle area 104), and further from the outer peripheral side of the L1 layer. The opposite method is adopted in which recording or reproduction is performed in the direction toward the inner circumference (that is, from the middle area 104 to the lead-out area 103).
- the lead-in area 101 is an area that is first accessed when recording or reproducing data on or from the optical disc 100, and includes a reference code area in which encryption key information used for scrambling is recorded, and various types of information. A control data area in which control information is recorded is set.
- the user data area 102 is an area for recording data corresponding to the content to be recorded.
- the data to be recorded includes, for example, image data and audio data, and program data that can be read by a computer.
- the pre-recording area 105 is arranged in each of a plurality of parts in the user data area 102, the user data area 102 is divided into a plurality of partial recording areas 102A. ing.
- the pre-recording area 105 is formed in advance as an area that cannot be overwritten by emboss pits when the optical disc 100 is a DVD-RW, or pre-pits or emboss pits by irradiation of a recording laser when the optical disc 100 is a DVD-R.
- Such a pre-recording area 105 is arranged at a position opposite to each of the L0 layer and the L1 layer.
- the width of the pre-recording area 105 in the L1 layer is smaller than that in the L0 layer by the eccentricity error between the recording layers and the bonding error.
- the lead-out area 103 is an area that follows the end of the recording or reproduction of the user data area 102, and records information indicating that the area is the lead-out area 103.
- the middle area 104 has a basic function of preventing the recording or reproduction position for the L0 layer and the L1 layer from deviating outside the substrate, but preventing the recording or reproduction position from deviating from the substrate during an interlayer jump. In other words, it functions as a "jump buffer area". Specifically, in the LO layer, information to be recorded such as contents is recorded, and subsequently, a predetermined amount of data for buffering is written in a part of the middle area 104 of the SLO layer.
- the middle area 104 force of the L0 layer is also written as a part of the middle area 104 of the L1 layer through the interlayer jump to the L1 layer and a predetermined amount of buffering data force, and should be recorded in the L1 layer. Information is recorded.
- FIG. 2 and 3 show the optical disc 100 according to the present embodiment on the upper side and the ROM disc 200 on the lower side in correspondence with each other.
- FIG. 2 shows the data structure of each recording medium. Incidentally, data having such a data structure is actually recorded after being divided into two layers as described with reference to FIG.
- FIG. 3 schematically shows a data reading procedure.
- FIG. 4 and FIG. 5 show a procedure of reproducing the normal content by the ROM disk 200 and the content copied to the optical disk 100, respectively.
- the optical disc 100 has almost the same basic structure as the read-only ROM (Read Only Memory) disc 200, so that compatibility is maintained. That is, the recording area of the ROM disc 200 is divided into a lead-in area 201, a user data area 102, and a lead-out area 103 corresponding to the lead-in area 101, the user data area 102, and the lead-out area 103 of the optical disc 100, respectively. I have.
- the recording area of the ROM disc 200 is divided into a lead-in area 201, a user data area 102, and a lead-out area 103 corresponding to the lead-in area 101, the user data area 102, and the lead-out area 103 of the optical disc 100, respectively. I have.
- the ROM disk 200 content data is recorded in the user data area 202 in advance.
- the file system FS is written in the first area 202a of the user data area 202, and the video reproduction control for each content is written in the last area 202c of the user data area 202.
- Information PB is written.
- the content data in the ROM disk 200 is described in UDF1.02 and a single extent, in which files must be physically continuous. Also, The address in the content is specified by a relative address, and the address information is included in the video playback control information PB. Furthermore, storage information such as where various data is recorded is managed by the file system FS.
- the ROM disk 200 is an example of the “read-only recording medium” according to the present invention.
- the user data area 102 of the optical disc 100 is divided by the pre-recording area 105 into a plurality of partial recording areas 102A.
- the occupied area of the entire pre-recording area 105 is suppressed to 9 MBytes or less. Therefore, the user data area 102 is rounded to 8.54 GBytes, that is, the size conforming to the standard.
- control information or the like that functions to prevent content reproduction is written in other areas such as the pre-recording area 105 and the lead-in area 101.
- the user data area 102 may be scanned and the content may be reproduced. Therefore, a flag is set in these areas, and control information for invalidating an operation instruction such as not accepting a key during the read operation period is set as an example of the “operation prohibition information” according to the present invention. Being done.
- the copy data of the user data area 202 is written into the user data area 102 from the area 102a with the file system FS at the beginning.
- the actual recording area of the user data area 102 is an individual partial recording area 102A, and the pre-recording area 105 cannot be physically written.
- the content of the ROM disc 200 on the optical disc 100 is completely separated from the data in the area corresponding to the pre-recording area 105 and divided into the partial recording areas 102A. It will be recorded only in the state.
- each partial recording area 102A Since the file size is smaller than the specified file size, the data copied to the partial recording area 102A is less than one file size.
- the reading operation on the optical disc 100 is performed as follows when the content is copied from the ROM disc 200.
- the ROM disk 200 is DVD-Video, and the playback device is configured to be able to play DVDs.
- This playback apparatus is configured in the same manner as a normal apparatus, and illustration and description thereof are omitted.
- the reproducing apparatus a recording / reproducing apparatus which is configured in the same manner as a recording / reproducing apparatus 300 (see FIG. 6) to be described later and is compatible with the ROM disk 200 is applied.
- step S 11 when the insertion of the ROM disk 200 is triggered, servo processing such as alignment of the focus of the optical pickup is performed (step S 11).
- various information is read from the lead-in area 201 of the ROM disk 200, and the type of the medium of the inserted disk is determined based on the information (step S12).
- the file system FS is continuously read from the area 202a and checked (step S13). At this time, the start address "A" of the entire content is obtained
- the file in the data area 202b which is the top of the user data area 202 shown in FIG. 4 and specified by the address “A”, Is loaded (step S14).
- the parameters stored in this file are checked (step S15), and the remote control control OFF state described later is determined (step S16).
- the content menu of the first file card is loaded (step S17). Are displayed on the playback device.
- the content to be played back on the playback device is determined according to the user's title selection and instruction (step S18).
- step S 19 data is reproduced from the start address “0” of the content to be reproduced (step S 19), and the navigation pack corresponding to the address “0” is read (step S 20). And navigation According to the read navigation information, the nottaka also jumps to the area represented by the address "Z" in the user data area 202 (step S21), and the data from the area 202c designated by the address "Z” is read. That is, the video reproduction control information PB is reproduced (step S22).
- step S23 the navigation pack corresponding to the address “Z” is read (step S23).
- step S24 After setting the variable N representing the address of the data to be reproduced to 1 (step S24), the process jumps to the area represented by the address "N (that is, 1)" in the user data area 202 (step S25). ).
- step S26 the remote control of variable N is turned on (step S26), and the data in the specified content is sequentially reproduced from address "1" next to address "0".
- step S27 data is reproduced from the address "N" (step S27), and if data reproduction in the content is not completed yet (step S28: No), 1 is added to the variable N (step S29), and the address " Jump to the area represented by "N” (step S30), and repeat the data reproduction from the address "N” until the data reproduction of the entire content ends (step S28: Yes).
- the addresses (0, 1,..., N) of the content data are relative addresses.
- the reproduction on the optical disk 100 on which the content data of the ROM disk 200 is dead-copied is performed on the reproducing apparatus in the procedure shown in FIGS. 3 and 5.
- the operation procedure of the reproducing apparatus is the same as that of the above-described reproduction of the ROM disk 200 until the content to be reproduced from the optical disk 100 is selected and designated. That is, the same processing as steps S11 to S18 shown in FIG. 4 is performed first.
- step S120 the data is reproduced from the start address “0” of the content to be reproduced (step S120), and the navigation pack corresponding to the address “0” is reproduced. Is read (step S121). Then, according to the read navigation information, an attempt is made to jump to the area represented by the address "Z" in the user data area 202.
- each file data is always divided on the way by the pre-recording area 105. They are not copied intact. That is, here, the data structure of the copied content is also broken in file units, and even some files cannot be normally reproduced!
- the force to be played back as usual up to the start address "A" of the entire content is to prevent it, for example, by setting the first pre-recording in the recording or playback direction.
- the recording area 105 should be located as close to the file system area as possible. In this case, if program data of an infinite loop is pre-written in the pre-recording area 105, the actual sequence data cannot be accessed when the DVD-Video content sequence uses the pre-recording area 105. It is possible.
- the data area to be loop-reproduced is not necessarily limited to the pre-recording area 105. For example, the loop may be performed after jumping from the pre-recording area 105 to another appropriate area.
- control information for jumping to the lead-out area 103 is previously written in the pre-recording area 105, and the content sequence of the DVD-Video is written in the pre-recording area. Playback will end when 105 is used.
- control information to that effect may be written in the pre-recording area 105 in advance so as to display, for example, "this data cannot be reproduced". Good.
- the information to be written in the pre-recording area 105 is not limited to the above-mentioned example, and various other information can be considered. However, in order to protect the content more reliably, it is preferable that the control information be a control information functioning to prevent the reproduction of the dead-copied content.
- the content data is divided into the partial recording areas 102A. Reproduction becomes difficult. Therefore, viewing of illegally copied content is prevented, and this also contributes to prevention of illegal copying, so that more robust content protection can be achieved.
- the content can be more reliably protected. The above effect can be exerted only by providing the pre-recording area 105 in the user data area 102.
- the capacity standard is 8.54 GBytes, but in practice, it can be said that both 8.544 GBytes and 8.535 GBytes are within the standard. , 4.70GBytes is the standard value, and 4.704GBytes and 4.695GBytes are within the standard). That is, there is an allowable amount of 9 MBytes. Therefore, if the total data amount of the pre-recording area 105 of the optical disc 100 is set to be 9 MBytes or less, the user recording capacity of the optical disc 100 is 8.54 GBytes, and it is also possible to access with DVD-Video data of 8.54 GBytes. It is. Similarly, when the recording layer is a single layer, the pre-recording area may be set within the margin of the standard capacity.
- the optical disc 100 can exhibit a content protection function while maintaining compatibility.
- the optical disk 100 which has been described above in relation to the unauthorized copy of the optical disk 100, is a recording medium on which the user can write data freely. Apart from copying, it is required that legal copies can be recorded and reproduced normally.
- the optical disc 100 since the user data area 102 is divided into a plurality of partial recording areas 102A by the pre-recording area 105, it is necessary to avoid the pre-recording area 105 and record sequentially in the partial recording area 102A. There is. Further, the data to be recorded at that time must be written in such a manner that the division of the recording area by the pre-recording area 105 does not affect the file structure, such as a multi-extent!
- the writable area in effect is smaller than that of the ROM disc 200 by the pre-recording area 105. Therefore, when writing on the optical disc 100, it is important to obtain the address information of the pre-recording area 105. If the address information of the pre-recording area 105 is recorded in advance in the lead-in area 101 or fixed as a standard value, it can be known at the time of data writing, and writing can be executed normally.
- FIG. 6 shows the configuration of the recording / reproducing apparatus according to the present embodiment.
- the recording / reproducing device 300 in FIG. 6 writes information to the optical disc 100 based on the “information recording method” of the present invention under the control of a CPU (Central Processing Unit). It has a function of recording and reading information recorded on the optical disc 100.
- the recording / reproducing apparatus 300 includes a spindle motor 351, an optical pickup 352, a signal recording / reproducing means 353, a CPU (drive control means) 354, a memory 355, a data input / output control means 306, an operation control means 307, an operation button 310, and a display panel. 311 and a bus 357.
- the spindle motor 351, the optical pickup 352, the signal recording / reproducing means 353, the CPU (drive control means) 354 and the memory 355 may constitute a disk drive (hereinafter, appropriately referred to as a drive).
- the data input / output control unit 306, the operation control unit 307, the operation button 310, and the display panel 311 may constitute a host computer (hereinafter, appropriately referred to as a host).
- communication means may be constituted by the CPU (drive control means) 354 and the bus 357.
- the spindle motor 351 is means for rotating and stopping the optical disc 100. It is configured to operate when the disk 100 is accessed. More specifically, the spindle motor 351 is configured to rotate and stop the optical disc 100 at a predetermined speed while receiving spindle servo by a servo unit (not shown) or the like! Puru.
- the optical pickup 352 is means for recording and reproducing data on and from the optical disc 100, and includes a semiconductor laser device and a lens. More specifically, the optical pickup 352 irradiates the optical disc 100 with a light beam such as a laser beam as read light at the first pulse during reproduction, and modulates the write light at the second power at the second power during recording. Irradiate while
- the signal recording / reproducing means 353 performs recording / reproducing on the optical disc 100 by controlling the spindle motor 351 and the optical pickup 352. More specifically, the signal recording / reproducing means 353 includes, for example, a laser diode (LD) driver, a head amplifier, and the like.
- the laser diode driver (LD driver) drives a semiconductor laser (not shown) provided in the optical pickup 352.
- the head amplifier amplifies the output signal of the optical pickup 352, that is, the reflected light of the light beam, and outputs the amplified signal.
- the signal recording / reproducing means 353 operates under the control of the CPU 354 together with a timing generator (not shown) to record and reproduce the optimum laser power by the OPC pattern recording and reproduction processing.
- a semiconductor laser (not shown) provided in the optical pickup 352 is driven so that the determination can be made.
- the signal recording / reproducing means 353, together with the optical pickup 352, constitutes an example of the “writing means” according to the present invention.
- the memory 355 is provided with a general data processing and OPC processing in the recording / reproducing apparatus 300, such as a buffer area for recording / reproducing data and an area used as an intermediate buffer when converting to data used by the signal recording / reproducing means 353.
- the memory 355 is a program for performing the operation as the recorder device, that is, a ROM area for storing firmware, and a RAM area for storing buffers used for compression / expansion of video data and variables necessary for the program operation. And so on.
- the memory 355 stores a writing software as an example of the "computer program" of the present invention. This writing software has a function as an authoring tool for characteristic data processing in this embodiment.
- the CPU (drive control means) 354 is a means for controlling the entire recording / reproducing apparatus 300, is connected to the signal recording / reproducing means 353 and the memory 355 via the node 357, and instructs each control means. It is configured as follows. Normally, software or firmware for operating the CPU 354 is stored in the memory 355. The CPU 354, together with the memory 355, constitutes an example of the “control means” according to the present invention.
- the data input / output control means 306 is configured to control data input / output to / from the recording / reproducing apparatus 300 from outside, and to store / fetch data in / from a data buffer on the memory 355.
- the data input / output is a video signal
- the data received from the outside is compressed (encoded) into the MPEG format and output to the power memory 355 at the time of data input, and the MPEG data received from the memory 355 is output at the time of data output. Decompress and output format data to outside.
- the operation control means 307 has a function of receiving an operation instruction from the operation button 310 to the recording / reproducing device 300 and a function of transmitting display data to the display panel 311. Specifically, an instruction by the operation button 310 such as recording or reproduction is transmitted to the CPU 354, and the operation state of the recording / reproducing apparatus 300 is output to the display panel 311 during recording or reproduction, and is not illustrated. , A CPU, a memory, and the like.
- Such a recording / reproducing device 300 is, for example, a home recorder device for recording / reproducing a video.
- the recording / reproducing device 300 operates as a recorder device by executing the program stored in the memory 355 by the CPU 354, that is, records a video signal from a broadcast receiving tuner or an external connection terminal on a disc, and outputs the received signal to a television receiver. It is possible to output a reproduced video signal to an external display device such as a digital camera.
- FIG. 7 shows a recording operation procedure for the optical disc 100 by the recording / reproducing apparatus 300 as an embodiment of the information recording method of the present invention.
- FIG. 8 shows a procedure for writing data to the user data area 102.
- step S201 When the optical disc 100 is loaded (step S201), the optical pickup is controlled under the control of the CPU 354. A seek operation is performed in step 352, and the type of an optical disk such as a DVD-R or RW is determined (step S202). More specifically, for example, it is determined by the value of “Book Type” in the management information physically recorded in the control data zone.
- the management information identifies the address information of the recorded area, the number of recording layers, and whether the recording layer is an opposite track path, a parallel track path, or a single layer.
- the management information identifies whether or not the lead-out area is formed in advance, and whether the pre-recording area 105 is an emboss pit or a pre-pit formed by irradiation of a recording laser. At the same time, a start address and an end address are obtained for each of the pre-recording areas 105.
- These management information can be obtained in advance if the standard of the optical disc 100 is determined, and may be stored in advance in the memory 355 separately from or as part of the writing software, for example.
- step S204 it is determined whether or not the optical disc is ejected.
- step S204: No it is further determined whether or not the drive is instructed to start recording (step S205).
- step S205: Yes OPC processing for detecting the optimum recording laser power is performed (Step S206), and if the optimum recording laser power can be detected (Step S207: Yes)
- the amount of information to be recorded in the L0 layer and the L1 layer is calculated under the control of the CPU 354, and the turning point in the L0 layer and the corresponding address in the L1 layer are calculated (step S208).
- the allowable writing amount in the L1 layer can be determined from the start address and the end address of the pre-recording area 105 in the L1 layer, that is, the size of the total occupied area of the pre-recording area 105.
- step S209 it is determined whether there is information to be recorded in the L0 layer. If there is information to be recorded in the L0 layer (step S209: Yes), first, the data 400 to be recorded is lOOOMBytes or smaller by the authoring tool stored in the memory 355 described above. It is organized as a file 401 (step S210: see FIG. 8). 0 This file 401 is applied with a multi-extent.
- step S211 data is written to the LO layer in file units (step S211). Specifically, the CPU 354 controls the signal recording / reproducing means 353 and the optical pick-up 352, and in the user data area 102, does not skip the pre-recording area 105. ⁇ ⁇ ⁇ ⁇ Writes file data to each partial recording area 102A one by one. Go out.
- each address information of the pre-recording area 105 has been acquired, so that it is prevented beforehand that file data is erroneously written to the pre-recording area 105.
- the size of each file 401 exactly matches the size of the partial recording area 102A, and each file 401 is completely embedded in the partial recording area 102A.
- data 400 is recorded in the L0 layer.
- buffer data is added to a part of the middle area 104 of the L0 layer (step S212). Further, after the interlayer jump, buffer data is added as a part of the middle area 104 of the L1 layer (step S213).
- step S214 it is determined whether there is information to be recorded on the L1 layer (step S214). If there is information to be recorded in the L1 layer (step S214: Yes), the data to be recorded is organized into files of lOOOMBytes or smaller in size by the above-mentioned authoring tool (step S215).
- step S216 data writing is performed for the L1 layer in file units.
- Each file 401 is completely embedded in the partial recording area 102A, and data is also recorded in the L1 layer.
- step S217 it is determined whether or not to update the file system (FS) in the user data area 102 (step S217). If it is to be updated (step S217: Yes), the file system is updated (step S217). S 218).
- FS file system
- Step S219 management information and the like are recorded in the lead-in area 101
- step S220 buffer data is added to the lead-out area 103
- step S220 buffer data is added to the remaining part of the middle area 104 of the L0 layer.
- Step S221 buffer data is added to the remaining part of the middle area 104 of the L1 layer (step S222).
- information to be recorded is divided into individual files 400 whose file size is equal to or smaller than the size of the partial recording area 102A, and is written in the partial recording area 102A in file units.
- information is written on the optical disc 100 such that the pre-recording area 105 is not overwritten and partly lost.
- multi-extent is applied to the file data written to the optical disk 100, even if the file is divided, the data can be reproduced without any problem.
- the information to be recorded is data in a video recording format using an information recording device using a multi-extent file system using UDF 2.0
- the data may be recorded while being divided in the pre-recording area 105.
- the data since the data is recorded as a multi-extent in the partial recording area 102A, the data can be normally reproduced as in the case described above.
- the data of the information to be recorded in the recording / reproducing apparatus is divided into individual files whose file size is smaller than the size of the partial recording area 102A.
- one file 500 (FIG. 9 (a)) in which insertion data 502 that is not involved in the reproduction of this information is inserted in each part corresponding to the pre-recording area 105 of the data 501 to be recorded. See also)! /.
- meaningless data is written as insertion data 502 in a portion corresponding to pre-recording area 105, and file 500 is created. Then, as shown in FIG. 9A, the file 500 is continuously written in the user data area 102. At this time, since the area where the input data 502 is to be written corresponds to the pre-recording area 105, writing of the extra data, ie, the insertion data 502, is prohibited or restricted and is lost. In return, the original information 501 to be recorded is Due to the gap, the data is written so as to avoid the pre-recording area 105. Therefore, also in this case, it is possible to selectively record information in the partial recording area 102A.
- the writing operation may not be performed on the pre-recording area 105 as shown in FIG. 9B.
- the insertion data 502 to be written in the pre-recording area 105 has been inserted into the information to be recorded for the purpose of generating a gap corresponding to the pre-recording area 105, so that there is no need to actually write the data. .
- it is erroneously written to the partial recording area 102A normal reproduction will be hindered. That is, by stopping the writing of the insertion data 502, such a situation can be prevented.
- the DVD-Video content has a file system limited to UDF1.02 and does not allow multi-extent. For this reason, the division of data itself causes a malfunction. Furthermore, the relative address is used in the DVD-Video content. If data is inserted in the pre-recording area 105 on the way based on this recording method, the relative address will change, and normal playback will be performed. It becomes extremely difficult.
- the decrypted data should be constituted by a file of 1024 MBytes based on the standard.
- the size of the partial recording area 102A is lOOOMBytes, the data is always partially lost in any file capacity, and complete reproduction is prevented.
- non-overwritable for the pre-recording area in the information recording medium of the present invention includes a case where physical rewriting is performed to such an extent that complete reproduction cannot be performed, in addition to a case where writing cannot be performed at all.
- the lead-in area, the lead-out area, or the middle area may have a further subdivided configuration.
- a parallel system may be adopted as a recording / reproducing system in addition to the above-described opposite system.
- the information recording medium of the present invention is not limited to a two-layer single-sided, that is, a dual-layer double-sided, which is not limited to the dual-layer.
- the recording layer may be a single layer or three or more layers without being limited to two layers as described above.
- an optical disc such as a double-layer DVD-R or DVD-RZW is described. It is also applicable to high-capacity recording media such as Blu-ray discs.
- the present invention is not limited to the above-described embodiments, and may be modified as appropriate without departing from the spirit or spirit of the readable invention.
- the medium, the information recording device and method, and the computer program are also included in the technical scope of the present invention.
- the information recording medium, the information recording apparatus and method, and the computer program according to the present invention can be used for a high-density optical disc such as a DVD, and can be used for an information recording apparatus such as a DVD recorder. . Further, for example, the present invention can also be used for an information recording device mounted on various consumer or business computer devices or connectable to various computer devices.
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- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims
Priority Applications (2)
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US11/596,077 US8027240B2 (en) | 2004-05-10 | 2005-05-09 | Information recording medium, information recording device and method, and computer program |
JP2006513020A JP4138838B2 (ja) | 2004-05-10 | 2005-05-09 | 情報記録媒体、情報記録装置及び方法、並びにコンピュータプログラム |
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Cited By (2)
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JP2007141342A (ja) * | 2005-11-17 | 2007-06-07 | Toshiba Corp | 多層光ディスクの記録領域決定方法および記録再生装置 |
EP2043091A3 (en) * | 2007-09-28 | 2011-03-23 | Hitachi Ltd. | Optical information reproducing method and apparatus, and optical information recording medium |
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JP2008250475A (ja) * | 2007-03-29 | 2008-10-16 | Brother Ind Ltd | 情報処理装置、ネットワークシステム、およびプログラム |
US10158898B2 (en) | 2012-07-26 | 2018-12-18 | Comcast Cable Communications, Llc | Customized options for consumption of content |
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JP2001057022A (ja) * | 1999-08-18 | 2001-02-27 | Sony Corp | データ記録媒体、データ記録装置、データ記録方法、データ再生装置およびデータ再生方法 |
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WO2001048753A1 (fr) * | 1999-12-28 | 2001-07-05 | Mitsubishi Chemical Corporation | Disque optique reinscriptible a changement de phase dote partiellement d'une region rom et procedes d'enregistrement et d'effacement de donnees pour disques optiques |
US20020080695A1 (en) * | 2000-10-27 | 2002-06-27 | Noriaki Horii | Recording apparatus for information recording medium and recording method |
KR20030005361A (ko) * | 2001-03-19 | 2003-01-17 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 레코딩을 위해 레코딩 시작과 종료 위치가 시프트된 다층기록매체 |
JP2005063533A (ja) * | 2003-08-08 | 2005-03-10 | Toshiba Corp | 情報記録媒体および情報記録媒体への記録方法ならびに情報記録再生装置 |
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2005
- 2005-05-09 US US11/596,077 patent/US8027240B2/en not_active Expired - Fee Related
- 2005-05-09 JP JP2006513020A patent/JP4138838B2/ja not_active Expired - Fee Related
- 2005-05-09 WO PCT/JP2005/008443 patent/WO2005109431A1/ja active Application Filing
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JP2000331412A (ja) * | 1999-05-20 | 2000-11-30 | Pioneer Electronic Corp | 情報記録媒体製造装置、情報記録媒体、情報記録装置及び情報記録方法 |
JP2001057022A (ja) * | 1999-08-18 | 2001-02-27 | Sony Corp | データ記録媒体、データ記録装置、データ記録方法、データ再生装置およびデータ再生方法 |
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EP2043091A3 (en) * | 2007-09-28 | 2011-03-23 | Hitachi Ltd. | Optical information reproducing method and apparatus, and optical information recording medium |
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JPWO2005109431A1 (ja) | 2008-03-21 |
JP4138838B2 (ja) | 2008-08-27 |
US20080025193A1 (en) | 2008-01-31 |
US8027240B2 (en) | 2011-09-27 |
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