WO2001033546A1 - Procede et dispositif de transmission de donnees numeriques, procede et dispositif de reproduction de donnees numeriques, procede et dispositif de copie de donnees numeriques, support d'enregistrement de donnees et procede de stockage/reproduction de donnees numeriques - Google Patents

Procede et dispositif de transmission de donnees numeriques, procede et dispositif de reproduction de donnees numeriques, procede et dispositif de copie de donnees numeriques, support d'enregistrement de donnees et procede de stockage/reproduction de donnees numeriques Download PDF

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Publication number
WO2001033546A1
WO2001033546A1 PCT/JP2000/007550 JP0007550W WO0133546A1 WO 2001033546 A1 WO2001033546 A1 WO 2001033546A1 JP 0007550 W JP0007550 W JP 0007550W WO 0133546 A1 WO0133546 A1 WO 0133546A1
Authority
WO
WIPO (PCT)
Prior art keywords
digital data
charging
data
billing
reproducing
Prior art date
Application number
PCT/JP2000/007550
Other languages
English (en)
Japanese (ja)
Inventor
Yoichiro Sako
Tatsuya Inokuchi
Junichi Kudo
Original Assignee
Sony Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corporation filed Critical Sony Corporation
Priority to KR1020017008260A priority Critical patent/KR20020003541A/ko
Priority to DE10083666T priority patent/DE10083666T1/de
Publication of WO2001033546A1 publication Critical patent/WO2001033546A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/254—Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2543—Billing, e.g. for subscription services
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/02—Synthesis of acoustic waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled

Definitions

  • Digital data transmission method and apparatus Digital data reproduction method and apparatus, digital data copy method and apparatus, data recording medium, and digital data storage / reproduction method
  • the present invention relates to a digital data transmission method and apparatus, a digital data reproduction method and apparatus, a digital data copy method and apparatus, a data recording medium, and a digital data storage and reproduction method applied to, for example, music distribution. It is.
  • EMD Electronic Music Distribution
  • networks such as the Internet and satellite broadcasting
  • a method of managing copyright in EMD has been proposed.
  • users can obtain music content by charging.
  • technologies such as the above-mentioned S CMS and copy generation restriction are used to prevent piracy. Trying to.
  • the conventional copyright protection method restricts copying by using copy protection technology and protects the rights of the copyright holder, so that the music content is distributed widely and in a short time.
  • a levy system as one of the conventional copyright protection systems. This is implemented in DAT (Digital Audio Tape Recorder) and MD (Mini Disc) as recordable optical discs, and users of digital recording equipment add to the product price. The paid compensation will be paid.
  • hardware players, media
  • content are one-to-one so that content delivered over the network can be received and played by personal computers. In many cases, such a levy system is not suitable as a copyright protection system.
  • a user may want to listen to only one or a few of them, and may not want to purchase the entire media. is there.
  • copy protection technology will hinder the promotion and distribution of music content. Rather, distributing music content free of charge allows the distribution and distribution of the music content to be performed in a shorter time, and it is also possible to reduce advertising and distribution costs.
  • an object of the present invention is to provide a digital data transmission method and apparatus, which enable easy and quick distribution of contents and allow a copyright owner to obtain a fair price.
  • An object of the present invention is to provide a method and apparatus for reproducing data overnight, a method and apparatus for copying digital data, a recording medium for recording data, and a method for storing and reproducing digital data. Disclosure of the invention
  • the invention of claim 1 distributes compression-encoded and Z- or encrypted digital data free of charge, and charges a fee for decoding digital data distributed free of charge.
  • This is a digital data transmission method characterized by performing processing.
  • the invention according to claim 23 is a digital data distribution means for distributing compression-encoded and Z- or encrypted digital data free of charge, and a digital data distribution means for decoding digital data distributed free of charge and performing charging processing.
  • a digitizing and transmitting apparatus comprising a decoding and decoding means.
  • the invention according to claim 24 is a reproduction method for reproducing digital data which is free to be distributed and which has been subjected to compression encoding and / or encryption,
  • a digital data reproducing method characterized in that a billing process is performed when decoding digital data.
  • the invention according to claim 25 is a playback device whose delivery is free and which plays back the digital data compressed and / or encrypted,
  • the invention according to claim 26, which is a digital data reproducing apparatus characterized by including a billing processing unit for performing a billing process when decoding the digitized data, wherein the distribution is free, and
  • This is a data recording medium in which first digital data whose reproduction is charged and second digital data whose distribution is charged and whose reproduction is free are recorded.
  • the invention of claim 27 is a compression-encoded and Z-encrypted In a digital data reproducing method for reproducing digital data, a step of judging whether or not the digital data is digital data subject to billing;
  • the invention according to claim 43 is a billing processing unit that performs a charging process when decoding digital data in a digital data reproducing apparatus that reproduces compressed encoded and Z- or encrypted digital data.
  • the invention according to claim 4 is a digital data copying method for copying compressed and / or encrypted digital data, and a step of determining whether or not the digital data is digital data subject to charging.
  • the invention of claim 4 5 is characterized in that the compression-encoded and / or encrypted A charge processing unit configured to perform a billing process when decoding digital data in a digital data copying apparatus that copies digital data;
  • a digital data copying apparatus comprising: a control unit that controls a charging processing unit so that charging processing is not required when copying is performed.
  • a data recording medium characterized in that accompanying information related to digitized data is recorded, and an identifier indicating whether the digitized data is digitized data or not is included in the attached information.
  • the invention of claim 47 captures the distributed compressed and Z or encrypted digital data without performing the charging process, and captures the digital data after performing the charging process when reproducing the captured digital data. This is a method of storing and reproducing digital data for reproducing digital data.
  • the invention according to claim 61 captures the distributed compressed and / or encrypted digital data without performing a billing process, and reproduces the captured digital data when the digital data is reproduced. Determines whether the data requires billing,
  • the digital data is reproduced after performing billing processing. This is a method for storing and reproducing digital data.
  • the invention according to claim 75 reads compressed and / or encrypted digital data from a medium without performing a charging process, and reads the read digital data after performing a charging process when reproducing the digital data. This is a method for storing and reproducing digital data.
  • the invention according to claim 8 reads out the compressed and Z or encrypted digital data from the medium without performing the charging process, and charges the digital data when reproducing the read digital data. Determine if the data needs to be processed,
  • FIG. 1 is a block diagram schematically showing an entire system according to a first embodiment of the present invention.
  • FIG. 2 is a block diagram for explaining prepaid data in the first embodiment of the present invention.
  • FIG. 3 is a block diagram of an example of a player according to the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing an example of a data format of accompanying information according to the first embodiment of the present invention.
  • FIG. 5 is a flowchart for explaining an example of a charging process according to the first embodiment of the present invention.
  • FIG. 6 is a flowchart for explaining another example of the accounting process in the first embodiment of the present invention.
  • FIG. 7 is a diagram showing charging for copying in the first embodiment of the present invention.
  • 5 is a flowchart illustrating an example of a process.
  • FIG. 8 is a schematic diagram showing an example of a data format of accompanying information according to the second embodiment of the present invention.
  • FIG. 9 is a flowchart for explaining an example of a charging process according to the second embodiment of the present invention.
  • FIG. 10 is a flowchart for explaining an example of the accounting process according to the second embodiment of the present invention.
  • reference numeral 101 indicates a content provider
  • reference numeral 102 indicates a content server.
  • Content provider 101 produces and distributes content.
  • the record company is one of the content providers 101.
  • the content provider 101 also performs compression encoding, encryption, and embedding of watermarks on the content.
  • the content server 102 stores the content produced by the content provider 101.
  • the designation code 103 indicates a copyright management mechanism.
  • JASRAC Java Music Copyright Association
  • the content provider 100 registers the rights with the copyright management organization 103 and receives a copyright fee from the copyright management organization 103.
  • Reference numeral 104 indicates a user device having a function of playing back content.
  • the user device 104 reproduces the distributed content.
  • the content can be reproduced by decrypting the cipher applied to the distributed data and decoding the compression encoding.
  • a content distribution company intervenes to distribute the content in the content server 102 to the user.
  • Distribution companies There are several distribution methods used by distribution companies. One way is through the dealer 105. For example, as an appendix to a magazine, a medium on which the content is recorded is distributed, and the user obtains the content by purchasing the magazine. It is also conceivable to use a wired network 106 such as an Internet connection network or CATV (cable television) as a content distribution means.
  • a satellite network 108 such as a mobile phone network 107, satellite broadcasting, satellite communication, etc. may be used as a content distribution means.
  • the user connects devices such as personal computers. The content is played back from the night including the content that was distributed using it.
  • the present invention does not prevent the use of the delivery means of the content delivered for a fee as the content delivery means described above.
  • the copyright fee for the recorded music is included in the CD price. Distribution may be free, and the content charged for decryption (playback) may be recorded in an area on the CD that is different from the area where the paid content is recorded.
  • an optical disk 121 is shown as one of the media distributed by the store 105.
  • the area 122 on the inner circumference side of the optical disk 122 is an area in which music data in the same format as an existing CD is paid for distribution and free to play.
  • the outer peripheral area 1 2 3 of the optical disk 1 2 1 stores contents to which the present invention is applied, that is, contents that are free to be distributed and paid for playback, such as music data. Area. Since the music data recorded as content in the area 123 is compression-encoded, the required length of music data can be recorded even if the area 123 is narrow.
  • the areas that can be distinguished from each other can record both pay-for-distribution and free-to-play content and free-to-distribution and pay-for-play content.
  • the aforementioned MD, a memory card using a semiconductor memory, or an IC card can also be used as a storage medium.
  • content data itself that is free to be distributed and paid for playback may be distributed using a service that distributes music content using satellite television broadcasting.
  • the user device 104 can receive the content free of charge by obtaining the optical disk 121 or by using the content distribution service. Redistribution of received content is also free.
  • the unique identifier of the source device or playback device is redistributed together with the content, so that the distribution history of the content can be recorded in the billing / settlement center described later. And the playback / decoding history of the content.
  • the content may be distributed with an identifier indicating the type of media on which the content was stored.
  • “free” does not include actual expenses such as telecommunications expenses and electricity bills, and means that copyright fees are free.
  • Billing is performed when the user device 104 plays back the received content, more specifically, when decrypting the encryption of the data including the content.
  • Prepaid data 109 is used for billing processing.
  • the prepaid data 109 is stored in a prepaid card or a memory in a secure decoder. .
  • the prepaid data 109 can be rewritten by a charging charger under the control of a prepaid data management company in the memory of the prepaid data and secure decoder.
  • the prepaid data 109 is, for example, the frequency at which the content can be reproduced. Each time the user device 104 reproduces the content to be charged, the frequency at which the content can be reproduced is decremented.
  • Billing Z settlement center 110 for settlement with the content provider 101, the copyright management mechanism 103, and the user device 104.
  • the billing Z settlement center 110 is provided with an authentication Z billing server 111.
  • Billing Z settlement center 110 is a bank, credit company, etc. In fact, the host computer of the bank or credit company automatically performs the following processing.
  • the user device 104 When playing back the content received by the user device 104, the user device 104 requests the authentication server 111 to authenticate the user device 104 (indicated by a route A1). . Authentication Z The billing server 1 1 1 is authentic for the user device 104, and when authentication is established, the authentication billing server 111 requests the user device 104 for billing (path A 2). Further, the user device 104 performs payment settlement with the charging Z settlement center 110 (path A 3).
  • the billing Z settlement center 110 notifies the authentication billing server 111 of the fact that the billing has been made, as shown by the route A4, and the content server 102 includes the data including the content.
  • a command is sent to send a key to decrypt the encryption that has been performed overnight (path A5).
  • the content server 102 passes the key data for decrypting the encryption to the authentication Z charging server 111 (path A 6).
  • Authentication Z billing server 1 1 1 received from content server 102 for user device 104 The key data is transmitted (path A7).
  • the user device 104 can decrypt the encrypted data including the content using the transmitted key data and reproduce the data including the content.
  • the frequency of the stored data 109 is set to, for example, "1 1".
  • the frequency reaches “0”
  • the user device 109 cannot decrypt the data including the content, that is, cannot reproduce the data including the content overnight.
  • FIG. 2 shows an example of a management system for the prepaid data overnight.
  • the player 201 is shown as corresponding to the user 104.
  • the player 201 has a built-in secure decoder 202.
  • the player 201 is, for example, a portable audio recording / reproducing device.
  • music data as data including content is recorded on a medium (optical disk, memory card, etc.) reproduced by the player 201.
  • various methods for distributing music data can be used.
  • the secure decoder 202 communicates with the prepaid data charger 204, and the prepaid data is transferred from the prepaid data charger 204 to the memory in the secure decoder 202. .
  • the prepaid data corresponds to, for example, information on the number of reproducible times of the player 201, so-called reproducible frequency or reproducible time.
  • the playback history information (playback log) of the player 201 is transmitted from the player 201 to the prepaid data charger 204.
  • the playback log includes information such as the type of music content that has been listened, the number of times of playback, and the playback time.
  • Prepaid data overnight is a prepaid data management company
  • the data is transferred from the prepaid data vending machine 206 corresponding to the amount of cash paid by the user to the prepaid data charger 204. For example, if a user has a contract with a prepaid management company to purchase a prepaid data equivalent to 30000 yen per day or a prepaid data equivalent to the reproducible time, 300 A prepaid data equivalent to $ 100 is sent to charger 204.
  • the playback log downloaded from the player 201 to the prepaid data charger 204 is passed to the prepaid data overnight management company 205 or the prepaid data overnight vending machine 206.
  • the prepaid data vending machine 206 receives the prepaid data from the prepaid data management company 205 and sends the playback log to the prepaid data management company 205. Further, the prepaid vending machine 206 pays the prepaid data overnight obtained from the management company 205 to the management company 205.
  • the prepaid data and the reproduction log are transmitted and received via the telephone line 207, for example.
  • billing Z payment centers 208 such as banks and credit companies.
  • the billing Z payment center 208 corresponds to the prepaid data written in the secure decoder 202 based on the request of the prepaid data management company 205 from the user's pre-registered bank account. Withdraw money.
  • the amount of prepaid data written to the secure decoder 202 is a fixed amount based on a contract concluded between the user and the management company 205 as described above, or the prepaid charger 204 is Is the amount of data requested to the management company 205 via the Internet.
  • the prepaid data management company 205 is entrusted by the content provider 101 to manage services relating to the prepaid data service.
  • the prepaid company is a content provider 10 Provide technology related to prepaid data to 1 and pay a music listening fee.
  • the content provider 101 requests copyright management by registering the copyright with the copyright management organization 103, and Receive a copyright fee from the Rights Management Organization 103.
  • FIG. 3 shows the overall configuration of the player 201 having the secure decoder 202.
  • the secure decoder 201 is configured as a one-chip IC as indicated by a broken line.
  • the secure decoder 201 has a so-called tamper resistant configuration. That is, the secure decoder 201 is configured so that the contents of the decoder 201 cannot be known from the outside and cannot be falsified.
  • music data as data including compression-encoded and encrypted contents is recorded. Further, the data necessary for the above-described playback charging process is stored in the medium 1 along with the compressed and encoded music data.
  • compression-encoded and encrypted music data is referred to as content data
  • data for playback accounting processing is referred to as accompanying data.
  • the medium 1 used in the present invention a memory card, a recordable optical disk, a read-only optical disk, or the like can be used.
  • the medium 1 is transmitted via a network such as a satellite network, a network using a mobile phone, or the Internet.
  • the content data and the accompanying data recorded on the medium 1 are supplied to the secure decoder 202 via the interface 2.
  • An analog audio signal is output from the secure decoder 202.
  • the analog audio signal is converted into an audible sound by a speaker provided in the player 201 or a headphone connected to the player 201 via an amplifier or the like and reproduced.
  • the secure decoder 202 includes a decryption device 11 for decrypting a code, a decompression device 12 for compression encoding, and a DZA converter 13.
  • DES Data Encryption St and Ard
  • DES is one of the block ciphers that blocks plain text and performs cipher conversion for each block.
  • the DES performs a cryptographic conversion on a 64 bit input using a 64 bit key (56 bit key and 8 bit parity), and outputs 64 bits.
  • Content data may be encrypted using an encryption code other than DES.
  • DES is a common key method that uses the same key data for encryption and decryption
  • RSA encryption which is an example of public key encryption that uses different key data for encryption and decryption, may be used.
  • the key data is passed from the content server 102 to the user device 104 that has been successfully authenticated via the authentication / billing server 111, that is, the user device 104 that has been correctly recognized.
  • the secure decoder 202 includes a control unit 14 including a CPU, a CPU interface 15 for performing communication between the control unit 14 and an external CPU, a memory unit 16, and a prepaid data transfer unit.
  • a communication unit 17 and an antenna 18 are provided for receiving a playback log from the charger 204 and transmitting the playback log to the prepaid charger.
  • the control unit 14 includes a control unit 14 including a CPU, a CPU interface 15 for performing communication between the control unit 14 and an external CPU, a memory unit 16, and a prepaid data transfer unit.
  • a communication unit 17 and an antenna 18 are provided for receiving a playback log from the charger 204 and transmitting the playback log to the prepaid charger.
  • the decoder 11 receives the ancillary data separated at the previous stage of decoding, and controls each unit such as the decoder 11 and the decompressor 12 for decoding and decompressing the ancillary data and content. .
  • the communication section 17 and the antenna 18 are for performing communication between the player 201 and the prepaid day charger 204 in a non-contact manner. Communication of data between the player 201 and the charge 204 is performed using an encrypted protocol.
  • the communication between the player 201 and the charger 204 is not limited to the overnight support, and the player 201 can receive power from the charger 204. Even when the power of the power supply is off, the reception of the prepaid data and the transmission of the reproduction log can be performed with the charger 204.
  • the prepaid data received from the charger 204 is stored in the memory unit 16. Further, the playback log of the player 201 is stored in the memory unit 16.
  • the memory unit 16 is a non-volatile memory that retains its stored contents even when the power of the player 201 is turned off.
  • a copy output of the accompanying data and the content data can be output from the decoder 11 to the outside of the secure decoder 202.
  • the control unit 14 controls whether or not to output the accompanying data and the copy output of the content data to the outside.
  • the decoder 11 and the decompressor 12 have a function of not executing the decoding process and the decompression process based on the instruction of the control unit 14.
  • unencrypted audio data and uncompressed audio data for example, linear PCM, can be reproduced by the player 201. Can be played.
  • a system controller 21 is provided.
  • the system controller 21 is a CPU It is configured and controls the operation of the secure decoder 202 by communicating with the control unit 14 in the secure decoder 202.
  • the operation unit 22, display 23, memory unit 24, and modem 25 are connected to the system controller 21 via a bus. Further, the system controller 21 controls the operation of reproducing the medium 1 and the operation of the medium interface 2.
  • the operation unit 22 is a switch, a key, or the like operated by the user, and generates an instruction for controlling the operation of the player 201.
  • the display 23 is composed of, for example, a liquid crystal element, and is used for displaying a menu for controlling the operation of the player 201 and for displaying the operation state of the player 201.
  • the memory unit 24 is an external memory provided because the capacity of the memory in the system controller 21 is small.
  • the modem 25 is connected to a public line and used for data communication with the outside. For example, by transferring the playback log in the memory section 16 of the secure decoder 202 to the memory section 24, the remaining playable number or playable time is displayed on the display 23, and the playback log is displayed on the modem 2 5 can be transmitted. Furthermore, it is possible to receive the prepaid data via the modem 25.
  • the user operates the operation unit 22 to instruct reproduction of desired content data in the medium 1. If the content data specified by the user is free for reproduction, even if the content data read from the medium 1 is converted into an analog signal by the secure decoder 202 and output, the content data is stored in the memory unit 16. The prepaid date is not changed. If the content data specified and reproduced by the user is to be charged for reproduction, the prepaid data in the memory unit 16 is changed. For example, in this case prepaid Data is calculated by “1” or subtracted according to the content data playback time.
  • the billing process can be roughly classified into a purchase type, a type in which a viewing fee is charged to Daros, and a frequency type in which a viewing fee is charged each time encryption is performed by a secure decoder.
  • the purchase type is a type in which once the content is purchased, no charge is made when the content is played back.
  • the types that pay viewing fees to Daros include the monthly type, in which the viewing fee for reproducing content data is paid together, and the type that limits the viewing period and viewing time.
  • a frequency type in which a viewing fee is charged each time the encryption is decrypted by the secure decoder.
  • the amount or the frequency is subtracted from the predetermined amount (prepaid card, electronic money) or the frequency each time the content is reproduced. In this case, if the balance of the prepaid data or the remaining frequency is insufficient, the content data cannot be reproduced.
  • the second mode each time content data is reproduced, an amount or a frequency is added. In this case, if the fee corresponding to the accumulated amount or frequency is paid later on a monthly basis, or if the accumulated amount or frequency reaches the amount or frequency set in advance by a contract with the prepaid data management company 205, Content can not be played overnight.
  • the frequency or amount of the prepaid data is added or subtracted according to the reproduction time of the content data.
  • the payment of the fee to the management company 205 or the like by the user can be made not only in advance but also in post-payment.
  • the amount or frequency of subtraction or addition of the prepaid data may be constant during playback of any content, or may be weighted according to the content data to be played back.
  • the billing process is performed in response to one title of content (one song in music example) or multiple titles of content (album in music example).
  • the content reproduction processing it may be defined that the content has been reproduced when the entire content data has been reproduced, or the content data reproduction time may be longer than a predetermined time. In this case, the content may be defined as having been reproduced.
  • the playback of the first part of the content for example, the first 10 seconds from the beginning is free, or the playback of only the highlight part of the content is free, which is convenient for the user to select the content. May be measured. In this way, when the content charged for the reproduction process and the content free of charge for the reproduction process are mixed, the charge / recovery is performed by the accompanying data stored in the medium 1 with the content data. Free is identified.
  • Fig. 4 shows an example of the data structure of the accompanying data.
  • the accompanying data is data added before the distributed content data (compression-encoded and encrypted content data, for example, audio data).
  • the accompanying data is encrypted as needed.
  • on a recordable medium it is added before the content data and recorded, or is recorded in the data management area of the medium 1.
  • accompanying data is recorded in the data management area.
  • a management area is generally provided in the innermost area of the disk, Associated data is recorded in this management area.
  • the file management data is defined so that one piece of music data is treated as one file, and the accompanying data is stored in the storage area where the file management data is stored. You.
  • the accompanying data has a fixed value (fixed code) 301 at the beginning.
  • the fixed value 310 is a one-byte fixed code, for example, "01010101".
  • a fixed value of 301 indicates that subsequent data is associated data. The data following the fixed value 301 will be described in order.
  • Ancillary data related to charging based on a 1-byte charging identifier (hereinafter, the identifier is referred to as ID) 302, a 1-byte charging type 303, and a 32-byte charging condition 304.
  • ID 1-byte charging identifier
  • the billing ID 302 indicates whether the content is charged or free.
  • the billing type 303 is information for distinguishing the purchase type, the dalos type, the frequency type, and the like as described above.
  • the charging condition 304 is data representing information on the charging condition in each charging type.
  • the purchase price data of the content data is arranged (or recorded) as the charging condition 304, and in the case of limiting the number of times of reproduction of the Daros type content data described above, In the case where the data of the number of times of reproduction that can reproduce the content overnight is arranged as the charging condition 304 and the above-mentioned Daros type reproduction period is limited, the data of the reproduction period (one day, one week, one input) is set. , Etc.) are placed as charging conditions 304, and in the case of the frequency type described above, the frequency data (1 yen Z 2 minutes, 1 yen Z 1 minute, 1 yen / 30 seconds, ⁇ ) is charged Arranged as condition 304. Furthermore, even if the content is presumed to be charged, the conditions for free viewing can be set as charging conditions 304. You can also.
  • C ⁇ D E C type 305 is one byte, and is used to indicate a type of compression encoding of content data.
  • compression coding there are AAC (Advanced Audio Coding), MP3 (MPEG1 Audio Layer III), ATRAC (Adaptive Transform Acoustic Coding), ATRAC 3 of MPEG2 (Moving Picture Experts Group Phase2) and the like.
  • ATRAC 3 is an improvement on ATRAC used in MD mentioned above, and achieves a higher compression ratio.
  • a CODE C software may be transmitted as an accompanying data.
  • the CODE C software is used for decompressing content data by a personal computer, or loaded into the DSP in the player 201, and used for decompressing content data by software.
  • a one-byte channel 306 is arranged.
  • Channel 306 is a data identifier for identifying the number of audio channels.
  • the number of audio channels such as mono, stereo, and 5.1 channels of the content data is identified by the channel 306.
  • a one-byte bit rate 307 is arranged.
  • the bit rate 307 is data for identifying the bit rate of the content data, for example, 64 Kbps, 128 Kbps, 192 Kbps, 256 Kbps, and the like.
  • a one-byte encryption type 308 is arranged.
  • the encryption type 308 is a data type that identifies the type of encryption (DES, RSA, etc.). If all the encryption types 308 are "0", it may be specified that the encryption is not performed.
  • Encryption type 3 After 08, a one-byte symbol parameter 309 is arranged. The encryption parameter 309 is used to indicate the bit length of the encryption key. For example, 12 bytes after the encryption parameter 309 is reserved (undefined) area 310 in consideration of future expansion.
  • the fixed value 311 following the reserved area 310 indicates that the area 312 in which the media ID is arranged follows.
  • the media ID in the area 312 is used to uniquely identify media such as CDs, MDs, recordable optical disks, and memory cards including non-volatile memory.
  • This media ID is represented by, for example, 8 bytes.
  • the media ID is stored, for example,
  • the fixed value 3 13 is placed after the area 3 12 where the media ID is stored.
  • the fixed value 3 13 indicates that the area 3 14 in which the decoder ID is arranged follows.
  • the decoder ID is an ID for uniquely identifying a secure decoder built in a user terminal, a user player, or the like, for example, a serial number.
  • 32 decoders ID can be arranged.
  • the media ID and the decoder ID are transmitted to the management company 205 and the like via the charger 204 together with the playback log, and the playback logs of the media and the secure decoder are individually managed by the computer of the management company 205 and the like. Can be determined.
  • the first step S 1 is a playback standby state in which the content data to be played back exists on the medium 1. is there. Specifically, when the delivered content data is stored in the medium 1 or when the content data is already recorded on the medium 1, it corresponds to the reproduction standby. In step S2, it is determined whether or not a reproduction instruction has been issued by the user pressing the reproduction button of operation unit 22.
  • step S3 it is determined whether or not the operation is a copy operation of content for free reproduction.
  • the content of free reproduction means content for which charging processing is not performed due to reproduction of the content data overnight.
  • the billing ID 302 in the accompanying data overnight FOG. 4
  • step S3 it is determined in step S3 whether or not the content is free playback. If the content is free-to-play content, the copy output of the decrypted and decrypted content data from the secure decoder 202 is prohibited for copyright protection, that is, the content data cannot be copied to other devices. Alternatively, copying to a medium is prohibited (step S 4).
  • step S3 If it is determined in step S3 that the content is not a copy of the content for free playback, that is, if it is determined that the content is a copy operation for content playback for billing playback, the content data for billing playback is transferred to another device or It is output from the secure decoder 202 so that it can be copied to a medium (step S5). In this way, the content data of the charge reproduction can be freely copied by another device or to the medium.
  • the data output from the secure decoder at this time is the content data that has been encrypted and compressed and encoded with the accompanying data.
  • step S6 If it is determined in step S2 that the reproduction operation has been instructed, it is asked in step S6 whether or not to accept the accounting process. For example, a message is displayed on the display 23 of the player 201, and the user is prompted to respond by operating the operation unit 22 whether or not to accept the billing process. If the user does not accept the billing process, the content data cannot be reproduced (step S7). However, in the case of partial free playback indicated by the playback condition 304 of the content, for example, it may be permitted to play the beginning or highlight portion of the song free of charge. In some cases, content data can be previewed even if the billing process is refused.
  • step S8 the reproduction charging condition relating to the content data to be reproduced is presented on the display 23.
  • the charging condition is presented to the user based on the information of the charging type 303 and the charging condition 304 in the accompanying data, and the process proceeds to step S9.
  • step S9 the user selects and determines whether the charging type is the purchase type. If the charging type selected and determined in step S9 is the purchase type, a charging process for purchasing content data is executed in step S10, and the process proceeds to step S11.
  • step S 11 the decoder 11 of the secure decoder 202 decrypts the encryption using the key data supplied from the server 102 via the server 111, and
  • step 12 content data is reproduced free of charge. Free playback here means that no new costs are incurred other than the costs incurred in purchasing the content data overnight because the content data to be played has already been purchased and the user owns it. In this case, redistribution / copying, including transmission to other users of Contentede for free playback, is prohibited.
  • step S9 if the user selects and determines that the charging type is not the purchase type, the charging type is set in step S13. For example, the user selects or determines whether it is a monthly type. If there is a monthly contract, in step S14, for example, if the monthly contract has been set so that the accumulated billing can be played back to ⁇ 300 per month, the limit is still ⁇ 300 It is determined whether the amount has not been reached. If the limit has not yet been reached, the content data is reproduced free of charge in step S15. Here, free reproduction indicates that there is no additional cost for reproducing content data within the contract limit. In this case, redistribution, including copying of the content and transfer to other users, can be freely performed together with the accompanying data.
  • step S13 if the user selects and determines that the charging type is not the monthly type, it is determined that the content data is to be charged on a frequency basis.
  • step S17 the secure decoder 202 decrypts the encrypted content, and in step S18, charging reproduction is performed.
  • charging reproduction in step S18 as described above, charging is performed according to the frequency of reproduction of the content data, the reproduction time, and the like. In this case, you can freely copy the contents for one night.
  • step S14 if it is determined in step S14 that the contract is not within the range of the monthly contract, for example, even if the contract limit is already exceeded, the charge reproduction process (step S14) 17. Step S18) is performed.
  • FIG. 6 shows another example of the accounting process.
  • Billing type is buy
  • the process up to step S9 in which the user selects and decides whether or not to take a cast is the same as that shown in FIG. 5, and therefore is omitted in FIG.
  • step S9 when the charging type is selected and determined by the purchase type and the user, in step S21, it is determined whether charging is possible based on the prepaid data held in the player 201 of the user. Is done. If charging is possible, free reproduction is performed in step S22 in the same manner as in step S12.
  • steps S 10 purchase processing for purchase
  • step S 11 decryption of encryption
  • step S23 replenishment and replenishment of the amount of money to the prepaid data is required.
  • the user operates the operation unit 22 of the player 201 to activate the replenishment menu and replenish the amount or frequency of the prepaid data online. Instead of being online, the reproduction process may be temporarily interrupted, and the player 201 may be connected to the charger 202 to perform replenishment.
  • step S24 it is determined again whether charging is possible. If it is determined in step S24 that charging is possible, the process proceeds to step S22. If it is determined in step S24 that charging is not possible, the process proceeds to step S25, as in the case where it is determined that the charging type is not the purchase type in step S9. In FIG. 6, the fact that the charging type is determined not to be the purchase type in step S24 determines that the charging type is the frequency type.
  • Step S25 is a step of inquiring the user whether to accept the accounting process.
  • the display 2 3 of the player 201 An inquiry message is displayed above.
  • the user inputs an answer as to whether or not to accept the charge by operating the operation unit 22. If the user does not accept the charge in step S25, playback of the content cannot be performed overnight (step S26). However, as described above, the reproduction of the free reproduction portion indicated by the reproduction condition 304 in the content data may be permitted.
  • step S25 when the user accepts the charging, in step S27, it is determined whether charging is possible by looking at the prepaid data (balance, remaining frequency, etc.). If it is determined in step S27 that charging is possible, charging playback of the content is executed in step S28. In the charging reproduction performed in step S28, charging processing is performed according to the reproduction time. For example, a fixed amount is charged for 10 minutes from the start of reproduction, and charging processing is performed again after 10 minutes. Although not shown in FIG. 6, the process of step S17 (decryption of the encryption) in FIG. 5 is executed, and the content is reproduced. Redistribution of the content data copy / delivering in step S28 can be freely performed as in step S18 in FIG.
  • step S28 When charging playback is performed in step S28, for example, a timer provided in the control unit 14 is started, and in step S29, whether a certain time has elapsed since the start of playback and a time-out occurs. Is determined. If it is determined in step S29 that the predetermined time has elapsed since the start of the playback of the content data, the process returns to step S27 to determine again whether charging is possible. As a result, the prepaid data does not remain as much as the content can be played back all night, thereby preventing charging playback even though charging processing cannot be performed.
  • step S27 If it is determined in step S27 that charging is not possible, Then, the process proceeds to step S30, in which the user is required to supplement a fee for performing a billing process. Thereafter, in step S31, it is determined again whether charging is possible. If it is determined in step S31 that the user has no money reimbursement or the like and charging cannot be performed again, the content data cannot be reproduced in the evening (step S32). In step S31, the user makes up for money, etc., and if it is determined that billing is possible again, the process proceeds to step S28 to perform billing reproduction processing.
  • FIG. 7 is a flowchart of an example of such content data copy control processing.
  • the first step S41 is a copy standby state generated by the user operating a copy operation button or the like of the operation unit 22.
  • step S42 it is determined whether or not the content data to be copied is a charging target, that is, whether or not the content data is a paid content data. If the content data to be copied in step S42 is not chargeable, that is, free content data, copying of the content data is permitted (step S43). If the content data to be copied is to be charged, it is determined in step S44 whether or not the user accepts the charging required for copying the content. If the user does not accept being charged in step S44, copying of the content data is disabled (step S45).
  • step S44 when the user accepts the billing, Proceeding to step S46, it is determined whether charging is possible. The balance of the prepaid data, the remaining frequency, and the like are checked, and if charging is possible, the process proceeds to step S47, where charging is performed, and the content data is copied. If it is determined in step S46 that there is no remaining prepaid data, the number of remaining times, or if there is not enough remaining data to be reproduced and charging is not possible, the user is prompted to replenish the prepaid fee (step S4 8). Although omitted in FIG. 7, if the user makes up for the prepaid data and replenish money after step S48, the content data can be copied.
  • FIG. 8 a data recording and Z or reproducing apparatus and a method thereof according to a second embodiment of the present invention will be described with reference to FIG. 8 and subsequent figures. Note that the same reference numerals are given to portions common to the above-described first embodiment, and the detailed description of the first embodiment is used.
  • FIG. 8 shows another example of the data structure of the accompanying data.
  • the accompanying data is data added before the distributed content data (compression-encoded and encrypted content, for example, audio data).
  • the accompanying data will be decoded together with the content data as needed or independently.
  • on a recordable medium it is added before the content data and recorded, or is recorded in the data management area of the medium 1.
  • accompanying data is recorded in the data management area.
  • an optical disc since a management area is generally provided in the innermost area of the disc, accompanying data is recorded in this management area.
  • file management data is defined so that one piece of music data is treated as one file, and an accompanying data is stored in a storage area where the file management data is stored.
  • the accompanying data has a fixed value (fixed code) 501 at the beginning.
  • the fixed value 501 is a fixed code of one byte (8 bits), for example, "1111110000".
  • the fixed value 501 indicates that subsequent data following the fixed value 501 is accompanying data.
  • the data following the fixed value 501 will be described in order.
  • the 8-bit content total number 502 indicates the total number of contents in a package, for example, an optical disk. After that, the content number 503 (8 bits) is allocated (recorded). The content number 503 indicates the order in the total number of contents recorded on the optical disc, for example, and the first # 1 content is arranged first. Content Namer-The unit of 256 bits starting from 503 indicates the accompanying information on # 1.
  • the title 504 (128 bits) of the content is arranged.
  • the title 504 describes the title of the title and the International Standard Recording Code (ISRC) (copyright code).
  • ISRC International Standard Recording Code
  • the language and code for describing the title name are specified in advance.
  • 4-bit flags FLG1 (505), FLG2 (506), FLG3 (507), and FLG4 (508) are arranged.
  • the flag FLG 1 (505) indicates whether the content is copyrighted. In the case of content without copyright, the flag FLG 1 is set to 000000.
  • An example of content without copyright is, for example, content whose copyright has expired due to expiration of the protection period under the Copyright Act.
  • the flag FLG 2 (506) indicates whether or not the content data is to be encrypted. In the case of unencrypted content, the flag FLG2 is set to 000000. Generally, content data without copyright is not encrypted .
  • the flag FLG3 (507) indicates whether the content is for promotion. In the case of promotion content, the flag FLG3 is set to 000000.
  • the additional information related to charging is composed of an 8-bit charging type 509 and a 96-bit charging condition 510.
  • the charging type 509 is information for distinguishing which charging type among the purchase type, the dalos type, the frequency type and the like among the charging types described above.
  • the billing process condition 310 is data representing information on a billing process condition in each billing type indicated by the billing type 509.
  • the charging type is the purchase type
  • the purchase price data is placed (or recorded) as the charging condition 510
  • the charging type is the gross type and the number of content data playbacks is limited
  • the content In the case where the data on the number of reproducible times of data is placed as the charging processing condition 5 10 and the charging type limits the reproduction period of the content data of DAROS type, the data on the reproducible period of the content data (1 day, 1 week, 1 month, etc.) are placed as billing conditions 5 110, and when the billing type is frequency type, frequency data (1 yen Z2 minutes, 1 yen / 1 minute, 1 yen Z30 seconds, ⁇ ⁇ ⁇ ) Are arranged as the billing conditions 5 10.
  • the section Even if the content is premised on money, the condition for viewing the content for free can be set as the charging processing condition 5 10.
  • Content number # 2 Information about the next content (content number # 2) is placed after the information about content number # 1 (256 bits).
  • the structure of the information on the content number # 2 has the same data arrangement as that on the content number # 1 described above. Hereinafter, information on all contents in the package is recorded.
  • the first step S51 is a reproduction standby state where the content data of the content to be reproduced exists on the medium 1. Specifically, when the delivered content data is stored in the medium 1 or when the content data is already recorded on the medium 1, the playback standby is applied.
  • step S52 one of flags FLG1 (505) to FLG4 (508) is referred to by referring to flags FLG1 (505) to FLG4 (508) in the accompanying information. It is determined whether the content data to be reproduced is the content data that needs to be charged by determining whether or not the flag is also (0000).
  • step S52 the content data to be reproduced is determined to be content data that does not require billing.
  • step S53 it is determined with reference to the flag FLG2 whether or not the content is an encrypted content overnight. If it is determined in step S53 that the content to be played back is encrypted, In step S54, the encryption of the content data is decrypted, and in step S55, free reproduction is performed. If the content is unencrypted overnight, the program will be played for free in step S55, skipping step S54. The decryption of the cipher is performed using the key in the decryptor 11 of the secure decoder 202.
  • step S56 the accompanying information is set. It is determined whether or not the content data has been purchased with reference to the accounting processing condition 5 10 in the middle. If it is determined in step S56 that the content data to be reproduced is not the purchased content data, the process proceeds to step S60 in the flowchart of FIG.
  • step S57 the content data to be reproduced refers to the flag FLG2 (506). Then, it is determined whether or not the content data is encrypted. If it is determined in step S57 that the content to be reproduced is encrypted, encryption is decrypted in step S58, and free reproduction is performed in step S59. If it is determined that the content data to be played back in step S57 is unencrypted content data, step S58 is skipped and free playback is performed in step S59.
  • the free playback here has the same meaning as the free playback in step S12 of the flowchart shown in FIG.
  • step S59 means that the content data is free to play because the content data has been purchased in advance, and redistribution including transmission of the content data to other users and content distribution Copying to other media etc. is prohibited.
  • step S12 of the flowchart shown in FIG. 5 described above the move is performed, that is, unlike copy, there is no content data left on the copy source side, and there is content data that can be reproduced only at the copy destination. Processing is possible.
  • step S60 whether or not to purchase is selected and determined by the user.
  • the purchase condition is presented to the user, and the user decides based on the presented condition. For example, a purchase condition and an inquiry message are displayed on the display 23 of the player 201. Based on the displayed contents, the user responds as to whether or not to buy by operating the operation unit 22.
  • step S61 the user is charged for purchasing the content data based on the prepaid data of the player 201. It is determined if possible. If it is determined in step S61 that charging is possible, the process proceeds to step S22, and the content data is reproduced without performing charging processing. Although omitted in FIG. 10 due to the drawing space, steps S53 and S57 (encrypted in FIG. 9) are inserted between step S61 and step S62. Is determined) and steps S59 and S58 (encryption processing) are performed. If it is determined in step S61 that charging for purchasing the content overnight is not possible, the process proceeds to step S63, and the user is requested to replenish the amount.
  • step S64 it is determined again whether charging for purchasing the content data is possible. If it is determined in step S64 that charging is possible, the process proceeds to step S22, and the content data is reproduced. If it is determined in step S64 that charging for the purchase of the content overnight is not possible, the process is performed in the same manner as when it is determined that the content data is not purchased in step S60. Proceed to S65.
  • Step S65 is processing for inquiring whether to accept the charge.
  • this step S65 for example, an inquiry message is displayed on the display 23 of the player 201.
  • the user responds by operating the operation unit 22 whether or not to accept the charge. If the user does not accept the billing in step S65, the process proceeds to step S66, and the reproduction of the content data is disabled. However, partial free reproduction of the content data to be reproduced in accordance with the charging processing condition 5100 may be permitted.
  • step S65 when the user has accepted the charging, the process proceeds to step S67, and it is determined whether charging is possible by looking at the prepaid data (balance, remaining frequency, etc.). If it is determined in step S67 that billing is possible, a billing process is performed, and the content is played back overnight (step S68). If the content data is charged and played in step S68, the control unit 14 starts the timer provided in the control unit 14, and in step S69, the content data is reproduced. It is determined whether a predetermined time has elapsed from the start of data reproduction. When a predetermined time has elapsed from the start of the reproduction of the content data in step S69, the process returns to step S67 to determine whether or not charging is possible. As a result, reproduction is prevented even though charging cannot be performed.
  • step S70 the user is requested to replenish the charge or the like. Thereafter, it is determined in step S71 whether billing is possible. If it is determined in step S71 that charging cannot be performed again, playback of the content is disabled (step S72). If it is determined in step S71 that billing is possible, the flow returns to step S68, and the process of reproducing the content data is performed.
  • audio content has been mainly described.
  • content other than audio such as video data, still image data, character data, computer graphic data, game software, and computer programs, is also described above.
  • the present invention can be applied in the same manner as described above.

Abstract

L'invention concerne un magasin, un réseau câblé, un réseau de téléphone portable ou un réseau satellite servant à distribuer des contenus dans un serveur de contenu à des unités utilisateur. Ces contenus sont cryptés et codés par compression. Des informations associées, et notamment des informations sur la facturation et les conditions de facturation, sont également transmises. Chaque unité utilisateur opère un décryptage et une décompression de façon à reproduire lesdits contenus, et effectue une facturation au moment de la reproduction. La distribution des contenus est gratuite, la reproduction facturée. La facturation s'effectue au moyen de données à prépaiement représentant le nombre de reproductions possibles et le temps de reproduction possible. Au moment de la reproduction contre paiement, un serveur d'authentification/facturation authentifie le dispositif utilisateur et envoie une clé requise pour le décryptage.
PCT/JP2000/007550 1999-10-29 2000-10-27 Procede et dispositif de transmission de donnees numeriques, procede et dispositif de reproduction de donnees numeriques, procede et dispositif de copie de donnees numeriques, support d'enregistrement de donnees et procede de stockage/reproduction de donnees numeriques WO2001033546A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020017008260A KR20020003541A (ko) 1999-10-29 2000-10-27 디지털 데이터 전송방법과 장치, 디지털 데이터재생방법과 장치, 디지털 데이터 복사방법과 장치, 데이터기록매체와, 디지털 데이터의 저장 및 재생방법
DE10083666T DE10083666T1 (de) 1999-10-29 2000-10-27 Verfahren und Vorrichtung zur Übertragung von digitalen Daten, Verfahren und Vorrichtung zur Wiedergabe digitaler Daten, Verfahren und Vorrichtung zum Kopieren digitaler Daten, Datenaufzeichnungsträger sowie Verfahren zur Speicherung und Wiedergabe digitaler Daten

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Application Number Priority Date Filing Date Title
JP30948399 1999-10-29
JP11/309483 1999-10-29
JP11/314102 1999-11-04
JP31410299 1999-11-04

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