JP6464878B2 - Content reproduction apparatus, content reproduction system, content reproduction method and program in content reproduction apparatus - Google Patents

Description

  The present invention relates to a content reproduction apparatus, a content reproduction system, a content reproduction method and a program in a content reproduction apparatus that can communicate with a storage device via a communication unit.

  With the spread of smartphones and tablet terminals, which are information processing devices having communication functions, an external server provided on the Internet is accessed from this information processing device, and music data, video data, etc. stored in the external server Technology for transferring the content data to the information processing apparatus and reproducing it on the information processing apparatus has been put into practical use. In addition, not only external servers provided on the Internet but also content data stored in a storage device such as a so-called NAS (Network Attached Storage) disposed in the user's home of the information processing apparatus is connected to the Internet. A technique has been proposed in which the information is accessed via the information processing apparatus, transferred to the information processing apparatus, and reproduced by the information processing apparatus (for example, see Patent Document 1).

  When accessing an external server etc. via the Internet and transferring content data from the external server etc., the communication between the information processing device and the external server etc. is encrypted, and third party wiretapping or fraud It is preferable to prevent access and tampering. As an example of such encrypted communication, in communication using HTTP (Hypertext Transfer Protocol), a secure communication protocol (HTTPS: Hypertext Transfer Protocol) using SSL / TLS (Secure Socket Layer / Transport Layer Security) protocol is used. Secure)) is known.

  In SSL / TLS, authentication, encryption, and falsification detection using a public key certificate are performed. A public key certificate is usually issued in a certificate authority and stored in an external server where content data is stored, and this public key certificate is provided when communicating with an information processing device. The validity is proved by digitally signing the key certificate. Since the public key issuance procedure by the certificate authority requires a predetermined amount of time, in communication using HTTPS between the storage device and the information processing device, the self-signed certificate issued by the storage device itself (self-issued) It is often provided to information processing devices. In the present specification, a self-signed certificate issued by itself may be simply referred to as a “self-signed certificate”.

JP 2014-178972 A JP 2009-38731 A

  Encrypted communication using a self-signed certificate does not always immediately trust the device that issued this self-signed certificate (in the above example, a storage device). Some application software rejects communication with a device that has issued a self-signed certificate. Therefore, there is a possibility that an information processing apparatus having such reproduction application software cannot transfer content data from a storage device in the house and reproduce it on the information processing apparatus.

  In order to perform communication between an embedded network device that does not support communication using HTTPS and a WWW (World Wide Web) server that performs communication using HTTPS, protocol conversion between HTTP and HTTPS is performed. Although a technique to perform has been proposed (see Patent Document 2), this technique is not based on the transfer of content data.

  The present invention has been made in view of the above-described problems, and enables transfer and reproduction of content data from various storage devices while ensuring security of communication with a storage device capable of transferring content data. An object of the present invention is to provide a content reproduction apparatus, a content reproduction system, a content reproduction method and a program in the content reproduction apparatus.

  The present invention is applied to a content reproduction apparatus that can communicate with a storage device having a specific network address via a communication unit. A content playback unit that requests the storage device to acquire content data stored in the storage device using the first protocol, accepts and plays back the content data sent from the storage device, and playback of the content data In response to the input signal instructing the content reproduction device itself, the content reproduction instruction unit instructs the content reproduction unit to acquire the content data using the network address indicating the content reproduction device itself as a specific network address, and the content reproduction unit identifies the content reproduction device itself. If acquisition of content data is requested to the network address indicated, the storage device is requested to acquire content data using a second protocol different from the first protocol, and the storage device is stored using the second protocol. The content data sent from the first By converting the Tokoru provided a relay unit which transmits the content reproduction unit, and solves at least one of the problems described above.

  When the content reproduction unit requests acquisition of content data to the network address indicating the content reproduction device itself, the relay unit uses the second protocol different from the first protocol to transmit the content data to the storage device. Requesting acquisition, the content data sent from the storage device using the second protocol is converted to the first protocol and sent to the content reproduction unit. Therefore, even if the content reproduction unit is configured to reject the transfer of content using the second protocol, the content can be transmitted from the storage device using the second protocol.

  Here, the first protocol is preferably a protocol that does not involve encryption, and the second protocol is preferably a protocol that involves encryption. Furthermore, it is preferable that the first protocol is an HTTP protocol and the second protocol is an HTTPS protocol.

  In addition, the storage device sends a self-signed certificate issued by the storage device itself during communication with encryption with the content playback device, and the content playback unit self-signs before accepting the content data. If the content data is not reproduced when the signature certificate is sent, the relay unit preferably approves the self-signed certificate when the self-signed certificate is sent from the storage device.

  Further, the content playback instruction unit instructs the content playback unit to acquire content data using a network address obtained by adding a specific network address of the storage device to a network address indicating the content playback device itself as a specific network address. Is preferred.

  Furthermore, it is preferable that the content reproduction unit reproduces the content data when receiving at least a part of the content data sent from the storage device. And it is preferable that a relay part hold | maintains at least one part of the content data sent from the memory | storage device in a memory | storage part.

  The present invention is also applied to a content reproduction system including a storage device having a specific network address and storing content data, and a content reproduction device capable of communicating with the storage device via a communication unit. The Then, the content reproduction device requests the storage device to acquire the content data using the first protocol, and receives and reproduces the content data sent from the storage device, and the reproduction of the content data In response to the input signal instructing the content reproduction device itself, the content reproduction instruction unit instructs the content reproduction unit to acquire the content data using the network address indicating the content reproduction device itself as a specific network address, and the content reproduction unit identifies the content reproduction device itself. If acquisition of content data is requested to the network address indicated, the storage device is requested to acquire content data using a second protocol different from the first protocol, and the storage device is stored using the second protocol. The content data sent from By the converted protocol provided a relay unit which transmits the content reproduction unit, and solves at least one of the problems described above.

  Furthermore, the present invention is applied to a content reproduction method in a content reproduction apparatus that can communicate with a storage device having a specific network address. Then, in response to an input signal instructing reproduction of the content data, the content reproduction apparatus itself is instructed to acquire the content data using the network address indicating the content reproduction apparatus itself as a specific network address, and based on the content data acquisition instruction A request for acquiring content data is sent to the network address indicating the content data using the first protocol, and a second different from the first protocol is obtained based on the request for acquiring the content data addressed to the network address indicating the content playback device itself. The content data sent from the storage device using the second protocol is converted to the first protocol and converted to the first protocol. To accept and play back The solves at least one of the problems described above.

  The present invention is applied to a program executed by a computer that can communicate with a storage device having a specific network address via a communication unit. When this program is executed by the computer, the computer requests the storage device to acquire content data stored in the storage device using the first protocol, and the content data sent from the storage device Content reproduction unit that accepts and reproduces content, and content reproduction that instructs the content reproduction unit to acquire content data with a network address indicating the content reproduction device itself as a specific network address in response to an input signal that instructs the reproduction of content data When the instruction unit and the content reproduction unit request acquisition of content data to the network address indicating the content reproduction device itself, the content data is transmitted to the storage device using a second protocol different from the first protocol. Request acquisition and second The content data sent from the storage device using a protocol, by function as a relay unit for transmitting and converting the first protocol to the content reproduction unit, and solves at least one of the problems described above.

  According to the present invention, a content playback apparatus and a content playback system that enable transfer and playback of content data from various storage devices while ensuring security of communication with a storage device capable of transferring content data. It is possible to provide a content reproduction method and program in the content reproduction apparatus.

It is a figure which shows schematic structure of the content reproduction system which is one Embodiment of this invention. It is a block diagram which shows schematic structure of the content reproduction apparatus which comprises the content reproduction system of one Embodiment. It is a block diagram which shows schematic structure of the memory | storage device which comprises the content reproduction system of one Embodiment. It is a block diagram which shows schematic structure of the server apparatus which comprises the content reproduction system of one Embodiment. It is a functional block diagram which shows the function structure of the content reproduction system of one Embodiment. It is a figure which shows an example of the registration table stored in the server apparatus of one Embodiment. It is a sequence diagram which shows an example of operation | movement of the content reproduction system of one Embodiment. It is a sequence diagram which shows an example of operation | movement of the content reproduction system of one Embodiment. It is a sequence diagram which shows the other example of operation | movement of the content reproduction system of one Embodiment. It is a sequence diagram which shows the other example of operation | movement of the content reproduction system of one Embodiment. It is a sequence diagram which shows the other example of operation | movement of the content reproduction system of one Embodiment. It is a sequence diagram which shows the other example of operation | movement of the content reproduction system of one Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
(One embodiment)
FIG. 1 is a diagram showing a schematic configuration of a content reproduction system according to an embodiment of the present invention. In this figure, a content reproduction system S according to an embodiment includes a content reproduction device 1 and a storage device 2.

  The content reproduction apparatus 1 is an information processing apparatus such as a so-called smartphone or tablet terminal, and can perform a voice call via the base station 4a and the mobile communication network 4, and further, via the mobile communication network 4, the Internet. 5 can be connected. The content reproduction apparatus 1 also has a function as a wireless LAN client, and can wirelessly communicate with other wireless LAN access points including the router 6 via the wireless LAN.

  The storage device 2 can be connected to a network such as NAS, for example, is connected to a router 6 via a wired LAN, and can be connected to the Internet 5 via this router 6. The router 6 also has a function as a wireless LAN access point, and can wirelessly communicate with other wireless terminals including the content reproduction apparatus 1 that is a wireless LAN client. The storage device 2 need not be directly connectable to a network, but is connected to an information processing device such as a PC (Personal Computer) via a general-purpose interface such as USB (Universal Serial Bus). What is necessary is just to be able to connect to the Internet 5 through 6 or the like. Specific configurations of the content reproduction device 1 and the storage device 2 will be described later.

  The server device 3 is connected to the Internet 5, and the storage device 2 and the server device 3 can communicate with each other via the Internet 5, and the content reproduction device 1 via the Internet 5 and the mobile communication network 4. Can communicate with.

(Configuration of content reproduction apparatus according to one embodiment)
FIG. 2 is a block diagram showing a schematic configuration of the content reproduction apparatus 1 constituting the content reproduction system S of the embodiment. In FIG. 2, a content reproduction apparatus 1 includes a CPU (Central Processing Unit) 10, a ROM (Read Only Memory) 11, a RAM (Random Access Memory) 12, a display device 13, an internal storage unit 14, a mobile communication module 150, an audio. Interface (I / F) 151, microphone 152, speaker 153, antenna 154, input device 16 and wireless LAN interface 17, CPU 10, ROM 11, RAM 12, display device 13, internal storage unit 14, mobile communication module 150, input The device 16 and the wireless LAN interface 17 are connected by a common bus.

  The CPU 10 controls the operation of the entire content reproduction apparatus 1 by being executed after a program such as firmware stored in the ROM 11 is expanded in the RAM 12. The CPU 10 also operates as each functional unit as shown in FIG. 5 by executing a program stored in the ROM 11. The operation of each functional unit shown in FIG. 5 will be described later. The ROM 11 stores programs such as the above-described firmware and various setting data. The RAM 12 operates as a work memory of the content reproduction apparatus 1 and temporarily stores various programs and data.

  The display device 13 includes a liquid crystal panel 131 and a liquid crystal driver 130 that drives the liquid crystal panel 131. The liquid crystal panel 131 is provided with its display surface exposed on the surface of the content reproduction apparatus 1. When the data constituting the display screen is supplied from the CPU 10 to the liquid crystal driver 130, the liquid crystal driver 130 drives the liquid crystal panel 131 to display a desired display screen on the display surface of the liquid crystal panel 131.

  The internal storage unit 14 includes an internal storage 141 and an internal storage interface (I / F) 140. The internal storage 141 is a non-volatile semiconductor memory such as a flash memory, and stores application programs and the like used in the content reproduction apparatus 1. When there is a data read / write command to the internal storage 141, the internal storage interface 140 controls the entire internal storage 141, performs data read / write control, and outputs the read data. . The internal storage 141 may be a detachable nonvolatile memory card such as a microSD. In this case, the internal storage interface 140 further includes a memory card slot in which the memory card is inserted.

  The mobile communication module 150 performs mobile radio communication with the mobile communication network 4 via the antenna 154 in accordance with, for example, the IMT (International Mobile Telecommunication) -2000 standard. That is, the mobile communication module 150 causes the audio signal obtained by decoding the radio wave received from the base station 4 a of the mobile communication network 4 to be generated from the speaker 153 via the audio interface 151, and via the audio interface 151. Then, the sound collected by the microphone 152 is encoded and transmitted as a radio wave to the base station 4 a of the mobile communication network 4 via the antenna 154. The mobile communication module 150 performs data communication by transmitting and receiving packetized data to and from the base station 4a of the mobile communication network 4. Note that the standards supported by the mobile communication module 150 include at least one of mobile communication standards established from the past to the present. As an example, 3G / HSDPA (3rd Generation / High-Speed Downlink Packet Access) , LTE (Long Term Evolution), and WiMAX (Worldwide Interoperability for Microwave Access). Furthermore, standards that are currently being formulated and will be formulated in the future can be suitably applied to the standards that the mobile communication module 150 supports. Also, voice may be transmitted and received as packetized data such as VoLTE (Voice over Long Term Evolution).

  The input device 16 includes an input interface (I / F) 160, an input instruction unit 161, and a touch panel 162.

  An input instruction unit 161 is connected to the input interface 160, and receives an input signal input by the user operating the input instruction unit 161. Examples of the input instruction unit 161 include a function button for performing a setting input start operation instruction. In the present embodiment, the touch panel 162 is provided so as to be superimposed on the upper surface of the display surface of the liquid crystal panel 131 and has substantially the same size as the display surface of the liquid crystal panel 131. When the user touches the surface of the touch panel 162, that is, when a specific position on the surface of the touch panel 162 is touched by the user, the specific position on the surface of the touch panel 162 is detected as a two-dimensional coordinate position. It is output via the interface 160.

  The wireless LAN interface 17 performs wireless communication with the router 6 serving as a wireless access point in accordance with, for example, the IEEE (The Institute of Electrical and Electronics Engineers) 802.11 standard. The wireless LAN interface 17 can operate the content reproduction apparatus 1 as a wireless LAN client.

(Schematic configuration of storage device according to one embodiment)
FIG. 3 is a block diagram showing a schematic configuration of the storage device 2 used in the content reproduction system S of the present embodiment. 3, the storage device 2 includes a CPU 20, ROM 21, RAM 22, a wired LAN interface (I / F) 23, and an HDD unit 24. The CPU 20, ROM 21, RAM 22, wired LAN interface 23, and HDD unit 24 are common buses. Connected by.

  The CPU 20 is executed after a program such as firmware stored in the ROM 21 is expanded in the RAM 22, thereby controlling the operation of the entire storage device 2 and executing the functions shown in the functional units shown in FIG. 5. To do. Each functional unit shown in FIG. 5 will be described later. The ROM 21 stores a program such as the firmware described above. The RAM 22 operates as a work memory of the storage device 2 and temporarily stores various programs and data.

  The wired LAN interface 23 performs wired communication with the Internet 5 in accordance with, for example, the IEEE 802.3 standard.

  The HDD unit 24 includes an HDD 241 and an HDD interface (I / F) 240. The HDD 241 includes a disk that is a recording medium, a rotating unit that rotates the disk, and a head unit that reads / writes data from / to the disk (all not shown). When there is a data read / write command to the HDD 241, the HDD interface 240 controls the entire HDD 241, performs data read / write control, and outputs the read data. The HDD 241 stores content data 70 and a self-signed certificate 71.

(Schematic configuration of server device of one embodiment)
FIG. 4 is a block diagram showing a schematic configuration of the server device 3 used in the content reproduction system S of the present embodiment. 3, the server device 3 includes a CPU 30, a ROM 31, a RAM 32, a wired LAN interface (I / F) 33, and an HDD unit 34. The CPU 30, the ROM 31, the RAM 32, the wired LAN interface 33, and the HDD unit 34 are common buses. Connected by.

  The CPU 30 executes a program such as firmware stored in the ROM 31 after being expanded in the RAM 32, thereby controlling the operation of the entire server device 3 and executing the functions shown in the functional units shown in FIG. To do. Each functional unit shown in FIG. 5 will be described later. The ROM 31 stores a program such as the firmware described above. The RAM 32 operates as a work memory of the server device 3 and temporarily stores various programs and data.

  The wired LAN interface 33 performs wired communication with the Internet 5 in accordance with, for example, the IEEE 802.3 standard.

  The HDD unit 34 includes an HDD 341 and an HDD interface (I / F) 340. The HDD 341 includes a disk that is a recording medium, a rotating unit that rotates the disk, and a head unit that reads / writes data from / to the disk (all not shown). When there is a data read / write command to the HDD 341, the HDD interface 340 controls the entire HDD 341, performs data read / write control, and outputs the read data. The HDD 341 stores a registration table 72 that is a registration result of the content reproduction device 1 and the storage device 2. Details of the registration table 72 will be described later.

(Functional configuration of content reproduction system of one embodiment)
FIG. 5 is a functional block diagram showing a functional configuration of the content reproduction system S of one embodiment. In FIG. 5, the content reproduction apparatus 1 constituting the content reproduction system S of the present embodiment includes a control unit 40, a storage unit 41, an input unit 42, an output unit 43, and a communication unit 44. The control unit 40 controls the entire content reproduction apparatus 1 and includes a content reproduction unit 45, a content reproduction instruction unit 46, and a relay unit 47.

  The content reproduction unit 45 requests the device storing the content data 70 such as the storage device 2 to acquire the content data 70, and accepts and reproduces the content data 70 sent from the storage device 2 or the like. More specifically, the content playback unit 45 sets the network address of the storage device 2 as a specific network address from which the content data 70 is acquired, and uses the first protocol for the storage device 2 to store the storage device 2. The content data 70 stored in the storage device 2 is requested to be acquired, and the content data 70 sent from the storage device 2 is received and reproduced. Here, the “specific network address” includes not only a fixed network address but also a network address assigned by a dynamic domain name system (DDNS) or the like when requesting the storage device 2 to acquire the content data 70. Including.

  The method of reproducing the content data 70 by the content reproduction unit 45 is arbitrary. As an example, the content data 70 is transmitted in units of files from the storage device 2 or the like, and the content data 70 in units of files, in other words, the content file is transferred to the content reproduction unit If 45 is accepted, the content file (content data 70) may be reproduced. That is, the content data 70 transferred from the storage device 2 in the file transfer format may be reproduced. Preferably, the content reproduction unit 45 reproduces the content data 70 upon receiving at least a part of the content data 70 sent from the storage device 2. More specifically, when the content reproduction unit 45 accepts the content data 70 in the streaming format from the storage device 2 or the like, or in the progressive download format, in other words, accepts at least a part of the content data 70 in the file format, the content data 70 is played back.

  The content reproduction instruction unit 46 sends content to the content reproduction unit 45 in accordance with a reproduction instruction input signal output by the input unit 42 or the like based on the reproduction instruction of the content data 70 input by the user via the input unit 42 or the like. The acquisition of the data 70 is instructed.

  Preferably, the content playback instruction unit 46 sets the network address indicating the content playback device 1 itself to the content playback unit 45 as a specific network address of the storage device 2 in response to an input signal instructing playback of the content data 70. The acquisition of the content data 70 is instructed. That is, the content reproduction instruction unit 46 instructs a network address indicating the content reproduction device 1 itself as a destination for requesting acquisition of the content data 70, instead of a specific network address included in the storage device 2, and sets the network address to this network address. The acquisition of the content data 70 is instructed.

  The specific network address that the storage device 2 has here may be not only the global IP address when the storage device 2 itself has a so-called global IP address, but also the global IP address that the router 6 has, In other words, the storage device 2 need not have a global IP address. Further, the content reproduction instruction unit 46 itself does not need to acquire the global IP address of the storage device 2 or the router 6 in advance, and may be acquired by making an inquiry to the server device 3 described later. Further, the server device 3 may operate as a so-called relay server, and the server device 3 may be appropriately relayed and connected to the storage device 2 by accessing the server device 3, and the storage device 2 in this case The specific network address possessed by is the global IP address of the server device 3.

  Further, the network address indicating the content reproduction apparatus 1 itself is an address called a so-called loopback address as an example. The loopback address is 127.0.0.1 as an example, or is indicated by localhost in the HTTP protocol. In particular, in the present embodiment, a specific port number, for example, port number 8080 is also used as a loopback address indicating the content reproduction apparatus 1 itself, in addition to the above address or protocol.

  Preferably, the content reproduction instruction unit 46 sends the content data 70 to the content reproduction unit 45 as a specific network address by adding a network address obtained by adding the specific network address of the storage device 2 to the network address indicating the content reproduction device 1 itself. The acquisition of is instructed. Preferably, the relay unit 47 described in detail later requests acquisition of the content data 70 from a specific network address included in the storage device 2 included in the content data 70 acquisition request from the content reproduction unit 45.

  When the content reproduction unit 45 requests acquisition of the content data 70 addressed to the network address indicating the content reproduction device 1 itself, the relay unit 47 uses the second protocol different from the first protocol to store in the storage device 2. The content data 70 is requested to be acquired, and the content data 70 sent from the storage device 2 using the second protocol is converted into the first protocol and sent to the content playback unit 45.

  Preferably, the first protocol is a protocol without encryption, and the second protocol is a protocol with encryption. More preferably, the first protocol is an HTTP protocol and the second protocol is an HTTPS protocol. Thereby, the security of communication between the content reproduction apparatus 1 and the storage device 2 can be ensured.

  Further, preferably, the relay unit 47 causes the storage unit 41 to hold at least a part of the content data 70 sent from the storage device 2. More specifically, the storage unit 41 includes a cache memory, and at least a part of the content data 70 sent from the storage device 2 is held in the cache memory, and the content data 70 held in the cache memory is stored in the content playback device 1. To send. Here, the relay unit 47 performs a protocol conversion operation from the second protocol to the first protocol on the content data 70 sent from the storage device 2, and stores the data in the cache memory of the storage unit 41. Either of the protocol conversion operations may be performed first.

  In this way, by holding at least a part of the content data 70 sent from the storage device 2 in the storage unit 41, the communication operation between the relay unit 47 and the storage device 2, and the relay unit 47 and the content reproduction unit. 45, the operation of accepting the content data 70 from the storage device 2 and the delivery operation of the content data 70 to the content reproduction unit 45 can be performed smoothly. There is an advantage that when the same content data 70 is reproduced again, it is not necessary to request the storage device 2 to send the content data 70 again. Note that the cache memory provided in the storage unit 41 may be either a volatile memory such as the RAM 12 or a nonvolatile memory such as the internal storage 141, or these may be used in combination.

  Here, the storage device 2 sends a self-signed certificate 71 issued by the storage device 2 itself during communication with encryption with the content reproduction device 1, and the content reproduction unit 45 performs content data If the self-signed certificate 71 is sent from the storage device 2 prior to accepting 70, the relay unit 47 preferably approves the self-signed certificate 71 when the content data 70 is not reproduced. When the relay unit 47 approves the self-signed certificate 71 from the storage device 2, communication with encryption between the storage device 2 and the relay unit 47 is established. As a result, content data from the storage device 2 is established. 70 deliveries can be accepted.

  The storage unit 41 stores at least temporarily various data and programs necessary for the operation of the control unit 40 and the like. In addition, at least a part of the content data 70 sent from the storage device 2 is stored at least temporarily in the storage unit 41 as necessary.

  The input unit 42 accepts an instruction or the like from the user input to the content reproduction apparatus 1, generates an input signal based on the accepted instruction or the like, and outputs the input signal to the control unit 40 or the like. The output unit 43 reproduces the content data 70 for the user of the content reproduction device 1 based on the content reproduction signal generated by the control unit 40 or the like. The communication unit 44 performs wireless communication with the base station 4 a via the mobile communication network 4 and transmits / receives data to / from the Internet 5.

On the other hand, the storage device 2 constituting the content reproduction system S of the present embodiment includes a control unit 50, a storage unit 51, and a communication unit 52. The control unit 50 controls the entire storage device 2 and includes a content sending unit 53.
The content transmission unit 53 searches the content data 70 stored in the storage unit 51 based on a transmission request for the content data 70 from an external device that can communicate with the storage device 2 including the content reproduction device 1. The content data 70 is transmitted via the communication unit 52.

  The storage unit 51 stores at least temporarily various data and programs necessary for the operation of the control unit 50 and the like. The storage unit 51 also stores content data 70 and a self-signed certificate 71. The content data 70 is data for reproducing content such as music data and moving image data as an example. In FIG. 5, only the single content data 70 is illustrated, but a plurality of content data 70 may be stored in the storage unit 51. The self-signed certificate 71 is sent to the external device when the communication unit 52 communicates with another external device including the storage device 2 using a secure protocol.

  The communication unit 52 transmits / receives data to / from the Internet 5. In addition, the communication unit 52 has a function of communicating with an external device such as the content reproduction apparatus 1 connected via the Internet 5 using a secure protocol with encryption. Sends a self-signed certificate 71 to this external device when communicating using a secure protocol.

  Furthermore, the server device 3 constituting the content reproduction system S of the present embodiment includes a control unit 60, a storage unit 61, and a communication unit 62. The control unit 60 controls the entire server device 3 and includes a registration processing unit 63.

  When at least a part of the first registration information sent from the content reproduction device 1 and the second registration information sent from the storage device 2 match, the registration processing unit 63 matches the content reproduction device 1 and the storage device 2. Are registered in a registration table 72 in the storage unit 61 described later. The first registration information and the second registration information may be any information that can uniquely identify the storage device 2. For example, the second registration information is a MAC (Media Access Control) address of the storage device 2. The first registration information is a part of the MAC address of the storage device 2.

  In addition, when the registration unit 63 registers the content reproduction device 1 and the storage device 2 as a pair, the registration processing unit 63 also registers authentication information used as authentication when communication between the content reproduction device 1 and the storage device 2 is performed. Store in table 72. The authentication information is, for example, a set of an ID and a password, and is preferably input by the user of the content reproduction device 1 through the input unit 42 and transmitted from the content reproduction device 1.

  Further, the registration processing unit 63 performs an authentication operation using the authentication information sent from the content reproduction apparatus 1 and the authentication information registered in the registration table 72. If the authentication is successful, the registration processing unit 63 is stored in the registration table 72. Then, the specific network address of the storage device 2 is notified to the content reproduction device 1.

  The communication unit 62 transmits / receives data to / from the Internet 5. The storage unit 61 stores various data and programs necessary for the operation of the control unit 60 and the like at least temporarily. In addition, the storage unit 61 stores a registration table 72 that is a result of the registration processing unit 63 registering the storage device 2 and the content reproduction device 1 as a pair.

  An overview of the registration table 72 stored in the storage unit 61 of the server device 3 will be described with reference to FIG. The registration table 72 includes a number field 72a, an ID (Identification) field 72b, a password field 72c, a MAC address field 72d, an IP address field 72e, and a local address field 72f.

  Each cell in the number column 72a stores a number for individually identifying a set of the content reproduction device 1 and the storage device 2. In each cell of the ID column 72b, an ID set by a user who uses the content reproduction device 1 and the storage device 2 is stored. In the example shown in FIG. 6, the user-owned mail address set by the user is stored in the ID column 72b. In each cell of the password column 72c, a password set by the user is stored. Each cell in the MAC address column 72d stores the MAC address of the storage device 2 owned by the user.

  In each cell of the IP address column 72e, an IP address for specifying the storage device 2 in the Internet 5 is stored. In the present embodiment, the storage device 2 and the server device 3 are connected via a router 6 and the Internet 5, and the router 6 usually has a DHCP (Dynamic Host Configuration Protocol) server function, a global IP address, and a local IP address. In many cases, the IP address stored in the IP address column 72e is the global IP address of the router 6. In this specification, description will be made assuming that the router 6 has a DHCP server function and a network address translation function. Alternatively, when the storage device 2 has a fixed and unique global IP address, the IP address stored in the IP address column 72 e is the global IP address of the storage device 2. Furthermore, it may be an IP address set in the storage device 2 based on IPv6.

  Each cell in the local address column 72f stores a local IP address assigned to the storage device 2 by the router 6 as a DHCP server. When the storage device 2 has a unique and fixed global IP address as described above, each cell in the local address field 72f may be blank, or the same contents as the IP address field 72e may be stored. May be described.

  In each column of the registration table 72 (one row in which cells are arranged in the horizontal direction in FIG. 6), data for specifying the content reproduction device 1 and the storage device 2 registered as a set is stored. .

  The function of accepting or acquiring input of various information to be registered in each column of the registration table 72 and sending it to the server device 3 is the control unit 40 of each of the content reproduction device 1 and the storage device 2. 50 has.

  In the above configuration, the control unit 40 and the content playback unit 45, the content playback instruction unit 46, and the relay unit 47 that constitute the control unit 40 are mainly configured by the CPU 10, and the storage unit 41 is mainly configured by the ROM 11, the RAM 12, and the internal storage unit. 14, the input unit 42 is mainly configured by the input device 16, the output unit 43 is mainly configured by the display device 13 and the speaker 153, and the communication unit 44 is mainly configured by the mobile communication module 150, the voice interface. 151, a microphone 152, a speaker 153, an antenna 154, and a wireless LAN interface 17.

  Further, the control unit 50 and the content sending unit 53 constituting the control unit 50 are mainly configured by the CPU 20, the storage unit 51 is mainly configured by the ROM 21, the RAM 22, and the HDD unit 24, and the communication unit 52 is mainly wired. The LAN interface 23 is used.

  Further, the control unit 60 and the registration processing unit 63 constituting the control unit 60 are mainly configured by the CPU 30, the storage unit 61 is mainly configured by the ROM 31, the RAM 32, and the HDD unit 34, and the communication unit 62 is mainly wired. The LAN interface 33 is used. The operation of each functional unit shown in FIG. 5 will be described in detail later.

(Operation of Content Playback System of One Embodiment)
Next, the operation of the content reproduction system S of the present embodiment will be described with reference to the sequence diagrams of FIGS. 7 to 8 are sequence diagrams for explaining an example of an operation for transferring the content data 70 stored in the storage device 2 in the content reproduction system S of the present embodiment to the content reproduction device 1.

  Prior to describing the operations in FIGS. 7 to 8, operations when the content reproduction apparatus 1 accesses the storage device 2 will be described. As described above, the content reproduction apparatus 1 of the present embodiment has a communication function, and the user accesses the storage device 2 from the content reproduction apparatus 1 via the mobile communication network 4, the Internet 5, and the server apparatus 3.

  At this time, in the content reproduction system S of the present embodiment, since the router 6 has the DHCP server function and the network address conversion function as described above, only the local IP address is given to the storage device 2 from the router 6, When accessing the server device 3 from the storage device 2, the server device 3 stops knowing the global IP address of the router 6. Further, when the network configuration is changed in a local network including the router 6 and the storage device 2, there is a possibility that the local IP address assigned to the storage device 2 is also changed. Therefore, when accessing the storage device 2 from the server device 3, it is preferable that the server device 3 knows in advance the global IP address of the router 6 and the local IP address of the storage device 2.

  For this reason, in the content reproduction system S of this embodiment, when the control unit 50 of the storage device 2 counts for a certain time (for example, 30 minutes), the control unit 50 determines the global IP address of the router 6 and the local IP address of the storage device 2. Is transmitted to the server device 3 via the communication unit 52. Upon receiving the polling signal, the registration processing unit 63 of the server device 3 stores the global IP address of the router 6 and the local IP address of the storage device 2 in the IP address column 72e and the local address column 72f of the registration table 72, respectively. And a polling signal is periodically transmitted to the server apparatus 3 from the memory | storage device 2 by performing the above-mentioned procedure for every fixed time mentioned above.

  A user who desires to reproduce the content data 70 stored in the storage device 2 on the content reproduction device 1 operates the content reproduction device 1 to instruct access to the storage device 2.

  Based on the access command from the user, the control unit 40 of the content reproduction device 1 transmits access request information for the storage device 2 to the server device 3. The control unit 60 of the server device 3 that has received the access request information to the storage device 2 transmits information requesting input of an ID and password to the content reproduction device 1 that has transmitted the access request information.

  The storage unit 41 of the content reproduction device 1 stores an ID and password for accessing the storage device 2 in advance by the user, and the content reproduction device 1 that has received the ID and password input request information from the server device 3. The control unit 40 transmits the ID and password stored in the storage unit 41 to the server device 3.

  The registration processing unit 63 of the server device 3 that has received the ID and password from the content playback device 1 searches the ID field 72b of the registration table 72 for the ID transmitted from the content playback device 1, and stores the ID in the searched ID field 72b. The global IP address described in the IP address column 72e in the column and the local IP address described in the local address column 72f are extracted, and these global IP address and local IP address are provided to the content reproduction apparatus 1. Then, the content reproduction device 1 transmits access request information to the storage device 2 specified by these global IP address and local IP address, and uses the ID and password stored in the storage unit 41 to store the storage device 2. Request authentication processing.

  In this way, the content reproduction device 1 can access the content data 70 stored in the storage unit 61 of the storage device 2 and perform processing such as reproduction in the content reproduction device 1.

  Returning to the description of FIG. 7, in step S <b> 1 of FIG. 7, the user operates the input unit 42 of the content reproduction device 1 to instruct acquisition of the list of content data 70 stored in the storage device 2. In step S <b> 2, based on the list acquisition instruction in step S <b> 1, the control unit 40 of the content reproduction device 1 requests the storage device 2 to acquire a list via the communication unit 44. In step S3, the control unit 50 of the storage device 2 creates a list of content data 70 stored in the storage unit 51 based on the list acquisition request from the content reproduction device 1 in step S2, and communicates this list. The content is sent to the content playback apparatus 1 via the unit 52.

  In step S4, the control unit 40 of the content reproduction apparatus 1 displays the list sent from the storage device 2 in step S3 via the output unit 43. In step S <b> 5, the user operates the input unit 42 of the content playback device 1 to specify the specific content data 70 stored in the storage device 2 and instruct the playback of the specified content data 70.

In step S6, based on the reproduction instruction of the content data 70 from the user in step S5, the content reproduction instruction unit 46 designates an address indicating the content reproduction device 1 itself as an address indicating the storage device 2, and the content reproduction unit 45 is instructed to acquire content data 70. An address as a destination at which the content reproduction instruction unit 46 instructs the content reproduction unit 45 to acquire the content data 70 is indicated by the following URL as an example.

http: // localhost: 8080 / hogehoge / rpc / cat / share / movie.MOV

Here, localhost is a character string indicating the loopback address described above, 8080 is a port number, and the subsequent character string is a character string indicating the destination of the content data 70 of the storage device 2 that actually requests acquisition It is.

  In step S7, the content reproduction unit 45 requests acquisition of the content data 70 using the URL sent from the content reproduction instruction unit 46 in step S6. In this case, since the URL indicating the address instructed to be acquired from the content playback instruction unit 46 starts with http, the content playback unit 45 uses the HTTP protocol and, for example, designates in byte units in the request header of the HTTP GET command. Thus, the acquisition of a part of the content data 70 is requested.

In step S8, the relay unit 47 detects that the content playback unit 45 has requested acquisition of the content data 70 using the loopback address, acquires the URL from which the content data 70 is acquired, and localhost and The character string after the port number is extracted, the address of the storage device 2 that should actually request acquisition of the content data 70 is taken out, and further converted into a URL using the HTTPS protocol. The URL after conversion is the above example

https: //hogehoge/rpc/cat/share/movie.MOV

It is. In step S9, the relay unit 47 uses the URL converted in step S8 to send the acquisition request for the content data 70 specified by the URL to the storage device 2 using the HTTPS protocol.

  In step S10, the communication unit 52 of the storage device 2 stores the self-signed certificate stored in the storage unit 51 in response to the acquisition request for the content data 70 sent from the relay unit 47 of the content reproduction device 1 in step S9. 71 is sent out and the verification is requested. In step S 11, the relay unit 47 of the content reproduction apparatus 1 accepts the self-signed certificate 71 sent from the storage device 2, and replies that it approves the verification request for the self-signed certificate 71.

  In step S12, in response to the approval of the self-signed certificate 71 by the content reproduction device 1, the content sending unit 53 of the storage device 2 sends the content data 70 requested for acquisition in step S9 via the communication unit 52. And send it out. In step S13, the content data 70 sent from the storage device 2 by the HTTPS protocol in step S12 is accepted. In step S14, the relay unit 47 sends the content data 70 to the content reproduction unit 45 by the HTTP protocol. At this time, the communication session between the storage device 2 and the relay unit 47 and the communication session between the relay unit 47 and the content reproduction unit 45 are independent and operate asynchronously.

  In step S 15, the content reproduction unit 45 generates a signal for reproducing the content data 70 based on the content data 70 transmitted from the relay unit 47 using the HTTP protocol, and outputs the signal to the output unit 43. The output unit 43 reproduces the content data 70 based on the content reproduction signal sent from the content reproduction unit 45.

  In step S16, the last content data 70 is sent from the storage device 2, and in step S17, the relay unit 47 of the content reproduction device 1 ends the communication with the storage device 2. In step S18, the relay unit 47 sends the last content data 70 to the content reproduction unit 45. In step S19, the reproduction of the content data 70 in the content reproduction unit 45 ends. In step S20, the content reproduction unit 45 stores the storage device. 2 is instructed to end the communication with the relay unit 47, and the relay unit 47 ends the communication with the content reproduction unit 45 in step S21.

  Next, FIG. 9 to FIG. 10 are sequence diagrams for explaining an example of the operation when the content reproduction unit 45 interrupts the reproduction of the content data 70 in the content reproduction system S of the present embodiment.

  The operation from step S30 in FIG. 9 to step S44 in FIG. 10 is the same as the operation from step S1 in FIG. 7 to step S15 in FIG. In step S45, the user of the content playback apparatus 1 operates the input unit 42 to instruct the end of playback of the content data 70 currently being played back. Note that the term “reproduction end” here includes a case where the user operates a so-called seek bar to instruct reproduction at a different reproduction position.

  In step S46, based on the reproduction end instruction of the content data 70 from the user in step S33, the content reproduction instruction unit 46 instructs the content reproduction unit 45 to end reproduction of the content data 70, and in step S47, the content reproduction is performed. Based on the instruction to end the reproduction of the content data 70 from the instruction unit 46, the content reproduction unit 45 ends the reproduction of the content data 70.

  In step S48, the relay unit 47 detects that the content data 70 transmitted from the storage device 2 cannot be transmitted to the content reproduction unit 45 (reproduction of the content data 70 in the content reproduction unit 45 has ended in step S35). Then, the communication with the content reproduction unit 45 is terminated. Next, in step S49, the relay unit 47 instructs the storage device 2 to end sending the content data 70, and in step S50, the relay unit 47 ends communication with the storage device 2.

  Furthermore, FIGS. 11 to 12 are sequence diagrams for explaining an example of the operation when the content data 70 is completely transmitted from the storage device 2 due to a communication error or the like in the content reproduction system S of the present embodiment. .

  The operations from step S60 in FIG. 11 to step S74 in FIG. 12 are the same as the operations from step S1 in FIG. 7 to step S15 in FIG. In step S75, a communication error or the like occurs between the storage device 2 and the relay unit 47 of the content reproduction device 1. As a result, the relay unit 47 ends communication with the storage device 2 in step S76. The communication error or the like in step S75 means that the communication between the content reproduction device 1 and the Internet 5 is offline because the communication between the mobile communication network 4 and the content reproduction device 1 is interrupted. In addition, the occurrence of an error on the HTTP (S) protocol is included.

  In step S77, the relay unit 47 forcibly terminates communication with the content reproduction unit 45. As a result, in step S78, reproduction of the content data 70 in the content reproduction unit 45 results in an error. Terminates communication with the relay unit 47.

(Effect of the content reproduction system of one embodiment)
As described above, in the content reproduction system S of the present embodiment, the relay unit 47 operates as a proxy server that mediates between the content reproduction unit 45 and the storage device 2, and converts between the HTTP protocol and the HPPTS protocol. Even if the content reproducing unit 45 is configured to reject communication with the storage device 2 using the HTTPS protocol with the self-signed certificate 71, the content reproducing device 1 reproduces the content data 70. The action can be performed. Accordingly, it is possible to transfer and play back the content data 70 from various storage devices 2 while ensuring the security of communication with the storage device 2 capable of transferring the content data 70.

(Modification)
It should be noted that the details of the content playback apparatus and the like of the present invention are not limited to the above-described embodiment, and various modifications can be made. As an example, in the above-described embodiment, the communication between the content reproduction unit 45 and the relay unit 47 is performed using the HTTP protocol, and the communication between the relay unit 47 and the storage device 2 is performed using the HTTPS protocol. The protocol in each communication is not limited to HTTP and HTTPS.

  In one embodiment, communication between the content playback device 1 and the storage device 2 is performed using the server device 3. However, the storage device 2 has a fixed global IP address, and the content playback device 1 is a storage device. When the fixed global IP address of 2 is known, the content reproduction device 1 and the storage device 2 can directly communicate with each other. Further, the server device 3 may be a relay server that relays communication between the content reproduction device 1 and the storage device 2, or may be a server that realizes DDNS.

  Furthermore, in the above-described embodiment, both the storage device 2 and the server device 3 include the HDD units 24 and 34. However, any storage medium that can store the content data 70 or the like at least temporarily is suitable. It can be adopted.

  In the above-described embodiment, the program for operating the content reproduction device 1 and the storage device 2 is stored and provided in the ROMs 11 and 21 and the like, but the program is stored using an optical disk drive (not shown) or the like. A recording medium such as a DVD (Digital Versatile Disc), a USB external storage device, a memory card, or the like may be connected, and the program may be read from the DVD or the like into the content reproduction device 1 or the storage device 2 for operation. Alternatively, a program may be stored in the server device 3 on the Internet 5, and this program may be read into the content reproduction device 1 and the storage device 2 for operation. Furthermore, in the above-described embodiment, the content reproduction device 1 and the storage device 2 are configured by a plurality of hardware elements. However, the CPUs 10 and 20 realize the operations of some of these hardware elements by the operation of the program. Is also possible.

S Content Playback System 1 Content Playback Device 2 Storage Device 3 Server Device 4 Mobile Communication Network 5 Internet 6 Router 10, 20, 30 CPU
11, 21, 31 ROM
12, 22, 32 RAM
13 Display device 14 Internal storage unit 16 Input device 17 Wireless LAN interface 23, 33 Wired LAN interface 24, 34 HDD unit 40, 50, 60 Control unit 41, 51, 61 Storage unit 42 Input unit 43 Output unit 44, 52, 62 Communication unit 45 Content reproduction unit 46 Content reproduction instruction unit 47 Relay unit 53 Content transmission unit 63 Registration processing unit 70 Content data 71 Self-signed certificate 72 Registration table 150 Mobile communication module

Claims (14)

A content reproduction device capable of communicating with a storage device having a specific network address via a communication unit,
The network address of the storage device or the network address indicating the content reproduction device itself is requested to acquire content data stored in the storage device using a first protocol, and the content data sent from the storage device is sent A content playback unit for receiving and playing back content data;
A content reproduction instruction unit that instructs the content reproduction unit to acquire the content data from a network address indicating the content reproduction device itself in response to an input signal instructing reproduction of the content data;
When the content reproduction unit requests acquisition of the content data to the network address indicating the content reproduction device itself, the content reproduction unit uses the second protocol different from the first protocol to the storage device A relay unit that requests acquisition of content data, converts the content data sent from the storage device using the second protocol into the first protocol, and sends the content data to the content reproduction unit;
A content playback apparatus comprising:   2. The content reproducing apparatus according to claim 1, wherein the first protocol is a protocol that does not involve encryption, and the second protocol is a protocol that involves encryption.   The content reproduction apparatus according to claim 2, wherein the first protocol is an HTTP protocol, and the second protocol is an HTTPS protocol.   The content reproduction instructing section uses the network address obtained by adding the specific network address of the storage device to the network address indicating the content reproduction apparatus itself as the specific network address to the content reproduction section. 4. The content reproduction apparatus according to claim 1, wherein the content reproduction apparatus instructs acquisition of the content.   The content reproduction apparatus according to claim 1, wherein the content reproduction unit reproduces the content data when receiving at least a part of the content data transmitted from the storage device.   The content reproduction apparatus according to claim 5, wherein the relay unit causes the storage unit to hold at least a part of the content data transmitted from the storage device. A content playback system comprising a storage device having a specific network address and storing content data, and a content playback device capable of communicating with the storage device via a communication unit,
The content playback device
The network address of the storage device or the network address indicating the content reproduction device itself is requested to acquire content data stored in the storage device using a first protocol, and the content data sent from the storage device is sent A content playback unit for receiving and playing back content data;
A content reproduction instruction unit that instructs the content reproduction unit to acquire the content data from a network address indicating the content reproduction device itself in response to an input signal instructing reproduction of the content data;
When the content reproduction unit requests acquisition of the content data to the network address indicating the content reproduction device itself, the content reproduction unit uses the second protocol different from the first protocol to the storage device A relay unit that requests acquisition of content data, converts the content data sent from the storage device using the second protocol to the first protocol, and sends the content data to the content playback unit; The content reproduction system characterized by this. A content reproduction method in a content reproduction apparatus capable of communicating with a storage device having a specific network address,
The content reproduction apparatus includes a content reproduction unit, a content reproduction instruction unit, and a relay unit,
The content reproduction instruction unit instructs the content reproduction unit to acquire the content data using a network address indicating the content reproduction device itself as the specific network address in response to an input signal instructing reproduction of content data.
The content playback unit requests acquisition of the content data using a first protocol addressed to the network address indicating the content playback device itself based on the content data acquisition instruction,
Based on the content data acquisition request addressed to the network address indicating the content reproduction device itself , the relay unit uses the second protocol different from the first protocol to the storage device. Requesting acquisition of the content data, converting the content data sent from the storage device using the second protocol into the first protocol;
The content reproducing unit, the content playback method in the content reproduction apparatus characterized by reproducing accept the content data converted to the first protocol by the relay unit. A program executed by a computer capable of communicating with a storage device having a specific network address via a communication unit,
When this program is executed by the computer, the content data stored in the storage device using the first protocol with respect to the network address of the storage device or the network address indicating the content reproduction device itself A content playback unit that requests and acquires the content data sent from the storage device;
A content reproduction instruction unit that instructs the content reproduction unit to acquire the content data from a network address indicating the content reproduction device itself in response to an input signal instructing reproduction of the content data;
When the content reproduction unit requests acquisition of the content data to the network address indicating the content reproduction device itself, the content reproduction unit uses the second protocol different from the first protocol to the storage device Requesting acquisition of content data and functioning as a relay unit that converts the content data sent from the storage device using the second protocol into the first protocol and sends it to the content reproduction unit A program characterized by 10. The program according to claim 9, wherein the first protocol is a protocol that does not involve encryption, and the second protocol is a protocol that involves encryption. The program according to claim 9, wherein the first protocol is an HTTP protocol, and the second protocol is an HTTPS protocol. When functioning as the content reproduction instruction unit, the network address obtained by adding the specific network address of the storage device to the network address indicating the content reproduction device itself is set to the computer. The program according to any one of claims 9 to 11, wherein the content reproduction unit is instructed to acquire the content data. 13. The function according to claim 9, wherein when the content reproduction unit functions as the content reproduction unit, the content data is reproduced when the computer receives at least a part of the content data transmitted from the storage device. The program described in 14. The program according to claim 13, wherein when the computer functions as the relay unit, the computer causes the storage unit to hold at least a part of the content data transmitted from the storage device.

Images