JP3332361B2 - Data conversion device, data conversion method, and program storage medium in data copyright protection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copyright protection system for digital data, and more particularly, to copying and recording music data such as a music CD on a portable recording medium such as a semiconductor memory, the same as network distribution. The present invention relates to a data conversion apparatus and method in a copyright protection system that can unify subsequent processing by converting the data into a format and perform primary recording, and furthermore, protect copyright. In the above copyright protection system, electronic music distribution (EMD: Electronic
Music Distribution) encrypted data is primarily recorded on a hard disk such as a personal computer,
Unencrypted music data obtained via a package such as a CD is also once converted into an encryption format similar to that used for electronic music distribution, and then temporarily recorded in a hard disk such as a personal computer. By performing secondary recording after converting the data into another unified encryption format, it is possible to collect an appropriate copyright fee even for a copy from a CD or the like.

[0002]

2. Description of the Related Art In recent years, the distribution of music data and the like has been dominated by disk media such as compact disks (hereinafter referred to as CDs). However, CDs are hardly protected against piracy, that is, illegal copying. Also, based on a music CD, a CD-R (Compac
Devices that can easily create Disc Recordables are also on the market, and in many cases anyone can make a copy of the original based on the original, and audio devices that still have insufficient copyright protection are mainstream. Is the current situation.

[0003] In addition, a form in which a CD is dropped on an MD (Mini Disc) for viewing is also widespread. At this time, there is a problem that the copyright holder is disadvantaged as a result of considerably passing the copy to another person beyond the range of personal enjoyment. In order to improve such a situation, Japanese Patent Application Laid-Open No. 9-34841 discloses a method in which a CD storing encrypted software is distributed, and a decryption key is distributed online in response to a request from a user. A billing system is disclosed.

[0004]

However, in the prior art disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-34841, it is necessary to contact the center in order to obtain the decryption key even in the range of personal enjoyment. It can be said that the user is disadvantaged because the user is charged or charged. Also, since the equipment already used by the user is intended for CDs on which unencrypted software is recorded, the equipment cannot be used unless a separate playback device for encrypted CDs is purchased. It implies a heavy burden.

Accordingly, the present invention has been made in view of such conventional problems, and has been made in consideration of ordinary music CDs and DVs.
Even if digital data that is not encrypted in a super-distribution format is obtained through distribution of a package medium such as D-Audio (DVD-Audio), the copyright is protected and the content is beyond the scope of personal enjoyment. By collecting an appropriate copyright fee when making copies, we will develop copyright protection technologies and mechanisms that can effectively utilize the same CD assets as in the case of electronic music distribution (EMD), and seek the rights of copyright holders. It is an object of the present invention to provide a copyright protection system having a software medium and a device in consideration of protection, and a method thereof.

[0006]

According to a first aspect of the present invention, data including audio contents is converted into data in a super-distribution format, and output to an external recording device for recording. To provide a data conversion device, the data in the super-distribution format, the audio content,
Attribute information indicating at least a billing condition for permitting copying of the audio content, the data conversion device performs data transmission and reception with an external device,
Data format determination means for determining whether the received data is already the data of the super-distribution format, and identifies the received audio content, from an external device the attribute information corresponding to the identified audio content, Attribute information acquiring means for acquiring via the data transmitting / receiving unit, data converting means for converting the audio content into the data in the super distribution format together with the acquired attribute information, the data transmitting / receiving means, the data format determining means, Control means for controlling the attribute information acquisition means and the data conversion means, the control means, when it is determined by the data format determination means that the received data is not the data of the super-distribution format, received The attribute information is acquired such that the attribute information corresponding to the audio content of the data is obtained from outside. Controlling the information acquiring means, controlling the data converting means to convert the acquired attribute information and the received audio content into the data in the super-distribution format, and converting the converted data in the super-distribution format to the Output to an external recording device.

According to a second aspect of the present invention, there is provided a data conversion method for converting data including audio contents into data in a super-distribution format, and outputting the data to an external recording step for recording. The audio content, and attribute information indicating at least a charging condition for permitting copying of the audio content. The data conversion method includes a data transmission / reception step of transmitting / receiving data to / from an external device; A data format determining step of determining whether or not the data is in a distribution format; identifying the received audio content; and an attribute information acquiring step of acquiring the attribute information corresponding to the identified audio content from an external device; Data for converting audio content into the super-distribution format data together with the acquired attribute information. Data conversion step, the data transmission / reception step, the data format determination step, the attribute information acquisition step, and a control step of controlling the data conversion step, and the control step is performed when the received data is in the super-distribution format. If it is determined by the data format determination step that the data is not data, the attribute information acquisition step is controlled so as to externally acquire the attribute information corresponding to the audio content of the received data, and the acquired attribute information and The data conversion step is controlled so as to convert the received audio content into the data in the super-distribution format, and outputs the converted data in the super-distribution format to the external recording step.

In a third aspect of the present invention, a data conversion processing program storing a processing program of a data conversion method for converting data including audio contents into data in a super-distribution format, and outputting the data to an external recording step for recording. A medium, wherein the data in the super-distribution format includes the audio content and attribute information indicating at least a charging condition for permitting copying of the audio content; and the data conversion method includes transmitting and receiving data to and from an external device. A data transmission / reception step, a data format determination step of determining whether or not the received data is already the data in the super-distribution format, and identifying the received audio content, from an external device corresponding to the identified audio content An attribute information obtaining step of obtaining attribute information; and A data conversion step of converting the data into the super-distribution format together with the obtained attribute information, and a control step of controlling the data transmission / reception step, the data format determination step, the attribute information acquisition step, and the data conversion step, The control step, if the received data is determined not to be data in the super-distribution format by the data format determination step, to obtain the attribute information corresponding to the audio content of the received data from outside, Controlling the attribute information obtaining step, controlling the data conversion step so as to convert the obtained attribute information and the received audio content to the data in the super-distribution format, and converting the data in the converted super-distribution format. Output to the external recording process.

According to the present invention, a normal music CD or DVD
Even if digital data that is not encrypted is obtained through distribution of package media such as audio, the copyright must be protected and appropriate copyright fees must be paid when making copies beyond the scope of personal enjoyment. , CD assets common to those for electronic music distribution (EMD) can be effectively used.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an outline of a music data distribution service mode according to the present invention. Representative examples of data distribution routes include distribution of music data via the Internet and distribution of package media such as CDs and DVDs. There is a route for distributing normal music data.
Via the Internet, encrypted music data including billing information is distributed to the user via a telephone modem or the like,
It is primarily recorded on a hard disk such as a user's personal computer.

[0011] On the other hand, in an ordinary system via distribution of package media, unencrypted music data content is obtained by a user via a disk drive (not shown) or the like. The user temporarily records the obtained data on the hard disk of the personal computer using dedicated application software (PC player software). At this time, by adding accounting information and the like described later to the data and encrypting the data, the data is primarily recorded in the same format as the music data distributed over the Internet or the like. This allows
Convenience via the Internet, that is, a feature that it is easy to select various kinds of songs by searching an interactive music data (song) database, and convenience through distribution of package media, that is, inexpensive distribution A data distribution / distribution mode 0 having both features that music and related information can be easily obtained and sold via a route is formed.

Here, the dedicated application software includes downloading of music data, primary recording on a hard disk of a PC, secondary recording on a portable recording medium, fetching data from a package medium such as a CD, and charging processing. This software is hereinafter referred to as PC player software.

Here, the encrypted data primarily recorded on the hard disk of the user's personal computer (PC) is converted into another unified (not including billing information) encrypted format in the secondary recording process for duplication. Is converted to a secondary recording medium, such as a semiconductor memory card (Memory Card) or DV.
An audio player (Audio Player) that is secondary-recorded in a D-RAM or the like and plays a semiconductor memory card, or a DVD audio player that plays a DVD-RAM
(DVD-Audio Player) or the like, and music content is generally viewed.

(Embodiment 1) FIG. 2 is a block diagram showing a first embodiment of a digital data copyright protection system according to the present invention. And an apparatus 121. The first data converter 101 is connected to a host computer (not shown) of a management center that controls the system via an online network, and the second data converter 121 is connected to a PCMCIA (Personal Computer) described later.
It is connected to the first data converter 101 via a Memory Card International Association (BUS) bus or the like, and functions as an external recording device. Here, the system management center has a database of customer information and billing information and a database of music data of the copyright holder in a server, and supervises customer management, billing management and sales management, shipping processing, and the like. I do. The first data converter 101
Acquires attribute information corresponding to audio content, which will be described later, from a server (not shown) of the system management center via the digital network and the data transmission / reception unit 102. The data transmitting / receiving section 102 has at least a network interface section 116.

As described above, in this system, data is distributed via the Internet, and a CD
The first data conversion device 101 is generally realized by a personal computer (hereinafter, referred to as a PC). The components of the first data conversion device 101 include a data transmission / reception unit 102, a data format determination unit 103, a data compression conversion unit 104, an attribute information addition device 105, a first encryption circuit 106, a user ID addition device 107, First recording device 1
08, the primary recording medium 109, the data extracting unit 110, the first
, A data output unit 112, a charging unit 113, a user ID generation and holding unit 114, and a control unit 115 for controlling each component of the entire apparatus. By installing the PC player software, the first data conversion apparatus 101 having the above-described configuration primarily records encrypted music data including attribute information such as billing information, which will be described later, in a hard disk. The data is taken out, converted into another unified encryption format by the second data conversion device 121, and then secondary recorded (for duplication).
In the above configuration, the data format determination unit 103 determines whether the received data is data in a super-distribution format.

In the present embodiment, the second data converter 121 is constituted by, for example, a PCMCIA card adapter, and includes a data receiving unit 122, a second decoding circuit 123,
First authentication section 124, second encryption circuit 125, second recording device 126, second authentication section 127, secondary recording medium 1
28. Note that the second authentication unit 127 and the secondary recording medium 128 are integrated into a semiconductor memory card (SD Memory Car).
d), the memory card is detachable from the second data conversion device 121, and the portable player (SD-Au
dio Player) can be used to play and watch audio data. Here, the second authentication unit 127 functions as a controller, and intervenes between the secondary recording medium 128 and the first authentication unit 124 to transmit a command / response described below with the first authentication unit 124. Do. The secondary recording medium 128 is an EEPROM (Electrically Erasable Progra
It comprises a flash memory such as an mmable read-only memory. Note that the second data conversion device 121
In the present embodiment, is configured with a PCMCIA card adapter, but it can also be configured with a DVD-RAM drive or the like so as to be applicable to a DVD audio player.

In the following description, in the present embodiment, it is assumed that the data to be recorded is music data, and the music data is available as super-distribution data distributed through the Internet and is stored on a disk medium such as a CD. Normal (unencrypted) data recorded is CD
The description will be made assuming that the data is input to the first data converter 101 via the drive. Here, the super distribution data is
It is distribution data that is encrypted in an AAC (Advance Audio Coding) format, which will be described later, and includes attribute information such as charging conditions, and the encryption is released (decrypted) by completing the charging process. Therefore, it is not charged for owning the super-distribution data itself, but for being charged for copying and using the data. In addition, this super distribution data is distributed to others (secondary distribution)
It is also possible to provide a privilege to the user of the distribution source by specifying the user from which the secondary distribution is made by the user ID information to be described later when secondary distribution to another person is performed.

FIG. 3 shows a case where such encrypted music data distributed on the Internet is recorded on the primary recording medium 109 or unencrypted music data obtained from a CD is processed by an appropriate data processing. The following shows a data structure in bit units showing an example of the data structure when the data is recorded on the primary recording medium 109 in the same encryption format as the encrypted data distributed on the Internet after the above.

In FIG. 3, in the case of encrypted super-distributed music data distributed via the Internet, the user I
D201 (24 bits) is user-specific identification information generated and held by the user ID generation and holding unit 114 in the PC shown in FIG. 2 when software for operating the copyright protection system is installed in the PC 101. It is. Only the information of the user ID is ID information generated and added in the PC when the encrypted music data is recorded on the primary recording medium 109. That is, the user ID 201
Attribute information 202 to 206 and content 207 other than
Is music data distributed from the database of the host computer center via the Internet. The user ID 201 is information that specifies from which user the data that has been secondarily distributed is, and is one of data based on the concept of super-distribution.

The ISRC information 202 (24 bits) indicates unique information for each music data.
The RC (International Standard Recording Code) is composed of a country code (two ASCII characters), an owner code (three ASCII characters), a recording year (two digits), and a serial number (five digits). A unique code is attached, and music data can be specified from this ISRC information.

The copy control information 203 (1 bit) is information indicating whether copying of the music data to the secondary recording medium 128 is permitted or not permitted, and takes two values, that is, whether copying is permitted or not. For example, it takes a value of "0" when copying is permitted, and takes a value of "1" when copying is not permitted. The encrypted information 204 (1 bit)
It is information indicating whether the music data is encrypted. It takes two values, encrypted and unencrypted. For example, it takes a value of "0" when it is not encrypted. , Take the value of “1” when encrypted.
The billing information 205 (16 bits) indicates the billing amount for copying the music data. Here, "Yen"
In the following description, it is assumed that the charge amount is set in units of, but the present invention is not limited to this. For example, "dollar", "mark", and other charge units can be set. The content decryption key 206 (24 bits) is information storing a decryption key for decrypting the content 207 described later. The content 207 is data representing the music data body, and is encrypted as necessary.

Data other than the content 207 in FIG. 3, ie, the user ID 201 and the ISRC information 2
02, copy control information 203, encryption information 204, billing information 205, and content decryption key information 206 are hereinafter referred to as attribute information of music data. Since the attribute information includes important information such as a charge amount, it is desirable that the attribute information be encrypted so as not to be falsified. Hereinafter, in the present embodiment, the attribute information, that is, the user ID 201 and the I
SRC information 202, copy control information 203, encryption information 204, charging information 205, and content decryption key information 206
Is pre-encrypted in a predetermined encryption format,
The decryption (decryption) key for the attribute information is stored in a special area (not shown) of the PC player software for operating the copyright protection system according to the present embodiment. It can be used by installing software, and the decryption key of the attribute information is recorded in an area that cannot be accessed by a normal user operation. It is also assumed that the content 207 has been encrypted in advance in the predetermined encryption format, similarly to the attribute information.

On the other hand, music data recorded on a disk medium such as a music CD includes contents (music data body).
207 and the ISRC information 202 stored in the TOC pattern area are recorded together, and the content itself is not encrypted (CD format).

Hereinafter, the operation of the digital data copyright protection system according to this embodiment will be described. The data transmission / reception unit 102 receives music data obtained through the Internet or music data obtained from a music CD. For example, when music data is obtained through the Internet, the music data is received through a modem (not shown). When music data is obtained through a CD, the music data is received through a CD drive (not shown).

First, a case where music data is obtained through the Internet will be described. FIG. 4 shows an example of information displayed on a display unit (not shown) such as a display of the PC 101 when music data is obtained through the Internet. The information displayed includes:
The song title 301, the singer name 302, the price 303, the data source 304, and the like are contents that will motivate the user to purchase music data. Here, the song name 301 and the singer name 302 are information representing the song name and the singer name for the music data, respectively.

The price 303 represents the amount charged for the act of downloading the corresponding song and copying and recording it on the secondary recording medium 128. Data source 304
Is a database URL (Uniform Resource Locator) of the management center where the corresponding music is recorded in the present embodiment.
or) access information. Based on the information, the user operates an input unit (not shown) such as a mouse and a keyboard of the PC to select a desired song, and notifies a purchase request to the host computer via the data transmission / reception unit 102. be able to.

Next, the operation for obtaining unencrypted music data through a music CD will be described. At this time, information about the title of music data recorded in the TOC (table of contents) pattern area of the CD is simply displayed on the display unit of the PC. The user can use this song name information,
Alternatively, from the identification information described on a jacket or the like attached to the music CD, a favorite song is selected through an input unit (not shown) such as a mouse and a keyboard, and a title and a product code are input. The host computer is notified via the transmission / reception means 102. Here, the attribute information adding device 105 extracts information on the number of audio contents recorded on the disc and their respective reproduction times. Further, it connects to the host computer via the data transmitting / receiving unit 102 and transmits the extracted information. on the other hand,
The host computer identifies the corresponding disk based on the received information, and transmits the attribute information of the identified disk to the data transmitting / receiving unit 102. Thereby, the attribute information corresponding to the audio content recorded on the disc indicated by the identification information is received from the external server via the network interface.

In response to a user's purchase request, the data transmitting / receiving unit 102 connects to the host computer, specifies music data based on the ISRC information 202 of the TOC pattern obtained from the Internet or a CD, and performs secondary recording (copying). ) Is obtained from the database of the host computer. Based on the billing amount information, the user indicates whether or not to copy and record the music data on the secondary recording medium 128 finally. Note that the music data can be specified by a user directly inputting information for specifying a song instead of the TOC pattern.

The data format determining unit 103 determines whether the music data is encrypted or not, that is, whether the obtained data is super-distributed data, and based on the determination result, Determine the data acquisition route.
In the present embodiment, whether the music data received by the data transmitting / receiving unit 102 is obtained through the Internet,
The data format is determined depending on whether the data format is obtained through a music CD.

When the obtained music data is encrypted, that is, when it is determined that it is super-distributed data obtained through the Internet, the obtained data is transferred to the user ID adding device 107 as it is, and the user ID generation and holding unit 114 Is added to the encrypted music data, and then recorded on the primary recording medium 109 by the first recording device 108.

On the other hand, when the data format determining unit 103 determines that the obtained music data is not encrypted,
In other words, when it is determined that the data is not super-distributed data but obtained through a music CD, the obtained data is converted from an MPEG2-AAC (Moving Picture Experts Group 2A) by LPCM (Linear Pulse Code Modulation) described later.
after performing conversion processing to advanced audio coding (hereinafter, referred to as AAC) and appropriate encryption processing.
To record. That is, data obtained through a music CD is subjected to compression conversion of the content data by the data compression conversion unit 104 as necessary. In this compression conversion, music data generally recorded on a music CD is data in the LPCM format.
The data is compressed and converted into a C format or the like. This is because the secondary recording medium 128, which will be described later, uses a small semiconductor memory or the like, so that at present, the capacity is generally not as large as that of a CD. Can be compressed and recorded. If it is determined that the data has been obtained through a music CD, the data transmitting / receiving unit 1
02 receives the attribute information 202 to 206 of the corresponding music data from the database of the external host computer, and the attribute information adding device 105 adds the attribute information received from the external host computer to the compressed and converted music data. In the above configuration, the attribute information adding device 1
In step 05, the received audio content is identified as an audio content, and attribute information corresponding to the identified audio content is acquired from the external server via the data transmission / reception unit 102. The acquired audio content and attribute information are transmitted to the data compression
4. Attribute information adding device 105, first encryption circuit 106
Is converted into data in a super-distribution format via the above-mentioned method.

In the present invention, the primary recording medium 109 is not an essential component, and the received input data may be recorded on the secondary recording medium 128 of the external recording device without being primarily recorded on the hard disk of the PC. It is possible. In this case, the control unit 115 controls the data transmission / reception unit 102 and the attribute information addition device 105 so as to acquire the attribute information corresponding to the audio content of the data received from the music CD from the external database. Unit 104, attribute information adding device 105, first encryption circuit 1
06, etc., to convert the acquired audio content and attribute information into super-distribution format data, and to output the converted super-distribution format data directly to an external recording device. Control. The first encryption circuit 106 uses the encryption key corresponding to the content decryption key 206 shown in FIG.
7 is encrypted. Further, after the user ID 201 generated and held by the user ID generation and holding unit 114 in the PC is added to the encrypted music data by the user ID adding device 107, the attribute information 201 to 206 of the music data and the content 207 are added. Is the first recording device 108
Is recorded on the primary recording medium 109. As a result, the obtained CD music data is converted into a data format having the same data structure as the super-distribution data distributed on the Internet shown in FIG. 3, and encrypted in the same encryption format as the data distributed on the Internet. Primary recorded. The primary recording medium 109 is generally constituted by a hard disk of a personal computer, and records music data that the user desires to record on the secondary recording medium 128 in a state of being encrypted in the above-mentioned encryption format.

When music data is obtained from a music CD,
Regarding the super-distribution data structure shown in FIG.
The SRC information 202 may be configured to use the information recorded on the music CD as it is. In this case, the copy control information 203 and the charging information 205
02 is connected to the host computer via a computer 02 and obtained from the database of the management center when the user indicates the purchase intention. That is, based on the ISRC information 202, the corresponding attribute information 203, 205 is obtained from the host computer.

As for the encryption of the content data, the content decryption key 206 can be obtained from the host computer to create the encryption key. However, if it is desired to change the encryption key for each music data, here The first encryption circuit 106 creates an encryption key based on the ISRC information unique to the music data and
Can be encrypted, and a decryption key based on the encryption key created at this time can be used as the content decryption key 206. The flag “1” indicating that the content is encrypted is set in the encryption information 204 by performing the content encryption processing.

FIG. 5 shows the contents of a file for managing data on the primary recording medium 109. The index number 401 is a number assigned in ascending order for each music data recorded in the primary recording medium 109. That is, the example of FIG. 5 shows that seven music data are recorded in the primary recording medium 109. The start address 402 and the end address 403 are information indicating where the music data is recorded in the primary recording medium 109, and are managed by sector numbers. By updating the information shown in FIG. 5 at the time of recording, the primary recording medium 10 is updated.
When there is a music data take-out request from the music data 9, the recording position of any music data can be specified.

Returning to FIG. 2, the data extracting unit 110 extracts data to be recorded on the secondary recording medium 128 from the primary recording medium 109. At this time, referring to the management information in the file shown in FIG. 5, the recording position of the data to be recorded in the primary recording medium 109 is specified and extracted.

The first decoding circuit 111 decodes the data extracted by the data extracting section 110. This is a decryption (decryption) process for the encryption format of the super-distribution data received via the Internet. At this time, as described above, the attribute information (or the attribute information and the content information) is decrypted with the decryption key stored in the software for operating the copyright protection system. Of the data decrypted by the first decryption circuit 111, at least the user ID 201 and the ISR of the decrypted attribute information
The C information 202 and the billing information 205 are sent to the billing processing unit 113. The billing processing unit 113 calculates an appropriate billing amount based on the billing information 205 in the decrypted attribute information, and the billing amount is transmitted to the host computer of the management center through the data transmitting / receiving unit 102. That is, the control unit 1
15 controls the charging processing unit 113 and controls the primary recording medium 10
When the copy of the data in the super-distribution format read from 9 is output to and recorded on the external recording device (121), the charging processing unit 113 works together with the charging processing device of the external management center based on the charging conditions. Perform data accounting.

On the other hand, of the data output from the first decryption circuit 111, the content decryption key 206 shown in FIG.
And the content 207 are transmitted to the second data conversion device 121 via the data output unit 112. Here, the connection between the data output unit 112 of the first data conversion device 101 and the data reception unit 122 of the second data conversion device 121 is based on the PCM of the personal computer in the present embodiment.
This is realized by the CIA bus.

As described above, the first data converter 10
According to 1, it is possible to convert the data obtained from the music CD into the same encryption format as the super-distribution data obtained through the Internet, and then output the data to the second data converter 121 for duplication.

Next, the operation of the second data converter 121 will be described. In the present embodiment, it is assumed that the second data conversion device 121 is generally realized by a PCMCIA card adapter. The data receiving unit 122 includes the content data 207 output from the data output unit 112 of the first data conversion apparatus 101 and the content decryption key 206
To receive.

The second decoding circuit 123 decodes the content 207 in the data received by the data receiving section 122. At this time, since the decryption key necessary for data decryption is stored in the music data as the content decryption key 206 as described above, this is used to decrypt the content 207.

Next, a procedure for encrypting and recording the decrypted content data based on the identification information unique to the secondary recording medium 128 will be described. The first authentication unit 124
Confirms the validity of the secondary recording medium 128,
It is fixed in the second data conversion device 121. Second
Similarly, the authentication unit 127 confirms the validity of the secondary recording medium 128 and is integrated with the secondary recording medium 128. For example, when the secondary recording medium 128 is a removable medium, the second authentication unit 127 is fixed in the secondary recording medium 128 in an integrated configuration.

Next, an authentication method will be described. Here, the first authentication unit 124 transmits a specific command to the second authentication unit 127 having the function of the controller, and the second authentication unit 127 transmits a response command to the first authentication unit 1.
Authentication is performed by replying to C.24.

FIG. 6 shows an example of such a command response. First, the first authentication unit 124
A Send (UserID) command is transmitted to the second authentication unit 127. The Send (UserID) command is sent to the first data conversion device 1
At 01, the user ID information unique to the user PC 101 created and added by the user ID generation and holding unit 114 when the software of the copyright protection system is installed is extracted from the music data and transmitted to the second authentication unit 127. To do so. If the ID information transmitted at this time is authenticated as being valid, the second authentication unit 127 transmits the Send (Devic
eID) command to the first authentication unit 124. here
The Send (DeviceID) command is transmitted to the second data converter 12
1 indicates that the unique ID information is transmitted to the first authentication unit 124. If the transmitted ID information is authenticated at this time, the first authentication unit 124
7, a Request (MediaID) command is transmitted. This command is a command for requesting transmission of identification information unique to the secondary recording medium 128. In response to this command, the second authentication unit 127 obtains identification information unique to the secondary recording medium 128, and sends it to the secondary recording medium 12 as a Send (MediaID) command.
The unique identification information is transmitted to the first authentication unit 124.

As described above, first, authentication is performed by mutually transmitting the unique ID information of the first authentication unit 124 and the second authentication unit 127, and only when it is determined that the device is valid as a result, , The identification information unique to the secondary recording medium 128 is obtained.

The second encryption circuit 125 acquires the unique identification information of the secondary recording medium 128 obtained by the first authentication unit 124, generates an encryption key based on the unique identification information, and Encrypt. The encrypted data primarily recorded on the primary recording medium 109 may be encrypted by a different encryption method for each data acquisition path,
By the encryption processing by the second encryption circuit 125, the data is converted into data encrypted based on the identification information unique to the secondary recording medium 128. The method of generating and encrypting the encryption key based on the unique identification information is disclosed in Japanese Patent Application Laid-Open No. 5-257816, and the detailed description is omitted here. As described above, data recorded on the secondary recording medium 128 via the second recording device 126 is converted into encrypted data based on identification information unique to the secondary recording medium 128. Further, the secondary recording medium 12
8 is encrypted with the identification information unique to the secondary recording medium 128, even if an attempt is made to illegally copy the data, the data will not be correctly decrypted during reproduction.
Data copyright is protected.

As described above, in the present embodiment, the second recording device 126 records the data encrypted by the second encryption circuit 125 on the secondary recording medium 128, and the secondary recording medium 128 A medium removable from the second data converter 121 is used. The operation of the digital data copyright protection system configured as described above will be described below with reference to the flowcharts of FIGS.

First, the operation of the first data converter 101 will be described with reference to the flowchart of FIG. The data transmitting / receiving unit 102 receives the music data (S601). The data format determination unit 103 determines whether the data is encrypted (S602). If the data is not encrypted, the data compression conversion unit 104 performs data compression conversion (S603) and adds attribute information. After that, the content data is encrypted by the first encryption processing unit 106 (S604). After adding the user ID to the data encrypted by the encryption processing unit,
It is recorded on the primary recording medium 109 (S605). The data determined to be encrypted by the data format determination unit 103 is recorded on the primary recording medium 109 after the user ID is directly added (S605).

Next, in accordance with the user's secondary recording request, the data extracting unit 110 extracts data from the primary recording medium 109 (S606), and the first decryption processing unit 11
In step 1, the attribute information and the content data are decrypted (S607). The decrypted content data is output by the data output unit 112 (S608). On the other hand, an appropriate charging amount is calculated from the charging information in the decrypted attribute information, and the charging amount is transmitted to the host computer (S60).
9), end the processing.

Next, the operation of the second data converter 121 will be described with reference to the flowchart of FIG. The data receiving unit 122 is used for the first data converter 10
1 (S701), the second decryption processing unit 123 decrypts the content 207 part (S702). Next, the first authentication unit 124 transmits the user ID 201 in the data to the second authentication unit 127, and the second authentication unit 127 transmits the user ID 201
Is determined to be valid (S703). If it is determined that it is not valid, the process ends. If it is determined that the device ID is valid, the second authentication unit 127 transmits its own device ID (DeviceID) to the first authentication unit 124, and the first authentication unit 124 transmits the transmitted device ID. Is determined to be valid (S704). If it is determined that it is not valid, the process ends. If it is determined to be valid, the second authentication unit 127 sends the secondary recording medium 1
Requesting the acquisition of unique identification information (MediaID)
The authentication unit 127 acquires the identification information unique to the secondary recording medium 128 and transmits it to the first authentication unit 124 (S70).
5). The second encryption processing unit 125 encrypts the content 207 based on the acquired identification information unique to the secondary recording medium 128 (S706), records the content 207 on the secondary recording medium 128 (S707), and ends the processing. . This concludes the description of the digital data copyright protection system according to the first embodiment of this invention.

(Embodiment 2) Next, a digital data copyright protection system according to a second embodiment of the present invention will be described. Since the digital data copyright protection system according to the second embodiment has the same configuration as the digital data copyright protection system of the first embodiment, only the differences from the first embodiment will be described here. I decided to. The second embodiment is different from the copyright protection system of the first embodiment in that the charge amount can be changed according to the decoding format (compression format) of the music data. That is, when the music CD data is subjected to compression conversion processing and primary recording, the user is presented with the decoding format of the compression conversion and the billing amount in each format, and the user performs an appropriate compression conversion based on the information. The decoding format can be selected.

FIG. 9 is a diagram showing the relationship between such a compression conversion method and the billing amount. Song name 301, singer name 302,
Since the price 303 and the data source 304 have already been described with reference to FIG. 3 in the first embodiment, the description is omitted here. The compression format 801 indicates a decoding (compression) format of music data, and displays a decoding format such as the above-described LPCM and AAC. The user has the compression format 801 and the price 30
3, an appropriate decoding format is selected. This concludes the description of the second embodiment of the present invention.

Next, a digital data copyright protection system according to a third embodiment of the present invention will be described. (Embodiment 3) The digital data copyright protection system according to the third embodiment has almost the same configuration as the digital data copyright protection system of the first embodiment. Only the differences from the above embodiment will be described, and the same components will be described with the same reference numerals added.

FIG. 10 is a diagram showing the configuration of a digital data copyright protection system according to the third embodiment. The first data conversion device 101 has the same configuration as the first data conversion device 101 described in the first embodiment, and a description thereof will be omitted.

The second data conversion device 121 includes a data reception unit 122, a second decryption circuit 123, a first authentication unit 124, a third encryption circuit 125, and a second recording device 126. , The second authentication unit 127, and the secondary recording medium 12
8 is the same as that of the first embodiment, and is different in that it further has a recording data management information temporary storage device 901 and a recording permission determination unit 902. The third embodiment is different from the first embodiment in that information of recorded music data and information of a secondary recording medium 128 on which music data is recorded can be temporarily stored in the second data conversion device 121. different.

Recording data management information temporary storage device 901
Manages the music data recorded by the second data converter 121. FIG. 11 shows a data structure diagram of such management information. The number of entries 1001 indicates the number of music data recorded in the recording data management information temporary storage device 901 and takes an integer value of 0 or more. Hereinafter, data is added to the entries # 1 to #N by the number of registered entries. ISRC information 1005 is ISRC information of music data to be recorded. Hereinafter, the identification information 1006 is a value of identification information unique to the secondary recording medium 128 for recording music data to be recorded. A compression format 1007 of the music data is also recorded as necessary. In this way, the recording data management information temporary storage device 901 can manage the music data recorded by the second data conversion device 121 and the secondary recording medium 128 on which the music data is recorded. .

Here, a case where the same user records the same music data on different secondary recording media 128 will be described. In the case of the present embodiment, the recording permission determination unit 90
2 performs the following three types of processing. (1) When the secondary recording medium 128 is different, recording of music data is not permitted. (2) When the secondary recording medium 128 is different, music data in another recording medium that has already been recorded can be deleted. Permit recording. (3) Secondary recording medium 1
If 28 is different, collect the appropriate copyright fee.
It is on the street. In the following description, different secondary recording media 128 will be referred to as secondary recording media 128A, secondary recording media 12
8B.

First, the music data is transferred to the secondary recording medium 128A.
When recording in the recording data management information temporary storage device 90
No. 1 confirms that the music data to be recorded is unrecorded, that is, that no music data corresponding to the recording data management information temporary storage device 901 is recorded, and that the ISRC information 1005 of the music data and the secondary Recording medium 128A
Will be recorded.

Next, the same music data is stored in the secondary recording medium 1.
When recording to the 28B, the ISRC information 1005 is searched from the information in the recording data management information temporary storage device 901, and it is confirmed that there is matching information, that is, that the music data to be recorded is already recorded. Next, by referring to the identification information 1006, it is confirmed whether or not it matches the identification information of the secondary recording medium 128B. If they match, the recording permission determination unit 902 determines that the secondary recording medium 128B
Allow recording of music data to

If they do not match, it is determined that a malicious user may generate a so-called grandchild copy. (1) Recording is not permitted, a message that recording is not possible is displayed on the display means, and the process is terminated. I do. (2) After erasing the music data recorded on another recording medium (secondary recording medium 128A in the present embodiment) which has already been recorded, the recording operation on secondary recording medium 128B is performed again. Sometimes allow recording. That is, when the music data is erased from the secondary recording medium 128A, the music data is erased from the recording data management information temporary storage device 901 so that recording is possible. (3) An appropriate billing amount is presented to the user, and if the user agrees, a billing process is performed to permit recording on the secondary recording medium 128B. This concludes the description of the digital data copyright protection system according to the third embodiment.

The above embodiment has been described only as an example of a system in which the best effects can be expected at present. The present invention can be practiced and changed without departing from the gist of the present invention, and specifically, the following changes can be made.

In this embodiment, the secondary recording medium 128
Has been described as a semiconductor memory.
It can be replaced with an optical disk such as a D-RAM or a hard disk.

In this embodiment, the description has been given assuming that the digital data is downloaded from the host computer when the user requests the purchase. However, the digital data is temporarily stored in the primary recording medium 109 in the user's PC regardless of the purchase. A form in which the data is recorded and the purchase procedure is performed on the digital data recorded on the primary recording medium 109 is also conceivable.

In the present embodiment, the digital data copyright protection system has been described as a personal computer. However, the present invention is not limited to this, and is realized by a so-called STB (Set Top Box) for recording broadcast programs. It is also possible.

In the present embodiment, description has been made assuming that copy control information is described in attribute information.
It can also be embedded in digital data in the form of a ter Mark (electronic watermark).

Although the description has been made on the assumption that the billing information is transmitted to the center online, it is also possible to record the billing information once in the primary recording medium 109 and transmit the billing information to the center in an appropriate period.

In the present embodiment, the information provided by the information provider has been described as music information. However, the present invention is not limited to this. Video information, audio information, character information, or video information, audio information, and character information Of course, a combination of the above may be used.

[0068]

As described above, according to the data converter in the copyright protection system of the present embodiment, unencrypted music data recorded on a music CD or the like is also converted into a network distribution data format. By performing the conversion and the primary recording, data can be handled in the same manner as network distribution, and when creating a copy beyond the range of personal enjoyment, an appropriate copyright fee can be collected, and the effect is large.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an outline of a music data distribution service mode of the present invention.

FIG. 2 is a block diagram showing a configuration of a digital data copyright protection system according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a data structure of music data recorded on a primary recording medium.

FIG. 4 shows information displayed when music data is purchased through the Internet in the first embodiment of the present invention.

FIG. 5 is a data management file for recording music data on a primary recording medium.

FIG. 6 is a diagram showing an authentication procedure according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing the operation of the first data conversion device according to the first embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the second data conversion device according to the first embodiment of the present invention.

FIG. 9 shows information displayed when purchasing music data via the Internet in the second embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a digital data copyright protection system according to a third embodiment of the present invention.

FIG. 11 is a diagram showing a data structure of data recorded in a recording data management information temporary storage device.

[Explanation of symbols]

 Reference Signs List 101 first data conversion device 102 data transmission / reception unit 103 data format determination unit 104 data compression conversion unit 105 attribute information addition device 106 first encryption circuit 107 user ID addition device 108 first recording device 109 primary recording medium 110 data Extraction unit 111 First decoding circuit 112 Data output unit 113 Billing processing unit 114 User ID generation and holding unit 115 Control unit 116 Network interface 121 Second data conversion device 122 Data reception unit 123 Second decoding circuit 124 First Authentication section 125 second encryption circuit 126 second recording device 127 second authentication section 128 secondary recording medium 201 user ID 202 ISRC information 203 copy control information 204 encryption information 205 charging information 206 content decryption key 207 content 901 Recording data management information temporary storage device 902 Recording permission determination unit 1001 Number of entries 1002 Entry # 1 1003 Entry # 2 1005 ISRC information 1006 Identification information 1007 Compression format

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI G06F 17/60 332 G06F 17/60 332 G10K 15/02 G10K 15/02 H04L 9/32 H04N 7/16 C H04N 7/16 H04L 9/00 673Z Examiner Takuya Hayakawa (56) References JP-A-10-177597 (JP, A) JP-A-10-116472 (JP, A) JP-A-11-283325 (JP, A) JP-A-11 -25595 (JP, A) JP-A-2000-200475 (JP, A) JP-A-9-160899 (JP, A) JP-A-2000-69452 (JP, A) JP-A 9-171658 (JP, A) Japanese Unexamined Patent Publication No. Hei 10-3745 (JP, A) Japanese Unexamined Patent Publication No. Hei 9-181910 (JP, A) Japanese Unexamined Patent Publication No. Hei 8-297919 (JP, A) Japanese Unexamined Patent Publication No. Hei 7-231423 (JP, A) JP, A) WO 98/25269 (WO, A1) Small memory Ru protect music copyright in the card, Nikkei Electronics, Japan, Nikkei BP, Inc., March 22, 1999, no. 739, pp. 49-53 (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 20/10-20/16 351 G11B 27/00-27/10 G06F 12/14 G06F 13/00 G06F 17/60 G10K 15/02 H04L 9/00 H04M 11/08 H04N 7/16

Claims (21)

(57) [Claims] 1. A data conversion device for converting data including audio content into data in a super-distribution format, and outputting and recording the data to an external recording device, wherein the data in the super-distribution format includes the audio content and Data conversion device for transmitting and receiving data to and from the outside, and whether the received data is already in the super-distribution format. Data attribute determination means for identifying the received audio content, and the attribute information corresponding to the identified audio content from an external device, via the data transmission and reception unit, attribute information acquisition means, The audio content is converted into the data in the super distribution format together with the acquired attribute information. A data conversion unit for converting the data transmission / reception unit, the data format determination unit, the attribute information acquisition unit, and the data conversion unit. If the data format determination unit determines that the data is not the format data, the attribute information acquisition unit is controlled so as to externally acquire the attribute information corresponding to the audio content of the received data, and the acquired attribute A data conversion device that controls the data conversion means to convert information and the received audio content into the data in the super-distribution format, and outputs the converted data in the super-distribution format to the external recording device. . 2. The data conversion device further includes a data output unit, wherein the control unit determines that the received data is the super-distributed format data by the data format determination unit. 2. The data conversion device according to claim 1, wherein the data output unit is controlled to output the received data in the super-distribution format to the external recording device. 3. The data conversion device further includes a recording unit that records the data in the super-distribution format, and a charging unit that performs a charging process based on a charging condition of the attribute information. When controlling the charging processing means and outputting and recording a copy of the data in the super-distribution format read from the recording means to the external recording device, based on the charging condition of the attribute information, 3. The data conversion device according to claim 2, wherein the data conversion device performs a charging process for data in a format. 4. The data transmission / reception means reads data from a disk medium on which data including audio content is recorded.
A read unit that reads the data; and a network interface unit that obtains the attribute information corresponding to the audio content from an external server via a digital network. Acquiring the identification information of the medium, transmitting the acquired identification information to the external server via the digital network, and the attribute corresponding to the audio content recorded on the disk medium specified by the identification information The data conversion device according to claim 3, wherein information is received from the server. 5. The data conversion apparatus according to claim 4, wherein said attribute information acquisition means acquires identification information of said disk medium by a user's input operation. 6. The identification information of the disk medium by extracting information on the number of the audio contents recorded on the disk medium and respective reproduction times, wherein the attribute information obtaining unit obtains the identification information of the disk medium. Data conversion device as described. 7. The network interface unit is connected to an external charging processing device via the digital network, and the charging processing unit performs charging processing together with the external charging processing device based on the charging information.
The data conversion device according to claim 4. 8. A data conversion method for converting data including audio content into data in a super-distribution format, and outputting and recording the data in an external recording step, wherein the data in the super-distribution format comprises: Attribute information indicating at least charging conditions for permitting copying of audio content, wherein the data conversion method comprises: a data transmitting / receiving step of transmitting / receiving data to / from an external device; and A data format determining step of determining the received audio content; an attribute information obtaining step of obtaining the attribute information corresponding to the identified audio content from an external device; and an attribute of obtaining the audio content. A data conversion step of converting the data together with information into the super-distribution format data; A control step of controlling the data transmission / reception step, the data format determination step, the attribute information acquisition step, and the data conversion step, wherein the control step includes determining that the received data is not the super-distributed data. If determined by the format determination step, the attribute information acquisition step is controlled so as to externally acquire the attribute information corresponding to the audio content of the received data, and the acquired attribute information and the received audio content A data conversion step of controlling the data conversion step so as to convert the data into the super-distribution format data, and outputting the converted super-distribution format data to the external recording step. 9. The data conversion method further includes a data output step, wherein the control step includes: when the received data is determined to be the super-distributed data by the data format determination step, 9. The data conversion method according to claim 8, wherein the data output step is controlled so as to output the received data in the super-distribution format to the external recording step. 10. The data conversion method further comprises: a recording step of recording the data in the super-distribution format; and a charging processing step of performing charging processing based on a charging condition of the attribute information. When controlling the charging process and outputting and recording a copy of the data in the super-distribution format read in the recording process to the external recording process, based on the charging condition of the attribute information, The data conversion method according to claim 9, wherein accounting processing of data in a format is performed. 11. The data transmitting / receiving step includes: reading out data from a disk medium on which data including audio content is recorded; and reading the attribute information corresponding to the audio content from an external server via a digital network. Receiving the identification information of the disk medium from the disk medium, and transmitting the acquired identification information to the external server via the digital network. The data conversion method according to claim 10, wherein the attribute information corresponding to the audio content recorded on the disk medium specified by the identification information is received from the server. 12. The attribute information obtaining step includes obtaining identification information of the disk medium by a user's input operation.
The data conversion method according to claim 11. 13. The attribute information acquiring step of acquiring identification information of the disk medium by extracting information on the number of audio contents recorded on the disk medium and respective reproduction times. Data conversion method described. 14. The network interface unit is connected to an external billing device via the digital network, and the billing process performs billing with the external billing device based on the billing information.
The data conversion method according to claim 11. 15. A data conversion processing program storage medium storing a processing program of a data conversion method for converting data including audio contents into data in a super-distribution format, and outputting and recording the data in an external recording step. The data in the distribution format includes the audio content, and attribute information indicating at least a charging condition for permitting copying of the audio content. The data conversion method includes: A data format determination step of determining whether or not the data is already in the super-distribution format; and attribute information for identifying the received audio content and acquiring the attribute information corresponding to the identified audio content from an external device. Acquiring step; and the attribute information of the acquired audio content. A data conversion step of converting the data into the super-distributed data, a control step of controlling the data transmission / reception step, the data format determination step, the attribute information acquisition step, and the data conversion step, If the data format determination step determines that the received data is not data in the super-distribution format, the attribute information obtaining step includes obtaining the attribute information corresponding to the audio content of the received data from outside. Controlling the data conversion step so as to convert the acquired attribute information and the received audio content into the data in the super-distribution format, and record the converted data in the super-distribution format in the external recording Data conversion processing program storage medium to be output to the process. 16. The data conversion process further includes a data output step, wherein the control step includes a step of, when the received data is determined to be the super-distributed data by the data format determination step, 16. The data conversion processing program storage medium according to claim 15, wherein said data output step is controlled so as to output the received data in the super-distribution format to said external recording step. 17. The data conversion process further includes a recording step of recording the data in the super-distribution format, and a charging processing step of performing a charging process based on a charging condition of the attribute information. When controlling the charging process and outputting and recording a copy of the data in the super-distribution format read in the recording process to the external recording process, based on the charging condition of the attribute information, 17. The data conversion processing program storage medium according to claim 16, wherein the data conversion processing program charges the data in a format. 18. The data transmitting / receiving step includes: reading out data from a disk medium on which data including audio content is recorded; and reading the attribute information corresponding to the audio content from an external server via a digital network. Receiving the identification information of the disk medium from the disk medium, and transmitting the acquired identification information to the external server via the digital network. 18. The data conversion processing program storage medium according to claim 17, wherein the attribute information corresponding to the audio content recorded on the disk medium specified by the identification information is received from the server. 19. The attribute information obtaining step obtains identification information of the disk medium by a user's input operation.
19. The storage medium for storing a data conversion processing program according to claim 18. 20. The attribute information obtaining step of obtaining identification information of the disk medium by extracting information on the number of the audio contents recorded on the disk medium and respective reproduction times. A storage medium for a data conversion processing program according to the above description. 21. The network interface unit is connected to an external charging processing device via the digital network, and the charging processing step performs charging processing together with the external charging processing device based on the charging information.
19. The storage medium for storing a data conversion processing program according to claim 18.