JP2006120218A - Device for recording content - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable content, which is not allowed to be copied, to be moved to other medium in a write once read many type medium without a data erasing means. <P>SOLUTION: After temporarily holding all the data, as a move target, inside a recording device in an original format which can not be analyzed by other devices, the write once read many type medium as the origin of the move is destroyed and the data is then written in a medium as a destination of the move. Retry processing can be executed in write failure to the medium via the intermediate data in addition to prevent illegitimately taking out the data, which is not allowed to be copied, because of holding the data in the original format. Although associated with the destruction of the medium as the origin of the move, it is effective to prevent the failure in the move processing because the retry processing in write processing can be achieved while copyright protection is maintained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a content recording apparatus that moves content with a copy-inhibited attribute.

  In recent years, with the advancement of digital technology from tape-like media represented by VHS (registered trademark) to disc-like media such as DVD (Digital Versatile Disc), image quality, sound quality, etc. have deteriorated during content copying. Various copyright protection technologies have been established from the viewpoint of copyright protection for content holders.

  One of the technologies is CGMS (Copy Generation) for controlling whether or not a recording apparatus of a content can record in a recording apparatus and recording from a recording apparatus to another recording apparatus over two generations. There is a technology called “Management System”. As a result, attributes such as “copying allowed”, “copying for only one generation”, and “copying impossible” are added to the content to be transmitted.

  When content broadcasted with the above technology “only one generation can be copied” is recorded on, for example, an HDD (Hard Disk Drive), the content becomes “not copyable” under the control of CGMS in the HDD, and the content is further copied. Is prevented. On the other hand, the HDD is not suitable for long-term storage from the viewpoint of the life and reliability of the recording medium, so that the content is different from other media (for example, DVD-RAM and DVD-R) capable of copyright management. The user is provided with the ability to “move” instead of “copy”.

  Unlike the copy process, the move process is characterized in that the contents of the move source are deleted after the move process. Therefore, the total number of contents does not increase or decrease before and after the move process, and the attributes of the contents of the move destination medium Since “Copy is not allowed”, further copying to other media is not possible, and copyright protection is maintained. It also serves the purpose of storing content on the user's other media.

  However, media such as DVD-RAM and DVD-R also deteriorate over time due to various factors such as light, heat, and chemical changes, and eventually data cannot be read.

  Contents recorded on media such as HDDs and optical discs have aspects such as cultural assets in addition to their meaning as personal assets, and technology has been established for transferring to other media before data can no longer be read. This is a social request.

As a technique related to this measure, there is a method of making it possible to move data between recording media (such as HDD and MD) while maintaining copyright protection. This method is realized by distinguishing between copying and moving operations by detecting whether or not data can be erased on the recording medium of the moving source.
JP 2004-54988 A

  However, in a write-once medium such as a DVD-R, data erasing means has not been established, and a content that cannot be copied cannot be transferred to another medium by the conventional movement method. That is, the problem to be solved by the present invention is that a non-copyable content recorded on a write-once medium cannot be transferred to another medium.

  In order to solve the above problems, the present invention provides reading means for reading data from a first recording medium on which non-copyable content is recorded, and disabling means for destroying the first recording medium and making it unreadable. Conversion means for converting the data read by the reading means into data that cannot be analyzed by another device, and the data converted into the original content by restoring the data converted by the conversion means to the second medium capable of copyright management And writing means for writing.

  As a result, the main feature is the establishment of a configuration for carrying out transfer processing that involves irreversible destruction of media in a form that does not impair the protection of copyright protection and the convenience of user content management.

  The content recording apparatus of the present invention temporarily holds all data to be moved in a recording apparatus in a unique format that cannot be analyzed by other devices, and then destroys the write-once medium at the movement source, and then moves to the destination medium. Write to. Since the data is held in a unique format, it is possible to prevent unauthorized copying of uncopyable data, and it is possible to perform a retry process when writing to the medium fails through the intermediate data. Although this involves the destruction of the transfer source medium, the retry process of the write process is realized while maintaining the copyright protection, so that the effect of preventing the transfer process from failing can be obtained.

  According to the first aspect of the present invention, there is provided reading means for reading data from a first recording medium on which non-copyable contents are recorded, and disabling means for destroying the first recording medium and making it unreadable. And conversion means for converting the data read by the reading means into data that cannot be analyzed by other devices, and restoring the original content to the data converted by the conversion means to a second medium capable of copyright management And writing means for writing data.

  The invention according to claim 2 is a reading means for reading data from a first recording medium on which non-copyable content is recorded, a disabling means for destroying the first recording medium and making it unreadable, Conversion means for converting the data read by the reading means into data that cannot be analyzed by another device, and the data converted by the conversion means is restored to the original content and the data is written to a second medium capable of copyright management Writing means, wherein the reading means reads data from the first recording medium and converts it into data that cannot be analyzed by another device, and the disabling means makes the first recording medium unreadable, The writing means restores data that cannot be analyzed in the other format to the original data and writes it to the second recording medium.

  According to a third aspect of the present invention, there is provided a conversion stage for converting data read from a medium into a unique format, a large-capacity storage medium for holding data converted by the conversion means, and conversion from the unique format into the original format. A restoring means for performing a retry process and a retry means for determining a retry of the writing process, and a process for moving a content having a copy-inhibited attribute is performed.

  According to a fourth aspect of the present invention, there is provided primary recording means for recording a rewritable medium to be written in a format that cannot be read by another apparatus, and media that has been recorded by the primary recording means in another apparatus. However, it is provided with a secondary recording means for enabling reading, and a process for moving the content of the copy disabled attribute is performed.

  As a result, the objective of transferring non-copyable content recorded on media that cannot be erased to another media is maintained without compromising user benefits while maintaining copyright protection.

(Embodiment 1)
FIG. 1 is a block diagram of a system configuration of a recording apparatus according to Embodiment 1 of the present invention.

  In the figure, reference numeral 100 denotes a first recording medium on which content that cannot be copied is recorded. In this embodiment, a write-once medium that can be written only once is used, and data and content recorded on this medium are signals. Data or data cannot be deleted. In this embodiment, an optical disc that is optically recorded and reproduced is assumed, but the recording method and form (not limited to the disc) are not limited. Also, the media types correspond to, for example, CD-R and DVD-R, but are not limited to these. A DVD-ROM may be used. Note that “content that cannot be copied” refers to content that has been subjected to copyright protection obtained via, for example, the Internet or digital broadcasting.

  Reference numeral 101 denotes a second recording medium capable of recording / reproducing data and contents. In this embodiment, a hard disk drive (HDD) represented by a large-capacity storage medium is used. If it can be deleted, it is not limited to this.

  Reference numeral 102 denotes a third recording medium capable of recording / reproducing data and contents. In this embodiment, a copyright management medium is used. In this embodiment, a write-once medium such as a DVD-R and a rewritable medium such as a DVD-RAM are used as the type of recording medium. However, the type and form of the recording medium are not limited. Moreover, it does not have to be a copyright management medium.

  Reference numeral 103 denotes intermediate data recorded on the second recording medium 101 and converted into a format unique to the recording apparatus. This intermediate data is in a format that cannot be reproduced by other recording devices or reproducing devices.

  Reference numeral 104 denotes a recording apparatus having the above-described configuration, which can record / reproduce / delete data and contents, and at least perform a moving process. An example of the recording device is an HDD built-in DVD recorder, but is not limited to this. At least a recording medium capable of recording / reproducing data and contents (second recording medium 101 of the present embodiment) and a recording medium that can be attached to and detached from the apparatus (first and third of the present embodiment) The recording media 100 and 102) may be any one that can be mounted or loaded selectively or both at the same time.

  The operation of the embodiment configured as described above will be described below.

  In FIG. 1, first, a first recording medium 100 on which content that cannot be copied is recorded is loaded into a recording device 104. The first recording medium 100 is, for example, a write-once medium such as a DVD-R in which content protected by copyright via digital broadcasting or the like is recorded by this apparatus or another recording apparatus compatible with the write-once medium. It corresponds to.

  The non-copyable content recorded on the first recording medium 100 is read from the first recording medium 100 by the recording device 104, converted into the format of the intermediate data 103, and temporarily stored in the second recording medium 101. Saved in. At this time, the non-copyable contents in the first recording medium 100 are not deleted yet and remain. At this stage, the non-copyable content to be moved is stored in the second recording medium 101 with the data converted into another format (intermediate data 103) while the original is stored in the first recording medium 100. Thus, two or more contents of the same format do not exist.

  Next, the recording device 104 performs a destruction process on the first recording medium 100 at this point, and prevents the first recording medium 100 from reading data by any means. As a method for the destruction process, for example, there is a method in which the recording layer destruction is performed by changing the media characteristics by irradiating a high-power or high-temperature laser that the recording layer in the first recording medium 100 cannot withstand. When the first recording medium 100 is a non-recordable read-only medium (ROM medium such as a CD-ROM or DVD-ROM), etc., physical stress (scratching / stress application / cutting, etc.) is applied to the recording medium. It is possible to perform physical destruction by providing the above method.

  Next, if the apparatus can load the first and third recording media 100 and 102 simultaneously, the process proceeds to the next process. If the apparatus can load only one of the recording media, the first recording medium 100 The recording medium 100 is removed from the apparatus, and the third recording medium 102 is loaded.

  After that, the recording device 104 restores the temporarily stored intermediate data 103 to the original format (the format of the non-copyable content recorded on the first recording medium 100) and restores it to the third recording medium 102. Record. Even at this stage, since the intermediate data 103 is stored in the second recording medium 101 and the non-copyable content is stored in the third recording medium 102, two contents of the same format are stored. No more exist.

  After completing the writing of the third recording medium 102, the second recording medium 101 erases the intermediate data 103 that has been temporarily stored. As a result, a plurality of third recording media 102 on which content restored to the original format based on the intermediate data 103 is recorded cannot be created.

  In order to further improve security in terms of copyright protection, after the content restored based on the intermediate data 103 is recorded on the third recording medium 102, the intermediate data 103 in the second recording medium 101 is recorded. The third recording medium 102 may not be removed from the recording device 104 until the deletion is completed.

  By the above processing, it is possible to obtain an effect that the non-copyable content can be moved by the recording device 104 from the first recording medium 100 to the third recording medium 102 while maintaining copyright protection.

  Next, the operation of the media destruction process will be described with reference to FIG.

  FIG. 2 is a flowchart of media destruction processing according to the first embodiment of the present invention, where S20 is data erasure, S21 is recording layer destruction, S22 is media physical destruction, and A is no distinction between media types. Indicates that the media is destroyed. For the media destruction processing, various means can be considered depending on the specifications of the recording apparatus within a range in which it is possible to guarantee that data cannot be read again.

  First, when a media destruction command is input (step S23), it is confirmed whether the media loaded as the first recording medium 100 is a rewritable medium (step S24). If the medium is a rewritable medium, normal data erasure processing can be performed without performing destruction processing, and therefore data erasure processing is performed (step S20). On the other hand, if the medium is a write-once medium (step S25), the recording layer is destroyed by irradiating a high-power laser that cannot be withstood by the recording layer of the medium (step S21). Further, when the medium is a read-only medium (ROM medium) that is not a recording type (rewritable type, write-once type, etc.), the medium is physically destroyed by a method such as scratching or stressing (step S22).

  Further, as shown in A, it is possible to perform physical destruction of the media (step S22) in any case without considering the type of the media. Further, instead of physical destruction (step S22), data reading may be disabled by using a chemical reaction with chemicals or the like, or deformation or dissolution by heat.

  As described above, it is possible to prevent the data from being read again from the media by the destruction processing of the media by the recording device.

  FIG. 3 is a flowchart of the retry process at the time of recording according to the first embodiment of the present invention. S30 is a process for writing intermediate data to a medium capable of copyright management, and S31 is a medium exchangeable for copyright management. S32 is a process for determining whether or not the writing is successful, and S33 is a retry start command at the time of recording.

  First, when a retry command for recording is input (step S33), a data writing process is performed (step S33), and it is determined whether or not the data writing is normally completed (step S32). If the writing is normally completed, the processing is terminated as it is (step S34). However, if an error occurs in the middle of data writing, or if it is detected that data cannot be written correctly in the data comparison process after the writing is completed, the user is prompted to replace it with a new medium (step S31). Data writing processing (retry) is performed again with a new medium (step S30).

  Optical discs always have a possibility of writing failure due to physical characteristics or media surface contamination. In particular, once write-once media have failed to be written, writing to the media can no longer be completed. Therefore, having such a mechanism capable of retrying has an effect of preventing the user from losing data without completing the movement process.

  FIG. 4 is a block diagram of the processing configuration of the recording apparatus according to the first embodiment of the present invention. 400 is a data reading unit that reads data from a medium, 401 is an original data format read by the data reading unit 400, and FIG. Data conversion means for converting into a unique data format that cannot be read by other systems; 402, data holding means for holding data converted into a unique format by the data conversion means 401; 403, data that has been recorded on the medium 405 is a media destruction unit that destroys the media based on a command from the disabling unit 403, 405 is a destruction confirmation unit that confirms whether the media is destroyed by the media destruction unit 404, Unique system that cannot be read by other systems held in the data holding means 402 Data restoration means for converting the data format into the original data format, 407 is a data writing means for writing the data restored by the data restoration means 406 to the medium, and 408 detects writing to the medium by the data writing completion confirmation means 409 Retry processing determination means 409 for determining whether or not to retry the writing process, and 409 represents a data writing completion confirmation means for confirming whether the data writing means 407 has correctly written data on the medium.

  FIG. 5 is a flowchart of the overall processing of the recording apparatus according to the first embodiment of the present invention, and the operation in each step corresponds to each block in FIG. The corresponding relationships are 400 and 401 for S500, 402 for S501, 403, 404 and 405 for S502, 406 and 407 for S503, 408 and 409 for S504, and 402 for S505.

  In the following, the movement process flow in the first embodiment of the present invention will be described.

  First, in S500, data is read from the medium and converted from the original format to the original format. Next, in S501, the converted data is held in the mass storage medium. The purpose of this conversion to the original format is to prevent reading from other systems.

  After the data holding is completed in S501, a media destruction process S502 for making it impossible to re-read the original data is performed. If S502 fails, the migration process fails and the intermediate data in the original format held in S501 is discarded in S505 and the process ends.

  If S502 is successful, the original format data is converted to the original format and the data is written in S503. In step S504, it is determined whether the writing has been successful. If successful, the intermediate data in the original format held in S501 is discarded in S505, and the process ends.

  Possible causes of the processing failure detected in S504 include a case where a writing failure notification is generated from S407 during writing, or a case where data does not match when data comparison is executed in S409 after writing is completed. It is done. If it fails, the writing process is performed again in S503. If the write target is a rewritable medium, it is possible to retry as it is. If the write target is a write-once medium, the medium is exchanged and the retry of S503 is performed.

  If the process finally succeeds in step S504, the intermediate data in the original format held in step S501 is discarded in step S505, and the process ends.

  With the above processing, it is possible to obtain the effect that data having a non-copyable attribute can be moved from the write-once medium.

  In order to perform the movement process, it can be safely said that all data is read correctly and all data is written correctly before the original data is erased. Also, from the viewpoint of copyright protection, it is not desirable that complete data is stored in a plurality of locations at the same time, even temporarily, despite the non-copyable attribute.

  Discarding the medium after the data holding is completed in step S502 has an effect of confirming that the data has been read correctly.

  Holding intermediate data in a unique format in means S501 has the effect of making it possible to perform the retry of S503 and improving the safety of correctly writing data. In particular, when writing to a write-once medium such as a DVD-R, a part of the data cannot be temporarily recorded in a temporary recording state and cannot be rewritten later. Therefore, it is necessary to retry the entire writing process as in S503. .

  The conversion of the data format by means S501 and means S503 has the effect of not enabling complete data at the same time.

  FIG. 6 is a diagram showing changes in the effective content existence period in the first embodiment of the present invention, where 600 is the effective content effective period start point in the source write-once medium, and 601 is the same end point. , 602 is the starting point of the retention of the unique format data in the mass storage medium holding the data, 603 is the end point, 604 is the starting point of the valid period of the valid content in the destination copyright management medium, and 605 is the end Represents a point.

  600 is equal to the time when the source medium is created. 602 is equal to the time when the data is converted into the original format by S500 and stored, and 601 is equal to the time when the medium is destroyed by S502. 604 is equal to the time when the original format is converted and written in S503, and 603 is equal to the time when data is erased in S505. 605 is equal to a point in time when the destination medium is discarded in the future.

  From the viewpoint of copyright protection, it is necessary to prevent unauthorized access to the recording device and taking out a plurality of contents having a non-copyable attribute.

  The content existence time overlaps in two places, a period from 602 to 601 and a period from 604 to 603, but since one of them is held in a unique format, a plurality of contents are obtained by forced reading by the user. It will not be taken out. Further, there is no overlap in the period from 601 to 604.

  As described above, by interposing intermediate data held in the original method in the middle, it is possible to obtain an effect of preventing a plurality of contents having non-copyable attributes from being taken out.

  As described above, according to the present embodiment, after all the data to be moved is stored in the recording apparatus in a unique format that cannot be analyzed by other devices, the first recording medium 100 that is the movement source is destroyed. Thereafter, writing is performed on the third recording medium 102 which is the destination medium. Since it is held as intermediate data 103 in a unique format, it is possible to prevent unauthorized copying of uncopyable content, and to perform retry processing when writing to the third recording medium 102 fails via the intermediate data 103. it can. Although this involves the destruction of the first recording medium 100 that is the source medium, the retry process of the writing process is realized while maintaining the copyright protection, so that an effect of preventing the failure of the moving process can be obtained.

(Embodiment 2)
FIG. 7 is a block diagram of the system configuration of the recording apparatus according to the second embodiment of the present invention. 700 is a write-once medium (DVD-R or the like) on which non-copyable content is recorded, and 701 is a buffer in the apparatus. A memory (SDRAM or the like) 702 used is a rewritable medium (DVD-RAM or the like) that can be copyright-managed and rewritable, and 704 represents a recording device that performs a moving process.

  The second embodiment is characterized in that it is not necessary to hold a large-capacity storage medium in 704 by simultaneously accessing 700 and 701 in the recording apparatus 704 and limiting the destination to the rewritable medium.

  In FIG. 7, the non-copyable content recorded on the medium 700 is read and simultaneously recorded on the destination medium 702 via the buffer memory 701 at the same time. At this point, the recording device 704 performs a destruction process on the medium 700 so that data cannot be read out by any means.

  Thereafter, the recording device 704 performs secondary recording on the medium 702.

  By the above processing, the effect that the content that cannot be copied from the medium 700 to the medium 702 is moved by the recording device 704 is obtained.

  FIG. 8 is a block diagram of a processing configuration of the recording apparatus according to the second embodiment of the present invention, in which 800 is a data reading unit that reads data from the medium 700, and 801 is a buffer that temporarily stores the data read by the data reading unit 800. Temporary data storage means 802, temporary recording state management means 802 for managing the temporary recording state of the destination, 803 primary recording means for primary recording at the destination, and 804 secondary to the destination Secondary recording means for recording, 805 is data writing means for writing data to the destination (medium 702) in accordance with an instruction from the primary recording means 803 or secondary recording means 804, and 806 is data that has been recorded on the medium 700 807 is a medium that destroys the medium 700 by an instruction from the disabling means 806. Corrupted means, 808 represents a media destruction confirmation means for confirming whether the media 700 has been destroyed by the media rupturing means 807.

  FIG. 9 is a flowchart of the overall processing of the recording apparatus according to the second embodiment of the present invention. Each step corresponds to each block in FIG. 8, and S900 is 800, 801, 802, 803, and 805. S901 corresponds to 806, 807, and 808, and S902 corresponds to 802, 804, and 805, respectively.

  Hereinafter, a processing flow of movement in the second embodiment of the present invention will be described.

  First, in S900, data having a copy-inhibited attribute is read from the movement source medium, and is primarily recorded on the movement destination medium. The primary recording is a recording in which a part of data is temporarily put into a temporary recording state on the assumption that the data is rewritten to a correct state later, and data cannot be reproduced in the primary recorded state. In step S901, the transfer source medium is destroyed and cannot be read. Due to the success of the destruction, the secondary recording process is performed on the media on which the primary recording has been completed in step S902 so that the media can be reproduced. Since the rewriting process occurs here, the destination must be a rewritable medium. Since the secondary recording process can fulfill its purpose by a partial rewriting process, it is not necessary to retain all the original data, and consequently no large-capacity storage medium is required.

  If the destruction fails in S901, the process ends. Since the secondary recording process is not performed in S902, the process ends in an incomplete state where the destination medium cannot be reproduced.

  With the above processing, it is possible to obtain the effect that data having a non-copyable attribute can be moved from the write-once medium.

  FIG. 10 is a diagram showing changes in the effective content existence period in the second embodiment of the present invention, where 1000 is the effective content valid period start point in the source write-once medium, and 1001 is the same end point. , 1002 represents the start point of the primary recorded state in the rewritable medium that can manage the copyright of the transfer destination, 1003 represents the start point of the valid period of the valid content on the medium, and 1004 represents the end point.

  1000 is equal to the time when the source medium is created. 1002 is equal to the time when the data is first recorded from the movement source by S800 and S803. 1001 is equal to the time when the media is destroyed in step S806. 1003 is equal to the time point when the secondary recording is performed in S804 and rewritten to a reproducible state. 1004 is equal to a point in time when the destination medium is discarded in the future.

  The content existence time overlaps in a period from 1002 to 1001, but the moving destination medium is in a temporary recording state in which only primary recording has been completed, and the user cannot reproduce it. Further, there is no overlap in the period from 1001 to 1003.

  As described above, once the temporary recording state by the primary recording process is sandwiched, an effect of preventing a plurality of copy-inhibited contents from being taken out can be obtained.

  Continuous storage and operation of data assets as a technology to move non-copyable content recorded on write-once media to another media while maintaining copyright protection before data cannot be read due to media deterioration. Available to:

1 is a block diagram of a system configuration of a recording apparatus according to Embodiment 1 of the present invention. Flow chart of media destruction processing in Embodiment 1 of the present invention Flow diagram of retry processing during recording in Embodiment 1 of the present invention 1 is a block diagram of a processing configuration of a recording apparatus according to Embodiment 1 of the present invention. FIG. 3 is a flowchart of overall processing of the recording apparatus according to the first embodiment of the present invention. The schematic diagram showing the change of the effective content existence time in Embodiment 1 of this invention Block diagram of the system configuration of the recording apparatus according to the second embodiment of the present invention. Block diagram of the processing configuration of the recording apparatus in Embodiment 2 of the present invention Flow chart of overall processing of recording apparatus in embodiment 2 of the present invention Schematic diagram showing changes in the effective content existence period in Embodiment 2 of the present invention

Explanation of symbols

100, 700 Write-once media 101 Mass storage media 102, 702 Copyright-controllable media 103 Intermediate data 104, 704 Recording device

Claims (4)

Reading means for reading data from a first recording medium in which content that cannot be copied is recorded, disabling means for destroying the first recording medium to make it unreadable, and data read by the reading means for other devices Conversion means for converting the data converted into data that cannot be analyzed, and writing means for restoring the data converted by the conversion means to the original content and writing the data to a second medium capable of copyright management. A content recording apparatus. Reading means for reading data from a first recording medium in which content that cannot be copied is recorded, disabling means for destroying the first recording medium to make it unreadable, and data read by the reading means for other devices Conversion means for converting the data converted into data that cannot be analyzed by the information processing means, and writing means for restoring the data converted by the conversion means to the original content and writing the data to a second medium capable of copyright management. Reads data from the first recording medium and converts the data into data that cannot be analyzed by another device, the disabling means renders the first recording medium unreadable, and the writing means cannot analyze in the other format. A content recording apparatus that restores original data to the original data and writes the original data to the second recording medium. A conversion stage for converting data read from the medium into a unique format, a large-capacity storage medium for holding the data converted by the conversion means, a restoration means for converting the original format into the original format, and a retry of the writing process 3. The content recording apparatus according to claim 1, further comprising retry means for determining whether or not content having a non-copyable attribute is moved. Primary recording means for recording the rewritable medium to be written in a format that cannot be read by another apparatus, and secondary recording means for enabling the other apparatus to read the media recorded by the primary recording means. 3. The content recording apparatus according to claim 1, wherein the content recording apparatus performs a process of moving content having a copy-inhibited attribute.

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