WO2006019044A1 - 情報記録媒体、情報記録装置及び方法、情報再生装置及び方法、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、情報再生装置及び方法、並びにコンピュータプログラム Download PDFInfo
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- WO2006019044A1 WO2006019044A1 PCT/JP2005/014814 JP2005014814W WO2006019044A1 WO 2006019044 A1 WO2006019044 A1 WO 2006019044A1 JP 2005014814 W JP2005014814 W JP 2005014814W WO 2006019044 A1 WO2006019044 A1 WO 2006019044A1
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- Prior art keywords
- information
- invisible
- recording
- recorded
- area
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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
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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
Definitions
- Information recording medium information recording apparatus and method, information reproducing apparatus and method, and computer program
- the present invention relates to an information recording medium such as a DVD, an information recording apparatus and method such as a DVD recorder, an information reproducing apparatus and method such as a DVD player, and an information recording apparatus or information reproducing apparatus such as a computer. Relates to the technical field of computer programs that function as
- the content power distributed from Sano such as a dedicated player
- Some types of data are recorded on a hard disk or memory card. At this time, these hard disks should protect the copyright of the content. Copying and moving the content to other information recording media is strictly restricted.
- Patent Document 1 discloses a technique for providing an invisible area on an information recording medium
- Patent Document 2 discloses a technique in which information for security measures is recorded on an information recording medium in an invisible state.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-308617
- Patent Document 2 JP 2001-319339 A Disclosure of the invention
- the present invention has been made in view of, for example, the conventional problems described above, and can record and play back content and the like while suitably protecting the copyright while improving user convenience, for example. It is an object to provide an information recording medium, an information recording apparatus and method, an information reproducing apparatus and method, and a computer program that causes a computer to function as such an information recording apparatus or information reproducing apparatus.
- the information recording medium of the present invention is prerecorded with an invisible area for recording invisible information and a dedicated application for accessing the invisible information recorded in the invisible area. And a visible region.
- invisible information cannot be recorded / reproduced / file-operated by, for example, an operation of a general-purpose application described later! /, Invisible information is recorded in the invisible area.
- a dedicated application for accessing eg, recording, reading, or reproducing
- this invisible information is recorded in advance. That is, if there is no dedicated application (or Invisible information is not accessible unless it is recorded in the visible region.
- the dedicated application is recorded in advance on the information recording medium, the user does not need to install the dedicated application in the information recording apparatus each time recording is performed. For this reason, even if the user or the like does not perform special or special operations for recording and reproducing invisible information, if the information recording medium is loaded into the information recording device, a dedicated application is executed and the invisible information or the like is recorded. And playback. Therefore, it is possible to reduce the burden on the user related to recording and reproduction of invisible information, and as a result, the convenience of the user can be improved.
- the dedicated application is recorded in advance on the information recording medium, it is not always necessary that an application for recording or reproducing invisible information is installed in the information recording apparatus or information reproducing apparatus in advance. Absent.
- the dedicated application is recorded in advance on the information recording medium, invisible information can be recorded or reproduced in various information recording devices and information reproducing devices. Accordingly, the user can record and reproduce invisible information using the same or one information recording medium in various information reproducing apparatuses and information recording apparatuses. For this reason, the portability of the information recording medium between a plurality of information recording devices and a plurality of information reproducing devices can be improved, and the convenience for the user can be further improved.
- the information recording medium of the present invention for example, user convenience is improved.
- invisible information including, for example, content information can be suitably recorded and reproduced while suitably protecting the copyright.
- the invisible information is content information including at least one of video content and audio content.
- encrypted predetermined recording information for example, content information including at least one of video content and audio content
- encrypted information defining the encryption of the content information is recorded as the invisible information.
- the encrypted information recorded as invisible information is read by the operation of the dedicated application, and the encryption of the recorded information can be performed based on the read encrypted information. Since the encrypted recording information can be recorded on the information recording medium, for example, unauthorized duplication of recording information such as content information can be more effectively prevented. Since encryption information used for encryption (or decryption described later) is recorded in an invisible area, unauthorized acquisition or duplication of the encryption information can be effectively prevented. Therefore, it is possible to more suitably and firmly protect the copyright of content information or the like encrypted using the encrypted information.
- the encrypted information may be pre-recorded as the invisible information in the invisible area.
- the dedicated application is set to read only (or reproduction only).
- a dedicated application recorded by embossed pits or the like is used.
- the invisible information for example, content information such as video content and audio content or encrypted information
- the copyright of content information can be suitably protected.
- the invisible information file cannot be manipulated by a predetermined general-purpose operating system in the invisible area.
- a file operation for example, copying, moving, or deleting
- a general-purpose operating system for example, an operating system that is generally used for a PC or the like. Or reference.
- invisible information cannot be recorded or played back. Therefore, invisible information cannot be easily copied by a user operation performed using this general-purpose operating system, and as a result, copyrights of content information and the like can be suitably protected.
- the information recording apparatus of the present invention is prerecorded with an invisible area for recording invisible information and a dedicated application for accessing the invisible information recorded in the invisible area.
- Reading means for reading the dedicated application from the information recording medium (that is, the above-described information recording medium of the present invention (including various aspects thereof)), the invisible information, and the predetermined recording information.
- Recording means for recording at least one of the invisible area and at least one of the visible area, and executing the read dedicated application so that the recording means accesses the invisible area.
- the information recording apparatus of the present invention for example, predetermined recording information or the like can be recorded in the visible region by the operation of the recording means. Further, the dedicated application is read from the visible region by the operation of the reading means. Then, by executing the read dedicated application, the recording unit can record the invisible information in the invisible region while being controlled by the control unit. Therefore, the visible region included in the information recording medium according to the present invention is Various information (for example, invisible information and recorded information) can be suitably recorded in each of the area and the invisible area.
- the recording of invisible information in the invisible area is performed when a dedicated application is executed.
- the invisible information cannot be recorded in the invisible area unless the dedicated application is executed or has the dedicated application.
- the invisible area cannot be accessed unless the dedicated application is executed or has the dedicated application, illegal duplication of invisible information can be effectively prevented. Therefore, according to the information recording apparatus of the present invention, for example, if content information is recorded as invisible information on the information recording medium, the information recording medium according to the present invention is suitably protected while protecting the copyright of the content information and the like. It is possible to suitably record content information and the like.
- the dedicated application is recorded in advance on the information recording medium, the user does not need to install the dedicated application in the information recording apparatus every time it is recorded. That is, when the information recording medium is loaded onto the information recording device, a dedicated application is executed and invisible information and the like are recorded. Accordingly, the burden on the user can be reduced, and convenience can be improved.
- the information recording apparatus of the present invention can also adopt various aspects.
- the recording unit controls the control unit to add content information including at least one of video content and audio content to the invisible region as the invisible information. Record.
- the information recording medium of the present invention in the invisible area, encryption information defining a predetermined encryption is recorded in advance as the invisible information, and the dedicated application is stored in the invisible area.
- the information processing apparatus further includes an acquisition unit that executes the acquisition to acquire the encryption information, and the recording unit, based on the acquired encryption information, records information (for example, at least one of video content and audio content). (Including content information) Record the number.
- recording information such as content information can be encrypted by the operation of the dedicated application.
- the encrypted content information or the like may be recorded as invisible information in an invisible area! /, Or may be recorded as recorded information in a visible area.
- the content information and the like are encrypted and recorded, illegal copying of the content information and the like can be effectively prevented.
- the encryption information is recorded as invisible information, it cannot be easily copied by a user or the like, and as a result, the copyright of the content information can be protected more suitably and firmly. Monkey.
- the recording unit encrypts and records the recording information (for example, content information including at least one of video content and audio content), and Under the control of the control means, encrypted information that defines encryption of the recorded information is recorded in the invisible area as the invisible information.
- the recording information for example, content information including at least one of video content and audio content
- recording information such as content information can be encrypted and recorded by the operation of the dedicated application. Therefore, illegal copying of content information and the like can be more effectively prevented.
- the encrypted information used for encryption (or decryption described later) is recorded in the invisible area, illegal acquisition or duplication of the encrypted information can be effectively prevented. Therefore, it is possible to protect copyrights such as content information more suitably and firmly.
- the information recording method of the present invention includes an invisible area for recording invisible information and a dedicated application for accessing the invisible information recorded in the invisible area.
- a reading step of reading the dedicated application from an information recording medium that is, the above-described information recording medium of the present invention (including various aspects thereof)
- the invisible information and a predetermined area.
- the information recording method of the present invention can also adopt various aspects.
- the information reproducing apparatus of the present invention is prerecorded with an invisible area for recording invisible information and a dedicated application for accessing the invisible information recorded in the invisible area.
- Reading means for reading the dedicated application from the information recording medium that is, the above-described information recording medium of the present invention (including various aspects thereof)
- the invisible information and the predetermined recording information.
- At least one of the invisible region and the visible region is read and played back, and the playback unit accesses the invisible region by executing the read dedicated application.
- the information reproducing apparatus of the present invention it is possible to read and reproduce the recorded information recorded in the visible region by the operation of the reproducing means. Furthermore, the dedicated application is read from the visible region by the operation of the reading means. Then, by executing the read dedicated application, the reproducing means can read and reproduce the invisible information recorded in the invisible area under the control of the control means. Therefore, it is possible to preferably read and reproduce the recorded information and invisible information recorded in the visible area and the invisible area included in the information recording medium according to the present invention.
- the dedicated application Since the dedicated application is recorded in advance on the information recording medium, the user There is no need to install a dedicated application on the information reproducing apparatus every time it is reproduced. That is, when the information recording medium is loaded into the information reproducing apparatus, a dedicated application is executed, and invisible information and the like are read and reproduced. Therefore, the burden on the user can be reduced and the convenience can be improved.
- the information reproducing apparatus of the present invention can also adopt various aspects.
- content information including at least one of video content and audio content is recorded as the invisible information in the invisible region, and the reproducing means Is read from the invisible area and reproduced as the invisible information under the control of the control means.
- the invisible area in the invisible area, encrypted information defining a predetermined encryption is recorded as the invisible information, and the invisible area and the invisible area
- the recorded information (for example, content information including at least one of video content and audio content) is recorded in at least one of the visible areas, and the encrypted information is acquired by executing the dedicated application.
- Acquisition means is further provided, and the reproduction means reads the recorded information and reproduces the read content information based on the acquired encryption key information.
- the content information and the like recorded by encryption can be decrypted and suitably reproduced by the operation of the dedicated application. Furthermore, since the content information and the like are decrypted by the dedicated application, the copyright of the content information and the like can be suitably protected.
- the information reproduction method of the present invention has an invisible area for recording invisible information and a dedicated application for accessing the invisible information recorded in the invisible area in advance.
- a reading step of reading the dedicated application from an information recording medium that is, the above-described information recording medium of the present invention (including various aspects thereof)
- the invisible information and a predetermined area. Small amount of recorded information
- the information reproducing method of the present invention can also adopt various aspects.
- the first computer program causes a computer to function as at least a part of the above-described information recording apparatus (including various forms thereof). Specifically, the computer is caused to function as at least a part of the above-described reading means, recording means, and control means.
- the second computer program of the present invention causes a computer to function as at least a part of the above-described information reproducing apparatus (including various forms thereof). Specifically, the computer is caused to function as at least a part of the above-described reading means, reproducing means, and control means.
- each computer program if the computer program is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program and then executed by the computer.
- a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program and then executed by the computer.
- the computer program is downloaded to a computer via communication means and then executed, the above-described information recording apparatus or information reproducing apparatus of the present invention can be realized relatively easily.
- each computer program of the present invention can also adopt various aspects.
- a first computer program product in a computer-readable medium is a program instruction executable by a computer provided in the above-described information recording device (including various aspects thereof) in order to solve the above-described problem.
- Clearly embodying the computer It functions as at least a part of the reading means, recording means and control means described above.
- the second computer program product in the computer-readable medium is a program instruction executable by a computer provided in the above-described information reproducing apparatus (including various aspects thereof). Is clearly implemented, and the computer is caused to function as at least part of the reading means, the reproducing means, and the control means.
- each computer program product of the present invention if the computer program product is read into a computer from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product, or
- a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product
- the computer program product which is a transmission wave
- the computer program product which is a transmission wave
- the computer program product may be configured with a computer-readable code (or computer-readable instructions) that functions as the information recording apparatus or information reproducing apparatus of the present invention described above. .
- the information recording medium of the present invention it is provided with a visible region and an invisible region. Therefore, it is possible to record and play back content and the like while suitably protecting the copyright while enhancing the convenience for the user.
- the information recording apparatus or method of the present invention comprises a reading means, a recording means and a control means, or a reading process, a recording process and a control process. Therefore, it is possible to record content and the like while suitably protecting the copyright while improving the convenience for the user.
- the information reproducing apparatus or method of the present invention comprises a reading means, a reproducing means and a control means, or a reading process, a reproducing process and a control process. Therefore, it is possible to reproduce contents and the like while suitably protecting the copyright while improving the convenience for the user.
- FIG. 1 Area distribution on an optical disc as an embodiment of the information recording medium of the present invention
- FIG. 2 is an explanatory diagram showing whether or not access to the optical disk according to the present embodiment is possible for each operating system and application.
- FIG. 3 is a data structure diagram conceptually showing a logical data structure of the entire optical disc according to the present embodiment.
- FIG. 4 is a data structure diagram conceptually showing a data structure in an invisible area in the optical disc in the example.
- FIG. 5 is a data structure diagram conceptually showing the data structure of area management information recorded on the optical disc in the example.
- FIG. 6 is a plan view conceptually showing an aspect of area distribution on an optical disc according to a modification of the embodiment of the information recording medium of the present invention.
- FIG. 7 is an explanatory diagram schematically showing an aspect during recording and reproduction of content data on an optical disc according to a modification.
- FIG. 8 is a block diagram of an information recording / reproducing apparatus and a host computer as a first embodiment according to the information recording apparatus of the present invention.
- FIG. 9 is a flowchart conceptually showing a flow of the entire recording operation in the first operation example of the information recording / reproducing apparatus in the example.
- FIG. 10 is a flowchart conceptually showing a flow of the entire reproducing operation in the first operation example of the information recording / reproducing apparatus in the example.
- FIG. 11 is a flowchart conceptually showing a flow of the entire recording operation in the second operation example of the information recording / reproducing apparatus in the example.
- FIG. 12 is a flowchart conceptually showing a flow of the entire reproducing operation in the second operation example of the information recording / reproducing apparatus in the example.
- FIG. 1 is a plan view conceptually showing an aspect of area distribution on the optical disc according to the present embodiment
- FIG. 2 shows whether or not the optical disk according to the present embodiment is accessible. It is an explanatory diagram for each system and application.
- the optical disc 100 can be recorded by various recording methods such as a magneto-optical method and a phase change method, in which recording (writing) can be performed multiple times or only once. It is said that As with DVDs, etc., a visible area 104 and an invisible area 106 are provided on the recording surface of the disc body having a diameter of about 12 cm.
- the visible area 104 is a recording area that can be accessed by the operation of a general-purpose operating system (or a file system operating on a general-purpose operating system) that operates on a PC, for example.
- a general-purpose operating system or a file system operating on a general-purpose operating system
- the data can be recorded in the visible area 104 by the operation of a general-purpose operating system, the data recorded in the visible area 104 is reproduced, and the operation of the data recorded in the visible area 104 (for example, copying (copy P), move, delete, reference, etc.).
- a dedicated application 111 that can access the invisible area 106 is recorded in advance. That is, the dedicated application 111 that can record data in the invisible area 106, play back the data recorded in the invisible area 106, and operate the data recorded in the invisible area 106 is recorded in advance. Yes.
- the invisible area 106 is a recording area that cannot be accessed by the operation of the above-described general-purpose operating system or the like. In other words, it is a recording area in which data cannot be recorded by the operation of a general-purpose operating system, data cannot be reproduced, and data cannot be manipulated.
- the invisible area 106 is a recording area that can be accessed by the operation of the dedicated application 111 recorded in the visible area 104. Therefore, the invisible area 106 may be managed in a unique format conforming to the dedicated application 111.
- the visible area 104 and the invisible area 106 are accessed by the operations of a general-purpose operating system and the like and the dedicated application 111, respectively.
- the visible area 104 can be accessed and the invisible area 106 can be accessed. That is, in the invisible area 106, data cannot be directly recorded or reproduced by the operation of a general-purpose operating system, but is read and executed by the operation of a general-purpose operating system, for example.
- the dedicated abrasion 111 data can be recorded or reproduced.
- Content data cannot be accessed due to the operation of a general-purpose operating system used for PCs.
- content data is recorded in the invisible area 106. Recording cannot be performed by the operation of a general-purpose application or the like. Therefore, unauthorized duplication of content data performed by the user using a general PC or the like can be suitably prevented. As a result, it is possible to suitably protect the copyright of the content data.
- the dedicated application 111 recorded in the visible area 104 is read by the operation of a general-purpose operating system or the like and then executed, it is recorded in the invisible area 106 using a general PC or the like. Content data can be suitably played back. If this dedicated application 111 is executed, the content data can be recorded in the invisible area 106. Therefore, if the optical disc 100 is recorded with the dedicated application 111, the user can preferably record and reproduce the content data while suitably protecting the copyright of the content data as described above.
- the dedicated application 111 is pre-recorded on the optical disc 100, an application for recording or reproducing content data may be used as an information recording device or information reproducing device (or information recording / reproducing device). It is not always necessary to install it in advance on the device.
- the dedicated application 111 is pre-recorded on the optical disc 100, content data can be recorded or reproduced on various information recording devices and information reproducing devices (or information recording / reproducing devices, etc.). Is possible.
- the content data recorded by the operation of the dedicated application 111 executed on a PC or the like is used for an information reproducing device (for example, a DVD player included in a navigation device or the like) mounted on a private car or the like.
- Playback can be performed by the operation of the executed dedicated application 111. Therefore, the user can record and reproduce content data using one optical disc 100 in various information reproducing apparatuses and information recording apparatuses (or information recording and reproducing apparatuses). For this reason, the portability of the optical disk 100 can be improved and the convenience of the user can be improved.
- the dedicated application 111 is recorded on the optical disc 100 in advance, it is not necessary for the user to install the dedicated application 111 on the PC! For this reason, for example, if the user loads the optical disc 100 onto a PC or the like, for example, Application is automatically executed, content data can be recorded in the invisible area 106, and content data recorded in the invisible area 106 can be reproduced. For this reason, it is not necessary for the user or the like to perform extra or special operations for recording or reproducing the content data, and the convenience of the user can be greatly improved.
- the above-described configuration can be employed using a widely spread optical disc such as a CD or a DVD. Therefore, content data can be recorded and played back using, for example, a general CD player Z recorder or DVD player Z recorder without using a dedicated player Z recorder used for content distribution, for example. be able to. Therefore, it does not place a burden on the user to purchase a dedicated player Z recorder, so that the content distribution service can be widely or explosively spread.
- the dedicated application 111 is preferably recorded in a reproduction-only state (or a read-only state). That is, it is preferable that the dedicated application 111 is recorded so that it cannot be recorded or rewritten by the operation of a general-purpose application, for example.
- a part of the visible area 104 is set as a recording area dedicated for playback, and the dedicated application 111 is recorded using embossed pits! It's okay.
- the dedicated application 111 cannot be tampered with illegally, and as a result, the dedicated application 111 that has been tampered with illegally prevents content data recorded in the invisible area 106 from being illegally copied. be able to. Therefore, the copyright of the content data can be protected more suitably.
- the invisible area 106 can be recorded a plurality of times. This makes it possible to record a plurality of content data in the invisible area 106 a plurality of times, and does not place a burden on the user to purchase a new optical disc 100 each time the content data is recorded. Therefore, user convenience can be further improved.
- the sizes of the visible area 104 and the invisible area 106 are arbitrary, and may be appropriately changed according to data recorded therein.
- the visible area 104 has a dedicated area. It may be configured so that only the application 111 is recorded, or it may be configured to record other data.
- the content data is not easily copied or moved by the operation of the dedicated application 111 based on the user's instruction. That is, even if the dedicated application 111 can perform operations on the content data recorded in the invisible area 106, it is preferable that these operations are not easily performed by the user. Even if the content data can be copied or moved by the operation of the dedicated application 111 based on the user's instruction, the measures to appropriately protect the copyright of the content data can be ensured. U, prefer to be made.
- the content data is not limited to movie content or music content, but may be PC data such as word processor data and drawing data, for example. Or other various data! /.
- the content data has a misaligned format! /, Which can improve the convenience of the user while protecting the copyright of the content data. it can.
- FIG. 3 is a data structure diagram conceptually showing the logical data structure of the entire optical disk 100
- FIG. 4 is a data structure diagram conceptually showing the data structure in the invisible area 106
- FIG. 5 is a data structure diagram conceptually showing the data structure of the area management information recorded on the optical disc 100.
- the optical disc 100 is an OS (Operating System) management area 114 that is managed by a general-purpose operating system (that is, capable of recording / playback 'operation etc. by a general-purpose operating system). It has a multi-volume structure including volume # 1 and volume # 2, which is an OS non-management area 116 that is not managed by a general-purpose operating system. Further, it may include a plurality of volumes #n (where n is a natural number), each of which is an OS management area 114 and an OS non-management area 116.
- OS management area 114 corresponds to the above-mentioned visible area 104, and OS non-management area 116 is invisible above. Corresponds to area 106.
- the OS non-management area 116 records the above-described content data and the like, and area management information for managing the physical address and the like of the content data on the optical disc 100, etc. . Therefore, access to the invisible area 106 by the dedicated application 111 is obtained by accessing the area management information, obtaining the physical address of the content data, and accessing the location indicated by the physical address. To do. At this time, since area management information is recorded in the OS non-management area 116, the dedicated application needs to recognize the physical address of the area management information in advance.
- the area management information may be recorded in the OS management area 114 corresponding to the visible area 104.
- content data and the like are recorded in the OS non-management area 116 corresponding to the invisible area 106. Then, the access to the content data by the operation of the dedicated application 111 is performed in the same manner as in FIG.
- the area management information includes data tags # 1 to #m (where m is an integer of 2 or more) and data tags # 1 to #m for identifying each content data. And an information management table including physical addresses corresponding to the respective addresses.
- the optical disc 100 can be realized even if the multi-volume structure described with reference to FIGS. 3 to 5 is not provided.
- a file system that operates on a general-purpose operating system may be configured to set a flag that makes a predetermined recording area invisible from a general-purpose operating system (or from a general-purpose application).
- the optical disc 100 including the visible area 104 and the invisible area 106 may be realized.
- the predetermined recording area in which the invisible flag is set corresponds to the invisible area 106
- the other recording areas correspond to the visible area 104.
- FIG. 6 is a plan view schematically showing an aspect of area distribution on the optical disc according to the modified example
- FIG. 7 is a diagram of content data to the optical disc according to the modified example. It is explanatory drawing which shows notionally the aspect at the time of recording and reproduction
- the optical disc 100a according to the modified example includes a visible area 104 and an invisible area 106, and is invisible to the visible area 104, like the optical disc 100 according to the above-described embodiment.
- a dedicated application 111 capable of accessing the area 106 is recorded in advance.
- the invisible area 106 is an encryption that constitutes a specific example of "encrypted information" of the present invention that defines encryption and decryption of content data recorded in the invisible area 106.
- Key 112 is recorded.
- the encryption key 112 may be recorded in advance before the content data is recorded (that is, at the time of distribution of the optical disc 100a, for example), or may be recorded when the content data is recorded or after it. .
- the encryption key 112 is preferably recorded in a read-only state using, for example, an emboss pit. Further, when the content data is recorded or later, the encryption key 112 distributed from the content server or the like may be recorded, for example.
- the encryption key 112 is acquired by the operation of the dedicated application 111 as shown in FIG.
- Content data to be encrypted is encrypted using the encryption key 112.
- the encryption of the content data is performed by an encryptor that operates the dedicated application 111.
- the content data encrypted by the operation of the dedicated application 111 is recorded in the invisible area 106.
- the encryption key 112 may be transmitted to a content server or the like, and the content data encrypted on the content server side using the transmitted encryption key 112 may be distributed.
- the encryption key 112 may be recorded in advance, and when recording content data on the optical disc 100a, the encryption key 112 may be obtained from, for example, a content server by the operation of the dedicated application 111. .
- the encryption key 112 is obtained by the operation of the dedicated abrasion 111, as shown in FIG. 7 (b). Then, the content data decrypted using the encryption key 112 is reproduced. Decryption of this content data is a dedicated application This is done by the decoder on which the case 111 operates.
- the content data can be encrypted and recorded or distributed, so that the copyright of the content data can be more suitably protected.
- the encryption key 112 is recorded in the invisible area 106, it is not easily obtained by the user (or by a general-purpose operating system or the like). For this reason, it is possible to effectively prevent inconvenience that the encryption key 112 is illegally obtained, and it is possible to more appropriately protect the copyright of the content data.
- the dedicated application 111 performs processing related to encryption or decryption, the user or the like is allowed to perform an extra or special operation for content data encryption or decryption. There is no need. For this reason, it is possible to greatly improve user convenience.
- the content data that is encrypted and recorded is not duplicated or moved by the operation of an application other than the dedicated application 111 (for example, a general-purpose operating system). Therefore, the encryption key 112 can have a unique or unique (ie, closed) relationship with the optical disc 100a (more specifically, the dedicated application 111 recorded on the optical disc 100). That is, a different encryption key 112 can be recorded for each optical disc 100.
- the content data may be recorded in the visible area 104 which is not necessarily recorded in the invisible area 106. That is, even if only the content data recorded in the visible area 104 is illegally copied, the content data cannot be reproduced unless the encryption key 112 recorded in the invisible area 106 is acquired. Therefore, even if the content data is recorded in the visible area 104, the copyright of the content data can be suitably protected.
- the optical disc 100 according to the present embodiment and the optical disc 100a according to the modification are not limited to the optical discs of the recording layer and the force layer, and are two-layer one side (ie, dual layer) or two-layer both sides (ie, dual layer). Layer double side). Furthermore, it is not limited to an optical disc having two recording layers, and may be a multilayer optical disc having three or more layers. This place In this case, each recording layer may be configured to have both the visible area 104 and the invisible area 106, or the recording area may be either one of the visible area 104 and the invisible area 106. It may be configured as ⁇ .
- FIG. 8 is a block diagram of the information recording / reproducing apparatus and the host computer according to the present embodiment.
- the information recording / reproducing apparatus 300 has a function of recording record data on the optical disc 100 and a function of reproducing the record data recorded on the optical disc 100.
- the information recording / reproducing apparatus 300 includes an optical disc 100, a spindle motor 351, an optical pickup 352, a signal recording / reproducing means 353, a CPU (drive control means) 354, a memory 355, and data input / output.
- a control means 306 and a bus 357 are provided.
- the host computer 400 includes a CPU 359, a memory 360, an operation Z display control unit 307, an operation button 310, a display panel 311, and a data input / output control unit 308.
- the spindle motor 351 rotates and stops the optical disc 100, and operates 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 from a servo unit (not shown) or the like.
- the optical pickup 352 includes, for example, a semiconductor laser device and a lens in order to perform recording / reproduction on the optical disc 100. More specifically, the optical pickup 352 irradiates the optical disc 100 with laser light at the first power as reading light at the time of reproduction, and irradiates the recording light at the second power with modulation at the second power at the time of recording.
- the signal recording / reproducing means 353 constitutes one specific example of “reading means”, “recording means”, and “reproducing means” in the present invention, and controls the spindle motor 351 and the optical pickup 352 to control the optical disc. Record and play back to 100. More specifically, signal recording and playback
- the means 353 includes, for example, a laser diode (LD) driver and a head amplifier.
- the laser diode 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 laser beam, and outputs the amplified signal.
- the signal recording / reproducing means 353, in the OPC (Optimum Power Control) process operates under the control of the CPU 354, along with a timing generator (not shown), etc.
- a semiconductor laser (not shown) provided in the optical pickup 352 is driven so that the determination can be made.
- the memory 355 includes general data processing and OPC in the information recording / reproducing apparatus 300, such as a buffer area for recording / reproducing data and an area used as an intermediate buffer when converted to data used by the signal recording / reproducing means 353. Used in processing.
- the memory 355 has a program for operating as a recorder device, that is, a ROM area in which firmware is stored, a buffer for temporarily storing recording / playback data, a variable necessary for the operation of the firmware program, and the like.
- the RAM area to be stored is configured.
- the CPU (drive control means) 354 constitutes one specific example of the “control means” in the present invention, and is connected to the signal recording / reproducing means 353 and the memory 355 via the bus 357, and various control means.
- the information recording / reproducing apparatus 300 is controlled as a whole. Normally, software or firmware for operating the CPU 354 is stored in the memory 355.
- the data input / output control means 306 controls external data input / output to / from the information recording / reproducing apparatus 300, and stores and retrieves data in / from the data buffer on the memory 355.
- the drive control command issued from the external host computer 400 (hereinafter referred to as a host as appropriate) is connected to the information recording / reproducing apparatus 300 via an interface such as SCSI or ATAPI. Is transmitted to the CPU 354 via Similarly, the recorded / reproduced data is exchanged with the host computer 400 via the data input / output control means 306.
- Operation Z display control means 307 receives and displays an operation instruction for the host computer 400. For example, an instruction by the operation button 310 such as recording or reproduction is given to the present invention. This is sent to the CPU 359 that constitutes a specific example of the “control means”.
- the CPU 359 transmits a control command (command) to the information recording / reproducing apparatus 300 via the data input / output means 308 based on the instruction information from the operation Z display control means 307, and the information recording / reproducing apparatus 300 as a whole. To control.
- the CPU 359 can transmit a command requesting the information recording / reproducing apparatus 300 to transmit the operation state to the host computer 400.
- the CPU 359 can display the information recording / reproducing apparatus 300 on the display panel 311 such as a fluorescent tube or LCD via the operation / display control means 307.
- the operating state can be output.
- the memory 360 is an internal storage device used by the host computer 400.
- a ROM area in which a firmware program such as BIOS (Basic Input / Output System) is stored, an operating system, an operation of an application program, etc.
- BIOS Basic Input / Output System
- the RAM area that stores the necessary variables is also configured. Also, it is not shown in the figure via the data input / output control means 308, and may be connected to an external storage device such as a node disk.
- One specific example in which the information recording / reproducing apparatus 300 and the host computer 400 described above are used in combination is a household device such as a recorder device that records and reproduces video.
- This recorder device is a device that records video signals from broadcast receiver tuners and external connection jacks on a disc, and outputs the video signals reproduced from the disc to an external display device such as a television.
- the program stored in the memory 360 is executed by the CPU 359 to operate as a recorder device.
- the information recording / reproducing apparatus 300 is a disk drive (hereinafter referred to as a drive as appropriate)
- the host computer 400 is a personal computer workstation. Host computer such as a personal computer 40
- the disk drive are connected via data input / output control means 306 and 308 such as SCSI and ATAPI, and control application disk drives such as writing software installed in the host computer 400.
- data input / output control means 306 and 308 such as SCSI and ATAPI
- control application disk drives such as writing software installed in the host computer 400.
- FIG. 9 is a flowchart conceptually showing the overall flow of the recording operation in the first operation example
- FIG. 10 is a reproduction operation in the first operation example. It is a flowchart which shows the whole flow notionally.
- the content data is recorded in the invisible area 106 by executing the dedicated application 111 recorded in the visible area 104 as described with reference to FIGS. It also relates to the operation of playing this content data.
- the optical disc 100 is loaded onto the information recording / reproducing apparatus 300 (step S 101).
- control information for controlling the recording operation for example, write strategy
- OPC Optimum Power Control
- Step S102 the dedicated application 111 is read by the operation of a general-purpose operating system. Then, the read dedicated application is executed on a general-purpose operating system (particularly, on a general-purpose operating system operating on the CPU 354 or the CPU 359).
- content data is downloaded by transmitting a download request from the information recording / reproducing apparatus 300 to a content server or the like, for example (step S102).
- the content data may be downloaded while being encrypted in accordance with a standard such as SSL (Secure Socket Layer).
- SSL Secure Socket Layer
- the content data download itself may be performed by the operation of the dedicated application 111 or may be performed by the operation of another download application (or a general-purpose operating system).
- step S104 the content data downloaded in step S103 is recorded in the invisible area 106 of the optical disc 100 by the operation of the dedicated application (step S104).
- step S105 it is determined whether or not the force is sufficient to end the recording operation. For example, if all the content data to be recorded (that is, all the content data downloaded in step S103) is recorded, it will be determined that the process will be terminated, and the user will be instructed to stop recording. May be determined to end. As a result of this determination, if it is determined not to end the recording operation (step S 105: No), the process returns to step S 104 again to continue the recording operation. On the other hand, if it is determined that the recording operation is to be ended (step S105: Yes), the recording operation is ended, and finalization processing of the optical disc 100 is performed as necessary, or the optical disc 100 is recorded on the information recording / reproducing device 300. You may eject more.
- the optical disc 100 is loaded onto the information recording / reproducing apparatus 300 (step S 101).
- the dedicated application 111 recorded in the visible area 104 is read (step S102).
- the read dedicated application is executed on a general-purpose operating system (in particular, on a general-purpose operating system operating on the CPU 354 or the CPU 359).
- step S 201 the content data recorded in the invisible area 106 is read and reproduced by the operation of the read dedicated application 111. That is, the content data is reproduced by the operation of the dedicated application 111.
- step S202 it is determined whether or not the power is sufficient to end the reproduction operation. For example, it may be determined that the playback operation is ended when all the content data to be played back has been completed, or it may be determined that the playback operation is ended when the user gives an instruction to stop playback.
- step S 202 determines whether it is determined not to end the reproduction operation (step S 202: No). If it is determined that the reproduction operation is to be terminated (step S202: Yes), the reproduction operation is terminated, and the optical disc 100 may be ejected from the information recording / reproducing apparatus 300 as necessary.
- the downloaded content data is recorded in the invisible area 106, it is possible to suitably prevent unauthorized duplication of the content data performed by the user using a general PC or the like. as a result The copyright of the content data can be suitably protected.
- the content data recorded in the invisible area 106 can be suitably reproduced by the operation of the dedicated application 111.
- the dedicated application 111 is pre-recorded on the optical disc 100, content data can be recorded or reproduced on various information recording devices and information reproducing devices (or information recording / reproducing devices, etc.). can do. Therefore, the user can record and reproduce content data recorded on one optical disc 100 in various information reproducing apparatuses and information recording apparatuses (or information recording / reproducing apparatuses). Further, it is not necessary for the user or the like to perform extra operations for recording or reproducing the content data, and the convenience for the user can be greatly improved.
- FIG. 11 is a flowchart conceptually showing the flow of the entire recording operation in the second operation example
- FIG. 12 is a flowchart conceptually showing the flow of the entire reproducing operation in the second operation example.
- the content data encrypted using the encryption key 112 recorded in the invisible area 106 is recorded on the optical disc 100.
- the present invention also relates to an operation for decrypting and reproducing the encrypted content data.
- the same step numbers are assigned to the same operations as those in the first operation example, and the detailed description thereof is omitted.
- the optical disc 100a is loaded onto the information recording / reproducing apparatus 300 (step S101). Subsequently, the dedicated application 111 recorded in the visible area 104 is read (step S102).
- step S301 it is determined whether or not the encryption key 112 is recorded on the optical disc 100a (particularly, the invisible area 106) by the operation of the dedicated application 111.
- step S301 determines that the encryption key 112 is recorded and not (step S301: No)
- an instruction to generate the encryption key 112 is transmitted to, for example, a content server or the like.
- the encryption key 112 is generated in the content server or the like (step S302). ) o
- information specific to the optical disc 100a loaded on the information recording / reproducing apparatus 300 (or information specific to the dedicated application 111 recorded on the optical disc 100a) is transmitted to the content server or the like. It is preferable.
- the content data is encrypted on the content server side based on the encryption key 112 generated in step S302 (step S303). Then, the encrypted content data is downloaded to the information recording / reproducing apparatus 300 (step S 103). At this time, configure the encrypted content data so that it can be further encrypted and downloaded in compliance with SSL.
- step S302 is downloaded to the information recording / reproducing apparatus 300 (step S304). Then, the encryption key 112 downloaded in step S304 is recorded in the invisible area 106 of the optical disc 100a by the operation of the dedicated application 111 (step S305). Thereafter, the encrypted content data is recorded in the invisible area 106 of the optical disc 100a by the operation of the dedicated application 111 (step S104).
- step S301 if it is determined that the encryption key 112 has already been recorded (step S301: Yes), then the encryption key 112 recorded in the invisible area 106 is uploaded to a content server, for example. It is determined whether or not it is forceful (step S306). That is, it is determined whether or not the content data is encrypted on the content server side or whether the content data is encrypted on the information recording / reproducing apparatus 300 side. When content data encryption is performed on the content server side, the encryption key 112 is uploaded. When content data encryption is performed on the information recording / reproducing apparatus 300 side, the encryption key 112 is uploaded. What! /
- step S 306 If it is determined that the encryption key 112 has not been uploaded as a result of this determination (step S 306: No), the content data is not encrypted using the encryption key 112, and the content data is recorded in the information recording / reproducing apparatus 300. (Step S103).
- the content key may be downloaded without using the encryption key 112 in accordance with, for example, SSL.
- the dedicated application 111 operates to The content data is encrypted on the information recording / reproducing apparatus 300 side using the encryption key 112 recorded in the invisible area 106 of the disc 100a (step S308). Thereafter, the encrypted content data is recorded in the invisible area 106 of the optical disc 100a by the operation of the dedicated application 111 (step S104).
- step S306 if it is determined that the encryption key 112 is uploaded (step S306: Yes), the operation of the dedicated application 111 causes the encryption key 112 recorded in the invisible area 106 of the optical disc 100a to be recorded / reproduced. Uploaded from the device 300 to a content server or the like (step S307).
- Content data is encrypted on the content server side based on the encryption key 112 uploaded in step S305 (step S303). Then, the encrypted content data is downloaded to the information recording / reproducing apparatus 300 (step S 103). At this time, the content data encrypted according to SSL or the like may be further encrypted and downloaded. Thereafter, the encrypted content data is recorded in the invisible area 106 of the optical disc 100a by the operation of the dedicated application 111 (step S104).
- step S105 it is determined whether or not the force is sufficient to end the recording operation. As a result of this determination, if it is determined not to end the recording operation (step S105: No), the process returns to step S104 again to continue the recording operation. On the other hand, if it is determined that the recording operation is to be terminated (step S105: Yes), the recording operation is terminated and the optical disc 100 is finalized as necessary, or the optical disc 100 is recorded on the information recording / reproducing apparatus 300. Make it more ejected.
- the content data encrypted as described above is not necessarily recorded in the invisible area 106.
- the encrypted content visible area 104 may be recorded.
- step S301 Even if it is determined that the encryption key 112 is recorded in the invisible area 106 of the optical disc 100a (step S301: Yes), the encryption key 112 is generated on the content server side (step S301). S302), the content data may be encrypted using the generated encryption key 112. In this case, the encryption generated on the content server side The key 112 is overwritten on the invisible area 106.
- the optical disc 100 is loaded onto the information recording / reproducing apparatus 300 (step S 101). Subsequently, the dedicated application 111 recorded in the visible area 104 is read (step S102).
- the content data recorded in the invisible area 106 is read by the operation of the read dedicated application 111 (step S401). Further, by the operation of the read dedicated application 111, the encryption key 112 recorded in the invisible area 106 is read (step S402).
- step S403 it is determined whether or not the encryption key read in step S402 is valid for the content data read in step S401 (step S403).
- the B note key 112 read in step S402 and the content data read in step S401 V correspond appropriately, or in step S402! / It is determined whether or not the content data read in step S401 can be properly decrypted using the read encryption key 112 in step S401. If it is not properly handled or if it cannot be properly decrypted, it is determined that it is not valid.
- step S403 determines whether the content is valid (step S403: No)
- the content data cannot be decrypted and played back, so the playback operation ends.
- it may be configured to display a screen indicating that the encryption key 112 and the content data correspond to! /, NA! /, On the display or the like.
- step S403 if it is determined to be valid (step S403: Yes), the operation of the dedicated application 111 uses the encryption key 112 read in step S402 by the operation of the dedicated application 111 to step S401! The read content data is decrypted (step S404). Then, the decrypted content data is reproduced by the operation of the dedicated application 111 (step S201).
- step S202 it is determined whether or not the power to end the reproduction operation is satisfied. As a result of this determination, if it is determined not to end the playback operation (step S202: No), step S2 is performed again. Return to 01 and continue playback. On the other hand, if it is determined that the reproduction operation is to be terminated (step S202: Yes), the reproduction operation is terminated, and the optical disc 100 may be ejected from the information recording / reproducing apparatus 300 as necessary.
- the second operation example it is possible to receive the same benefits as the various benefits of the first operation example described above.
- the content data can be encrypted and recorded or distributed, the copyright of the content data can be more suitably protected.
- the encryption key 112 is recorded in the invisible area 106, it is not easily obtained by the user (or by a general-purpose operating system or the like). For this reason, it is possible to effectively prevent inconvenience that the encryption key 112 is illegally acquired, and it is possible to more suitably protect the copyright of the content data.
- the dedicated application 111 performs processing related to encryption or decryption, the user or the like performs extra or special operations for content data encryption or decryption. There is no need to let For this reason, it is possible to greatly improve user convenience.
- the optical disk 100a itself may be used. It may be configured to be used as an encryption key. That is, by the operation of the dedicated application 111 on the optical disc 100a, the content data is encrypted using the encryption key 112 recorded in the invisible area 106, and the encrypted content data is recorded on a node disc or the like. You may comprise. In order to reproduce this content data, the encryption key 112 recorded in the invisible area 106 of the optical disc 100 is used by the operation of the dedicated application 111 executed by loading the optical disc 1 OOa into the information recording / reproducing apparatus. The content data recorded on the hard disk may be decrypted, and the decrypted content data may be reproduced. In other words, it may be configured such that recording and playback of content data and the like is performed only when the optical disk and the hard disk are combined.
- the optical disc 100 is described as an example of the information recording medium, and the recorder and player related to the optical disc 100 are described as an example of the information recording device.
- the present invention is not limited to optical discs and their recorders, but can be applied to other high-density recording or various information recording media compatible with high transfer rates and their recorders and players.
- the present invention is not limited to the above-described embodiments, but can be appropriately changed within the scope of the claims and the entire specification without departing from the gist or concept of the invention which can be read.
- a medium, an information recording apparatus and method, an information reproducing apparatus and method, and a computer program for recording control or reproduction control are also included in the technical scope of the present invention.
- the information recording medium, the information recording apparatus and method, the information reproducing apparatus and method, and the computer program according to the present invention can be used for a high-density optical disk such as a DVD. It can be used for an information recording / reproducing apparatus. Further, for example, the present invention can be used for an information recording / reproducing apparatus or the like that is mounted on or can be connected to various computer equipment for consumer use or business use.
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Abstract
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JPH06274419A (ja) * | 1993-03-23 | 1994-09-30 | Mitsubishi Kasei Corp | 情報記録媒体及びそのデータの記録方法 |
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WO2000079532A1 (fr) * | 1999-06-23 | 2000-12-28 | Mitsubishi Chemical Corporation | Support d'enregistrement, procede d'initialisation de support d'enregistrement, procede de cryptage et dispositif pour support d'enregistrement, procede de decryptage et dispositif acoustique/video/donnees |
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JP2002229859A (ja) * | 2001-01-31 | 2002-08-16 | Toshiba Corp | ディスク記憶装置及び同装置に適用する認証方法 |
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JPH06274419A (ja) * | 1993-03-23 | 1994-09-30 | Mitsubishi Kasei Corp | 情報記録媒体及びそのデータの記録方法 |
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JP2002229859A (ja) * | 2001-01-31 | 2002-08-16 | Toshiba Corp | ディスク記憶装置及び同装置に適用する認証方法 |
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