JP2005267328A - Rental system of digital contents, recording device used for same system, reproduction device used for same system, recording software used for same system, and reproduction software used for same system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rental system of digital contents enabling a user to easily rent a recording medium, and a rental agent to easily collect the rental fee without managing rental information of the user. <P>SOLUTION: The rental system of digital contents comprises a content delivery center 110 having a content DB 112 preliminarily recording a content file in a state where reproduction information 1a of header information a thereof is absent, and delivering the content file; a delivery management center 120 having a piece data DB 122 preliminarily recording the reproduction information a1, and delivering the reproduction information 1a; the recording device 130 that is a terminal communicable with the content delivery center 10 and recording agent information in a memory part 135, the recording device being used to record the content file delivered from the content delivery center 110 to a storage medium α; and the reproduction device 140 communicable with the delivery management means 120, the reproduction device being used to reproduce the content file on the recording medium α. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a digital content rental system that distributes content files through a communication line, a recording device used in the system, a playback device used in the system, recording software used in the system, and the system. Related to playback software.

  In a store of a rental company that rents a recording medium such as a conventional DVD or CD, the user selects and removes an arbitrary recording medium from the display shelf, brings the recording medium to the counter, and is installed in the counter After the rental fee is settled at the register, the recording medium can be rented.

Incidentally, there is a register having a function of managing rental information of each user by reading an ID tag or the like attached to a recording medium with a dedicated reader (see Patent Document 1).
JP 2001-118037 A

  However, in the store form as described above, since the user has to bring the recording medium to the counter and settle the fee, the work from the rental to the rental is very roundabout. On the other hand, rental companies have to settle rental fees for each user using a register on the counter, and there is an essential problem that it is very difficult to manage the work and rental information of each user. It was.

  The present invention was devised in view of the above circumstances, and the object of the present invention is to allow a user to easily rent a recording medium and to manage rental information of each user by a rental company. It is an object of the present invention to provide a new digital content rental system that can easily collect rental fees without any problems.

  In order to solve the above-described problem, in the first digital content rental system of the present invention, a content file having header information and a data body is recorded in advance in a state where reproduction information included in the header information is missing. A server having a database, a content distribution means for distributing the content file via a communication line, and a server having a database in which reproduction information included in the missing header information is recorded in advance. A business that distributes data as data through a communication line, and that can communicate between the distribution management means for managing the use of the piece data and the content distribution means, while renting a content file to a user in a memory unit At least from the content distribution means Reproduction that is communicable between the recording device used for recording the received content file in the content file on the storage medium and the distribution management means and is used for at least reproducing the recording medium Device. In the system, when a request for downloading a content file is input to a recording device by a user, the recording device transmits the request to the content distribution unit via a communication line, and the content distribution unit The company information is transmitted to the recording device, and the recording device records the company information on the memory unit together with the content file on the recording medium. Thereafter, the user applies for the reproduction of the content file on the condition of charging. Is input to the playback device, the playback device transmits the application and the provider information on the recording medium to the distribution management means simultaneously or sequentially via the communication line, and the distribution management means sends the application etc. The billing information related to the application and the carrier information are recorded in the memory part at the same time or in succession, while the request Piece data of the related content file is transmitted to the playback device via the communication line, and the playback device plays back the data body of the content file using the header information and the piece data of the content file of the recording medium at the time of playback operation. After that, the distribution management unit is configured to count the total amount of billing for each business based on the billing information and business information for each predetermined period.

  The second digital content rental system of the present invention is a server having a database in which a content file having header information and a data main body is recorded in a state where a part of the data main body is missing. Content distribution means for distributing a file via a communication line, and a database in which position information indicating a part of the data body that has been lost and a part of the data body that is a part of the data body is recorded in advance While the server distributes a part of the data body via a communication line, it can communicate between the distribution management means for managing the use of the part of the data body and the content distribution means. On the other hand, it is a terminal in which information on business operators that rent content files to users is recorded in the memory unit, and at least a controller To communicate between the recording device used for recording the content file distributed from the content distribution means on the storage medium and the distribution management means, and to reproduce at least the content file on the recording medium And a reproducing apparatus to be used. In the system, when a request for downloading a content file is input to a recording device by a user, the recording device transmits the request to the content distribution unit via a communication line, and the content distribution unit The company information is transmitted to the recording device, and the recording device records the company information on the memory unit together with the content file on the recording medium. Thereafter, the user applies for the reproduction of the content file on the condition of charging. Is input to the playback device, the playback device transmits the application and the provider information on the recording medium to the distribution management means simultaneously or sequentially via the communication line, and the distribution management means sends the application etc. The billing information related to the application and the carrier information are recorded in the memory part at the same time or in succession, while the request A part of the data body of the content file concerned and the position information thereof are transmitted to the playback device via the communication line at the same time or before and after the playback device. Receiving and recording in the memory unit, reading out and reproducing the data body of the content file on the recording medium, recognizing the missing part of the data body with reference to the position information read out from the memory unit, A part of the data body is read and reproduced as the data of the missing part, and then the distribution management means totals the total amount of billing for each business based on the billing information and business information every predetermined period It is the composition to do.

  In the recording apparatus used in the first and second digital content rental systems, when the business information is recorded in the memory unit and a request for downloading the content file is input to the recording apparatus by the user, the request is received. Is transmitted to the content distribution means via the communication line, and when the content file is transmitted from the content distribution means via the communication line in response to the request, the content file and the operator information on the memory unit are recorded on the recording medium. It has the structure which has the function to record in. The same applies to the recording software used in the first and second digital content rental systems.

  When a user inputs an application for playing a content file, the playback device used in the first digital content rental system can simultaneously or simultaneously transmit the application and the carrier information on the recording medium via a communication line. When the piece data is transmitted from the distribution management unit via the communication line in response to the application, the piece data is recorded in the memory unit, and the content on the recording medium during the reproduction operation The configuration has a function of reproducing the data body of the content file using the header information of the file and the piece data on the memory unit. The same applies to the playback software used in the first digital content rental system.

  When a user inputs an application for playing a content file, the playback device used in the second digital content rental system can simultaneously or simultaneously transmit the application and the carrier information on the recording medium via a communication line. When a part of the data body and its position information are transmitted from the distribution management means via the communication line at the same time or around each other according to the application, The data body of the content file on the recording medium is read out and reproduced, and the data body is missing by referring to the position information read out from the memory part. It is configured to have a function of recognizing a part and reading out and reproducing a part of the data body on the memory part as data of the missing part. The playback software used in the second digital content rental system has the same contents.

  The playback device obtains an elapsed period from the time when the piece data transmitted from the distribution management means or a part of the data body is received, and when the elapsed period reaches a predetermined period, It can be set as the structure which has the function to delete a part etc. of a data main body.

  When the first and second digital content rental systems include software distribution means having a database in which the reproduction software is recorded in advance, a communication line is connected between the software distribution means and the user's computer. If the connection is made via the computer, the user's computer can be easily used as a playback device. In this case, when the user inputs a request for downloading the playback software, the computer transmits the request to the software distribution means via the communication line, and the software distribution means relates to the request. The reproduction software is transmitted to the reproduction device via a communication line, and the computer installs the reproduction software.

  The software distribution unit can be provided integrally with the content distribution unit or the distribution management unit.

  In the digital content rental system according to claim 1 of the present invention, when a content file is downloaded from the content distribution means in response to a user's request for a content file, the recording device records the business information together with the content file. When the application for reproduction of the recording medium is performed through the reproduction apparatus, the reproduction apparatus transmits the application and the operator information on the recording medium to the distribution management means, and the distribution management means responds to the user's reproduction application. Billing is performed, and then the total amount of billing for each business is calculated based on the billing information and business information on the memory unit, so the business does not need to settle the rental fee at the store, There is no need to manage rental information for each user. Therefore, the work in the rental video business can be simplified, which is very advantageous for making the store unattended. On the other hand, when a user rents a content file, the user operates a recording device installed in the store of the business operator to record the content file on a recording medium, and operates a playback device at home or the like to reproduce the content file. Since it is only necessary to apply and obtain piece data of the content file, the content file can be easily rented. Moreover, even if the user's recording medium is copied to another recording medium, the content file recorded on the recording medium cannot be reproduced unless piece data is obtained as a genuine user on the condition of charging. It is possible to reliably collect charges for secondary use while preventing unauthorized use of digital content, and to ensure the profits that should be originally obtained for content holders, etc., and to promote the distribution of digital content in this respect It becomes possible to plan.

  In the case of the recording apparatus used in the digital content rental system according to claim 2 of the present invention and the recording software used in the system according to claim 4, together with the content file downloaded from the content distribution means, the business operator Since the information is recorded on the recording medium, it is possible to specify at which company's store the content file was recorded. That is, it becomes possible to collect rental charges after the fact, and it is possible to omit the charge settlement function at the store of the business.

  In the case of the playback device used in the digital content rental system according to claim 3 of the present invention and the playback software used in the system according to claim 5, an application for playback of the content file is transmitted to the distribution management means. Since the data body of the content file can be reproduced only after the piece data transmitted from the distribution management means is received, unauthorized use of the content file can be prevented.

  In the digital content rental system according to claim 6 of the present invention, when the content file is downloaded from the content distribution means in response to the user's request for the content file, the recording device records the carrier information together with the content file. When the application for reproduction of the recording medium is performed through the reproduction apparatus, the reproduction apparatus transmits the application and the operator information on the recording medium to the distribution management means, and the distribution management means responds to the user's reproduction application. Billing is performed, and then the total amount of billing for each business is calculated based on the billing information and business information on the memory unit, so the business does not need to settle the rental fee at the store, There is no need to manage rental information for each user. Therefore, the work in the rental video business can be simplified, which is very advantageous for making the store unattended. On the other hand, when a user rents a content file, the user operates a recording device installed in the store of the business operator to record the content file on a recording medium, and operates a playback device at home or the like to reproduce the content file. Since it is only necessary to make an application and obtain a part of the data body of the content file and its position information, the content file can be rented easily. Moreover, even if the user's recording medium is copied to another recording medium, the content file recorded on the recording medium is reproduced unless a part of the data body is obtained as a genuine user on the condition of charging. Therefore, it is possible to reliably collect charges for secondary use while preventing unauthorized use of digital content, and to ensure the profits that should be obtained by content holders, etc. Can be promoted.

  In the case of the recording apparatus used in the digital content rental system according to claim 7 of the present invention and the recording software used in the system according to claim 9, together with the content file downloaded from the content distribution means, the business operator Since the information is recorded on the recording medium, it is possible to specify at which company's store the content file was recorded. That is, it becomes possible to collect a rental fee afterwards, and it is possible to omit the fee settlement function at the store of the business.

  In the case of the playback device used in the digital content rental system according to claim 8 of the present invention and the playback software used in the system according to claim 10, an application for playback of the content file is transmitted to the distribution management means. Since the data body of the content file can be reproduced only after receiving piece data transmitted from the distribution management means, unauthorized use of digital content can be prevented.

  In the digital content rental system according to the eleventh aspect of the present invention, the piece data transmitted when a predetermined period is reached from the time when the piece data or part of the data body and the position information thereof are transmitted from the distribution management means. Alternatively, since a part of the data body is deleted, illegal secondary use can be prevented.

  According to the reproducing apparatus used in the digital content rental system according to the twelfth aspect of the present invention and the reproducing software used in the system according to the thirteenth aspect, the same effect as that of the eleventh aspect can be obtained.

  In the digital content rental system according to the fourteenth aspect of the present invention, the user simply downloads the software for reproduction from the software distribution means and installs it on his / her computer, so that his / her computer can be easily used as a reproducing apparatus. be able to.

  In the case of the digital content rental system according to claim 15 of the present invention, if the software distribution means is provided integrally with the content distribution means or the distribution management means, an overlapping mechanism or the like can be omitted. There is an advantage in cost reduction.

  Embodiments of the present invention will be described below.

  First, a digital content rental system according to a first embodiment of the present invention will be described with reference to the drawings. 1 is a block diagram of a digital content rental system, FIG. 2 is a flowchart of playback software used in the system, FIG. 3 is a flowchart of a user registration interrupt program, and FIG. 4 is a flowchart of a piece data transmission interrupt program. FIG. 6 is a flowchart of a flowchart of a rental fee totaling interruption program shown in FIG. 5.

  In the digital content rental system 100 shown in FIG. 1, the content file having the header information a and the data main body b has lost the reproduction information a1 that is essential for reproducing the data main body b included in the header information a. A content distribution center 110 that has a content DB 112 recorded in advance in a state and distributes the content file via the communication line β, and a piece in which reproduction information a1 included in the missing header information a is recorded in advance The server having the data DB 122 distributes the reproduction information a1 as piece data via a communication line, and can communicate between the distribution management center 120 that manages the use of the piece data and the content distribution center 110. On the other hand, the memory unit 135 stores the content file to the user. Between the distribution management means 120 and the recording device 130 which is a terminal on which information on the operator performing the operation is recorded and is used to record at least the content file distributed from the content distribution center 110 on the storage medium α. The basic configuration includes a playback device 140 that is communicable and is used to play back at least a content file on the recording medium α.

  The communication line β is a digital line such as an optical communication line or an analog line such as a telephone line, and is used between the content distribution center 110 and the recording device 130 and between the distribution management center 120 and the reproduction device 140. We are trying to communicate with each other.

  The content file here is a data body b that is data such as music, video, still image, text, game or software, and a distribution management center 120 in which the content ID and piece data assigned to the data body b are stored. It has a data structure having content information a2 such as WEB address information. That is, after the reproduction information a1 included in the header information a is deleted from the content file having the header information a (reproduction information a1, content information a2) and the data body d, the data body b is encrypted with the decryption key c1. It becomes the composition. The lost reproduction information a1 is encrypted with another decryption key c2. The reproduction information a1 is data indicating the address value of the sector to be read from the data body b, the size of the data body b, and the like.

  The recording device 130 is a general-purpose computer installed in a rental company store. In the figure, 131 is a control unit such as a CPU, 132 is an output unit such as a monitor or speaker, 133 is an operation unit such as a keyboard or mouse, 134 is a reproduction / copying unit that reads / writes data from / to the recording medium α, 135. Is a memory unit such as a hard disk, and 136 is a communication unit for performing communication.

  The recording device 130 has a function of requesting the content distribution center 110 to download a content file in response to a user input, and then recording the downloaded content file together with business operator information.

  The memory unit 135 stores recording software (not shown) in addition to a basic program such as an operation system as a computer. This recording software is software installed in the recording device 130 in advance by the rental company, and is application software necessary for requesting a content file download and recording the downloaded content file. This recording software is processed by the control unit 131 so that the above functions are exhibited. Note that the WEB address of the content distribution center 110 is recorded in the memory unit 135.

  The content distribution center 110 is a server operated by a rental company that rents content files under a contract with the copyright holder of the copyrighted work included in the data body b of the content file to be distributed. In the figure, 111 is a control unit such as a computer, 112 is a content file, and a content DB 113 is recorded in advance with a decryption key c1 necessary for decrypting the data body b of the content file attached with a content ID, 113. Is a memory unit such as a hard disk, and 114 is a communication unit for performing communication.

  The content distribution center 110 has a function of searching for and reading out the content file from the digital content DB 112 in response to a request for downloading the content file transmitted through the recording device 130 and transmitting it to the recording device 130.

  In addition to the basic program such as an operation system as a server, the memory unit 113 stores a content file delivery interrupt program (not shown). The content file delivery interrupt program is processed by the control unit 111 so that the above functions are exhibited. The memory unit 113 stores content file list data of content files recorded in the content DB 112.

  The playback device 140 is a general-purpose computer installed at the user's home or the like. In the figure, 141 is a control unit such as a CPU, 142 is an output unit such as a monitor or speaker, 143 is an operation unit such as a keyboard or mouse, 144 is a reproduction / copying unit that reads / writes data to / from the recording medium α, 145 Is a memory unit such as a hard disk, and 146 is a communication unit for performing communication.

  In addition to the basic program such as an operation system as a computer, the reproduction software shown in FIG. This reproduction software is paid or free software downloaded from the distribution management center 120 through the communication line β on the condition of user registration, and is application software necessary for reproducing the content file. In addition, the memory unit 145 transmits the WEB address information of the distribution management center 120 in which the player ID and piece data assigned to the reproduction software are stored together with the reproduction software, and is recorded. The Further, piece data transmitted from the distribution management center 120, the decryption key c2, and the like are recorded in the memory unit 144, and rental information indicating the piece data transmission date and time, the rental period, and the like is recorded.

  Although the contents of the reproduction software will be described later, the reproduction software shown in FIG. 2 is processed by the control unit 141, so that the computer functions as the reproduction device 140.

  That is, when the user inputs an application for reproducing the content file, the reproducing apparatus 140 sends the application and the provider information on the recording medium α to the distribution management unit 120 simultaneously or before and after the communication line. When the piece data is transmitted from the distribution management means 120 via the communication line according to the application, the piece data is recorded in the memory unit 145, and the header information of the content file on the recording medium α at the time of the reproduction operation This is configured to have a function of reproducing the data body of the content file using a and piece data on the memory unit.

  The distribution management center 120 is a server operated by a rental company. In the figure, 121 is a control unit such as a computer, 122 is piece data, a piece data DB in which a decryption key c2 necessary for decrypting the header information a including the piece data is recorded in advance, 123 is a user such as a user ID or a password. In addition to information being recorded in advance, user information DB in which information such as authentication and billing based on this information and operator information are sequentially recorded, 124 is a software DB in which reproduction software is recorded in advance, 125 is a hard disk, etc. A memory unit 126 is a communication unit for performing communication.

  In addition to the basic program such as an operation system as a server, the memory unit 125 includes a user registration interrupt program shown in FIG. 3, a playback software download interrupt program (not shown), and a piece data transmission interrupt shown in FIG. And the rental fee summary interruption program shown in FIG. 5 are recorded. Although the contents of these programs will be described later, the server functions as the distribution management center 120 because the program is processed by the control unit 121. The memory unit 125 stores data necessary for user registration processing and data necessary for reproduction application processing.

  A content ID indicating the corresponding content file is added to the piece data on the piece data DB 122. In this way, the correspondence between the application software on the distribution recording medium α and the piece data on the piece data DB 122 is made to match using the content ID. Similarly, the user information on the user information DB 123 is added with the user ID and player ID of the corresponding user. In this way, the correspondence between the user information in the user information DB 123 and each user is matched using the user ID or the player ID.

  The distribution management center 120 checks the user ID and password (that is, authentication) before transmitting the piece data d to the digital content playback device 120, and also checks whether or not the player IDs match. Therefore, the player ID is useful for preventing unauthorized reproduction.

  The operation of the digital content rental system 100 configured as described above will be described, and the operations of the content distribution center 110, the distribution management center 120, the recording device 130, the playback device 140, and the contents of each program will be described.

  First, the user goes to the rental company's store and operates the recording device 130 installed in the store to access the WEB address of the content distribution center 110. Then, the content distribution center 110 transmits the content file list data to the recording device 130. Thereafter, the user selects through the operation unit 133 in accordance with the content file list displayed on the output unit 132 of the recording device 130, and requests the download of the content file. Then, the application for downloading the selected content file is transmitted to the distribution management center 120.

  Upon receiving the application data, the content distribution center 110 refers to the content ID included in the content distribution center 110, searches the digital content DB 112 for the content file and the decryption key c1 corresponding to the content ID, and reads out the content file and the recording device 130. Send to. When the recording device 130 receives the content file or the like, the recording device 130 reads the provider information from the memory unit 135 and records the information on the recording medium α set in the reproduction / copy unit 134 in association with the content file. In this way, the content file is acquired. Then leave the rental company's store and return home.

  Then, the user operates the operation unit 143 of a computer at home (a computer corresponding to the reproduction device 140 and the reproduction software shown in FIG. 2 is not downloaded) to operate the distribution management center via the communication line β. 120 is accessed and a user registration request is made. In response to this request, the distribution management center 120 processes the user registration interrupt program shown in FIG. 3, and transmits data necessary for user registration to the computer (s21). Thereafter, the user inputs his / her name, address and payment conditions such as “your bank account number or credit card number” according to what the user registration screen shows through the operation unit 143 of the computer, and this registration data is sent to the communication line β. To the distribution management center 120. Then, the distribution management center 120 creates a user ID and password in response to this, and registers the user ID and the like together with the registration data as user information in the user information DB 123 (s22). It transmits to the user's computer via β (s23). Then, the process of the user registration interrupt program is terminated. The user ID and password may be entered by the user himself / herself during user registration.

  Thereafter, the user operates his / her computer to access the distribution management center 120, and inputs a request for downloading reproduction software. At this time, a user ID and a password are required. Then, the user's computer transmits the request to the distribution management center 120 through the communication line β. In response to this request, the distribution management center 120 processes the reproduction software download interrupt program, reads the reproduction software on the software DB 124, and transmits it to the user's computer via the communication line β. Then, the playback software shown in FIG. 2 is downloaded and installed in the memory unit 145 of the computer. As a result, the computer becomes the playback device 140. Note that the user-specific player ID created in the distribution management center 120 is downloaded together with the reproduction software and recorded in the memory unit 145.

  Then, the playback device 140 sets the recording medium α in the playback / copying unit 124 by the user, and when the playback software shown in FIG. 2 is executed, the playback software is displayed on the output unit 142. . Then, a playlist is displayed on the playback software screen (s1). In this playlist, the file name of the content file being rented is displayed. Then, based on this playlist, it is determined whether or not the content file has been operated for playback through the operation unit 143 (s2).

  If it is determined that the reproduction operation has not been performed, it is determined whether or not an operation for reading the recording medium α (DISC LOAD operation) has been performed through the operation unit 143 (s3). When the DISC LOAD operation is performed, the content information a2 of the content file on the recording medium α is read, and the content list indicating the content file name is displayed and output on the output unit 142 (s4).

  When the user applies for reproduction of the content file on the content list (s4), the content ID included in the content information a2 of the content file on the recording medium α is transmitted to the distribution management center 120 via the communication line β. To do. In this way, a notification that the reproduction application process is performed is transmitted. Then, the distribution management center 120 processes the piece data transmission interrupt program shown in FIG. 4, and transmits data necessary for the reproduction application process to the reproduction apparatus 140 via the communication line β (s31). Based on this data, the playback device 140 displays and outputs a playback application screen on the output unit 142 (s5).

  Thereafter, the user sequentially inputs or selects the rental period through the operation unit 143 as indicated on the reproduction application screen (this automatically determines the rental amount), and finally operates the user ID and password as a content file reproduction application. When input is made via the unit 143 (s6), the playback device 143 switches the display output of the output unit 142 to the authentication screen, and transmits the input application data to the distribution management center 120 via the communication line β. At this time, the content ID, the provider information, and the player ID on the memory unit 145 included in the content information a2 on the recording medium α are read and transmitted to the distribution management center 120 together with the application data (s7).

  Then, the distribution management center 120 confirms the authentication of the user related to the application (s32). That is, the user information of the user is read from the user information DB 123 with reference to the transmitted user ID, player ID, etc., and it is confirmed whether or not the user is a genuine user. At this time, the distribution management center 120 confirms whether or not the user information DB 123 is prepared in advance with an inappropriate person list having a predetermined amount of non-payment of rental fees, and is not a person corresponding to the inappropriate person list together with the authentication. (Note that checking the inappropriate person list is optional).

  If the distribution management center 120 confirms that the user involved in the application is an unauthorized user or a genuine user but falls under the unsuitable person list, the distribution management center 120 informs the communication line β that the user application is rejected. Then, it is transmitted to the playback device 140 (s33). Thereafter, the piece data transmission interrupt program is terminated.

  On the other hand, when it is confirmed that the user concerned with the application is a genuine user and does not correspond to the inappropriate person list, the user information on the user information DB 123 of the user is charged by referring to the user's player ID or the like. The piece data DB 122 is searched to read the piece data and the decryption key c2 corresponding to the content ID, and the user application is accepted together with the rental information included in the reproduction application data. To the playback apparatus 140 via the communication line β (s34). Thereafter, the piece data transmission interrupt program is terminated.

  Thereafter, when the playback device 140 receives a notification that the user's application is rejected via the communication line β (s8), the playback device 140 displays and outputs an error message on the output unit 142 (s9).

  On the other hand, when piece data, decryption key c2, and rental information are received via the communication line β (s8), the piece data, decryption key c2, and rental information are recorded in the memory unit 145 (s10). At the same time, the piece data transmission date and time is recorded in the memory unit 145 using the clock function of the computer. Then, the play list is updated, and the play list in which the content file name from which piece data has been acquired is described is displayed and output on the output unit 142 (s1).

  Thereafter, when the playback operation of the content file is performed based on the playlist through the operation unit 143 (s2), the playback device 140 reads the piece data and the decryption key c2 from the memory unit 145, and uses the decryption key c2 to perform piece data The reproduction information a1 is decrypted. Then, the data body b and the decryption key c1 on the recording medium α are read based on the reproduction information a1, and the data body b is reproduced while being decrypted based on the decryption key c1 (s11). Note that the reproduction software program is terminated when the user performs termination processing.

  In addition to the basic functions described above, this playback software has a piece data management function that resides in the playback device 140 and manages piece data when the playback device 140 is turned on. . In this piece data management function, while managing piece data on the memory unit 145, the difference between the piece data transmission date and time and the current date and time is obtained as an elapsed period from the time when piece data was transmitted. When the rental period included in is reached, the piece data and the decryption key c2 on the memory unit 145 are deleted because it is outside the rental period, while the content file name in the playlist is deleted.

  The distribution management center 120 processes the rental fee aggregation interrupt program shown in FIG. 5 every predetermined period, reads out the user's billing information included in the user information from the user information DB 123, and totals the total amount of billing for each user. Output (s41) On the other hand, the user's billing information and company information included in the user information is read from the user information DB 123, and the total amount of billing for each company is totaled and output (s42). The business operator charges the bank / card company 150 based on the output result or directly charges the user, and makes the user pay by transfer or convenience store. If the distribution management center 120 is connected to the bank / card company 150 via the communication line β, it is of course possible to make an immediate payment.

  In this way, in the digital content rental system 100, when a content file is downloaded from the content distribution center 110 in response to a user's request for a content file, the recording device 130 stores the business information along with the content file on the recording medium α. When recording and applying for playback of the recording medium α through the playback device 140, the playback device 140 transmits the application and the provider information on the recording medium α to the distribution management center 120, and the distribution management center 120 plays back the user. Since the total amount of billing for each business is calculated based on the billing information and business information on the memory unit 125, the business operator settles the rental fee at the store. There is no need to manage rental information for each user.Therefore, the work in the rental video business can be simplified, which is very advantageous for making the store unattended. On the other hand, when the user rents the content file, the user operates the recording device 130 installed in the store of the business operator to record the content file on the recording medium α, and operates the playback device 140 at home or the like to operate the content file. Since it is only necessary to apply for reproduction and obtain piece data of the content file, the content file can be easily rented. Moreover, even if the user's recording medium α is copied to another recording medium, the content file recorded on the other recording medium is reproduced unless piece data is obtained as a genuine user on the condition of charging. Therefore, it is possible to reliably collect charges for secondary use while preventing unauthorized use of digital content, and to secure the profits that should be originally obtained from content holders. It becomes possible to promote distribution.

  Next, a digital content rental system according to a second embodiment of the present invention will be described with reference to the drawings. 6 is a block diagram of a digital content rental system, FIG. 7 is a flowchart of playback software used in the system, FIG. 8 is a flowchart of a user registration interrupt program, and FIG. 9 is a flowchart of a piece data transmission interrupt program. FIG. 11 is a flowchart of a flowchart of a rental fee total interruption program shown in FIG. 10.

  The digital content rental system 200 shown in FIG. 6 is a server having a content DB 212 in which a content file having header information a and a data main body b is recorded in a state where a part of the data main body a is missing. The content distribution center 210 that distributes the content file via the communication line β, position information that indicates which part of the data body b is a part of the data body b that has been deleted and part of the data body b that is missing. A distribution management center 220 that has a piece data DB 222 recorded in advance and distributes a part of the data body b via the communication line β, while managing the use of a part of the data body b, etc. , While being able to communicate with the content distribution center 210, the memory unit 235 stores the content file Between the distribution management center 220 and a recording device 230 that is used to record at least a content file distributed from the content distribution center 210 to a storage medium α, which is a terminal on which information on rental business operators is recorded. And a playback device 240 that is communicable and used to play back at least the content file on the recording medium α.

  The digital content rental system 200 has substantially the same configuration as the digital content rental system 100, and the content file is recorded in the content DB 212 of the content distribution center 210 in a state where a part of the data body a is missing. It is different in point. Hereinafter, this difference will be described in detail, and the description of overlapping parts will be omitted.

  The content file here has a configuration in which a part of the data body b is omitted after the header information a and the data body b are encrypted with the decryption keys c1 and c2. The header information a includes reproduction information a1 and content information a2. In the first part of the data body b, start position information indicating the start position of the data body b is recorded. The position information indicating which part of the data body b is a part of the data body b is the data length and time from the start position information to the part of the data body b that is missing.

  In the content distribution center 210, the content file and the decryption key c1 are recorded in the content DB 212 with a content ID attached thereto.

  In the playback device 240, the playback software shown in FIG. 7 is recorded in the memory unit 245. Although the contents of the reproduction software will be described later, the reproduction software shown in FIG. 7 is processed by the control unit 241 so that the computer can function as the reproduction device 240.

  That is, when the application for reproducing the content file is input by the user, the reproducing apparatus 240 transmits the application and the provider information on the recording medium α to the distribution management center 220 via the communication line β, and the application Accordingly, when a part of the data body b and its position information are transmitted from the distribution management center 220 via the communication line β, the part of the data body b is received and recorded in the memory unit 245 and recorded. The data body b of the content file on the medium α is read and reproduced, the missing part of the data body b is recognized with reference to the position information read from the memory unit 245, and a part of the data body b on the memory unit 245 is recognized. Is read and reproduced as the data of the missing portion.

  After being encrypted in the piece data DB 222, the distribution management center 220 includes a part of the data body b lost and its position information, and the decryption key c2 necessary for decrypting the data body b as the content ID. It is recorded in the attached state. Further, in the memory unit 125 of the distribution management center 220, a user registration interruption program shown in FIG. 8, a reproduction software download interruption program (not shown), a data transmission interruption program shown in FIG. Rental fee summary interruption programs, etc. are recorded. Although the contents of these programs will be described later, the server functions as the distribution management center 220 because the program is processed by the control unit 221.

  The operation of the digital content rental system 200 configured as described above will be described, and the operations of the content distribution center 210, distribution management center 220, recording device 230, and playback device 240 and the contents of each program will be described.

  First, the user goes to the rental company's store and operates the recording device 230 installed in the store to access the WEB address of the content distribution center 210. Then, the content distribution center 210 transmits the content file list data to the recording device 230. Thereafter, the user selects through the operation unit 233 in accordance with the content file list displayed on the output unit 232 of the recording device 230, and requests the download of the content file. Then, the application for downloading the selected content file is transmitted to the distribution management center 220.

  Upon receiving the application data, the content distribution center 210 refers to the content ID included in the content distribution center 210, retrieves the content file corresponding to the content ID and the decryption key c1 from the digital content DB 212, and reads out the content file and the recording device 230. Send to. When receiving the content file or the like, the recording device 230 reads the business operator information from the memory unit 235 and records the information on the recording medium α set in the reproduction / copy unit 234 in association with the content file. In this way, the content file is acquired. Then leave the rental company's store and return home.

  Then, the user operates the operation unit 243 of a computer at home (a computer corresponding to the playback device 240 and in which the playback software shown in FIG. 7 is not downloaded), and the distribution management center via the communication line β. 220 is accessed and a user registration request is made. In response to this request, the distribution management center 220 processes the user registration interrupt program shown in FIG. 8, and transmits data necessary for user registration to the computer (s21). Thereafter, the user inputs his / her name, address and payment conditions such as “your bank account number or credit card number” according to what the user registration screen shows through the operation unit 243 of the computer, and this registration data is transferred to the communication line β. To the distribution management center 220. Then, the distribution management center 220 creates a user ID and password accordingly, and registers the user ID and the like together with the registration data as user information in the user information DB 223 (s22). It transmits to the user's computer via β (s23). Then, the process of the user registration interrupt program is terminated. The user ID and password may be entered by the user himself / herself during user registration.

  Thereafter, the user operates his / her computer to access the distribution management center 220, and inputs a request for downloading reproduction software. At this time, a user ID and a password are required. Then, the user's computer transmits the request to the distribution management center 220 through the communication line β. In response to this request, the distribution management center 220 processes the reproduction software download interrupt program, reads the reproduction software on the software DB 224, and transmits it to the user's computer via the communication line β. Then, the reproduction software shown in FIG. 7 is downloaded and installed in the memory unit 245 of the computer. As a result, the computer becomes the playback device 240. The user-specific player ID created in the distribution management center 220 is downloaded together with the reproduction software and recorded in the memory unit 245.

  Then, the playback apparatus 240 displays and outputs the playback software to the output unit 242 when the playback media shown in FIG. 7 is executed while the recording medium α is set in the playback / copy unit 224 by the user. . Then, a playlist is displayed on the playback software screen (s1). In this playlist, the file name of the content file being rented is displayed. Then, based on this playlist, it is determined whether or not the content file has been operated for reproduction through the operation unit 243 (s2).

  If it is determined that the reproduction operation has not been performed, it is determined whether or not an operation for reading the recording medium α (a DISC LOAD operation) has been performed through the operation unit 243 (s3). When the DISC LOAD operation is performed, the content file header information a is decrypted with the decryption key c1 on the recording medium α, the content information a2 included in the header information a is read, and the content file name is indicated. The list is displayed and output on the output unit 242 (s4).

  When the user makes an application for reproduction of the content file on the content list (s4), the content ID included in the content information a2 of the content file on the recording medium α is transmitted to the distribution management center 220 via the communication line β. To do. In this way, a notification that the reproduction application process is performed is transmitted. Then, the distribution management center 220 processes the data transmission interrupt program shown in FIG. 9, and transmits data necessary for the reproduction application process to the reproduction device 240 via the communication line β (s31). Based on this data, the playback device 240 displays and outputs a playback application screen on the output unit 242 (s5).

  Thereafter, the user sequentially inputs or selects rental periods through the operation unit 243 according to the reproduction application screen (this automatically determines the rental amount), and finally operates the user ID and password as a content file reproduction application. When input is performed through the unit 243 (s6), the playback device 243 switches the display output of the output unit 242 to the authentication screen, and transmits the input application data to the distribution management center 220 via the communication line β. At this time, the content ID, the provider information, and the player ID on the memory unit 245 included in the content information a2 on the recording medium α are read and transmitted to the distribution management center 220 together with the application data (s7).

  Then, the distribution management center 220 confirms the user authentication related to the application (s32). That is, the user information of the user is read from the user information DB 223 with reference to the transmitted user ID, player ID, and the like, and it is confirmed whether or not the user is a genuine user. At this time, the distribution management center 220 confirms whether or not the user information DB 223 is prepared in advance with an inappropriate person list having a predetermined amount of non-payment of rental fees, and is not a person corresponding to the inappropriate person list together with the authentication. (Note that checking the inappropriate person list is optional).

  When the distribution management center 220 confirms that the user involved in the application is an unauthorized user or a genuine user but falls under the unsuitable person list, the distribution management center 220 indicates that the user application is rejected. Then, the data is transmitted to the playback device 240 (s33). Thereafter, the data transmission interrupt program is terminated.

  On the other hand, when it is confirmed that the user concerned with the application is a genuine user and does not correspond to the inappropriate person list, the user information on the user information DB 223 of the user is charged with reference to the user's player ID or the like. Is recorded together with the provider information, while the piece data DB 222 is searched to read the data body b corresponding to the content ID, the position information and the decryption key c2, and this is read together with the rental information included in the reproduction application data. An answer to the effect of accepting the application is transmitted to the playback device 240 via the communication line β (s34). Thereafter, the data transmission interrupt program is terminated.

  Thereafter, when the playback device 240 receives a notification that the user's application is rejected via the communication line β (s8), the playback device 240 displays and outputs an error message on the output unit 242 (s9).

  On the other hand, when a part of the data body b is received via the communication line β (s8), a part of the data body b is recorded in the memory unit 245 (s10). At the same time, the data transmission date and time is recorded in the memory unit 245 using the clock function of the computer. Then, the play list is updated, and the play list in which the content file name obtained by acquiring a part of the data body b is displayed and output on the output unit 242 (s1).

  After that, when the playback operation of the content file is performed based on the playlist through the operation unit 243 (s2), the playback device 240 reads the decryption key c1 related to the content file from the memory unit 145, while reading the content from the recording medium α. The header information a related to the file is read, and the header information a is decrypted using the decryption key c1. Then, the data body b on the recording medium α is read using the reproduction information a1 included in the header information a, and the data body b is reproduced while being decrypted with the decryption key c2 on the memory unit 245 (s11). At the same time, the start position information of the data body b on the recording medium α is read, while the position information on the memory unit 245 is read, and counting of the data length and time from the start position information to the position information is started (s12). Thereafter, it is determined whether or not the counting is finished (s13). Thus, the missing portion of the data body b is recognized. As a result of the determination, when it is determined that the counting is completed and a missing portion of the data body b is recognized, a part of the data body b on the memory unit 245 is read as data of the missing portion of the data body b, and the data on the memory unit 245 is read. Playback is performed while decrypting with the decryption key c2 (s14). Thereafter, the data body b on the recording medium α is read again and decrypted with the decryption key c2 on the memory unit 245, and the subsequent reproduction is performed (s15). Note that the reproduction software program is terminated when the user performs termination processing.

  In addition to the basic functions described above, this playback software has a rental period management function that resides in the playback apparatus 240 when the playback apparatus 240 is turned on and manages the rental period of the content file. doing. In this rental period management function, while managing a part of the data body b on the memory unit 245 and its position information, etc., the difference between the transmission date and time of the part of the data body b and the current date and time is determined. a part of the data body b on the memory unit 245 as being out of the rental period when the rental period is included in the rental information. While deleting the position information and the decryption key c2, the content file name in the play list is deleted.

  The distribution management center 220 processes the rental fee aggregation interrupt program shown in FIG. 10 every predetermined period, reads out the user's charging information included in the user information from the user information DB 223, and totals the total amount of charging for each user. Output (s41) On the other hand, the user billing information and business operator information included in the user information is read from the user information DB 223, and the total amount of billing for each business operator is totaled and output (s42). The business operator charges the bank / card company 250 based on the output result or directly charges the user, and makes the user pay by transfer or convenience store. If the distribution management center 220 is connected to the bank / card company 250 via the communication line β, it is of course possible to make an immediate settlement.

  In this way, in the digital content rental system 200, when a content file is downloaded from the content distribution center 210 in response to a user's request for a content file, the recording device 230 stores the business information along with the content file on the recording medium α. When recording and applying for playback of the recording medium α through the playback device 240, the playback device 240 transmits the application and the provider information on the recording medium α to the distribution management center 220, and the distribution management center 220 plays back the user. Since the total amount of billing for each business is calculated based on the billing information on the memory unit 225 and the business information, the business operator settles the rental fee at the store. There is no need to manage rental information for each user.Therefore, the work in the rental video business can be simplified, which is very advantageous for making the store unattended. On the other hand, when the user rents the content file, the user operates the recording device 230 installed in the store of the business operator to record the content file on the recording medium α, and operates the playback device 240 at home to operate the content file. Since it is only necessary to apply for reproduction and obtain only a part of the data body b of the content file and its position information, the content file can be easily rented. Moreover, even if the user's recording medium α is copied to another recording medium α, it is recorded on the other recording medium α unless a part of the data body b is obtained as a genuine user on the condition of charging. Content files cannot be played back, making it possible to reliably collect charges from secondary use while preventing unauthorized use of digital content, and to ensure the profits that should be originally obtained by content holders, etc. In this respect, it becomes possible to promote the distribution of digital contents.

  The content distribution centers 110 and 210 can be installed in rental company stores. In this case, the content distribution centers 110 and 210 and the recording devices 130 and 230 are preferably connected via a communication line β such as a LAN line.

  Although the distribution management centers 120 and 220 have the piece data DBs 122 and 222, they can be installed in different locations. In this case, the distribution management centers 120 and 220 authenticate the user and transmit the WEB address of the piece data DBs 122 and 222 to the playback devices 140 and 240. The playback devices 140 and 240 use the piece data DB 122 based on the WEB addresses. , 222 to obtain piece data, a part of the data body b, and the like. This also applies to the playback software. Further, the reproduction software may be recorded in advance on a recording medium and distributed at a rental company store or the like. The distribution management centers 120 and 220 can arbitrarily change the setting and timing of sending piece data, a part of the data body b, and the like. In addition, in the piece data DBs 122 and 222, a part of the lost data body b and its position information are recorded. However, if the position of the data body b to be deleted is determined in advance, the position information is It is unnecessary. In this case, it is preferable to prepare in advance part of the position information of the data body b that has been lost in the reproduction software.

  Further, although the piece data DB 222 is recorded with a part of the data body b that has been deleted and the position information thereof, whether or not to include the position information is arbitrary. In this case, for example, the missing position information indicating the missing portion is recorded in advance before the missing portion of the data body b, and the data body b is reproduced and counted from the start position information to the missing position information. When this count is completed, a part of the data body b on the memory unit 245 may be reproduced as the missing portion data. Alternatively, the position of the missing part of the data body b is determined in advance, while the position information of a part of the data body b that has been deleted by the reproduction software is prepared in advance. Then, the data body b is reproduced, the missing portion of the data body b is recognized based on the position information, and a part of the data body b on the memory unit 245 is reproduced as the data of the missing portion. You can also.

  Although the content file is encrypted here, it may not be encrypted. Of course, other information can be added to the content file. As other information, a program for automatically accessing the distribution management centers 120 and 220 when it is determined whether or not the playback software is installed on the user's computer and it is determined that the software is not installed. Etc. If this program is recorded, when the user sets the recording medium α obtained in advance in his / her own computer (a computer corresponding to the playback device 140 and no playback software is downloaded), the distribution management center The web addresses 120 and 220 are read out, and based on this, the distribution management centers 120 and 220 are accessed. Thereafter, the content file on the recording medium α can be reproduced if the reproduction software is obtained by the above-described procedure. Needless to say, not only a part of the data body b but also a plurality of portions can be omitted.

  The position information is the data length and time from the start position information to a part of the data body b that is lost, but may be an address value or the like indicating the missing part. In this case, it is sequentially determined whether or not the address value of the data body b on the distribution recording medium α to be read next matches the position information. The data body b on the recording medium α shown is read, and when it is determined that they match, a part of the data body b on the memory unit 245 is read.

  Thus, the content of the software for reproduction is only an example, and any design modification may be performed as long as the same content can be realized. The same applies to the user registration interrupt program, the playback software download interrupt program, the piece data transmission interrupt program, and the data transmission interrupt program.

  The recording apparatuses 130 and 230 are assumed to be computers here, but any design modifications are possible as long as they have a function capable of communicating with the content distribution centers 110 and 210 and writing to the recording medium. It doesn't matter. For example, a vending machine that can communicate with the content distribution centers 110 and 210 can be used. It goes without saying that the rental company's store can use not only a dedicated store but also a net cafe and use the computer of the net cafe as a recording device.

  The playback devices 140 and 240 are also computers here, but may be dedicated playback devices.

  Here, the rental system has been described, but the present invention is not limited to this, and the design can be changed as a digital content distribution system that transfers content files to users for a fee or free of charge. The reproduction software used in this case only needs to delete a series of processes corresponding to the rental period.

1 is a configuration diagram of a digital content rental system according to a first embodiment. FIG. It is a flowchart of the software for reproduction | regeneration used for the system. It is a flowchart of a user registration interruption program. It is a flowchart of the interruption program for piece data transmission. It is a flowchart of the flowchart of a rental charge total interruption program. It is a block diagram of the rental system of the digital content which concerns on 2nd Embodiment. It is a flowchart of the software for reproduction | regeneration used for the system. It is a flowchart of a user registration interruption program. It is a flowchart of the interruption program for data transmission. It is a flowchart of the flowchart of a rental charge total interruption program.

Explanation of symbols

100, 200 Digital content rental system 110, 210 Content distribution center 120, 220 Distribution management center 130, 230 Recording device 140, 240 Playback device

Claims (15)

Content distribution means for distributing a content file via a communication line, which is a server having a database in which a content file having header information and a data main body is recorded in advance in a state where reproduction information included in the header information is lost And a server having a database in which reproduction information included in the missing header information is recorded in advance, and distributing the reproduction information as piece data via a communication line, while managing the use of the piece data And the content distribution means, and a terminal in which the information on the rental of the content file to the user is recorded in the memory unit, and at least the content file distributed from the content distribution means A recording device used for recording on a storage medium; The and content file on the recording medium can communicate with the management unit; and a reproducing apparatus used to at least play,
When a request for downloading a content file is input to the recording device by the user, the recording device transmits the request to the content distribution unit via the communication line, and the content distribution unit transmits the content file and the company information related to the request. Transmitted to the recording device, the recording device is to record the carrier information on the memory unit together with the content file on the recording medium,
After that, when an application for playing a content file on the condition of charging is input by the user to the playback device, the playback device sends the application and the provider information on the recording medium at the same time or before and after the communication line. The distribution management means receives the application etc. at the same time or before and after that, and records the billing information and the company information related to the application in the memory unit, while the content file related to the application The piece data is transmitted to the playback device via the communication line, and the playback device plays back the data body of the content file using the header information and the piece data of the content file of the recording medium during the playback operation.
Thereafter, the distribution management means is configured to count the total amount of billing for each business based on billing information and business information.   2. The recording apparatus used in the digital content rental system according to claim 1, wherein business information is recorded in the memory unit, and when a request for downloading a content file is input to the recording apparatus by a user, the request is communicated. When the content file is transmitted from the content distribution unit via the communication line in response to the request, the content file and the operator information on the memory unit are recorded on the recording medium. Apparatus for use in a digital content rental system, characterized by having a function of   In the playback apparatus used in the digital content rental system according to claim 1, when an application for playback of a content file is input by a user, the application and business information on a recording medium are simultaneously or via a communication line. When the piece data is transmitted from the distribution management unit via the communication line in response to the application, the piece data is recorded in the memory unit and is recorded on the recording medium during the reproduction operation. A playback device used in a digital content rental system, having a function of playing back the data body of the content file using header information of the content file and piece data on the memory unit .   The recording apparatus of the digital content rental system according to claim 1 is a computer, and is software processed by the computer. When a request for downloading a content file is input by the user to the recording apparatus, the request is communicated. When the content file is transmitted from the content distribution unit via the communication line in response to the request, the content file and the operator information on the memory unit are recorded on the recording medium. Recording software for use in a digital content rental system characterized by   The reproduction apparatus of the digital content rental system according to claim 1 is a computer, and is software processed by the computer. When an application for reproduction of a content file is input by a user, the application and the recording medium are recorded on the recording medium. The company information is transmitted to the distribution management means simultaneously or sequentially via the communication line, and when piece data is transmitted from the distribution management means via the communication line in response to the application, the piece data is stored in the memory. A digital content that is recorded in a section and is played back using the header information of the content file on the recording medium and the piece data on the memory section during a playback operation. Reproduction software used in rental systems. A content distribution unit that distributes the content file via a communication line in a server having a database in which the content file having the header information and the data main body is recorded in a state where a part of the data main body is missing; A server having a database in which position information indicating a part of the data body that has been deleted and a part of the data body that is a part of the data body is recorded in advance. A business for renting a content file to a user in a memory unit while being able to communicate between a distribution management unit that manages the use of a part of the data body and the content distribution unit Storage device that stores at least a content file distributed from content distribution means, which is a terminal in which person information is recorded Comprising a recording device used to record, and a reproduction device that is used to at least reproduce and content file on the recording medium is capable of communication with the delivery management means,
When a request for downloading a content file is input to the recording device by the user, the recording device transmits the request to the content distribution unit via the communication line, and the content distribution unit transmits the content file and the company information related to the request. Transmitted to the recording device, the recording device is to record the carrier information on the memory unit together with the content file on the recording medium,
After that, when an application for playing a content file on the condition of charging is input by the user to the playback device, the playback device sends the application and the provider information on the recording medium at the same time or before and after the communication line. The distribution management means receives the application etc. at the same time or before and after that, and records the billing information and the company information related to the application in the memory unit, while the content file related to the application A part of the data body and the position information thereof are transmitted to the playback device simultaneously or sequentially after the communication line, and the playback device receives a part of the data body or the like simultaneously or before and after that to the memory unit. Record, read and play back the data body of the content file on the recording medium, and recognize the missing part of the data body by referring to the position information read from the memory Is adapted to reading and reproducing a part of the data body in the memory unit as data of the omitted part,
Thereafter, the distribution management means is configured to count the total amount of billing for each business based on billing information and business information.   7. The recording apparatus used in the digital content rental system according to claim 6, wherein business information is recorded in the memory unit, and when a request for downloading a content file is input to the recording apparatus by a user, the request is communicated. When the content file is transmitted from the content distribution unit via the communication line in response to the request, the content file and the operator information on the memory unit are recorded on the recording medium. Apparatus for use in a digital content rental system, characterized by having a function of   In the playback apparatus used in the digital content rental system according to claim 6, when an application for playback of a content file is input by a user, the application and business information on a recording medium are simultaneously or via a communication line. When a part of the data body and its position information are transmitted from the distribution management means at the same time or before and after the communication line in response to the application, A part or the like is received at the same time or before and after being recorded in the memory unit, the data body of the content file on the recording medium is read and reproduced, and the position of the data body is read with reference to the position information read from the memory unit It has a function to recognize the missing part and to read and reproduce a part of the data body on the memory part as the data of the missing part. Reproducing apparatus for use in the rental system of the digital content, wherein the door.   7. The digital content rental system recording apparatus according to claim 6 is a computer, and is software processed by the computer. When a request for downloading a content file is input by the user to the recording apparatus, the request is communicated. When the content file is transmitted from the content distribution unit via the communication line in response to the request, the content file and the operator information on the memory unit are recorded on the recording medium. Recording software for use in a digital content rental system characterized by   The reproduction apparatus of the digital content rental system according to claim 6 is a computer, and is software processed by the computer. When an application for reproduction of a content file is input by a user, the application and the recording medium are recorded on the recording medium. The company information is transmitted to the distribution management means simultaneously or sequentially via the communication line, and a part of the data body and its position information are simultaneously or phased via the communication line from the distribution management means according to the application. When transmitted before and after, a part of the data body is received simultaneously or sequentially and recorded in the memory unit, and the data body of the content file on the recording medium is read and reproduced, and from the memory unit Referring to the read position information, the missing part of the data body is recognized, and a part of the data body on the memory part is deleted. Reproduction software for use in the rental system of the digital content, characterized in that that is a content to be reproduced is read out as data.   7. The digital content rental system according to claim 1 or 6, wherein the playback device obtains an elapsed period from the time when the piece data or part of the data body transmitted from the distribution management means is received, and the elapsed period is A digital content rental system having a function of deleting a piece of transmitted piece data or a part of a data body when a predetermined period is reached.   The playback apparatus used in the digital content rental system according to claim 3 or 8, wherein an elapsed period from the time when the piece data transmitted from the distribution management means or a part of the data body is received is obtained, and the elapsed period A playback device used in a digital content rental system, which has a function of deleting a piece of transmitted piece data or a part of a data body when a predetermined period is reached. The playback software used in the digital content rental system according to claim 5 or 9, wherein an elapsed period is obtained from the time when piece data or a part of the data body transmitted from the distribution management means is received, and the elapsed period When the program reaches a predetermined period, content for deleting the transmitted piece data or a part of the data body is added to the reproduction software used in the digital content rental system.   9. The digital content rental system according to claim 1 or 6, wherein the playback device according to claim 3 or 8 is a computer, can communicate with the playback device via a communication line, and is played back according to claim 5 or 9. When the user inputs a request for downloading the playback software to the playback device, the playback device sends the request to the software via a communication line. The software is distributed to the distribution means, the software distribution means transmits the reproduction software according to the request to the reproduction device via the communication line, and the reproduction device installs the reproduction software. Digital content rental system.   15. The digital content rental system according to claim 14, wherein the software distribution unit is provided integrally with a content distribution unit or a distribution management unit.

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