JPH08163225A - Hands free telephone system - Google Patents

Abstract

PURPOSE: To always surely receive the telephone service of only call reception without being affected by the audio environment of a receiving terminal. CONSTITUTION: At the time of call originating speech, a decision control part 13 decides whether the telephone number of a call originating party is matched with a registered telephone number previously registered in a storage part 12 as a registered telephone number to receive the telephone service of call reception or not. When the decision control part 13 decides that the telephone number of the call originating party is matched with the registered telephone number, under the control of the decision control part 13, a voice switch 5 turns off a switch 21 and turns on a switch 20, a hands free telephone system 1A is switched to a call receiving operation only, and the transmission from the call originating party registered as the registered telephone number is clearly received in a state of cutting off the surrounding noise of the call receiving terminal or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hands-free telephone device,
In particular, the present invention relates to a hands-free telephone device equipped with a voice switch for switching an office line to a communication path determined to have a high level.

[0002]

2. Description of the Related Art A hands-free telephone device is known which is provided with a control circuit of a voice switching system which compares a transmission voice level with a reception voice level and switches a station line to a high level side to make a call. In this type of hands-free telephone device, when transmission and reception are performed at the same time, in order to prevent the occurrence of resonance of the transmission sound with respect to the reception sound, the transmission level and the reception level are compared every moment, and the voice level is compared. The switch switches the office line to the high-level side to make a call.

FIG. 3 is a schematic block diagram showing the structure of a conventional conventional hands-free telephone device, and FIG. 4 is a flow chart showing the operation of the conventional hands-free telephone device.

In FIG. 3, reference numeral 1 is a hands-free telephone device. The hands-free telephone device 1 is connected to a central office line 2. The hands-free telephone device 1 is provided with a reception path R and a transmission path S. At the end of R, the talker 2
The speaker 3 for receiving the received sound from the speaker is connected, and the microphone 4 for transmitting the transmitted sound from the speaker to the station line 2 is connected to the end of the transmission path S. The reception path R and the transmission path S are provided with amplifiers (not shown) for amplifying the reception sound and the transmission sound, respectively, and further provided with a voice switch 5.

The voice switch 5 includes a switch 20 arranged on the receiving path R and a switch 21 arranged on the transmitting path S.
And the level of the received sound from the station line 2 to the speaker 3 and the level of the transmitted sound from the microphone 4 to the station line 2,
When the levels of the received sound are high, the results are compared with each other as shown in FIG.
As shown in (a), the switch 20 is turned on and the switch 2 is turned on.
When 1 is turned off, the office line 2 is switched and connected to the receiving path R, and when the level of the transmitted sound is high, the switch 20 is turned off and the switch 21 is turned on as shown in FIG. By switching and connecting the station line 2 to the transmission path S, it has a function of preventing resonance of the transmission sound with respect to the reception sound.

The operation of the conventional hands-free telephone device having such a configuration will be described with reference to the flowchart of FIG.

In step S1, the hands-free telephone device 1
When a call starts via the station line 2, the voice switch 5 compares the level of the receiving sound of the receiving channel R with the level of the transmitting sound of the transmitting channel S in step S2, and the level of the transmitting voice is compared. Is higher than the level of the received sound, the process proceeds to step S4, the switch 20 is turned off, and the switch 2 is turned on.
1 is set to ON, the received sound from the office line 2 to the speaker 3 is cut off, and the call state of only the transmission from the microphone 4 to the office line 2 is set.

In step S2, the voice switch 5
When it is determined that the received sound level is higher than the transmitted sound level, the process proceeds to step S3, the switch 21 is turned off, the switch 20 is turned on, and the microphone 4
The transmission sound from the station to the station line 2 is cut off, and the call state of only the reception by the speaker 3 is set.

Then, step S3 or step S4
To the step S5, and the hands-free telephone device 1
The operations of steps S2 to S4 are repeated until the end of the call via the station line 2 is confirmed. When the end of the call is confirmed at step S5, the call operation of the hands-free telephone device 1 ends. To do.

By doing so, the sound received from the speaker 3 enters the transmission path S from the microphone 4 as the transmission sound, and inside the hands-free telephone device 1, a part of the transmission sound is a sidetone. As a result, it is possible to prevent the resonance generated from the speaker 3.

[0011]

By the way, there is used a telephone service in which various information services are received by receiving a call by dialing a specific telephone number using a telephone device. This kind of telephone service is not limited to time signals and weather forecasts, but in recent years, there is a commodity price information service that reports the standard retail price of seafood on the day, and is widely used.

When the conventional hands-free telephone device 1 is to receive these telephone services, if there is a high level of ambient noise at the outgoing end during the outgoing call, the voice switch 5 shuts off the receiving path R. Then, the call may be switched to only the transmission sound of the transmission path S. In such a state, the transmission of the telephone service information via the station line 2 is cut off, and the target telephone service Information may not be received reliably.

The present invention has been made in view of the present situation of the hands-free telephone device as described above, and an object thereof is to ensure a telephone service only for receiving a voice without being influenced by a voice environment of a receiving end. It is to provide a hands-free device capable of receiving.

[0014]

In order to achieve the above object, the present invention provides a comparison circuit for comparing a transmission voice level and a reception voice level, and a communication path determined to be high level by the comparison circuit. A hands-free telephone device equipped with a voice switch for switching office lines, and a storage means for storing a specific telephone number as a registered telephone number and whether or not the telephone number of a calling party matches the registered number. And a control means for switching the call to only the receiving call when it is determined by the determining means that the telephone number of the calling party matches the registration number.

[0015]

According to the present invention, during the outgoing call, the telephone number of the calling party is matched by the judging means with the registered telephone number stored in advance in the storage means as the registered telephone number for receiving the telephone service for receiving the call. Whether or not it is determined. Then, when it is determined that the telephone number of the calling party matches the registered telephone number, the control unit switches the voice switch to only the receiving call, and the sending party from the calling party registered as the registered telephone number It is received clearly with the surrounding noise at the receiving end blocked.

Further, during the outgoing call in which it is determined that the telephone number of the calling party does not match the registered telephone number by the determining means and during the normal incoming call, the comparing circuit compares the transmitted voice level and the received voice level. By comparison, the voice switch switches the office line to the call path determined to be at a high level, and the call is stably performed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic block diagram showing the configuration of this embodiment, and FIG. 2 is a flow chart showing the operation of this embodiment.

Hands-free telephone device 1A according to this embodiment
As shown in FIG. 1, similarly to the conventional hands-free telephone device 1 which has already been described with reference to FIG. 3, the hands-free telephone device 1A is connected to the central office line 2, and the hands-free telephone device 1A Is provided with a reception path R and a transmission path S, and a speaker 3 for a speaker to receive a reception sound from the station line 2 at the time of a call is connected to an end portion of the reception path R, and an end portion of the transmission path S is provided. A microphone 4 for transmitting a transmission sound from a speaker to the station line 2 is connected to the. The reception path R and the transmission path S are provided with amplifiers (not shown) for amplifying the reception sound and the transmission sound, respectively, and further provided with a voice switch 5.

The voice switch 5 includes a switch 20 arranged on the receiving path R and a switch 21 arranged on the transmitting path S.
And the level of the received sound from the station line 2 to the speaker 3 and the level of the transmitted sound from the microphone 4 to the station line 2,
When the level of the receiving sound is high, the station line 2 is switched and connected to the receiving path R, and when the level of the transmitting sound is high, the station line 2 is switched and connected to the sending path S. Thus, it has a function of preventing resonance of the transmitted sound with respect to the received sound.

Further, in the present embodiment, a specific telephone number for receiving the telephone service of only receiving the telephone such as the time signal, the weather forecast, and the product price information is stored as the registered telephone number,
A storage unit 1 for temporarily storing the other party's telephone number when making a call
2 is provided, and this storage unit 12 is connected to the dial button 11. Further, in the present embodiment, a computer for determining whether or not the telephone number of the calling party matches the registered number at the time of calling and, if they match, outputs a fixed reception signal to the voice switch 5 is used. The determination control unit 13 is provided, and the storage unit 12 is provided at an input terminal of the determination control unit 13.
The output terminal of the determination control unit 13 is connected to the voice switch 5. The operation of this embodiment having such a configuration will be described with reference to the flowchart of FIG.

When an outgoing call is started in step S11 and the caller dials a desired telephone number with the dial button 11, the telephone number is input and stored in the storage unit 12 in step S12, and the process proceeds to step S13 to make a determination. Control unit 1
3 operates, and it is determined whether or not any of the registered telephone numbers stored in the storage unit 12 in advance matches the input telephone number. If it is determined in step S13 that the input telephone number matches the registered telephone number stored in the storage unit 12, the process proceeds to step S14,
The reception control signal is output from the determination control unit 13 to the voice switch 5, and the reception control signal sets the switch 21 of the voice switch 5 to OFF and the switch 20 to ON. For this reason, a hands-free telephone device 1A
Then, a call is made only through the reception path R, and even if the reception end is in a noisy environment, the sound at the reception end is the line 2
However, the telephone service information from the station line 2 can be continuously and clearly heard at the receiving end. Then, if it is determined in step S15 that the telephone service from the central office line 2 has ended. Hands-free telephone device 1
The reception of the telephone service information by A is completed.

On the other hand, if it is determined in step S13 that the input telephone number does not match any of the registered telephone numbers, the process proceeds to step S16, in which the voice switch 5 causes the level of the reception sound of the reception channel R to be received. And the level of the transmission sound of the transmission path S are compared every moment. If the level of the transmission sound is higher than the level of the reception sound, the process proceeds to step S18, the switch 20 is turned off, and the switch 21 is turned on. Is set to ON, the received sound from the office line 2 to the speaker 3 is cut off, and the call state of only the transmission from the microphone 4 to the office line 2 is set.

If the voice switch 5 determines in step S16 that the received sound level is higher than the transmitted sound level, the process proceeds to step S17, in which the switch 21 is turned off and the switch 20 is turned on. Then, the transmission sound from the microphone 4 to the office line 2 is cut off, and the call state of only the reception by the speaker 3 is set.

Then, step S17 or step S
From step 18, the process proceeds to step S19, and the operations of steps S16 to S18 are repeated until the end of the call through the central line 2 of the hands-free telephone device 1A is confirmed, and the end of the call is confirmed at step S19. When done,
The operation of the hands-free telephone device 1A ends.

By doing so, the received sound from the speaker 3 enters the transmission path S from the microphone 4 as a transmission sound, and a part of the transmission sound is a sidetone inside the hands-free telephone device 1A. As a result, the resonance emitted from the speaker 3 is prevented, and a call is made with the receiving terminal of the other party while maintaining a stable call state. It should be noted that the dial button 11 is operated to change or add a registered telephone number for receiving a telephone service.

As described above, according to the present embodiment, when the telephone number input from the calling terminal coincides with the registered telephone number registered in advance in the storage unit 12 for receiving the telephone service for receiving only the voice, the voice By the switch 5, the switch 21 of the transmission path S is turned off and the switch 20 of the reception path R is turned off.
Is set to ON and only the receiving operation is performed through the receiving path R, so that the telephone service of only receiving the call from the registered telephone number registered in advance is not affected by the voice environment of the receiving end, for example, the receiving end is noisy. Even if you are in the environment, you can hear continuously and clearly.

Further, during the outgoing call in which it is determined that the telephone number of the calling party does not match the registered telephone number by the decision control unit 13 and during the normal incoming call, the sending voice level and the receiving voice level are determined and controlled. The voice switch 5 sequentially switches the office line 2 to the communication path, which is compared with each other by the unit 13 and is determined to be at a high level, and stable communication is performed.

[0029]

According to the present invention, at the time of an outgoing call, it is determined whether or not the telephone number of the called party coincides with a predetermined telephone number registered and stored as a registered telephone number, and the telephone of the called party is called. If it is determined that the number matches the registered number, the voice switch will switch to listen only.
The telephone service information from the telephone number that is about to receive the receiving telephone service registered as the registered telephone number can be received reliably and reliably without being affected by the voice environment of the receiving end, with ambient noise at the receiving end blocked. It is possible to receive clearly.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the same embodiment.

FIG. 3 is a schematic block diagram showing a configuration of a conventional hands-free telephone device.

FIG. 4 is a flowchart showing the operation of a conventional hands-free telephone device.

[Explanation of symbols]

 1A Hands-free telephone device 2 Station line 3 Speaker 4 Microphone 5 Voice switch 11 Dial button 12 Storage section 13 Judgment control section 20, 21 Switch

Claims (1)

[Claims] 1. A hands-free telephone device comprising a comparison circuit for comparing a transmission voice level and a reception voice level, and a voice switch for switching an office line to a communication path determined to be high level by the comparison circuit. The storage means for storing a specific telephone number as a registered telephone number, the determination means for determining whether or not the telephone number of the calling party matches the registered number, and the determining means A hands-free telephone device, comprising: a control means for switching the call to only receiving when it is determined that the telephone number matches the registration number.