JP2010245898A - Transfer destination device, transfer source device, and image data transfer system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability in selecting an image to be transferred while transferring selected image data at a high speed. <P>SOLUTION: When transferring moving-image data stored in a transfer source device 100 to a transfer destination device 200, at first, a user brings the devices 100, 200 close to each other, starts communication by short-range wireless communication, and transmits/receives ID information and authentication information for middle-range wireless communication. While the middle-range wireless communication is established, the user receives thumbnail image data by the transfer destination device 200 from the transfer source device 100, and selects the moving-image data to be transferred to allow selection of transfer data anywhere inside a communication area of the middle-range wireless communication. When the selection of the moving-image data to be transferred is completed, the devices 100, 200 are again brought close to each other so as to transfer the moving-image data via the short-range wireless communication. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transfer source device that holds image data, a transfer destination device that receives image data from the transfer source device, an image data transfer system, an image data transfer method, and a program, and in particular, the transfer source device and the transfer destination device are short. The present invention relates to a device capable of communicating by distance radio and medium range radio.

  In recent years, devices having a wireless data transfer function such as a wireless LAN have been remarkably spread. Since there is no need to physically connect with a cable or the like, it is expected to be applied to data transfer between various household devices in the future. As an example, a technique for mounting a wireless LAN function on a digital camera and transferring captured image data to an image server using the wireless LAN has been proposed (see, for example, Patent Document 1).

  One of the fields of application of such wireless data transfer is to select a moving image to be viewed from moving image data stored in a home video recorder or data server and transfer it to a portable image playback device via wireless communication. However, it can be used for playing and enjoying on the go. The following are conventional techniques for selecting a specific image and transferring image data by wireless communication. First, a reduced image (thumbnail image) of image data in the transfer source device is received by the transfer destination device, and the user selects an image to transfer while viewing the thumbnail image. In this technique, image data corresponding to a thumbnail image is transferred from a transfer source device to a transfer destination device (see, for example, Patent Document 2).

  The following two types of wireless communication for home use are conceivable. One is wireless communication (medium-range wireless communication) between devices separated by several meters to several tens of meters, such as a wireless LAN. The other is wireless communication (short-range wireless communication) with devices close to a distance of several centimeters, such as Felica, which has been put to practical use in communication of IC card-type electronic money and electronic ticket information, etc. It is. With regard to the latter short-range wireless communication, in addition to the use of electronic money as described above, a technique for increasing the communication speed and using it for transferring a larger amount of data has recently been proposed (see, for example, Patent Document 3). ).

  In short-range wireless communication, communication error processing, authentication processing, and the like can be simplified. Thus, while the communication speed of medium-range wireless communication is generally about several tens of Mbps, a communication speed that is about 10 times faster than that is obtained. It is expected. In the moving image data transfer application as described above, since a large amount of moving image data is transferred, the short-range wireless communication is more convenient because the data can be transferred in a shorter time.

  Further, in medium-range wireless communication, a plurality of devices can exist in a communication area, and it is necessary to prevent unauthorized use from the outside. For this reason, operations such as registering a communication device used by the user in advance or performing authentication at the time of connection are necessary, and it is difficult to understand and use for general users. On the other hand, in short-range wireless communication, one-to-one communication can be established by bringing devices close to each other, and unauthorized use is difficult. Therefore, user operations related to registration and authentication are not necessary. Therefore, from this point of view, it is convenient for data transfer in the home.

JP 2004-64423 A JP 2003-234987 A JP 2005-79783 A

  However, in the short-range wireless communication suitable for transferring image data as described above, it is necessary to bring the devices close to each other with a distance of several centimeters. Therefore, in some cases, there is a problem that it is difficult for the user to operate the device. For example, when you want to transfer image data from a stationary video recorder to a portable device, when selecting the image you want to transfer by looking at the thumbnail image, the selection operation is performed while the portable image playback device is close to the video recorder, etc. , May be difficult to operate.

  The present invention has been made in view of the above points, and an object of the present invention is to improve operability when selecting an image to be transferred and to transfer image data at high speed.

  The transfer destination device of the present invention can communicate with the transfer source device that holds the image data in the first wireless communication and the second wireless communication that can communicate over a longer distance than the first wireless communication but has a lower communication speed. A transfer destination device communicable by communication, and means for transmitting a transfer request for image information of image data held by the transfer source device to the transfer source device via the second wireless communication; Means for receiving the image information from the transfer source device via the second wireless communication, and selection based on the image information for the transfer source device via the first wireless communication. Means for transmitting information, and means for receiving, from the transfer source device, the image data held by the transfer source device related to the selection information via the first wireless communication. Features.

  According to the present invention, it is possible to improve operability when selecting an image to be transferred and to transfer image data at high speed.

It is a figure which shows the structure of the transfer origin apparatus and transfer destination apparatus in the image data transfer system which concerns on embodiment. It is a flowchart which shows the operation | movement of the communication start process in a transfer destination apparatus. It is a flowchart which shows the operation | movement of the communication start process in a transfer origin apparatus. It is a flowchart which shows the operation | movement of the transfer data selection process in a transfer destination apparatus. It is a flowchart which shows the operation | movement of the transfer data selection process in the transfer origin apparatus. It is a flowchart which shows the operation | movement of the data transfer process in the transfer origin apparatus. It is a flowchart which shows the operation | movement of the data transfer process in a transfer destination apparatus.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a diagram showing a configuration of a transfer source device and a transfer destination device in an image data transfer system according to an embodiment of the present invention. Image data is transferred from the transfer source device 100 to the transfer destination device 200 by wireless communication. Here, it is assumed that the transfer source device 100 is a home stationary video recorder or data server, and the transfer destination device 200 is a portable image playback device. May be reversed.

  The transfer source device 100 and the transfer destination device 200 can communicate over a short distance wireless communication (first wireless communication) and a medium distance wireless communication (longer distance than the first wireless communication, although they are already described). Communication is possible with the second wireless communication having a low speed.

  The transfer source device 100 that holds image data will be described. The microcomputer 101 is a microcomputer that performs system control of the transfer source device 100, and is connected to various control blocks of the transfer source device 100 via the bus 120. The memory 102 stores data used by the microcomputer 101 for control. The storage device 103 stores files such as moving image data, still image data, and thumbnail image data related thereto in a storage medium such as a hard disk, a flash memory, or an optical disk.

  The file transmission / reception unit 104 transmits data of various files stored in the storage device 103 to a device outside the transfer source device 100 via the short-range wireless communication I / F 105 or the medium-range wireless communication I / F 106. Receive file data from external devices.

  The short-range wireless communication I / F 105 exchanges authentication information with the transfer destination device 200 and transmits / receives file data and various control data using high-speed and large-capacity communication means as described in Patent Document 3. Further, the medium-range wireless communication I / F 106 is connected to a wireless LAN network 300 outside the transfer source device 100 by a wireless LAN (for example, one that conforms to the IEEE802.11b standard). Exchange of authentication information with the transfer destination device 200 and transmission / reception of file data and various control data are performed via this network. The communication authentication unit 107 holds authentication information such as ID information unique to the transfer source device 100 and performs mutual authentication processing with the other party communicating via the short-range wireless communication I / F 105 and the medium-range wireless communication I / F 106. I do.

  The decoder unit 108 performs a process of decompressing and reproducing the compressed moving image data and still image data stored in the storage device 103. Also, special reproduction processing when a special reproduction request such as fast-forwarding of moving images is received from the microcomputer 101 is also performed. The stream transmission unit 109 transfers the playback image of the decoder unit 108 as real-time streaming playback data from the mid-range wireless communication I / F 106 to the transfer destination device 200.

  Next, the transfer destination device 200 that receives image data will be described. The functions of each block of the microcomputer 201, the bus 220, the memory 202, the storage device 203, the file transmission / reception unit 204, the short-range wireless communication I / F 205, the medium-range wireless communication I / F 206, the communication authentication unit 207, and the decoder unit 208 are transferred. This is the same as the original device 100, and a description thereof will be omitted.

  The stream reception unit 209 performs reception processing of the real-time streaming reproduction data received by the medium-range wireless communication I / F 206 and outputs the received data to the image processing unit 210. The image processing unit 210 performs processing for displaying moving image data and still image data output from the stream receiving unit 209 and the decoder unit 208. Further, processing such as superimposing menus, icons, etc. on the image or displaying a plurality of thumbnail images side by side according to an instruction from the microcomputer 201 is also performed. The display unit 211 is an image display device such as a liquid crystal panel, and displays the image data input from the image processing unit 210. The operation unit 212 receives an operation from the user by a key, switch, touch panel, or the like, and outputs operation information to the microcomputer 201.

  Hereinafter, with reference to the flowcharts of FIGS. 2 to 7, a series of processes in which a user wants to transfer among moving image data held by the transfer source device 100 and transfers the selected data to the transfer destination device 200 will be described.

  First, with reference to the flowchart of FIG. 2, the short distance wireless communication and medium distance wireless communication start processing in the transfer destination device 200 will be described. The processing illustrated in FIG. 2 is realized by the microcomputer 201 of the transfer destination device 200 executing a program.

  In step S201, the transfer destination device 200 searches for the presence of a short-range wireless communication target device based on the presence or absence of communication radio waves. In step S202, the transfer-destination device 200 determines whether the short-range wireless communication target device exists. judge. Specifically, when the user brings the transfer destination device 200 close to the transfer source device 100 for transferring image data or the like, a communication radio wave is generated, and the presence of the transfer source device 100 is detected. If there is no target device for short-range wireless communication, the process returns to step S201 to continue the search. If there is a target device for short-range wireless communication, the process proceeds to step S203, and a communication start request for short-range wireless communication is transmitted to the detected transfer source device 100.

  In step S <b> 204, the transfer destination device 200 determines whether a communication start acceptance signal has been received from the transfer source device 100. If the communication start acceptance signal has not been received, the process returns to step S203 and the transmission of the communication start request is continued. When the communication start acceptance signal is received, the process proceeds to step S205, and the ID of the transfer destination device 200 necessary for connecting to the transfer source device 100 via the short distance wireless communication by the medium distance wireless communication. Send information. This ID information corresponds to, for example, a MAC address in wireless LAN or information corresponding thereto.

  In step S206, the transfer destination device 200 requests the transfer source device 100 to transmit authentication information for establishing the medium range wireless communication via the short range wireless communication. This authentication information includes information for establishing secure communication such as information for encrypting communication in addition to the ID information of the transfer source device 100.

  In step S207, the transfer destination device 200 determines whether authentication information has been received from the transfer source device 100. If the authentication information has not been received, the process returns to step S206 and the request for transmitting the authentication information is continued. When the authentication information is received, the authentication data is stored in the memory 202 or the storage device 203, and then, in step S208, after establishing medium-range wireless communication with the transfer source device 100 based on the received information, the transfer described later. Proceed to the data selection process (FIG. 4).

  Next, the short distance wireless communication and medium distance wireless communication start processing in the transfer source device 100 will be described with reference to the flowchart of FIG. The processing shown in FIG. 3 is realized by the microcomputer 101 of the transfer source device 100 executing a program.

  In step S301, the transfer source device 100 searches for the presence of a target device for short-range wireless communication based on the presence / absence of a communication radio wave. In step S302, the transfer-source device 100 determines whether a target device for short-range wireless communication exists. judge. Specifically, as described above, when the user brings the transfer destination device 200 close to the transfer source device 100 for transferring image data or the like, a communication radio wave is generated, and the presence of the transfer destination device 200 is detected. If there is no target device for short-range wireless communication, the process returns to step S301 to continue the search. If there is a target device for short-range wireless communication, the process advances to step S303 to accept a detected communication start request for short-range wireless communication from the transfer destination device 200.

  In step S304, the transfer source device 100 determines whether or not a communication start request has been received from the transfer destination device 200. If a communication start request has not been received, the process returns to step S303 to continue accepting the communication start request. When the communication start request is received, the process proceeds to step S305, and a communication start acceptance signal for short-range wireless communication is transmitted to the transfer destination device 200.

  In step S <b> 306, the transfer source device 100 accepts reception of ID information necessary for performing connection by the medium distance wireless communication from the transfer destination device 200 via the short distance wireless communication. In step S307, it is determined whether or not ID information is received from the transfer destination device 200. If the ID information has not been received, the process returns to step S306 to continue accepting the ID information. When the ID information is received, the ID information is stored in the memory 102 or the storage device 103, and the process proceeds to step S308 to accept the authentication information transmission request from the transfer destination device 200.

  In step S <b> 309, the transfer source device 100 determines whether an authentication information transmission request is received from the transfer destination device 200. If the authentication information transmission request has not been received, the process returns to step S308 to continue accepting the authentication information transmission request. When the authentication information transmission request is received, the process proceeds to step S310, and the authentication information is transmitted to the transfer destination device 200 via the short-range wireless communication. Thereafter, the process proceeds to step S311, and after establishing medium-range wireless communication using the ID information of the transfer destination device 200 stored in step S307, the process proceeds to a transfer data selection process (FIG. 5) described later.

  Next, with reference to the flowchart of FIG. 4, a process for selecting moving image data to be transferred in the transfer destination device 200 will be described. The following processing is performed via the medium distance wireless communication established in the communication start processing described with reference to FIG. Therefore, it is not necessary for the user to keep the transfer destination device 200 and the transfer source device 100 close to each other, and the short distance wireless communication may be disconnected once by separating the devices. The transfer data selection operation can be performed at any place in the communication area of the medium-range wireless communication. The processing illustrated in FIG. 4 is realized by the microcomputer 201 of the transfer destination device 200 executing a program.

  In step S401, the transfer destination device 200 requests the transfer source device 100 to transfer thumbnail image data (an example of image information) to be used for selection of a transfer target via the medium-range wireless communication. In the following description, the thumbnail image data is collectively transferred at the beginning of the selection process. However, the present invention is not limited to this. For example, when there are a large number of moving image data stored in the transfer source device 100, the transfer data may be divided into a plurality of times in response to a request from the transfer destination device 200. Further, the transfer may be limited to images taken at a specific date and time, moving image data that matches a search condition set by the user, or the like. The transfer destination device 200 receives the thumbnail image data received from the transfer source device 100 via the medium-range wireless communication by the file transmission / reception unit 204 and temporarily stores it in the memory 202 or the storage device 203.

  In step S402, the transfer destination device 200 determines whether the transfer of thumbnail image data from the transfer source device 100 has been completed. If the thumbnail image data transfer has not been completed, the process returns to step S401 to continue the thumbnail image data transfer request. When the transfer of the thumbnail image data is completed, the process proceeds to step S403, where the received thumbnail image data is processed by the image processing unit 210 and displayed as a list on the display unit 211. In step S404, a cursor display indicating that the image is an operation target is displayed superimposed on the first thumbnail image.

  In step S405, the transfer destination device 200 determines whether the user has completed selection of transfer data. The selection completion operation is detected by detecting whether or not a predetermined key of the operation unit 212 of the transfer destination device 200 is operated by the user or a predetermined button display on the touch panel is touched by the user. Do. It should be noted that detection of user operations in the following description is performed by detecting user operations on the operation unit 212 in the same manner, and description thereof is omitted.

  Since no transfer data has been selected yet in the description so far, the process normally proceeds to step S406. When the selection completion operation by the user is detected, the process proceeds to step S418, where the transfer source device 100 is notified of the completion of the transfer data selection process via the medium distance wireless communication, and a data transfer process (to be described later) Go to FIG. If the selection completion operation by the user has not been detected, the process proceeds to step S406, and it is determined whether or not the user has performed a cursor movement operation to change the operation target image. If a cursor movement operation by the user is detected, the process proceeds to step S407, where the cursor display is moved on the destination thumbnail image according to the user operation, and the process proceeds to step S408. If a cursor movement operation by the user is not detected, step S407 is not executed, and the process proceeds to step S408.

  In step S408, the transfer destination device 200 determines whether or not the user has performed a reproduction operation on the operation target image (the thumbnail image on which the cursor is superimposed). As for the playback operation, in addition to normal video playback, special playback such as fast forward and reverse playback may be selected. In that case, in the playback processing described later, video playback is performed by a playback method corresponding to the user operation. And When the reproduction operation by the user is not detected, the process proceeds to step S415 described later. When a reproduction operation by the user is detected, the process proceeds to step S409, and reproduction processing of moving image data corresponding to the operation target image (thumbnail image on which the cursor is superimposed) is performed via the medium-range wireless communication. Request to 100. Although details will be described later, when the transfer source device 100 receives the playback processing request from the transfer destination device 200, the transfer source device 100 executes the playback processing of the corresponding moving image data and transmits the stream playback data of the image via the medium range wireless communication The data is transmitted to the transfer destination device 200. As will be described later, this stream reproduction data may be data obtained by reducing the number of pixels and the frame rate for previewing, or only a part of moving image data.

  In step S410, the transfer destination device 200 determines whether or not reception of stream reproduction data from the transfer source device 100 has started. If reception of stream reproduction data has not started, the process returns to step S409 to continue the reproduction request. When the reception of the stream reproduction data is started, the process proceeds to step S411, where the received stream reproduction data is processed by the stream reception unit 209, and further the display processing is performed by the image processing unit 210, which is displayed on the display unit 211.

  In step S <b> 412, the transfer destination device 200 determines whether or not the user has performed a reproduction stop operation. When the cancel operation by the user is detected, the process proceeds to step S417, the transfer source device 100 is requested to cancel the reproduction process, and the process proceeds to step S414. If no canceling operation by the user has been detected, the process proceeds to step S413, and it is determined whether or not the moving image has been reproduced to the end. If playback is in progress, the process returns to step S411 to continue playback and display of moving images. If it has been reproduced to the end, the process proceeds to step S414, and a thumbnail image list display is displayed on the display unit 211 as in step S403.

  In step S415, the transfer destination device 200 determines whether or not the user has performed an operation of determining the operation target image (thumbnail image on which the cursor is superimposed) as the transfer target data. If the determination operation by the user is not detected, the process returns to step S405. When the determination operation by the user is detected, the process proceeds to step S416, and in order to store that the operation target image is determined as the transfer target, the identification ID information corresponding to the image is stored in the memory 202 as the transfer target. To remember. Then, it returns to step S405 and repeats the process described above until a user performs selection completion operation.

  Next, processing during selection of moving image data in the transfer source device 100 will be described with reference to the flowchart of FIG. Similar to the description of FIG. 4, the following processing is performed via the mid-range wireless communication established in the communication start processing described with reference to FIG. 3. The processing shown in FIG. 5 is realized by the microcomputer 101 of the transfer source device 100 executing a program.

  In step S <b> 501, the transfer source device 100 accepts a processing request transmitted from the transfer destination device 200 via medium-range wireless communication. In step S502, the transfer source device 100 determines whether a transfer request for thumbnail image data stored in the transfer source device 100 has been received. If the thumbnail image data transfer request has not been received, the process returns to step S501 to continue accepting the processing request. When the thumbnail image data transfer request is received, the process proceeds to step S503, and the requested thumbnail image data is transferred to the transfer destination device 200 via the medium-range wireless communication.

  In step S504, the transfer source device 100 determines whether or not the transfer of all requested thumbnail image data has been completed. If transfer of all the requested thumbnail image data has not been completed, the process returns to step S503 to continue the transfer process. When the transfer of all the requested thumbnail image data is completed, the process proceeds to step S505, and a processing request transmitted from the transfer destination device 200 is accepted again.

  In step S <b> 506, the transfer source device 100 determines whether a transfer data selection processing end signal from the user has been received from the transfer destination device 200. When the selection process end signal is received, the process proceeds to a data transfer process (FIG. 7) described later. If the selection processing end signal has not been received, the process advances to step S507 to determine whether or not a moving image data reproduction request signal has been received from the transfer destination device 200. If the video data reproduction request signal has not been received, the process returns to step S505 to accept the processing request transmitted from the transfer destination device 200 again. If a reproduction request for moving image data is received, the process proceeds to step S508, where the requested moving image data is reproduced, and the reproduction image is processed by the stream transmission unit 109 to perform medium-range wireless communication as stream reproduction data. To the transfer destination device 200. The playback process here may be normal video playback or special playback such as fast-forward or reverse playback. The playback process may be performed according to the playback process request from the transfer destination device 200. I do. At this time, the transfer source device 100 can also reduce the number of pixels and the frame rate of the stream reproduction data, or can transmit only a part of the image data to the transfer destination device 200 as the stream reproduction data. By doing so, it is possible to reduce the amount of data communication by medium-range wireless communication, so that the user of the transfer destination device 200 can quickly browse a video for grasping rough contents although the image quality is somewhat inferior. can do.

  In step S509, the transfer source device 100 determines whether or not a moving image data reproduction stop signal has been received from the transfer destination device 200. When the reproduction stop is received, the process proceeds to step S511, the moving image reproduction is stopped, and the process returns to step S505. If the reproduction stop has not been received, the process proceeds to step S510, and it is determined whether or not the reproduction of the moving image being reproduced has been completed. If playback is in progress, the process returns to step S508 to continue playback of the moving image. If it has been played back to the end, the process proceeds to step S511, the video playback is stopped, and the process returns to step S505. Thereafter, the processing described above is repeated until a transfer data selection processing end signal is received from the transfer destination device 200.

  Next, moving image data transfer processing in the transfer destination device 200 will be described with reference to the flowchart of FIG. The moving image data selection process described with reference to FIGS. 4 and 5 is performed via the medium-range wireless communication. However, in the transfer process here, the transfer destination apparatus 200 and the transfer source apparatus 100 are again brought close to each other, so Large-capacity moving image data can be transferred in a short time via distance wireless communication. The processing illustrated in FIG. 6 is realized by the microcomputer 201 of the transfer destination device 200 executing a program.

  Steps S601 to S604 are short-range wireless communication start processing, which is the same as the processing in steps S201 to S204 in FIG. If a communication start acceptance signal is received in step S604, the process proceeds to step S605, and the transfer source device 100 is requested to transfer moving image data via short-range wireless communication. Here, in order to designate the moving image data to be transferred, the ID information (selection information) of the moving image data to be transferred stored in step S416 in FIG. 4 is transmitted to the transfer source device 100.

  In step S606, the transfer destination device 200 determines whether reception of all moving image data to be transferred has been completed. If reception of all moving image data to be transferred has not been completed, the process returns to step S605 to continue the moving image data transfer request. When reception of all moving image data to be transferred is completed, the process proceeds to step S607, the transfer source device 100 is notified of completion of the data transfer process, and the process ends.

  Next, moving image data transfer processing in the transfer source device 100 will be described with reference to the flowchart of FIG. The moving image data selection process described with reference to FIGS. 4 and 5 is performed via the medium-range wireless communication. However, in the transfer process here, the transfer destination apparatus 200 and the transfer source apparatus 100 are again brought close to each other, so Large-capacity moving image data can be transferred in a short time via distance wireless communication. The processing illustrated in FIG. 7 is realized by the microcomputer 101 of the transfer source device 100 executing a program.

  Steps S701 to S705 are short-range wireless communication start processing, which is the same as the processing in steps S301 to S305 in FIG. In step S706, the transfer source device 100 determines whether or not a data transfer processing completion notification is received from the transfer destination device 200. When the notification of the completion of the data transfer process is received, the process ends. If a notification of completion of data transfer processing has not been received, the process proceeds to step S707, and a data transfer request transmitted from the transfer destination device 200 via short-range wireless communication is accepted.

  In step S708, the transfer source device 100 determines whether or not ID information of moving image data to be transferred has been received from the transfer destination device 200. If the ID information of the moving image data to be transferred has not been received, the process returns to step S707 to continue accepting the data transfer request. When the ID information of the moving image data to be transferred is received, the process proceeds to step S709, and the moving image data corresponding to the received ID information is transferred to the transfer destination device 200.

In step S710, the transfer source device 100 determines whether transfer of the requested moving image data is completed. If transfer of the requested moving image data has not been completed, the process returns to step S709 to continue the requested moving image data transfer process. When the transfer of the requested moving image data is completed, the process returns to step S706, and the above-described processing is repeated until a data transfer processing completion signal is received from the transfer destination device 200.
Note that, before the processing of S605 and S706 in FIGS. 6 and 7, the IDs of the devices may be exchanged to determine whether the devices have already completed the processing shown in FIGS. Specific processing will be described below.

  The transfer destination device 200 transmits the ID of the transfer destination device 200 before S605. Then, the transfer source device 100 determines whether or not the received ID of the transfer destination device 200 matches the ID of the other party who performed the mid-range wireless communication shown in FIGS. If they match, a notification to that effect is transmitted to the transfer destination device 200, and the process proceeds to S706. If they do not match, a notification to that effect is transmitted to the transfer destination device 200, and the process is terminated.

  When receiving the notification that the IDs match from the transfer source device 100, the transfer destination device 200 advances the process to S605. When the notification indicating that the IDs match is not received from the transfer source device 100, the communication is with a device that has not yet completed the processes of FIGS. Therefore, the transfer destination device 200 once disconnects the short-range wireless communication and executes the process of FIG. 2 again to execute a series of sequences from the beginning.

  If the IDs do not match, the transfer source device 100 and the transfer destination device 200 may display a warning or display the ID of a device that has established medium-range wireless communication to prompt short-range wireless communication.

  By executing the series of processes described above in the transfer source device 100 and the transfer destination device 200, only the moving image data selected by the user from among the many moving image data stored in the transfer source device 100 is obtained. The data can be transferred to the transfer destination device 200. At this time, first, the user brings the devices 100 and 200 close to each other and starts communication by short-range wireless communication, and then establishes and transmits ID information and authentication information for performing medium-range wireless communication by short-range wireless communication. By performing the above, complicated registration and authentication operations can be made unnecessary. Then, in a state in which the medium distance wireless communication is established, the moving image data to be transferred is selected through the medium distance wireless communication or the moving image specified by the user is streamed by the operation on the transfer destination device 200. Can go. As a result, even if the devices 100 and 200 are not brought close to each other, the transfer data can be selected at a free place in the communication area for medium-range wireless communication. When the selection of the moving image data to be transferred is completed, the devices 100 and 200 are brought close again and the moving image data is transferred via the short-range wireless communication. Can be transferred.

100: transfer source device, 200: transfer destination device, 101, 201: microcomputer, 102, 202: memory, 103, 203: storage device, 104, 204: file transmission / reception unit, 105, 205: short-range wireless communication I / F 106, 206: Medium-range wireless communication I / F, 107, 207: Communication authentication unit, 108, 208: Decoder unit, 109: Stream transmission unit, 209: Stream reception unit, 210: Image processing unit, 211: Display unit , 212: operation unit, 120, 220: bus, 300: wireless LAN network

Claims (10)

A transfer source device that holds image data, a first wireless communication, and a transfer destination device capable of communicating by a second wireless communication that can communicate over a longer distance than the first wireless communication but has a lower communication speed. Because
Means for transmitting a transfer request for image information of image data held by the transfer source device to the transfer source device via the second wireless communication;
Means for receiving the image information from the transfer source device via the second wireless communication;
Means for transmitting selection information based on the image information to the transfer source device via the first wireless communication;
A transfer destination device comprising: means for receiving, from the transfer source device, image data related to the selection information among image data held by the transfer source device via the first wireless communication.   Means for performing establishment processing of the second wireless communication via the first wireless communication before the transmission and reception of the image information via the second wireless communication with the transfer source device; The transfer destination device according to claim 1. The image data held by the transfer source device is video data,
3. The transfer destination device according to claim 1, further comprising means for transmitting a reproduction request based on the image information to the transfer source device via the second wireless communication. A transfer destination device that can receive image data, a first wireless communication, and a transfer source device that can communicate over a longer distance than the first wireless communication but with a second wireless communication with a slower communication speed. Because
Means for receiving a transfer request of image information of image data held by the transfer source device from the transfer destination device via the second wireless communication;
Means for transmitting the image information to the transfer destination device via the second wireless communication;
Means for receiving selection information based on the image information from the transfer destination device via the first wireless communication;
Means for transmitting to the transfer destination device, via the first wireless communication, image data related to the selection information among image data held by the transfer source device. machine.   Means for performing establishment processing of the second wireless communication via the first wireless communication before transmitting / receiving the image information to / from the transfer destination device via the second wireless communication; The transfer source device according to claim 4. The image data held by the transfer source device is video data,
Means for receiving a reproduction request based on the image information from the transfer destination device via the second wireless communication;
6. The transfer source device according to claim 4, further comprising means for executing a reproduction process in response to the reproduction request.   An image data transfer system comprising the transfer destination device according to any one of claims 1 to 3 and the transfer source device according to any one of claims 4 to 6. Although the transfer source device that holds the image data and the transfer destination device that receives the image data from the transfer source device can communicate with each other over a longer distance than the first wireless communication and the first wireless communication. An image data transfer method by an image data transfer system capable of communicating by a second wireless communication having a low communication speed,
A procedure for transmitting information of image data held by the transfer source device from the transfer source device to the transfer destination device via the second wireless communication;
The transfer source device selects the transfer destination device from the image data held by the transfer source device based on the information of the image data among the image data held by the transfer source device via the first wireless communication. An image data transfer method comprising the steps of: A transfer source device that holds image data, a first wireless communication, and a transfer destination device capable of communicating by a second wireless communication that can communicate over a longer distance than the first wireless communication but has a lower communication speed. A program for controlling
Means for transmitting a transfer request for image information of image data held by the transfer source device to the transfer source device via the second wireless communication;
Means for receiving the image information from the transfer source device via the second wireless communication;
Means for transmitting selection information based on the image information to the transfer source device via the first wireless communication;
A program for causing a computer to function as means for receiving, from the transfer source device, image data held by the transfer source device according to the selection information through the first wireless communication. A transfer destination device that can receive image data, a first wireless communication, and a transfer source device that can communicate over a longer distance than the first wireless communication but with a second wireless communication with a slower communication speed. A program for controlling
Means for receiving a transfer request of image information of image data held by the transfer source device from the transfer destination device via the second wireless communication;
Means for transmitting the image information to the transfer destination device via the second wireless communication;
Means for receiving selection information based on the image information from the transfer destination device via the first wireless communication;
A program for causing a computer to function as means for transmitting, to the transfer destination device, image data related to the selection information among image data held by the transfer source device via the first wireless communication.

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