JP2000228057A - System, device and method for dupricating data, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data duplicating system permitting to dupricate a data in high quality in the case that a copyright owner permits high quality duprication keeping copyrighting function. SOLUTION: A data duprication system 1 contains a data reduction control part 20 for controlling data correction according to correction control information 83. A data correction control part 20 decides whether or not charging is necessary for reproduction of data according to a charging control flag (83c3), and when the charging is necessary, the control part controls the correction of data according to duprication permission flag (83c1) and a quality control flag (83c2) after it has confirmed that the charging has been done by a charging device 200, and when the charging is unnecessary, the control part controls the correction of data without confirming that the charging has been done by the charging device 200 according to the reproduction permission flag (83c1) and a quality control flag (83c2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data duplication system, a data duplication device, a data duplication method, and a recording medium having a copyright protection function for duplicating digital data such as music data.

[0002]

2. Description of the Related Art Conventionally, high-quality video and audio have been recorded,
2. Description of the Related Art For reproduction, video and audio data are recorded as digital data on a recording medium using a dedicated device and are widely reproduced. Examples of a medium for recording digital data include a laser disk (LD), a compact disk (CD), a mini disk (MD), a digital versatile disk (DVD), and the like.

[0003] Such digital data recording media include:
Unlike analog data recording media such as (compact) cassette tapes and VHS tapes, the quality of recorded data is not easily deteriorated by duplication. In other words, digital data is easier to record and reproduce more accurately than analog data, and as long as the same data as the digital data held by the copy source recording medium is written to the copy destination recording medium, the data quality is not degraded. Does not occur.

Therefore, a user of a recording / reproducing apparatus for a digital data recording medium copies a commercially available recording medium with video and music data recorded thereon, thereby infringing the copyright of the rightful owner of the data. May be done. Therefore, a recording / reproducing apparatus for a digital data recording medium is provided with a function of restricting copying of the recording medium. For example, in the case of music data, the sound quality is degraded when copying from a CD to an MD, so that copying is restricted to protect copyright.

[0005]

If the above-mentioned sound quality deterioration is always performed when copying music data, high-quality copying can be performed even if the copyright holder of the music data permits the copying. A problem arises that it is not possible. For example, there may be a case where the copyright holder of music data wants to individually permit copying of music data depending on whether or not a fee has been paid by the user. There are also cases where the copyright holder of music data wants to uniformly permit free high-quality copying.

Further, it has been impossible with some conventional copying systems to set different fees depending on the sound quality level at which copying can be performed, and to select a sound quality level according to the user's preference. Therefore, there is a problem that the sound quality level of the copied music data does not match the user's preference.

[0007] Further, in order to solve the above-mentioned problem, in the case where duplication is made possible on condition of payment of a fee, it is necessary to prevent a pirate trader engaged in illegal duplication from duplicating without paying a fee. is there.

In view of the above problems, the present invention provides a data duplication system which has a copyright protection function and enables high quality data duplication when the copyright holder permits high quality duplication. , A data duplication device, a data duplication method, and a recording medium.

It is another object of the present invention to provide a data duplication system, a data duplication device, a data duplication method, and a recording medium which can select a quality level of data at a duplication destination according to a user's preference. I do.

Further, the present invention prevents illegal high-quality data copying when the copyright holder does not permit high-quality data copying while enabling high-quality data copying. Data replication system,
It is another object to provide a data duplication device, a data duplication method, and a recording medium.

[0011]

According to the present invention, there is provided a data duplication system for duplicating data recorded on a first recording medium onto a second recording medium, and charging for the duplication of the data. A data duplication system including a billing device, wherein the data duplication device responds to a data reading unit that reads the data from the first recording medium and correction control information for controlling correction of the data. ,
A data correction control unit that controls the correction of the data; and a data writing unit that writes an output of the data correction control unit to the second recording medium, wherein the correction control information permits the copying of the data. A copy permission flag indicating whether or not, a quality control flag for controlling the quality of the corrected data obtained by correcting the data, and a charging control flag for controlling charging for the data replication, The data correction control unit determines whether or not a charge is required for copying the data according to the charging control flag, and when the charge is required, the data correction control unit includes: After confirming that the charging has been performed by the charging device, controlling the modification of the data according to the copy permission flag and the quality control flag, If not required, the data correction control unit controls the correction of the data according to the copy permission flag and the quality control flag without confirming that the charging has been performed by the charging device, The above object is achieved.

[0012] The correction control information is recorded on the first recording medium, and the data readout unit stores the first control information in the first recording medium.
The correction control information may be read from the recording medium.

[0013] The modification control information may be encrypted.

[0014] The correction control information may be included in a predetermined frequency band of the data recorded on the first recording medium.

[0015] The modification control information may be input to the data modification control unit from outside the data duplication device.

[0016] The data correction control section may output correction data having a quality level corresponding to the correction control information.

[0017] A data copying device of the present invention is a data copying device for copying data recorded on a first recording medium to a second recording medium, and reads out the data from the first recording medium. A data correction control unit that controls the correction of the data in accordance with correction control information for controlling the correction of the data; and a data write unit that writes an output of the data correction control unit to the second recording medium. Unit, the correction control information, a copy permission flag indicating whether to permit the data copy, a quality control flag for controlling the quality of the correction data obtained by correcting the data, And a charging control flag for controlling charging for the copy of the data, wherein the data modification control unit performs the copying of the data in accordance with the charging control flag. Then, it is determined whether or not billing is required. If the billing is required, the data correction control unit performs the billing by a billing device provided outside the data duplication device. After confirming that
Controlling the correction of the data according to the duplication permission flag and the quality control flag, and when the charging is not required, the data correction control unit does not confirm that the charging has been performed by the charging device. The modification of the data is controlled in accordance with the duplication permission flag and the quality control flag, whereby the object is achieved.

The correction control information is recorded on the first recording medium, and the data reading section stores
The correction control information may be read from the recording medium.

[0019] The modification control information may be encrypted.

[0020] The correction control information may be included in a predetermined frequency band of the data recorded on the first recording medium.

[0021] The correction control information may be input to the data correction control unit from outside the data duplication device.

The data correction control section may output correction data having a quality level corresponding to the correction control information.

[0023] The data duplication method of the present invention is a data duplication method for duplicating data recorded on a first recording medium to a second recording medium, and (a) copying the data from the first recording medium. Reading the data; (b) controlling the correction of the data in accordance with correction control information for controlling the correction of the data; and (c) outputting the output of the data correction control unit to the second recording medium. The modification control information includes a duplication permission flag indicating whether or not duplication of the data is permitted, and a quality for controlling the quality of modified data obtained by modifying the data. A control flag for controlling charging for copying the data; and (b) performing (b-1) copying of the data in accordance with the charging control flag. After determining whether billing is required, when it is required (b-2) the charging is confirming that the billing has been against,
Controlling the modification of the data according to the copy permission flag and the quality control flag; and (b-3) when the charge is not required, without confirming that the charge has been performed, Controlling the modification of said data according to a flag and said quality control flag, thereby achieving said object.

The recording medium of the present invention is a computer-readable recording medium in which a program for causing a computer to execute data duplication processing for duplicating data recorded on a first recording medium onto a second recording medium is recorded. So,
The data duplication processing includes: (a) reading the data from the first recording medium; and (b) controlling modification of the data according to modification control information for controlling modification of the data. (C) writing the output of the data modification control unit to the second recording medium, wherein the modification control information includes a copy permission flag indicating whether or not the data is permitted to be copied; The step (b) includes a quality control flag for controlling quality of corrected data obtained by correcting the data, and a charging control flag for controlling charging for duplication of the data. -1) determining whether charging is required for copying the data according to the charging control flag; and (b-2) when charging is required, After confirming that the serial charge is, and controlling the modification of the data according to the copy permission flag and the quality control flag, (b-
And 3) controlling the modification of the data according to the copy permission flag and the quality control flag without confirming that the charging has been performed, if the charging is not required, The above object is achieved.

The recording medium according to the present invention is a recording medium on which data and modification control information for controlling modification of the data are recorded, wherein the modification control information permits the duplication of the data. A copy permission flag indicating whether the data is correct, a quality control flag for controlling the quality of corrected data obtained by correcting the data, and a charging control flag for controlling charging for copying the data. Thus, the above object is achieved.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A shows a configuration of a data replication system 1 according to an embodiment of the present invention.

The data copying system 1 includes a data copying apparatus 100 for copying data recorded on a recording medium 80 to a recording medium 90, and a charging apparatus 200 for charging for copying the data. The recording medium 80 is, for example, a DVD
-A read-only recording medium such as a ROM. The recording medium 90 is a readable / writable medium such as a DVD-RAM, for example.

The data copying device 100 includes a data reading unit 10 for reading data recorded on the recording medium 80,
It includes a data correction control unit 20 for controlling the correction of the read data, and a data writing unit 30 for writing the output of the data correction control unit 20 to the recording medium 90.

The function of each unit included in data copying apparatus 100 may be realized by hardware (for example, a circuit) or by software (for example, a program). Alternatively, those functions may be realized by a combination of hardware and software.

Here, in this specification, "data modification" refers to all processing performed on data for the purpose of copyright protection. Typically, "correcting data"
To degrade (degrade) the quality of data for the purpose of copyright protection. For example, deteriorating the sound quality of music data and deteriorating the image quality of video data are included in “data correction”. Further, "controlling data modification" includes not only how data is modified but also control not modifying data.

In the following description, it is assumed that the data recorded on the recording medium 80 is music data. However, data recorded on the recording medium 80 is not limited to music data. The present invention is applicable to the case where any type of data recorded on the recording medium 80 is duplicated.
For example, the data recorded on the recording medium 80 may be video data.

In the example shown in FIG. 1A, the data to be copied is recorded on the recording medium 80 as encrypted data 81. The recording medium 80 has encrypted data 81,
A decryption key 82 and modification control information 83 are recorded.
The encrypted data 81 has been encrypted by the first encryption method. The decryption key 82 is a decryption key of the first encryption method. The encrypted data 81 is decrypted using the decryption key 82. The modification control information 83 is information for controlling modification of data to be copied. Details of the modification control information 83 will be described later with reference to FIG. Encrypted data 8
1, any format can be used as a format for recording the decryption key 82 and the modification control information 83 on the recording medium 80.

The correction control information 83 does not necessarily need to be recorded on the recording medium 80. The modification control information 83 may be input to the data modification control unit 20 from outside the data duplication device 100.

In the example shown in FIG. 1A, the data copied by the data copying device 100 is the encrypted data 91.
Is written to the recording medium 90. Encrypted data 91
Represents the data output from the data correction control unit 20 as a second
By encrypting according to the encryption method of The second encryption method uses the I
It is determined based on the D information 92. The second encryption method may be the same as or different from the first encryption method. The ID information 92 is information unique to the recording medium 90 used to identify the recording medium 90.
The ID information 92 is recorded at a predetermined position on the recording medium 90 in the manufacturing process of the recording medium 90. Encrypted data 9
1. Any format can be used as a format for recording the ID information 92 on the recording medium 90.

The data to be copied recorded on the recording medium 80 does not necessarily have to be encrypted. For example, data 8 encrypted using the decryption key 82
1 may be recorded on the recording medium 80 as data equivalent to the data obtained by decoding 1. In this case, the data read from the recording medium 80 is
2 does not need to be decoded. Therefore, the recording medium 8
The data read from 0 is not decrypted,
The data is output to the data correction control unit 20.

The data written on the recording medium 90 does not necessarily have to be encrypted. The data output from the data modification control unit 20 may be written to the recording medium 90 without being encrypted.

FIG. 2 shows an example of the data structure of the recording medium 80. The recording medium 80 has a layer structure such as a physical layer and a file layer.

The recording medium 80 has a lead-in (Lead-
in) area, volume area, and lead-out (Le
ad-out) region. The lead-in area is arranged on the inner peripheral side of the recording medium 80. The lead-out area is arranged on the outer peripheral side of the recording medium 80. The decryption key 82 shown in FIG. 1A can be recorded in, for example, a lead-in area.

The volume area includes a volume management area and a file area.

In the file area, a management file and N audio title files # 1 to #N are recorded. Here, N is, for example, 1 ≦ N ≦ 9.
It is an integer satisfying 9. What is a management file?
This file manages menu images and table of contents information displayed to the user. An audio title file is a file containing management information and one or more pieces of music data.

As shown in FIG. 2, the audio title file # 1 includes management information and M pieces of music data # 1 to # 1.
#M. Here, M is an integer satisfying, for example, 1 ≦ M ≦ 99. Each of the music data # 1 to #M corresponds to the encrypted data 81 shown in FIG. 1A.

The management information includes correction control information 83, reproduction path information, and attribute information of music data # 1 to #M. The reproduction path information includes addresses of music data # 1 to #M.
The attribute information of the music data # 1 to #M includes information indicating the number of channels, quantization rate, sampling rate, and the like of the corresponding music data.

In the example shown in FIG.
Is included in the management information. However, the modification control information 8
The position where 3 is recorded on the recording medium 80 is not limited to this. The modification control information 83 can be recorded at an arbitrary position on the recording medium 80.

FIG. 3 shows an example of the data structure of the modification control information 83. In the following description, the modification control information 83
Is included in the management information of the audio title file # 1 (FIG. 2), and it is assumed that the audio title file # 1 contains M pieces of music data # 1 to #M.

The modification control information 83 is stored in the ISRC (Inte
rational Standard Record
ing Code) 83a, the number of songs 83b, and flag sets 83c respectively corresponding to song data # 1 to #M.

The ISRC 83a is ID information for identifying a music title (audio title file), and is designed to have a unique value in the whole world. The ISRC 83a includes, for example, a country code (two ASCII characters), an owner code (three A
This is a 24-bit code composed of an ASCII character, a recording year (two-digit number), and a serial number (five-digit number).

The number of music pieces 83b indicates the number of music data recorded in the audio title file. The number of songs 83b is, for example, 24-bit data. In the example shown in FIG. 3, the value of the number of songs 83b is M.

The flag set 83c includes music data # 1 to #
M is defined for each. Flag set 8
3c includes a copying permission flag 83c ₁ indicating whether or not to permit the replication of the music data, and the quality control flag 83c ₂ for controlling the quality of the music data that has been modified is obtained by modifying the music data, and a charging control flag 83c ₃ for controlling charging for replication of the music data.

Copy permission flag 83c₁, Quality control flag
83c_TwoAnd charging control flag 83c _ThreeEach is 1
Bit data.

The copying permission flag 83c ₁ having a value "0" indicates not to permit to replicate music data under any conditions, the value "1" copying permission flag 83c ₁ is song under certain conditions Indicates that data is allowed to be duplicated. The particular condition is defined by the quality control flag 83c ₂ and the value of the billing control flag 83c ₃ values.

Quality control flag 83c_TwoValue of "0"
Under the condition that the data quality deteriorates, the song data
This indicates that copying is permitted, and the quality control flag 8
3c _TwoValue of "1" degrades the quality of song data
Permission to copy the song data without
You.

[0053] The value "0" of the billing control flag 83c ₃ without charge for replication of the music data (i.e., free) indicates that permission to duplicate the music data, billing control flag 83c The value “1” of ₃ indicates that copying of the music data is permitted on condition that charging is performed for the copying of the music data.

[0054] Table 1, the copying permission flag 83c ₁ value, the quality control flag 83c ₂ and the value of the billing control flag 83c ₃
Shows the correspondence between the combination of the values and the conditions for permitting the copying of the music data.

[0055]

[Table 1]

In case 1 of Table 1, the copy permission flag 83
The value of c ₁ is "0". Therefore, the quality control flag 83
regardless of the value and the value of the billing control flag 83c ₃ for c _2, it is not allowed to replicate music data.

In case 2 of Table 1, it is permitted to copy the music data free of charge, provided that the quality of the music data is degraded.

In case 3 of Table 1, the copying of the music data is permitted on condition that the quality of the music data is degraded and that the copying of the music data is charged.

In case 4 of Table 1, it is permitted to copy the music data free of charge without deteriorating the quality of the music data.

In case 5 of Table 1, it is permitted to copy the music data without deteriorating the quality of the music data, on the condition that a fee is charged for copying the music data.

[0061] Thus, the copying permission flag 83c ₁ value by combining the values of and billing control flag 83c ₃ for quality control flag 83c _2, it is possible to realize a variation of the duplication permission condition of the music data.

[0062] data modification control section 20 (FIG. 1A) determines whether the charge for replication of the music data is needed according to the charging control flag 83c _3. If billing is required, the data correction control unit 20
(FIG. 1A)
Copying permission flag 83c ₁ and the modified music data according to the quality control flag 83c ₂ (i.e., whether or not to degrade the quality of the music data, whether to what extent degraded if degrade the quality of the music data) for controlling. If billing is not required, the data modification control unit 20
Without confirming that the billing has been by 0, modification of the music data in accordance with the copying permission flag 83c ₁ and the quality control flag 83c ₂ (i.e., whether or not to degrade the quality of the music data, degrading the quality of the music data If so, how much is deteriorated) is controlled.

Hereinafter, with reference to FIG. 1A again, a detailed configuration of each unit included in the data copying apparatus 100 will be described.

The data read section 10 includes a data read circuit 11, a decryption key detection circuit 12, a modified control information detection circuit 13, and a decryption circuit 14.

The data reading circuit 11 includes a recording medium 80
And outputs the encrypted data 81 to the decryption circuit 14. The decryption key detection circuit 12 detects the decryption key 82 from the recording medium 80 and outputs the detected decryption key 82 to the decryption circuit 14. The correction control information detection circuit 13 detects the correction control information 83 from the recording medium 80 and outputs the detected correction control information 83 to the data correction control unit 20.

The decryption circuit 14 decrypts the encrypted data 81 read by the data read circuit 11 based on the decryption key 82 detected by the decryption key detection circuit 12. The decryption circuit 14 outputs data obtained by decrypting the encrypted data 81 (hereinafter, referred to as “decrypted data”) to the data correction control unit 20. The decrypted data corresponds to music data that has not been encrypted.

The data correction control unit 20 includes a correction control circuit 2
1 and a data correction circuit 22.

The modification control information 83 detected by the modification control information detection circuit 13 is input to the modification control circuit 21.

[0069] modification control circuit 21 decodes the data according to the charging control flag 83c ₃ included in the modification control information 83 (for example, music data) to determine whether a charge for replication is needed.

If charging is required, the modification control circuit 21 communicates with the charging device 200 according to a predetermined protocol, and after confirming that the charging device 200 has been charged, the copy permission flag 83c _1. and generating a control signal 23 according to the quality control flag 83c _2. Confirmation of the billing by the billing device 200 is performed, for example, by the correction control circuit 21 receiving information indicating the completion of the billing from the billing device 200. Such information can be received, for example, via the Internet.

For example, when the user of the data copying apparatus 100 has paid the copyright holder of the recording medium 80 a fee for copying the data recorded on the recording medium 80, the charging apparatus 200 sends the correction control circuit 21 Information indicating the completion of charging is transmitted.

[0072] When the billing is not required, the correction control circuit 21, without communicating with the billing apparatus 200, generates a control signal 23 in accordance with the copying permission flag 83c ₁ and the quality control flag 83c _2.

The data correction circuit 22 corrects the decoded data (for example, music data) (that is, determines whether or not to deteriorate the quality of the decoded data, or deteriorates the quality of the decoded data) in accordance with the control signal 23. If so, how much is deteriorated) is controlled.

The output of the data correction circuit 22 is output to the data writing section 30.

The data writing section 30 includes an encryption circuit 31
And a data write circuit 32 and an ID detection circuit 33.

The encryption circuit 31 encrypts the output of the data correction circuit 22 according to the second encryption method. The ID detection circuit 33 stores the ID information 9 recorded on the recording medium 90.
2 is detected. The second encryption method uses an ID detection circuit 33.
Is determined based on the ID information 92 detected by.

The data writing circuit 32 includes the encryption circuit 3
1 is written to the recording medium 90 as encrypted data 91.

Thus, the encrypted data 81 recorded on the recording medium 80 is copied to the recording medium 90.

FIG. 1B shows a configuration example of the modification control circuit 21. The correction control circuit 21 includes a data selection circuit 21a for selecting data to be duplicated from the plurality of data.
A quality level selection circuit 21b for selecting the quality level of the data of the copy destination; a charge calculation circuit 21c for calculating the charge required for copying the data; a data selection circuit 21a, a quality level selection circuit 21b; And a control circuit 21d for controlling the charge calculation circuit 21c.

The control circuit 21d receives the correction control information 83, and controls the data selection circuit 21a to create a data selection screen based on the correction control information 83.

The data selection circuit 21a creates a data selection screen and displays the data selection screen on the input / output device 300.

FIG. 4A shows an example of the data selection screen. In the example shown in FIG. 4A, in addition to a message prompting the user to select a song to be duplicated, a “song number”,
"Song title", "Reproduction permission", "High-quality reproduction permission",
"Necessity of charging for copying" is displayed. In the example shown in FIG. 4A, it is assumed that music data # 1 to # 4 are recorded on the recording medium 80.

"Song number" on the data selection screen indicates the index number of song data # 1 to # 4. "Song title" on the data selection screen indicates the title of the song data # 1 to # 4.

"Permission of duplication" on the data selection screen
Is a copy permission flag 83c included in the modification control information 83.
Corresponds to ₁ . That is, "Replication permission" when the value of the copying permission flag 83c ₁ is "0" is displayed as "No",
"Replication of permission" when the value of the copying permission flag 83c ₁ is "1" is displayed as "Yes".

The “permission of high-quality duplication” on the data selection screen indicates whether the quality control flag 8
Corresponding to 3c _2. That is, when the value of the quality control flag 83c ₂ is "0", "permission of high quality replication" is displayed as "No", the value of the quality control flag 83c ₂ is "1", "high-quality replication when the “Permission” is displayed as “Yes”.

The “whether a charge is required for copying” on the data selection screen corresponds to the charge control flag 83 c ₃ included in the modification control information 83. In other words, "whether or not it is necessary for billing for replication" in the case of the value of the billing control flag 83c ₃ is "0" is displayed as "No", "replication when the value of the billing control flag 83c ₃ is" 1 ""Necessity of charging for?" Is displayed as "Yes".

In the following description, the user sets “song0
Assume that "1" and "song02" have been selected as songs to be duplicated. Such a selection is made, for example, by the user operating the input / output device 300 (for example, a keyboard or a mouse).

"Song0" selected by the user
For both “1” and “song02”, “whether or not charging is required for copying” is “Yes”. Therefore, before copying these data, it must be confirmed that the charging device 200 has charged for the copy.

The data selection circuit 21a stores data relating to “song01” selected by the user and “son01”.
g02 ”to the charging device 200. The billing device 200 responds to the data,
The data of the fee of the different quality level of “song01” and the data of the fee of the different quality level of “song02” are returned to the quality level selection circuit 21b.

The quality level selection circuit 21 b
00, a quality level selection screen is created based on the data returned from the input / output device 30.
Display at 0.

FIG. 4B shows an example of the quality level selection screen. In the example shown in FIG. 4B, in addition to a message prompting the user to select a quality level for each song to be copied, “song number”, “song name”, and “quality level 1 (2c
h, 20 bits, 48 kHz), “quality level 2 (6 ch, 20 bits, 48 kHz)”, and “quality level 3 (6 ch, 24 bits, 192 kHz)”. In the example shown in FIG. 4B, “song01”, “son
g02 ”is a quality level 3 (6 ch, 24
bit, 192 kHz).

The “quality level 1 (2 ch, 20 bits, 48 kHz) fee” on the quality level selection screen should be paid by the user when copying music data recorded on the recording medium 80 to music data of quality level 1. Indicates the fee.

The “quality level 2 (6 ch, 20 bits, 48 kHz) fee” on the quality level selection screen should be paid by the user when copying music data recorded on the recording medium 80 to music data of quality level 2. Indicates the fee.

The “quality level 3 (6 ch, 24 bit, 192 kHz) fee” on the quality level selection screen is
The music data recorded on the recording medium 80 is transferred to the quality level 3
Indicates the fee to be paid by the user when copying to the music data of.

Therefore, when the user selects the quality level 3, the music data recorded on the recording medium 80 is copied without deteriorating the quality of the music data. When the user selects the quality level 1 or the quality level 2, the quality of the music data recorded on the recording medium 80 is degraded and the music data is copied.

In the following description, the user sets “song0
Select quality level 3 for "1" and "song02"
Assume that quality level 2 has been selected for. Such a selection is made, for example, by the user operating the input / output device 300 (for example, a keyboard or a mouse).

The quality level selection circuit 21b outputs “song
01 ”and“ song0 ”.
"2" and data relating to quality level 2
Send to In response to the data, the charging device 200 returns to the fee calculation circuit 21c the data relating to the quality level 3 fee of "song01" and the data relating to the quality level 2 fee of "song02".

The charge calculation circuit 21c creates a charge confirmation screen based on the data returned from the charging device 200,
The charge confirmation screen is displayed on the input / output device 300.

FIG. 4C shows an example of the fee confirmation screen. FIG.
In the example shown in C, the selected “song01”,
The total charge (135 yen) for copying the song data of “song02” to the song data of the selected quality level,
A message prompting the user to enter "Yes" or "No" to indicate whether to approve this fee is displayed.

In order to indicate that the user approves the charge, "Y
es ”(ie, if the user approves to charge for data replication), the charging device 200
Executes a billing process. For example, the billing device 200
Debit the account from the user's bank account. The billing device 200 is a remote server that can be connected to the data copying device 100 via the Internet or a telephone line, for example.

Charging device 200 identifies whether or not the person who has approved the charging is a registered user, based on the password registered by the user at the time of user registration. The billing device 200 may be a card slot into which a prepaid card or an IC card is inserted.

When the charging by the charging device 200 is completed,
Billing device 200 transmits a signal notifying that billing has been completed to fee calculation circuit 21c. The control circuit 21d outputs the control signal 23 in response to the charge calculation circuit 21c receiving the signal notifying that the charging is completed.

FIG. 1C shows a configuration example of the data correction circuit 22. The data correction circuit 22 includes a circuit 22a that degrades data of quality level 3 into data of quality level 1, a circuit 22b that degrades data of quality level 3 into data of quality level 2, and a circuit 22b that degrades data of quality level 3 And a switch 22d for selectively inputting the output of the decoding circuit 14 to one of the circuits 22a to 22c in accordance with the control signal 23.

The circuit 22a includes a mixdown circuit 22a
_1, and a down-sampling circuit 22a _2.

[0105] mixdown circuit 22a ₁ performs the mix down process to reduce the sound of 6 channels to two channels. The mixdown process does not simply cut off the remaining four channels of audio, but synthesizes the channels according to certain fixed parameters.

[0106] downsampling circuit 22a ₂ is to reduce the number of sampling bits to 20 bits from 24 bits, 48kHz sampling frequency from 192kHz
Downsampling processing is performed. The downsampling process is performed based on a normal acoustic theory.

The circuit 22b includes the downsampling circuit 2
2b ₁ Downsampling processing performed by the down-sampling circuit 22b ₁ is the same as the downsampling processing performed by the down-sampling circuit 22a _2.

The switch 22d is controlled based on the control signal 23.

When "quality level 1" is selected by the user, the switch 22d is controlled so that the output of the decoding circuit 14 is input to the circuit 22a. In this case, the data quality is degraded from the quality level 3 to the quality level 1 by the circuit 22a.

When "quality level 2" is selected by the user, the switch 22d is controlled so that the output of the decoding circuit 14 is input to the circuit 22b. In this case, the data quality is degraded from the quality level 3 to the quality level 2 by the circuit 22b.

When "quality level 3" is selected by the user, the switch 22d is controlled so that the output of the decoding circuit 14 is input to the circuit 22c. In this case, the data passes through circuit 22c. As a result, the data quality is maintained at the quality level 3 without deterioration.

Note that in the examples shown in FIGS. 1A to 1C,
Each unit included in the data duplication device 100 is realized by hardware (circuit). However, it is also possible to realize the function of each unit included in the data duplication device 100 by software.

FIG. 5A is a flowchart showing the flow of the data copying process. By causing a computer to execute the data duplication processing shown in FIG. 5A, a function equivalent to the function of each unit of the data duplication apparatus 100 shown in FIG. 1A can be realized.

FIG. 5B shows a configuration of a computer 500 that executes the data copying process shown in FIG. 5A.

The computer 500 includes a CPU 501,
It includes a memory 502, a communication interface 503, an input / output interface 504, and a bus 505. CPU
The memory 501, the memory 502, the communication interface 503, and the input / output interface 504 are mutually connected by a bus 505. The communication interface 503 is connected to the charging device 20 via a network such as the Internet.
0 (FIG. 1A). The input / output interface 504 is connected to the input / output device 300 (FIG. 1).
It is configured to be connectable to A).

A program expressing the data duplication processing shown in FIG. 5A (hereinafter referred to as a data duplication processing program) is stored in the memory 502, for example. Alternatively, the data duplication processing program may be recorded on an arbitrary type of recording medium such as a floppy disk, CD-ROM, DVD-ROM, or the like. The data duplication processing program recorded on such a recording medium is the input / output device 300
(Eg, a disk drive) via the computer 5
00 is loaded into the memory 502. When the CPU 501 executes the data duplication processing program, the computer 500 functions as the data duplication device 100 (FIG. 1A).

Hereinafter, each step of the data duplication processing will be described in detail with reference to FIG. 5A. Each step is CPU
501 (FIG. 5B).

Step S101: The CPU 501 reads the encrypted data 81 from the recording medium 80.

Step S102: The CPU 501 detects the decryption key 82 from the recording medium 80.

Step S103: The CPU 501 generates decrypted data by decrypting the encrypted data 81 using the decryption key.

Step S104: The CPU 501 detects the modification control information 83 from the recording medium 80.

[0122] Step S105: CPU 501, in accordance with the billing control flag 83c ₃ included in the modification control information 83, determines whether billing is required for replication of the decoded data. If charging is required, the process proceeds to step S106. If charging is not required, the process proceeds to step S107.

Step S106: The CPU 501 confirms that charging by the charging device 200 has been completed.

[0124] Step S107: CPU 501, in accordance with the copying permission flag 83c ₁ and the quality control flag 83c ₂ included in the modification control information 83, the correction of the decoded data (i.e., whether or not to degrade the quality of the decoded data ,
The quality of the decoded data, if any, is controlled).

Step S108: The CPU 501 detects the ID information 92 from the recording medium 90.

Step S109: The CPU 501 sets the ID
The decrypted data is encrypted using the encryption key determined based on the information 92.

Step S 110: The CPU 501 records the encrypted data 91 on the recording medium 90.

FIG. 6 shows a procedure of a communication process between the data copying apparatus 100 and the charging apparatus 200.

[0129] In the second column of FIG. 6, the black circles indicate the entities that execute processing among the data copying apparatus 100 and the charging apparatus 200. Also, the arrow indicates the data duplication device 10
0 and the direction in which data is transmitted between the charging devices 200.

[0130] The third column of FIG. 6 shows the name of a function for executing a communication process between the data copying apparatus 100 and the charging apparatus 200.

Step S601: Using the data selection screen shown in FIG. 4A, the user selects one of the music pieces recorded on the recording medium 80 to be copied to the recording medium 90.
Select the above songs.

[0132] Step S602: Among the songs selected by the user, when the value of the copying permission flag 83c ₁ is "1" and the value of the billing control flag 83c ₃ is songs of "1", data replication device 100 transmits a connection confirmation signal for confirming the connection of charging apparatus 200 to charging apparatus 200 (Search_Server ()).

Step S603: When the charging device 200 receives the connection confirmation signal, it transmits the ID of the charging device 200 to the data copying device 100 to indicate that the charging device 200 is active (Reply_Server).
()). The ID of the charging device 200 is identification information unique to the charging device 200.

Step S604: Data duplication device 100
Confirms whether the received ID is the ID of the charging device 200 or not. The received ID is the ID of the charging device 200
If so, the data copying apparatus 100 starts the accounting process.

Step S605: Data duplication device 100
Transmits the data A to the charging device 200 (Send
(Data_A)).

FIG. 7A shows an example of the format of data A.

Data A indicates a list of songs (song numbers # 1 to #L) that are permitted to be copied on condition that charging is performed, among songs selected by the user. Where L
Is an integer satisfying 1 ≦ L ≦ M. The “user ID” included in the data A is a user number unique to the user.
“ISRC” included in the data A is the ISRC 83a included in the correction control information 83 detected from the recording medium 80.
Has the same content as "ISRC" for data A
Is only included. This is because the example shown in FIG. 7A is an example in which data can be copied only in audio title file units. The “number of songs” included in the data A is one of the songs selected by the user.
Shows the number L of songs permitted to be copied on condition that charging is performed.

FIG. 8A shows a specific example of data A. FIG.
The example shown in A indicates that the song of song number # 1 and the song of song number # 2 are selected as songs permitted to be copied on condition that charging is performed. The user ID is "HQC
001 ", and ISRC is" JPABC981234 ".
5 ", and the number of songs is two.

Step S606: Billing apparatus 200 verifies the user ID included in received data A.

Step S607: If the billing device 200 confirms that the user ID is valid, it transmits data B to the data copying device 100 (Send (Da
ta_B)).

FIG. 7B shows an example of the format of data B.

Data B is a list indicating the copy fee of quality level 1 to quality level 3 for each of the music numbers # 1 to #L specified by data A.

FIG. 8B shows a specific example of data B. FIG.
In the example shown in B, the copy fee for the quality level 1 of the song number # 1 is 20 yen, the copy fee for the quality level 2 of the song number # 1 is 50 yen, and the copy fee for the quality level 3 of the song number # 1 is 100
It is a circle. The duplication fee for quality level 1 for song number # 2 is 15 yen, the duplication fee for quality level 2 for song number # 2 is 35 yen, and the duplication fee for quality level 3 for song number # 3 is 70 yen.
It is a circle.

Step S608: The user selects a quality level for each of the music numbers # 1 to #L specified by the data A using the quality level selection screen shown in FIG. 4B. The quality level is expressed by, for example, the number of channels, a quantization rate, and a sampling rate.

Step S609: Data replication device 100
Transmits data C indicating the quality level selected by the user to charging apparatus 200 (Send (Data_
C)).

FIG. 7C shows an example of the format of data C.

The data C is a list indicating the quality level selected by the user for each of the music numbers # 1 to #L specified by the data A. Data C
, The quality level value “1” indicates that given data is copied to quality level 1 data, and the quality level value “2” indicates that given data is copied to quality level 2 data. The value “3” of the quality level indicates that the given data is copied to the data of the quality level 3.

FIG. 8C shows a specific example of data C. FIG.
In the example shown in FIG. C, the quality level 3
Has been selected, and quality level 2 has been selected for song number # 2.

Step S610: Billing apparatus 200 receives data C and creates data D based on data C.

Step S611: The billing device 200 transmits the data D to the data duplication device 100 (Send
(Data_D)).

FIG. 7D shows an example of the format of the data D.

The data D is a list indicating the final copy fee for each of the music numbers # 1 to #L specified by the data A. The “application ID” included in the data D is an ID assigned by the charging device 200 when copying data.

FIG. 8D shows a specific example of data D. FIG.
In the example shown in D, the application ID is “A001”. The copy fee for song number # 1 at quality level 3 is 100 yen, and the copy fee for song number # 2 at quality level 2 is 35 yen.

Step S612: The user checks the total fee for copying the selected song data to song data of the selected quality level using the fee confirmation screen shown in FIG. 4C. The user may be required to add the total (eg,
In the example shown in FIG. 4C, when approving (135 yen), the password registered in the server at the time of user registration is input to the data copying apparatus 100.

Step S613: Data replication device 100
Creates data E based on the password input by the user, and transmits data E to charging apparatus 200 (Send (Data_E)).

FIG. 7E shows an example of the format of the data E.

Data E is data indicating whether or not the correct user has finally approved the charge. The “password” included in the data E becomes “0” when the user cancels the charging, and becomes the password of the user when the user approves the charging.

FIG. 8E shows a specific example of data E. FIG.
The example shown in E is an example where the user has approved the billing. The data E includes the password “2611” of the user.

Step S614: The charging device 200 receives the data E and verifies the password contained in the received data E.

Step S615: If the password is correct, the charging apparatus 200 transmits the data F to the data duplication apparatus 100 (Send (Data_F)), and debits the charging from the user's account.

FIG. 7F shows an example of the format of the data F.

"Charging completion flag" included in data F
Indicates whether or not charging by the charging device 200 has been completed. A value “0” of the “charging completion flag” indicates that charging by the charging device 200 has not been completed, and a value “1” of the “charging completion flag” indicates that charging by the charging device 200 has been completed.

FIG. 8F shows a specific example of data F. FIG.
The example shown in F indicates that charging corresponding to the user ID “HQC001” and the application ID “A001” has been completed.

Step S616: Data copy device 100
Duplicates the selected song at the selected quality level.

Although the data on the recording medium 80 and the recording medium 90 is assumed to be encrypted in the above-described embodiment, the principle of the present invention is that the data on the recording medium 80 and the recording medium 90 are encrypted. It can be applied even when it is not.

The decryption key 82 may be encrypted by an encryption method different from that of the encrypted data 81. In this case, the data copying apparatus 100 only needs to have a circuit (or step) for decrypting the decryption key 82 and a decryption key for decrypting the decryption key 82. The decryption key for decrypting the decryption key 82 is different from the decryption key 82 for decrypting the encrypted data 81.

In the above-described embodiment, at least one of the copy permission flag 83c ₁ , the quality control flag 83c ₂ and the charge control flag 83c ₂ may be included in the encrypted data 81.

In order to prevent the modification control information 83 from being illegally copied, the modification control information 83 may be encrypted.

Furthermore, the modification control information 83 may be included in the encrypted data 81 as a watermark (digital watermark).

The watermark is a technique for embedding specific data in original data. The watermark is
It has the following features (1) and (2).

(1) By embedding specific data in the original data, the quality of the original data hardly deteriorates.

(2) Even if the original data is slightly processed, specific data embedded in the original data can be detected.

For example, using the watermark technique,
At the position corresponding to the frequency f of the audio data.
Information with a value of "0" or "1" can be embedded
You. For example, audio data at frequency f (Hz)
Data gain is a predetermined threshold T _H(DB) is exceeded
In this case, the information having the value "1" is
Embedded at the frequency f (Hz)
The gain of the radio data is a predetermined threshold T_HOver (dB)
If not, the information with the value "0" is
Embedded in audio data.

Note that the frequency f and the predetermined threshold value _TH are kept secret. This makes it extremely difficult for a third party to illegally obtain information embedded in the audio data. Furthermore, since the watermark is embedded in the audio data waveform itself, it is difficult to delete the watermark no matter how the audio data is processed, unless the quality of the audio data is significantly degraded.

To detect a watermark embedded in audio data, for example, a high-pass filter that cuts low-frequency components of a signal and a low-pass filter that cuts high-frequency components of a signal are used. That is, a component of the audio data having a frequency lower than f is cut using the high-pass filter, and a component of the audio data exceeding the frequency f is cut using the low-pass filter. As a result, the component of the frequency f of the audio data is extracted. The gain of this component is set to a predetermined threshold T
By comparing with _H , information embedded in the audio data is detected.

[0176] Using the technique of the watermark mentioned above, can be embedded copying permission flag 83c ₁ for music data #i in a position corresponding to the frequency f _i1 of the music data #i, the frequency of the music data #i f a position corresponding to _i2 can embed quality control flag 83c ₂ for the music data #i, billing control flag 83c ₃ for song data #i in a position corresponding to the frequency f _i3 music data #i Can be embedded. Here, i is any integer satisfying 1 ≦ i ≦ M. The frequencies f _i1 , f _i2 , and f _i3 are preferably included in a frequency band that does not substantially affect the reproduction of the music data i (for example, a frequency band other than the human audible sound range). Further, in order to avoid erroneous detection, it is preferable that the frequencies f _i1 , f _i2 , f _i3 are separated from each other.
Note that the thresholds corresponding to each of the frequencies f _i1 , f _i2 , and f _i3 may be the same or different.

Further, in the above-described embodiment, the billing information indicating that billing by the billing device 200 has been input from outside the data copying device 100, but such billing information is stored in the recording medium 80. May be recorded. Further, such billing information may be encrypted like the modification control information 83.

[0178]

As described above, according to the data duplication system of the present invention, the modification of the data read from the recording medium is controlled according to the modification control information. Correction control information is
A copy permission flag, a quality control flag, and a charging control flag are included. By combining these flags, it is possible to realize a variation of the condition for permitting data duplication. For example, if the copyright holder permits, it is possible to copy the data on a free or charged condition without deteriorating the quality of the data.

Further, by controlling data correction in accordance with the correction control information, it is possible to provide data of different quality levels as copy destination data. This makes it possible to select the quality level of the copy destination data according to the user's preference.

Further, by encrypting the modification control information or embedding the modification control information in a predetermined frequency band of the data recorded on the recording medium, illegal copy contrary to the intention of the copyright holder can be prevented. This can be prevented.

[Brief description of the drawings]

FIG. 1A is a data replication system 1 according to an embodiment of the present invention.
FIG. 3 is a block diagram showing the configuration of FIG.

FIG. 1B is a block diagram showing a configuration of a correction control circuit 21 shown in FIG. 1A.

FIG. 1C is a block diagram showing a configuration of a data correction circuit 22 shown in FIG. 1A.

FIG. 2 is a diagram showing an example of a data structure of a recording medium 80.

FIG. 3 is a diagram showing an example of a data structure of modification control information 83.

FIG. 4A is a diagram showing an example of a data selection screen.

FIG. 4B is a diagram showing an example of a quality level selection screen.

FIG. 4C is a diagram showing an example of a fee confirmation screen.

FIG. 5A is a flowchart showing the flow of a data copy process.

FIG. 5B is a block diagram showing a configuration of a computer 500 that executes the data copying process shown in FIG. 5A.

FIG. 6 is a protocol chart showing a procedure of a communication process between the data copying apparatus 100 and the charging apparatus 200.

7A is a diagram showing an example of a format of data A communicated between the data duplication device 100 and the billing device 200. FIG.

FIG. 7B is a diagram showing an example of a format of data B communicated between the data duplication device 100 and the billing device 200.

FIG. 7C is a diagram showing an example of a format of data C communicated between the data duplication device 100 and the billing device 200.

FIG. 7D is a diagram showing an example of a format of data D communicated between the data duplication device 100 and the charging device 200.

FIG. 7E is a diagram showing an example of a format of data E communicated between the data duplication device 100 and the billing device 200.

FIG. 7F is a diagram showing an example of a format of data F communicated between the data duplication device 100 and the billing device 200.

8A is a diagram showing a specific example of data A communicated between the data duplication device 100 and the billing device 200. FIG.

FIG. 8B is a diagram showing a specific example of data B communicated between the data duplication device 100 and the billing device 200.

8C is a diagram showing a specific example of data C communicated between the data duplication device 100 and the billing device 200. FIG.

FIG. 8D is a diagram showing a specific example of data D communicated between the data duplication device 100 and the billing device 200.

8E is a diagram showing a specific example of data E communicated between the data duplication device 100 and the charging device 200. FIG.

FIG. 8F is a diagram showing a specific example of data F communicated between the data duplication device 100 and the billing device 200.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 data replication system 10 data readout unit 11 data readout circuit 12 decryption key detection circuit 13 modification control information detection circuit 14 decryption circuit 20 data modification control unit 21 modification control circuit 22 data modification circuit 30 data writing unit 31 encryption circuit 32 data Writing circuit 33 ID detection circuit 80 Recording medium 81, 91 Encrypted data 82 Decryption key 83 Modification control information 90 Recording medium 92 ID information 100 Data duplication device 200 Billing device 300 Input / output device

Claims (15)

[Claims] 1. A data duplication system comprising: a data duplication device for duplicating data recorded on a first recording medium onto a second recording medium; and a charging device for charging for duplication of the data. A data read unit that reads the data from the first recording medium; and a data correction control unit that controls the correction of the data in accordance with correction control information for controlling the correction of the data. And a data writing unit that writes an output of the data correction control unit to the second recording medium, wherein the correction control information includes a copy permission flag indicating whether to permit the data to be copied, A quality control flag for controlling the quality of the corrected data obtained by correcting the data, and a charging control flag for controlling charging for the copy of the data. The data modification control unit determines whether or not a charge is required for copying the data according to the charge control flag; and if the charge is required, the data modification control unit After confirming that the billing device has performed the billing, controlling the data modification according to the copy permission flag and the quality control flag. If the billing is not required, the data modification control unit A data duplication system that controls modification of the data according to the duplication permission flag and the quality control flag without confirming that the charging has been performed by the charging device. 2. The data according to claim 1, wherein the correction control information is recorded on the first recording medium, and wherein the data reading unit reads the correction control information from the first recording medium. Replication system. 3. The data replication system according to claim 2, wherein said modification control information is encrypted. 4. The data duplication system according to claim 2, wherein the correction control information is included in a predetermined frequency band of the data recorded on the first recording medium. 5. The data replication system according to claim 1, wherein the modification control information is input to the data modification control unit from outside the data replication device. 6. The data duplication system according to claim 1, wherein the data correction control unit outputs correction data having a quality level according to the correction control information. 7. A data copying device for copying data recorded on a first recording medium to a second recording medium, comprising: a data reading unit that reads the data from the first recording medium; A data correction control unit that controls the correction of the data according to correction control information for controlling the correction; and a data writing unit that writes an output of the data correction control unit to the second recording medium. The modification control information includes a duplication permission flag indicating whether to permit duplication of the data, a quality control flag for controlling the quality of modified data obtained by modifying the data, and a A charging control flag for controlling charging, wherein the data modification control unit is required to charge for copying of the data according to the charging control flag. It is determined whether or not, if the accounting is required, the data modification control unit, after confirming that the accounting is performed by an accounting device provided outside the data copying device, the Controlling the correction of the data according to the copy permission flag and the quality control flag, if the charging is not required, the data correction control unit, without confirming that the charging by the charging device, A data duplication device that controls modification of the data according to the duplication permission flag and the quality control flag. 8. The data according to claim 7, wherein the correction control information is recorded on the first recording medium, and wherein the data reading unit reads the correction control information from the first recording medium. Duplication device. 9. The data duplication device according to claim 8, wherein the modification control information is encrypted. 10. The data duplication device according to claim 8, wherein the correction control information is included in a predetermined frequency band of the data recorded on the first recording medium. 11. The data duplication device according to claim 7, wherein the modification control information is input to the data modification control unit from outside the data duplication device. 12. The data copying apparatus according to claim 7, wherein said data correction control unit outputs correction data having a quality level according to said correction control information. 13. A data duplication method for duplicating data recorded on a first recording medium onto a second recording medium, comprising: (a) reading the data from the first recording medium; A) controlling the data modification in accordance with modification control information for controlling the data modification; and (c) writing an output of the data modification control unit to the second recording medium. The modification control information includes a duplication permission flag indicating whether to permit duplication of the data, a quality control flag for controlling the quality of modified data obtained by modifying the data, and the data And a charging control flag for controlling charging for the copy of the data. The step (b) comprises: (b-1) charging for copying the data according to the charging control flag is required. (B-2) if the billing is required, confirming that the billing has been performed, and then determining the billing according to the copy permission flag and the quality control flag. Controlling the modification of the data; and (b-3) if the accounting is not required, modifying the data according to the copy permission flag and the quality control flag without confirming that the accounting has been performed. Controlling the data replication. 14. A computer-readable recording medium recording a program for causing a computer to execute a data duplication process of duplicating data recorded on a first recording medium onto a second recording medium, wherein the data is The duplication processing includes: (a) reading the data from the first recording medium; and (b) controlling the correction of the data according to correction control information for controlling the correction of the data. (C) writing the output of the data modification control unit to the second recording medium, wherein the modification control information includes a duplication permission flag indicating whether or not duplication of the data is permitted; Quality control flag for controlling the quality of corrected data obtained by correcting the data, and charging control for controlling charging for copying the data. Lag; and (b-1) determining whether charging is required for copying the data in accordance with the charging control flag; If charging is required, after confirming that the charging has been performed, controlling the modification of the data according to the copy permission flag and the quality control flag; and (b-3) requiring the charging. If not, controlling the modification of the data according to the copy permission flag and the quality control flag without confirming that the charge has been made. 15. A recording medium on which data and modification control information for controlling modification of the data are recorded, wherein the modification control information indicates whether or not duplication of the data is permitted. A recording medium comprising: a permission flag; a quality control flag for controlling quality of corrected data obtained by correcting the data; and a charging control flag for controlling charging for copying the data.