JP2009265850A - Data transfer method, data transmission device, data reception device, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly transfer data between two devices by displaying and photographing a plurality of code images. <P>SOLUTION: When a terminal 100 equipped with a display part 104 and a short-range communication part 114 transfers data to a terminal 200 equipped with a camera 216 and a short-range communication part 214, the terminal 100 divides data to be transferred into a plurality of data by prescribed data quantity units, and converts those data into code images, and successively displays the code images on the pictures, and the terminal 200 successively photographs the pictures of the terminal 100 by the camera 216, and restores the data of each code image based on the photographic result. In this case, the terminal 100 and the terminal 200 set the successively display and photographic timing of the plurality of pictures by the short-range communication. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a data transfer method for transferring data from a first device having a display unit and a short-range communication unit to a second device having a photographing unit and a short-range communication unit.

  Conventionally, as means for wireless communication between two devices, there are Bluetooth (registered trademark), infrared light, wireless LAN, and the like.

  However, there is a problem that a low-cost device has a low communication speed and a high-speed device is expensive.

  Moreover, since a wire communication requires a connector, there is a problem that it is difficult to reduce the size of the terminal.

  Compared to these, the camera is a device that can handle a large amount of data at high speed, but it is specialized for images and cannot handle arbitrary data.

In Patent Document 1, a communication method and a communication system that perform communication of data of an arbitrary length by transmitting a screen configured with data as an image or a symbol and processing the data after receiving the screen as a screen are disclosed. Proposed.
JP 2003-189020 A

  According to the technique described in Patent Document 1, data communication can be performed by photographing with a camera. However, with this technique, only one-way communication from the transmission device can be performed. For this reason, it is difficult to perform communication at an optimum speed, and there is a problem that when an error occurs, desired data cannot be transferred correctly unless it is retried from the beginning.

  The present invention has been made in this background, and intends to appropriately transfer data between two devices by displaying and photographing a plurality of code images.

  A data transfer method according to the present invention is a data transfer method for transferring data from a first device having a display means and a short-range communication means to a second device having a photographing means and a short-range communication means, In the first apparatus, the data to be transferred is divided into a plurality of data of a predetermined data amount unit, converted into a code image, and sequentially displayed on the screen by a display means. In the second apparatus, the photographing means Thus, the screen of the first device is sequentially photographed, and the data of each code image is restored based on the photographing result. At that time, sequential transfer timings for a plurality of screens are taken by short-range communication between the first device and the second device. As a result, the first device can sequentially display and switch the screen at an appropriate timing, and the second device can perform shooting at an appropriate timing. Here, the appropriate timing is a timing that is not too early and not too late.

  A data transmission apparatus according to the present invention includes a display means for displaying a screen including a code image, a short-range communication means for performing short-range communication between a partner apparatus for transferring data, and data to be transferred as predetermined data. A converting unit that divides the data into a plurality of data in quantity units and converts each divided data into a code image; and a screen that includes the code image in response to successive requests received from the counterpart device via the short-range communication unit. Interface control means for displaying on the display means and notifying the counterpart apparatus that the screen has been displayed by the short-range communication means.

  The data receiving device according to the present invention includes a short-range communication unit that performs short-range communication with a partner device that receives data, and the partner device according to sequential notification from the partner device via the short-range communication unit. Imaging means for photographing the display screen of the apparatus, data restoration means for restoring data from the photographing results of the plurality of screens photographed by the photographing means, and combining the restored data, and photographing of the screen are completed Interface control means for notifying the counterpart apparatus by the short-range communication means.

  The present invention can also be understood as a computer program executed in each of the data transmission device and the data reception device.

  According to the present invention, when transferring data between two devices by displaying and photographing a code image, a communication error occurs by taking sequential transfer timings for a plurality of screens by short-range communication between the two devices. It is possible to reduce the possibility of occurrence of data and perform data transfer at an appropriate speed.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram for explaining the concept of the communication method of the present invention. This communication method is executed between the mobile terminal A100 and the mobile terminal B200 as the first and second devices.

  The portable terminal A includes a display unit 104 and a short-range communication unit 114 having a display screen capable of displaying information such as a two-dimensional code.

  On the other hand, the mobile terminal B includes a camera 216 that captures a display screen of the mobile terminal A and a short-range communication unit 214. The short-range communication units 114 and 214 of both portable terminals A and B can perform two-way wireless communication.

  The second device with a camera is preferably a portable terminal, but the first device that transmits data on the display screen does not necessarily have to be portable. Of course, both portable terminals may be devices with cameras.

  FIG. 2 is a block diagram showing a schematic hardware configuration inside the mobile terminal 100.

  The mobile terminal 100 includes a control unit 101, a communication unit 103, a display unit 104, an operation unit 105, a storage unit 106, a sound processing unit 110, and a speaker 111 connected to the sound processing unit 110, which are connected to each other via a bus 115. , A microphone 112, and a short-range communication unit 114. An antenna 113 is connected to the short-range communication unit 114.

  The control unit 101 includes a CPU and the like, and controls each unit of the mobile terminal 100. In the present embodiment, it also functions as an interface control unit that controls the interface with portable terminal 200 that is the counterpart device.

  The communication unit 103 includes an RF unit, a modulation circuit, and the like, and performs wireless communication for calls, mails, WEB data, and the like with the base station via the antenna 102.

  The display unit 104 provides a display interface for presenting visible information to the user, and includes a display device such as an LCD or an organic EL.

  The operation unit 105 provides an input interface for a user to input instructions and data, and includes various operation keys such as a numeric keypad, a cursor movement key, a call key, and a power key.

  The storage unit 106 includes a storage device such as a ROM, a RAM, and an HDD, and stores programs such as an OS and various applications executed by the CPU, and various data. The ROM may include a rewritable nonvolatile memory such as a flash memory. This storage unit 106 also stores data to be transferred.

  The audio processing unit 210 includes an audio encoder, decoder, DA converter, AD converter, and the like, and performs audio output to the speaker 111 (including earphones) and audio input from a microphone.

  The near field communication unit 114 includes a wireless communication unit such as a wireless LAN or Bluetooth (registered trademark).

  Note that the communication unit 103 and the audio processing unit 110 are elements that are not directly required in the present invention.

  FIG. 3 is a block diagram showing a schematic hardware configuration inside portable terminal 200 in the present embodiment.

  The mobile terminal 200 includes a control unit 201, a communication unit 203, a display unit 204, an operation unit 205, a storage unit 206, a sound processing unit 210, and a speaker 211 connected to the sound processing unit 210, which are connected to each other via a bus 215. , A microphone 212, a short-range communication unit 214, a camera 216, and a shooting control unit 217. An antenna 123 is connected to the short-range communication unit 214. A camera 216 is connected to the photographing control unit 217.

  The control unit 201 includes a CPU and the like, and controls each unit of the mobile terminal 200. In the present embodiment, the control unit 201 also functions as a data restoration unit that restores the two-dimensional code to the original data and an interface control unit that controls the interface with the portable terminal 100 that is the counterpart device.

  The communication unit 203 includes an RF unit, a modulation circuit, and the like, and performs wireless communication for calls, mails, WEB data, and the like with the base station via the antenna 202.

  The display unit 204 provides a display interface for presenting visible information to the user, and includes a display device such as an LCD or an organic EL.

  The operation unit 205 provides an input interface for a user to input instructions and data, and includes various operation keys such as a numeric keypad, a cursor movement key, a call key, and a power key.

  The storage unit 206 includes storage devices such as a ROM, a RAM, and an HDD, and stores programs such as an OS and various applications executed by the CPU, and various data. The ROM may include a rewritable nonvolatile memory such as a flash memory. Image data captured by the camera 216 is also stored in the storage unit 206.

  The audio processing unit 210 includes an audio encoder, decoder, DA converter, AD converter, and the like, and performs audio output to the speaker 211 (including earphones) and audio input from a microphone.

  The camera 216 includes an image sensor such as a CMOS or a CCD, and constitutes a photographing unit for obtaining digital image data of a photographed subject.

  The near field communication unit 214 includes a wireless communication unit such as a wireless LAN or Bluetooth (registered trademark), and can communicate with the near field communication unit 114 of the mobile terminal 100.

  Note that the communication unit 203 and the audio processing unit 210 are elements that are not directly required in the present invention.

  With reference to FIG. 4, an example of a two-dimensional code as image data serving as a data transfer medium in the present embodiment will be described. As a data encoding method, for example, a two-dimensional code such as a QR code (trademark) can be considered. FIG. 4A shows an example in which a single code is displayed on the display screen, and FIG. 4B allows a plurality of code images to be included in one screen, and a plurality of codes are displayed on the display screen. The example which displayed the image simultaneously is shown. According to the latter, it is possible to increase the transfer data amount per one screen, that is, one photographing. When a plurality of code images are arranged in one screen, each piece of divided data may include positioning information (for example, a serial number) of the divided data in the entire data. Further, when the arrangement positions of the code images are ordered in advance, it is not necessary to include the positioning information in the divided data.

  FIG. 5 is a sequence diagram showing a specific procedure example of data transfer between portable terminals 100 and 200 in the present embodiment.

  When data is transferred from the mobile terminal 100 to the mobile terminal 200, first, the mobile terminal 100 selects data stored in the storage unit 106 according to the user's operation (S11), and waits for data transmission. (S12). On the other hand, the portable terminal 200 starts a code image reading process for receiving data in accordance with a user operation (S21). As a premise of this data transfer, both portable terminals are arranged in a mutual positional relationship so that the display screen of the portable terminal 100 can be properly photographed by the camera of the portable terminal 200.

  As an initial operation, the mobile terminal 100 communicates with the short-range communication unit 114 of the mobile terminal 100 through the short-range communication unit 214 and requests detailed information on the data (S22). Note that the various requests and notifications indicated by the mutual arrows between the mobile terminal 100 and the mobile terminal 200 in the sequence diagram of FIG. 5 are all performed by communication by the short-range communication unit.

  In response to the request for the detailed information on the data, the mobile terminal 100 notifies the mobile terminal 200 of the detailed information (S13). The detailed data information includes information on the size of the entire data to be transferred and the total number of screens (total number of screens to be displayed sequentially from now on). When a plurality of code images are arranged on one screen, information on how many code images are arranged on one screen (and how to arrange them) may be exchanged.

  The portable terminal 100 also performs data division processing for dividing the transfer target data (S14). The division unit is a data amount unit that can be represented by one two-dimensional code.

  Next, an output request for the first screen is transmitted from the portable terminal 200 to the portable terminal 100 (S23). The portable terminal 100 converts each divided data into a two-dimensional code, and outputs (that is, displays and outputs) a code image including the two-dimensional code for one screen to the display unit 104 (S15). Notification is made (S16). In response to this notification, the imaging control unit 217 of the portable terminal 200 captures the first screen (S24), and outputs a data restoration request for the imaging result to the data restoration unit (S25). In response to this request, the data restoration unit executes data restoration processing (S27), and when the restoration is completed, notifies the imaging control unit 217 of the result (S28).

  The shooting control unit 217 requests the portable terminal 100 to output the second screen after shooting the first screen (S26). This request is an opportunity to switch the screen displayed on the mobile terminal 100 to the next screen. In response to this request, the mobile terminal 100 outputs (that is, displays) the second screen (S17), and notifies the mobile terminal 200 to that effect (S18).

  After receiving the second screen output notification from the mobile terminal 100, the shooting control unit 217 of the mobile terminal 200 executes shooting of the second screen (S28).

  As described above, the sequential display of each screen on the mobile terminal 100 and the sequential shooting of the screen on the mobile terminal 200 are sequentially executed while timing is achieved by sending and receiving the control signal by the short-range communication between the both mobile terminals. To go. When the planned full-screen shooting is completed, the portable terminal 200 transmits a process completion notification indicating that the data transfer process is completed to the portable terminal 100 (S30).

  If there is a code image that could not be restored during the above process, the mobile terminal 100 may already display the next screen. In this case, the code image is again displayed from the mobile terminal 200. Retry can be performed by requesting the output of the screen including.

  In this way, a plurality of code images coded in the mobile terminal 100 are taken into the mobile terminal 200, restored, and combined in a specific order, so that the mobile terminal 200 can display the display screen from the mobile terminal 100. It is possible to transfer data to.

  In the present invention, since data is restored from visible information called an image, there is a possibility that the confidentiality of the data may be lost due to voyeurism or the like, but in the present invention, control information is exchanged by short-range communication. It is possible to enhance confidentiality by exchanging encryption keys in communication and encrypting data.

  The preferred embodiments of the present invention have been described above, but various modifications and changes other than those mentioned above can be made.

  For example, the example in which the mobile terminal 100 notifies the mobile terminal 200 of the total number of screens to be transmitted as an initial operation has been described. However, when the mobile terminal 100 transmits the last screen or before or after the transmission, You may make it notify to the portable terminal 200. FIG. In this case, it is not necessary to notify the total number of the screens in the initial operation.

  The example in which the number of code images included in one screen is notified from the mobile terminal 100 to the mobile terminal 200 as an initial operation has been described. However, when the mobile terminal 200 can identify an arbitrary number of code images from the photographing result, There is no need to make a notification.

  Note that the present invention also includes a computer program for realizing the functions described in the above embodiments by a computer and a computer-readable recording medium for supplying the program. Examples of computer-readable recording media include magnetic storage media (flexible disks, hard disks, magnetic tapes, etc.), optical disks (magneto-optical disks such as MO and PD, CD-ROM, CD-R, CD-RW, DVD-). ROM, DVD-RAM, DVD-R, DVD-RW, DVD + RW, etc.), semiconductor storage, paper tape, and the like.

It is a figure for demonstrating the concept of the communication method of this invention. FIG. 2 is a block diagram showing a schematic hardware configuration inside a first portable terminal in FIG. 1. It is the block diagram which showed the schematic hardware structure inside the 2nd portable terminal in FIG. It is the figure which showed the example of the two-dimensional code as image data in embodiment of this invention. It is a sequence diagram showing the specific example of a procedure of the data transfer between both the portable terminals in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Control part, 102 ... Antenna, 103 ... Communication part, 104 ... Display part, 105 ... Operation part, 106 ... Memory | storage part, 110 ... Sound processing part, 111 ... Speaker, 112 ... Microphone, 114 ... Short distance communication part, DESCRIPTION OF SYMBOLS 115 ... Bus, 123 ... Antenna, 200 ... Portable terminal, 201 ... Control part, 202 ... Antenna, 203 ... Communication part, 204 ... Display part, 205 ... Operation part, 206 ... Memory | storage part, 210 ... Audio | voice processing part, 211 ... Speaker, 212 ... Microphone, 214 ... Near field communication unit, 215 ... Bus, 216 ... Camera, 217 ... Shooting control unit

Claims (8)

A data transfer method for transferring data from a first device provided with a display means and a short-range communication means to a second device provided with a photographing means and a short-range communication means,
In the first device, the data to be transferred is divided into a plurality of data of a predetermined data amount unit, converted into a code image and sequentially displayed on the screen by the display means,
In the second device, the screen of the first device is sequentially photographed by the photographing means, and the data of each code image is restored based on the photographing result,
A data transfer method for taking sequential transfer timings for a plurality of screens by short-range communication between a first device and a second device. The data transfer method according to claim 1,
(A) dividing the data to be transferred by the first device into a plurality of data of a predetermined data amount unit;
(B) the first device converting each divided data into a code image;
(C) requesting the second device to display and output a screen including a code image to the first device by short-range communication;
(D) in response to the request, the first device displays a screen including a code image, and notifies the second device to that effect by short-range communication when the display is completed;
(E) the second device taking a picture of the screen in response to the notification, and notifying the first device to that effect by short-range communication when the photographing is completed;
(F) the second device restoring the data of each code image based on the imaging result;
(G) a step of switching a screen by the first device in response to a notification of completion of photographing, and notifying the second device by short-range communication when the display is completed;
(H) repeating steps (e) to (g) until display of the entire screen to be transferred is completed;
(I) combining the data restored from the imaging results of a plurality of screens captured by the second device.   3. The data transfer method according to claim 2, further comprising a step of notifying the second device of a total number of screens including code images, which are sequentially displayed, by the short distance communication when the data is transferred.   A step of allowing a plurality of code images to be included in one screen and notifying the number of code images included in one screen to the second device by short-range communication when transferring data; The data transfer method according to claim 2 or 3, further comprising: Display means for displaying a screen including a code image;
Short-range communication means for performing short-range communication with a partner device for transferring data;
Conversion means for dividing the data to be transferred into a plurality of data of a predetermined data amount unit, and converting each divided data into a code image;
In response to successive requests received from the counterpart device via the short-range communication means, a screen including a code image is displayed on the display means, and the fact that the screen has been displayed is displayed to the counterpart device by the short-range communication means. A data transmission device comprising: an interface control means for notifying. Short-range communication means for performing short-range communication with a partner device that receives data;
Photographing means for photographing a display screen of the counterpart device in response to successive notifications from the counterpart device via the short-range communication means;
Data restoration means for restoring data from the photographing results of a plurality of screens photographed by the photographing means, and combining the restored plurality of data;
An interface control means for notifying the counterpart apparatus by the short-range communication means that the screen has been photographed. A computer program executed in a data transmission device,
A display step for displaying a screen including a code image;
Dividing the data to be transferred into a plurality of data of a predetermined data amount unit, and converting each divided data into a code image;
In response to successive requests received from the partner device by short-range communication, a screen including a code image is displayed on the display unit, and the computer is executed to notify the partner device that the screen has been displayed by short-range communication. Computer program to let you. A computer program executed in a data receiving device,
Photographing the display screen of the counterpart device in response to successive notifications by short-range communication from the counterpart device;
Restoring the data from the captured results of the plurality of captured images, and combining the restored plurality of data;
A computer program for causing the computer to execute a step of notifying the partner apparatus that the screen has been imaged by short-range communication.

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