JP2009087108A - Content delivery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To utilize contents purchased by a mobile terminal, as contents of higher quality in another terminal such as a personal computer while maintaining a conventional mobile terminal copyright protection system. <P>SOLUTION: The mobile terminal is connected to high reproducing equipment such as a personal computer terminal connected to a broadband. The personal computer terminal thereby acquires information on copyright contents purchased by the mobile terminal, and the information is transferred to a content delivery server through the broadband. The content delivery server selects high quality content from a source of the transferred information and delivers it to the personal computer terminal for reproduction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a content distribution system that allows a copyrighted content purchased on a portable terminal to be stored and used on the portable terminal, and at the same time, allows a higher quality content to be used on a PC terminal that can use a broadband network.

  Currently, there are increasing examples of downloading various contents such as music, images, videos, games, comics, etc. on a network and using them on a mobile terminal such as a mobile phone or PDA. Among them, there are many copyrighted contents, and movement to other storage areas is restricted.

  In the conventional technology, when content downloaded by a mobile terminal is to be used on a PC terminal, there is a problem that even if the user is the same user, the copyrighted content cannot be reproduced even if it is moved to the PC terminal. Furthermore, since the content for mobile terminals downloaded with restrictions on the capacity of the mobile terminal and the communication speed of the wireless network has a small display size and low resolution, even if it can be moved to the PC terminal, it cannot be satisfactorily viewed.

  When viewing the same content on a PC terminal that can download high-capacity and high-quality data via a broadband network with a high communication speed, the content for the PC terminal must be repurchased, which impairs user convenience. End up.

JP 2005-141925 A JP 2003-303137 A

  In the conventional technology, an account and a password are used as an authentication means, and the purchased content can be downloaded without specifying the medium by inputting the account and password and authenticating to the content distribution server. Could be used.

  Therefore, there is a problem that it is difficult to protect the copyright, because the copyright must be protected, illegal copying of contents such as photographs and images can be freely performed.

  In addition, in the content distribution system for mobile terminals to protect copyrights, the use terminal is restricted, not whether or not the purchaser uses it. Convenience of using content has deteriorated for those users.

  The present invention makes it possible to use content purchased on a mobile terminal on other terminals such as a PC while maintaining a conventional mobile terminal copyright protection system, and further, a high-processing function CPU of a PC terminal, a large screen, The purpose is to provide high-quality content with higher resolution than mobile terminal content, taking advantage of features such as high-speed communication.

In order to achieve the above object, a content distribution system as shown in FIG. 1 of the present invention is provided. The content distribution system
A mobile device that can use a wireless network,
PC terminal that can use broadband network,
A content distribution server that distributes content to the portable terminal and the PC terminal is connected to each other so that they can communicate with each other.

  The invention according to claim 1 of the present invention is a method for determining distribution content, wherein content ID information stored in a mobile terminal is acquired by connecting a PC terminal to the mobile terminal, The content distribution server transmits the content to the content distribution server, and the content distribution server selects the content that is higher in quality than the content of the portable terminal as the distribution content for the PC terminal.

  The invention according to claim 2 of the present invention is a method for extracting a continuation portion of the distribution content that has been viewed, wherein the content distribution server uses the content usage information acquired from the portable terminal for the selected distribution content. And extracting a portion to be viewed marked on the portable terminal.

  The invention according to claim 3 of the present invention is a method for encryption and decryption, wherein the decryption key generated by encrypting the content selected from the method according to claim 1 or 2 is a wireless network. The encrypted content transmitted to the mobile terminal via the broadband is distributed to the PC terminal via the broadband network, and the PC terminal obtains the decryption key from the mobile terminal and the encrypted content transmitted from the content distribution server. The content is decrypted and reproduced.

  The invention according to claim 4 of the present invention is a content distribution interruption handling method that monitors that a mobile terminal is always connected to a PC terminal, and saves it in the PC terminal when the connection is disconnected The content and the decryption key that have been deleted are deleted.

  The invention according to claim 5 of the present invention is a content distribution end method, wherein the PC terminal receives a content distribution end message from the content distribution server, and deletes the content and the decryption key stored in the PC terminal. It is characterized by.

The content distribution server that identifies the network and receiving terminal and distributes various contents
(A) An authentication unit that acquires user authentication information, mobile terminal authentication information, and content ID information from a PC terminal, and performs authentication verification;
(B) a content determination unit that acquires content ID information and content usage information, determines content to be distributed to the PC terminal, and outputs a determination result list to the PC terminal;
(C) a content distribution unit that performs extraction control on the content selected by the user from the distribution content storage unit, encrypts the content, and distributes and controls the content to the PC terminal;
(D) a distribution content storage unit for storing distribution content;
(E) a user authentication table for storing the user authentication information, the mobile terminal authentication information, and the content ID information;
(F) a communication interface connected to the network;
(G) a CPU having processing and calculation functions;
Is provided.

PC terminals that receive and use higher-quality content via broadband
(A) An authentication information transmitting unit that acquires user authentication information, mobile terminal authentication information, and content ID information from a mobile terminal for authentication verification with the content distribution server, and transmits the acquired information to the content distribution server via a broadband network;
(B) a determination information transmitting unit that acquires content usage information from the mobile terminal to extract a portion of the content that has been viewed by the content distribution server, and transmits the content usage information to the content distribution server via a broadband network;
(C) a content receiving unit that is transmitted from the content distribution server, temporarily stores encrypted content, obtains a decryption key from the mobile terminal, and decrypts and plays back the encrypted content;
(D) Monitors the status of connection with the portable terminal, and immediately transmits a content distribution stop request message to the content distribution server when the connection is disconnected, and deletes a content deletion message and decryption processing unit to the content storage unit A connection monitoring unit that transmits a decryption key deletion message to
(E) an external interface connected to the mobile terminal;
(F) a communication interface for connecting to broadband;
(G) a CPU having processing and calculation functions;
Is provided.

Mobile devices that purchase, download, and use compressed content over a wireless network
(A) a content storage unit for storing purchased and downloaded content;
(B) a decryption key storage unit for storing the decryption key transmitted from the content distribution server;
(C) a content use information storage unit for storing the marked information when using the content;
(D) an external interface connected to the PC terminal;
(E) a communication interface for connecting to a wireless network;
(F) a CPU having processing and calculation functions;
Is provided.

  The present invention makes it possible to use content purchased on a mobile terminal on a PC terminal by using functions such as discrimination, control, and encryption on the content of the content distribution server, and moreover, a larger screen and higher quality content than the content of the mobile terminal. It is possible to provide a high-quality content using a PC terminal in a broadband environment such as an Internet cafe for a user who can only provide the mobile terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings referred to in the following description, the same components are denoted by the same reference numerals.

FIG. 1 is a configuration diagram showing a content distribution system according to an embodiment of the present invention.
The content distribution system 1 is a content distribution server that can communicate with the mobile terminal 200 and the PC terminal 300 via the mobile terminal 200 and the PC terminal 300 and the network 400 that are connected to the communication cable 500 and can communicate with each other. 100 is included.

  The content distribution server 100 includes a memory 110, a distribution content storage unit 140, a CPU 150, a communication interface 160, and a user authentication table 170.

  The memory 110 includes an authentication unit 111 that determines whether or not a user is permitted to use content, a content determination unit 120 that determines which content is to be distributed from which part, and extraction, encryption, and distribution of distribution content. A content distribution unit 130 for controlling the content.

  The content determination unit 120 includes an information acquisition unit 121 that acquires the content ID 440 and content usage information 700 necessary for determination, a determination unit 122 that determines which content is to be distributed from which part, and the determination result as the PC terminal 300. And a result display portion 123 to be displayed.

  The content distribution unit 130 includes an extraction processing unit 131 that extracts a portion of the selected content that the user wants to view from the distribution content storage unit 140, an encryption processing unit 132 that encrypts the extracted content, and the encrypted content. A distribution processing unit 133 for distributing to the PC terminal 300;

  The user authentication table 170 has a customer name 410, a mobile number 420, a serial number 430, and a content ID 440, which are authentication information shown in FIG.

  The portable terminal 200 includes a wireless communication interface 210, a memory 220, a CPU 230, and an external interface 240.

  In the memory 220, the content storage unit 221 that stores the content purchased from the content distribution server 100 and the content ID 440 via the network 400 and the wireless interface 210, and the content distribution server 100 via the network 400 and the wireless interface 210 are stored. A decryption key storage unit 222 that stores a decryption key transmitted from a certain distribution processing unit 133, and a content use information storage unit 223 that records and stores information marked as a part of viewing content on the mobile terminal 200.

  The PC terminal 300 includes a communication interface 310, a memory 320, a CPU 330, and an external interface 340.

  In the memory 320, the mobile number 420, the serial number 430, and the content ID 440 in the content storage unit 221 of the mobile terminal 200 are acquired from the mobile terminal 200 via the external interface 340 and the communication cable 500, and the communication interface 310 and the network The content usage information 700 is acquired from the content usage information storage unit 223 of the portable terminal 200 via the authentication information transmission unit 321 that transmits to the content distribution server 100 via 400, the external interface 340, and the communication cable 500, and the communication interface 310 A determination information transmission unit 322 that transmits to the content distribution server 100 via the network 400, and a content reception unit 323 that receives and reproduces the content transmitted from the content distribution server 100, Having an external interface 340 and the connection monitoring section 326 that monitors the connection status of the external interface 240 of the mobile terminal 200.

  The content receiving unit 323 obtains a decryption key from the temporary storage unit 325 that temporarily stores the content sent from the content distribution server 100 and the decryption key storage unit 222 of the mobile terminal 200, and decrypts the content stored in the temporary storage unit 325. And a decoding processing unit 324 for reproducing the data.

  FIG. 2 is a sequence diagram showing a content distribution method according to an embodiment of the present invention.

  The external interface 240 of the mobile terminal 200 is connected to the external interface 340 of the PC terminal 300 via the communication cable 500 [S101], and the CPU 330 of the PC terminal 300 activates the authentication information transmission unit 321 and the connection monitoring unit 326 on the memory 320. [S102] The authentication information transmission unit 321 performs user authentication of the mobile number 420, the serial number 430, and the content ID 440 of the content stored in the content storage unit 221 in the mobile terminal 200 via the external interface 340 and the communication cable 500. Request data [S103].

  User authentication data (mobile number 420, serial number 430, content ID 440) [S104] is transmitted from portable terminal 200, and authentication information transmission unit 321 transmits the information to content distribution server 100 via communication interface 310 and network 400. [S105].

  The CPU 150 of the content distribution server 100 executes the authentication unit 111 on the memory 110 and collates the user authentication data of the mobile number 420, the serial number 430, and the content ID 440 with the information in the user authentication table 170 [S106], and does not match In this case, an authentication error message is transmitted to the PC terminal 300 [S107], and the CPU 330 of the PC terminal 300 abnormally terminates the authentication information transmission unit 321 [S108].

  If they match, the CPU 150 of the content distribution server 100 executes the content determination unit 120 on the memory 110, performs the content determination process [S109] shown in FIG. 4, and transmits the determination result list shown in FIG. [S110], display, and confirm the user.

  A content request message [S112] is transmitted from the PC terminal 300 to the extraction processing unit 131 of the content distribution server 100 according to a user instruction or the like [S111], and the extraction processing unit 131 extracts the content requested by the user from the distribution content storage unit 140. [S113] Then, the encryption processing unit 132 performs encryption processing to generate a decryption key [S114].

  In the distribution process [S115], the distribution processing unit 133 is executed by the CPU 150, and the decryption key is transmitted from the distribution processing unit 133 to the portable terminal 200 via the network 400 and the wireless interface 210 [S116]. The content stored in the storage unit 222 [S117] and encrypted content is distributed from the distribution processing unit 133 to the PC terminal 300 via the network 400 [S118] and stored in the temporary storage unit 325 of the PC terminal 300 [S119]. ].

  In the PC terminal 300, the CPU 330 executes the decryption processing unit 324 [S120], issues a request for a decryption key to the mobile terminal 200 via the external interface 340 connected to the external interface 240 of the mobile terminal 200 [S121], The decryption key is obtained from the decryption key storage unit 222 in the portable terminal 200 [S122], the encrypted content in the temporary storage unit 325 is decrypted, and the content can be used [S123].

  When the distribution process ends normally, a distribution normal end message is transmitted from the distribution processing unit 133 of the content distribution server 100 to the PC terminal 300 [S124], and the CPU 330 of the PC terminal 300 simultaneously deletes the decryption key by the decryption processing unit 324. The content stored by the temporary storage unit 325 is deleted [S125], and the content reception unit 323 is normally terminated [S126].

  FIG. 3 is a sequence diagram showing a content distribution abnormality interruption handling method according to an embodiment of the present invention.

  The CPU 330 of the PC terminal 300 executes the connection monitoring unit 326 [S201], and always monitors the connection status between the external interface 340 and the external interface 240 of the portable terminal 200 while delivering from the content delivery server 100 [S202]. It is determined whether or not the connection is disconnected [S203].

  If not disconnected, content is continuously received [S204], and if disconnected, a content distribution stop request message is immediately transmitted to the content distribution server 100 [S205]. At the same time, a decryption key is received from the decryption processing unit 324. The content is deleted and the content is deleted from the temporary storage unit 325 [S206].

  The distribution processing unit 133 of the content distribution server 100 receives the content distribution stop request message [S205] from the PC terminal 300, performs distribution stop control [S207], and transmits a content distribution stop message to the PC terminal 300 [S208]. Stop delivery.

  When the PC terminal 300 receives the content distribution stop message, the CPU 330 of the PC terminal 300 executes the connection monitoring unit 326, confirms that the decryption key and the content have been deleted, and ends abnormally [S209].

  FIG. 4 is a flowchart showing a content determination method according to an embodiment of the present invention.

  The CPU 150 of the content distribution server 100 causes the content determination unit 120 to execute, and the information acquisition unit 121 of the content determination unit 120 acquires the content ID 440 from the authentication unit 111 [S301] and uses the determination information transmission unit 322 of the PC terminal 300. Then, the content usage information 700 as shown in FIG. 5 is acquired from the portable terminal 200 [S302].

  The determination unit 122 compares the acquired content ID 440 with the information of the distribution content storage unit 140 [S303], and if there is no higher quality content than the content of the mobile terminal 200, the content determination unit 120 is terminated.

  If it exists, it is determined whether the flag 704 of the content usage information 700 is 1 or 0 [S304]. If the flag 704 of the content usage information 700 is “0”, the content selected in [S303] is displayed in the determination result list. Output.

  When the flag 704 of the content usage information 700 is “1”, the content viewing start time 702 and the end time 703 are extracted from the content usage information 700 and determined together with information about the content selected in [S305] and [S303]. The result is output to the result list, and finally, the determination result list 800 as shown in FIG. 6 is displayed on the PC terminal 300 [S306].

  FIG. 5 is a configuration diagram showing content usage information according to an embodiment of the present invention.

  The content usage information 700 identifies a content ID 701 that identifies content, a start time 702 that identifies a marked content start time, an end time 703 that identifies a marked content end time, and whether or not it is marked. And a flag 704 to be used.

  FIG. 6 is a configuration diagram showing a content determination result list according to an embodiment of the present invention.

  The determination result list 800 includes a type 801 indicating a content type, a title 802 indicating a title, a start time 803 indicating a marked content distribution start time, and an end time 804 indicating a marked content distribution end time. Have

  FIG. 7 is a configuration diagram showing a user authentication table according to an embodiment of the present invention.

  The user authentication table 170 has a customer name 410, a mobile number 420, a serial number 430, and a content ID 440.

It is a block diagram which shows the content delivery system of one Example of this invention. It is a sequence diagram which shows the content delivery method of one Example of this invention. It is a sequence diagram which shows the content delivery abnormal interruption response method of one Example of this invention. It is a flowchart figure which shows the content determination method of one Example of this invention. It is a block diagram which shows the content usage information of one Example of this invention. It is a block diagram which shows the content determination result list of one Example of this invention. It is a block diagram which shows the user authentication table of one Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Content delivery system, 100 ... Content delivery server, 110 ... Memory, 111 ... Authentication part, 120 ... Content determination part, 121 ... Information acquisition part, 123 ... Result display part, 130 ... Content delivery part, 131 ... Extraction processing part 132, encryption processing unit, 133, distribution processing unit, 140 ... distribution content storage unit, 150 ... CPU, 160 ... communication interface, 170 ... user authentication table, 200 ... mobile terminal, 210 ... wireless communication interface, 220 ... memory, 221 ... Content storage unit, 222 ... Decryption key storage unit, 223 ... Content usage information storage unit, 230 ... CPU, 240 ... External interface, 300 ... PC terminal, 310 ... Communication interface, 320 ... Memory, 321 ... Authentication information transmission unit 322... Judgment information transmission unit 323. Ntsu receiving unit, 324 ... decoding unit, 325 ... temporary storage unit, 326 ... connection monitoring unit, 330 ... CPU, 340 ... external interface, 400 ... network, 500 ... communication cable.

Claims (5)

A mobile device,
A PC terminal,
A content distribution server for distributing content used in each of the mobile terminal and the PC terminal;
Is a content distribution system that can be connected to each other,
When the PC terminal downloads content from the previous term content distribution server, the previous term PC terminal connects to the mobile terminal, acquires the content ID information stored in the mobile terminal, and acquires it via a high-speed broadband network. The content ID information is transmitted to the content distribution server, compared with content owned by the content distribution server, and if there is content such as a higher quality moving image, it is distributed to the PC terminal, Content distribution system. The system of claim 1, wherein
If you want to watch a continuation of viewing on a mobile device on a PC device,
Marking the part where the content is viewed on the mobile terminal, storing the marked information in the mobile terminal as content usage information, and the content usage information together with the content ID information when the mobile terminal is connected to the PC terminal Content determination and use, wherein the content distribution server transmits the high-quality content after the marked portion to the PC terminal. Method. The system of claims 1 and 2,
The content distribution server encrypts the content to be distributed to the PC terminal, generates a decryption key, transmits the encrypted content to the PC terminal via the broadband network, and transmits the decryption key to the mobile terminal via the wireless network. And
A content encryption / decryption method, wherein the PC terminal obtains the decryption key from the mobile terminal, decrypts the encrypted content based on the decryption key, and enables playback. The system of claim 1, wherein
When the connection between the PC terminal and the portable terminal is disconnected while the content is distributed from the content distribution server to the PC terminal, the PC terminal transmits a content distribution stop message to the content distribution server, and the PC terminal A content distribution interruption handling method comprising means for deleting stored content and a decryption key. The system of claim 1, wherein
When content distribution from the content distribution server to the PC terminal is completed, the PC terminal has a means for receiving a content distribution end message from the content distribution server and deleting the content and the decryption key stored in the PC terminal A content distribution end method characterized by the above.

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