JP2006190185A - Information recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording device capable of reducing a time necessary for security control to reduce a burden on a system. <P>SOLUTION: A content hash generated by a content hash calculation part 121 is held by a hash information holding part 122 when check-out of a content such as music data is performed, and the content hash held in the hash information holding part 122 is outputted when check-in is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information recording apparatus that outputs unique information for specifying content recorded on a recording medium and performs security control such as copyright protection.

  In recent years, music data in a personal computer is connected by connecting a personal computer (personal computer) and an information recording / reproducing device (information recording device) such as an MD (mini disc) device with a USB (Universal Serial Bus) cable. (Content) is transferred to an MD device, and the content is copied and used on a recording medium such as an MD disk. In the MD device that performs the duplication as described above, security control such as copyright protection is performed.

  As such an information recording apparatus, there is known an information recording apparatus that prevents random content diffusion based on a standard called NetMD, which is characterized by a strong copyright protection technology. The copyright protection technology of the NetMD standard is called a check-in / check-out function. Here, checkout is a procedure for transferring content from a personal computer to an information recording device and copying it to a recording medium. Check-in is a procedure for erasing copied content.

  A conventional information recording apparatus operates as follows at check-out and check-in.

  First, at the time of checkout, the content is transferred from the personal computer to the information recording device and copied to a recording medium. Next, the information recording device reads the copied content from the recording medium, generates unique information (content hash) for specifying the content, outputs it to the personal computer, and the personal computer associates the content hash with the content. Save to your computer.

Next, at the time of check-in, the information recording device reads the content of the recording medium, generates the content hash, and sends it to the personal computer. The personal computer compares the content hash stored in association with the content with the content hash sent from the MD device to confirm whether the content stored on the personal computer is the same as the content to be deleted. . This ensures that the same content transferred from the personal computer has been deleted. (For example, see Patent Document 1.)
JP 2003-338125 A

  As described above, at the time of check-in and check-out, content is read from the recording medium, and a content hash is generated based on the read content. As a result, much of the total time required for check-in or check-out is spent reading this content, especially if multiple content are checked in continuously. Since the read operation is performed a plurality of times, the read operation time is a burden on the system.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide an information recording apparatus capable of reducing the time required for security control and reducing the burden on the system.

In order to solve the above problems, the invention of claim 1
An information recording device for recording content data input from another device on a data recording medium,
When content data is recorded on the data recording medium, using the content data, a unique information generating unit that generates unique information for identifying the content data;
When the generated unique information is held in the unique information recording medium and the content data recorded on the data recording medium is specified in the other device, the unique information about the content data is stored in the unique information. A unique information control unit that reads from the recording medium for information and outputs to the other device;
It is provided with.

  Accordingly, the content data recorded on the data recording medium can be read at a high speed without generating the unique information, and the time required for specifying the content data can be shortened.

The invention of claim 2
The information recording apparatus according to claim 1,
The unique information recording medium is a volatile memory or a non-volatile memory provided in the information recording apparatus.

  As a result, since the unique information is held in the information recording apparatus, the content data recorded on the data recording medium can be read at a high speed without generating the unique information, and the time required for specifying the content data Can be shortened.

The invention of claim 3
An information recording apparatus according to claim 2, wherein
The data recording medium is an exchangeable recording medium,
The unique information control unit is configured to hold and output unique information about the content data in association with identification information for identifying a data recording medium on which the content data is recorded. And

  Thus, even if a plurality of data recording media are exchanged and used, the unique information corresponding to the content data of the exchanged data recording medium can be output at high speed, and the time required for specifying the content data can be shortened.

The invention of claim 4
An information recording apparatus according to claim 3, wherein
When the unique information control unit erases the already recorded unique information in order to record new unique information, the last use date and time of the data recording medium is old, the use frequency is low, or the information recording It is characterized by erasing unique information about content data recorded on a data recording medium designated by a user of the apparatus.

  As a result, when the unique information recording medium runs out of free space, the unique information recording medium can hold unique information for appropriate content, and the output of the unique information can be speeded up. .

The invention of claim 5
The information recording apparatus according to claim 1,
The unique information control unit is configured to serve as both the unique information recording medium and the data recording medium, and to record the unique information on the data recording medium.

  Thereby, the unique information about all the content data recorded on the data recording medium can be output at high speed.

The invention of claim 6
The information recording apparatus according to claim 1,
The unique information control unit is configured to output unique information about the content data held in the unique information recording medium regardless of whether the data recorded on the data recording medium is readable. It is characterized by.

  Thereby, even when the content data necessary for generating the unique information is deleted or cannot be read out, the unique information can be output at high speed.

  According to the present invention, when unique information such as content hash is output, it is not necessary to read the content from the recording medium one by one and generate the unique information, thereby reducing the time required for security control and reducing the burden on the system. The unique information can be output even when data necessary for generating the unique information is deleted or cannot be read for some reason.

  Hereinafter, as an embodiment of the present invention, for example, based on a function called check-in / check-out of the NetMD standard, a copy of music data transferred from a personal computer, generation of the content hash, and output of the generated content hash An example will be described with reference to the drawings.

Embodiment 1 of the Invention
(Configuration of information recording / reproducing apparatus)
The information recording / reproducing apparatus according to the first embodiment of the invention is an example of an apparatus that replicates music data to a non-exchangeable recording medium such as a hard disk.

  As shown in FIG. 1, the information recording / reproducing apparatus 100 includes a NetMD control unit 110, a user interface control unit 120, a recording device 130, and a system control unit 140. Among these constituent elements, those other than the user interface control unit 120 are constituent elements provided in a conventional information recording / reproducing apparatus. Specifically, a hash information holding unit 122 and a hash information control unit 123 described later of the user interface control unit 120 are new components.

  The NetMD control unit 110 includes a USB interface that performs communication via the USB cable 410 and performs data communication with the personal computer 400.

  The user interface control unit 120 includes a content hash calculation unit 121, a hash information holding unit 122, a hash information control unit 123, a transmission / reception unit 124, and a transmission / reception unit 125, and generates and holds a content hash. It has become.

  The content hash calculation unit 121 specifies music data by using music data read from the recording medium (specifically, sound group information at 1/2 position and 3/4 position in the music data). Therefore, a content hash that is unique information (unique information) is generated.

  The hash information holding unit 122 is constituted by, for example, a volatile memory or a non-volatile memory, and holds the content hash.

  The hash information control unit 123 controls writing and reading of the content hash with respect to the hash information holding unit 122.

  The transmission / reception unit 124 transmits / receives data to / from the NetMD control unit 110. The transmission / reception unit 125 transmits / receives data to / from the system control unit 140 (transmission / reception unit 142).

  The recording device 130 records and reads data on a non-exchangeable recording medium such as a hard disk.

  The system control unit 140 includes an information input / output unit 141 and a transmission / reception unit 142 that transmits and receives content data, and the information input / output unit 141 controls recording and reading of the data performed by the recording device 130. It is like that.

  At the time of check-out, the personal computer 400 transfers music data and stores the content hash input from the information recording device, and at the time of check-in, confirms the identity between the music data to be deleted and the music data to be deleted. It is like that.

(Operation of information recording / reproducing device)
First, the operation at checkout will be described. In the following description, exchanges such as authentication that are normally performed are omitted.

  The personal computer 400 sends detailed information such as track attributes, data size, and track mode to the NetMD control unit 110 of the information recording / reproducing apparatus 100 via the USB cable 410.

  The NetMD control unit 110 outputs the detailed information to the user interface control unit 120 (transmission / reception unit 124), and the user interface control unit 120 transmits the detailed information to the system control unit 140 (transmission / reception unit 142) via the transmission / reception unit 125. ). Then, the information input / output unit 141 of the system control unit 140 sends the detailed information to the recording device 130.

  Next, the personal computer 400 transfers the music data to be copied to the NetMD control unit 110. The transferred music data is input to the system control unit 140 in the same manner as the detailed information, and the information input / output unit 141 records the music data on the recording medium of the recording device 130 based on the NetMD standard.

  When the copy of the music data of one song is finished, the content hash calculation unit 121 instructs the system control unit 140 to perform the 1/2 position (P1 Data) and 3/4 position of the music data recorded on the recording medium. Request to read the sound group information of (P2 Data). In response to this request, the system control unit 140 controls the recording device 130 to read out the sound group information and output it to the user interface control unit 120. The content hash calculation unit 121 generates a content hash uniquely obtained from the read sound group information, and outputs the content hash to the hash information control unit 123. For example, the hash information control unit 123 stores the content hash in the hash information holding unit 122 in association with information that associates music data on the recording medium such as a song name or song ID with the content hash, while NetMD control. The data is output to the personal computer 400 via the unit 110.

  The personal computer 400 stores the content hash in association with the music data stored in the personal computer 400.

  When a plurality of music data is continuously checked out, the content hash of each music data to be checked out is generated as described above and output to the personal computer 400, while being hashed in association with the music data. It is held in the information holding unit 122.

  Next, an operation for checking in the checked out music data will be described.

  FIG. 2 shows the flow control between each component of the personal computer 400 and the information recording / reproducing apparatus 100 at the time of check-in. Each control step is executed in the order of S101, S102, S103, and S104, and the operation of each control step is as follows.

  [S101] The personal computer 400 sends information requesting a content hash to the NetMD control unit 110.

  [S102] The NetMD control unit 110 outputs this request to the user interface control unit 120.

  [S103] In response to the request, the hash information control unit 123 of the user interface control unit 120 reads the content hash from the hash information holding unit 122 and outputs the content hash to the NetMD control unit 110.

  [S104] The NetMD control unit 110 outputs the content hash to the personal computer 400.

  After the control step of S104 is performed, the personal computer 400 compares the content hash stored in association with the music data with the content hash output by the information recording / reproducing apparatus 100 (NetMD control unit 110), so that the personal computer Check the identity of the stored music data and the music data recorded on the recording medium.

  When a plurality of music data are checked in successively, the operations after S101 are performed on each music data.

  As described above, according to the present embodiment, when a content hash of music data recorded on a recording medium is output to a personal computer, it is not necessary to read the music data from the recording medium one by one and generate a content hash. The time required for control can be shortened and the burden on the system can be reduced.

  In addition, even if the data necessary for generating the content hash is deleted from the recording medium of the recording device 130 or cannot be read for some reason, the content hash held in the hash information holding unit 122 is output. By doing so, check-in becomes possible.

<< Embodiment 2 of the Invention >>
The information recording / reproducing apparatus 200 according to the second embodiment of the invention does not use a non-replaceable recording medium such as a hard disk for the recording apparatus 130 as shown in the first embodiment. This is an example using a possible recording medium. In the following embodiments, components having the same functions as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 3, the information recording / reproducing apparatus 200 is different from the first embodiment in that the information recording / reproducing apparatus 200 includes a user interface control unit 220 instead of the user interface control unit 120. The user interface control unit 220 includes a content hash calculation unit 121, a transmission / reception unit 124, a transmission / reception unit 125, a disk ID / hash information holding unit 222, a hash information control unit 223, and a disk ID determination unit 224.

  The disc ID / hash information holding unit 222 is constituted by, for example, a volatile memory or a non-volatile memory, and the unique disc ID recorded on the recording medium loaded in the recording device 130 with the content hash and the content The hash is stored in association with each other.

  The hash information control unit 223 controls the disc ID determination unit 224 to input / output content hash to / from the disc ID / hash information holding unit 222.

  The disc ID discriminating unit 224, under the control of the hash information control unit 223, the disc ID read from the content hash via the system control unit 140, and information for linking the music data on the recording medium and the content hash Correspondingly writing to the disc ID / hash information holding unit 222, discriminating the disc ID of the recording medium loaded in the recording device 130, and discriminating the disc ID, the music data on the recording medium, and the content hash The content hash corresponding to the information to be linked is read out.

  In the information recording / reproducing apparatus 200 configured as described above, a content hash is generated in the same manner as in the first embodiment and output to the personal computer 400.

  Further, the disc ID of the recording medium loaded in the recording device 130 is output to the user interface control unit 220 via the system control unit 140 and held in the disc ID / hash information holding unit 222. The hash information control unit 223 causes the disc ID / hash information holding unit 222 to hold the content hash in association with the disc ID.

  When a plurality of music data are continuously checked out, a content hash of each music data is generated and output to the personal computer 400 and is associated with the disc ID, and a disc ID / hash information holding unit. 222.

  For example, when the recording medium is exchanged to copy music data to another recording medium, the content hash is generated and the disc ID of the newly loaded recording medium is read in the same manner as described above. The content hash is output to the personal computer 400 and is stored in the disk ID / hash information storage unit 222 in association with the information such as the disk ID.

  When there is no more free space in the disk ID / hash information holding unit 222 for storing the content hash, for example, by deleting the content hash, a plurality of recently used recording media, a plurality of frequently used recording media, The content hash of the recording medium or a plurality of recording media selected by the user may be left in the disc ID / hash information holding unit 222. Thereby, the disc ID / hash information holding unit 222 can hold the content hash for the appropriate content, and the output of the content hash can be speeded up.

  Next, the operation at check-in will be described. The operation at the time of check-in in this embodiment is substantially the same as the flow control shown in FIG. 2, but the operation of step S103 in FIG. 2 is different (in this embodiment, this control step is changed to S203). And).

  That is, after the operations of S101 and S102 are performed by the start of check-in, the disk ID read via the system control unit 140 is output to the disk ID determination unit 224 in S203. The disk ID determination unit 224 determines the disk ID. Then, the content hash corresponding to the disc ID is read from the disc ID / hash information holding unit 222 and output to the hash information control unit 223. The hash information control unit 223 outputs the content hash to the NetMD control unit 110.

  After the above-described control step S203 is performed, the control step S104 is performed, and the personal computer 400 confirms the identity of the music data.

  When a plurality of music data are continuously checked in, a series of control steps S101, S102, S203, and S104 are performed a plurality of times.

  As described above, also in this embodiment, it is possible to reduce the time required for security control and reduce the burden on the system. In addition, even if the data necessary for generating the content hash is deleted or cannot be read for some reason, the content hash stored in the disk ID / hash information storage unit 222 is output. Check in.

In addition, since the recording medium is identified by the disc ID unique to the recording medium, the time required for outputting the content hash corresponding to the music data of the exchanged recording medium can be shortened even if a plurality of recording media are exchanged. be able to.
<< Embodiment 3 of the Invention >>
As described above, the information recording / reproducing apparatus 300 according to the third embodiment of the present invention does not hold the content hash in the volatile memory or the nonvolatile memory, but stores the content hash in the recording medium on which the music data is copied. This is an example of recording. It should be noted that any one of a replaceable recording medium and a non-replaceable recording medium can be applied to the present embodiment.

  As shown in FIG. 4, the information recording / reproducing apparatus 300 includes a user interface control unit 320 having a content hash calculation unit 121, a transmission / reception unit 124, and a transmission / reception unit 125 instead of the user interface control unit 120 of the first embodiment. Further, a system control unit 340 is provided instead of the system control unit 140.

  The system control unit 340 includes an information input / output unit 141, a transmission / reception unit 142, a hash information holding unit 342, and a hash information control unit 343.

  The hash information holding unit 342 is configured by, for example, a volatile memory or a nonvolatile memory, and temporarily holds the content hash.

  The hash information control unit 343 controls the writing and reading of the content hash with respect to the hash information holding unit 342, and further controls the reading of the content hash from the recording medium of the recording device 130.

  In the information recording / reproducing apparatus 300 configured as described above, when a checkout is performed, a content hash is first generated by the content hash calculation unit 121 as in the first embodiment. The generated content hash is output to the personal computer 400 via the NetMD control unit 110 and held in the hash information holding unit 342 under the control of the hash information control unit 343. When a plurality of music data are continuously checked out, a content hash of each music data to be checked out is generated as described above, output to the personal computer 400, and further held in the hash information holding unit 342. The

  The hash information control unit 343 records the content hash held in the hash information holding unit 342 on the recording medium of the recording device 130 via the information input / output unit 141 after the generation of the content hash is completed.

  Next, an operation when check-in is performed will be described.

  FIG. 5 shows the flow control between the components of the personal computer 400 and the information recording / reproducing apparatus 300 at the time of check-in. Each control step includes S201, S202. . . The operations are executed in the order of S209, and the operation of each control step is as follows.

[S201] The user interface control unit 320 sends information requesting a content hash to the system control unit 340. [S202] The system control unit 340 uses the hash information control unit 343 to record the recording medium of the recording device 130. The content hash held in is stored in the hash information holding unit 342.

  [S203] The system control unit 340 outputs a predetermined signal indicating completion of reading of the content hash to the user interface control unit 320.

  [S204] The personal computer 400 requests the NetMD control unit 110 to output a content hash.

  [S205] The NetMD control unit 110 outputs a content hash output request to the user interface control unit 320.

  [S206] The user interface control unit 320 requests the system control unit 340 to output a content hash.

  [S207] In response to the request, the hash information control unit 343 reads the content hash from the hash information holding unit 342 and outputs the content hash to the NetMD control unit 110.

  [S208] The user interface control unit 320 outputs the content hash output by the system control unit 340 to the NetMD control unit 110.

  [S209] The NetMD control unit 110 outputs the content hash output by the user interface control unit 320 to the personal computer 400.

  After the control step of S209 is performed, the personal computer 400 compares the content hash stored in association with the music data with the content hash output by the information recording / reproducing apparatus 300 (NetMD control unit 110), so that the personal computer 400 Check the identity of the stored music data and the music data recorded on the recording medium.

  When a plurality of music data are checked in, the operations after S204 are repeated.

  As described above, also in this embodiment, it is possible to reduce the time required for security control and reduce the burden on the system. Even if data necessary for generating the content hash is deleted or cannot be read for some reason, if the content hash can be read from the recording medium, it can be checked in.

  In addition, since the content hash is held in the recording medium to which the music data is duplicated, the content hash for all the duplicated music data can be output regardless of the capacity of the hash information holding unit in the information recording / reproducing apparatus. .

  The recording medium is not limited to the hard disk or the MD disk described in the above embodiment, and any recording medium can be used.

  Further, the content is not limited to music data, and may be image data, for example.

  In addition, the standard for duplication is not limited to the NetMD standard, and any content may be used as long as it identifies content using unique information such as a content hash.

  Further, the interface used for connecting the personal computer and the information recording / reproducing apparatus is not limited to the USB, and any interface can be used as long as it can transmit and receive data bidirectionally.

  The embodiment may be applied to an apparatus that does not have a playback function.

  When outputting unique information such as a content hash, the information recording apparatus according to the present invention does not need to read the content from the recording medium one by one and generate the unique information. It is possible to reduce the burden and to output the unique information even if the data necessary for generating the unique information is deleted or cannot be read for some reason. Therefore, it is useful as an information recording apparatus or the like that outputs unique information for specifying content recorded on a recording medium and performs security control such as copyright protection.

It is a block diagram which shows the structure of Embodiment 1 of this invention. It is a figure which shows the flow control between each component of a personal computer and a recording / reproducing apparatus at the time of check-in of Embodiment 1 of this invention. It is a block diagram which shows the structure of Embodiment 2 of this invention. It is a block diagram which shows the structure of Embodiment 3 of this invention. It is a figure which shows the flow control between each component of the personal computer and the recording / reproducing apparatus at the time of check-in of Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Information recording / reproducing apparatus 110 NetMD control part 120 User interface control part 121 Content hash calculation part 122 Hash information holding part 123 Hash information control part 124 Transmission / reception part 125 Transmission / reception part 130 Recording apparatus 140 System control part 141 Information input / output part 142 Transmission / reception part 200 Information Recording / Reproducing Device 220 User Interface Control Unit 222 Disc ID / Hash Information Holding Unit 223 Hash Information Control Unit 224 Disc ID Determination Unit 300 Information Recording / Reproducing Device 320 User Interface Control Unit 340 System Control Unit 342 Hash Information Holding Unit 343 Hash Information Control unit 400 PC 410 USB cable

Claims (6)

An information recording device for recording content data input from another device on a data recording medium,
When content data is recorded on the data recording medium, using the content data, a unique information generating unit that generates unique information for identifying the content data;
When the generated unique information is held in the unique information recording medium and the content data recorded on the data recording medium is specified in the other device, the unique information about the content data is stored in the unique information. A unique information control unit that reads from the recording medium for information and outputs to the other device;
An information recording apparatus comprising: The information recording apparatus according to claim 1,
The information recording apparatus, wherein the unique information recording medium is a volatile memory or a nonvolatile memory provided in the information recording apparatus. An information recording apparatus according to claim 2, wherein
The data recording medium is an exchangeable recording medium,
The unique information control unit is configured to hold and output unique information about the content data in association with identification information for identifying a data recording medium on which the content data is recorded. Information recording device. An information recording apparatus according to claim 3, wherein
When the unique information control unit erases the already recorded unique information in order to record new unique information, the last use date and time of the data recording medium is old, the use frequency is low, or the information recording An information recording apparatus configured to erase unique information about content data recorded on a data recording medium designated by a user of the apparatus. The information recording apparatus according to claim 1,
The information recording apparatus, wherein the unique information control unit is configured to use both the unique information recording medium and the data recording medium and record the unique information on the data recording medium. The information recording apparatus according to claim 1,
The unique information control unit is configured to output unique information about the content data held in the unique information recording medium regardless of whether the data recorded on the data recording medium is readable. An information recording apparatus characterized by that.

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