JP2017034378A - COMMUNICATION DEVICE, COMMUNICATION DEVICE CONTROL METHOD, PROGRAM - Google Patents

Abstract

Provided are a communication device, a communication device control method, and a program for setting a wireless communication path for acquiring content with a simple operation and transferring the reproduction of content between the devices. A playback unit that plays back content, and a request to execute a service that plays back content when communication with another communication device is started by the first communication method while the content is played back by the playback unit; Communication according to the second communication method having a higher communication speed or a longer communication distance than that of the first communication method, and communication parameters for performing communication for acquiring content are transmitted to the other communication by the first communication method. Transmitting means for transmitting to the apparatus. [Selection] Figure 4

Description

  The present invention relates to communication technology.

  There are technologies for streaming content. In Patent Document 1, when the playback of the video being played back by the device A is shifted to the device B, a predetermined period required until the device B plays the video after the device A is instructed to shift the playback. Continue playing the video until

JP, 2014-131113, A

  In the above-described Patent Document 1, it is assumed that a communication path for acquiring content in the device B is established when the reproduction of content such as video on the device A is shifted to the device B. When the communication path for acquiring content in the device B is not established when the playback of the content in the device A is shifted to the device B, the communication path needs to be set in the device B. For example, in order to communicate with a wireless LAN (IEEE802.11 series), it is necessary to set various communication parameters. Setting these communication parameters by user input takes time due to complicated input operations. Therefore, when the communication path for acquiring content is not established in the device B, it may take time until the playback of the content shifts from the device A to the device B.

  It is an object of the present invention to perform setting of a wireless communication path for acquiring content by a simple operation, and to transfer content reproduction between devices.

  The communication device of the present invention reproduces the content when the wireless communication with the other communication device is started by the first communication method when the content is played back by the playback unit and the playback unit. And a communication parameter for performing wireless communication for acquiring the content, which is wireless communication by the second communication method having a communication speed faster or longer communication distance than the first communication method. And transmitting means for transmitting to the other communication device by the first communication method.

  In addition, the communication device according to another aspect of the present invention, when wireless communication is started with another communication device according to the first communication method, a service execution request for reproducing content and a communication speed according to the first communication method. Wireless communication by the second communication method having a fast communication distance or a long communication distance, and receiving communication parameters for performing wireless communication for acquiring the content from the other communication device by the first communication method. Receiving means, acquiring means for acquiring the content by wireless communication based on the second communication method based on the communication parameter, and reproducing means for playing back the content acquired by the acquiring means. And

  The communication device according to another aspect of the present invention, when wireless communication is started with the first other communication device by the first communication method, a service execution request for reproducing content, and the first communication method. Wireless communication by a second communication method having a higher communication speed or a longer communication distance, and a communication parameter for performing wireless communication for acquiring the content by the first communication method. When receiving wireless communication with the second other communication device by the first communication method after receiving by the receiving device, and receiving by the receiving device, the service execution request, and Transmission means for transmitting communication parameters to the second other communication device by the first communication method.

  According to the present invention, setting of a wireless communication channel for acquiring content can be performed with a simple operation, and content playback can be transferred between devices.

It is a figure which shows a system configuration. It is a figure which shows the structure of a communication apparatus. It is a figure which shows the information regarding a content. It is a figure which shows the sequence of a system. It is a flowchart which shows operation | movement of a smart phone. It is a flowchart which shows operation | movement of a display. It is a figure which shows the sequence of a system.

  Hereinafter, a communication device and a communication system according to the present embodiment will be described in detail with reference to the drawings. FIG. 1 is a diagram of a device configuration of a system 100 assumed in the present embodiment described below. The system 100 includes a plurality of communication devices such as a digital camera 101, a smartphone 102, and a display 103. Note that the device in the communication system according to the present embodiment may be a device such as a printer, a PC, a video camera, a smart watch, or a PDA.

  The smartphone 102 can communicate with the digital camera 101 or the display 103 using NFC (Near Field Communication). In this embodiment, each device performs bidirectional communication in the P2P mode defined in the NFC Forum. Note that the smartphone 102 may communicate in the reader / writer mode defined in the NFC Forum, and the digital camera 101 or the display 103 may communicate in the card emulation mode defined in the NFC Forum. Note that the reader / writer mode is a mode for reading from and writing to a memory of a device operating in the card emulation mode. The card emulation mode is a mode in which reading and writing are performed on a memory from a device operating in the reader / writer mode.

  In addition, the digital camera 101, the smartphone 102, and the display 103 can communicate over a wireless LAN. The system 100 communicates the video content photographed and stored by the digital camera 101 via the wireless LAN, and performs streaming playback on the smartphone 102 and the display 103. The digital camera 101 is a distribution device that distributes content. The system 100 uses the UPnP AV standard when streaming video content. The digital camera 101 operates as a Media Server in UPnP AV. Further, the smartphone 102 operates as a control point with decoder in UPnP AV. The display 103 operates as a media renderer in UPnP AV. Note that DLNA (Digital Living Network Alliance) may be used when streaming video content. In the present embodiment, the content to be streamed is described as a moving image. However, for example, the content to be streamed may be content other than a video such as music.

  Note that the wireless LAN communication in the present embodiment is communication conforming to the IEEE (The Institute of Electrical and Electronics Engineers, Inc.) 802.11 series. However, the communication mode is not necessarily limited to a wireless LAN compliant with IEEE 802.11. The wireless LAN communication in the present embodiment can be replaced by another communication method having a higher communication speed or a longer communication distance than NFC communication, for example.

  In the present embodiment, the smartphone 102 operates as an access point in the infrastructure mode defined in the IEEE 802.11 standard, and communicates with the digital camera 101 or the display 103. The access point forms a wireless network, and performs authentication / encryption processing and station management for the station. The digital camera 101 and the display 103 operate as a station in the infrastructure mode defined in the IEEE 802.11 standard. The digital camera 101 or the display 103 may operate as an access point, and other devices may operate as a station. Further, the system 100 may perform wireless LAN communication in an ad hoc mode defined in the IEEE 802.11 standard. Further, wireless LAN communication may be performed by performing a connection procedure using Wi-Fi Direct (registered trademark) between communication devices. The system 100 may further include an external device that operates as an access point, and the digital camera 101, the smartphone 102, and the display 103 may communicate with each other in a wireless network formed by the external device as an access point.

  Next, the configuration of the communication apparatus (digital camera 101, smartphone 102, and display 103) of the system 100 will be described with reference to FIG. The communication device 300 includes a display unit 301, an operation unit 302, a storage unit 303, a power supply unit 304, a control unit 305, a ROM 306, a RAM 307, a wireless LAN communication unit 308, an NFC communication unit 309, and a function unit 310. The display unit 301 is configured by, for example, an LCD or an LED, has a function of outputting information visually recognizable by the user, and performs display control of various UIs. The operation unit 302 has a function for the user to perform various inputs and operate the communication apparatus. Note that the display unit 301 and the operation unit 302 may be integrally configured by a touch panel or the like.

  The storage unit 303 includes a storage medium such as an HDD, a flash memory, or a removable SD card, and stores and manages various data such as wireless communication network information, data transmission / reception information, image data, and applications. The power supply unit 304 is, for example, an AC (Alternating Current) power supply, acquires a power supply for operating the entire apparatus from an outlet, and supplies power to each hardware. The power supply unit 304 may be a battery.

  The control unit 305 is, for example, a CPU (Central Processing Unit), and controls the operation of the entire communication device 300. The ROM 306 stores control instructions, that is, programs. Various operations to be described later are realized by the control unit 305 executing a control program stored in the ROM 306. The RAM 307 is used for temporary storage of work memory and data when executing a program.

  The wireless LAN communication unit 308 is a chip or an antenna that performs wireless LAN communication. The wireless LAN communication unit 308 performs wireless communication conforming to the IEEE 802.11 series. In the present embodiment, the wireless LAN communication unit 308 performs wireless communication conforming to the IEEE802.11 series, but other communication methods such as Bluetooth (registered trademark) may be used.

  The NFC communication unit 309 is a chip or an antenna that performs NFC communication conforming to the NFC standard. Further, the NFC communication unit 309 automatically establishes NFC communication when detecting a device capable of communication within the communication range. The NFC communication unit 309 performs wireless communication in conformity with the NFC standard. However, for example, the NFC communication unit 309 performs communication by other close proximity wireless communication such as infrared communication (IrDA) or TransferJet, or other wireless communication methods. May be. Further, the NFC communication unit 309 may use a Bluetooth (registered trademark) Low Energy (BLE) system defined by Bluetooth (registered trademark) 4.0.

  The functional unit 310 is hardware for the communication device 300 to execute a predetermined process. For example, when the communication apparatus 300 is the digital camera 101, the function unit 310 is a shooting unit and takes a moving image or a still image. For example, when the communication apparatus 300 is the smartphone 102, the function unit 310 is a public wireless communication unit, and performs communication processing on the public wireless. For example, if the communication apparatus 300 is the display 103, it is an input unit and inputs video information.

  The operation of the system having the above configuration will be described. In the present embodiment, a case will be described in which video content stored in the digital camera 101 is streamed on the smartphone 102 and the playback of the video content is transferred to the display 103. In the UPnP (Universal Plug and Play) AV standard, which is a standard for performing streaming playback, after instructing another device to start playback of content, information indicating the playback position of the content is transmitted to the other device. Notice. When the playback of the content being played back on the device A is shifted to the device B, when the device B is instructed to start the playback of the content, the playback starts from the beginning of the content until receiving information indicating the playback position of the content Will start. Therefore, when the playback of the content being played back on the device A is shifted to the device B, the content from a playback position different from the desired playback position may be played back temporarily. In the following description, an operation for preventing playback of content from a playback position that is temporarily different from a desired playback position and shifting the playback of content from the desired playback position will be described.

  The sequence of the communication system 100 of this embodiment is demonstrated using FIG. A wireless LAN communication path is established between the digital camera 101 and the smartphone 102 (S801).

  The setting of the wireless LAN communication path in S801 may be performed by a handover process using NFC, which will be described later. Handover refers to an act of switching from communication in the first communication method to communication in the second communication method.

  The smartphone 102 performs a search process (S802, S803) for searching for a service executable by another device via the wireless LAN communication path, and determines whether the digital camera 101 is compatible with the streaming playback service. To do. The smartphone 102 may use SSDP (Simple Service Discovery Protocol) for the service search process.

  When the smartphone 102 confirms that the digital camera 101 is compatible with the streaming playback service, the smartphone 102 executes a search process for content held by the digital camera 101 (S804, S805). The smartphone 102 acquires a response of the contents shown in FIG. 3 from the digital camera 101 as a result of the content search process. The smartphone 102 displays content information held by the digital camera 101 and displays a selection menu for selecting content to be played back. The smartphone 102 selects the content to be played according to the user operation (S806). The smartphone 102 acquires the URI for acquiring the streaming data of the content selected as the reproduction target from the result of the content search process, and stores it (S807). The smartphone 102 accesses a URI for acquiring streaming data in a format that can be played back by the own device, and performs content acquisition processing (S808, S809). The content acquisition request in the content acquisition process may use the HTTP Pull protocol. The smartphone 102 reproduces the streaming data distributed from the digital camera 101 according to the content acquisition process (S810).

  Next, a case where content playback on the smartphone 102 is transferred to the display 103 having a larger screen will be described. The smartphone 102 receives an operation (Pause operation) for temporarily stopping reproduction of content from the user (S811). The smartphone 102 pauses the reproduction of the content and stores information indicating the reproduction position of the content at the time of the pause. The smartphone 102 stores a time stamp as information indicating the playback position of the content. Further, index information such as playback track information and playback chapter may be used as information indicating the playback position of the content. In addition, the smartphone 102 displays a message prompting the user to start NFC communication with another device, such as “If playback is transferred to another device, start NFC communication with another device.” It may be displayed. In addition, the smartphone 102 starts NFC communication with other devices, such as “When continuous playback is transferred to another playback device, start NFC touch (communication) with other playback devices.” A message prompting you to do so may be displayed. In addition, although the smart phone 102 memorize | stores the information which shows the reproduction position of the content at the time of pausing, you may memorize | store the information which shows the reproduction position before or after a predetermined time from the time of pausing. In addition, the smartphone 102 stores information indicating the playback position at the time when the pause of playback is accepted, but does not accept the pause of playback and indicates the playback position of the content when NFC communication is started. Information may be stored. In other words, the smartphone 102 may be configured to acquire information indicating a reproduction position based on the progress of reproduction of content when NFC communication is started.

  It is assumed that the smartphone 102 and the display 103 are brought close to each other by a user operation so that NFC communication is possible (S813). When the NFC communication is started in a state where the reproduction of the content being streamed is paused, the smartphone 102 performs a process for shifting the reproduction of the content being streamed to the NFC communication partner device. The smartphone 102 executes a handover process for switching from NFC communication to wireless LAN communication in order to establish a communication path for causing the display 103 to acquire content.

  When the NFC communication is established, the smartphone 102 transmits a handover request message to the display 103 by the NFC communication unit 309 (S814). The handover request message is a message for requesting a new connection by a communication method different from NFC. In the present embodiment, the handover request message is a Handover Request message defined by NFC Forum Connection Handover Technical Specification.

  The handover request message in the present embodiment includes identification information for identifying a communication method that can be handed over and communication parameters necessary for wireless communication using this communication method. It is assumed that the handover request message in S814 includes communication parameters for communication in a wireless network formed by the smartphone 102 as an access point.

  For example, communication parameters required for wireless LAN communication are an SSID (Service Set Identifier) as a network identifier, an encryption method, a network key (encryption key, authentication key), an authentication method, a passphrase, a MAC address, and the like. The identification information for identifying the communication method that can be handed over includes the type of communication method such as wireless LAN / Wi-Fi Direct / Bluetooth (registered trademark), and the activation state of each communication method (activated, activated, Non-active etc.) may be included. Further, an IP address or UUID for performing communication in the IP layer may be included.

  In addition, the handover request message in S814 includes information on the service that is requested to be executed. In this case, the handover request message in S814 includes information for requesting the streaming playback service. In addition, the handover request message in S814 includes information regarding the content to be processed in the requested service. In this case, the handover request message in S814 includes information related to the content whose reproduction is paused in the smartphone 102. The information regarding the content includes identification information for identifying the content, address information for acquiring the content, and information indicating the playback position of the content. The information indicating the content playback position is, for example, a time stamp. The handover request message in S814 includes the time stamp information stored in S812. Note that the smartphone 102 may transmit the handover request message without including information indicating the content reproduction position when the NFC communication is started without accepting the reproduction pause. Further, when the smartphone 102 starts NFC communication without accepting the pause of playback, the smartphone 102 may transmit a handover request message including information indicating playback from the beginning of the content as information indicating the playback position of the content. Good. When the display 103 receives the handover request message from the smartphone 102, the display 103 transmits a handover response message by NFC (S815). In the present embodiment, the handover response message is a Handover Select message defined by NFC Forum Connection Handover Technical Specification.

  The display 103 transmits a handover response message including information on whether or not the handover is requested and whether or not the service is requested in the received handover request message. In this case, the display 103 transmits a handover response message including information indicating that the handover to the wireless LAN requested in the received handover request message and the streaming reproduction service are executed.

  When the display 103 transmits the handover response message, the display 103 establishes communication in a wireless LAN that is a communication path for acquiring content using the communication parameter included in the received handover request message (S817). When the wireless LAN communication path is established, the display 103 accesses a URI that is address information for acquiring streaming data of the content included in the received handover request message, and performs content acquisition processing (S818, S819). In the example of FIG. 4, acquisition of content from the digital camera 101 of the display 103 is executed via a wireless network formed by the smartphone 102 as an access point.

  The display 103 performs control for reproduction from the reproduction position indicated by the type stamp, which is information indicating the reproduction position of the content included in the received handover request message (S820). The display 103 reproduces the streaming data of the content distributed from the digital camera 101 according to the content acquisition process from the reproduction position indicated by the type stamp (S821). Note that the display 103 may wait for reproduction until it receives streaming data up to the reproduction position indicated by the received information indicating the reproduction position. Further, the display 103 may acquire streaming data from the reproduction position indicated by the received information indicating the reproduction position.

  As described above, according to the present embodiment, the establishment of a communication path for acquiring content and the transition of content reproduction are performed simply by performing a simple operation of bringing the smartphone 102 in a state of reproducing content closer to the display 103. And can be done. Further, according to the present embodiment, the information for establishing the communication path and the information indicating the reproduction position of the content are provided to the display 103, so that the display 103 is prevented from reproducing from the beginning of the content. . Therefore, unnecessary contents are reduced from being output from the display 103.

  Next, the operation of the smartphone 102 will be described using the flowchart shown in FIG.

  Note that the flowchart shown in FIG. 5 is realized by the control unit 305 of the smartphone 102 executing a control program stored in the ROM 306 to perform calculation and processing of information and control of each hardware. Note that part or all of the steps shown in the flowchart shown in FIG. 5 may be realized by hardware such as ASIC.

  Further, the flowchart of FIG. 5 shows a case where the user is instructed to execute a content streaming playback service when communication between the smartphone 102 and the content distribution apparatus (in FIG. 4, the digital camera 101) is possible via a wireless LAN. To begin.

  The smartphone 102 performs a service search process for searching for a service that can be executed by another device via communication by the wireless LAN communication unit 308 (S1001). The smartphone 102 determines whether there is an apparatus that can execute the streaming playback service from the result of the service search process (S1002). If it is determined that there is no device capable of executing the streaming playback service, the smartphone 102 performs the service search process from S1001 again. If it is determined that there is no device capable of executing the streaming playback service, an error may be displayed and the process may be terminated.

  If it is determined in S1002 that there is an apparatus capable of executing the streaming playback service, the smartphone 102 performs a search process for content held by another apparatus via communication by the wireless LAN communication unit 308. (S1003). Note that when a plurality of devices capable of executing the streaming reproduction service are detected, a device that performs the content search process may be selected according to a user operation. The smartphone 102 acquires access information for accessing content that can be held and distributed by other devices from the result of the content search process (S1004). Further, the smartphone 102 determines whether or not the content stored in another device is in a format that can be reproduced by the own device based on the result of the content search process (S1005). When it is determined that there is no format that can be reproduced by the own device among the contents that can be distributed by other devices, the smartphone 102 performs the processing from S1001 again. If it is determined that there is no format that can be reproduced by the own device among the contents held and distributed by other devices, an error may be displayed and the process may be terminated.

  When it is determined that there is a reproducible format among the contents that can be distributed by other devices, the smartphone 102 displays information on the content and displays a selection menu for selecting the content to be reproduced on the display unit 301. (S1006). The smartphone 102 determines whether or not an operation for selecting content to be played has been performed on the operation unit 302 (S1007). When the selection operation of the content to be played back is not performed on the operation unit 302 before the predetermined period has elapsed, the smartphone 102 performs the service search process from S1001 again. In addition, when the selection operation of the content to be played is not performed on the operation unit 302 before the predetermined period has elapsed, an error may be displayed and the process may be terminated.

  When the selection operation of the content to be played is performed by the operation unit 302 before the predetermined period elapses, the smartphone 102 acquires and stores access information for acquiring the selected content (S1008). The smartphone 102 accesses access information for acquiring streaming data in a format that can be played back by the own device, and performs content acquisition processing (S1009). The smartphone 102 reproduces the acquired streaming data of the content and displays it on the display unit 301 (S1010).

  The smartphone 102 determines whether or not to end the reproduction of the content streaming data (S1017). When the reproduction is ended, the smartphone 102 ends the process.

  The smartphone 102 determines whether or not an operation for pausing the reproduction while the content streaming data is being reproduced is performed on the operation unit 302 (S1011).

  When an operation for pausing reproduction is performed on the operation unit 302, the smartphone 102 pauses the reproduction of the content and stores information indicating the reproduction position of the content at the time of the pause. The smartphone 102 determines whether communication by the NFC communication unit 309 is started in a state where the reproduction of the content is paused (S1013). In addition, the smart phone 102 complete | finishes the pause of reproduction | regeneration and performs the process from S1010 again, when restarting reproduction | regeneration.

  When communication by the NFC communication unit 309 is started in a state where content reproduction is paused, a handover request message including information indicating the content reproduction position and address information for acquiring the content is transmitted (S1014). ). In addition, the handover request message transmitted in S1014 includes a streaming playback service execution request and communication parameters for setting a communication path for acquiring content.

  When the smartphone 102 starts communication by the NFC communication unit 309 without temporarily stopping playback of the content, the smartphone 102 sends a handover request message including information indicating the playback position of the content based on the timing at which the NFC communication is started. May be sent. Further, when the NFC communication is started without accepting the pause of playback, the smartphone 102 may transmit the handover request message without including information indicating the playback position of the content. In this case, the smartphone 102 may transmit a handover request message including address information for acquiring content. Further, when the smartphone 102 starts NFC communication without accepting the pause of playback, the smartphone 102 may transmit a handover request message including information indicating playback from the beginning of the content as information indicating the playback position of the content. Good. Then, the smartphone 102 determines whether or not a handover response message has been received from the communication partner device (the display 103 in FIG. 4) of the NFC communication unit 309 (S1015). If the handover response message is not received within a predetermined period (for example, within 1 second) after transmitting the handover request message, the smartphone 102 displays an error and ends the process.

  Upon receiving the handover response message, the smartphone 102 determines whether or not handover can be executed and whether or not the service can be executed from the communication partner apparatus, and the process ends. When receiving the handover response message, the smartphone 102 may display information on whether or not handover can be executed and whether or not the service can be executed on the display unit 301 from the communication partner apparatus. In addition, the smartphone 102 may stop or continue playing the content on its own device after shifting the playback of the content.

  Next, the operation of the display 103 will be described using the flowchart shown in FIG.

  Note that the flowchart shown in FIG. 6 is realized by the control unit 305 of the display 103 executing a control program stored in the ROM 306 to perform calculation and processing of information and control of each hardware. A part or all of the steps shown in the flowchart shown in FIG. 6 may be realized by hardware such as ASIC.

  Further, the flowchart of FIG. 6 is started when the display 103 and a communication partner apparatus capable of NFC communication (the smartphone 102 in FIG. 3) are brought close to a distance capable of NFC communication by a user operation.

  When the display 103 detects proximity within a distance that allows NFC communication with the communication partner device, the display 103 starts NFC communication with the communication partner device (S1101). When the display 103 establishes the NFC connection with the communication partner device, the display 103 determines whether or not the handover request message is received by the NFC communication unit 309 (S1102). When the NFC communication unit 309 receives information different from the handover request message, the display 103 executes processing according to the received information.

  When the display 103 receives a handover request message from the communication partner apparatus, the display 103 determines whether service information is included in the received handover request message (S1103). When the service information is not included in the received handover request message, the display 103 advances the processing to S1113 described later. When service information is included in the received handover request message, the display 103 reads the service information (S1104). The display 103 determines whether or not the service indicated by the received service information and the service requested by the communication partner apparatus is a streaming playback service (S1105). When the service requested from the communication partner apparatus is not the streaming playback service, the display 103 performs processing according to the requested service (S1112). For example, in S1112, the display 103 determines whether or not the requested service can be executed, and generates information that indicates the determination result and is included in the handover response message.

  When the service requested from the communication partner apparatus is the streaming playback service, the display 103 determines whether or not information indicating the content playback position is included in the handover response message. If the information indicating the content reproduction position is not included, the display 103 sets the beginning of the content as the reproduction start position (S1108). On the other hand, when the handover response message includes information indicating the content playback position, the display 103 sets the content playback start position according to the information indicating the content playback position (S1107).

  The display 103 determines whether or not the format of the content to be distributed includes a content that can be reproduced on the display 103 based on the information regarding the content included in the received service information (S1109). If the content format to be distributed does not include a reproducible format, the display 103 generates information to be included in the handover response message, which is information indicating that the streaming reproduction service is not executed. Note that the information generated here is a reason for not executing the streaming reproduction service, and information indicating that there is no reproducible format may be generated (S1111). On the other hand, when the format of the content distributed in S1109 includes a reproducible format, the display 103 acquires a URI used for accessing the content from the received handover request message (S1110). In S1110, the acquired URI is address information for acquiring content in a reproducible format.

  In addition, although the process of S1106-S1111 is performed before transmission of a handover response message, you may perform after transmission of a handover response message. When the processing of S1106 to S1111 is performed after transmission of the handover response message, the handover response message transmitted by the display 103 includes at least information regarding whether or not handover can be performed and information regarding whether or not service can be performed.

  The display 103 transmits a handover response message including information on whether or not handover can be executed and whether or not the service can be executed by the NFC communication unit 309 according to the processing results of S1103 to S1111 (S1113).

  The display 103 determines whether or not to execute the handover notified in the handover response message (S1119), and ends the process if the handover is not performed. When executing the handover, the display 103 establishes the handover destination communication path by the wireless LAN communication unit 308 according to the communication parameter for setting the communication path included in the handover request message (S1114).

  The display 103 determines a service to be performed in the handover destination communication path (S1115). When executing a service different from the streaming reproduction service, the display 103 executes a communication process according to the service to be executed (S1118) and ends the process. . When the streaming reproduction service is performed in the handover destination communication path, the display 103 accesses the URI acquired in S1110 and performs the streaming data acquisition process of the content (S1116).

  Based on the received streaming data, the display 103 starts playing the content from the playback position set in S1107 or S1108 (S1117).

  When starting the content from the reproduction start position set in S1107, the display 103 reproduces the content based on the type stamp that is information indicating the reproduction position without reproducing the content from the beginning.

  As described above, according to the present embodiment, it is possible to establish a communication path and shift the reproduction of content only by performing a simple operation of bringing devices close to each other. Further, according to the present embodiment, when content reproduction is transferred between devices, it is necessary to exchange a Seek message for designating a reproduction position after starting the content acquisition processing in the device that performs reproduction. No. Therefore, in an apparatus that shifts playback, content is not played back from the beginning before the seek message is exchanged.

  In the above-described embodiment, content streaming data communication may be performed in a wireless network formed by the digital camera 101 as an access point. In this case, the handover request message transmitted from the smartphone 102 to the display 103 includes communication parameters for communication in a wireless network formed by the digital camera 101 as an access point. By doing in this way, since the display 103 can acquire the streaming data of content directly from the digital camera 101 without going through the smartphone 102, the communication band can be used efficiently. In addition, when performing content streaming data communication in a wireless network formed by an external device, the smartphone 102 may provide the display 103 with communication parameters for communication in the wireless network formed by the external device.

  In addition, when directly communicating streaming data of content between the digital camera 101 and the display 103, a mediated handover using the smartphone 102 as a mediator may be executed. “Mediated Handover” is defined in the NFC Forum, and is a handover for executing a handover through three devices.

  FIG. 7 shows a sequence of the system 100 when using the Mediad Handover. In FIG. 7, when video content is being played back by the digital camera 101 (S701), it is assumed that the digital camera 101 and the smartphone 102 are brought close to each other by a user operation so that NFC communication is possible (S702). Note that NFC communication may be started in a state where content is temporarily stopped by the digital camera 101. Further, at this time, the smartphone 102 is in a state of accepting an instruction to mediate handover by the user. When the smartphone 102 starts NFC communication in a state in which a handover mediation instruction has been received by the user, the smartphone 102 transmits a handover request message including information indicating that the mediation of handover is performed (S703). The handover request message transmitted here is a Handover Media Request message defined in the NFC Forum.

  Upon receiving the handover request message from the smartphone 102, the digital camera 101 transmits a handover response message by NFC communication (S704). The handover response message includes identification information for identifying a communication method that can be handed over by the digital camera 101 and communication parameters necessary for performing wireless communication using this communication method. Also, the handover response message transmitted here includes information indicating that the streaming playback service can be executed or a request for executing the service, and a playback position based on the progress of playback of the content when NFC communication is started. Is included. In addition, the handover response message transmitted by the digital camera 101 includes address information for each format of the content being played back by the digital camera 101. In addition, the handover response message includes communication parameters for setting a communication path for acquiring content and communication parameters for performing a wireless LAN. Note that the handover response message transmitted here is a Handover Median Response message defined in the NFC Forum.

  Upon receiving the handover response message, the smartphone 102 displays a message prompting to start NFC communication with a device different from the digital camera 101 (S705). Then, it is assumed that the smartphone 102 is brought close to the display 103 to a distance where NFC communication is possible by a user operation (S706). When the display 103 is brought close to a distance where NFC communication is possible by a user operation, the smartphone 102 transmits a handover request message including information indicating mediation of handover to the display 103 by NFC communication (S707). Here, in the handover request message to be transmitted, a handover in a communication method capable of handover acquired from the digital camera 101 and a service executable by the digital camera 101 may be requested. The handover request message transmitted here is a Handover Media Request message defined in the NFC Forum.

  Upon receiving the handover request message from the smartphone 102, the display 103 transmits a handover response message by NFC (S708). The handover response message transmitted here includes identification information for identifying a communication method to which the display 103 can be handed over. Further, when a handover using a communication method capable of handover acquired from the digital camera 101 is requested, the display 103 may include information indicating whether or not the connection is possible in the handover response message. When the execution of the service acquired from the digital camera 101 is requested, the display 103 may include information indicating whether or not the service is executable in the handover response message. For example, the display 103 may determine whether or not the service can be executed based on the presence / absence of content in a reproducible format based on the information regarding the content included in the received handover request message.

  When the smartphone 102 receives the handover response message from the display 103, the smartphone 102 determines whether or not a handover is possible between the digital camera 101 and the display 103 (S709). The smartphone 102 determines that the handover can be performed between the digital camera 101 and the display 103 when the communication method that can be handed over between the digital camera 101 and the display 103 matches. If the smartphone 102 determines that the streaming playback of the content in the corresponding format can be executed between the digital camera 101 and the display 103, the smartphone 102 determines that the handover is possible.

  If the smartphone 102 determines that a handover is not possible between the digital camera 101 and the display 103, the smartphone 102 displays an error and ends the process. On the other hand, when the smartphone 102 determines that the handover is possible between the digital camera 101 and the display 103, the smartphone 102 transmits a handover start request message including information indicating the reproduction position acquired from the digital camera 101 ( S710). The handover start request message is a message for requesting the start of handover, and is a Handover Initiate Request message defined in NFC Forum.

  The handover start request message transmitted here includes a communication request for requesting connection and communication with the digital camera 101 via the wireless LAN. The handover start request includes communication parameters acquired from the digital camera 101. In addition, an execution request for the streaming playback service is included. Further, the handover start request message includes various information acquired from the digital camera 101 such as access information to the content. Various information acquired from the digital camera 101 may be included in the handover request message and provided to the display 103.

  Upon receiving the handover start request message from the smartphone 102, the display 103 transmits a handover start response message including information indicating that the handover is started by NFC communication (S711). The handover start response message is a Handover Initiate Response message defined in the NFC Forum.

  When transmitting the handover start response message, the display 103 establishes communication in a wireless LAN, which is a communication path for acquiring content using the communication parameters included in the received handover start request message (S712). When the wireless LAN communication path is established, the display 103 accesses the URI, which is the received address information, and performs content acquisition processing (S713, S714).

  The display 103 performs control for reproduction from the reproduction position indicated by the type stamp which is information indicating the reproduction position of the content included in the received handover request message (S715). The display 103 reproduces the streaming data of the content distributed from the digital camera 101 in accordance with the content acquisition process from the reproduction position indicated by the type stamp (S716). Note that the display 103 may wait for reproduction until it receives streaming data up to the reproduction position indicated by the received information indicating the reproduction position. Further, the display 103 may acquire streaming data from the reproduction position indicated by the received information indicating the reproduction position.

  As described above, by using the mediated handover, it is possible to transfer the content being played back on the first device to the third device through a simple operation through the mediation of the second device. In this case, even if it is between devices where direct NFC communication is difficult, such as a display in which the first device and the third device are fixedly set, the second device that is a mobile terminal such as a smartphone is used. You can easily transfer playback.

(Other embodiments)
In the above-described embodiment, the system in which the display 103 acquires content from the digital camera 101 has been described, but the display 103 may acquire content from the smartphone 102. That is, the above-described embodiment may be applied to a system having the smartphone 102 and the display 103.

The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

101 Digital Camera 102 Smartphone 103 Digital TV

Claims (25)

A communication device,
Playback means for playing back content;
When wireless communication is started with another communication device by the first communication method while the content is being reproduced by the reproduction means, an execution request for a service for reproducing the content, and a communication speed by the first communication method. Wireless communication using the second communication method with a fast communication distance or a long communication distance, and communication parameters for performing wireless communication for acquiring the content are transmitted to the other communication device using the first communication method. Sending means to
A communication apparatus comprising:   When the transmission unit starts communication with another communication apparatus by the first communication method while the reproduction unit reproduces the content, the reproduction unit reproduces the content when the communication is started. The communication apparatus according to claim 1, wherein information indicating a reproduction position based on the progress of the transmission is transmitted to the other communication apparatus by the first communication method.   When the transmission means starts the communication with the other communication device by the first communication method while the reproduction of the content by the reproduction means is paused, the transmission means starts the reproduction from the paused position. The communication apparatus according to claim 1, wherein information indicating a reproduction position to start is transmitted to the other communication apparatus.   The communication apparatus according to claim 1, wherein the transmission unit transmits address information for acquiring the content to the other communication apparatus. The communication parameter is a parameter for communicating in a wireless network formed by the communication device,
5. The communication apparatus according to claim 1, wherein the content is provided to the other communication apparatus via the wireless network.   5. The communication apparatus according to claim 1, wherein the communication parameter is a parameter for performing communication on a wireless network formed by a distribution apparatus that distributes the content.   The communication apparatus according to any one of claims 1 to 6, wherein the communication parameter is a parameter for communicating on a wireless network formed by an apparatus operating as an access point.   The communication apparatus according to claim 1, wherein the reproduction unit performs streaming reproduction of the content. A communication device,
When wireless communication with another communication device is started by the first communication method, the execution request of the service for reproducing the content and the second communication method having a higher communication speed or a longer communication distance than the first communication method Receiving means for receiving communication parameters for performing wireless communication for acquiring the content from the other communication device by the first communication method;
Obtaining means for obtaining the content by communication according to the second communication method based on the communication parameter;
Playback means for playing back the content acquired by the acquisition means;
A communication apparatus comprising: The receiving means receives information indicating the reproduction position of the content from the other communication device by the first communication method,
The communication apparatus according to claim 9, wherein the reproduction unit reproduces the content acquired by the acquisition unit from a reproduction position indicated by the information. The receiving means receives address information for acquiring the content from the other communication device;
The communication apparatus according to claim 9 or 10, wherein the acquisition unit acquires the content based on the address information.   In accordance with reception by the reception unit, the transmission unit includes a transmission unit configured to transmit a response message indicating whether communication by the second communication method is possible and whether the service is executable to the other communication device. The communication apparatus according to claim 9.   13. The communication apparatus according to claim 9, wherein when the format of the content is a format that cannot be reproduced by the reproduction unit, the acquisition unit does not acquire the content. A communication device,
When wireless communication is started with the first other communication device by the first communication method, the execution request of the service for reproducing the content, and the second communication speed is higher than the first communication method or the communication distance is longer than the second communication device. Receiving means for receiving communication parameters for performing wireless communication for acquiring the content from the first other communication device by the first communication method, which is wireless communication by a communication method;
When wireless communication with the second other communication device is started by the first communication method after reception by the receiving means, the execution request of the service and the communication parameter are transmitted by the first communication method. Transmitting means for transmitting to the second other communication device;
A communication apparatus comprising: The receiving means receives information indicating the reproduction position of the content from the first other communication device by the first communication method,
15. The communication apparatus according to claim 14, wherein the transmission unit transmits information indicating a reproduction position of the content to the second other communication apparatus using the first communication method.   The communication apparatus according to claim 1, wherein the service is a streaming reproduction service.   The communication apparatus according to claim 1, wherein the information indicating the playback position of the content is a time stamp or index information.   The communication apparatus according to claim 1, wherein the communication parameter includes at least one of an SSID, a network key, an encryption method, an authentication method, and a MAC address.   The communication device according to claim 1, wherein the first communication method is NFC (Near Field Communication), Transfer Jet, or Bluetooth (registered trademark) Low Energy.   20. The communication apparatus according to claim 1, wherein the second communication method is an IEEE 802.11 series or a Bluetooth (registered trademark).   The communication apparatus according to claim 1, wherein the content is video or sound. A communication device control method comprising:
A playback process for playing back content;
When wireless communication is started with another communication device by the first communication method while the content is being reproduced in the reproduction step, an execution request for a service for reproducing the content and a communication speed from the first communication method Wireless communication using the second communication method with a fast communication distance or a long communication distance, and communication parameters for performing wireless communication for acquiring the content are transmitted to the other communication device using the first communication method. A transmission process to
A method for controlling a communication apparatus, comprising: A communication device control method comprising:
When wireless communication with another communication device is started by the first communication method, the execution request of the service for reproducing the content, and the wireless by the second communication method having a higher communication speed or a longer communication distance than the first communication method Receiving a communication parameter for performing wireless communication for acquiring the content from the other communication device by the first communication method;
An acquisition step of acquiring the content by communication according to the second communication method based on the communication parameter;
A reproduction step of reproducing the content acquired in the acquisition step;
A method for controlling a communication apparatus, comprising: A communication device control method comprising:
When wireless communication is started with the first other communication device by the first communication method, the execution request of the service for reproducing the content, and the second communication having a communication speed faster or longer than the first communication method. A reception step of receiving communication parameters for performing wireless communication for acquiring the content from the first other communication device according to the first communication method;
When wireless communication with the second other communication device is started by the first communication method after reception in the reception step, the service execution request and the communication parameter are transmitted by the first communication method. A transmission step of transmitting to the second other communication device;
A communication apparatus comprising:   A program for causing a computer to operate as the communication device according to any one of claims 1 to 21.

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