JP6806998B2 - Content sharing system, network storage device, electronic device, content sharing method, network storage device operation program, and electronic device operation program - Google Patents

Description

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

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

As a method of sharing content data, 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 can be used. There is a method to notify.

Patent Document 1 is suitable for transmission of content data when the content data is shared with other users by using a message service capable of attaching the content data such as MMS (Multimedia Messaging Service) or SMS (Short Messages Service). It is disclosed to resize to capacity.

Special Table 2010-528508

In the above method using e-mail, when the content data is large in volume, the amount of communication between smartphones using the mobile communication network increases. For this reason, communication costs are high and it takes time to transmit content data.

In order to reduce this amount of communication, as described in Patent Document 1, a method of reducing the capacity of the content data by compression or the like and then attaching the content data to an e-mail and transmitting the data can be considered. However, with this method, the original size content data cannot be shared by a plurality of users.

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

Therefore, it is possible to reduce the communication cost and shorten the transmission time of the content data. However, with this method, the original size content data cannot be shared by a plurality of users.

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

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

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

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 connected to the second network storage device. A content sharing system including an electronic device, wherein 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 the like. The second electronic device includes 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 first electronic device includes a data acquisition unit that acquires data including the link information received from the first network storage device, and a transmission unit that transmits the link information to the second network storage device. The second network storage device is a content data acquisition unit that accesses the first network storage device and acquires the content data from the first network storage device based on the link information received from the second electronic device. It is provided with a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area.

The network storage device of the present invention is a network storage device connected to an electronic device, which is transmitted from the first electronic device connected to the first network storage device to the first network storage device and is the first. A data receiving unit that receives data including link information for accessing the content data stored in the storage area of the network storage device from the electronic device, and the first network storage device is accessed based on the link information. It also includes 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.

The electronic device of the present invention is an electronic device connected to the second network storage device, which is transmitted from the first electronic device connected to the first network storage device to the first network storage device and is said to be the first. A data acquisition unit that acquires data including link information for accessing the content data stored in the storage area by the network storage device, and transmitting 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 and acquires the content data from the first network storage device. However, the content data is stored in the storage area.

The electronic device of the present invention is an electronic device connected to the first network storage device, and includes a transmission unit that transmits content data stored in the storage medium to the first network storage device and the first network storage. The 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 the metadata of the content data stored in the storage medium are described. The metadata editing unit includes a metadata editing unit that stores link information, and the metadata editing unit is located in an area of the metadata that is not deleted from the content data when a process of reducing the data size of the content data is performed. is shall be stored on the link information.

The network storage device of the present invention is a network storage device connected to the first electronic device, and is a receiving unit that receives content data stored in the storage medium of the first electronic device from the first electronic device. , A storage control unit that stores the content data in the 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. The encrypted link information includes a transmission unit that transmits the encrypted link information to the first electronic device, and the encrypted link information reduces the data size of the content data by the first electronic device. It is stored in the metadata area of the content data that is not deleted from the content data when the processing is performed .

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 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. The link information for accessing the content data is generated, the link information is transmitted to the first electronic device, and the second electronic device is the link received by the first electronic device from the first network storage device. The information is acquired, the link information is transmitted 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. The content data is acquired from the first network storage device, and the acquired content data is stored in the storage area.

The operation program of the network storage device of the present invention is transmitted to the network storage device connected to the electronic device from the first electronic device connected to the first network storage device to the first network storage device, and the first (I) Access the first network storage device based on the data reception step of receiving data including link information for accessing the content data stored in the storage area by the network storage device from the electronic device and the link information. Then, the content data acquisition step of acquiring the content data from the first network storage device and the storage control step of storing the content data acquired by the content data acquisition step in the storage area are executed. It is a thing.

The operation program of the electronic device of the present invention is transmitted to the electronic device connected to the second network storage device from the first electronic device connected to the first network storage device to the first network storage device, and said. A data acquisition step for acquiring link information for accessing the content data stored in the storage area by the first network storage device and a transmission step for transmitting the link information to the second network storage device are executed. The second network storage device is a program for accessing the first network storage device based on the link information received from the electronic device to acquire the content data from the first network storage device. The content data is stored in the storage area.

The operation program of the electronic device of the present invention includes a transmission step of transmitting content data stored in a storage medium to the electronic device connected to the first network storage device to the first network storage device, and the first network. The link information acquisition step of acquiring the link information for accessing the content data stored in the storage area by the storage device from the first network storage device, and the data for the content data stored in the storage medium. This is for executing a metadata editing step of storing the link information in the metadata area of the content data that is not deleted from the content data when the size reduction process is performed .

The operation program of the network storage device of the present invention is a reception step in which the 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. A storage control step for storing the content data in the 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. A program for executing the transmission step of transmitting the encrypted link information to the first electronic device, and the encrypted link information is the content data of the first electronic device. The data is stored in the metadata area of the content data that is not deleted from the content data when the data size is reduced .

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

It is a figure which shows the schematic structure of the content sharing system 100 which concerns on 1st Embodiment of this invention. It is a figure which shows the internal hardware configuration example of the 1st electronic device 1A in the content sharing system 100 shown in FIG. It is a figure which shows the internal hardware configuration 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 configuration example of the 1st NAS2A in the content sharing system 100 shown in FIG. It is a figure which shows the internal hardware configuration example of the 2nd NAS2B in the content sharing system 100 shown in FIG. It is a functional block diagram of the first NAS2A shown in FIG. It is a functional block diagram of the first electronic device 1A shown in FIG. It is a functional block diagram of the second electronic device 1B shown in FIG. It is a functional block diagram of the second NAS2B shown in FIG. It is a flowchart for demonstrating the operation of the content sharing system 100 shown in FIG. It is a figure which shows the modification of the functional block of the 2nd electronic device 1B shown in FIG.

Hereinafter, embodiments of the present invention will be described 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 constitutes 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 DDNS (Dynamic Domain Name System) service are provided.

The first NAS2A is connected to the first LAN (Local Area Network) 3A, which is a network used in companies, schools, private homes, and the like.

The first NAS2A is a device that stores and manages content data such as a still image file or a moving image file, and includes a function of performing file management and a network communication function for performing network communication.

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

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, which is a network used in companies, schools, private homes, and the like.

The second NAS2B is a device that stores and manages content data such as a still image file or a moving image file, and includes a function of performing file management and a network communication function for performing 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 each be connected to the Internet 6 via a mobile communication network 5 provided by a mobile phone company or the like.

Each of the first electronic device 1A and the second electronic device 1B has 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 the present specification, for example, a personal computer, a tablet terminal, a smartphone, or the like is used.

When the user of the electronic device registers the use of the first NAS2A, the user is assigned a storage area that can be freely used in the first NAS2A. When a plurality of users have registered for use, this storage area may be individually divided and used for each user. In the present embodiment, the user of the first electronic device 1A has registered the use of the first NAS 2A in advance.

Further, when the user of the electronic device registers the use of the second NAS2B, the user is assigned a storage area that can be freely used in the second NAS2B. When a plurality of users have registered for use, this storage area may be individually divided and used for each user. In the present embodiment, the user of the second electronic device 1B has registered the use of the second NAS 2B in advance.

The DDNS server 7 is connected to the Internet 6 and stores the correspondence between the global IP address dynamically assigned to the first NAS2A and the name unique to the first NAS2A while sequentially updating the correspondence.

Further, the DDNS server 7 stores the correspondence between the global IP address dynamically assigned to the second NAS2B and the name unique to the second NAS2B while sequentially updating the correspondence.

In response to the request from the first NAS2A, the DDNS server 7 returns the global IP address corresponding to the name of the second NAS2B to the requester. By using this global IP address, the first NAS2A can access the second NAS2B via the Internet 6.

Further, the DDNS server 7 returns the global IP address corresponding to the name of the first NAS2A to the requester in response to the request from the second NAS2B. By using this global IP address, the second NAS2B can access the first NAS2A via the Internet 6. In this way, the first NAS2A and the second NAS2B can communicate with each other via the Internet 6.

FIG. 2 is a diagram showing an example of an internal hardware configuration of the first electronic device 1A in the content sharing system 100 shown 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, and the like. It includes an antenna 241a, a mobile communication module 250a, an antenna 251a, an operation interface (I / F) 260a such as a keyboard integrated with a keyboard, a mouse, or 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 each 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 the above-mentioned programs such as firmware and various setting data. The RAM 22a operates as the 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 the display controller (for example, GPU (Graphics Processing Unit)) (for example, GPU (Graphics Processing Unit)) (for example, GPU (Graphics Processing Unit)), which is not shown, receives display data from the CPU 20a, the liquid crystal module 230a creates data constituting a display screen and drives the liquid crystal panel 231a based on the data. The 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 conforms to the IEEE (The Institute of Electrical and Electronics Engineers) 802.11 standard, for example. When the wireless LAN module 240a performs wireless communication with the first router 4A via the antenna 241a, the first electronic device 1A connects to the first LAN 3A without going through the mobile communication network 5 and the Internet 6. It will be possible.

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

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

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

The internal storage 270a is a non-volatile semiconductor memory such as a flash memory, and stores various data such as an application program used in the first electronic device 1A or 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 of the first electronic device 1A.

The first electronic device 1A can upload the content data to the first NAS2A, download the content data stored in the first NAS2A, and the like by the function of the content management application.

When the internal storage interface 271a is instructed to read or write the content data to the internal storage 270a, the internal storage interface 271a controls the entire internal storage 270a and also reads or writes the content data to obtain the read content data. Output.

The internal storage 270a may be a removable non-volatile memory card. In this case, the internal storage interface 271a further includes a memory card slot into which the memory card is mounted.

FIG. 3 is a diagram showing an example of the internal hardware configuration of the second electronic device 1B in the content sharing system 100 shown 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 each connected by a common bus.

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

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

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

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

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

The wireless LAN module 240b conforms to, for example, the IEEE802.11 standard. When the wireless LAN module 240b performs wireless communication with the second router 4B via the antenna 241b, the second electronic device 1B connects to the second LAN 3B without going through the mobile communication network 5 and the Internet 6. It will be possible.

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

The standards supported by the mobile communication module 250b may include 3G / HSDPA, LTE, WiMAX, and 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, and stores various data such as an application program 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.

In the internal storage 270b, a program (the above-mentioned content management application) for using the second NAS 2B is stored by the operation of the user of the second electronic device 1B. This content management application includes an operation program of the second electronic device 1B.

The second electronic device 1B can upload the content data to the second NAS2B, download the content data stored in the second NAS2B, and the like by the function of the content management application.

When the internal storage interface 271b is instructed to read or write the content data to the internal storage 270b, the internal storage interface 271b controls the entire internal storage 270b and also reads or writes the content data to obtain the read content data. Output.

The internal storage 270b may be a removable non-volatile memory card. In this case, the internal storage interface 271b further includes a memory card slot into which the memory card is mounted.

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

The first NAS2A includes a CPU 30a, a ROM 31a, a RAM 32a, an HDD unit 33a, and a wired LAN module 34a.

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

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

A program such as the above-mentioned firmware is stored in the ROM 31a. The RAM 32a operates as the main memory of the first NAS2A 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 as a storage medium, a rotating unit that rotates the disk, and a head unit that reads and writes data to the disk (all not shown). The disk of the HDD 330a includes a storage area allocated to the user registered for use (the user of the first electronic device 1A).

When a data read or write command is given to the HDD 330a, the HDD interface 331a controls the entire HDD 330a, reads or writes data, and outputs the read data.

Instead of the HDD unit 33a, a semiconductor memory such as an SSD (solid state drive) may be used.

The wired LAN module 34a performs wired communication with the first router 4A in accordance with, for example, the IEEE802.3 standard. Instead of the wired LAN module 34a, for example, a module that wirelessly communicates with the first router 4A in accordance with the IEEE802.11 standard may be used.

Further, instead of the wired LAN module 34a, an interface conforming to a standard such as USB (Universal Serial Bus), IEEE1394, SCSI (Small Computer System Interface), or Serial ATA may be used.

FIG. 5 is a diagram showing an example of the internal hardware configuration 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, ROM 31b, RAM 32b, HDD unit 33b, and wired LAN module 34b are each connected by a common bus.

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

A program such as the above-mentioned firmware is stored in the ROM 31b. The RAM 32b operates as the main memory of the second NAS 2B, and various programs and data are stored.

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

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

When a data read or write command is given to the HDD 330b, the HDD interface 331b controls the entire HDD 330b, reads or writes data, and outputs the read data.

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 IEEE802.3 standard. Instead of the wired LAN module 34b, for example, a module that wirelessly communicates with the second router 4B in accordance with the IEEE802.11 standard may be used.

Further, instead of the wired LAN module 34b, an interface conforming to a standard such as USB (Universal Serial Bus), IEEE1394, SCSI (Small Computer System Interface), or Serial ATA may be used.

FIG. 6 is a functional block diagram of the first NAS2A shown in FIG.

In the first NAS2A, the CPU 30a executes a program including an operation program stored in the ROM 31a of the first NAS2A and cooperates with various modules and interfaces to generate link information with the receiving unit 30A and the storage control unit 30B. It functions as a unit 30C, an encryption unit 30D, and a transmission unit 30E.

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

The storage control unit 30B stores the above-mentioned content data received by the reception unit 30A in the 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 a 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 which 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.

In the first electronic device 1A, the CPU 20a executes the above-mentioned content management application installed in the first electronic device 1A and cooperates with various modules and interfaces to form a transmission unit 20A, a link information acquisition unit 20B, and the like. It functions as a 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 registered for use by the user of the first electronic device 1A.

Specifically, the transmission unit 20A satisfies a specific condition such as a predetermined timing (regular timing or the first electronic device 1A is connected to the first LAN 3A without going through the mobile communication network 5). The list of content data file names stored in the storage area of the first NAS2A assigned to the user of the first electronic device 1A and the file names of the content data stored in the internal storage 270a at the same time. Compare with the list of.

By this comparison, the transmission unit 20A identifies the content data stored in the internal storage 270a that is not stored in the storage area of the first NAS2A as the content data to be backed up. Then, the transmission unit 20A transmits the specified content data to be backed up to the first NAS2A and stores it in the storage area of the first NAS2A.

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

When the content data not including the link information is transmitted from the first electronic device 1A to the first NAS2A, as described above, in the first NAS2A, this content data is stored in the HDD330a and becomes the content data stored in the HDD330a. 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 the link information from the first NAS2A, which is a device registered for use by the user of the first electronic device 1A, and acquires the link information from the first NAS2A.

The link information acquisition unit 20B manages the transmitted content data transmitted by the transmission unit 20A to the first NAS2A in association with the link information generated by the first NAS2A in response to the transmitted content data. To do.

The metadata editing unit 20C stores the 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 performs processing for reducing the data size (compression processing, resizing processing, low resolution processing, color reduction processing, trimming processing, or low frame rate) while making it possible to grasp the outline of the data body of the content data. Even when processing) is performed on the content data, the link information is stored in the metadata area of the content data, which 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 a data acquisition unit 20D and a transmission unit 20E by executing the above-mentioned content management application installed in the second electronic device 1B by the CPU 20b and cooperating with various modules and interfaces. ..

The data acquisition unit 20D acquires small content data having a capacity smaller 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 it in the internal storage 270b. ..

Small content data is a process for reducing the data capacity of arbitrary content data while making it possible to grasp the outline of the data body of this arbitrary content data (compression processing, resizing processing, resolution reduction processing, color reduction processing, trimming). It is obtained by performing processing or low frame rate processing, etc.).

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

(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 by 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, MMS, or the like to attach this small content data to the e-mail and transmit it to the second electronic device 1B. The data acquisition unit 20D of the second electronic device 1B acquires small content data received by this e-mail and stored in the second electronic device 1B.

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

When this operation is performed, the function of the messenger application generates small content data from the arbitrary content data, 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 by 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 equipped with a communication interface based on a short-range wireless communication standard such as Bluetooth (registered trademark) or NFC (Near Field Communication), respectively, the first electronic device The user of 1A transmits the above 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 by using an image processing application installed in the first electronic device 1A. When the internal storage 270a and the internal storage 270b are detachable, the data acquisition unit 20D uses the internal storage 20D in a state where the internal storage 270a of the first electronic device 1A is attached to the second electronic device 1B. The above 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 function of the server that provides the blog service generates small content data from this arbitrary content data, and this small content data is uploaded to the blog.

The user of the second electronic device 1B downloads and saves the small content data uploaded to this 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 the 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 the timing of this backup, the small content data including the link information is transmitted to the second NAS2B.

Specifically, the transmission unit 20E satisfies a specific condition such as a predetermined timing (regular timing or the second electronic device 1B is connected to the second LAN 3B without going through the mobile communication network 5). The list of the file names of the content data stored in the storage area of the second NAS2B assigned to the user of the second electronic device 1B and the file names of the content data stored in the internal storage 270b at the same time. Compare with the list of.

Then, the transmission unit 20E specifies the content data stored in the internal storage 270b that is not stored in the storage area of the second NAS2B as the content data to be backed up. The transmission unit 20E transmits the specified content data to be backed up to the second NAS2B and stores it in the storage area of the second NAS2B.

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

In the second NAS2B, the CPU 30b executes a program including an operation program stored in the ROM 31b of the second NAS2B and cooperates with various modules and interfaces to cause the data receiving unit 30F, the decoding processing unit 30G, and the content data. It functions as an acquisition unit 30H and a memory 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 for use in the second NAS 2B.

The decoding processing unit 30G decodes 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 NAS2A based on the link information decoded by the decoding processing unit 30G, and acquires this content data from the first NAS2A.

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 assigned to the user of the second electronic device 1B.

When the content data cannot be acquired from the first NAS2A 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 that does not include link information is stored in the above storage area.

The operation program stored in the ROM 31a of the first NAS2A and the operation program stored in the ROM 31b of the second NAS2B are the same.

Therefore, the CPU 30b of the second NAS 2B executes the operation program stored in the ROM 31b, so that the receiving unit 30A, the storage control unit 30B, the link information generation unit 30C, the encryption unit 30D, and the encryption unit 30D of the CPU 30a of the first NAS 2A , Each of the transmitters 30E functions in the same manner.

Further, the CPU 30a of the first NAS2A executes the operation program stored in the ROM 31a to execute the data receiving unit 30F, the decoding processing unit 30G, the content data acquisition unit 30H, and the storage control unit 30I of the CPU 30b of the second NAS2B. Works the same as each of.

Further, the content management application installed in the first electronic device 1A and the second electronic device 1B is the same. Therefore, 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 is a receiving unit that receives the content data stored in the internal storage 270b of the second electronic device 1B from the second electronic device 1B, and the second electronic device receives the content data received by the receiving unit. A storage control unit that stores in the storage area assigned to the user of 1B, a link information generation unit that generates link information for accessing the 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 link information encrypted by the encryption unit to the second electronic device 1B.

Further, the CPU 20b of the second electronic device 1B adds this content to the metadata of the content data transmitted to the second NAS 2B stored in the link information acquisition unit that acquires the link information from the second NAS 2B and the internal storage 270b. It functions as a metadata editorial unit that stores link information corresponding to the data.

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

Further, the CPU 30a of the first NAS 2A is 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 the link information included in the small content data received by the data receiving unit. , The content data acquisition unit that accesses the second NAS2B based on the link information decoded by the decryption processing unit and acquires this content data from the second NAS2B, and the content data acquired by the content data acquisition unit. (I) It functions as a storage control unit that stores data in the storage area of HDD 330a assigned to the user of the electronic device 1A.

FIG. 10 is a sequence chart for explaining the operation of the content sharing system 100 shown in FIG. Hereinafter, the operation when the user of the second electronic device 1B shares the 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 the backup timing is reached, and when the backup timing comes, the backup process is executed (step S1), and the backup stored in the internal storage 270a of the first electronic device 1A is executed. 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 above link information.

The content data transmitted in step S2 is received by the receiving unit 30A of the first NAS2A, and is stored in the storage area assigned to the user of the first electronic device 1A by the storage control unit 30B of the first NAS2A (step S3). ).

Next, the link information (for example, URL) for accessing the content data stored in step S3 is generated by the link information generation unit 30C of the first NAS2A (step S4), and this link information is encrypted by the first NAS2A. It is encrypted by 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. It is stored in the metadata of (step S8).

After that, the user of the first electronic device 1A selects the content data including the 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 function of the messenger application performs a process of reducing the capacity of the selected content data by the first electronic device 1A, and small content data is generated from the content data. Then, this 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, this 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 when the backup timing comes, the backup process is started (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 NAS2B is acquired by the transmission unit 20E of the second electronic device 1B. Is transmitted to (step S13).

The small content data transmitted in step S13 is received by the data receiving unit 30F of the second NAS2B and temporarily stored in the RAM 32b. Then, the link information included in the metadata of the small content data is decoded by the decoding processing unit 30G of the second NAS2B (step S14).

The content data acquisition unit 30H of the second NAS2B requests the first NAS2A to transmit the 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 NAS2A reads the requested content data from the HDD 330a and transmits it to the second NAS2B (step S16).

The content data transmitted in step S16 is received by the second NAS2B, and is acquired by the content data acquisition unit 30H of the second NAS2B. Then, this content data is stored in the HDD 330b by the storage control unit 30I of the second NAS2B (step S18).

If the content data acquisition unit 30H of the second NAS2B cannot access the content data based on the link information in step S15, it is stored in the RAM 32b by the storage control unit 30I of the second NAS2B. 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).

By the process of step S17 or step S18, the list of the file names of the content data stored in the HDD 330b of the second NAS2B is updated. Further, the storage control unit 30l of the second NAS2B stores the file name of the content data acquired based on the link information in the above list in association with the file name of the small content data including the link information.

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 can be used. The sharing of this arbitrary content data is performed between the users of the second electronic device 1B in the original size.

Therefore, the user of the first electronic device 1A and the user of the second electronic device 1B do not need to send and receive arbitrary content data by using the mobile communication network 5 in which the communication amount may be limited. Any content data can be shared. Therefore, it is possible to share original size content data without worrying about the amount of communication.

Further, according to the content sharing system 100, the 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 NAS2A. Then, the content data can be shared between users based on this link information.

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

Further, in the content sharing system 100, the link information transmitted from the first electronic device 1A to the second electronic device 1B is encrypted. Therefore, even if the link information is leaked in the communication path between the first electronic device 1A and the second electronic device 1B, it is possible to prevent the leakage of the content data stored in the first NAS 2A.

Further, in the content sharing system 100, the link information is encrypted in the first NAS2A, and the link information is decrypted in the second NAS2B. Therefore, even if the link information is leaked 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 existing content data.

Further, 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 the second NAS2B. It is stored in the HDD 330b of. Therefore, the user of the second electronic device 1B can share the 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 synchronizes with the timing of backing up the content data stored in the internal storage 270b to the second NAS2B, and secondly performs the small content data including the link information. Send to NAS2B. As a result, the content data is stored in the second NAS2B based on the link information. Therefore, the user of the second electronic device 1B can share the content data without being particularly conscious of it.

Further, in the content sharing system 100, when the second NAS2B cannot acquire the 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 in. Therefore, even if 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 fulfilled.

FIG. 11 is a diagram showing a modified example of the functional block of the second electronic device 1B shown in FIG. In FIG. 11, blocks having the same functions as those in FIG. 8 are designated by the same reference numerals, and description thereof will be omitted.

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

The management unit 20F manages the small content data transmitted by the transmission unit 20E to the second NAS2B in association with the content data stored in the HDD 330b of the second NAS2B 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 NAS2B. Among the content data in this list, the content data acquired based on the link information is stored in association with the file name of the small content data including the link information 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 NAS2B based on the link information by this list. be able to.

The content playback unit 20G is a file of the selected small content data based on the list acquired by the management unit 20F when the operation of selecting the small content data including the link information stored in the internal storage 270b is performed. The content data corresponding to the name is acquired from the second NAS2B, and the acquired content data is reproduced.

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

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 selects the small content data stored in the internal storage 270b, and obtains the original size content data corresponding to the small content data. (2) It can be acquired from NAS2B and reproduced. As a result, the original size content data can be smoothly acquired and confirmed when needed, and the convenience of the content management application can be improved.

In the above description, in step S9 of FIG. 10, the small content data including the link information is transmitted from the first electronic device 1A to the second electronic device 1B, but the first electronic device 1A to the second electronic device 1B is configured. The data transmitted to 1B may include at least link information.

For example, when a 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 performs this content. 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 short-range wireless communication or the like.

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, and the user of the second electronic device 1B converts this bar code or the two-dimensional code by the second electronic device 1B. 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 the 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 NAS2B, this link information is received by the data receiving unit 30F, and the received link information is decoded by the decoding processing unit 30G. Further, the content data acquisition unit 30H acquires the content data based on the decoded link information, and the acquired content data is stored in the HDD 330b by the storage control unit 30I.

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

Further, in the above description, in step S13 of FIG. 10, the transmission unit 20E of the second electronic device 1B transmits the small content data including the link information to the second NAS 2B, but the second electronic device 1B The transmission unit 20E may determine whether or not the content data to be backed up includes the link information, and if the content data includes the link information, transmit only this link information to the second NAS2B.

In this case, in the second NAS2B, this link information is received by the data receiving unit 30F, and the received link information is decoded by the decoding processing unit 30G. Further, the content data acquisition unit 30H acquires the content data based on the decoded link information, and the acquired content data is stored in the HDD 330b by the storage control unit 30I.

In this way, the amount of communication between the second electronic device 1B and the second NAS 2B can be reduced by configuring the configuration in which only the link information is transmitted from the second electronic device 1B to the second NAS 2B.

Therefore, even when the user of the second electronic device 1B connects 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 amount of communication. Become. Further, the processing load of the second electronic device 1B can be reduced.

Further, in the above description, it is assumed that the first NAS2A or the second NAS2B encrypts the link information, but the CPU 20a of the first electronic device 1A or the CPU 20b of the second electronic device 1B that executes the content management application may be used. The link information may be encrypted.

Further, in the above description, it is assumed that the first NAS2A or the second NAS2B performs the link information decoding process, but the CPU 20a of the first electronic device 1A or the CPU 20b of the second electronic device 1B that executes the content management application may be used. The link information may be decrypted.

Further, in the above description, it is assumed that the first NAS2A or the second NAS2B generates the link information, but the CPU 20a of the first electronic device 1A or the CPU 20b of the second electronic device 1B that executes the content management application links. Information may be generated.

When the CPU 20a of the first electronic device 1A uploads the content data to the first NAS2A, the CPU 20a grasps the name of the upload destination folder and the file name of the content data to be uploaded. Therefore, it is possible to generate the link information of the uploaded content data based on this information.

In the content sharing system 100 of FIG. 1, the first NAS2A or the second NAS2B may set a limit on the number of times of downloading the content data to the device that has accessed based on the link information.

According to this configuration, even if the decrypted link information is leaked, it is possible to prevent the content data from being downloaded by another device, and it is possible to improve security.

In the content sharing system 100 of FIG. 1, one or both of the first NAS2A and the second NAS2B may be servers that provide cloud storage services. In the configuration shown in FIG. 4 or 5, the configuration of this server is such that the wired LAN modules 34a and 34b are changed to modules for connecting to the Internet 6.

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

Further, in the content sharing system 100 of FIG. 1, one or both of the first NAS2A and the second NAS2B 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 have a different configuration.

Further, in the content sharing system 100 of FIG. 1, even if one or both of the first NAS2A and the second NAS2B are replaced with a wireless communication device (wireless LAN access point) connected to the storage device. Good.

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

The content management application and the operation program described above store the program in a computer-readable non-transitory storage medium. 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. It is also possible to provide such a program by downloading via the Internet 6.

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

(1)
Content sharing including 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 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 content data stored in the storage area. The second electronic device includes a link information generation unit that generates link information for accessing the second electronic device, and a transmission unit that transmits the link information to the first electronic device. The second network storage device includes a data acquisition unit that acquires data including the link information received from the network storage device and a transmission unit that transmits the link information to the second network storage device. Based on the link information received from the second electronic device, the content data acquisition unit that accesses the first network storage device and acquires the content data from the first network storage device, and the content data acquisition unit acquires the content data. A content sharing system including a storage control unit that stores the above-mentioned content data in a storage area.

(2)
A network storage device connected to an electronic device, which 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 of the first network storage device. A data receiving unit that receives data including link information for accessing the provided content data from the electronic device, and the first network storage device that accesses the first network storage device based on the link information. A network storage device including a content data acquisition unit that acquires the content data from the user and a storage control unit that stores the content data acquired by the content data acquisition unit in a storage area.

(3)
(2) The content data of the network storage device according to the above, 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. The acquisition unit is a network storage device that acquires the content data based on the link information decoded 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, and said. The link information is a network storage device stored in the metadata of the small content data.

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

(6)
An electronic device connected to the second network storage device, which is transmitted from the first electronic device connected to the first network storage device to the first network storage device and has 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 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. An electronic device that stores in an area.

(7)
(6) The electronic device according to the description, wherein 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 the metadata of the small content data.

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

(9)
The electronic device according to (7) or (8), the management unit that manages the small content data in association with the content data stored in the storage area based on the link information, and the small content. An electronic device further comprising a content reproduction unit that acquires the content data corresponding to the small content data from the second network storage device and reproduces the acquired content data when the data is selected.

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

(11)
An electronic device connected to the first network storage device, the transmission unit that transmits the content data stored in the storage medium to the first network storage device, and the first network storage device stored in the 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. An electronic device equipped with an editorial department.

(12)
(11) The electronic device according to the above, 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 that receives the content data stored in the storage medium of the first electronic device from the first electronic device, and the content data in the 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 network storage device including a transmission unit that transmits the 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.

(14)
Content that uses the first network storage device, the first electronic device connected to the first network storage device, the second network storage device, and the second electronic device connected to the second network storage device. In a sharing method, the first network storage device receives content data from the first electronic device, stores the content data in a storage area, and links for accessing the content data stored in the storage area. Information is generated, the link information is transmitted to the first electronic device, and the second electronic device acquires the link information received by the first electronic device from the first network storage device, and the link information is obtained. Is transmitted 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 the first network storage device A content sharing method of acquiring the content data from the user and storing the acquired content data in a storage area.

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

(16)
The 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 is stored in the storage area by the first network storage device. It is a program for executing a data acquisition step of acquiring link information for accessing the content data, and a transmission step of transmitting the link information to the second network storage device, and is a program for executing the second network. The storage device is an electron that 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 the storage area. Equipment operation program.

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

(18)
The network storage device connected to the first electronic device stores the reception step of receiving the content data stored in the storage medium of the first electronic device from the first electronic device and the content data in the storage area. The storage control step, the link information generation step for generating the link information for accessing the content data stored in the storage area, the encryption step for encrypting the link information, and the encrypted link information are described. It is a program for executing a transmission step of transmitting to the first electronic device, and the encrypted link information is stored in the metadata of the content data by the first electronic device of the network storage device. Operation program.

100 Content sharing system 1A 1st electronic device 1B 2nd electronic device 2A 1st NAS
2B 2nd NAS
3A 1st 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 playback 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 storage 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 unit 31a, 31b ROM
32a, 32b RAM
33a, 33b HDD unit 330a, 330b HDD
331a, 331b HDD interface 34a, 34b Wired LAN module

Claims (18)

Content sharing including 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. It's a system
The first network storage device is for accessing 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 and a transmission unit that transmits the link information to the first electronic device are provided.
The second electronic device includes a data acquisition unit that acquires data including the link information received by the first electronic device from the first network storage device, and a transmission that transmits the link information to the second network storage device. With a department,
The second network storage device is a content data acquisition unit that accesses the first network storage device and acquires the content data from the first network storage device based on the link information received from the second electronic device. A content sharing system including 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 the 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 that receives the included data from the electronic device, and
A content data acquisition unit that accesses the first network storage device and acquires the content data from the first network storage device based on the link information.
A network storage device including 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 that decrypts the encrypted link information is further provided.
The content data acquisition unit is a network storage device that acquires the content data based on the link information decoded by the decoding 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 the metadata of the small content data. The network storage device according to claim 4.
When the content data cannot be acquired based on the link information included in the metadata, the storage control unit stores the small content data in which the link information is deleted from the metadata in the storage area. Storage device. An electronic device connected to a second network storage device
Link information for accessing the 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 that acquires data including
A transmission unit that transmits at least the link information of the data to the second network storage device is provided.
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 to store in. 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 the metadata of the small content data. The electronic device according to claim 7.
It has a backup function that backs 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 reproduction unit that acquires the content data corresponding to the small content data from the second network storage device and reproduces 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 transmitter that transmits content data stored in a storage medium to the first network storage device, and
A link information acquisition unit that acquires link information for accessing the content data stored in the storage area of the first network storage device from the first network storage device.
A metadata editing unit that stores the link information in the metadata of the content data stored in the storage medium is provided .
The metadata editing unit, electronic devices you store the link information in the region of the metadata is not deleted from the content data when performing processing to reduce the data size for the content data. 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 that receives content data stored in the storage medium of the first electronic device from the first electronic device, and
A storage control unit that stores the content data in the storage area,
A link information generation unit that generates link information for accessing the content data stored in the storage area, and a link information generation unit.
An encryption unit that encrypts the link information,
A transmission unit that transmits the encrypted link information to the first electronic device is provided.
The encrypted link information is stored in a metadata area of the content data that is not deleted from the content data when the first electronic device performs a process of reducing the data size of the content data. Network storage device. Content that uses the first network storage device, the first electronic device connected to the first network storage device, the second network storage device, and the second electronic device connected to the second network storage device. It ’s 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 generates the link information. Send the link information to the first electronic device,
The second electronic device acquires 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.
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 content data. A content sharing method that stores content data in a storage area. For network storage devices connected to electronic devices
Link information for accessing the 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 receiving step of receiving the including data from the electronic device, and
A content data acquisition step of accessing the first network storage device and acquiring the content data from the first network storage device based on the link information.
An operation program of a network storage device for executing a storage control step for storing the content data acquired by the content data acquisition step in a storage area. For electronic devices connected to the second network storage device,
Link information for accessing the 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. Data acquisition steps to acquire and
A program for executing 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. The operation program of the electronic device to be stored in. For electronic devices connected to the first network storage device
A transmission step of transmitting the content data stored in the storage medium to the first network storage device, and
A link information acquisition step of 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, and
A metadata editing step of storing the link information in a metadata area of the content data that is not deleted from the content data when the data size of the content data stored in the storage medium is reduced. An operating program for electronic devices to execute. For network storage devices connected to the first electronic device,
A receiving step of receiving the content data stored in the storage medium of the first electronic device from the first electronic device, and
A storage control step for storing the content data in the storage area, and
A link information generation step for generating link information for accessing the content data stored in the storage area, and a link information generation step.
An encryption step that encrypts the link information and
A program for executing a transmission step of transmitting the encrypted link information to the first electronic device.
The encrypted link information is stored in a metadata area of the content data that is not deleted from the content data when the first electronic device performs a process of reducing the data size of the content data. Operation program of the network storage device.

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