JP2016127370A - Communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system which allows for hearing of voice of relatively high sound quality synchronized with a video without using any special terminal.SOLUTION: A communication system includes a communication terminal having a function for measuring the current time, and capable of wireless communication, and a server for storing the data at least having a video data, a voice data and the reproduction start date for starting reproduction of the video data and voice data, where the video and voice data are divided into a plurality of parts having the reproduction start dates different from each other. The communication terminal requests the server to transmit the reproduction start date and voice data, and performs reproduction control of the voice data on the basis of a comparison result of the current time and the reproduction start date received from the server.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication system.

  2. Description of the Related Art Conventionally, it is known to project a large screen image on an outer wall of a store and to notify a voice to improve customer collection (see, for example, Patent Document 1). In addition, when a movie is shown in a movie theater, it is known to listen to the sound using a receiver that receives the sound of the movie (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2000-322009 Japanese Patent Laid-Open No. 2-15729

  With the technique described in Patent Document 1, a loud sound is notified in order to improve the ability to attract customers. However, the technique of the cited document 1 does not consider the sound quality, and has a problem that the sound quality deteriorates, for example, the sound breaks. In the technique described in Patent Document 2, it is necessary to carry a receiver, which is troublesome.

  According to one aspect of the present invention, there is a communication terminal having a function of measuring the current time and capable of wireless communication, and at least video data, audio data, and reproduction start date and time for starting reproduction of video data and audio data. A server for storing video data and audio data divided into a plurality of parts having different reproduction start dates and times, and the communication terminal requests the server to transmit the reproduction start dates and audio data. Then, the communication terminal performs reproduction control of audio data based on the comparison result between the current time and the reproduction start date / time received from the server.

  The communication terminal receives time information from an external server and corrects the current time.

  The server has a function of measuring the current time, receives time information from the external server, and corrects the current time.

  The server stores the data using the position information as a key.

  The communication terminal transmits a request for data to the server together with its own location information, and the server compares the location information received from the communication terminal with the location information related to the stored data. Based on the comparison result, data is selected and the selected data is transmitted to the communication terminal.

  According to another aspect of the present invention, a communication terminal having a function of measuring the current time and capable of short-range wireless communication, and at least video data, audio data, and reproduction start date / time for starting reproduction of the audio data The video data and the audio data are included in the received data, a server that stores data divided into a plurality of parts having different reproduction start dates and times, a receiving means that receives the data via a network, and the received data A short-distance wireless communication means for receiving the received audio data and transmitting the audio data to the communication terminal in accordance with a short-distance wireless communication standard. When data is displayed, the communication terminal wirelessly communicates with the short-range wireless communication means, receives the audio data corresponding to the video data, and notifies the sound of the audio data That.

An example of composition of communications system 10 is shown roughly. An example of a functional composition of communication terminal 1 is shown roughly. An example of functional composition of server 4 is shown roughly. An example of the composition of a data file is shown roughly. An example of composition of communications system 100 is shown roughly. An example of the communication process in FIG. 5 is shown schematically.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 schematically shows an example of the configuration of the communication system 10. In the present embodiment, the communication system 10 includes a communication terminal 1 and a server 4. The server 4 is an example of a transmission server.

  The communication terminal 1 is a mobile phone possessed by a user (hereinafter sometimes referred to as a user). The communication terminal 1 requests a data file from the server 4 to be described later, and receives the data file from the server 4 as a response to the request. In the present embodiment, for example, the communication terminal 1 receives a data file from the server 4 and reproduces audio data based on data included in the received data file.

  The communication terminal 1 can communicate via the network 3. Here, the network 3 includes mobile phone line networks such as 3G, LTE, and 4G, wireless LAN networks such as WiFi (registered trademark) and WiMAX (registered trademark), and the Internet. Here, it is assumed that the communication terminal 1 can be connected to at least one of a cellular phone line network and a wireless LAN network.

  The server 4 stores video data and audio data in association with each other, and transmits the stored video data and audio data. Specifically, the server 4 transmits the stored video data and audio data to the projection control device 7 at a predetermined timing.

  The projection control device 7 receives the reproduction start date / time, video data, and audio data from the server 4. When the projection control device 7 measures the current time and determines that the playback start date / time included in the received data has arrived, the projection control device 7 outputs the video data included in the received data to the projection unit 5, and outputs the audio data to the speaker. Output to 9. The projection unit 5 is a projector or the like, and projects the video data input from the projection control device 7 onto the screen 6. The screen 6 may be either a transmission type or a reflection type as long as it can be installed both indoors and outdoors. Further, instead of the screen 6, video data may be projected with a wall surface of a building such as a building as a screen. The speaker 9 receives sound data input from the projection control device 7 and rings as sound.

  Thereby, a person in the vicinity of the screen 6 and the speaker 9 can view the image projected on the screen 6 and the sound that the speaker 9 rings.

  By the way, a person who is relatively far from the speaker 9 may have difficulty in hearing the sound from the speaker 9 reliably. In particular, when the speaker 9 is outdoors, it may be difficult to hear the sound due to the influence of ambient noise. Therefore, conventionally, the volume of the speaker 9 is controlled to be large. However, when the volume is increased, there are problems in terms of sound quality, such as the sound being broken. In order to solve this problem, in this embodiment, audio data can be heard by the communication terminal 1.

  That is, in the present embodiment, the communication terminal 1 acquires a data file including audio data from the server 4. In the present embodiment, the data file includes audio data for notifying the user of sound and a reproduction start date and time indicating the time for reproducing the sound. The data file may also include position information.

  When the communication terminal 1 acquires the data file from the server 4, the communication terminal 1 refers to the reproduction start date and time included in the data file, and when the reproduction start date and time arrives, reproduces the audio data included in the data file and generates a sound report unit It sounds more.

  Here, the communication terminal 1 may acquire the data file from the server 4 by periodically communicating with the server 4 according to a predetermined interval in the communication terminal 1.

  At this time, in response to the data file acquisition request from the communication terminal 1, the server 4 acquires the position information of the communication terminal 1, and matches when the acquired position information matches the position information stored in the data file. A data file corresponding to the position information thus transmitted is transmitted to the communication terminal 1. Here, the location information of the communication terminal 1 may be received from the communication terminal 1, or a communication management device that manages communication with the communication terminal 1 (for example, a system on the mobile phone communication network side (the system of the mobile phone communication network is As is widely known, the position of the communication terminal 1 is managed))).

  As described above, the communication terminal 1 refers to the reproduction start date and time included in the data file together with the audio data with respect to the audio data included in the data file acquired from the server 4, and when the reproduction start date and time has arrived. Reproduce. When the communication terminal 1 requests the server 4 to acquire a data file, if it is determined that the data file corresponding to the location information of the communication terminal 1 acquired by the server 4 is not stored, the data is transmitted to the communication terminal 1. Since there is no data file, the server 4 transmits information indicating that there is no data file to be transmitted to the communication terminal 1 to the communication terminal 1. In this case, the communication terminal 1 may display “No audio to play” or the like on the display unit.

  As a result, even when the user is away from the speaker 9 and affected by ambient noise or the like, it is difficult to hear the voice, and by listening to the sound reproduced by the communication terminal 1, the video data reproduced by the server 4 and the speaker 9 can be heard. It is possible to view the same audio data as the sound that is ringing. In this case, it is not necessary for the speaker 9 to ring a sound at a high volume, and the user of the communication terminal 1 can hear a relatively high-quality sound that the communication terminal 1 rings.

  The management device 8 is a device operated by an administrator of the server 4 and sets video data and audio data in the server 4.

  FIG. 2 schematically shows an example of the functional configuration of the communication terminal 1. The communication terminal 1 has a CPU 20, a ROM 21, a RAM 22, a sound report unit 26, a display unit 29, and a short-range communication unit 31, and the CPU 20 functions by executing a program stored in the ROM 21 or the RAM 22. Specifically, the control unit 25, the time information receiving unit 24, the data file receiving unit 27, the position information acquiring unit 28, and the calculating unit 30 are controlled.

  The CPU 20 operates using the information stored in the RAM 22 according to the programs stored in the ROM 21 and the RAM 22 to control each unit. The ROM 21 holds a program executed by the CPU 20. The RAM 22 operates as a work memory for the CPU 20.

  The time information receiving unit 24 receives time information from an external NTP server (not shown). The received time information is stored in the RAM 22 as the current time. The time information receiving unit 24 is controlled by the CPU 20 to periodically receive time information from the NTP server.

  The sound reporting unit 26 converts the sound data input from the control unit 25 into a sound that can be audible to a person and outputs the sound. Specifically, the sound reporting unit 26 includes a D / A converter, a speaker, and the like, and converts the audio data output from the control unit 25 into an analog audio signal and outputs the analog audio signal.

  The control unit 25 transmits and receives various data via the network 3 under the control of the CPU 20. Specifically, the control unit 25 sends data to a destination specified via the network 3 in accordance with an instruction input from the CPU 20.

  The display unit 29 is a display or the like, and displays a telephone number, a name, an address, and the like of a communication partner when the communication terminal 1 functions as a mobile phone. The display unit 29 displays an image received from a web server on the Internet. Further, the display unit 29 displays notification information such as “no audio to be reproduced” in accordance with an instruction input from the control unit 25 when there is no audio data to be transmitted from the server 4 to the communication terminal 1.

  The short-range communication unit 31 wirelessly communicates with an external communication device. Specifically, the short-range communication unit 31 wirelessly communicates with an external communication device according to a communication standard such as buletooth (registered trademark) or iBeacon (trademark). In the present embodiment, the short-range communication unit 31 sends data to the communication device that is the instructed destination in accordance with the instruction input from the control unit 25. The short-range communication unit 31 outputs data received from the communication device wirelessly to the control unit 25.

  The data file receiving unit 27 receives a data file from the server 4 via the control unit 25. The data file receiving unit 27 stores the data file received from the server 4 in the RAM 22.

  The position information acquisition unit 28 acquires position information of the communication terminal 1. In an example of the present embodiment, the control unit 25 has a communication function with a mobile phone line network, and is based on communication with a base station (hereinafter simply referred to as “base station”) on a mobile phone line network (not shown). Get location information. In this case, the position information acquisition unit 28 receives positioning information from a plurality of base stations installed around the communication terminal 1, and acquires the position information of the communication terminal 1 by calculation based on the received plurality of positioning information. . Then, the position information acquisition unit 28 stores the acquired position information in the RAM 22. The position information acquisition method by the position information acquisition unit 28 is not only a method of calculating from positioning information from surrounding base stations, but also a method of acquiring using GPS, an acceleration sensor, a gyro, etc. There is a specific calculation method, and any method may be used in this embodiment.

  The calculation unit 30 compares the position information included in the data file stored in the RAM 22 with the position information acquired by the position information acquisition unit 28. Then, the result of the comparison is obtained and output to the control unit 25. The arithmetic unit 30 compares the current time measured by the time information receiving unit 24 with the reproduction start date and time included in the data file stored in the RAM 22 and outputs the comparison result to the control unit 25. To do.

  The control unit 25 performs reproduction control of the audio data of the data file stored in the RAM 22 based on the comparison result output from the calculation unit 30. A specific audio data reproduction control method by the control unit 25 will be described in detail later.

  An example of the functional configuration of the server 4 is schematically shown in FIG. The server 4 is realized by a general server device including a CPU, a memory, a disk system, a communication means, and the like. Functionally, the request accepting unit 41, the projection data acquiring unit 42, the managing unit 43, and a data file transmitting unit 44, a time data acquisition unit 45, and a video data / audio data output unit 47.

  The request accepting unit 41 accepts a data file request from the communication terminal 1 and outputs it to the management unit 43. The data file request from the communication terminal 1 may include information on the current position of the communication terminal 1.

  The projection data acquisition unit 42 receives video data, audio data, peripheral position information when projecting video data, and a reproduction start date and time indicating the timing of reproducing video data and audio data from the management device 8. To the management unit 43.

  The management unit 43 associates the video data input from the projection data acquisition unit 42, the audio data, the peripheral position information when projecting the video data, and the reproduction start date and time for reproducing the video data and the audio data into the disk system. Store. Specifically, as illustrated in FIG. 4, video data, audio data, reproduction start date / time, and the like are stored using position information as a key.

  In the example of FIG. 4, content such as video data to be projected (contents (1), (2)...) Is divided into a plurality of parts (parts every 10 seconds in the example of FIG. 4). ing. In addition, the video data and the like of each part includes reproduction start dates and times 53, 58, video data 54, 59, and audio data 55, 60, and so on for the part identification numbers 52, 57, respectively. It is related. Further, the entire data for each content divided into these parts is set with one piece of position information 51, 56,... Having a preset regional range (set in the range of latitude and longitude in the example of FIG. 4) as a key. To be recorded.

  The division into these parts, the setting of the reproduction start date and time, the setting of the regional range, and the like are determined in consideration of the contents of the projected video by the manager who manages the projection of the video data, and the management device 8 Shall be input by operating.

  The time data acquisition unit 45 acquires time information from an NTP server (not shown), and outputs the acquired time information to the management unit 43. The time information acquisition timing from the NTP server of the time data acquisition unit 45 is set at a preset timing, for example, every 12 hours.

  The management unit 43 keeps time, and when the time data acquisition unit 45 outputs time information, the time keeping time is corrected and set based on the time information. Further, it is assumed that the management unit 43 holds settings (information such as a network address) for specifying the projection control device 7 that is a transmission destination of video data and audio data for each content. This setting is also made by the administrator.

  The management unit 43 refers to the playback start date and time included in each data file stored in the server 4 and matches the current time being measured (here, the match with the current time is, for example, before the current time). Thus, the difference between the current time and the current time is within a predetermined range is searched. When the management unit 43 finds one that matches the current time counted here, the management unit 43 converts the playback start date and time, video data, and audio data of the part including the found playback start date and time to the video data / audio data. Output to the output unit 47. At this time, the management unit 43 also outputs to the video data / audio data output unit 47 the information specifying the projection control device 7 that is preset as the content transmission destination including the found reproduction start date and time.

  Further, the management unit 43 extracts at least one set of the reproduction start date and time and the audio data from the data stored in the server 4 at a predetermined timing, and at least the set of the extracted reproduction start date and time and the audio data. One data file is generated, and the data file is output to the data file transmission unit 44. Here, the predetermined timing is, for example, when a request for audio data is received from the communication terminal 1.

  The data file transmission unit 44 transmits the data file received from the management unit 43 to the communication terminal 1.

  The video data / audio data output unit 47 transmits the reproduction start date and time, video data, and audio data input from the management unit 43 to the projection control device 7.

  Hereinafter, the operation of this embodiment will be described. In the following description, it is assumed that the server 4 stores and stores video data, audio data, and reproduction start date and time as shown in FIG. 4 in association with position information.

  Specifically, as illustrated in FIG. 4, the position information 51 of the content (1) is “North latitude: 35 ° 53′43 ″ to 35 ° 54′3 ″, East longitude: 140 ° 3′47 ″. ˜140 ° 3′44 ″ ”. Further, it is assumed that the video data 54 and the audio data 55 relating to the content (1) are divided into a plurality of parts, and the reproduction start date and time 53 of the video data and audio data of each part is set. For example, the playback start date and time for the first part is set to “2014.09.01 14:00:00”.

  For the content (2), the position information 56 is set to "north latitude: 35 ° 54'5" to 35 ° 53'59 ", east longitude: 140 ° 3'17" to 140 ° 3'13 ". Yes. Also for content (2), video data 59 and audio data 60 are divided into a plurality of parts, and reproduction start dates and times 58 for the video data and audio data of each part are set. For example, the reproduction start date and time of the first part of the content (2) is set to “2014.10.01 14: 00: 0”.

  In this way, the server 4 sets and stores video data and audio data related to the content using the position information as a key. The server 4 accepts a data file transmission request from the communication terminal 1 and acquires position information of the communication terminal 1 that has made the request. Here, the server 4 may receive the position information of the communication terminal 1 from the communication terminal 1 together with the above request, or may obtain the position information of the communication terminal 1 using the information of the mobile phone line network.

  The server 4 compares the acquired location information of the communication terminal 1 with the location information associated with each content stored in the server 4. Then, the content associated with the position information that matches the position information of the communication terminal 1 is searched. Here, the position information match means that the position information of the communication terminal 1 is included in the range indicated by the position information associated with the content.

  When the server 4 finds the content associated with the position information that matches the position information of the communication terminal 1, the server 4 extracts the reproduction start date and time and the audio data from the data of each part included in the found content. And a data file including at least one pair of reproduction start date and time and audio data associated with each other is generated and sent to the communication terminal 1.

  At this time, the server 4 selects a combination of the reproduction start date and time and the audio data in the part including the reproduction start date and time later than the current time, generates a data file including the selected set, and performs communication. It may be sent to the terminal 1.

  The server 4 keeps the current time based on time data acquired from an NTP server or the like. The server 4 refers to the reproduction start date and time of the first part of the content stored in the server 4 and searches for the reproduction start date and time that matches the current time that is being timed (matching with the current time here) Is, for example, before the current time and having a difference from the current time within a predetermined range).

  When there is a reproduction start date and time found by the search (a reproduction start date and time that matches the current time that is being timed), the server 4 determines the first part for the content that includes the reproduction start date and time in the first part. The playback start date and time included in the video data and the video data and audio data included in each part are transmitted to the projection control device 7.

  The projection control device 7 receives the reproduction start date and time of the first part, and the video data and audio data included in each part. Further, the projection control device 7 compares the reception start date and time of the first part received while measuring the current time, and determines that the playback start date and time of the first part has arrived, the video data and audio data of the first part. In order, the video data of each part is sequentially output to the projection unit 5, and the audio data of each part is output to the speaker 9. The projection unit 5 projects the input video data onto the screen 6, and the speaker 9 converts the input audio data into sound and rings.

  Thus, the video data and audio data set and stored in the server 4 are reproduced when the associated reproduction start date and time are reached, the video data is projected onto the screen 6, and the audio data is notified from the speaker 9. The Therefore, people around the screen 6 and the speaker 9 can view the video and audio.

  Here, the user of the communication terminal 1 may be unable to hear the sound of the speaker 9 such as when the place where the user is is away from the speaker 9 or when it is difficult to hear the sound due to the influence of ambient noise. In some cases, or when it is desired to obtain audio data with relatively good sound quality, the user of the communication terminal 1 operates the communication terminal 1 and requests the server 4 to transmit a data file.

  This transmission request is transmitted to the server 4 via the network 3. At this time, the transmission request may include the position information of the communication terminal 1 for transmission. This transmission request is received by the server 4, and the server 4 acquires the position information of the communication terminal 1 that is the reception source of the request. Then, the server 4 compares the position information of the communication terminal 1 with the position information set and stored in the data file, and the position information of the communication terminal 1 corresponds to the range of the position information set and stored in the data file. Select content.

  The management unit 43 extracts a set of playback start date / time and audio data of each part from the selected content, and sends a data file including the set of playback start date / time and audio data of each part to the requesting communication terminal 1. Send to.

  The communication terminal 1 receives the data file, compares the reproduction start date and time of each part included in the data file with the current time, and is in time for the reproduction start date (the current time is before the reproduction start date and And the playback start date and time are within a predetermined range, and when the playback start date and time arrives, the decoded audio data is played and the sound is sounded. As a result, the user of the communication terminal 1 can hear the sound synchronized with the video projected on the screen 6 from the sound report unit 26 of the communication terminal 1.

  Specifically, in the content (1) of FIG. 4, when the communication terminal 1 is within the range of the position information 51, “2014.09.01 14:00:00”, which is the reproduction start date and time of the first part, is the current time. When it arrives, the audio data “WWWWW” of the corresponding part is reproduced.

  Note that, depending on the reception timing of the audio data, the current time has passed “2014.09.01 14:00:00” which is the playback start date and time of the first part, and the playback start date and time of the second part “2014.09.01 14 : 00: 00: ”, when the second part playback start date“ 2014.09.01 14:00:10 ”arrives, the second part of the audio data“ XXXXX ” Playback starts from “2014.09.01 14:00:10”.

  In this way, the communication terminal 1 compares the reproduction start date and time included in the data file with the current time, and reproduces the audio data of the part whose reproduction start date and time has arrived.

  As already described, the division of video data and audio data into each part may be performed by an administrator, or as data for each division interval (for example, 10 seconds) set in advance in the server 4. The division may be performed by the server 4 without performing an artificial operation. This division interval is set in consideration of the congestion status of the wireless network and the movement of the user of the communication terminal 1 in order to transmit voice data to the communication terminal 1.

  In another example of the present embodiment, voice data may be transmitted to the communication terminal 1 by short-range wireless communication. This embodiment of the present invention will be described with reference to FIG. In the above description, the video data is projected onto the screen 6. However, the present embodiment is not limited to this and may be displayed on a display or the like.

  FIG. 5 schematically shows an example of the configuration of the communication system 100 according to the present embodiment. In FIG. 5, components having the same functional configuration are denoted by the same reference numerals, and repeated description thereof is omitted.

  The data file receiving unit 73 receives content data (reproduction start date and time of the first part, video data and audio data included in each part) from the server 4 via the network 3. In this example of the present embodiment, the content data may be the same as that shown in FIG. 4, but the server 4 does not need to confirm the location information of the communication terminal 1, so the location information is used as a key. It is not always necessary to store the video data, audio data, and reproduction start date / time on the server 4 side without using the position information.

  The data file receiving unit 73 measures the current time, and determines whether or not the reproduction start date / time (the reproduction start date / time of the first part) included in the received data has arrived. If it is determined that the reproduction start date / time has arrived, the data file receiving unit 73 outputs video data included in the received data to the video data display unit 72 and outputs audio data to the audio data output unit 71. .

  The video data display unit 72 displays the received video data as information that can be seen by a person. Specifically, the video data display unit 72 may include a projector and a screen, or may be a display device or the like, as in the example described above.

  The audio data output unit 71 outputs the input audio data to the short-range wireless communication unit 76. The audio data output unit 71 may include a speaker and sound audio data input through the speaker.

  The short-range wireless communication unit 76 transmits the received voice data to the communication terminal 1 according to a communication standard such as bluetooth or iBeacon. As a result, the communication terminal 1 can receive the voice data from the short-range wireless communication unit 76 and ring the voice related to the voice data from the sound reporting unit of the communication terminal 1.

  This example of the present embodiment can be used for applications such as listening to audio using the communication terminal 1 while watching a video displayed on a display provided in a vehicle, for example, on a train. In this case, the data file receiving unit 73, the video data display unit 72, the audio data output unit 71, and the short-range wireless communication unit 76 are installed on the vehicle side, and the server 4 is installed in the network system of the communication carrier.

  Specifically, as illustrated in FIG. When a user who owns the communication terminal 1 wants to hear a sound by watching a video displayed on the video data display unit 72 on a train, the user operates the communication terminal 1 to connect the communication terminal 1 and the short-range wireless communication unit. 76 is set to a state in which communication with 76 is possible. The short-range wireless communication of the present embodiment may use a communication standard such as bluetooth or iBeacon, and the setting method is widely known, so detailed description thereof will be omitted.

  When the communication terminal 1 and the short-range wireless communication unit 76 are communicable, the short-range wireless communication unit 76 requests the voice data output unit 71 to output voice data. The voice data output unit 71 outputs voice data to the short-range wireless communication unit 76 in response to this request. The short-range wireless communication unit 76 transmits the received audio data to the communication terminal 1 in accordance with a communication standard such as bluetooth or iBeacon. The communication terminal 1 receives the voice data from the short-range wireless communication unit 76 and notifies the voice from the sound report unit. By listening to the audio, the user of the communication terminal 1 can view the video displayed on the video data display unit and the audio synchronized therewith.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

1,10,100 communication system, 3 network, 4 server, 5 projection unit, 6 screen, 7 projection control device, 8 management device, 9 speaker, 20 CPU, 21 ROM, 22 RAM, 24 time information receiving unit, 25 control 26, sound report unit, 27 data file reception unit, 28 position information acquisition unit, 29 display unit, 30 calculation unit, 42 projection data acquisition unit, 43 management unit, 44 data file transmission unit, 45 time data acquisition unit, 47 Video data / audio data output unit, 71 audio data receiving unit, 72 video data display unit, 73 data receiving unit, 76 near field communication unit.

Claims (6)

A communication terminal that has the function of measuring the current time and is capable of wireless communication;
A server for storing at least video data, audio data, and a reproduction start date and time for starting reproduction of video data and audio data, wherein the video data and audio data are divided into a plurality of parts having different reproduction start dates and times ,
With
The communication terminal requests the server to transmit a reproduction start date and time and audio data, and the communication terminal performs audio data reproduction control based on a comparison result between the current time and the reproduction start date and time received from the server. Communication system to perform.   The communication system according to claim 1, wherein the communication terminal receives time information from an external time information server and corrects the current time.   The communication system according to claim 1, wherein the server has a function of measuring a current time, and receives time information from an external time information server to correct the current time.   The communication system according to claim 1, wherein the server stores the data using position information as a key.   The communication terminal transmits a request for data to the server together with its own position information, and the server compares the position information received from the communication terminal with the position information related to the stored data, and compares The communication system according to claim 1, wherein data is selected based on the result, and the selected data is transmitted to the communication terminal. A communication terminal that has the function of measuring the current time and is capable of short-range wireless communication;
A server that stores at least video data, audio data, and a reproduction start date and time for starting reproduction of the audio data, the video data and audio data being divided into a plurality of parts having different reproduction start dates and times;
Receiving means for receiving the data via a network;
A display unit for displaying video data included in the received data;
Short-range wireless communication means for accepting the received voice data and transmitting the voice data to the communication terminal in accordance with a short-range wireless communication standard;
A communication system comprising:

Images