JP4730964B2 - Simple telephone conference device - Google Patents

Description

  The present invention relates to a simple telephone conference apparatus having a function of diverting an existing telephone having a call control function in a system for transmitting a signal from a voice input / output apparatus to a telephone conference partner via a telephone line.

  In the case of a conventional telephone conference apparatus, it is usual to have a call control function for connecting to a party to perform a telephone conference together with an audio hands-free input / output function (for example, Patent Document 1).

  However, if the call control function is built in the telephone conference apparatus, the telephone conference apparatus becomes complicated and the apparatus price is expensive.

In addition, there is a telephone conference-compatible one having a three-party call function, a hands-free call function, etc. in the telephone itself. However, when this telephone is introduced, there is a disadvantage that an existing telephone for non-conference conference is wasted.
JP 2005-333446 A

  An object of the present invention is to provide a simple conference call apparatus capable of hands-free calling by connecting the apparatus of the present invention to an existing telephone.

In order to solve the above-mentioned problems, the present invention provides a telephone conference device to be inserted between a telephone main body and a handset connected to a telephone line, and a telephone main body connecting means for connecting to the handset connecting portion of the telephone main body. A handset connection means for connecting to the handset; a handsfree voice input / output means for performing a handsfree telephone conference; a handset disconnecting means for disconnecting the handset from the telephone body during a telephone conference ; Holders of Bei means for measuring the electrical signal level, the handset advance by measuring the electrical signal level to said telephone body when not disconnected from the telephone body, hands-free the handset is disconnected from the telephone body electrical signal level which at electrical signal level to said telephone body had been the measurements in a teleconference call And controlling so that the substantially same level.

  ADVANTAGE OF THE INVENTION According to this invention, the apparatus for carrying out a telephone conference simply using an existing telephone as it is can be provided.

  Hereinafter, the configuration of the present invention will be described using a telephone having a telephone function using a handset as an example. Note that this telephone is an example, and the present invention is applicable to a telephone apparatus having a telephone call function using a handset connected to a telephone line.

  FIG. 1 is a system configuration diagram of an embodiment to which a simple telephone conference device 5 of the present invention is applied. A simple telephone conference apparatus 5 according to the present invention is connected to a telephone line 3 via a telephone body 4. In addition, a handset 6 that is originally connected to the telephone body 4 is connected to the simple telephone conference device 5. The audio signals of the microphone 10 and the speaker 11 of the simple telephone conference device 5 are transmitted / received to / from the other party 1 via the telephone body 4, the telephone line 3 and the exchange 2.

  FIG. 2 is a block diagram of the simple telephone conference apparatus 5 of the present invention.

  The simple telephone conference device 5 includes a microphone 51, a speaker 52, an echo cancellation unit 53, a level control unit 54, a switching unit 55, a level measurement unit 56, and a control unit 57.

  When the simple telephone conference apparatus 5 is not functioned, the telephone voice signal flowing through the telephone line 3 and the telephone body 4 passes through the switching unit 55 and reaches the handset 6.

  The switching unit 55 is a circuit that switches to a telephone conference using the microphone 51 and the speaker 52 through the call using the handset 6, the level controller 54, and the echo canceling unit 53.

  The level measuring unit 56 is a circuit that measures the level of an electric signal when the telephone body 4 and the handset 6 are connected.

  The level control unit 54 adjusts the electric signal to the telephone body 4 at the time of the conference call using the microphone 51 and the speaker 52 of the simple telephone conference device 5 to be equal to the level of the electric signal from the handset 6. It is a circuit with functions.

  The controller 57 measures the level of the electric signal from the handset 6 measured by the level measuring unit 56 to the telephone body 4, the microphone 51 of the simple conference call device 5, and the telephone body 4 during a conference call using the speaker 52. Is a circuit having a function of controlling the level control unit so that the level of the electrical signal becomes equal to the level of the electrical signal from the handset 6.

  The echo canceling unit 53 compares the frequency component of the signal input from the microphone 51 with the signal from the other party of the call coming via the telephone body 4 and cancels if the echo has the same frequency. It is.

  Means for realizing this apparatus will be described with reference to FIGS. Since the electrical signal level between the existing telephone body and the handset varies depending on the model, when the electrical signal level from the handset 6 is measured by the level measuring unit 56 and the telephone conference using the simple conference call device 5 is performed, The level control unit 54 controls the electric signal level so that the electric signal level from the microphone 51 to the switching unit 14 and the telephone body 4 is the same via the echo cancellation unit 53.

  As described above, the telephone conference using the call control of the existing telephone can be realized by inserting the simple telephone conference device 5 between the telephone body 4 and the handset 6.

  In order to conduct a conference call with a multipoint, a multipoint conference call apparatus capable of controlling calls with a multipoint may be introduced, or a multipoint conference call service provided by a communication company or the like may be used.

  Furthermore, the present apparatus can be applied to one-to-one normal calls other than the telephone conference use, and can give a hands-free call function to an existing telephone that does not support hands-free calls.

System configuration diagram to which the simple telephone conference device of the present invention is applied Block diagram of internal configuration of simple telephone conference apparatus of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Call partner 2 Switch 3 Telephone line 4 Telephone main body 5 Simple telephone conference apparatus 51 Microphone 52 Speaker 53 Echo cancellation part 54 Level control part 55 Switching part 56 Level measurement part 57 Control part 6 Handset

Claims (1)

A telephone conference apparatus to be inserted between a telephone main body and a handset connected to a telephone line, the telephone main body connecting means for connecting with the handset connecting portion of the telephone main body, the handset connecting means for connecting with the handset, and a hands Hands-free voice input / output means for performing a telephone conference free, handset disconnecting means for disconnecting the handset from the telephone body during a telephone conference, means for measuring an electrical signal level to the telephone body, The electric signal level to the telephone body is measured when the handset is not disconnected from the telephone main body, and the electric signal to the telephone main body is held when the handset performs a hands-free conference call separated from the telephone main body. this controlled so that the level becomes the electrical signal level and substantially the same level that has been said measurement Simple telephone conference apparatus according to claim.

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