JP2011159347A - Recording and reproducing device, information processing apparatus, control method of recording and reproducing device, control program, computer readable recording medium, and information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely utilize encrypted information which is obtained from the outside. <P>SOLUTION: A drive device 1 includes: a data obtaining part 111 which obtains encrypted related information relating to registration information from the outside; a reproduction control part 113 which reads key information for decrypting related information recorded on an optical disk 100 from an optical disk 10, when the data obtaining part 111 obtains the related information; a decrypting part 112 which decrypts the related information using the key information read by the reproduction control part 113. The encrypted related information obtained from the outside is securely utilized. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information recording medium having a plurality of information recording areas on which various types of information are recorded, and a recording / reproducing apparatus capable of controlling recording / reproducing of information with respect to the information recording medium.

  In recent years, books, such as a dictionary, a map, and an instruction manual for an electronic device, which have been conventionally provided in a paper medium, are digitized and recorded on a recording medium such as an optical disk for sale. As this optical disc, a CD-ROM or DVD-ROM having a read-only recording area (ROM area) and a rewritable recording area (RAM area) is used. For example, in Patent Document 1, an electronic book (fixed information) is recorded in the ROM area, and additional information such as annotations and underlines added by the user to the fixed information is recorded in the RAM area. Technology is disclosed.

  In addition, when updating the fixed information recorded on the optical disc, information on addition / update / deletion of the fixed information is recorded in the RAM area via a network as in Patent Document 2, for example. Further, in Patent Document 2, specific information (for example, BCA data) that is different for each optical disc is prepared so that illegal download of the downloaded information is prevented and the information is used securely. This specific information and download history are managed. Thereby, user recognition can be performed at the distribution source so that only authorized users can obtain the downloaded information.

  As a technique for securely using the fixed information recorded in the ROM area, in Patent Documents 3 and 4, whether information is an original optical disk in the ROM area is used. (Is it an optical disc created by illegal copying)?

JP 2000-76115 A (published March 14, 2000) Japanese Patent Laid-Open No. 11-144322 (published on May 28, 1999) JP 2003-36595 A (published February 7, 2003) JP 2004-39014 A (published February 5, 2004)

  However, in Patent Document 1, the additional information recorded in the RAM area of the optical disc is information recorded by a user who uses the optical disc in the first place, and is not downloaded information. Therefore, the information is used securely. There is no need to consider.

  Patent Document 2 discloses a technique for securely using downloaded information. However, in this technique, information for identifying an optical disc at a distribution source and information for downloading are disclosed. Since it is necessary to manage them in association with each other, the burden on the distribution source may increase.

Further, Patent Documents 3 and 4 are techniques for securely using fixed information recorded in a ROM area, and are not techniques for securely using downloaded information.

  Further, in Patent Documents 1 to 4, when the information to be downloaded is encrypted instead of the fixed information recorded in advance in the ROM area, the information is used securely by using the key information. No technology is disclosed. In other words, if the information to be downloaded is not encrypted, unauthorized copying can be easily performed on the device side that acquires this information if management at the distribution source is not performed as in Patent Document 2. It is difficult to use this information securely.

  The present invention has been made to solve the above-described problem, and its purpose is to provide a recording / reproducing apparatus, an information processing apparatus, and the like that can securely use (operate) encrypted information acquired from the outside, It is an object to provide a control method of a recording / reproducing apparatus, a control program, a computer-readable recording medium, and an information recording medium.

  In order to solve the above problems, a recording / reproducing apparatus according to the present invention is a recording / reproducing apparatus capable of controlling recording or reproduction of information with respect to an information recording medium on which registration information is recorded. Acquisition means for acquiring encrypted related information related to information from outside, and for decrypting the related information recorded on the information recording medium when the acquisition means acquires the related information The reproduction control means for reading the key information from the information recording medium, and the decryption means for decrypting the related information using the key information read by the reproduction control means.

  In order to solve the above problems, a recording / reproducing apparatus control method according to the present invention can control recording or reproduction of information on an information recording medium on which registration information is recorded. The acquisition step of acquiring the encrypted related information related to the registration information from the outside, and when acquiring the related information in the acquisition step, is recorded in the information recording medium, A reproduction control step for reading key information for decrypting the related information from the information recording medium, and a decryption step for decrypting the related information using the key information read in the reproduction control step. It is a feature.

  According to the above configuration, when the acquisition unit (acquisition step) acquires encrypted related information related to the registration information recorded on the inserted information recording medium from the outside, the reproduction control unit (reproduction) The control step) reads out the key information recorded on the information recording medium, and the decryption means (decryption step) decrypts the acquired related information using the key information.

  For this reason, when the information recording medium having the key information for decrypting the related information is inserted and the key information is read out, the recording / reproducing apparatus of the present invention is obtained from the outside in an encrypted state. The related information can be decoded, and the related information can be used. On the other hand, if the information recording medium having the key information is not inserted and the key information cannot be read, the recording / reproducing apparatus cannot decrypt the related information using the key information. Related information is not available.

  That is, the recording / reproducing apparatus of the present invention decrypts related information when the information recording medium has key information, and does not decrypt the information when it does not have key information. Use of related information can be avoided when a recording medium is not inserted or when an information recording medium having no key information is inserted.

In addition, even if the related information is illegally copied to another information recording medium having no key information, the recording / reproducing apparatus of the present invention cannot decrypt the related information without the key information. Cannot be used. For this reason, in the recording / reproducing apparatus of the present invention, it is possible to avoid a situation in which related information illegally copied is used.

  As described above, the recording / reproducing apparatus (the control method thereof) of the present invention can provide secure use of encrypted related information acquired from the outside.

  The recording / reproducing apparatus according to the present invention preferably includes recording control means for recording the decoded related information, which is related information decoded by the decoding means, on the information recording medium.

  According to the above configuration, the recording control unit records the decrypted related information on the information recording medium in which the registration information related to the decrypted related information is recorded. That is, since the registration information and the decrypted related information related to the registration information are recorded on the same information recording medium, the registration can also be performed in other apparatuses capable of performing reproduction control on the information recording medium. The decrypted related information can be used for the use of information. Moreover, it is possible to centrally manage these related information using a single information recording medium.

  In the recording / reproducing apparatus according to the present invention, the information recording medium includes a first information recording layer on which the registration information and the key information are recorded and which can only reproduce the information, and information is additionally recorded or rewritten. It is preferable that the recording control unit records the decrypted related information on the second information recording layer.

  According to the above configuration, since the key information is recorded in the first information recording layer where the registration information is recorded, the key information is not additionally recorded or rewritten. For this reason, unauthorized use such as falsifying and using key information can be prevented in advance.

  Further, the information recording medium having the registration information and the key information has the second information recording layer, and the recording control unit records the decrypted related information in the second information recording layer. Therefore, even when this information recording medium is used, the decrypted related information can be used for the use of the registered information in the other devices as described above.

  In the recording / reproducing apparatus according to the present invention, it is preferable that the acquisition unit acquires update information, which is information for updating the registration information, as the related information.

  According to the above configuration, the registration information is obtained using the information recording medium by decrypting the update information for updating the registration information acquired from the outside and recording the information on the information recording medium on which the registration information is recorded. Can be managed in the latest state.

  In the recording / reproducing apparatus according to the present invention, it is preferable that the reproduction control means reads the decoded related information when the decoded related information is recorded on the information recording medium by the recording control means.

  According to the above configuration, when the acquisition unit acquires the update information as the related information, the recording control unit records the decoded related information, which is information obtained by decoding the update information, on the information recording medium. In this case, the reproduction control means reads the decrypted related information from the information recording medium. That is, when the decrypted related information is recorded on the information recording medium, the reproduction control means can read the decrypted related information, which is information after updating the registered information, instead of the registered information.

As a result, even if new facts are found in the registration information, or there is an error in the registration information, the updated or repaired registration information is not used. Can be read.

  The information processing apparatus according to the present invention preferably includes the recording / reproducing apparatus described above. Thereby, also in this information processing apparatus, there can exist an effect similar to said recording / reproducing apparatus.

  The recording / reproducing apparatus may be realized by a computer. In this case, a control program for the recording / reproducing apparatus that causes the computer to realize the recording / reproducing apparatus by operating the computer as each of the above-described means, and A computer-readable recording medium on which it is recorded also falls within the scope of the present invention.

  According to the control program, the recording / reproducing apparatus can be realized on the computer by realizing the above means on the computer. Further, according to the recording medium, the control program read from the recording medium can be realized on a general-purpose computer.

  An information recording medium according to the present invention is characterized in that registration information and key information for decrypting related information that is encrypted and related to the registration information are recorded.

  According to the above configuration, the key information for decrypting the encrypted related information related to the registration information is recorded together with the registration information. In other words, registration information and key information for decrypting the related information are managed by the same information recording medium.

  That is, for example, when the information recording medium of the present invention is inserted into the recording / reproducing apparatus of the present invention, related information related to the registered information is decrypted using the key information, but the information recording medium is not inserted. In this case, the related information is not decrypted using the key information, and the related information is not used by the recording / reproducing apparatus. For this reason, it is possible to avoid the use of related information in the recording / reproducing apparatus when the information recording medium of the present invention is not inserted or when an information recording medium having no key information is inserted.

  Even if the related information is illegally copied to another information recording medium, the illegally copied related information is not decrypted unless the information recording medium has key information. For this reason, by using the information recording medium of the present invention, it is possible to avoid a situation in which related information illegally copied is used.

  As described above, the information recording medium according to the present invention can provide secure use of encrypted related information acquired from the outside.

  An information recording medium according to the present invention includes at least a first information recording layer on which registration information is recorded and which can only reproduce information, and a second information recording layer on which information can be additionally recorded or rewritten. The key information is preferably recorded on the first information recording layer.

  According to the above configuration, since the key information is recorded in the first information recording layer that can only reproduce information, the key information is not additionally recorded or rewritten. For this reason, unauthorized use such as falsifying and using key information can be prevented in advance.

  In the information recording medium according to the present invention, it is preferable that decrypted related information, which is related information decrypted using the key information, is recorded on the second information recording layer.

According to the above configuration, the second information recording of the information recording medium having the first information recording layer in which the decrypted related information decrypted using the key information is recorded with the registration information related to the decrypted related information. Recorded on the layer. That is, since the registration information and the decrypted related information related to the registration information are recorded on the same information recording medium, the recording / reproducing apparatus of the present invention capable of performing reproduction control on the information recording medium Even in another device different from the above, the decrypted related information can be used by using the registered information. Moreover, it is possible to centrally manage these related information using a single information recording medium.

  As described above, the recording / reproducing apparatus according to the present invention obtains the encrypted related information related to the registration information from the outside, and when the obtaining means obtains the related information, Using the reproduction control means for reading the key information for decoding the related information recorded on the information recording medium from the information recording medium, and the key information read by the reproduction control means, the related information is decrypted. And a decoding means.

  In addition, as described above, the control method of the recording / reproducing apparatus according to the present invention obtains the encrypted related information related to the registration information from the outside, and obtains the related information in the obtaining step. Using the reproduction control step for reading out the key information for decrypting the related information recorded in the information recording medium from the information recording medium, and the key information read out in the reproduction control step. And a decoding step of decoding the related information.

  Therefore, the recording / reproducing apparatus (the control method thereof) of the present invention has an effect that it is possible to securely use the encrypted related information acquired from the outside.

It is a figure which shows an example of a more detailed structure of the drive device which concerns on one Embodiment of this invention. It is a block diagram which shows schematic structure of the recording / reproducing system which concerns on one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of schematic structure of the optical disk which concerns on one Embodiment of this invention, (a) is a figure which shows an optical disk when it sees from the reproduction light incident side, (b) is each recording of an optical disk It is a figure which shows the structural example of a layer. It is a figure which shows an example of schematic structure of the drive device which concerns on one Embodiment of this invention. It is a figure which shows the address table produced with the drive device which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the process in the drive device which concerns on one Embodiment of this invention.

  The following describes one embodiment of the present invention with reference to FIGS.

[Configuration of Recording / Reproducing System 10]
First, the recording / reproducing system 10 according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing a schematic configuration of the recording / reproducing system 10 according to the present embodiment. As illustrated, the recording / reproducing system 10 includes a PC 2 (information processing device), a display device 3, a keyboard 4, and a mouse 5. The PC 2, the display device 3, the keyboard 4 and the mouse 5 are wired and wireless. It is possible to perform data communication using infrared rays or the like. That is, in the present embodiment, the PC-side control unit 21 of the PC 2 acquires a user operation input to the keyboard 4 and the mouse 5 and performs processing according to the user operation. Further, the PC-side control unit 21 controls the display device 3 to display an image (for example, registration information recorded on the optical disc 100 described later) on a display included in the display device 3. In addition, since the structure of the display apparatus 3, the keyboard 4, and the mouse | mouth 5 is known, it abbreviate | omits about specific description.

  Note that the operation device capable of acquiring the user operation is not limited to the keyboard 4 or the mouse 5, but may be a remote control or a touch pad having this function, or may be a voice input device such as a microphone. Further, the device that provides information to the user is not limited to the display device 3, and may include an audio output device such as a speaker. In addition, as a display of the display apparatus 3, although the liquid crystal panel is used, for example, not only this but an organic EL (Electro Luminescence) panel etc. may be used.

  The PC 2 controls peripheral devices such as the display device 3, the keyboard 4 and the mouse 5, and the drive device 1 (recording / reproducing device) built in the PC 2. The PC 2 includes a drive device 1, a PC-side control unit 21, a storage unit 22, a primary storage unit 23, and an external I / F 24. The drive device 1 may not be built in the PC 2 but may be externally connected.

  The drive device 1 includes an insertion portion (not shown) into which an optical disc (optical information recording medium) such as a DVD or a BD is inserted, and can control recording or reproduction of information on the optical information recording medium. It is. A specific configuration of the drive device 1 will be described later.

  The PC-side control unit 21 controls components (such as the drive device 1) and peripheral devices (such as the display device 3) of the PC 2 by executing a control program, for example. The PC-side control unit 21 reads and executes a program stored in the storage unit 22 provided in the PC 2 to a primary storage unit 23 configured by, for example, a RAM (Random Access Memory) or the like as necessary. Perform various processes.

For example, when the PC-side control unit 21 acquires a user operation via the keyboard 4 or the mouse 5, the PC-side control unit 21 analyzes the user operation and issues an instruction based on the analysis result, for example, by issuing an ATAPI (Attachment Packet Interface) command. Notify the device 1. When an optical disk is inserted in the drive device 1, for example, an instruction for reproducing or recording information on the optical disk is transmitted. In addition, when the PC-side control unit 21 acquires information read from the optical disc as a response to the transmitted ATAPI command from the drive device 1, the PC-side control unit 21 causes the display device 3 to display the information.

  The storage unit 22 records (1) a control program for each unit, (2) an OS program, (3) an application program, and (4) various data to be read when the program is executed by the PC-side control unit 21. To do. The storage unit 22 is configured by a nonvolatile storage device such as a flash memory.

  The primary storage unit 23 is configured by a volatile storage device such as a RAM (Random Access Memory), and temporarily stores data during the execution of the above-described various programs by the PC-side control unit 21. Used as a work area.

  The external I / F (interface) 24 is an interface for realizing communication between the PC-side control unit 21 and each peripheral device. Accordingly, the display device 3 displays an image stored in the storage unit 22 or an image read from the optical disk by the drive device 1 under the control of the PC side control unit 21, or the PC side control unit 21 displays the keyboard 4. Alternatively, a user operation on the mouse 5 can be acquired.

[Configuration of Optical Disc 100]
Next, an example of a schematic configuration of the optical disc 100 according to the present embodiment will be described with reference to FIG. FIG. 3 is a diagram showing an example of a schematic configuration of the optical disc 100 according to the present embodiment, and FIG. 3A is a diagram showing the optical disc 100 when viewed from the reproduction light incident side, and FIG. b) is a diagram illustrating a configuration example of each recording layer of the optical disc 100. FIG.

  First, as shown in FIG. 3A, the optical disc 100 includes a management area 101 and a lead-in area 102 on the inner circumference side.

  The management area 101 is an area provided in a recording layer (RE layer) that is the innermost circumference of the optical disc 100 and farthest from the reproduction light incident side, and can be accessed only by an area that does not require tracking control or focus control. This is a barcode-shaped recording area, for example, a BCA (Burst Cutting Area). For example, the drive device 1 is designed to read information in the management area 101 first when the optical disc 100 is inserted. The management area 101 is an area in which information can be written only at the time of manufacture (that is, an area that cannot be rewritten).

  In the management area 101, disc identification information indicating the structure of the optical disc 100 is mainly recorded. Specific examples of the disc identification information include the type of the recording layer of the optical disc 100 (read-only type, write once type, rewritable type), the size of the optical disc 100, the version of the optical disc 100 (related to speed, etc.), the polarity of the servo, and the recording mark The recording order (or arrangement method) of each disc identification information in the management area 101 may be arbitrary. These recording orders are usually determined by standards and the like.

  The lead-in area 102 is an area provided for each recording layer on the outer peripheral side of the management area 101 in the optical disc 100. When the drive device 1 performs processing on each layer, the reproduction light is first reproduced by the control of the drive device 1. Is a recording area where information is first read (information is read out first). The lead-in area 102 includes, for example, standard conditions for recording / reproduction on the optical disc 100, information indicating permission / non-permission (access restriction) of access of the drive device 1 to each layer, defects at the time of manufacturing, and defects generated during use. Information indicating the position is recorded. Information indicating the position of the defect is recorded in a defect management area in the lead-in area 102 and the lead-out area 104.

  Next, FIG. 3B shows a recordable area where information can be recorded in the recording layer L0 when the recording layers L0, L1,... Are called from the recording layer farthest from the reproducing light incident side. The configuration of the optical disc 100 when a certain RE layer (rewritable recording layer) and recording layer L1 is a ROM layer (read-only recording layer) that is a read-only area from which information can be read is shown. The RE layer may be an R (Recordable) layer as a recordable recordable layer. In FIG. 3B, only the recording layers L0 and L1 are shown, but a configuration in which a recording layer is further provided on the reproducing light incident side may be employed. In other words, the optical disc 100 includes a ROM layer (first information recording layer) from which information can only be read, and an R layer or RE layer (second information recording) from which information can be additionally recorded or information can be rewritten. Layer).

  As shown, the recording layer L0 (RE layer) and the recording layer L1 (ROM layer) are provided with a lead-in area 102, a user data area 103, and a lead-out area 104. In addition, a management area 101 is further provided in the RE layer. Since the management area 101 has been described above, the description thereof is omitted here.

In the RE layer lead-in area 102, for example, file management information indicating attribute information of related information (including decrypted related information) recorded in the user data area 103 of the RE layer is recorded. The attribute information is information added to related information such as the name and size of the related information, creation date / time, update date / time, and related registration information. The information related to this registration information is related to which information of the registration information recorded in the ROM layer (if there are multiple types of registration information, which registration information is related) It is the information which shows and the information which shows the position. In the lead-in area 102, the address table T1 shown in FIG. 5 is recorded in association with the file management information. A method for creating and using the address table T1 will be described later.

  In addition, in the RE layer lead-in area 102, an area where information can be written only at the time of manufacture (that is, an area that cannot be rewritten) and information can be rewritten after being inserted into the drive device 1. Possible areas may be provided.

  In the lead-in area 102 of the ROM layer, for example, key information for decrypting encrypted related information related to registration information recorded in the user data area 103 of the ROM layer is recorded. This key information is set for each type-specific information indicating that the optical disc is of the same type, medium-specific information such as a serial number for each optical disc, and recorded registration information. Specific information. The key information is a key corresponding to at least a key obtained by encrypting related information related to registration information recorded on the optical disc 100. In other words, the related information managed by the external device or the optical disc is encrypted with a key corresponding to the key information recorded on the optical disc 100.

  Here, the registration information is contents or software recorded in the ROM layer of the optical disc 100, and examples thereof include electronic encyclopedias, dictionaries, telephone books and other books, music files, movie files, and the like. . In addition, the latest registration information at the time of manufacture is recorded in the ROM layer.

  The related information is encrypted information related to registration information (used for use of registration information), and is managed by an external device such as a content server. Related information includes, for example, update information for updating registration information, update information for updating registration information (update data), and supplementing it when the registration information is incomplete. Examples include supplementary information that is information. The related information is not limited to an external device, and may be managed by a portable recording medium such as an optical disk or a USB (Universal Serial Bus). The decrypted related information is related information decrypted by the drive device 1.

  In addition, as related information, when the registration information is an encyclopedia or a dictionary, additional information such as a memo or a line marker input by the user, when the registration information is a movie file, subtitles related to the registration information, etc. Additional content such as text information, advertising videos such as trailers for new movies, and the like.

  In the user data area 103 of the ROM layer, registration information recorded at the manufacturing stage is recorded. On the other hand, in the user data area 103 of the RE layer, for example, the decrypted related information, which is related information acquired and decrypted by the drive device 1 from the external device, is recorded. In the present embodiment, it is assumed that no information is recorded in the RE layer lead-in area 102 and user data area 103 at the time of manufacturing.

  The lead-out area 104 is usually provided on the outermost peripheral side of each layer of the optical disc 100, and information indicating the position of the defect described above is recorded.

  In the present embodiment, the case where the optical disc 100 is a two-layer BD including an RE layer (R layer) and a ROM layer will be described. However, the present invention is not limited to this, and at least the RE layer (R layer) and the ROM layer are at least provided. A multilayer medium including one layer at a time may be used. In other words, the optical disc 100 is a so-called hybrid disc in which information recording layers having different recording characteristics such as a ROM layer, an RE layer, and an R layer are multilayered. In addition, the optical disc 100 may not be a BD having a layer structure. For example, the optical disc 100 includes a read-only area having a ROM layer function and an additional recording or rewritable recording area having an R layer or RE layer function. It may be a partial ROM disk.

  As described above, the registration information and the key information for decrypting the encrypted related information related to the registration information are recorded on the optical disc 100. For this reason, only when the optical disk 100 is inserted into the drive apparatus 1 described later, the relevant information acquired from the outside by the drive apparatus 1 can be decrypted using this key information. That is, it is possible to avoid the use of related information in the drive device 1 when the optical disc 100 is not inserted or when an optical disc having no key information is inserted.

  Further, since only the optical disc 100 has key information, it is possible to avoid a situation in which the related information is used even if the related information is illegally copied to another optical disc.

  Furthermore, since key information is recorded in the ROM layer of the optical disc 100, additional recording or rewriting is not performed when the optical disc 100 is used. For this reason, unauthorized use such as falsifying and using key information can be prevented in advance.

  Further, since the decrypted related information is recorded in the RE layer of the optical disc 100, the registration information and the decrypted related information related to the registration information are recorded on the same optical disc 100. For this reason, other devices other than the drive device 1 can also use the decrypted related information by using the registered information. Further, the related information can be centrally managed by using one optical disc 100.

[Schematic Configuration of Drive Device 1]
Next, a schematic configuration of the drive device 1 according to the present embodiment will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of a schematic configuration of the drive device 1 according to the present embodiment.

  As shown in FIG. 4, the drive device 1 includes a drive-side control unit 11, a recording / reproducing circuit group 13, and an optical pickup 16. The recording / reproducing circuit group 13 mainly includes a pickup driving circuit 131, a laser driving circuit 132, and a reproducing circuit 133. A more detailed configuration of the drive side control unit 11 will be described later.

  In the drive device 1, the drive-side control unit 11 moves the optical pickup 16 via a pickup drive circuit 131 to a track (not shown) of a rotating optical disc (hereinafter described as the optical disc 100 in this chapter). Yes.

  The optical pickup 16 is provided with an optical head 161. Then, the drive-side control unit 11 sets recording conditions via the laser drive circuit 132, and irradiates the recording part of the optical disc 100 with a recording laser beam from the optical head 161, whereby information is recorded on the track of the optical disc 100. It has come to be.

Further, in the drive device 1, the drive-side control unit 11 moves the optical pickup 16 to the recording part of the optical disc 100 via the pickup drive circuit 131. Then, the drive-side control unit 11 sets a reproduction condition via the laser drive circuit 132 and irradiates the optical disk 100 with a reproduction laser beam from the optical head 161.

  The reflected light detected by the optical head 161 is converted into a reproduction signal by the reproduction circuit 133 and input to the drive side control unit 11. As a result, the drive device 1 reproduces information recorded on a track (consisting of a plurality of sectors) of the optical disc 100.

  In addition, the drive device 1 is provided with a disk loading recognition unit 17. The disc loading recognition unit 17 is for detecting the loading of the optical disc 100. For example, various sensors can be exemplified, but any sensor can be used as long as the loading of the optical disc 100 can be detected. . Further, the disc loading recognition unit 17 outputs the detected result to the drive side control unit 11 as a detection signal.

[Configuration of Drive Device 1]
Next, a more detailed configuration of the drive device 1 according to the present embodiment, in particular, the configuration of the drive side control unit 11 will be described with reference to FIG. FIG. 1 is a diagram illustrating an example of a more detailed configuration of the drive device 1. As shown in FIG. 1, the drive device 1 includes a drive-side control unit 11, a communication unit 12, a recording / playback control circuit group 13, a storage unit 14, and a primary storage unit 15. Since the recording / reproduction control circuit group 13 has been described above, the description thereof is omitted.

  The drive-side control unit 11 includes a data acquisition unit 111 (acquisition unit), a decoding unit 112 (decoding unit), a reproduction control unit 113 (reproduction control unit), and a recording control unit 114 (recording control unit). By executing the program, the components (communication unit 12 and the like) of the drive device 1 are controlled. The drive-side control unit 11 reads and executes a program stored in the storage unit 14 provided in the drive device 1 to a primary storage unit 15 configured by, for example, a RAM (Random Access Memory) or the like as necessary. Various processes are performed.

  For example, the drive-side control unit 11 analyzes the ATAPI command notified from the PC-side control unit 21, thereby acquiring related information by the data acquisition unit 111, reading information from the optical disc by the reproduction control unit 113, and recording control. Information is recorded on the optical disk by the unit 114. In this case, the drive-side control unit 11 transmits the acquired related information, read information, and the like to the PC-side control unit 21 as a response to the received ATAPI command.

  The data acquisition unit 111 acquires encrypted related information related to registration information from an external device. For example, when the data acquisition unit 111 acquires related information automatically distributed from an external device via the communication unit 12 or receives an instruction to acquire related information from the PC-side control unit 21, the data acquisition unit 111 controls the communication unit 12. By doing so, a related information read request is transmitted to the external device, and the related information is acquired from the external device as a response to the read request.

For example, the data acquisition unit 111 acquires related information that is encrypted and managed by an external device using key information recorded on the optical disc 100. In this case, in the external device, the encrypted related information and the key information recorded on the optical disc 100 are managed in association with each other. When the related information is automatically distributed, the data acquisition unit 111 checks whether the key information read from the optical disc 100 by the reproduction control unit 113 matches the key information included in the related information. The related information is acquired only when the key information matches. In addition, when the data acquisition unit 111 receives an instruction to acquire related information from the PC-side control unit 21, the data acquisition unit 111 transmits the key information read from the optical disc 100 to the reproduction control unit 113 to the external device. If the external device can confirm that there is related information that matches the key information, the external device transmits the related information to the data acquisition unit 111. Thereby, the data acquisition unit 111 can acquire related information as a response to the acquisition instruction.

  Although the data acquisition unit 111 acquires related information from an external device via the communication unit 12, the data acquisition unit 111 is not limited to this. For example, related information is recorded on an optical disc, and the data acquisition unit 111 inserts the optical disc into the drive device 1 (an insertion unit different from the insertion unit in which the optical disc 100 is inserted when the optical disc 100 is inserted). If so, the related information may be obtained from this optical disc. In other words, the data acquisition unit 111 acquires related information from “external”, and this “external” refers to, for example, an external device existing on a network, an optical disc or USB that records related information, and the like. It refers to a device and medium external to the drive device 1 or the PC 2, such as a portable recording medium.

  The decryption unit 112 decrypts the related information acquired by the data acquisition unit 111 using the key information read from the optical disc 100 by the reproduction control unit 51.

  The reproduction control unit 113 controls reproduction of information on the optical disk, that is, reads information recorded on the optical disk by controlling the recording / reproduction control circuit group 13. For example, in the case of the optical disc 100, the reproduction control unit 113 reads registration information from the ROM layer and related information from the RE layer. When the recording control unit 114 has recorded the decrypted related information on the optical disc 100, the reproduction control unit 113 reads the decrypted related information. The reproduction control unit 113 reads key information recorded in the ROM layer of the optical disc 100 when the data acquisition unit 111 acquires related information from an external device.

  The recording control unit 114 controls information recording on the optical disk, that is, records information on the optical disk by controlling the recording / reproducing control circuit group 13. The recording control unit 114 records the decoded related information, which is the related information acquired by the data acquisition unit 111 and decoded by the decoding unit 112, on the RE layer of the optical disc 100. Further, the recording control unit 114 records the file management information and the address table T1 created by the data management unit 115 on the RE layer of the optical disc 100.

  The data management unit 115 creates file management information and address table T1 to be recorded on the optical disc 100, and stores data (decoded related information decoded by the decoding unit 112, related information such as line markers) recorded on the optical disc 100. It is for management.

  Here, a method for creating the file management information and the address table T1 by the data management unit 115 and a method for using the address table T1 by the reproduction control unit 113 will be described.

  When acquiring the decrypted related information decrypted by the decryption unit 112, the data management unit 115 instructs the reproduction control unit 113 to read the file management information and the address table T1 from the RE layer (lead-in area 102) of the optical disc 100. . When the reproduction control unit 113 controls the recording / reproduction control circuit group 13 to read the file management information and the address table T1 from the optical disc 100, the reproduction control unit 113 transmits them to the data management unit 115. On the other hand, when there is no file management information or address table T1 on the optical disc 100 and the read control unit 113 cannot read the information, the reproduction control unit 113 notifies the data management unit 115 to that effect.

Upon receiving the file management information, the data management unit 115 creates new file management information by adding the attribute information of the decrypted related information received from the decryption unit 112 to the file management information. On the other hand, when receiving a notification that the file management information cannot be read from the optical disc 100, the data management unit 115 newly creates file management information using the attribute information of the decrypted related information. The data management unit 115 transmits the created file management information to the recording control unit 114, and the recording control unit 114 controls the recording / playback control circuit group 13 to transfer the file management information to the RE layer (read) of the optical disc 100. In area 102).

  Next, when the data management unit 115 receives the address table T1, the data management unit 115 determines the position in the RE layer of the optical disc 100 on which the decrypted related information or the related information to be added as file management information is recorded. By adding to T1, a new address table T1 is created.

  As shown in FIG. 5, the address table T1 stores “file name”, “transfer source (L1 layer: ROM layer)”, and “transfer destination (L0 layer: RE layer)”. Is recorded in the lead-in area 102). “File name” indicates the name of decrypted related information or related information (such as a memo by a user input) stored in the address table T1. “Transfer source (L1 layer: ROM layer)” is a transfer source indicating the position in the ROM layer (user data area 103) where the registered related information (or part thereof) related to the decrypted related information or related information is recorded. Indicates an address. “Transfer destination (L0 layer: RE layer)” indicates a transfer destination address indicating the position in the RE layer (user data area 103) where the decoded related information or the related information is recorded, which is determined by the data management unit 115. Is.

  In FIG. 5, update information A (decoded related information) and memo B (related information) are recorded in the RE layer of the optical disc 100, and then update information C is recorded in the RE layer as decoded related information. An address table T1 that is sometimes created is shown. As shown in the drawing, “update information A” and “memo B” are stored in the first and second levels of “file name”, respectively. Corresponding to these pieces of information, “transfer sector (L1 layer: ROM layer)” stores “100 sectors” and “80 sectors” as transfer source addresses of registration information related to these pieces of information. In the “transfer destination (L0 layer: RE layer)”, “120 sectors” and “100 sectors” are recorded as transfer destination addresses where these pieces of information are recorded.

  For example, when the data management unit 115 acquires “update information C” as the decrypted related information from the decryption unit 112, the data management unit 115 determines the position in the RE layer in which the “update information C” is recorded, and the “update information A” and “ In the address table T1 in which “memo B” is stored, the transfer source address (120 sectors in FIG. 5) of the registration information related to “update information C” and the transfer destination address (140 sectors in FIG. 5) indicating the determined position are stored. ) And. At this time, the data management unit 115 reads the attribute information (including at least the transfer source address) of the registration information recorded in the ROM layer, and updates the attribute information by referring to the attribute information and the attribute information of the update information C. The registration information (or part thereof) related to the information C is determined, and the transfer source address of the registration information is acquired. In this way, the data management unit 115 creates the address table T1.

  On the other hand, when receiving a notification that the address table T1 cannot be read from the optical disc 100, the data management unit 115 determines the decrypted related information or the transfer destination address of the related information, and newly creates the address table T1. create. The data management unit 115 transmits the created file management information to the recording control unit 114.

  The data management unit 115 transmits the created address table T1 to the recording control unit 114, and the recording control unit 114 controls the recording / playback control circuit group 13, and uses this address table T1 as the RE layer (read) of the optical disc 100. In area 102).

  In this case, when the reproduction control unit 113 receives the registration information read instruction from the PC-side control unit 21, the reproduction control unit 113 reads the file management information from the optical disc 100, and the read instruction is included in the attribute information included in the file management information. Check if there is registration information. When the reproduction control unit 113 can confirm that the registration information exists, the reproduction control unit 113 reads the address table T1 from the optical disc 100 and refers to the transfer destination address corresponding to the transfer source address that is attribute information of the registration information. The decoded related information or the related information recorded at the position indicated by

  In FIG. 5, for example, when there is a read request for registration information recorded in the 100 sector of the ROM layer from the PC-side control unit 21, the playback control unit 113 records it in the 120 sector of the RE layer. The related 120 sector decoded related information or related information is read out, and the information is transmitted to the PC-side control unit 21. On the other hand, when the playback control unit 113 refers to the file management information and determines that there is no decrypted related information or related information related to the registered information for which reading has been instructed in the RE layer, the playback control unit 113 stores the registered information itself in the ROM. Read from layer.

  In this way, the reproduction control unit 113 uses the address table T1 when the recording control unit 114 records the decrypted related information (information obtained by decoding update information obtained from the outside) on the optical disc 100. Then, the decrypted related information is read out. That is, since the reproduction control unit 113 reads the decrypted related information, which is information after the registration information is updated, instead of the registration information, it can read the registration information in the latest state. Note that when related information such as a memo input by the user is recorded on the optical disc 100, the reproduction control unit 113 can read the related information together with the registration information.

  In the above description, the control in the drive device 1 using the address table T1 has been described. However, the present invention is not limited to this, and control by an application is also possible. In this case, it is performed by data having information on the decoded related information obtained by decoding the update information in the RE layer of the optical disc 100.

  The communication unit 12 performs data communication with an external device such as a content server that stores reproduction-related information related to registration information recorded on the optical disc 100, which can be reproduced by the drive device 1, via a network (for example, the Internet). Is something that can be done. In addition, the communication unit 12 is controlled by the data acquisition unit 111, for example, to transmit a request for reading related information to the external device, or to transmit the related information acquired from the external device to the data acquisition unit 111. Process.

  The storage unit 14 records (1) a control program for each unit, (2) an OS program, (3) an application program, and (4) various data to be read when these programs are executed. To do. For example, in the storage unit 14, the reproduction control unit 113 reads out the key information, and the decryption unit 112 uses the key information to decrypt the related information (application for realizing the processing in FIG. 6). Etc. are stored. The storage unit 14 is configured by a nonvolatile storage device such as a flash memory.

  The primary storage unit 15 is configured by a volatile storage device such as a RAM (Random Access Memory), and temporarily stores data in the process in which the drive-side control unit 11 executes the various programs described above. Used as a work area. The primary storage unit 15 is used, for example, when the decryption unit 112 decrypts encrypted related information.

[Processing in Drive Device 1]
Next, referring to FIG. 6, the processing in the drive device 1 according to the present embodiment, specifically,
Processing when the drive device 1 downloads from an external device and acquires update information will be described. FIG. 6 is a flowchart showing an example of processing in the drive device 1 according to the present embodiment. In FIG. 6, it is assumed that update information for updating registration information recorded on the optical disc 100 is encrypted and managed in the external device, and the optical disc 100 is inserted in the drive device 1. .

  First, the reproduction control unit 113 reads key information from the ROM layer of the optical disc 100 (S 1) and transmits it to the data acquisition unit 111. Using this key information, the data acquisition unit 111 acquires encrypted update information from an external device existing on the network (web) via the communication unit 12 (S2). This update information may be information automatically distributed from an external device, or may be information acquired from an external device in response to an update information acquisition instruction from a user. When the data acquisition unit 111 acquires update information from the external device, the data acquisition unit 111 transmits the update information to the decoding unit 112.

  When receiving the update information, the decryption unit 112 decrypts the update information using the key information read in S1 (S3). When the decryption unit 112 decrypts the update information, the decryption unit 112 transmits decrypted update information that is the decrypted update information to the data management unit 115.

  Note that the decryption unit 112 may cause the reproduction control unit 113 to read the key information from the optical disc 100 when the update information is received. In this case, since it is not necessary to store the key information in the drive device 1, the outflow of the key information can be avoided and can be used securely. The decryption unit 112 also causes the playback control unit 113 to read out the key information when the update information is received even when the data acquisition unit 111 acquires the update information from the external device without using the key information. May be.

  Upon receiving the decrypted related information, the data management unit 115 reads the file management information and the address table T1 from the optical disc 100, and adds the attribute information, the transfer destination address, and the like of the received decrypted update information, so that the file management information And the address table T1 is updated. If the data management unit 115 cannot read the file management information or the address table T1, the data management unit 115 uses the attribute information of the received decrypted update information, the transfer destination address, etc. T1 is newly created.

  The data management unit 115 transmits the received decrypted update information, the created file management information, and the address table T1 to the recording control unit 114. Note that when the decryption unit 112 transmits the decrypted update information to the data management unit 115, the decryption unit 112 may also transmit the decryption update information to the recording control unit 114.

  When receiving the decoded update information, the file management information, and the address table T1 from the data management unit 115, the recording control unit 114 records them at a predetermined position in the RE layer of the optical disc 100 (S4).

  As described above, in the system in which the encrypted update information is disclosed on the web, the drive device 1 uses the key information recorded in the ROM layer of the optical disc 100 to update the encrypted information from the external device. Information is downloaded, update information is decoded (decoded), and recorded in the RE layer of the optical disc 100.

As described above, the drive device 1 (its control method) includes the data acquisition unit 111 (acquisition step) for acquiring encrypted related information related to registration information from the outside, and the data acquisition unit 111 receives the related information. A reproduction control unit 113 (reproduction control step) that reads out, from the optical disk 10, key information for decrypting related information that is recorded on the optical disk 100 at the time of acquisition.
And a decryption unit 112 (decryption step) that decrypts the related information using the key information read by the reproduction control unit 113.

  According to this configuration, the related information is decrypted in the case of the optical disc 100, and is not decrypted in the case of the optical disc having no key information. Therefore, when the optical disc 100 is not inserted, or the key Use of related information when an optical disc having no information is inserted can be avoided. Further, since only the optical disc 100 has key information, the drive device 1 cannot use the related information even if the related information is illegally copied to another optical disc. For this reason, the situation where the illegally copied related information is used can be avoided.

  Furthermore, since the recording control unit 114 records the decrypted related information on the optical disc 100 in which the registration information related to the decrypted related information is recorded, the registration information and the decrypted related information related to the registration information are recorded. Are recorded on the same optical disc 100. For this reason, other devices other than the drive device 1 can also use the decrypted related information by using the registered information. Further, the related information can be centrally managed by using one optical disc 100.

  Furthermore, since the data acquisition unit 111 acquires update information that is information for updating the registration information as related information, the recording control unit 114 stores the decoded related information that is update information after decoding on the optical disc 100. Record. Therefore, the registration information can be managed in the latest state using the optical disc 100. In other words, when there is a new fact found in the registration information, or there is an error in the registration information (the registration information has been damaged), the discovery and correction of the error are recorded on the optical disc together with the registration information. 100 can be recorded, so that the obsolescence of the optical disc 100 can be avoided.

  Furthermore, when the decrypted related information obtained by decrypting the update information is recorded on the optical disc 100, the reproduction control unit 113 reads the decrypted related information. Therefore, even if new facts are found in the registered information, or there is an error in the registered information, the updated or repaired registered information is used instead of the registered information. Can be read out.

[Another expression of the present invention]
The present invention can also be expressed as follows.

  That is, the recording / reproducing apparatus according to the present invention encrypts the update data, discloses it on the Web, etc. as a countermeasure against unauthorized copying of the update data, and uses the key data in the ROM layer in a dedicated application. Then, the encrypted data is downloaded from the Web, and the data is written to the recording layer while decrypting the data.

  Further, the recording / reproducing apparatus according to the present invention records the latest information in the ROM layer at that time, and writes new information in the recording layer when the information is updated. When information is read, if there is information in the recording layer, the information in the recording layer is read out. If there is no information in the recording layer, information is read out from the ROM layer.

[Supplement]
Finally, each block of the drive device 1, in particular, the data acquisition unit 111, the decoding unit 112, the reproduction control unit 113, the recording control unit 114, and the data management unit 115 of the drive side control unit 11 may be configured by hardware logic. Alternatively, it may be realized by software using a CPU as follows.

That is, the drive device 1 includes a central processing unit (CPU) that executes instructions of a control program that realizes each function, and a read only memory (ROM) that stores the program.
), A RAM (random access memory) for expanding the program, and a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is to provide a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the drive device 1 which is software that realizes the above-described functions is recorded in a computer-readable manner, This can also be achieved by supplying the drive apparatus 1 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and a compact disk-ROM / MO / MD / digital video disk / compact disk-R. A disk system including an optical disk, a card system such as an IC card (including a memory card) / optical card, or a semiconductor memory system such as a mask ROM / EPROM / EEPROM / flash ROM can be used.

The drive device 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network,
Mobile communication networks, satellite communication networks, etc. can be used. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  For example, the PC side control unit 21 of the PC 2 may control the process of the drive side control unit 11 (for example, the process shown in FIG. 6). In this case, a dedicated application for performing this process is stored in the storage unit 22 of the PC 2, and the PC side control unit 21 performs the process on the drive side control unit 11 using this dedicated application. Let it run. Further, the PC-side control unit 21 transmits an instruction for causing the drive-side control unit 11 to execute the processing using a dedicated ATAPI command.

  In the above description, the data acquisition unit 111, the decoding unit 112, the reproduction control unit 113, the recording control unit 114, and the data management unit 115 have been described as being included in the drive-side control unit 11 of the drive device 1. These members may be included in the PC-side control unit 21 of the PC 2. Similarly, the communication unit 12 may be included in the PC 2. In this case, the reproduction control unit 113 and the recording control unit 114 transmit an instruction for performing recording / reproduction control of information with respect to the optical disc to the drive device 1 using the ATAPI command.

Since the encrypted information acquired from the outside can be used securely, the present invention is suitable for a recorder having a communication function capable of receiving the information, a PC equipped with the same, a television, and the like.

1 Drive device (recording / playback device)
2 PC (information processing equipment)
100 Optical disc (information recording medium)
111 Data acquisition unit (acquisition means)
113 Reproduction control unit (reproduction control means)
112 Decoding unit (decoding means)
114 Recording control unit (recording control means)

Claims (12)

A recording / reproducing apparatus capable of controlling recording or reproduction of information with respect to an information recording medium on which registration information is recorded,
Acquisition means for acquiring encrypted related information related to the registration information from the outside;
Reproduction control means for reading from the information recording medium key information for decrypting the related information, which is recorded on the information recording medium when the acquiring means acquires the related information;
A recording / reproducing apparatus comprising: decryption means for decrypting the related information using the key information read by the reproduction control means.   2. The recording / reproducing apparatus according to claim 1, further comprising recording control means for recording the decoded related information, which is related information decoded by the decoding means, on the information recording medium. The information recording medium includes the first information recording layer on which the registration information and the key information are recorded, the information recording medium being only capable of reproducing information, the second information recording layer capable of additionally recording or rewriting information, At least,
The recording / reproducing apparatus according to claim 2, wherein the recording control unit records the decrypted related information in the second information recording layer.   The recording / reproducing apparatus according to claim 2, wherein the acquisition unit acquires update information, which is information for updating the registration information, as the related information.   5. The recording / reproducing according to claim 4, wherein the reproduction control means reads the decoded related information when the decoded related information is recorded on the information recording medium by the recording control means. apparatus.   An information processing apparatus comprising the recording / reproducing apparatus according to claim 1. A control method of a recording / reproducing apparatus capable of controlling recording or reproduction of information with respect to an information recording medium on which registration information is recorded,
An acquisition step for acquiring encrypted related information related to the registration information from the outside;
A reproduction control step of reading key information for decrypting the related information recorded in the information recording medium when the related information is acquired in the acquisition step;
And a decrypting step of decrypting the related information using the key information read in the playback control step.   6. A control program for operating the recording / reproducing apparatus according to claim 1, wherein the computer functions as each of the above-described means.   A computer-readable recording medium on which the control program according to claim 8 is recorded.   An information recording medium in which registration information and key information for decrypting encrypted related information related to the registration information are recorded. At least a first information recording layer in which registration information is recorded and only information can be reproduced; and a second information recording layer in which information can be additionally recorded or rewritten;
The information recording medium according to claim 10, wherein the key information is further recorded on the first information recording layer.   12. The information recording medium according to claim 11, wherein the second information recording layer records decrypted related information, which is related information decrypted using the key information.

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