JP2008124991A - Communication apparatus, and voice communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable only a predetermined person to participate in a voice conference. <P>SOLUTION: A multi-point connection device 10 sets up a communication session with a prescribed communication terminal 20 on a date stored beforehand. The multi-point connection device 10 requests authentication information to the communication terminal with which the communication session has been set up. When the authentication information is input by a scheduled conference participant in the communication terminal 20, the communication terminal 20 transmits the input authentication information to the multi-point connection device 10. In a case where the transmitted authentication information is matched to the stored authentication information, the multi-point connection device 10 exchanges voices with the communication terminal 20 and sends the voice transmitted from the communication terminal 20 and received to a communication terminal different from the communication terminal that transmitted the voice. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technology for performing an audio conference between a plurality of points.

  2. Description of the Related Art A system that conducts a conference between remote locations using a plurality of communication terminals connected to a communication network has become widespread. In such a conference system, when an image can be distributed together with sound, the conference participant can be photographed with a camera and the conference participant's image can be distributed to each terminal. It is possible to easily confirm unauthorized participation in a conference other than the conference participants, and to prevent information leakage. However, in the case of a system that distributes only audio without distributing images, the face of the conference participant cannot be confirmed, so whether the specified conference participant is participating in the conference, It is not easy to confirm by voice only whether something not called is participating in the conference. In particular, if the person in front of the terminal does not speak, even the voice cannot be confirmed, so whether the designated conference participant is listening to the voice, or the person unrelated to the meeting is listening to the voice. It is difficult to judge whether

  Therefore, systems disclosed in Patent Documents 1 to 3 have been devised as a system for preventing anyone other than a predetermined person from participating in the conference. In these systems, in order to participate in the conference using the terminal, it is possible to transmit the authentication information from the terminal and perform the conference using the terminal only when authenticated on the receiving side of the authentication information. It has become.

Japanese Patent Laid-Open No. 11-146372 JP 2001-66979 A JP 2001-224000 A

  In the systems disclosed in Patent Documents 1 to 3, a connection request to the conference system is actively made from the terminal side. When the authentication information is transmitted from the terminal and the device that receives the authentication information stores the same information as the authentication information, the terminal that has transmitted the authentication information can perform a voice conference. However, when a connection request is made from the conference system side to the terminal side, and the terminal responds passively, there is no means for actively sending authentication information from the terminal, and the terminal has internal authentication information set in advance. In a system that automatically responds based on this, a person who is not originally requested to participate can eavesdrop on the conversation.

  The present invention has been made under the above-described background, and an object thereof is to provide a technique in which only a predetermined person can participate in an audio conference.

  In order to solve the above-described problems, the present invention provides clock means for measuring the date, start date and time of the conference, authentication information of the prospective participant of the conference, and a communication address of the communication terminal used by the prospective participant. When the storage means for storing and the date and time measured by the clock means match the start date and time stored in the storage means, the communication of the communication address stored in association with the start date and time Transmitting means for transmitting a message requesting authentication information to the terminal; receiving means for receiving authentication information transmitted from the communication terminal that has received the message; authentication information received by the receiving means; and the message Determining means for determining whether or not the authentication information stored in the storage means in correspondence with the communication address of the communication terminal that is the transmission destination of If it is determined that the authentication information matches, the communication terminal that has transmitted the authentication information, the voice communication means that transmits and receives voice data, and the voice data received by the voice communication means A communication device having voice data distribution means for transmitting by the voice communication means to a communication terminal different from the communication terminal that transmitted the message.

  In this communication terminal, while the voice data is being transmitted and received between the communication terminal and the communication device, the communication terminal transmits the communication data to the communication terminal stored in the storage unit. The message may be transmitted according to the information that has been sent.

  The present invention also stores a clock means for measuring the date and time, a conference start date and time, authentication information of a prospective participant of the conference, and a communication address of a communication terminal used by the prospective participant in association with each other. And the date and time measured by the clock means and the start date and time stored in the storage means match the authentication information for the communication terminal of the communication address stored in association with the start date and time A message transmitting means for transmitting a message requesting authentication, an authentication information receiving means for receiving authentication information transmitted from a communication terminal that has received the message, an authentication information received by the authentication information receiving means, and Determining means for determining whether or not the authentication information stored in the storage means in association with the communication address of the communication terminal that is the transmission destination matches; If the authentication information is determined to match, the communication terminal that has transmitted the authentication information, the audio communication means that transmits and receives the audio data, and the audio data received by the audio communication means A communication device having a voice data distribution means for transmitting by means of the voice communication means to a communication terminal different from the communication terminal that transmitted the voice, voice data generation means for collecting voice and generating voice data representing the voice, Message receiving means for receiving a message transmitted from the transmitting means, authentication information receiving means for receiving authentication information from a user, and authentication information transmission for transmitting authentication information received by the authentication information receiving means to the communication device And voice data generated by the voice data generation means is transmitted to the communication device and transmitted from the communication device. Provides a voice communication means for receiving the voice data, the voice communication system and a communication terminal having an audio output means for outputting a voice represented by the voice data received by the voice communication means.

  According to the present invention, only a predetermined person can participate in the audio conference.

[Configuration of the embodiment]
(overall structure)
First, the configuration of the audio conference system 1 according to an embodiment of the present invention will be described. FIG. 1 is a diagram schematically showing the overall configuration of the audio conference system 1. As shown in FIG. 1, the audio conference system 1 includes a plurality of communication terminals 20 </ b> A to 20 </ b> D connected to a communication network 30 such as a LAN (Local Area Network) or the Internet, and a multipoint connection device 10. Yes. The audio conference system 1 collects the sound of the conference room in which the communication terminal is arranged, and outputs the collected sound to the conference room in which another communication terminal is arranged via the multipoint connection device 10. This is a voice communication system that enables a conference between conference rooms. In FIG. 1, four communication terminals 20 </ b> A to 20 </ b> D are illustrated, but in the present embodiment, a conference can be performed by connecting five or more communication terminals to the communication network 30.

(Configuration of communication terminal)
The communication terminals 20 </ b> A to 20 </ b> D are respectively installed in the conference rooms A to D that are separated from each other, and are connected to the communication network 30. In addition, since communication terminal 20A-20D is the respectively same structure, in the following description, a structure is demonstrated only about communication terminal 20A, The description is abbreviate | omitted about communication terminals 20B-20D. In addition, since the communication terminals 20A to 20D have the same configuration, hereinafter, the communication terminals 20A to 20D will be referred to as communication terminals 20 when it is not necessary to distinguish the communication terminals.

  FIG. 2 is a block diagram illustrating a hardware configuration of the communication terminal 20. The microphone 232 collects sound around the communication terminal 20 and outputs an audio signal representing the collected sound to the AD converter 231. The AD (Analog / Digital) converter 231 digitizes an analog signal. When the audio signal output from the microphone 232 is received, the AD (Analog / Digital) converter 231 digitizes the received audio signal and represents the sound collected by the microphone 232. Generate audio data. Then, the generated audio data is output to the communication interface 210.

The communication interface 210 is connected to the communication network 30 and functions as an interface for the communication terminal 20 to perform communication via the communication network 30 by exchanging various messages and data via the communication network 30.
The DA (Digital / Analog) converter 221 converts digitized data into an analog signal. Upon receiving data sent from the communication interface 210, the DA (Digital / Analog) converter 221 generates and generates an audio signal represented by the received data. The audio signal is output to the speaker 222.
The sound source unit 250 generates an audio signal and outputs it to the speaker 222, generates an audio signal representing a ringing sound, and outputs the audio signal to the speaker 222.
The speaker 222 emits sound represented by the supplied audio signal.

  The terminal operation unit 242 includes a numeric keypad, up and down cursor keys for performing various settings, left and right cursor keys, a determination key and a cancel key, a connection key used when connecting to another communication terminal 20, and another communication terminal 20. Various keys for operating the communication terminal 20 such as a disconnect key and a volume adjustment key used when disconnecting from the communication terminal 20 are provided. When the key is operated, the terminal operation unit 242 outputs a signal representing the operated key to the terminal control unit 241. Further, the terminal operation unit 242 has a liquid crystal display. This liquid crystal display displays various settings for the communication terminal 20, various menus for operating the communication terminal 20, various messages, and the like under the control of the terminal control unit 241.

  The terminal control unit 241 includes a CPU (Central Processing Unit) 241A, a ROM (Read Only Memory) 241B, a RAM (Random Access Memory) 241C, and a nonvolatile memory 241D. The ROM 241B stores a control program that causes the communication terminal 20 to realize various functions. The non-volatile memory 241D stores a SIP (Session Initiation Protocol) address assigned to the communication terminal 20. For example, in the communication terminal 20A, "20A@server1.net", and in the communication terminal 20B, The communication terminal 20D stores a SIP address that uniquely identifies the communication terminal, such as “20D@server1.net”. When the control program is executed by the CPU 241A in the terminal control unit 241, the communication interface 210 is controlled by the terminal control unit 241, and the communication terminal 20 has a function of communicating with other devices in accordance with SIP or via the communication network 30. The function to exchange various messages and data with other devices is realized.

(Configuration of multipoint connection device)
Next, the configuration of the multipoint connection device 10 will be described. FIG. 3 is a block diagram illustrating a hardware configuration of the multipoint connection apparatus 10. The communication interface 110 is connected to the communication network 30, exchanges various messages and data via the communication network 30, and functions as an interface for the multipoint connection apparatus 10 to perform communication via the communication network 30.

  The control unit 140 includes a CPU 140A, a ROM 140B, a RAM 140C, and a storage unit 140D. The ROM 140B stores a control program, and the storage unit 140D is given to the start date and time of the conference performed using the audio conference system 1, the SIP address of the communication terminal 20 used for the conference, and the conference participants. A conference schedule table TB1 that stores passwords (authentication information) in association with each other is stored. As shown in FIG. 4, the conference schedule table TB1 includes a start date / time field storing the scheduled start date / time of the conference and a communication storing the SIP address of the communication terminal 20 used for the conference started at the scheduled start date / time. A terminal field; and a password field that stores a password assigned in advance to a prospective participant of a conference that starts at the date and time stored in the start date and time field. In addition, the storage unit 140D stores the SIP address assigned to the multipoint connection device 10 and guidance data representing guidance voice that prompts the user to input a password. When the control program is executed by the CPU 140 </ b> A in the control unit 140, the communication interface 110 is controlled by the control unit 140. In the multipoint connection device 10, a function for communicating with other devices in accordance with SIP or the communication network 30 The function to exchange various messages and data with other devices is realized. Further, when the control program is executed in the control unit 140, a function for measuring the date and time is realized, and when the scheduled start date and time of the conference stored in the conference schedule table TB1 is reached, a session with the predetermined communication terminal 20 is established. Thus, a communication function is realized.

[Operation of the embodiment]
Next, the operation of this embodiment will be described. First, the multipoint connection device 10 that measures the date and time determines whether or not the date and time that is measured match the start date and time stored in the conference schedule table TB1. When the date and time being measured match the start date and time stored in the conference schedule table TB1, the multipoint connection device 10 then stores the SIP address and password field stored in the SIP address field. Read the password. Specifically, when the conference schedule table TB1 shown in FIG. 4 is stored in the storage unit 140D, first, the multipoint connection device 10 has the SIP address “20A@server1.net” and the password “2001”. Is read. Then, the multipoint connection apparatus 10 sends an INVITE message whose method name is “INVITE” to start a session with the communication terminal 20A that is the communication terminal identified by the read SIP address “20A@server1.net”. The communication interface 110 is controlled and sent to the communication network 30 (FIG. 5: step S1).

  This INVITE message is received by the communication terminal 20A to which the SIP address “20A@server1.net” is assigned. When the INVITE message is received by the communication interface 210 of the communication terminal 20A, a Trying response is first generated in the communication terminal 20A. The generated response is sent to the multipoint connection apparatus 10 via the communication network 30 and received by the multipoint connection apparatus 10 (step S2). In communication terminal 20A, after a Trying response is generated, a Ringing response is generated. This generated response is sent to the multipoint connection apparatus 10 via the communication network 30, and is received by the multipoint connection apparatus 10 (step S3).

  In the communication terminal 20A that has transmitted the Ringing response, the sound source unit 250 is controlled under the control of the terminal control unit 241, and an audio signal representing the ringing sound is output to the speaker 222, and the ringing sound is output from the speaker 222. Is done. When a person who hears this ringing sound presses the connection key of the terminal operation unit 242, an OK response is generated in the communication terminal 20A, and the generated response is sent to the communication network 30. This response is received by the multipoint connection apparatus 10 (step S4).

  When receiving the OK response, the multipoint connection apparatus 10 transmits an ACK message whose method name is “ACK” to the communication terminal 20A (step S5). When this ACK message is received by communication terminal 20A, a session is established between communication terminal 20A and multipoint connection apparatus 10 (step S6), and multipoint connection apparatus 10 and communication terminal 20A communicate. Is possible. At this point, only a session is established, and voice communication is not possible.

  When the session is established with the communication terminal 20A, the multipoint connection apparatus 10 generates a SUBSCRIBE message with the method name “SUBSCRIBE” and transmits the generated message to the communication terminal 20A (step S7). Then, after transmitting the SUBSCRIBE message, the multipoint connection apparatus 10 transmits the guidance data stored in the storage unit 140D to the communication terminal 20A (step S8).

  When the communication terminal 20A receives the SUBSCRIBE message after the session with the multipoint connection device 10 is established, the communication terminal 20A waits for the guidance data to be transmitted. Then, when receiving the guidance data, the communication terminal 20A supplies this guidance data to the DA converter 221. In the DA converter 221, an audio signal represented by the guidance data is generated from the supplied guidance data, and the generated audio signal is output to the speaker 222. When this audio signal is input to the speaker 222, a message “Please enter a password” is output from the speaker 222.

  A person who hears this message operates the numeric keypad of the terminal operation unit 242 to input a password. Here, the person who operates the terminal operation unit 242 is a person who is scheduled to participate in a meeting that starts on the date and time stored in the meeting schedule table TB1 and has been given a password “2001” in advance. The password “2001” is input and the enter key is pressed. In the communication terminal 20A, when the enter key is pressed after the password is input, a NOTIFY message including the input password and having the method name “NOTIFY” is generated, and the generated message is connected to the multipoint. It is transmitted to the device 10 (step S9).

  When receiving this message, the multipoint connection apparatus 10 determines whether or not the password included in the received message is the same as the password read together with the SIP address from the conference schedule table TB1. Here, the password included in the message is “2001”, and the password read from the conference schedule table TB1 together with the SIP address “20A@server1.net” is the same as “2001”. Determines that the passwords are the same and maintains an established session. Here, when an established session is maintained, voice communication is possible.

Next, the multipoint connection device 10 reads the SIP address “20B@server1.net” and the password “2002” from the conference schedule table TB1, and establishes a session with the communication terminal 20A in the same manner as when establishing a session with the communication terminal 20B. Sessions are established between them (step S10).
The operation from when the INVITE message is transmitted until the session is established between the communication terminal 20B and the multipoint connection device 10 is the same as that when the session is established with the communication terminal 20A. The illustration of the steps during this period is omitted. When a session is established between the multipoint connection apparatus 10 and the communication terminal 20B, a SUBSCRIBE message and guidance data are transmitted to the communication terminal 20B (steps S11 and S12), and a message prompting the input of a password is displayed in the communication terminal 20B. Are output from the speaker 222. If the person who operates the communication terminal 20B is a person who is scheduled to participate in a meeting that starts at the date and time stored in the meeting schedule table TB1 and has been given a password “2002” in advance, the communication terminal 20B The password “2002” is input to “NO”, and a NOTIFY message including the input password is transmitted from the communication terminal 20B to the multipoint connection apparatus 10 (step S13).

  The multipoint connection apparatus 10 receives this message, and determines whether or not the password “2002” included in the received message is the same as the password “2002” read from the conference schedule table TB1 together with the SIP address. to decide. Here, since the passwords are the same, the multipoint connection apparatus 10 determines that the passwords are the same, and the established session is maintained.

  Thereafter, the multipoint connection device 10 reads out the SIP address “20C@server1.net” and the password “2003” to establish a session with the communication terminal 20C (step S14), and a NOTIFY message including the password “2003”. Is received from the communication terminal 20C (step S15), the established session is maintained with the communication terminal 20C. The operation from when the INVITE message is transmitted between the multipoint connection apparatus 10 and the communication terminal 20C until the session is established between the communication terminal 20C and the multipoint connection apparatus 10, the SUBSCRIBE message, and the guidance Since the operation of transmitting data is the same as that when communicating with the communication terminal 20A, the illustration of the steps in the meantime is omitted in FIG.

After establishing the session with the communication terminal 20C, the multipoint connection device 10 reads the SIP address “20D@server1.net” and the password “2004” from the conference schedule table TB1. Then, the session is established with the communication terminal 20D in the same manner as when the session is established with the communication terminal 20A (step S16).
In this case as well, the operation from when the INVITE message is transmitted until the session is established between the communication terminal 20D and the multipoint connection apparatus 10 is the same as that when communicating with the communication terminal 20A. The illustration of the steps during this time is omitted.
When a session is established between the multipoint connection device 10 and the communication terminal 20D, a SUBSCRIBE message and guidance data are transmitted to the communication terminal 20D (steps S17 and S18), and a message prompting the input of a password is transmitted. Output from the speaker 222 of the terminal 20D. When a message prompting the input of the password is output from the speaker 222, the communication terminal 20D waits for the password to be input.

  A person who operates the communication terminal 20D operates the terminal operation unit 242 to input a password. Here, when the person who operates communication terminal 20D is not a prospective participant of the meeting started at the date and time stored in conference schedule table TB1 (that is, when the person is not a valid participant of the meeting), communication terminal 20D. Since the person who operates is not aware of the password given to the prospective participant of the conference, a password different from the password “2004” is input. When the operator of the communication terminal 20D presses the enter key of the terminal operation unit 242, the communication terminal 20D generates a NOTIFY message including the input password, and the generated message is used as the multipoint connection device 10. (Step S19).

  When this message is received by the multipoint connection device 10, the multipoint connection device 10 confirms that the password included in the received message is the same as the password read from the conference schedule table TB1 together with the SIP address. Judge whether or not. Here, the password included in the message is other than “2004”, and the password read from the conference schedule table TB1 together with the SIP address “20D@server1.net” is different from “2004”. If the passwords are different, the multipoint connection device 10 generates a BYE message whose method name is “BYE”, and transmits the generated message to the communication terminal 20D (step S20).

  When this message is received by communication terminal 20D, communication terminal 20D generates an OK response and transmits the generated response to multipoint connection apparatus 10 (step S21). When this response is received by the multipoint connection apparatus 10, the session between the multipoint connection apparatus 10 and the communication terminal 20B ends.

  Thereafter, in a state where a session is maintained between the multipoint connection apparatus 10 and the communication terminals 20A to 20C, when the operator of the communication terminal 20A makes a sound, the sound is picked up by the microphone 232. . The sound collected by the microphone 232 is converted into an audio signal, and the audio signal is supplied to the AD converter 231. The AD converter 231 converts the input audio signal into audio data and supplies the audio data to the communication interface 210. When the voice data is supplied, the communication interface 210 transmits the voice data to the multipoint connection device 10 (step S22).

  When the multipoint connection apparatus 10 receives the audio data transmitted from the communication terminal 20A, the multipoint connection apparatus 10 transmits the received audio data to the communication terminals 20B and 20C in which the session is established (steps S23 and S24). When the voice data transmitted from the multipoint connection apparatus 10 is received by the communication interface 210 of the communication terminal 20B, the received voice data is supplied to the DA converter 221. The DA converter 221 generates an audio signal from the supplied audio data, and supplies the generated audio signal to the speaker 222. When an audio signal is supplied to the speaker 222, the speaker 222 outputs a voice uttered by the operator of the communication terminal 20A, and the operator of the communication terminal 20B can hear the voice of the operator of the communication terminal 20A. . Similarly, in the communication terminal 20 </ b> C to which the audio data is transmitted from the multipoint connection device 10, an audio signal is generated from the received audio data, and the audio generated by the operator of the communication terminal 20 </ b> A is output from the speaker 222. Thereby, the operator of the communication terminal 20C can hear the voice of the operator of the communication terminal 20A. In addition, since the session is not established between the multipoint connection device 10 and the communication terminal 20D, the voice data is not sent to the communication terminal 20D, and the person who operated the communication terminal 20D (the right to participate in the conference) A person who is not a person cannot hear the voice of the operator of the communication terminal 20A.

  Further, when the operator of the communication terminal 20B utters voice in response to the voice uttered by the operator of the communication terminal 20A, the voice is picked up by the microphone 232 of the communication terminal 20B. Then, sound data is generated from the sound collected by the microphone 232, and the generated sound data is transmitted to the multipoint connection apparatus 10 (step S25). When the multipoint connection apparatus 10 receives the voice data transmitted from the communication terminal 20B, the multipoint connection apparatus 10 transmits the received voice data to the communication terminals 20A and 20C in which the session is established (steps S26 and S27). In the communication terminals 20A and 20C to which the audio data is transmitted, audio corresponding to the audio data is output from the speaker 222, and a person who operates the communication terminal 20A and a person who operates the communication terminal 20C are connected to the communication terminal 20B. The operator's voice can be heard. Again, since no session is established between the multipoint connection device 10 and the communication terminal 20D, voice data is not sent to the communication terminal 20D, and the person who operated the communication terminal 20D (legitimate participation in the conference) A person who is not a planner) cannot hear the voice of the operator of the communication terminal 20B.

  As described above, according to the present embodiment, if a password known only by a prospective participant in a conference is not correctly input at the communication terminal 20, a session between the multipoint connection device 10 and the communication terminal 20 is performed. The communication terminal 20 can no longer communicate with the multipoint connection device 10, so that it is possible to prevent the voice of the conference from being heard by a person other than those scheduled to participate in the conference.

[Modification]
As mentioned above, although embodiment of this invention was described, for example, you may implement this invention, changing embodiment mentioned above as follows.

In the above-described embodiment, after the multipoint connection apparatus 10 receives the NOTIFY message including the password and the session between the multipoint connection apparatus 10 and the communication terminal 20 is maintained, the multipoint connection apparatus 10 receives the predetermined event. The SUBSCRIBE message and the guidance data may be transmitted to the communication terminal 20 that has established the session to request a password.
For example, the multipoint connection apparatus 10 stores a conference schedule table corresponding to the off-record mode. When the conference participant wants to talk only with a specific person among the participants while the audio conference is continuing, the multi-point connection device 10 is operated in the off-record mode by operating the terminal operation unit 242 of the communication terminal 20. Send information.
When the multipoint connection device 10 receives the information in the off-record mode, the multipoint connection device 10 transmits a SUBSCRIBE message and guidance data to the terminal having the SIP address stored in the conference schedule table corresponding to the off-record mode, and requests a password. When a password different from the password stored in the conference schedule table corresponding to the off-record mode is received, the session with the communication terminal 20 that has transmitted the different password may be terminated.

  In the above-described embodiment, the multipoint connection device 10 may mix the voice represented by the voice data transmitted from the communication terminal 20 and transmit the voice data representing the mixed voice to the communication terminal 20. For example, when the voice data is transmitted from the communication terminals 20A to 20C, the multipoint connection device 10 mixes the voice represented by the voice data transmitted from the communication terminals 20B and 20C with respect to the communication terminal 20A. The voice data of the mixed voice is transmitted to the communication terminal 20A, the voice represented by the voice data transmitted from the communication terminals 20A and 20C is mixed to the communication terminal 20B, and the voice data of the mixed voice is sent to the communication terminal 20B. It is also possible to mix the voice represented by the voice data transmitted from the communication terminals 20A and 20B to the communication terminal 20C and send the voice data of the mixed voice to the communication terminal 20C. That is, for a communication terminal that has transmitted audio data, the audio of audio data transmitted from a communication terminal other than the communication terminal may be mixed and the audio data of the mixed audio may be transmitted.

1 is an overall configuration diagram of an audio conference system 1 according to an embodiment of the present invention. 2 is a hardware configuration diagram of a communication terminal 20 related to the audio conference system 1. FIG. It is a hardware block diagram of the multipoint connection apparatus 10 concerning the audio conference system 1. FIG. It is the figure which illustrated the format of meeting schedule table TB1. It is a figure for demonstrating operation | movement of the audio conference system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Voice conference system, 10 ... Multipoint connection apparatus, 20A-20D ... Communication terminal, 30 ... Communication network, 110 ... Communication interface, 140 ... Control part, 140A ... CPU, 140B ... ROM, 140C ... RAM, 140D ... storage unit, 210 ... communication interface, 221 ... DA converter, 222 ... speaker, 231 ... AD converter, 232 ... Microphone, 241 ... Terminal control unit, 241A ... CPU, 241B ... ROM, 241C ... RAM, 241D ... Non-volatile memory, 242 ... Terminal operation unit, 250 ...・ Sound source

Claims (3)

Clock means to measure the date and time,
Storage means for storing a meeting start date and time, authentication information of a prospective participant of the conference, and a communication address of a communication terminal used by the prospective participant;
When the date and time measured by the clock means coincides with the start date and time stored in the storage means, authentication information is requested to the communication terminal of the communication address stored in association with the start date and time. A transmission means for transmitting the message;
Receiving means for receiving authentication information transmitted from the communication terminal that has received the message;
Determining means for determining whether or not the authentication information received by the receiving means matches the authentication information stored in the storage means in association with the communication address of the communication terminal that is the transmission destination of the message; ,
If the determination means determines that the authentication information matches, the communication terminal that transmits the authentication information and the voice communication means that transmits and receives the voice data;
A communication apparatus comprising: audio data distribution means for transmitting the audio data received by the audio communication means to a communication terminal different from the communication terminal that transmitted the audio data by the audio communication means.   While the voice data is being transmitted and received between the communication terminal and the communication device, according to the information transmitted from the communication terminal to the communication terminal having the communication address stored in the storage unit The communication apparatus according to claim 1, wherein the message is transmitted. Clock means to measure the date and time,
Storage means for storing a meeting start date and time, authentication information of a prospective participant of the conference, and a communication address of a communication terminal used by the prospective participant;
When the date and time measured by the clock means coincides with the start date and time stored in the storage means, authentication information is requested to the communication terminal of the communication address stored in association with the start date and time. Message sending means for sending a message;
Authentication information receiving means for receiving authentication information transmitted from the communication terminal that has received the message;
Judgment to determine whether or not the authentication information received by the authentication information receiving means matches the authentication information stored in the storage means in association with the communication address of the communication terminal that is the transmission destination of the message Means,
If the determination means determines that the authentication information matches, the communication terminal that transmits the authentication information and the voice communication means that transmits and receives the voice data;
A communication device comprising: audio data distribution means for transmitting the audio data received by the audio communication means to a communication terminal different from the communication terminal that transmitted the audio data by the audio communication means;
Voice data generating means for collecting voice and generating voice data representing the voice;
Message receiving means for receiving a message transmitted from the transmitting means;
Authentication information receiving means for receiving authentication information from a user;
Authentication information transmitting means for transmitting the authentication information received by the authentication information receiving means to the communication device;
Voice communication means for transmitting voice data generated by the voice data generation means to the communication device and receiving voice data transmitted from the communication device;
A voice communication system comprising: a communication terminal having voice output means for outputting voice represented by voice data received by the voice communication means.

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