WO2005109430A1 - 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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- WO2005109430A1 WO2005109430A1 PCT/JP2005/008442 JP2005008442W WO2005109430A1 WO 2005109430 A1 WO2005109430 A1 WO 2005109430A1 JP 2005008442 W JP2005008442 W JP 2005008442W WO 2005109430 A1 WO2005109430 A1 WO 2005109430A1
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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
- G11B20/10—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
- 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
- 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
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. At the end corresponding to the recording area of the read-only recording medium where the reproduction control information is recorded.
- the area where the reproduction control information should be copied in the recording information is pre-recorded. It corresponds to the area.
- the “reproduction control information” means control information for controlling reproduction of content information such as video information and audio information on a reproduction-only recording medium, and is necessary for reproducing the content information. Information. Therefore, when the above-mentioned copying is attempted, the recording of the reproduction control information in the pre-recording area is prohibited or restricted. The recorded information copied in this manner is extremely difficult to normally reproduce because the reproduction control information is missing. That is, the pre-recording area functions to prevent the recording and reproduction of the user information recording area, and the reproduction of the information copied from the reproduction-only recording medium is prevented even if the information is decrypted. .
- 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.
- the pre-recording area is shifted to the end of the user information recording area.
- the actually writable area of the user information recording area is grouped into one physically continuous area. This makes it easier to control recording and playback, which is convenient for data management. In other words, when information is recorded by the user, the existence of the pre-recording area hardly interferes.
- the information recording medium further includes a lead-in area preceding the user information recording area, and a lead-out area following the user information recording area, The end portion is a portion of the information recording area adjacent to the lead-in area or the lead-out area.
- the pre-recording area is located at the beginning of the user information recording area (ie, a portion adjacent to the lead-in area) or at the end of the user information recording area (ie, a portion adjacent to the lead-out area). Is set to When the pre-recording area is moved to the end in this way, control during recording and reproduction, which is convenient for data management, can be made relatively easy.
- embossed pits are previously formed in the pre-recording area.
- the pre-recording area cannot be overwritten by forming embossed 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 the prerecording area by irradiation with a recording laser.
- the pre-recording area cannot be overwritten by forming a pre-pit 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 to the information recording medium.
- Such pre-pits are written by, for example, an irreversible change recording method or a destructive writing method by heating by irradiating a laser beam.
- each of the recording areas forming a part of the user information recording area is formed, and the recording area has a plurality of recording layers stacked one on another, A start end portion and an end portion of the user information recording area are respectively arranged in opposing regions in the different recording layers, and the pre-recording area is set at the end portion.
- the user information recording area is provided across a plurality of recording layers, and the start end and the end thereof are respectively arranged in opposing areas in different recording layers.
- Such a configuration is realized in an “opposite method” in which a recording track path is directed in the opposite direction between two adjacent layers, which is adopted when the information recording medium is a multilayer type.
- the reproduction is performed by jumping from the start end of the user information recording area to the end where the reproduction control information is to be recorded, that is, the pre-recording area. Since they are opposed to each other, the irradiation position of the laser beam hardly changes at all in the layer surface direction, and the search time during this period is short, for example.
- reproduction restriction information that functions to prevent reproduction of information recorded in the user information recording area is written in the pre-recording area.
- the reproduction-only recording medium power in the reproduction of the copied information, the area where the reproduction control information that should use the reproduction control information of the information should be recorded, ie, the pre-recording area Force readout is performed.
- the reproduction restriction information is read instead of the reproduction control information, and reproduction from the user information recording area is prevented based on the reproduction restriction information.
- the reproduction restriction information may include control information for loop-reproducing the information recorded in a predetermined area.
- 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.
- non-reproducible notification information for indicating that reproduction of the information recorded in the user information recording area is prohibited is written. I have.
- the user information recording area is read as described above. Although the reproduction of power is terminated, a message is displayed indicating that reproduction of the information recorded in the user information recording area is prohibited based on the reproduction impossible notification information.
- 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 pre-recording area, Scan prohibition information for invalidating the scan instruction of the information recorded in the information recording area is written.
- the scanning instruction for the user information recording area in the reproduction period of the pre-recording area and the period before that is based on the scanning prohibition information Invalidated. That is, during the above period, When a scanning instruction is input to the device and scanning is started from the current reading position, there is a possibility that the copied information may be reproduced at least partially. Since the reproduction prohibition information is written in advance so as to be read, such a situation is prevented.
- a start address and an end address of the pre-recording area are fixed.
- the start address and the end address of the pre-recording area are recorded on the information recording medium as part of the fixed control information, or are standardized. Therefore, since the position and range of the pre-recording area can be known in advance, it is possible to prevent a situation in which information is erroneously written to the pre-recording area in normal information writing.
- the protection of the content is ensured based on the principle described above. can do.
- 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 has a pre-recording area that prevents recording and reproduction of the user information,
- control means for controlling the writing means are examples of controlling the writing means.
- 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 substantially a recordable area, That is, it is an area where the user can freely write.
- the writing means performs the control based on the address information of the pre-recording area of the control means so that the writing is performed only in the area of the user information recording area excluding the pre-recording area. Controlled.
- the address information of the pre-recording area to be used may be stored in advance in the control means if known, or the information recording medium strength may be read.
- 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 has a pre-recording area that prevents recording and reproduction of the user information, An information recording method for recording information to be recorded on an information recording medium provided at an end portion corresponding to a recording area portion where reproduction control information is recorded on a recording medium, the information recording medium being based on address information of the pre-recording area. And a writing step of writing the information to be recorded 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 storing the computer program and executed by the computer, or Execute the computer program after downloading it to the computer via communication means, for example
- a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk storing the computer program and executed by the computer, or Execute the computer program after downloading it to the computer via communication means, for example
- the computer program of the present invention can also adopt various aspects corresponding to the various aspects of the information recording apparatus of the present invention described above.
- 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 its various aspects) 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 read-only recording medium can be used while maintaining compatibility. It is possible to protect the recorded content.
- 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 information recording method of the present invention since a 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 a first embodiment of the present invention, and a schematic cross-sectional view of the optical disc,
- FIG. 3B is a schematic conceptual diagram (b) of the recording area structure in the radial direction.
- FIG. 2 is a conceptual configuration diagram showing a layout of a data area of an optical disk according to a first embodiment of the present invention, and a conceptual configuration diagram showing a layout of a data area of a ROM disk corresponding to the optical disk.
- FIG. 3 is a conceptual configuration diagram showing a data structure of an optical disk according to a first embodiment of the present invention, and a conceptual configuration diagram showing a data structure of a ROM disk corresponding to the optical disk.
- FIG. 4 is a conceptual diagram showing a data reading procedure on an optical disc according to a first embodiment of the present invention, and a conceptual diagram showing a data reading procedure on a ROM disc corresponding to the optical disc.
- FIG. 5 is a flowchart showing a normal content reproducing operation procedure on the ROM disk according to the first embodiment of the present invention.
- FIG. 6 is a flowchart showing a reproducing operation procedure of the content copied to the optical disc according to the first embodiment of the present invention.
- FIG. 7 is a block diagram showing a configuration of a recording / reproducing device as an information recording device according to a first example of the present invention.
- FIG. 8 is a flowchart showing a recording operation procedure for an optical disc by the recording / reproducing apparatus according to the first embodiment of the present invention.
- FIG. 9 is a conceptual configuration diagram showing a layout of a data area of an optical disk according to a second embodiment of the present invention, and a conceptual configuration diagram showing a layout of a data area of a ROM disk corresponding to the optical disk.
- FIG. 1 (a) shows a basic structure of an optical disc having a plurality of recording areas according to a first embodiment of the information recording medium of the present invention
- FIG. 1 (b) shows a schematic cross section of the optical disc. Shows the recording area structure in the radial direction, which is associated with.
- 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 a recording layer, an LO layer and an L1 layer, 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 LO 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 divided for each sector to which an address is assigned, and one ECC (Error Correcting Code) block, which is a unit of error correction processing, is formed for every 16 sectors.
- ECC Error Correcting Code
- the condensing position of the laser beam LB irradiated from the transparent substrate 106 side is determined according to which of the L0 layer and the L1 layer is set. Recording and reproduction can be performed by selecting one of the recording layers. Also, here, as a recording or reproducing procedure of the two-layer type optical disc 100, from the inner peripheral side to the outer peripheral side (that is, the lead-in area 10) of the L0 layer. 1 to the middle area 104), and an opposite method in which recording or reproduction is performed in the direction from the outer periphery to the inner periphery of the LI layer (that is, from the middle area 104 to the lead-out area 103). I have.
- the lead-in area 101 is an area that is first accessed when recording or reproducing data on or from the optical disc 100. Inside the lead-in area 101, 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.
- a pre-recording area 105 is set in a range adjacent to the lead-out area 103 in the user data area 102.
- the pre-recording area 105 records user data in the pre-recording area by using embossed pits when the optical disc 100 is a DVD-RW or by using pre-pits by irradiating a recording laser when the optical disc 100 is a DVD-R. It is formed in advance as a region that prevents reproduction.
- the lead-out area 103 is an area subsequent to 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 reproducing position for the LO layer and the L1 layer from deviating from the substrate, but preventing the recording or reproducing 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 buffering data force is written to a part of the middle area 104 of the SL0 layer.
- FIG. 2 to 4 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 a layout of a data area in each recording medium. The arrangement of the recording layers in FIG. 2 is upside down from that in FIG. 1 (b).
- FIG. 3 shows a data structure of each recording medium, and
- FIG. 4 shows a data reading procedure.
- FIG. 5 and FIG. 6 respectively show a reproducing operation procedure of the regular content by the ROM disc 200 and the content copied to the optical disc 100.
- the compatibility of the optical disc 100 is maintained because the basic structure of the optical disc 100 is almost the same as that of the read-only ROM (Read Only Memory) disc 200. That is, the recording area of the ROM disc 200 includes a lead-in area 101, a user data area 102, a lead-out area 103 and a middle area 104 corresponding to the lead-in area 101, the user data area 202, the lead-out area 203 and the lead-in area 101 of the optical disc 100, respectively. It is divided into middle area 204.
- the 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 1 has been written.
- the content data in the user data area 202 is written with a relative address, and the address information is included in the video reproduction control information PB1. Further, where various data are recorded and the stored information are managed by the file system FS.
- the ROM disk 200 is an example of the “reproduction-only recording medium” according to the present invention
- the video reproduction control information PB1 is an example of the “reproduction control information” according to the present invention.
- the pre-recording area 105 is set in an area of the optical disk 100 corresponding to the area 202c of the video reproduction control information PB1 on the ROM disk 200.
- the pre-recording area 105 is set in an area between 8.535 GBytes and 8.544 GBytes in the optical disc 100 as shown. Therefore, the user data area 102 is rounded down to 8.54 GBytes, that is, a size conforming to the standard.
- the copy data of the user data area 202 is written into the user data area 102 from the area 102a starting with the file system FS.
- the actual recording area of the user data area 102 is just before the pre-recording area 105, and the physical recording after the pre-recording area 105 is physically impossible.
- the contents of the ROM disk 200 include the data of the area 202c corresponding to the pre-recording area 105, that is, the video reproduction control information PB1. It will be recorded only in the state where it fell off.
- control information for loop-reproducing the information of the pre-recording area 105 is written in the pre-recording area 105.
- 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. 7) described later and which can support the ROM disk 200 is applied.
- the insertion of the ROM disk 200 is used as a trigger to perform servo processing such as focus adjustment of the optical pickup, and the ROM disk 200 is loaded (step S11).
- various types of information are 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 is a DVD
- the file system FS is continuously read from the area 202a and checked (step S13). At this time, The start address "A" of the connection is obtained.
- step S14 If it is determined by the file system FS that the format of the inserted disc is DVD-Video, the file in the data area 202b, which is the top of the user data area 202 shown in Fig. 4 and is 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). After that, the content menu of the first file card is loaded (step S17). Are displayed on the playback device. Next, 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). Then, in accordance with the read navigation information, a jump is made 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”, ie, The video reproduction control information PB1 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.
- reproduction on the optical disc 100 on which the content data of the ROM disc 200 has been dead-copied is performed on the reproducing apparatus in the procedure shown in FIGS. 4 and 6.
- the operation procedure of the reproducing apparatus in this case 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.
- step S120 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 read (step S12 Do and read).
- step S122 the program jumps to the area represented by the address "Z" in the user data area 202 (step S122), and data is reproduced from the address "Z" (step S123).
- the address “Z” points to the pre-recording area 105 as shown in FIG. Therefore, in place of the video reproduction control information PB1, data previously written in the pre-recording area 105 is read, and this is, for example, the control information that is an example of the “reproduction restriction information” according to the present invention. If so, the playback device performs subsequent operations according to the information.
- the optical disc 100 is scanned by the opposite method (see FIG. 2), when jumping to the area of the address “Z”, the irradiation position of the laser beam needs to be hardly or completely changed in the layer surface direction. , Search time is short.
- control information for causing the information of the pre-recording area 105 to be reproduced in a loop is written, and an infinite loop is intentionally formed in the pre-recording area 105. That is, when the navigation pack corresponding to the address "Z" is read (step S124), the flag variable N representing the address of the data to be reproduced is set to 1 (step S125), and then the address "Z" is returned. Jump to the area represented by (step S126). Thereafter, a series of steps are repeated until the forced termination is completed. In the meantime, for example, the same screen meaningless on the playback device is displayed.
- the program data of the infinite loop is written in advance in the pre-recording area 105 instead of the video reproduction control information PB1, the content is dead-copied from the ROM disk 200.
- the DVD-Video content sequence uses the pre-recording area 105, the actual data of the content cannot be accessed. Therefore, it is possible to more reliably prevent the reproduction of the copied content.
- the position of the loop need not always be the pre-recording area 105.
- 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 pre-written in the pre-recording area 105, and the reproduction is terminated when the DVD-Video content sequence uses the pre-recording area 105.
- 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 example, and various other information can be considered. However, in order to ensure the protection of the content, it is preferable that the control information or the like function to prevent the reproduction of the dead-copied content.
- Such control information may be written not only in the pre-recording area 105 but also in other areas such as the lead-in area 101. For example, if a key such as a remote controller is received during a period from reading of the lead-in area 101 to reading of the pre-recording area 105, 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 a reproduction instruction such as not accepting a key during the read operation is set.
- the optical disc 100 and the ROM disc 200 are of a two-layer type, As such, the recording and reproduction are performed as shown by the arrows in FIG. Therefore, according to the optical disc 100 of the present embodiment, the physical distance from the head area of the user data area 102 to the pre-recording area 105 is shorter than that in the case of the single-layer or parallel system. There is an advantage that time is short.
- the position of the pre-recording area 105 on the optical disc 100 is determined by the relationship with the recording position of the reproduction control information on a copy-preventing recording medium such as the ROM disc 200. Therefore, it is desirable that the configuration, recording / reproducing method, layout of each area, etc. of both are physically or logically symmetric (see FIGS. 2 and 3), and compatibility can be maintained. .
- the force of setting the pre-recording area 105 at the end of the user data area 102 is the same as that of a normal read-only recording medium. It depends. By moving the pre-recording area 105 as close to the end of the user data area 102 as possible, the internal recording area can be easily used, which is convenient.
- the optical disc 100 is DVD-R or DVD-RZW
- the standard of the capacity is 8.54GBytes, but in practice, it can be said that both 8.544GBytes and 8.535GBytes 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, the range of the pre-recording area 105 of the optical disc 100 is set within 8.544 GBytes after 8.535 GBytes, while the control information is recorded on the ROM disc 200, for example, a DVD-Video, so as to access this data range.
- the user recording capacity of the optical disc 100 is 8.54 GBytes, and the DVD-Video data of 8.54 GBytes can also be accessed.
- 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 position and range of the pre-recording area 105 on the optical disc 100 are related to the recording position and the recording range of the video reproduction control information PB on the ROM disc 200. That is, when a recording medium (here, the ROM disk 200) on which the content to be protected is recorded is newly created, the position and range of the video reproduction control information in the content are determined by the optical data. It is set based on the position and range of the pre-recording area 105 set in advance in the disk 100.
- the optical disc 100 may be set based on the position and range of the area 202c in which is recorded.
- the optical disc 100 according to the present embodiment can exert the above-described effects when the optical disc 100 and the ROM disc 200 correspond to each other.
- the optical disk 100 which describes the aspects related to illegal copying of the optical disk 100, is a recording medium on which the user can write data freely.Besides the above illegal copying, it is possible to normally record and reproduce legal copies. Is required. In this regard, since the optical disc 100 has no special operation on the recording surface other than the provision of the pre-recording area 105, such data recording and reproduction can be performed as usual.
- the writable area in effect is smaller than that of the ROM disk 200 by the pre-recording area 105. Therefore, the end address of this writable area is defined as Last Recordable Address so that it is not written any more, and the address information is recorded in advance in the lead-in area 101 or fixed as a standard value. If this is done, it is ensured that writing is performed normally.
- the writable area that is, the substantial start address and end address of the user data area can be obtained based on the start address and end address of the pre-recording area 105.
- FIG. 7 illustrates a configuration of the recording / reproducing apparatus according to the present embodiment.
- the recording / reproducing device 300 in FIG. 7 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, It comprises 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, 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, and is configured to operate when accessing the optical disc 100. 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 a unit that performs recording and reproduction on 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 has 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 into 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 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 the outside, and to perform storage / retrieval to / 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. 8 shows a recording operation procedure of the recording / reproducing apparatus 300 for the optical disc 100 as an embodiment of the information recording method of the present invention.
- step S201 When the optical disk 100 is loaded (step S201), a seek operation is performed by the optical pickup 352 under the control of the CPU 354, and the type of the optical disk such as a DVD-R or RW is determined (step S201). 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 pre-recording area 105 is a force that is either an emboss pit or a pre-pit by irradiation of a recording laser, and The start address and the end address of the pre-recording area 105 are identified.
- these identification information can be obtained in advance if the standard form of the optical disc 100 is determined. For example, even if the identification information is stored in advance in the memory 355 separately from or as part of the writing software, Yo,
- step S204 it is determined whether or not the optical disc is ejected (step S204).
- 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 write amount in the L1 layer is calculated based on the end address of the writable area, that is, the Last Recordable Address. This address can also determine the starting address of the pre-recording area 105.
- it is determined whether there is information to be recorded in the LO layer (step S209). If there is information to be recorded in the LO layer (step S209: Yes), data is written to the LO layer, for example, in units of sectors or ECC blocks (step S210). Then, buffer data is added to a part of the middle area 104 of the LO layer (step S211). Further, after the interlayer jump, buffer data is added as a part of the middle area 104 of the L1 layer (step S212).
- step S213 it is determined whether there is information to be recorded on the L1 layer (step S213). If there is information to be recorded in the L1 layer (step S213: Yes), writing is performed in the L1 layer, for example, in sector units or ECC block units (step S214).
- the amount of data to be written to the L1 layer is the last recordable amount.
- the address is predetermined based on the address, it is prevented that data is erroneously written to the pre-recording area 105 here. Therefore, data is properly recorded on the optical disc 100.
- step S215 it is determined whether or not the file system (FS) in the user data area 102 should be updated. If it should be updated (step S215: Yes), the file system is updated (step S216). ).
- step S220 After the interlayer jump, buffer data is added to the remaining part of the middle area 104 of the L1 layer (step S220).
- FIG. 9 corresponds to FIG. 2, and shows each of the optical disk 110 according to the present embodiment arranged at the upper side in the figure and the corresponding ROM disk 210 arranged at the lower side in the figure.
- the layout of the data area is shown.
- the optical disc 110 of the present embodiment the same components as those of the optical disc 100 of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
- the optical disc 110 has a basic structure similar to that of the optical disc 100, with the force recording area 115 set at the end of the data area 112 of the L0 layer, that is, the area immediately before the middle area 104.
- the pre-recording area 115 is provided between contents in the data structure, but is provided at the end of one of the two layers in the physical structure. As in the first embodiment, the content data in the data area 112 is not divided by the pre-recording area 115, which is convenient for data management.
- Such an optical disk 110 exerts a content protection function on the ROM disk 210 shown in FIG. That is, in the ROM disk 210, the video reproduction control information PB2 is recorded in the data area 212c corresponding to the pre-recording area 115. It should be noted that due to such a configuration, the optical disk 110 and the ROM disk 210 each perform a reproducing operation in the procedure shown by the arrow.
- the present invention has been described with reference to the embodiments, the information recording medium, the information recording apparatus and method, and the computer program of the present invention can be variously modified in addition to the above-described embodiments. is there.
- the position and range of the pre-recording area are completely matched with the position and range of the recording area of the video reproduction control information.
- the setting may be made so that at least a part of the area corresponding to the recording area of the video reproduction control information is included. In this case, the video reproduction control information can be obtained only in an incomplete state, and the reproduction of the content can be prevented as in the embodiment.
- the pre-recording area is set immediately before the lead-out area, but may be set immediately after the lead-in area.
- the pre-recording area achieves the purpose of content protection in principle only by being set corresponding to the position and range of the playback control information of the content to be protected. It is possible.
- the pre-recording area is set, for example, at the center of the data area, it is necessary to consider the case where the recording data is divided by the pre-recording area, and data management becomes complicated. The adverse effects such as complication may be considered. Therefore, in the present invention, the pre-recording area is set at the end of the data area.
- non-overwritable for the pre-recording area in the information recording medium of the present invention means that, in addition to not being able to write at all, physical rewriting is performed to such an extent that complete reproduction cannot be performed. Also included.
- the lead-in area, the lead-out area, or the middle area may be further subdivided.
- 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 large-capacity recording media such as Blu-ray discs.
- the present invention is not limited to the embodiments described above, 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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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims
Priority Applications (2)
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JP2006513019A JP4138837B2 (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 |
US11/596,079 US20100014395A1 (en) | 2004-05-10 | 2005-05-09 | Information recording medium, information recording apparatus and method, and computer program |
Applications Claiming Priority (2)
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JP2004-140248 | 2004-05-10 | ||
JP2004140248 | 2004-05-10 |
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WO2005109430A1 true WO2005109430A1 (ja) | 2005-11-17 |
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PCT/JP2005/008442 WO2005109430A1 (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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US (1) | US20100014395A1 (ja) |
JP (1) | JP4138837B2 (ja) |
WO (1) | WO2005109430A1 (ja) |
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JP5564957B2 (ja) * | 2010-01-21 | 2014-08-06 | ソニー株式会社 | 多層光記録媒体、記録装置、記録方法 |
Citations (2)
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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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US6678236B1 (en) * | 1999-08-24 | 2004-01-13 | Victor Company Of Japan, Ltd. | Information recording medium method and apparatus for recording and reproducing information |
US7072256B2 (en) * | 2000-03-08 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Information recording medium, information recording method and information reproduction method |
JP3678181B2 (ja) * | 2001-08-08 | 2005-08-03 | ソニー株式会社 | 再生装置および方法、並びにディスク再生装置 |
JP3710790B2 (ja) * | 2003-03-24 | 2005-10-26 | 株式会社リコー | 情報記録方法及びその装置 |
-
2005
- 2005-05-09 JP JP2006513019A patent/JP4138837B2/ja not_active Expired - Fee Related
- 2005-05-09 WO PCT/JP2005/008442 patent/WO2005109430A1/ja active Application Filing
- 2005-05-09 US US11/596,079 patent/US20100014395A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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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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JPWO2005109430A1 (ja) | 2008-03-21 |
US20100014395A1 (en) | 2010-01-21 |
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