JP2000286974A - Visitor call system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a visitor call system capable of improving a speech quality considering the noise environment of a place where a lobby interphone is installed. SOLUTION: This visitor call system performs communication between a lobby interphone 4 installed in the public entrance or the like of a multiple dwelling house and a household information panel (base unit 1) provided in each house and the lobby interphone 4 gathers the surrounding noises. When the value of these surrounding noises is low, the volume of a speaker sound output of a speaker 4c from the lobby interphone 4 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visitor communication system for making a call between a lobby intercom provided at a common entrance of an apartment house and a housing information panel provided in each dwelling unit.

[0002]

2. Description of the Related Art A visitor call system for an apartment house is installed in an apartment or the like in which an auto-lock system is installed, and a visitor is required to unlock an automatic door at a common entrance leading to the entrance of a dwelling unit. 1 to enter the apartment
It is necessary to make a call by calling the dwelling unit to be visited from the lobby intercom of the visitor call system provided in the common entrance (lobby) on the floor.

FIG. 4 shows an example of an integrated board system incorporating a visitor communication system. The integrated board system shown in the figure
A system with HA-related functions and crime prevention / disaster prevention functions. 1 is a main unit installed in each dwelling unit, 2 is a telephone set installed in each dwelling unit and connected to the main unit 1 A sub-master unit, which is an additional unit, 3 is an integrated panel provided in the manager's office, and 4 is a lobby intercom which is installed at the common entrance and connected to the integrated panel 3. In addition, 5 is installed at the entrance of each dwelling unit.
This is a door phone for dwelling units that is connected to.

[0004] Master unit 1 is connected to lobby intercom 4 via integrated board 3, and when a visitor operates a push button or the like of call operation unit 4 a of lobby intercom 4 to call a dwelling unit to be visited, the main unit 1 enters the dwelling unit. A ringing tone is output from the speaker of the installed base unit 1, and the resident can use the handset 1a of the base unit 1.
If you pick up, it is configured to be able to talk with visitors. The resident uses the handset of the base unit 1 and the visitor uses the telephone microphone 4b and the loudspeaker 4c built in the lobby intercom 4 to make a telephone conversation.

[0005]

As described above, the lobby intercom 4 shown in FIG. 4 is constructed so as to be capable of making a voice call. The input voice is configured to be output from the loud-speaker 4c built in the lobby intercom 4. However, in a quiet lobby or when the level of noise such as midnight is low, the lobby interphone 4 The sound output from the loudspeaker 4c built into the speaker 4 reverberates in the lobby, and other people in the lobby may feel loud or visitors may feel uncomfortable, resulting in poor call quality. There was a problem. In addition, if the volume of the call voice flowing from the loudspeaker 4c is large and the visitor feels uncomfortable, the visitor thinks that the resident will feel noisy unless he / she speaks with a low voice. There was a problem that it became difficult for residents to hear the whisper.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a structure of a visitor communication system capable of improving the communication quality in consideration of the noise environment of a place where a lobby intercom is installed. To provide.

[0007]

According to a first aspect of the present invention, there is provided a customer call system for making a call between a lobby intercom provided at a common entrance of an apartment house and a housing information panel provided at each dwelling unit. In the visitor call system, the lobby intercom collects ambient noise, and when the value of the ambient noise is low, the value of the ambient noise is set so that the call sound output from the speaker of the lobby interphone becomes low. The level of the call voice output from the speaker is changed accordingly.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a visitor communication system according to the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram for explaining the operation of a lobby intercom of a visitor call system according to the present invention, FIG. 2 is a circuit diagram of a base unit as a house information panel, FIG. 3 is a circuit diagram of a lobby intercom, and FIG. FIG.

In FIG. 4, a master unit 1 installed in each dwelling unit has:
It is equipped with a handset 1a and is connected to a lobby intercom 4 installed at a common entrance (lobby) via an integrated board 3 provided in a management room, and is connected to a door phone 5 for dwelling units installed at the entrance of each dwelling unit. In addition, it is possible to make a call with a visitor using the lobby intercom 4 and the door phone for dwelling unit 5 or a manager using a call system built in the integrated board 3. The lobby intercom 4 includes a telephone microphone 4b and a loud speaker 4.
c is built in.

Next, a circuit of the master unit 1 which is a house information panel will be described with reference to FIG. The master unit 1 includes a CPU 6, various sensor input circuits 7, a multiplex transmission interface 8 for transmitting and receiving control signals to and from the integrated panel 3, and a living building monitoring panel interface 9 for connecting to a disaster prevention monitoring panel or the like.
A key matrix circuit 10; various push buttons 11; a call circuit block 12 for talking with the lobby intercom 4 or the door intercom 5 for the dwelling unit or the sub master unit 3; an EEPROM 13 storing various settings; A sound IC 14 for inputting a signal and outputting a sound, and a sound IC 14
Output circuit 1 that inputs the output of the system and outputs audio to the broadcast, main unit speaker, additional speaker, and sub master unit
5 and the output of the sound IC 14
A door phone alarm output circuit 16 for outputting an alarm to the door phone for dwelling unit 5 via the interface, and a display circuit block 17 for performing various displays on the surface of the base unit 1 are provided.

In the circuit shown in FIG. 2, the base unit 1 is connected to the integrated board 3 via a signal line connected to a terminal of a residential building communication line 12a provided in the communication circuit block 12, and A communication path is formed on the signal line connected to the communication line 12a, and the communication voice is transmitted. Call control and control for forming a communication path are performed via a multiplex transmission interface 8 for transmitting and receiving control signals to and from the integrated board 3.

Next, the lobby intercom 4 will be described with reference to FIG.
Will be described. The lobby intercom 4 includes a main CPU 18, a sub CPU for a terminal, and a transmission / reception circuit, is connected to a data bus of the main CPU 18, and transmits a multiplex signal to and from the integrated board 3. A sub-CPU 20 for controlling a display device (LED) and a key matrix circuit provided on a front panel of the intercom 4, and an EEPROM for storing various settings
21, a function setting switch 22, a camera block circuit 23 for capturing a visitor, a signal line connected to the call microphone 4 b and the loudspeaker 4 c, and connected to the terminal of the call A or the call B A door phone block circuit 24 for transmitting a call voice via a telephone, and a built-in variable gain control circuit, which amplifies the call voice transmitted from the integrated board 3 at an amplification factor (gain) according to an instruction from the CPU 18 to raise a voice call. Amplifier 25 that outputs to speaker 4c
And the ambient noise input via the call microphone 4b to A /
An ambient noise input interface 26 that performs D conversion and outputs the result to the CPU 18 is provided.

In the circuit shown in FIG. 3, the lobby intercom 4 is connected to the integrated board 3 via a signal line connected to a terminal for a call A or a call B provided in the intercom block circuit 24.
It is configured to mutually transmit a call voice between and. Call control, control for forming a communication path, and the like are performed via a multiplex signal transmission circuit 19 for transmitting and receiving control signals to and from the integrated board 3.

Next, the procedure for making a call and the operation of each component will be described. First, when the visitor operates a push button or the like of the call operation unit 4a of the lobby intercom 4 to perform an operation of calling the dwelling unit to be visited, the call is made to the integrated board 3 via the multiplex signal transmission circuit 19 of the lobby intercom 4. The information of the opened dwelling unit and a control signal indicating that there is a call are transmitted. Thereby, the integrated board 3 transmits a control signal via the multiplex transmission interface 8 of the master unit 1 provided in the dwelling unit and sounds a ringing tone.

The resident is the handset 1a of the base unit 1.
, The base unit 1 transmits a control signal for responding to the integrated board 3. Then, a control signal for establishing a communication path via the multiplex transmission path is output from the integration board 3, and a communication path is formed between the lobby intercom 4 and the base unit 1 to enable a communication.

In the case of the lobby intercom 4 shown in FIG.
The call microphone 4b, into which the visitor inputs voice, also serves as an input device for collecting ambient noise. The ambient noise in a state where the visitor does not input voice is input to the ambient noise input interface via the door phone block circuit 24. 26.
Then, the ambient noise input interface 26 A / D converts the input ambient noise signal and outputs the signal to the main CPU 18. The main CPU 18 detects the level of the ambient noise, obtains a preset gain in accordance with the level of the ambient noise, sends a control signal for performing amplification with the gain to the speaker amplifier 25, and controls the amplification factor. The configuration is such that the gain (gain) of the speaker amplifier 25 increases as the level of the ambient noise increases. As a result, when the lobby is quiet, a low-volume call voice corresponding to the environment is output from the loudspeaker 4c. Further, the communication microphone 4b is always operated, and the gain of the speaker amplifier 25 is dynamically changed according to the change of the ambient noise.

One embodiment of controlling the volume of the call voice output from the lobby intercom 4 will be described with reference to FIG. In the figure, (a) is a diagram in which the horizontal axis is the time axis and the vertical axis is the level of the ambient noise, and shows the values of the three types of ambient noise levels input to the telephone conversation microphone 4b. (B) is a diagram showing the level of the call voice output from the loud-speaker 4c. FIG. 3C is a diagram showing an amplification factor (gain) of the speaker amplifier 25 which receives a control signal from the main CPU 18 and changes the amplification factor.

FIG. 1 shows a case where the noise level is at midnight or a noise level in a quiet residential area is input to the lobby intercom 4 (ambient noise level is about 40 dB), and a case where the noise level is during the day or an average time. When the ambient noise of a residential area with a high noise level is input to the lobby intercom 4 (the ambient noise level is about 60 dB), the ambient noise of a noise level in a place such as an expressway where traffic noise pollution becomes a problem When input to the intercom 4 (the ambient noise level is 80d
(About B) is a diagram showing how the level of the call voice output from the loudspeaker 4c is controlled. In the example shown in the figure, the ambient noise level is 40 d
As the gain increases to about B, about 60 dB, and about 80 dB, the gain of the speaker amplifier 25 becomes A2 by the variable gain control circuit built in the speaker amplifier 25.
(DB), A1 (dB), and A0 (dB), indicating that the volume of the call voice output from the loudspeaker 4c is increased.

As described above, since the volume of the call voice output from the lobby intercom 4 is controlled in accordance with the ambient noise of the lobby, it is possible to prevent the loud call voice from reverberating in a quiet lobby. can do. Also,
The lobby intercom 4 has a function to collect ambient noise and control the volume of the call voice output from the loud speaker 4c, so that a circuit such as a variable gain control circuit can be added to the lobby intercom 4 regardless of the number of dwelling units. It is only necessary to provide the customer communication system, and the visitor communication system can be configured at low cost.

[0020]

According to the first aspect of the present invention, a call voice having a volume corresponding to the ambient noise in the lobby is output from the loud-speaker, and other people in the lobby feel noisy or visit. Since it is possible to prevent the user from feeling uncomfortable, the call quality can be improved. In addition, since a circuit such as a variable gain control circuit that controls the volume of the call voice output from the speaker for loud calls is built into the lobby intercom, the circuit such as the variable gain control circuit is only provided for the lobby intercom regardless of the number of dwelling units. It is sufficient to provide such a structure, and the visitor communication system can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining an operation of a lobby intercom in a visitor call system of the present invention.

FIG. 2 is an embodiment of a circuit diagram of a master unit as a house information panel.

FIG. 3 is an embodiment of a circuit diagram of a lobby intercom;

FIG. 4 is a system configuration diagram of a visitor communication system.

[Explanation of symbols]

1 Base unit (housing information panel) 4 Lobby intercom 4c Loudspeaker for loudspeaker (speaker)

Claims (1)

[Claims] 1. A visitor communication system for making a call between a lobby intercom provided at a common entrance of an apartment house and a housing information panel provided at each dwelling unit, wherein the lobby interphone collects ambient noise. Sound, and when the value of the ambient noise is low, the level of the call voice output from the speaker is changed according to the value of the ambient noise so that the call voice output from the speaker of the lobby intercom becomes low. A visitor communication system characterized by being configured as follows.