JP5495533B2 - Communication terminal - Google Patents

Communication terminal Download PDF

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JP5495533B2
JP5495533B2 JP2008278898A JP2008278898A JP5495533B2 JP 5495533 B2 JP5495533 B2 JP 5495533B2 JP 2008278898 A JP2008278898 A JP 2008278898A JP 2008278898 A JP2008278898 A JP 2008278898A JP 5495533 B2 JP5495533 B2 JP 5495533B2
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terminal
communication terminal
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JP2010109621A (en
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淳一 氏井
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京セラ株式会社
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  The present invention relates to a communication terminal having a short-range wireless communication function.

  An increasing number of portable communication terminals (for example, mobile phones, PDAs, etc.) having a function of reproducing multimedia contents such as music and video. Usually, such a communication terminal is a device in which users personally view content as shown in FIG. 7, so that two users can enjoy the same content (for example, music, video, etc.) As shown in FIG. 8, the earphone connected to one communication terminal needs to be shared by two people one ear at a time. In the case of FIG. 8, it is difficult for two users to share the small screen of the communication terminal, and furthermore, each user cannot enjoy the acoustic (music / voice) stereo effect.

  In recent years, with improvements in the functions of communication terminals, even if the contents of the communication terminals are not held, short-range wireless communication such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 related standards and Bluetooth (registered trademark) Using the function, it is also possible to receive and play back content from other portable terminals (FIG. 9). In this way, by distributing content held by a certain communication terminal to other communication terminals using the short-range wireless communication function, a plurality of users can enjoy the same content on their communication terminals.

  When content sharing (content sharing) as described above is performed between a plurality of communication terminals, it is desirable that the reproduction timings of the contents in each communication terminal are synchronized. This is because, by such synchronized playback, for example, each user can enjoy the same music and video at the same timing, so that it is expected to improve the sense of unity between users and the realism received from the video. In order to synchronize and reproduce content on each communication terminal, it is necessary to adjust the reproduction order and reproduction timing of the shared content between the communication terminals.

As such shared content synchronized playback technology, for example, content data individually possessed by each terminal (controller / player) between a controller terminal such as a PDA and a plurality of player terminals such as a mobile phone and a digital camera is provided. A synchronous playback method has been proposed in which content data is shared and played back simultaneously on the controller terminal and a plurality of player terminals in accordance with the playback data order list generated by the controller terminal (for example, Patent Document 1).
JP 2007-13704 A

  However, in the above-described synchronized playback method, regarding the problem specific to the portable communication terminal, the response to the case where the receiving communication terminal leaves the distribution area of the distributing communication terminal during the synchronized playback is not considered. There was a problem. In particular, if the receiving terminal leaves the distribution area of the distribution side communication terminal during synchronous reproduction, the content reproduction ends at the reception side terminal.

In order to solve the above-mentioned problems, the communication terminal on the content receiving side of the present invention is:
A storage unit for storing data that can be reproduced and viewed;
A near field communication unit that communicates with other terminals by near field communication,
After the short-range wireless communication unit receives all the data to be synchronized and reproduced between the own terminal and the other terminal from the other terminal, and the storage unit stores the received data, the short-range wireless communication unit A control unit that controls to start synchronous reproduction of the stored data with the other terminal based on a synchronous reproduction signal received from the other terminal;
The control unit further includes:
When the short-range wireless communication unit is receiving the synchronous reproduction signal, the stored data is controlled to be synchronously reproduced with the other terminal based on the synchronous reproduction signal,
When the short-range wireless communication unit no longer receives the synchronous reproduction signal, control to continue to reproduce the stored data without synchronizing with the other terminal ,
The control unit, when the short-range wireless communication unit does not receive the synchronous reproduction signal, when reproducing the data that started the synchronous reproduction without synchronizing with the other terminal, The wireless communication unit controls the other terminal to transmit a synchronization request signal in order to resume synchronous reproduction for the data being reproduced without synchronization.
It is characterized by that.

Furthermore, in order to solve the above-described problems, a communication terminal on the content distribution side of the present invention is
A near field communication unit that communicates with other terminals by near field communication,
The short-range wireless communication unit transmits all the data that can be played back and played in the synchronized playback between the own terminal and the other terminal to the other terminal, and after the transmission of the data is finished, the playback of the data in the other terminal A control unit that controls to transmit a synchronized playback signal for synchronizing with the other terminal to the other terminal,
The control unit further includes:
When the short-range wireless communication unit has received a reception confirmation signal transmitted from the other terminal, control to reproduce the data synchronously with the other terminal,
When the short-range wireless communication unit does not receive the reception confirmation signal transmitted from the other terminal, control to continue to play the data without synchronizing with the other terminal ,
The control unit transmits the synchronous reproduction signal when the short-range wireless communication unit receives the reception confirmation signal transmitted from the other terminal, and transmits the synchronous reproduction signal when the reception confirmation signal is not received. When the transmission of the signal is controlled to stop the transmission of the synchronous reproduction signal, the short-range wireless communication unit synchronizes the reproduction of the data from the other terminal with the other terminal. When receiving a synchronization request signal for controlling, to control to resume the synchronized playback with the other terminal based on the synchronization request signal,
It is characterized by that.

  According to the present invention, even when the distribution-side terminal and the reception-side terminal leave the distribution area during synchronous reproduction, both communication terminals can continue content reproduction asynchronously.

  Hereinafter, a communication terminal according to an embodiment of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a functional block diagram of a communication terminal 100 according to an embodiment of the present invention. The communication terminal 100 transmits / receives data to / from a transmission / reception unit transmission / reception unit 1 for making a call using a mobile phone network with a third party, and another communication terminal 200 located at a short distance such as Bluetooth (registered trademark). Short-distance transmission / reception unit for transmitting / receiving unit 2 (near-distance wireless communication unit), key input unit 3 (for example, numeric key / up / down key) used for mode change of communication terminal 100, telephone number, character input, address book Storage unit 4 for storing data, own terminal profile, music and moving image content data, microphone 5 for inputting voice, and all characters, pictures, and image information such as the status and status of communication terminal 100 to the user Audio data obtained from the transmission / reception unit 1 via the display unit 6 (for example, a liquid crystal display) and the mobile phone network, music and audio data stored in the storage unit 4, A speaker 7 for informing the user of music and voice obtained from the near-field transmission / reception unit 2, a music playback unit 8 for reproducing music data from the storage unit 4 and the near-field transmission / reception unit 2, Audio data obtained from the transmission / reception unit transmission / reception unit 1 via the mobile phone network, music and voice data stored in the storage unit 4, music and voice obtained from the short-distance transmission / reception unit transmission / reception unit 2 to the user with earphones Through the earphone unit 9 for notification via the storage unit 4, the moving image reproduction unit 10 that reproduces the moving image data from the storage unit 4 and the short-distance transmission / reception unit transmission / reception unit 2, and the display unit 6 to display time. The time measuring unit 11 and the control unit 50 that supervises these controls. The transmission / reception unit 1 includes, for example, any suitable interface device that supports transmission / reception of radio signals (mobile radio communication) of a cellular phone network such as CDMA EV-DO. 11g and Bluetooth (registered trademark) and other suitable interface devices that support transmission / reception of short-range wireless signals (short-range wireless communication). In addition, the music playback unit 8, the video playback unit 10, the time measurement unit 11, and the control unit 50 are configured by any suitable processor such as a CPU (Central Processing Unit), for example. Each function of the moving image reproduction unit 10, the time measurement unit 11, and the control unit 50 is executed by software executed on the processor or a dedicated processor (for example, DSP (digital signal processor)) specialized for processing of each function. Can be configured. Note that in the communication terminal 100 according to the present invention, the music playback unit 8, the video playback unit 10, the time measurement unit 11, and the control unit 50 may be configured by independent processors, and the music playback unit 8 and the video It is also possible to configure the reproduction unit 10 as software as one function executed by the control unit 50. The storage unit 4 includes, for example, a volatile memory (SRAM or the like), a nonvolatile memory (EEPROM or the like), or other suitable storage medium.

  The short-range transmission / reception unit transmission / reception unit 2 is preferably a method that can be distributed only to registered terminals that are not distributed to an unspecified number of terminals. In addition, since registration (authentication) of the terminal itself is troublesome, if the communication by the short-range transmission / reception unit transmission / reception unit 2 is associated with a terminal-specific number registered in the address book, such as a telephone number or an e-mail address. Usability is improved.

  FIG. 2 shows a situation where user A (distribution side) and user B (reception side) are enjoying content (for example, music) at the same time on the communication terminal 100 and the communication terminal 200, respectively. Hereinafter, it is a figure which shows the processing sequence in the case of performing synchronous reproduction | regeneration between the communication terminal 200 (henceforth "reception side communication terminal 200") and user B's communication terminal 200 (henceforth "reception side communication terminal 200"). The configuration of the distribution side communication terminal 100 is as described above, and the reception side communication terminal 200 has a configuration corresponding to the distribution side communication terminal 100. That is, the receiving side communication terminal 200 includes the transmission / reception unit 1, the short distance transmission / reception unit 2, the key input unit 3, the storage unit 4, the microphone 5, the display unit 6, the speaker 7, the music playback unit 8, and the earphone. Transmission / reception unit 201, short-distance transmission / reception unit 202, key input unit 203, storage unit 204, microphone 205, display unit 206, speaker 207, music corresponding to the unit 9, the moving image reproduction unit 10, the time measurement unit 11, and the control unit 50. A playback unit 208, an earphone unit 209, a moving image playback unit 210, a time measurement unit 211, and a control unit 250 are provided.

  The user A performs a viewing operation of music data stored in advance in the storage unit 4 through the key input unit 3 while referring to, for example, a music list displayed on the display unit 6. When the control unit 50 acquires a user instruction through the key input unit 3, the control unit 50 sends a signal to the music playback unit 8 to perform playback processing of music data designated by the user. The music playback unit 8 acquires music data designated by the user from the storage unit 4 and performs playback processing, and notifies the user A of the playback processing result (music content) through the speaker 7 or the earphone unit 9. Normally, when the earphone is inserted into the earphone unit 9, the music notification is performed through the earphone unit 9, and when the earphone is not inserted into the earphone unit 9, the music notification is performed through the speaker 7. .

  When the user B approaches the user A and verbally asks the user A for permission to share music data, the user A receives the music that the distribution-side communication terminal 100 is playing back on the own terminal. An operation for authentication is performed through the key input unit 3 so as to be transferred to 200. In accordance with the input instruction of the key input unit 3, the control unit 50 performs a control to activate the short-range transmission / reception unit 2 and place the distribution-side communication terminal 100 in a standby state.

  The user B on the side who has requested sharing permission operates the key input unit 203 of his / her receiving-side communication terminal 200 and activates the short-range transmission / reception unit 202 by the control unit 250. The short-range transmission / reception unit 202 scans the surroundings for communication terminals that support the same short-distance transmission / reception method, and the control unit 250 causes the display unit 206 to display a list of detected communication terminals. When the user B selects the distribution-side communication terminal 100 from the list on the display unit 206 using the key input unit 203, the control unit 250 transmits the profile data stored in the storage unit 204 (for example, the self-transmission unit 202). A part of the terminal phone number, e-mail address, terminal owner's name, etc.) is transmitted to the delivery-side communication terminal 100 as a passkey (eg, PIN code). When there is only one communication terminal detected by the short-range transmission / reception unit 202, the control unit 250 does not wait for selection of the distribution side communication terminal 100 by the user B, and passes a pass key to the distribution side communication terminal 100. It can also be sent.

  In the distribution-side communication terminal 100, the control unit 50 acquires the passkey from the reception-side communication terminal 200 through the short-range transmission / reception unit 2, and the user B uses the predetermined data (stored in the storage unit 4) from the passkey. For example, it is determined whether or not the user is registered in the information of user B held in advance by user A such as an address book. As a result of the determination, for example, if it can be confirmed that the user is registered in the address book, the control unit 50 allows the user B to view the music data that the user A is viewing. Then, transfer of all music data to be synchronously reproduced to the receiving communication terminal 200 is started. At this time, the content data to be transferred can be defined by the content data transfer conditions on the distribution side. For example, when the user A is viewing music, the control unit 50 is not limited to the data until the end of the currently viewed song or the currently viewed song, but includes all the songs included in the album including the currently viewed song. The data can be transferred to the receiving communication terminal 200. Note that the “all” data to be synchronously played here is not limited to the data amount in a certain unit such as a song unit or an album unit in the case of music data, for example, but a part of a certain song, for example Note that it is defined by various quantities, such as only data and a certain percentage of the entire album.

  In the receiving communication terminal 200, the control unit 250 stores all the music data transferred from the distribution side communication terminal 100 in the storage unit 204, and uses the short-range transmission / reception unit 202 to send “data” to the distribution side communication terminal 100. Send "acknowledgment". The time measuring unit 211 acquires the time information of the own terminal from the storage unit 204, and the control unit 250 includes the time information about the own terminal in the data reception confirmation and transmits the time information to the distribution side communication terminal 100.

  In the distribution-side communication terminal 100, when the time measurement unit 11 obtains the data reception confirmation from the reception-side communication terminal 200 through the short-range transmission / reception unit 2, the time information of the reception-side communication terminal 200 included in the data reception confirmation and storage The time information of the own terminal held by the unit 4 is compared, and “time correction data” for correcting the time lag between the distribution side communication terminal 100 and the reception side communication terminal 200 is created. Furthermore, the control unit 50 acquires the playback time of the content that the user A is viewing, and what part of the content should be started to be played from which time in the receiving-side communication terminal 200 for synchronized playback. “Playback time data” is generated. The control unit 50 creates a “synchronized reproduction signal” including “time correction data” and “reproduction time data”, and transmits it to the receiving communication terminal 200 through the short-range transmission / reception unit 2.

  In the receiving communication terminal 200, when the time measurement unit 211 acquires the synchronous reproduction signal from the distribution side communication terminal 100 through the short-range transmission / reception unit 202, the storage unit 204 uses the “time correction data” included in the synchronous reproduction signal. The time stored in is updated to synchronize with the time of the delivery side communication terminal 100. Further, the music playback unit 208 determines from the distribution-side communication terminal 100 stored in the storage unit 4 based on the “reproduction time data” included in the synchronous reproduction signal, based on the designated content position and the designated reproduction start time. Playback of the transferred content data is started. In this way, time synchronization between terminals is first performed between the distribution-side communication terminal 100 and the reception-side communication terminal 200 using “time correction data”, and further, content reproduction timing is synchronized using “playback time data”. Thus, the user A and the user B can enjoy the same content in synchronization.

  The distribution-side communication terminal 100 continues to transmit the synchronous reproduction signal in order to adjust the synchronous reproduction continuously after transmitting the synchronous reproduction signal. Note that the second synchronized reproduction signal may include only reproduction time data, for example, without including time correction data. The receiving communication terminal 200 finely adjusts the synchronization timing according to the synchronized reproduction signal, and transmits a reception confirmation signal indicating that the synchronized reproduction signal signal has been received to the distribution communication terminal 100. The reception confirmation signal may include time information of the receiving communication terminal 200. As described above, the synchronization is continuously performed between the distribution-side communication terminal 100 and the reception-side communication terminal 200 using the simultaneous reproduction signal and the reception confirmation signal. It is possible to correct misalignment of the mute time.

  The receiving communication terminal 200 can transmit a synchronization request signal to the distributing communication terminal 100 in order to cause the distributing communication terminal 100 to perform synchronous reproduction based on the timing of the own terminal. The synchronization request signal includes, for example, time information indicating which part of the content should be reproduced from which time with reference to the time of the receiving communication terminal 200. The distribution-side communication terminal 100 that has received the synchronization request signal performs synchronized playback of content in accordance with the reception-side communication terminal 200 according to time information included in the synchronization request signal, and receives information included in the synchronization playback signal. It corrects according to the side communication terminal 200. FIG.

  When the synchronous viewing between the distribution side communication terminal 100 and the reception side communication terminal 200 is completed, the control unit 250 of the reception side communication terminal 200 displays the content distributed from the distribution side communication terminal 100 from the storage unit 204. Delete the data. For example, in the reception-side communication terminal 200, when a reproduction end instruction is given to the key input unit 203, the control unit 250 deletes the content data distributed from the distribution-side communication terminal 100 from the storage unit 204. From the viewpoint that the content data being viewed by the receiving communication terminal 200 is listening to the content data of the distributing communication terminal 100, the content data is retained for a long time if the data not being viewed is not deleted. The reason for this is that it will deviate from the meaning of sharing.

  Thereafter, in the situation where the distribution side communication terminal 100 and the reception side communication terminal 200 are synchronously reproducing the content according to the sequence shown in FIG. 2, the reception side communication terminal 200 moves out of the distribution range of the distribution side communication terminal 100 The process will be described. Note that the detailed operations in the distribution-side communication terminal 100 and the reception-side communication terminal 200 are as described above, and in the following description, each operation is simply described.

  FIG. 3 shows a sequence when the receiving communication terminal 200 moves out of the distribution area of the distributing communication terminal 100 in a state where the distributing communication terminal 100 and the receiving communication terminal 200 are reproducing contents in synchronization. FIG.

  In a situation where the user A and the user B are reproducing contents synchronously according to the sequence shown in FIG. 2, when the receiving communication terminal 200 moves out of the distribution range of the distributing communication terminal 100, the distributing communication terminal 100 Since the reception confirmation signal for the synchronous reproduction signal does not return from the communication terminal 200, power consumption can be suppressed by stopping the synchronous reproduction signal using short-range wireless communication. As a method of stopping the synchronized playback signal by the distribution side communication terminal 100, the synchronized playback signal is transmitted a preset number of times, and when the reception confirmation signal does not return from the receiving side communication terminal 200, the synchronized playback signal is stopped. The method is certain. Further, since the delivery side communication terminal 100 has not obtained the reception confirmation signal, the delivery side communication terminal 100 reproduces the content data asynchronously at the timing of its own terminal. On the other hand, when the receiving communication terminal 200 cannot receive the synchronous reproduction signal from the distribution communication terminal 100, the reception communication terminal 200 stops the communication in the short-range wireless communication and receives the content data transferred from the distribution communication terminal 100. Plays asynchronously at the timing of the terminal itself. Further, when the reproduction of the transferred content data is completed, the receiving communication terminal 200 stops the operation of the music playback unit 208 and deletes the transferred content data stored in the storage unit 204. In addition, when the user B stops the operation of the music playback unit 208 in a state where the reception side communication terminal 200 cannot receive the synchronous playback signal from the distribution side communication terminal 100, the reception side communication terminal 200 stores it in the storage unit 204 at that timing. All the transferred content data including the unviewed part that has been viewed is deleted.

  As described above, according to the embodiment shown in FIG. 3, the receiving communication terminal 200 receives all the content data to be synchronized and reproduced from the distributing communication terminal 100, stores the received data, and then distributes the received data. The synchronized reproduction of the stored data is started based on the synchronized reproduction signal received from 100, and the stored data is synchronized with the distribution side communication terminal 100 even when the synchronized reproduction signal is not received from the distribution side communication terminal 100. Therefore, the content reproduction can be continued asynchronously even when the distribution side communication other terminal 100 leaves the distribution area during the synchronous reproduction.

  In addition, the transmission side communication terminal 100 transmits all the content data to be synchronously reproduced to the reception side communication terminal 200, and after the transmission of the data is completed, the reproduction of the data in the reception side communication terminal 200 is synchronized with the own terminal. Even when the reception reproduction signal is not received from the reception side communication terminal 200, the content data is continuously reproduced without being synchronized with the reception side communication terminal 200. Therefore, even when the receiving communication other terminal 200 leaves the distribution area during the synchronous reproduction, the content reproduction can be continued asynchronously.

  FIG. 4 shows a state where the distribution-side communication terminal 100 and the reception-side communication terminal 200 are reproducing contents in synchronization, and the reception-side communication terminal 200 moves out of the distribution range of the distribution-side communication terminal 100 and then is distributed. FIG. 11 is a sequence diagram when synchronization is established from the receiving communication terminal 200 side when returning to step S2.

  In a situation where the user A and the user B are reproducing contents synchronously according to the sequence shown in FIG. 2, when the receiving communication terminal 200 moves out of the distribution range of the distributing communication terminal 100, the distributing communication terminal 100 Since the reception confirmation signal for the synchronous reproduction signal does not return from the communication terminal 200, the synchronous reproduction signal using short-range wireless communication is stopped. Further, since the delivery side communication terminal 100 has not obtained the reception confirmation signal, the delivery side communication terminal 100 reproduces the content data asynchronously at the timing of its own terminal. On the other hand, when the receiving communication terminal 200 cannot receive the synchronous reproduction signal from the distribution communication terminal 100, the reception communication terminal 200 stops the communication in the short-range wireless communication and receives the content data transferred from the distribution communication terminal 100. Play at the timing of your terminal.

  When the receiving communication terminal 200 returns to the distribution area of the distribution side communication terminal 100 again while the two communication terminals are asynchronously playing the content, the reception side user B approaches the distribution side user A and verbally Asks for permission for sharing and performs authentication between terminals. The distribution-side communication terminal 100 activates the short-range transmission / reception unit 2 to enter a standby state. The receiving communication terminal 200 activates the short-range transmission / reception unit 202 of its own terminal, selects the distribution-side communication terminal 100 from nearby devices capable of short-distance transmission / reception, and stores the profile stored in the storage unit 4 A part of the data is transmitted as a PIN code. The distribution side communication terminal 100 specifies the reception side communication terminal 200 from the address book or the like, determines whether to transfer the content data from the transfer history of the transfer content data, and transmits an authentication confirmation to the reception side communication terminal 200. Receiving side communication terminal 200 receives the authentication confirmation and transmits a synchronization request signal to distribution side communication terminal 100. The distribution side communication terminal 100 controls the music playback time of its own terminal with reference to the synchronization request signal of the reception side communication terminal 200, and transmits the synchronized reproduction signal corrected to the synchronization request signal of the reception side communication terminal 200, thereby To achieve synchronization. Further, in this sequence, the synchronization timing can be matched with that of the distribution side communication terminal 100 without matching with the reception side communication terminal 200.

  As described above, according to the embodiment shown in FIG. 4, the receiving communication terminal 200 reproduces the stored data without synchronizing with the distributing communication terminal 100. When the synchronization request signal for synchronizing the reproduction of the content data with the own terminal (reception side communication terminal 200) is transmitted, and the distribution side communication terminal 100 receives the synchronization request signal from the reception side communication terminal 200. Since the synchronized reproduction with the receiving communication terminal 200 is resumed in accordance with the synchronization request signal, resynchronization according to the reproduction timing of the receiving communication terminal 200 is possible when both communication terminals are resynchronized.

  FIG. 5 shows a distribution area after the reception side communication terminal 200 moves out of the distribution area of the distribution side communication terminal 100 in a state where the distribution side communication terminal 100 and the reception side communication terminal 200 are reproducing contents in synchronization. It is a sequence diagram at the time of taking a synchronization from the delivery communication terminal 100 side when returning to.

  In a situation where the user A and the user B are reproducing contents synchronously according to the sequence shown in FIG. 2, when the receiving communication terminal 200 moves out of the distribution range of the distributing communication terminal 100, the distributing communication terminal 100 Although the reception confirmation signal for the synchronous reproduction signal does not return from the communication terminal 200, the synchronous reproduction signal is continuously sent at regular intervals without stopping the synchronous reproduction signal using short-range wireless communication. In this case, power consumption can be reduced by stopping the short-range wireless device 2 of the distribution-side communication terminal 100 at a timing other than the synchronized playback signal transmission timing and entering the sleep state. The distribution-side communication terminal 100 continues the transmission of the synchronous reproduction signal, while the reproduction of the content is reproduced asynchronously at the timing of the own terminal because the reception confirmation signal is not obtained. On the other hand, when the receiving communication terminal 200 cannot receive the synchronous reproduction signal from the distribution side communication terminal 100, the reception side communication terminal 200 reproduces the content data transferred from the distribution side communication terminal 100 asynchronously at the timing of the own terminal. In this case, the receiving-side communication terminal 200 does not stop the short-range wireless communication.

  When the receiving communication terminal 200 returns to the distribution area of the distribution communication terminal 100 again while both communication terminals are reproducing the contents asynchronously, the reception communication terminal 200 performs synchronous reproduction from the distribution communication terminal 100. By receiving the signal and sending a reception confirmation signal corresponding to the synchronous reproduction signal to the distribution-side communication terminal 100, both communication terminals can be automatically synchronized. If the PIN code is included in the synchronous reproduction signal or the reception confirmation signal, the step related to authentication can be omitted. Also in this case, it is possible to synchronize with the receiving side communication terminal 200 by setting.

  As described above, according to the embodiment shown in FIG. 5, the receiving communication terminal 200 is synchronized with the distributing communication terminal 200 while reproducing the stored data without synchronizing with the distributing communication terminal 200. When the reproduction signal is received, the synchronous reproduction with the distribution side communication terminal 100 is resumed based on the synchronous reproduction signal, so that the synchronous reproduction with the distribution side communication terminal 100 can be performed after the asynchronous reproduction.

  FIG. 6 shows a distribution area after the reception side communication terminal 200 moves out of the distribution area of the distribution side communication terminal 100 in a state where the distribution side communication terminal 100 and the reception side communication terminal 200 are reproducing contents in synchronization. FIG. 10 is a sequence diagram when a synchronization request signal is received from the receiving-side communication terminal 200 when the process returns to FIG.

  In a situation where the user A and the user B are reproducing contents synchronously according to the sequence shown in FIG. 2, when the receiving communication terminal 200 moves out of the distribution range of the distributing communication terminal 100, the distributing communication terminal 100 Although the reception confirmation signal for the synchronous reproduction signal does not return from the communication terminal 200, the synchronous reproduction signal using short-range wireless communication is not stopped. However, the distribution-side communication terminal 100 reproduces the content asynchronously at the timing of its own terminal because the reception confirmation signal is not obtained. On the other hand, when the receiving communication terminal 200 cannot receive the synchronous reproduction signal from the distribution side communication terminal 100, the reception side communication terminal 200 reproduces the content data transferred from the distribution side communication terminal 100 asynchronously at the timing of the own terminal. In this case, the receiving-side communication terminal 200 also transmits a synchronization request signal to the distribution-side communication terminal 100 at regular intervals without stopping the short-range wireless communication. In this case, power consumption can be reduced by stopping and putting the short-range wireless device of the receiving-side communication terminal 200 in a sleep state other than the synchronization request signal transmission timing.

  When the receiving communication terminal 200 returns to the distribution area of the distribution communication terminal 100 again while both communication terminals are playing the contents asynchronously, the distribution communication terminal 100 sends a synchronization request from the reception communication terminal 200. By receiving the signal and sending a synchronized reproduction signal corresponding to the synchronization request signal to the receiving communication terminal 200, both communication terminals can be automatically synchronized. If the PIN code is included in the synchronous reproduction signal, the reception confirmation signal, or the synchronization request, the step relating to authentication can be omitted. Also in this case, it is possible to synchronize with the receiving side communication terminal 200 by setting.

  As described above, according to the embodiment shown in FIG. 6, the receiving-side communication terminal 200 reproduces the stored data without synchronizing with the distributing-side communication terminal 100. When the synchronization request signal for synchronizing the reproduction of the content data with the own terminal (reception side communication terminal 200) is transmitted, and the distribution side communication terminal 100 receives the synchronization request signal from the reception side communication terminal 200. Since the synchronized reproduction with the receiving communication terminal 200 is resumed in accordance with the synchronization request signal, resynchronization according to the reproduction timing of the receiving communication terminal 200 is possible when both communication terminals are resynchronized.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, each component can be rearranged so as not to be logically contradictory, and a plurality of components can be combined into one or divided.

  Although the present embodiment has been described on the premise of music distribution, it can be seen that the same effect can be obtained if the system is to enjoy moving images and still images continuously (in order).

  Also, if the content being viewed on the communication terminal on the distribution side is random playback, etc., data can be transferred for each song, but it is easier to cancel the random playback and transfer the content data. Viewing is possible. As for synchronized playback, if there is no error in the playback speed at each communication terminal on the delivery side and the reception side, a method of performing synchronization processing only at the beginning of synchronized difference playback and resynchronization for each song A method is conceivable. In the latter case, when the distribution-side communication terminal transfers the unrecorded part of the album-recorded music to the reception-side communication terminal, the estimated time to find each song in the distribution-side communication terminal (which time If it is a method of resynchronizing by embedding (starting playback from the beginning), it is not necessary to send synchronized playback signals frequently. Further, it is conceivable that the key input unit of the communication terminal on the receiving side prohibits key input such as “pause” that disturbs synchronization.

  Further, as a desirable form of the communication terminal, a configuration in which two types of short-distance transmission / reception units are mounted can be considered. First, by performing infrared communication as a method of passing the PIN code for authentication, it can be transmitted as a PIN code stored in the storage unit by bringing the infrared communication between the communication terminals closer to each other. The communication terminal on the distribution side and the communication terminal on the reception side can recognize the other party by bringing the light emitting / receiving section closer. Next, content data is transmitted by using near field communication such as IEEE802.11xx or Bluetooth, eliminating the need to face communication terminals and improving convenience.

  In addition, if a configuration is adopted in which a trial listening is permitted by activating the short-distance transmission / reception unit between songs and authenticating, the receiving communication terminal existing at a short distance is allowed to be auditioned, For the receiving communication terminal that has moved out of the short-range communication range, it is possible to allow the listening only until the end of the currently listened song, and disable the remaining songs stored in the storage unit. . In this case, it is also possible to delete the content data stored in the storage unit of the receiving communication terminal, triggered by the end of the song and the short distance communication with the distributing communication terminal being interrupted.

It is a figure which shows the communication terminal which concerns on one Embodiment of this invention. It is a figure which shows the operation | movement sequence which concerns on one Embodiment of this invention. It is a figure which shows the operation | movement sequence which concerns on one Embodiment of this invention. It is a figure which shows the operation | movement sequence which concerns on one Embodiment of this invention. It is a figure which shows the operation | movement sequence which concerns on one Embodiment of this invention. It is a figure which shows the operation | movement sequence which concerns on one Embodiment of this invention. It is a figure which shows a mode that one user views the content of one communication terminal. It is a figure which shows a mode that two users view the content of one communication terminal. It is a figure which shows a mode that two users view a content in each communication terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission / reception part 2 Short-distance transmission / reception part 3 Key input part 4 Memory | storage part 5 Microphone 6 Display part 7 Speaker 8 Music reproduction part 9 Earphone part 10 Moving image reproduction part 11 Time measurement part 50 Control part 100 Communication terminal

Claims (2)

  1. A storage unit for storing data that can be reproduced and viewed;
    A near field communication unit that communicates with other terminals by near field communication,
    After the short-range wireless communication unit receives all the data to be synchronized and reproduced between the own terminal and the other terminal from the other terminal, and the storage unit stores the received data, the short-range wireless communication unit A control unit that controls to start synchronous reproduction of the stored data with the other terminal based on a synchronous reproduction signal received from the other terminal;
    The control unit further includes:
    When the short-range wireless communication unit is receiving the synchronous reproduction signal, the stored data is controlled to be synchronously reproduced with the other terminal based on the synchronous reproduction signal,
    When the short-range wireless communication unit no longer receives the synchronous reproduction signal, control to continue to reproduce the stored data without synchronizing with the other terminal ,
    The control unit, when the short-range wireless communication unit does not receive the synchronous reproduction signal, when reproducing the data that started the synchronous reproduction without synchronizing with the other terminal, The wireless communication unit controls the other terminal to transmit a synchronization request signal in order to resume synchronous reproduction for the data being reproduced without synchronization.
    Communication terminal.
  2. A near field communication unit that communicates with other terminals by near field communication,
    The short-range wireless communication unit transmits all the data that can be played back and played in the synchronized playback between the own terminal and the other terminal to the other terminal, and after the transmission of the data is finished, the playback of the data in the other terminal A control unit that controls to transmit a synchronized playback signal for synchronizing with the other terminal to the other terminal,
    The control unit further includes:
    When the short-range wireless communication unit has received a reception confirmation signal transmitted from the other terminal, control to reproduce the data synchronously with the other terminal,
    When the short-range wireless communication unit does not receive the reception confirmation signal transmitted from the other terminal, control to continue to play the data without synchronizing with the other terminal ,
    The control unit transmits the synchronous reproduction signal when the short-range wireless communication unit receives the reception confirmation signal transmitted from the other terminal, and transmits the synchronous reproduction signal when the reception confirmation signal is not received. When the transmission of the signal is controlled to stop the transmission of the synchronous reproduction signal, the short-range wireless communication unit synchronizes the reproduction of the data from the other terminal with the other terminal. When receiving a synchronization request signal for controlling, to control to resume the synchronized playback with the other terminal based on the synchronization request signal,
    Communication terminal.
JP2008278898A 2008-10-29 2008-10-29 Communication terminal Active JP5495533B2 (en)

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JP5495533B2 true JP5495533B2 (en) 2014-05-21

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US8267793B2 (en) * 2010-08-17 2012-09-18 Samsung Electronics Co., Ltd. Multiplatform gaming system

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CA2485100C (en) * 2002-05-06 2012-10-09 David Goldberg Localized audio networks and associated digital accessories
GB0222926D0 (en) * 2002-10-03 2002-11-13 Koninkl Philips Electronics Nv Media communications apparatus and method
JP2005151007A (en) * 2003-11-13 2005-06-09 Matsushita Electric Ind Co Ltd Wireless transmission method, and transmitter and receiver used therefor
JP2005229522A (en) * 2004-02-16 2005-08-25 Sony Corp Content sharing system
JP4285444B2 (en) * 2005-05-31 2009-06-24 ソニー株式会社 Reproduction system, reproduction apparatus, reception reproduction apparatus, and reproduction method
US7546118B2 (en) * 2005-10-20 2009-06-09 Sony Ericsson Mobile Communications Ab Coordinated distribution and playback of multimedia programs
US7546144B2 (en) * 2006-05-16 2009-06-09 Sony Ericsson Mobile Communications Ab Mobile wireless communication terminals, systems, methods, and computer program products for managing playback of song files
JP4935345B2 (en) * 2006-12-25 2012-05-23 ソニー株式会社 Content reproduction system, reproduction apparatus, reproduction control method, and program
US20080162668A1 (en) * 2006-12-29 2008-07-03 John David Miller Method and apparatus for mutually-shared media experiences

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