JP2018147323A - Content sharing system, network storage device, electronic device, content sharing method, operation program for network storage device, operation program for electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a content sharing system allowing a plurality of persons to share content data without worrying about a communication traffic in a communication network which is limited in communication traffic.SOLUTION: A content sharing system 100 includes a first NAS 2A, a first electronic device 1A, a second NAS 2B, and a second electronic device 1B. The first NAS 2A stores content data received from the first electronic device 1A in a storage area allocated to a user of the first electronic device 1A, generates link information for accessing the stored content data, and transmits the link information to the first electronic device 1A. The second electronic device 1B acquires the link information received by the first electronic device 1A from the first NAS 2A and transmits the link information to the second NAS 2B. The second NAS 2B acquires the content data from the first NAS 2A based on the link information received from the second electronic device 1B and stores it in a storage area allocated to a user of the second electronic device 1B.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a content sharing system, a network storage device, an electronic device, a content sharing method, an operation program for a network storage device, and an operation program for an electronic device.

  With the spread of smartphones, content data such as still image files or moving image files generated by smartphones is shared by a plurality of users.

  The content data sharing method includes a method of using e-mail, a method of using a messenger application provided by a social networking service, or a URL (Uniform Resource Locator) of content data stored by a cloud storage service. There are methods to notify.

  In Patent Document 1, when content data is shared with other users by using a message service that can attach content data such as MMS (Multimedia Messaging Service) or SMS (Short Messages Service), the content data is suitable for transmission. Resizing to capacity is disclosed.

Special table 2010-528508

  In the above-described method using electronic mail, when the content data has a large capacity, the amount of communication between smartphones using the mobile communication network increases. For this reason, a communication cost becomes high, and transmission of content data takes time.

  In order to reduce the amount of communication, as described in Patent Document 1, it is conceivable to reduce the content data capacity by compression or the like and then send it attached to an e-mail. However, with this method, original size content data cannot be shared by multiple users.

  In the method using the messenger application described above, the capacity of content data is reduced by compression processing or the like on the messenger application side in order to reduce the load on the server.

  For this reason, it is possible to reduce communication costs and shorten the transmission time of content data. However, with this method, original size content data cannot be shared by multiple users.

  In the method using the URL issued from the cloud storage service, the smartphone accessing the URL downloads the original size content data from the cloud storage service via the mobile communication network.

  For this reason, although the original size content data can be shared among a plurality of users, the problem that the communication amount of the mobile communication network increases cannot be solved.

  The present invention has been made in view of the above circumstances, and a content sharing system and network capable of sharing content data among a plurality of people without worrying about the communication amount in a communication network in which the communication amount is limited. It is an object to provide a storage device, an electronic device, a content sharing method, an operation program for a network storage device, and an operation program for an electronic device.

  The content sharing system of the present invention includes a first network storage device, a first electronic device connected to the first network storage device, a second network storage device, and a second network device connected to the second network storage device. An electronic device, wherein the first network storage device receives a content data from the first electronic device, a storage control unit that stores the content data in a storage area, A link information generation unit that generates link information for accessing content data stored in the storage area; and a transmission unit that transmits the link information to the first electronic device. The link received by the first electronic device from the first network storage device A data acquisition unit for acquiring data including information, and a transmission unit for transmitting the link information to the second network storage device, wherein the second network storage device receives the link received from the second electronic device. Based on the information, the first network storage device is accessed to acquire the content data from the first network storage device, and the content data acquired by the content data acquisition unit is stored in the storage area. And a storage control unit for storing.

  The network storage device of the present invention is a network storage device connected to an electronic device, transmitted from the first electronic device connected to the first network storage device to the first network storage device, and the first A data receiving unit that receives data including link information for accessing content data stored in a storage area of the network storage device from the electronic device, and accesses the first network storage device based on the link information. A content data acquisition unit that acquires the content data from the first network storage device; and a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area.

  An electronic device of the present invention is an electronic device connected to a second network storage device, transmitted from the first electronic device connected to the first network storage device to the first network storage device, and the first A data acquisition unit for acquiring data including link information for accessing content data stored in a storage area by one network storage device, and transmitting at least the link information of the data to the second network storage device The second network storage device obtains the content data from the first network storage device by accessing the first network storage device based on the link information received from the electronic device. And the content data It is for storing in the storage area.

  An electronic apparatus according to the present invention is an electronic apparatus connected to a first network storage device, wherein the transmission unit transmits content data stored in a storage medium to the first network storage device, and the first network storage A link information acquisition unit that acquires link information for accessing the content data stored in the storage area by the device from the first network storage device, and metadata of the content data stored in the storage medium And a metadata editing unit that stores link information.

  A network storage device of the present invention is a network storage device connected to a first electronic device, and a receiving unit that receives content data stored in a storage medium of the first electronic device from the first electronic device; A storage control unit that stores the content data in a storage area; a link information generation unit that generates link information for accessing the content data stored in the storage area; and an encryption unit that encrypts the link information; A transmission unit that transmits the encrypted link information to the first electronic device, and the encrypted link information is stored in the metadata of the content data by the first electronic device. Is.

  The content sharing method of the present invention includes a first network storage device, a first electronic device connected to the first network storage device, a second network storage device, and a second network device connected to the second network storage device. A content sharing method using an electronic device, wherein the first network storage device receives content data from the first electronic device, stores the content data in a storage area, and stores the content data in the storage area Link information for accessing content data is generated, the link information is transmitted to the first electronic device, and the second electronic device receives the link received by the first electronic device from the first network storage device. Information and send the link information to the second network storage device. And the second network storage device accesses the first network storage device based on the link information received from the second electronic device, and acquires the content data from the first network storage device. The content data is stored in a storage area.

  The network storage device operating program of the present invention is transmitted to the first network storage device from the first electronic device connected to the first network storage device to the network storage device connected to the electronic device, and the first A data receiving step for receiving data including link information for accessing content data stored in a storage area by a network storage device from the electronic device; and accessing the first network storage device based on the link information A content data acquisition step of acquiring the content data from the first network storage device, and a storage control step of storing the content data acquired by the content data acquisition step in a storage area; It is intended to execute.

  The electronic device operating program of the present invention is transmitted to the first network storage device from the first electronic device connected to the first network storage device to the electronic device connected to the second network storage device, and A data acquisition step for acquiring link information for accessing content data stored in a storage area by the first network storage device; and a transmission step for transmitting the link information to the second network storage device. The second network storage device acquires the content data from the first network storage device by accessing the first network storage device based on the link information received from the electronic device, The container It is for storing a Tsudeta in the storage area.

  An electronic device operating program according to the present invention includes: a transmission step of transmitting content data stored in a storage medium to the first network storage device to an electronic device connected to the first network storage device; A link information acquisition step for acquiring link information for accessing the content data stored in the storage area by the storage device from the first network storage device; and metadata of the content data stored in the storage medium. And a metadata editing step for storing the link information.

  An operation program for a network storage device according to the present invention is a reception step of receiving content data stored in a storage medium of the first electronic device from the first electronic device in a network storage device connected to the first electronic device. A storage control step for storing the content data in a storage area, a link information generation step for generating link information for accessing the content data stored in the storage area, and an encryption step for encrypting the link information And a transmission step of transmitting the encrypted link information to the first electronic device, wherein the encrypted link information is stored in the content data by the first electronic device. Stored in the metadata.

  According to the present invention, a content sharing system, a network storage device, an electronic device, and a content sharing method can share content data among a plurality of people without worrying about the communication amount in a communication network in which the communication amount is limited. The network storage device operation program and the electronic device operation program can be provided.

1 is a diagram showing a schematic configuration of a content sharing system 100 according to a first embodiment of the present invention. It is a figure which shows the internal hardware structural example of 1 A of 1st electronic devices in the content sharing system 100 shown in FIG. It is a figure which shows the internal hardware structural example of the 2nd electronic device 1B in the content sharing system 100 shown in FIG. It is a figure which shows the internal hardware structural example of 1st NAS2A in the content sharing system 100 shown in FIG. It is a figure which shows the internal hardware structural example of 2nd NAS2B in the content sharing system 100 shown in FIG. FIG. 5 is a functional block diagram of a first NAS 2A shown in FIG. It is a functional block diagram of 1 A of 1st electronic devices shown in FIG. It is a functional block diagram of the 2nd electronic device 1B shown in FIG. FIG. 6 is a functional block diagram of a second NAS 2B shown in FIG. 2 is a flowchart for explaining the operation of the content sharing system 100 shown in FIG. 1. It is a figure which shows the modification of the functional block of the 2nd electronic device 1B shown in FIG.

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

  FIG. 1 is a diagram showing a schematic configuration of a content sharing system 100 according to the first embodiment of the present invention.

  The content sharing system 100 includes a first electronic device 1A, a first NAS (Network Attached Storage) 2A constituting the first network device, a first router 4A, a second electronic device 1B, and a second network device. A second NAS 2B, a second router 4B, and a DDNS server 7 that provides a Dynamic Domain Name System (DDNS) service.

  The first NAS 2A is connected to a first LAN (Local Area Network) 3A that is a network used in a company, a school, a private residence, or the like.

  The first NAS 2A is a device that stores and manages content data such as a still image file or a moving image file, and includes a file management function and a network communication function for network communication.

  In this specification, the content data includes a data body such as still image data or moving image data, and metadata related to the data body (file creation date, creator, file format, title, annotation, thumbnail image, etc. ) And.

  The first LAN 3A is connected to the Internet 6 via the first router 4A.

  The second NAS 2B is connected to a second LAN (Local Area Network) 3B that is a network used in a company, a school, a private residence, or the like.

  The second NAS 2B is a device that stores and manages content data such as a still image file or a moving image file, and includes a file management function and a network communication function for network communication.

  The second LAN 3B is connected to the Internet 6 via the second router 4B.

  The first electronic device 1A and the second electronic device 1B can be connected to the Internet 6 via a mobile communication network 5 provided by a mobile phone company or the like.

  The first electronic device 1A and the second electronic device 1B each have a network communication function for performing network communication, a display unit, and an operation interface (I / F) such as a keyboard, a mouse, or a touch panel. It is an electronic device.

  As the electronic device in this specification, for example, a personal computer, a tablet terminal, a smartphone, or the like is used.

  When the user of the electronic device performs use registration of the first NAS 2A, a storage area that can be freely used in the first NAS 2A is assigned to the user. When a plurality of users are registered for use, this storage area may be used separately for each user. In the present embodiment, the user of the first electronic device 1A has registered for use in the first NAS 2A in advance.

  In addition, when the user of the electronic device performs use registration of the second NAS 2B, a storage area that can be freely used in the second NAS 2B is allocated to the user. When a plurality of users are registered for use, this storage area may be used separately for each user. In the present embodiment, the user of the second electronic device 1B has registered for use in advance in the second NAS 2B.

  The DDNS server 7 is connected to the Internet 6 and stores the correspondence relationship between the global IP address dynamically assigned to the first NAS 2A and the name unique to the first NAS 2A while sequentially updating it.

  The DDNS server 7 stores the correspondence between the global IP address dynamically assigned to the second NAS 2B and the name unique to the second NAS 2B while sequentially updating the correspondence.

  In response to a request from the first NAS 2A, the DDNS server 7 returns a global IP address corresponding to the name of the second NAS 2B to the request source. The first NAS 2A can access the second NAS 2B via the Internet 6 by using this global IP address.

  In response to a request from the second NAS 2B, the DDNS server 7 returns a global IP address corresponding to the name of the first NAS 2A to the request source. The second NAS 2B can access the first NAS 2A via the Internet 6 by using this global IP address. Thus, the first NAS 2A and the second NAS 2B can communicate with each other via the Internet 6.

  FIG. 2 is a diagram illustrating an internal hardware configuration example of the first electronic device 1A in the content sharing system 100 illustrated in FIG.

  The first electronic device 1A includes a CPU (Central Processing Unit) 20a, a ROM (Read Only Memory) 21a, a RAM (Random Access Memory) 22a, a liquid crystal module 230a, a liquid crystal panel 231a, a wireless LAN module 240a, An antenna 241a, a mobile communication module 250a, an antenna 251a, a keyboard, a mouse, or an operation interface (I / F) 260a such as a touch panel integrated with a liquid crystal panel 231a, and an internal storage unit 27a. .

  The CPU 20a, ROM 21a, RAM 22a, liquid crystal module 230a, wireless LAN module 240a, mobile communication module 250a, operation interface 260a, and internal storage unit 27a are connected by a common bus.

  The CPU 20a controls the operation of the entire first electronic device 1A by being executed after a program such as firmware stored in the ROM 21a is expanded in the RAM 22a.

  The ROM 21a stores a program such as the above-described firmware and various setting data. The RAM 22a operates as a main memory of the first electronic device 1A and stores various programs and data.

  The liquid crystal panel 231a is a display unit for displaying information.

  When a display controller (for example, GPU (Graphics Processing Unit)) (not shown) receives display data from the CPU 20a, the liquid crystal module 230a creates data constituting the display screen and drives the liquid crystal panel 231a based on this data. Thus, a desired display screen is displayed in the display area of the liquid crystal panel 231a. .

  The wireless LAN module 240a is a module for performing wireless communication.

  The wireless LAN module 240a is based on, for example, the IEEE (The Institute of Electrical and Electronics Engineers) 802.11 standard. When the wireless LAN module 240a performs wireless communication with the first router 4A via the antenna 241a, the first electronic device 1A is connected to the first LAN 3A without going through the mobile communication network 5 and the Internet 6. It becomes possible.

  The mobile communication module 250a performs mobile wireless communication with the mobile communication network 5 via the antenna 251a in accordance with, for example, the IMT (International Mobile Telecommunications) -2000 standard.

  Standards supported by the mobile communication module 250a include 3G / HSDPA (3rd Generation / High-Speed Downlink Packet Access), LTE (Long Term Internet Acceleration), and WiMAX (Worldwide Interoperability).

  The internal storage unit 27a includes an internal storage 270a and an internal storage interface (I / F) 271a.

  The internal storage 270a is a nonvolatile semiconductor memory such as a flash memory, and stores application data used in the first electronic device 1A or various data such as content data. The internal storage 270a functions as a storage medium for the first electronic device 1A.

  The internal storage 270a stores a program (hereinafter referred to as a content management application) for using the first NAS 2A by the operation of the user of the first electronic device 1A. The content management application includes an operation program for the first electronic device 1A.

  The first electronic device 1A can upload content data to the first NAS 2A, download content data stored in the first NAS 2A, or the like by the function of the content management application.

  The internal storage interface 271a controls the entire internal storage 270a when content data is read or written to the internal storage 270a, and performs read or write control of the content data, and reads the read content data. Output.

  Note that the internal storage 270a may be a detachable nonvolatile memory card. In this case, the internal storage interface 271a further includes a memory card slot in which the memory card is inserted.

  FIG. 3 is a diagram illustrating an internal hardware configuration example of the second electronic device 1B in the content sharing system 100 illustrated in FIG.

  The second electronic device 1B includes a CPU 20b, a ROM 21b, a RAM 22b, a liquid crystal module 230b, a liquid crystal panel 231b, a wireless LAN module 240b, an antenna 241b, a mobile communication module 250b, an antenna 251b, a keyboard, and a mouse. Alternatively, an operation interface (I / F) 260b such as a touch panel integrated with the liquid crystal panel 231b and an internal storage unit 27b are provided.

  The CPU 20b, ROM 21b, RAM 22b, liquid crystal module 230b, wireless LAN module 240b, mobile communication module 250b, operation interface 260b, and internal storage unit 27b are connected by a common bus.

  The CPU 20b controls the operation of the entire second electronic device 1B by being executed after a program such as firmware stored in the ROM 21b is expanded in the RAM 22b.

  The ROM 21b stores the above-described program such as firmware and various setting data. The RAM 22b operates as a main memory of the second electronic device 1B, and stores various programs and data.

  The liquid crystal panel 231b is a display unit for displaying information.

  When a display controller (for example, GPU) (not shown) receives display data from the CPU 20b, the liquid crystal module 230b creates data constituting a display screen and drives the liquid crystal panel 231b based on this data, and the liquid crystal panel 231b. A desired display screen is displayed in the display area.

  The wireless LAN module 240b is a module for performing wireless communication.

  The wireless LAN module 240b is compliant with, for example, the IEEE 802.11 standard. When the wireless LAN module 240b performs wireless communication with the second router 4B via the antenna 241b, the second electronic device 1B is connected to the second LAN 3B without passing through the mobile communication network 5 and the Internet 6. It becomes possible.

  The mobile communication module 250b performs mobile wireless communication with the mobile communication network 5 via the antenna 251b in accordance with, for example, the IMT-2000 standard.

  Standards supported by the mobile communication module 250b may include 3G / HSDPA, LTE, WiMAX, or the like.

  The internal storage unit 27b includes an internal storage 270b and an internal storage interface (I / F) 271b.

  The internal storage 270b is a non-volatile semiconductor memory such as a flash memory, for example, and stores various data such as application programs used in the second electronic device 1B or content data. The internal storage 270b functions as a storage medium for the second electronic device 1B.

  The internal storage 270b stores a program (the content management application described above) for using the second NAS 2B by an operation of the user of the second electronic device 1B. The content management application includes an operation program for the second electronic device 1B.

  The second electronic device 1B can upload content data to the second NAS 2B, download content data stored in the second NAS 2B, or the like by the function of the content management application.

  The internal storage interface 271b controls the entire internal storage 270b when content data is read or written to the internal storage 270b, and performs read or write control of the content data, and reads the read content data. Output.

  The internal storage 270b may be a detachable nonvolatile memory card. In this case, the internal storage interface 271b further includes a memory card slot in which the memory card is inserted.

  FIG. 4 is a diagram showing an internal hardware configuration example of the first NAS 2A in the content sharing system 100 shown in FIG.

  The first NAS 2A includes a CPU 30a, a ROM 31a, a RAM 32a, an HDD unit 33a, and a wired LAN module 34a.

  The CPU 30a, the ROM 31a, the RAM 32a, the HDD unit 33a, and the wired LAN module 34a are connected by a common bus.

  The CPU 30a controls the operation of the entire first NAS 2A by being executed after a program such as firmware stored in the ROM 31a is expanded in the RAM 32a.

  The ROM 31a stores a program such as the firmware described above. The RAM 32a operates as a main memory of the first NAS 2A and stores various programs and data.

  The HDD unit 33a includes an HDD 330a and an HDD interface (I / F) 331a.

  The HDD 330a includes a disk that is a storage medium, a rotating unit that rotates the disk, and a head unit that reads and writes data from and to the disk (all not shown). The disk of the HDD 330a includes a storage area allocated to the user who has registered for use (the user of the first electronic device 1A).

  The HDD interface 331a controls the entire HDD 330a, performs data read / write control, and outputs the read data when there is a data read / write command to the HDD 330a.

  A semiconductor memory such as an SSD (Solid State Drive) may be used instead of the HDD unit 33a.

  The wired LAN module 34a performs wired communication with the first router 4A in accordance with, for example, the IEEE 802.3 standard. Instead of the wired LAN module 34a, for example, a module that performs wireless communication with the first router 4A based on the IEEE 802.11 standard may be used.

  Instead of the wired LAN module 34a, an interface compliant with a standard such as USB (Universal Serial Bus), IEEE 1394, SCSI (Small Computer System Interface), or serial ATA may be used.

  FIG. 5 is a diagram showing an internal hardware configuration example of the second NAS 2B in the content sharing system 100 shown in FIG.

  The second NAS 2B includes a CPU 30b, a ROM 31b, a RAM 32b, an HDD unit 33b, and a wired LAN module 34b.

  The CPU 30b, the ROM 31b, the RAM 32b, the HDD unit 33b, and the wired LAN module 34b are connected by a common bus.

  The CPU 30b controls the operation of the entire second NAS 2B by being executed after a program such as firmware stored in the ROM 31b is expanded in the RAM 32b.

  The ROM 31b stores a program such as the firmware described above. The RAM 32b operates as a main memory of the second NAS 2B and stores various programs and data.

  The HDD unit 33b includes an HDD 330b and an HDD interface (I / F) 331b.

  The HDD 330b includes a disk that is a storage medium, a rotating unit that rotates the disk, and a head unit that reads and writes data from and to the disk (all not shown). The disk of the HDD 330b includes a storage area allocated to the user who has registered for use (the user of the second electronic device 1B).

  The HDD interface 331b controls the entire HDD 330b, performs data read / write control, and outputs the read data when there is a data read / write command to the HDD 330b.

  A semiconductor memory such as an SSD may be used instead of the HDD unit 33b.

  The wired LAN module 34b performs wired communication with the second router 4B in accordance with, for example, the IEEE 802.3 standard. Instead of the wired LAN module 34b, for example, a module that performs wireless communication with the second router 4B in accordance with the IEEE 802.11 standard may be used.

  Instead of the wired LAN module 34b, an interface compliant with a standard such as USB (Universal Serial Bus), IEEE 1394, SCSI (Small Computer System Interface), or serial ATA may be used.

  FIG. 6 is a functional block diagram of the first NAS 2A shown in FIG.

  The first NAS 2A executes the program including the operation program stored in the ROM 31a of the first NAS 2A, and the CPU 30a cooperates with various modules and interfaces, thereby generating the receiving unit 30A, the storage control unit 30B, and link information generation. Functions as the unit 30C, the encryption unit 30D, and the transmission unit 30E.

  The receiving unit 30A receives content data stored in the internal storage 270a of the first electronic device 1A of the user who has registered for use from the first electronic device 1A. The content data received by the receiving unit 30A does not include link information described later.

  The storage control unit 30B stores the content data received by the receiving unit 30A in a storage area assigned to the user of the first electronic device 1A.

  The link information generation unit 30C generates link information for accessing the content data stored in the storage area.

  The link information for accessing arbitrary content data is information (for example, URL) indicating the storage location of the content data.

  The encryption unit 30D encrypts the link information generated by the link information generation unit 30C. The encryption method of the link information is not particularly limited, but for example, AES (Advanced Encryption Standard) or the like is used.

  The transmission unit 30E transmits the link information encrypted by the encryption unit 30D to the first electronic device 1A that is the transmission source of the content data received by the reception unit 30A.

  FIG. 7 is a functional block diagram of the first electronic device 1A shown in FIG.

  The first electronic device 1A is configured such that the CPU 20a executes the content management application installed in the first electronic device 1A and cooperates with various modules and interfaces, so that the transmission unit 20A, the link information acquisition unit 20B, It functions as the metadata editing unit 20C.

  The transmission unit 20A transmits the content data stored in the internal storage 270a to the first NAS 2A, which is a device that is registered for use by the user of the first electronic device 1A.

  Specifically, the transmission unit 20A satisfies a predetermined condition (periodic timing or a specific condition such that the first electronic device 1A is connected to the first LAN 3A without going through the mobile communication network 5). Etc.), a list of file names of content data stored in the storage area of the first NAS 2A assigned to the user of the first electronic device 1A, and file names of content data stored in the internal storage 270a Compare the list with

  Based on this comparison, the transmission unit 20A identifies content data that is not stored in the storage area of the first NAS 2A as content data to be backed up from content data stored in the internal storage 270a. Then, the transmitting unit 20A transmits the specified content data to be backed up to the first NAS 2A and stores it in the storage area of the first NAS 2A.

  Thus, the user of the first electronic device 1A can regularly back up the content data stored in the internal storage 270a of the first electronic device 1A.

  When content data that does not include link information is transmitted from the first electronic device 1A to the first NAS 2A, as described above, in the first NAS 2A, this content data is stored in the HDD 330a, and the content data stored in the HDD 330a is stored in the content data. Link information for access is generated, and this link information is transmitted to the first electronic device 1A.

  The link information acquisition unit 20B receives link information from the first NAS 2A, which is a device registered by the user of the first electronic device 1A, and acquires link information from the first NAS 2A.

  The link information acquisition unit 20B associates and manages the transmitted content data transmitted to the first NAS 2A by the transmission unit 20A and the link information generated by the first NAS 2A corresponding to the transmitted content data. To do.

  The metadata editing unit 20C stores link information corresponding to the content data in the metadata of the transmitted content data stored in the internal storage 270a.

  The metadata editing unit 20C is able to grasp the outline of the data body of the content data while reducing the data size (compression processing, resizing processing, low resolution processing, color reduction processing, trimming processing, or low frame rate Even when the processing or the like is performed on the content data, the link information is stored in the metadata area of the content data that is unlikely to lose information.

  FIG. 8 is a functional block diagram of the second electronic device 1B shown in FIG.

  The second electronic device 1B functions as the data acquisition unit 20D and the transmission unit 20E when the CPU 20b executes the content management application installed in the second electronic device 1B and cooperates with various modules and interfaces. .

  The data acquisition unit 20D acquires small content data having a smaller capacity than the arbitrary content data generated from the arbitrary content data stored in the internal storage 270a of the first electronic device 1A, and stores the small content data in the internal storage 270b. .

  For small content data, processing to reduce the data capacity while making it possible to grasp the outline of the data body of this arbitrary content data (compression processing, resizing processing, low resolution processing, color reduction processing, trimming) Processing or a process for reducing the frame rate).

  The data acquisition unit 20D only needs to be able to acquire small content data by some method, and the acquisition method illustrated below can be considered.

(First data acquisition method)
The user of the first electronic device 1A generates small content data by performing a process of reducing the capacity of arbitrary content data including link information using an image processing application installed in the first electronic device 1A.

  Then, the user of the first electronic device 1A uses the WEB mail service, SMS, or MMS to send this small content data to the second electronic device 1B by attaching it to an e-mail. The data acquisition unit 20D of the second electronic device 1B acquires the small content data received by this electronic mail and stored in the second electronic device 1B.

(Second data acquisition method)
The user of the first electronic device 1A performs an operation of transmitting arbitrary content data including link information to the second electronic device 1B using the messenger application installed in the first electronic device 1A.

  When this operation is performed, small content data is generated from the arbitrary content data by the function of the messenger application, and the small content data is transmitted to the second electronic device 1B. The data acquisition unit 20D of the second electronic device 1B acquires small content data received by the messenger application and stored in the second electronic device 1B.

(Third data acquisition method)
The user of the first electronic device 1A generates small content data by performing a process of reducing the capacity of arbitrary content data including link information using an image processing application installed in the first electronic device 1A. When the first electronic device 1A and the second electronic device 1B are each equipped with a communication interface based on a near field communication standard such as Bluetooth (registered trademark) or NFC (Near Field Communication), the first electronic device The user 1A transmits the small content data to the second electronic device 1B by short-range wireless communication. The data acquisition unit 20D acquires small content data received from the first electronic device 1A by short-range wireless communication.

(Fourth data acquisition method)
The user of the first electronic device 1A generates small content data by performing a process of reducing the capacity of arbitrary content data including link information using an image processing application installed in the first electronic device 1A. In the case where the internal storage 270a and the internal storage 270b are detachable, the data acquisition unit 20D performs the internal storage 270a in the state where the internal storage 270a of the first electronic device 1A is attached to the second electronic device 1B. The small content data is acquired from 270a.

(Fifth data acquisition method)
The user of the first electronic device 1A performs an operation of uploading arbitrary content data including link information to his / her blog. When this operation is performed, the small content data is generated from the arbitrary content data by the function of the server that provides the blog service, and the small content data is uploaded to the blog.

  The user of the second electronic device 1B downloads and stores the small content data uploaded to the blog to the second electronic device 1B. The data acquisition unit 20D of the second electronic device 1B acquires the small content data stored in the second electronic device 1B in this way.

  The transmission unit 20E has a function of backing up content data stored in the internal storage 270b to the second NAS 2B, similarly to the transmission unit 20A of the first electronic device 1A. In synchronization with this backup timing, the small content data including the link information is transmitted to the second NAS 2B.

  Specifically, the transmission unit 20E satisfies a specific condition such as a predetermined timing (periodic timing or the second electronic device 1B is connected to the second LAN 3B without going through the mobile communication network 5). Etc.), a list of file names of content data stored in the storage area of the second NAS 2B allocated to the user of the second electronic device 1B, and file names of content data stored in the internal storage 270b Compare the list with

  Then, the transmission unit 20E specifies content data that is not stored in the storage area of the second NAS 2B among the content data stored in the internal storage 270b as content data to be backed up. The transmission unit 20E transmits the specified content data to be backed up to the second NAS 2B and stores it in the storage area of the second NAS 2B.

  FIG. 9 is a functional block diagram of the second NAS 2B shown in FIG.

  In the second NAS 2B, the CPU 30b executes a program including an operation program stored in the ROM 31b of the second NAS 2B, and cooperates with various modules and interfaces, whereby the data receiving unit 30F, the decryption processing unit 30G, and the content data It functions as the acquisition unit 30H and the storage control unit 30I.

  The data receiving unit 30F receives small content data including link information from the second electronic device 1B, which is an electronic device used by a user registered to use the second NAS 2B.

  The decryption processing unit 30G decrypts the link information included in the small content data received by the data receiving unit 30F.

  The content data acquisition unit 30H accesses the first NAS 2A based on the link information decoded by the decoding processing unit 30G, and acquires the content data from the first NAS 2A.

  The storage control unit 30I stores the content data acquired by the content data acquisition unit 30H in the storage area of the HDD 330b allocated to the user of the second electronic device 1B.

  When the content data cannot be acquired from the first NAS 2A based on the link information decoded by the decoding processing unit 30G, the storage control unit 30I deletes the link information from the small content data including the link information before decoding, Small content data not including link information is stored in the storage area.

  Note that the operation program stored in the ROM 31a of the first NAS 2A and the operation program stored in the ROM 31b of the second NAS 2B are the same.

  For this reason, the CPU 30b of the second NAS 2B executes the operation program stored in the ROM 31b, thereby receiving the receiving unit 30A, the storage control unit 30B, the link information generating unit 30C, the encryption unit 30D, and the CPU 30a of the first NAS 2A. , Functions in the same manner as each of the transmission units 30E.

  Further, the CPU 30a of the first NAS 2A executes the operation program stored in the ROM 31a, whereby the data reception unit 30F, the decryption processing unit 30G, the content data acquisition unit 30H, and the storage control unit 30I of the CPU 30b of the second NAS 2B. Functions in the same manner as each of the above.

  The content management application installed in the first electronic device 1A and the second electronic device 1B is the same. For this reason, the CPU 20a of the first electronic device 1A functions in the same manner as the data acquisition unit 20D of the CPU 20b of the second electronic device 1B by executing the content management application.

  Further, the CPU 20b of the second electronic device 1B functions in the same manner as each of the link information acquisition unit 20B and the metadata editing unit 20C of the CPU 20a of the first electronic device 1A by executing the content management application.

  That is, the CPU 30b of the second NAS 2B receives the content data stored in the internal storage 270b of the second electronic device 1B from the second electronic device 1B, and the content data received by the receiving unit is received by the second electronic device. A storage control unit for storing in a storage area allocated to the user of 1B, a link information generation unit for generating link information for accessing content data stored in the storage area, and a link generated by the link information generation unit It functions as an encryption unit that encrypts information and a transmission unit that transmits the link information encrypted by the encryption unit to the second electronic device 1B.

  In addition, the CPU 20b of the second electronic device 1B includes a link information acquisition unit that acquires link information from the second NAS 2B, and the content data metadata that has been transmitted to the second NAS 2B stored in the internal storage 270b. It functions as a metadata editing unit that stores link information corresponding to data.

  Further, the CPU 20a of the first electronic device 1A obtains small content data having a smaller capacity than the arbitrary content data generated from the arbitrary content data stored in the internal storage 270b of the second electronic device 1B. It functions as a part.

  Further, the CPU 30a of the first NAS 2A has a data receiving unit that receives small content data including link information from the first electronic device 1A, and a decoding processing unit that decodes link information included in the small content data received by the data receiving unit. The content data acquisition unit that accesses the second NAS 2B based on the link information decoded by the decoding processing unit and acquires the content data from the second NAS 2B, the content data acquired by the content data acquisition unit, It functions as a storage controller that stores data in the storage area of the HDD 330a assigned to the user of the electronic apparatus 1A.

  FIG. 10 is a sequence chart for explaining the operation of the content sharing system 100 shown in FIG. Hereinafter, an operation in the case where the user of the second electronic device 1B shares content data owned by the user of the first electronic device 1A will be described as an example.

  The transmission unit 20A of the first electronic device 1A determines whether or not it is a backup timing. When the backup timing comes, a backup process is executed (step S1), and the backup stored in the internal storage 270a of the first electronic device 1A. The target content data is transmitted to the first NAS 2A by the transmission unit 20A of the first electronic device 1A (step S2). It is assumed that the content data transmitted in step S2 does not include the link information.

  The content data transmitted in step S2 is received by the receiving unit 30A of the first NAS 2A, and stored in the storage area allocated to the user of the first electronic device 1A by the storage control unit 30B of the first NAS 2A (step S3). ).

  Next, link information (for example, URL) for accessing the content data stored in step S3 is generated by the link information generating unit 30C of the first NAS 2A (step S4), and this link information is encrypted by the first NAS 2A. It is encrypted by the unit 30D (step S5).

  The link information encrypted in step S5 is transmitted to the first electronic device 1A by the transmission unit 30E of the first NAS 2A (step S6).

  The link information transmitted in step S6 is acquired by the link information acquisition unit 20B of the first electronic device 1A (step S7), and the content data transmitted in step S2 by the metadata editing unit 20C of the first electronic device 1A. (Step S8).

  Thereafter, the user of the first electronic device 1A selects content data including link information stored in the internal storage 270a, and transmits the selected content data to the second electronic device 1B using, for example, a messenger application. Perform the operation.

  In response to this operation, the first electronic device 1A performs processing for reducing the capacity of the selected content data by the function of the messenger application, and small content data is generated from this content data. Then, the small content data is transmitted to the second electronic device 1B via the mobile communication network 5 (step S9).

  When the user of the second electronic device 1B receives the small content data transmitted from the first electronic device 1A, the user performs an operation of saving the small content data in the internal storage 270b. By this operation, the small content data is stored in the internal storage 270b (step S10).

  After step S10, the second electronic device 1B determines whether or not the backup timing is reached, and the backup process is started when the backup timing is reached (step S11). When the backup process is started, the small content data stored in step S10 is acquired by the data acquisition unit 20D of the second electronic device 1B (step S12), and the second NAS 2B is transmitted by the transmission unit 20E of the second electronic device 1B. (Step S13).

  The small content data transmitted in step S13 is received by the data receiving unit 30F of the second NAS 2B and temporarily stored in the RAM 32b. Then, the link information included in the metadata of the small content data is decrypted by the decryption processing unit 30G of the second NAS 2B (Step S14).

  The content data acquisition unit 30H of the second NAS 2B requests the first NAS 2A to transmit content data corresponding to the link information based on the link information decrypted in step S14 (step S15).

  In response to this request, the transmission unit 30E of the first NAS 2A reads the requested content data from the HDD 330a and transmits it to the second NAS 2B (step S16).

  The content data transmitted in step S16 is received by the second NAS 2B and acquired by the content data acquisition unit 30H of the second NAS 2B. Then, the content data is stored in the HDD 330b by the storage control unit 30I of the second NAS 2B (step S18).

  In step S15, when the content data acquisition unit 30H of the second NAS 2B cannot access the content data based on the link information, it is stored in the RAM 32b by the storage control unit 30I of the second NAS 2B. The link information is deleted from the metadata of the small content data, and the small content data from which the link information has been deleted is stored in the HDD 330b (step S17).

  The list of file names of content data stored in the HDD 330b of the second NAS 2B is updated by the process of step S17 or step S18. Further, the storage control unit 30l of the second NAS 2B associates the file name of the content data acquired based on the link information with the file name of the small content data including the link information and stores it in the above list.

  The content data stored in the HDD 330b in the process of step S18 can be downloaded to the second electronic device 1B. Therefore, the user of the first electronic device 1A and the user of the second electronic device 1B can share the same content data.

  As described above, according to the content sharing system 100, arbitrary content data stored in the first electronic device 1A is transmitted from the first NAS 2A to the second NAS 2B, so that the user of the first electronic device 1A The arbitrary content data is shared between the users of the second electronic device 1B with the original size.

  For this reason, the user of the first electronic device 1A and the user of the second electronic device 1B do not transmit / receive any content data using the mobile communication network 5 in which the communication amount may be limited. Arbitrary content data can be shared. Therefore, it is possible to share original size content data without worrying about the traffic.

  Further, according to the content sharing system 100, link information for accessing the content data is stored in the metadata of the content data backed up from the first electronic device 1A to the first NAS 2A. And based on this link information, content data can be shared between users.

  This link information is stored in an area that is not deleted even when content data is converted into small content data. For this reason, the user of the first electronic device 1A can simply store the content data to the second electronic device 1B using any means such as a messenger application, and the user can store the first electronic device 1A in the first electronic device 1A. Content data can be shared by the user of the second electronic device 1B. As described above, according to the content sharing system 100, it is possible to share content data without a user performing complicated work.

  In the content sharing system 100, the link information transmitted from the first electronic device 1A to the second electronic device 1B is encrypted. For this reason, even when link information leaks in the communication path between the first electronic device 1A and the second electronic device 1B, it is possible to prevent leakage of content data stored in the first NAS 2A.

  In the content sharing system 100, the link information is encrypted in the first NAS 2A, and the link information is decrypted in the second NAS 2B. For this reason, even when link information leaks in the communication path between the first NAS 2A and the first electronic device 1A, or the communication path between the second electronic device 1B and the second NAS 2B, it is stored in the first NAS 2A. It is possible to prevent leakage of content data.

  In the content sharing system 100, the small content data acquired from the first electronic device 1A is stored in the internal storage 270b of the second electronic device 1B, and the original size content data corresponding to the small content data is stored in the second NAS 2B. Is stored in the HDD 330b. For this reason, the user of the second electronic device 1B can share content data without worrying about the capacity of the internal storage 270b of the second electronic device 1B.

  Further, in the content sharing system 100, the CPU 20b of the second electronic device 1B receives the second small content data including the link information in synchronization with the timing at which the content data stored in the internal storage 270b is backed up to the second NAS 2B. Send to NAS2B. Thereby, content data is memorize | stored in 2nd NAS2B based on link information. Therefore, the user of the second electronic device 1B can share content data without being particularly conscious.

  In the content sharing system 100, if the second NAS 2B cannot acquire content data based on the link information, the link information is deleted from the small content data including the link information, and the small content data is stored in the storage area. Is remembered. For this reason, even when the link information is damaged, the small content data stored in the second electronic device 1B can be backed up, and the backup function can be sufficiently performed.

  FIG. 11 is a diagram illustrating a modification of the functional blocks of the second electronic device 1B illustrated in FIG. In FIG. 11, blocks having the same functions as those in FIG.

  The second electronic device 1B functions as the management unit 20F and the content reproduction unit 20G by the CPU 20b executing the content management application and cooperating with various modules and interfaces.

  The management unit 20F associates and manages the small content data transmitted from the transmission unit 20E to the second NAS 2B and the content data stored in the HDD 330b of the second NAS 2B based on the link information included in the small content data. To do.

  Specifically, the management unit 20F acquires a list of file names of content data stored in the storage area of the HDD 330b from the second NAS 2B. Among the content data in this list, the content data acquired based on the link information stores the file name of the small content data including the link information in association with each other as described above.

  Therefore, the management unit 20F manages the correspondence between the small content data including the link information stored in the internal storage 270b and the content data stored in the second NAS 2B based on the link information, using this list. be able to.

  When an operation for selecting small content data including link information stored in the internal storage 270b is performed, the content reproduction unit 20G selects a file of the selected small content data based on the list acquired by the management unit 20F. The content data corresponding to the name is acquired from the second NAS 2B, and the acquired content data is reproduced.

  The reproduction of the content data refers to display of a still image or a moving image based on the main data of the content data on the liquid crystal panel 231a, or display of a thumbnail image included in the metadata of the content data on the liquid crystal panel 231a. .

  The first electronic device 1A functions in the same manner as the management unit 20F and the content reproduction unit 20G when the CPU 20a executes the content management application.

  According to the above configuration, the user of the second electronic device 1B simply performs the operation of selecting the small content data stored in the internal storage 270b, and the original size content data corresponding to the small content data is stored in the first content data. Two NAS2B can be acquired and played back. As a result, the original size content data can be obtained and confirmed smoothly when necessary, and the convenience of the content management application can be improved.

  In the above description, the small content data including the link information is transmitted from the first electronic device 1A to the second electronic device 1B in step S9 of FIG. The data transmitted to 1B only needs to include at least link information.

  For example, when the user of the first electronic device 1A performs an operation of sharing content data including link information stored in the internal storage 270a of the first electronic device 1A, the first electronic device 1A The link information included in the data is acquired, and the acquired link information is transmitted to the second electronic device 1B via the mobile communication network 5 or near field communication.

  The first electronic device 1A converts the link information into a bar code or a two-dimensional code and displays it on the liquid crystal panel 231a. The user of the second electronic device 1B uses the second electronic device 1B to display the bar code or the two-dimensional code. By reading, the link information may be transmitted from the first electronic device 1A to the second electronic device 1B.

  The data acquisition unit 20D of the second electronic device 1B acquires link information from the first electronic device 1A, and the transmission unit 20E of the second electronic device 1B transmits this link information to the second NAS 2B.

  In the second NAS 2B, this link information is received by the data receiving unit 30F, and the received link information is decoded by the decoding processing unit 30G. Furthermore, content data is acquired by the content data acquisition unit 30H based on the decrypted link information, and the acquired content data is stored in the HDD 330b by the storage control unit 30I.

  As described above, if at least link information can be passed from the first electronic device 1A to the second electronic device 1B, content data of the original size can be obtained between the user of the first electronic device 1A and the user of the second electronic device 1B. Can be shared.

  In the above description, the transmission unit 20E of the second electronic device 1B transmits small content data including link information to the second NAS 2B in step S13 of FIG. The transmission unit 20E determines whether or not the content data to be backed up includes link information. If the content data includes link information, only the link information may be transmitted to the second NAS 2B.

  In this case, in the second NAS 2B, this link information is received by the data receiving unit 30F, and the received link information is decoded by the decoding processing unit 30G. Furthermore, content data is acquired by the content data acquisition unit 30H based on the decrypted link information, and the acquired content data is stored in the HDD 330b by the storage control unit 30I.

  As described above, the configuration in which only the link information is transmitted from the second electronic device 1B to the second NAS 2B can reduce the amount of communication between the second electronic device 1B and the second NAS 2B.

  For this reason, even when the user of the second electronic device 1B is connected to the second NAS 2B via the mobile communication network 5 and the Internet 6 on the go, the content data can be shared without worrying about the traffic. Become. In addition, the processing load on the second electronic device 1B can be reduced.

  In the above description, the first NAS 2A or the second NAS 2B encrypts the link information. However, the CPU 20a of the first electronic device 1A or the CPU 20b of the second electronic device 1B executing the content management application The link information may be encrypted.

  In the above description, the first NAS 2A or the second NAS 2B performs the link information decryption process. However, the CPU 20a of the first electronic device 1A or the CPU 20b of the second electronic device 1B executing the content management application You may perform the decoding process of link information.

  In the above description, the first NAS 2A or the second NAS 2B generates link information. However, the CPU 20a of the first electronic device 1A or the CPU 20b of the second electronic device 1B that has executed the content management application Information may be generated.

  When uploading the content data to the first NAS 2A, the CPU 20a of the first electronic device 1A knows the upload destination folder name and the file name of the content data to be uploaded. For this reason, it is possible to generate link information of uploaded content data based on such information.

  In the content sharing system 100 of FIG. 1, the first NAS 2A or the second NAS 2B may limit the number of times content data is downloaded to a device that has accessed based on link information.

  According to this configuration, even when the decrypted link information is leaked, the content data can be prevented from being downloaded by another device, and security can be improved.

  In the content sharing system 100 of FIG. 1, one or both of the first NAS 2A and the second NAS 2B may be a server that provides a cloud storage service. The configuration of this server is a configuration in which the wired LAN modules 34a and 34b are changed to modules for connecting to the Internet 6 in the configuration shown in FIG.

  According to this configuration, even a user who does not own NAS can share content data with other users, and the convenience of the system can be improved.

  In the content sharing system 100 of FIG. 1, one or both of the first NAS 2A and the second NAS 2B are replaced with a personal computer that can be connected to the Internet and is connected to a storage device such as an HDD or a semiconductor memory. It may be a configuration.

  In the content sharing system 100 of FIG. 1, even if one or both of the first NAS 2A and the second NAS 2B are replaced with a wireless communication device (wireless LAN access point) connected to the storage device. Good.

  In the above description, link information is assumed to be encrypted, but encryption of link information is not essential. By encrypting the link information, it is possible to reduce the risk of leakage of content data.

  The content management application and the operation program described above are stored in a non-transitory storage medium in which the computer can read the program. Such a “computer-readable storage medium” includes, for example, an optical medium such as a CD-ROM (Compact Disc-ROM), a magnetic storage medium such as a USB memory or a memory card, and the like. Such a program can also be provided by downloading via the Internet 6.

  As described above, the following items are disclosed in this specification.

(1)
Content sharing comprising: a first network storage device; a first electronic device connected to the first network storage device; a second network storage device; and a second electronic device connected to the second network storage device The first network storage device includes a receiving unit that receives content data from the first electronic device, a storage control unit that stores the content data in a storage area, and content data stored in the storage area A link information generation unit that generates link information for accessing the first electronic device, and a transmission unit that transmits the link information to the first electronic device, wherein the second electronic device includes the first electronic device. A data acquisition unit that acquires data including the link information received from one network storage device. And a transmission unit that transmits the link information to the second network storage device, the second network storage device based on the link information received from the second electronic device. A content data acquisition unit that accesses the device and acquires the content data from the first network storage device; and a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area. Content sharing system.

(2)
A network storage device connected to an electronic device, transmitted from the first electronic device connected to the first network storage device to the first network storage device, and stored in a storage area of the first network storage device A data receiving unit for receiving data including link information for accessing the content data obtained from the electronic device, and accessing the first network storage device based on the link information, and the first network storage device A network storage device comprising: a content data acquisition unit that acquires the content data from: and a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area.

(3)
(2) The network storage device according to (2), wherein the link information received by the data receiving unit is encrypted, and further includes a decryption processing unit that decrypts the encrypted link information, and the content data The acquisition unit is a network storage device that acquires the content data based on the link information decrypted by the decryption processing unit.

(4)
In the network storage device according to (2) or (3), the data received by the data receiving unit includes small content data having a smaller capacity than the content data generated from the content data, A network storage device in which link information is stored in the metadata of the small content data.

(5)
(4) The network storage device according to (4), wherein the storage control unit deletes the link information from the metadata when the content data cannot be acquired based on the link information included in the metadata. A network storage device for storing the small content data in the storage area.

(6)
An electronic device connected to the second network storage device, transmitted from the first electronic device connected to the first network storage device to the first network storage device, and a storage area by the first network storage device A data acquisition unit that acquires data including link information for accessing the content data stored in the content data, and a transmission unit that transmits at least the link information of the data to the second network storage device. The second network storage device accesses the first network storage device based on the link information received from the electronic device, acquires the content data from the first network storage device, and stores the content data Remember to area Child equipment.

(7)
(6) The electronic device according to (6), wherein the data acquired by the data acquisition unit includes small content data having a smaller capacity than the content data generated from the content data by the first electronic device, The link information is an electronic device stored in metadata of the small content data.

(8)
(7) The electronic device according to (7), having a backup function for backing up the content data stored in the storage medium to the second network storage device at a predetermined timing, and the transmission unit at the timing An electronic device that transmits at least the link information of the data to the second network storage device in synchronization.

(9)
The electronic device according to (7) or (8), wherein the small content data and the content data stored in the storage area based on the link information are associated with each other, and the small content An electronic device further comprising: a content reproduction unit that obtains the content data corresponding to the small content data from the second network storage device and reproduces the obtained content data when data is selected.

(10)
(6) The electronic device according to any one of (9), wherein the link information included in the data is encrypted in a state that can be decrypted by the second network storage device. .

(11)
An electronic device connected to the first network storage device, the transmission unit transmitting content data stored in a storage medium to the first network storage device, and the first network storage device stored in a storage area A link information acquisition unit that acquires link information for accessing the content data from the first network storage device, and metadata that stores the link information in the metadata of the content data stored in the storage medium And an editing unit.

(12)
(11) The electronic device according to (11), wherein the link information is encrypted by the first network storage device.

(13)
A network storage device connected to the first electronic device, the receiving unit receiving content data stored in the storage medium of the first electronic device from the first electronic device, and the content data in a storage area A storage control unit for storing, a link information generation unit for generating link information for accessing content data stored in the storage area, an encryption unit for encrypting the link information, and the encrypted link information A transmission unit that transmits the encrypted link information to the metadata of the content data by the first electronic device.

(14)
Content using a first network storage device, a first electronic device connected to the first network storage device, a second network storage device, and a second electronic device connected to the second network storage device In the sharing method, the first network storage device receives content data from the first electronic device, stores the content data in a storage area, and accesses the content data stored in the storage area Generating information, transmitting the link information to the first electronic device, the second electronic device acquiring the link information received by the first electronic device from the first network storage device, and the link information To the second network storage device, and The storage device accesses the first network storage device based on the link information received from the second electronic device, acquires the content data from the first network storage device, and acquires the acquired content data. A content sharing method for storing in a storage area.

(15)
The network storage device connected to the electronic device is transmitted from the first electronic device connected to the first network storage device to the first network storage device and stored in the storage area by the first network storage device. A data receiving step for receiving data including link information for accessing content data from the electronic device, and accessing the first network storage device based on the link information, from the first network storage device, An operation program of the network storage device for executing a content data acquisition step of acquiring content data and a storage control step of storing the content data acquired in the content data acquisition step in a storage area Lamb.

(16)
An electronic device connected to the second network storage device is transmitted from the first electronic device connected to the first network storage device to the first network storage device, and stored in a storage area by the first network storage device A program for executing a data acquisition step for acquiring link information for accessing the content data, and a transmission step for transmitting the link information to the second network storage device. The storage device accesses the first network storage device based on the link information received from the electronic device, acquires the content data from the first network storage device, and stores the content data in a storage area. Machine The working program of.

(17)
A transmission step of transmitting content data stored in a storage medium to the first network storage device to an electronic device connected to the first network storage device; and the content stored in a storage area by the first network storage device. Link information acquisition step of acquiring link information for accessing data from the first network storage device, and metadata editing step of storing the link information in metadata of the content data stored in the storage medium And an electronic device operating program for executing the program.

(18)
A network storage device connected to the first electronic device receives the content data stored in the storage medium of the first electronic device from the first electronic device, and stores the content data in the storage area. A storage control step, a link information generation step for generating link information for accessing content data stored in the storage area, an encryption step for encrypting the link information, and the encrypted link information A transmission step of transmitting to the first electronic device, wherein the encrypted link information is stored in the metadata of the content data by the first electronic device. Operating program.

100 Content Sharing System 1A First Electronic Device 1B Second Electronic Device 2A First NAS
2B Second NAS
3A first LAN
3B Second LAN
4A 1st router 4B 2nd router 5 Mobile communication network 6 Internet 7 DDNS server 20a, 20b CPU
20A transmission unit 20B link information acquisition unit 20C metadata editing unit 20D data acquisition unit 20E transmission unit 20F management unit 20G content reproduction unit 21a, 21b ROM
22a, 22b RAM
230a, 230b Liquid crystal modules 231a, 231b Liquid crystal panels 240a, 240b Wireless LAN modules 241a, 241b Antennas 250a, 250b Mobile communication modules 251a, 251b Antennas 260a, 260b Operation interfaces 27a, 27b Internal storage units 270a, 270b Internal storages 271a, 271b Internal storage interface 30a, 30b CPU
30A Reception unit 30B Storage control unit 30C Link information generation unit 30D Encryption unit 30E Transmission unit 30F Data reception unit 30G Decryption processing unit 30H Content data acquisition unit 30I Storage control units 31a, 31b ROM
32a, 32b RAM
33a, 33b HDD section 330a, 330b HDD
331a, 331b HDD interface 34a, 34b Wired LAN module

Claims (18)

Content sharing comprising: a first network storage device; a first electronic device connected to the first network storage device; a second network storage device; and a second electronic device connected to the second network storage device A system,
The first network storage device includes a receiving unit that receives content data from the first electronic device, a storage control unit that stores the content data in a storage area, and access to the content data stored in the storage area. A link information generation unit that generates link information; and a transmission unit that transmits the link information to the first electronic device.
The second electronic device transmits a data acquisition unit that acquires data including the link information received by the first electronic device from the first network storage device, and transmits the link information to the second network storage device. And comprising
The second network storage device accesses the first network storage device based on the link information received from the second electronic device, and acquires the content data from the first network storage device And a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area. A network storage device connected to an electronic device,
Link information for accessing content data transmitted from the first electronic device connected to the first network storage device to the first network storage device and stored in the storage area of the first network storage device. A data receiving unit for receiving data including the electronic device;
A content data acquisition unit that accesses the first network storage device based on the link information and acquires the content data from the first network storage device;
A storage control unit comprising: a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area. The network storage device according to claim 2,
The link information received by the data receiving unit is encrypted,
A decryption processing unit for decrypting the encrypted link information;
The network storage device, wherein the content data acquisition unit acquires the content data based on link information decrypted by the decryption processing unit. The network storage device according to claim 2 or 3,
The data received by the data receiving unit includes small content data having a smaller capacity than the content data generated from the content data,
The link information is a network storage device stored in metadata of the small content data. The network storage device according to claim 4, wherein
The storage control unit stores the small content data in which the link information is deleted from the metadata in the storage area when the content data cannot be acquired based on the link information included in the metadata. Storage device. An electronic device connected to the second network storage device,
Link information for accessing content data transmitted from the first electronic device connected to the first network storage device to the first network storage device and stored in the storage area by the first network storage device. A data acquisition unit for acquiring data including,
A transmission unit that transmits at least the link information of the data to the second network storage device,
The second network storage device accesses the first network storage device based on the link information received from the electronic device, acquires the content data from the first network storage device, and stores the content data in a storage area Electronic equipment to memorize. The electronic device according to claim 6,
The data acquired by the data acquisition unit includes small content data having a smaller capacity than the content data generated by the first electronic device from the content data,
The link information is an electronic device stored in metadata of the small content data. The electronic device according to claim 7,
A backup function for backing up the content data stored in the storage medium to the second network storage device at a predetermined timing;
The transmission unit is an electronic device that transmits at least the link information of the data to the second network storage device in synchronization with the timing. The electronic device according to claim 7 or 8,
A management unit that manages the small content data in association with the content data stored in the storage area based on the link information;
An electronic device further comprising: a content playback unit that acquires the content data corresponding to the small content data from the second network storage device and plays back the acquired content data when the small content data is selected . The electronic device according to any one of claims 6 to 9,
The link information included in the data is an electronic device that is encrypted in a state that can be decrypted by the second network storage device. An electronic device connected to the first network storage device,
A transmission unit for transmitting content data stored in a storage medium to the first network storage device;
A link information acquisition unit for acquiring link information for accessing the content data stored in the storage area by the first network storage device from the first network storage device;
An electronic device comprising: a metadata editing unit that stores the link information in metadata of the content data stored in the storage medium. The electronic device according to claim 11,
The link information is an electronic device encrypted by the first network storage device. A network storage device connected to the first electronic device,
A receiving unit for receiving content data stored in a storage medium of the first electronic device from the first electronic device;
A storage control unit for storing the content data in a storage area;
A link information generating unit that generates link information for accessing the content data stored in the storage area;
An encryption unit for encrypting the link information;
A transmission unit for transmitting the encrypted link information to the first electronic device,
The network storage device, wherein the encrypted link information is stored in the metadata of the content data by the first electronic device. Content using a first network storage device, a first electronic device connected to the first network storage device, a second network storage device, and a second electronic device connected to the second network storage device A sharing method,
The first network storage device receives content data from the first electronic device, stores the content data in a storage area, generates link information for accessing the content data stored in the storage area, and Sending link information to the first electronic device;
The second electronic device acquires the link information received from the first network storage device by the first electronic device, and transmits the link information to the second network storage device.
The second network storage device accesses the first network storage device based on the link information received from the second electronic device, acquires the content data from the first network storage device, and acquires the acquired A content sharing method for storing content data in a storage area. Network storage devices connected to electronic devices
Link information for accessing content data transmitted from the first electronic device connected to the first network storage device to the first network storage device and stored in the storage area by the first network storage device. Receiving data from the electronic device including data;
A content data acquisition step of accessing the first network storage device based on the link information and acquiring the content data from the first network storage device;
An operation program for the network storage device for executing the storage control step of storing the content data acquired in the content data acquisition step in a storage area. To the electronic device connected to the second network storage device,
Link information for accessing content data transmitted from the first electronic device connected to the first network storage device to the first network storage device and stored in the storage area by the first network storage device. A data acquisition step to acquire;
A transmission step of transmitting the link information to the second network storage device,
The second network storage device accesses the first network storage device based on the link information received from the electronic device, acquires the content data from the first network storage device, and stores the content data in a storage area Electronic device operation program stored in To the electronic device connected to the first network storage device,
Transmitting the content data stored in the storage medium to the first network storage device;
A link information acquisition step for acquiring link information for accessing the content data stored in a storage area by the first network storage device from the first network storage device;
And a metadata editing step for storing the link information in the metadata of the content data stored in the storage medium. To the network storage device connected to the first electronic device,
Receiving the content data stored in the storage medium of the first electronic device from the first electronic device;
A storage control step of storing the content data in a storage area;
A link information generating step for generating link information for accessing the content data stored in the storage area;
An encryption step for encrypting the link information;
A transmission step of transmitting the encrypted link information to the first electronic device, and a program for executing the program,
The encrypted link information is an operation program of the network storage device stored in the metadata of the content data by the first electronic device.

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