JP2003250151A - Video interphone system provided with composite video image display function for visitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video interphone system provided with a plurality of camera means, wherein a monitor television receiver can confirm visitor video images imaged by the plurality of camera means at the same time. <P>SOLUTION: A control unit 1 includes: a camera attached intercome slave unit 4; an input terminal T1 for connection of a surveillance camera 5; a master unit connection terminal T2 for connection of a master unit 3; a camera of the intercome slave unit 4; a speech circuit thereof; a drive power supply circuit for supplying power to the surveillance camera 5; a video/speech control circuit for discriminating a call from the intercome slave unit 4 to supply power from the drive power supply circuit to the called intercome slave unit 4 and the surveillance camera 5, transmitting a visitor's video image and a supervisory video image to the master unit 3, and controlling transmission/reception of a voice signal for a speech between the both; and a video composite circuit for display on the master unit 3, and the video composite circuit generates a composite image wherein the visitor's video sent from the camera of the intercome slave unit 4 receiving the call is used for a main image and the supervisory video image sent from the surveillance camera 5 is used for a sub image. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a television intercom system having a function of displaying an image of a visitor.

[0002]

2. Description of the Related Art Conventionally, a television intercom system having a function of displaying an image of a visitor has been widely used in general dwelling units, and at least a plurality of intercom subunits with a camera installed at a front door or a doorway. And a monitor TV to which these are connected.

In this system, when there is a call from any of the intercom subunits with a camera, the monitor TV displays
The video of the visitor picked up by the intercom subunit is displayed to make a call with a ringing tone. Then, if a predetermined response operation is performed, a call circuit with the intercom subunit is formed, and a call can be made with the visitor while confirming the visitor image.

[0004]

However, in the above-described conventional TV intercom system, when the face of the visitor is located outside the imaging range of the intercom subunit, the visitor's face is not included in the visitor image, Therefore, there is a problem that the face of the visitor cannot be confirmed on the monitor TV.

In addition, any of the intercom subunits, for example,
When a call is received from another doorphone subunit, for example, a doorphone subunit at the doorway, during a call with the doorphone subunit at the entrance, a ring tone is output on the monitor TV, and the call is switched to the other side. I was able to make a call, but the video of that visitor was not displayed and I could not see what kind of visitor there was, which was inconvenient.

The present invention has been made in consideration of the above circumstances, and is a television intercom system provided with a plurality of camera means, and a visitor image picked up by these camera means is displayed on one monitor television. The purpose is to provide a TV intercom system that can be simultaneously checked in.

[0007]

In order to achieve the above object, in a television intercom system according to claim 1 of the present invention, a door intercom subunit with a camera installed outdoors and a monitor TV installed indoors. And a surveillance camera connected to a control unit, the control unit connecting the intercom subunit with camera, an input terminal for connecting the surveillance camera, and the monitor TV. Connection terminal for the base unit, the camera of the intercom child device, its call circuit,
And a drive power supply circuit for supplying power to the surveillance camera and a call from the intercom subunit with camera, and the power supply from the drive power supply circuit to the intercom subunit with camera and the surveillance camera Is supplied to the monitor TV to send the visitor video and the monitor video to the monitor TV, and a video / call control circuit for controlling transmission / reception of a voice signal for a call between them and a video composition circuit to be displayed on the monitor TV. This video compositing circuit forms a composite image with the visitor video sent from the camera of the intercom subunit that received the call as the main screen and the surveillance video sent from the surveillance camera as the sub-screen. Is characterized by.

In the TV intercom system according to the second aspect, the TV intercom is configured by connecting a plurality of intercom subunits with cameras installed outdoors and a monitor TV installed indoors to a control unit. In the system, the control unit has an input terminal for connecting a plurality of intercom subunits with cameras,
A master terminal for connecting a monitor TV, a camera for the intercom slave, a drive power supply circuit for supplying power to the call circuit, and a composite of the visitor images sent from multiple called intercom slaves. The video synthesizer circuit and the call from the intercom subunit with camera are identified, and the power from the drive power circuit is supplied to the called intercom subunit with camera, and the video synthesizer circuit is used for the monitor TV. It is equipped with a video / call control circuit that sends and receives the formed composite image of the visitors and controls the transmission and reception of a voice signal for a call between both parties, and the video synthesizing circuit is the intercom subunit that first calls. Form a composite video image with the visitor video sent from the camera of the main camera as the main screen, and the visitor video sent from the camera of the intercom slave that made the call later as the sub screen. It is way.

In the television intercom system according to a third aspect of the present invention, the television intercom system is configured by connecting a plurality of intercom subunits with cameras installed outdoors and a monitor TV installed indoors to a control unit. In the system, the control unit has an input terminal for connecting a plurality of intercom subunits with cameras,
A master terminal for connecting a monitor TV, a camera for the intercom slave, a drive power supply circuit for supplying power to the call circuit, and a composite of the visitor images sent from multiple called intercom slaves. The call from the video intercom circuit and the intercom slave with camera is identified, and power is supplied from the drive power supply circuit to the intercom slave with camera that called, and the intercom slave called , And a video / call control circuit that controls the connection with the monitor television to send out the guest composite video formed by the video synthesizing circuit and controls the sending and receiving of a voice signal for a call between them. The video synthesizing circuit uses the visitor video sent from the camera of the intercom subunit that made the call first as the main screen until the call is answered on the monitor TV, and the call is delayed. While forming a composite video image to the sub-screen visitor image sent from Honko device camera,
After responding on the monitor TV, it forms a composite video screen with the visitor image sent from the intercom subunit, which is the other party of the call, as the main screen, and the visitor image transmitted from the other intercom subunits as the sub screen. I am trying.

In the television intercom system according to the fourth aspect, the video synthesizing circuit uses the visitor video transmitted from the camera of the intercom subunit that first called as the main screen until the monitor television responds. , And while forming a composite video image that uses the visitor video sent from the camera of the intercom subunit that made a delay call as a sub-screen, after responding on the monitor TV, from the intercom subunit that is the other party of the call Only the transmitted guest image is formed as the main screen.

In the television intercom system according to the fifth aspect, the control unit monitors the security sensor connection terminals for externally connecting the fire sensor, the crime prevention sensor, the indoor caller, etc., and the operating states of these security sensors. When a call is made, a monitor control circuit for sending an alarm signal and an alarm image, which are specified in advance corresponding to the type of sensor, to the monitor television is further provided.

In the television intercom system according to the sixth aspect, the control unit has an electric lock connection terminal for connecting the electric lock unit, decodes the control signal from the monitor TV to apply the electric lock unit, It is characterized by outputting a locking and unlocking signal for unlocking.

According to a seventh aspect of the present invention, there is provided a television intercom system in which a door intercom subunit with a camera installed outdoors and a surveillance camera are connected to a monitor television installed indoors. Therefore, a monitor TV is an intercom subunit with a camera, an input terminal for connecting a surveillance camera, a camera of the intercom subunit, its call circuit, and a drive power supply circuit for supplying power to the surveillance camera, and a camera. The intercom subunit with the camera which distinguishes the call from the attached intercom subunit,
A video / call control circuit that supplies power from the drive power supply circuit to the surveillance camera to pick up a video image of each visitor and controls transmission and reception of a voice signal for a call with the intercom subunit. , A video synthesizer circuit that synthesizes the visitor video from the intercom slave and the surveillance camera is provided. In this video synthesizer circuit, the visitor video sent from the camera of the intercom slave that receives the call is used as the main screen and is monitored. It is characterized in that a composite image is formed with the monitor video sent from the camera as a sub-screen.

According to another aspect of the present invention, there is provided a TV intercom system in which a door intercom subunit with a camera installed outdoors and a surveillance camera are connected to a monitor TV installed indoors. Therefore, the monitor TV is called an intercom slave with camera, an input terminal for connecting the surveillance camera, a camera of the intercom slave, its call circuit, and a drive power supply circuit for supplying power to the surveillance camera. The video compositing circuit that synthesizes the visitor images sent from the multiple intercom subunits, and the call from any of the intercom subunits are identified, and the calling power supply circuit from the drive power supply circuit Power is supplied to display the composite image of the visitors formed by the image synthesis circuit, and the voice for the call with the called intercom subunit The video synthesizing circuit has a video / speech control circuit for controlling transmission / reception of the signal. A composite video image is formed by using the visitor video sent from the camera of the intercom subunit as a sub screen.

According to a ninth aspect of the present invention, there is provided a television intercom system in which a door intercom subunit with a camera installed outdoors and a surveillance camera are connected to a monitor television installed indoors. Therefore, the monitor TV is called an intercom slave with camera, an input terminal for connecting the surveillance camera, a camera of the intercom slave, its call circuit, and a drive power supply circuit for supplying power to the surveillance camera. The video compositing circuit that synthesizes the visitor images sent from the multiple intercom subunits, and the call from any of the intercom subunits are identified, and the calling power supply circuit from the drive power supply circuit Power is supplied to display the composite image of the visitors formed by the image synthesis circuit, and the voice for the call with the called intercom subunit A video / speech control circuit for controlling transmission / reception of the signal is sent from the camera of the intercom subunit that first called until the video compositing circuit responds to the call of the intercom subunit. A composite video image is formed with the visitor image as the main screen and the visitor image sent from the camera of the intercom subunit that made the call later as the sub-image, while after answering the call, the callee The main screen of the visitor video sent from the intercom slave
Other than that, the visitor image sent from the intercom subunit is formed as a composite image screen with a sub-screen.

In the television intercom system according to the tenth aspect of the present invention, the video synthesizing circuit transmits the visitor video transmitted from the camera of the intercom subunit that first makes a call until the video intercom unit responds to the call of the intercom subunit. While forming a composite video image with the main screen and the sub-screen that is the visitor video sent from the camera of the intercom subunit that made the call with a delay, after answering the call, the intercom that is the other party of the call Only the visitor image sent from the container is formed as the main screen.

In the television intercom system according to the eleventh aspect, the monitor television monitors security sensor connection terminals for externally connecting a fire sensor, a crime prevention sensor, a room caller, etc., and monitors the operating states of these security sensors. When a call is made, it is specified in advance for the monitor TV according to the type of sensor,
It is characterized in that it further comprises an alarm signal and a monitor control circuit for transmitting an alarm image.

In the television intercom system according to the twelfth aspect, the monitor television is provided with an electric lock connection terminal for connecting the electric lock unit, the control signal from the monitor TV is decoded, and the electric lock unit is provided. It is characterized by outputting a locking and unlocking signal for unlocking.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a main configuration of a television intercom system according to the present invention.

This is constructed by connecting at least a door intercom subunit 4 with a camera installed outdoors, one or a plurality of monitor televisions 3 installed indoors, and a surveillance camera 5 to a control unit 1. Has been done.

When there is a call from the intercom subunit 4 at either the entrance or the doorway, the control unit 1 supplies power to the intercom subunit 4 and the surveillance camera 5 that have called, and the visitor Take a picture.

Then, the image from the intercom subunit 4 (visiting image) and the image from the surveillance camera 5 (surveillance image) are sent to the monitor television 3. At the same time, the control unit 1 controls the intercom subunit 4. The visitor video sent from the camera is used as a main screen, and the surveillance video sent from the surveillance camera 5 is used as a sub-screen. At this time, the monitor TV 1 displays a composite image as shown in FIG.

At this time, the control unit 1 outputs a calling signal to the monitor television 1 to output a predetermined calling sound. On the other hand, if there is a predetermined response operation on the monitor TV 1, a call control is performed to form a call path between the calling intercom subunit 4 and the monitor TV 3 and enable a call between them. Make up.

The above-described processing will be described in detail in the flowchart (100 to 112) of FIG.

Further, in this TV intercom system, the control unit 1 includes the doorphone subunit 4 at either the front door or the arbitrary opening, for example, the doorphone subunit 4 at the front door.
When there is a call from, the power is supplied to the intercom subunit 4 that has called, and a video image of the visitor is picked up.

Then, an image with the visitor image from the intercom subunit 4 at the entrance as the main screen is sent to the monitor television 3. At this time, the monitor television 3 displays an image as shown in the upper part of FIG. At the same time, the control unit 1 outputs a calling signal to the monitor television 3 to output a predetermined calling sound. On the other hand, if a predetermined response operation is performed on the monitor TV 3, a call control is performed to form a call path between the calling intercom subunit 4 and the monitor TV 3 and enable a call between them. Make up.

At this time, if there is a call from the other intercom sub-unit 4, which is the self-directed intercom sub-unit 4, the control unit 1 also supplies power to the self-directed intercom sub-unit 4. , That monitor image as a composite video image obtained by capturing the visitor image and combining the captured visitor image as a sub screen with the visitor image on the doorphone subunit 4 side of the front door, which is configured as the main screen. To send.

At that time, the monitor television 3 displays an image as shown in the lower part of FIG.

At this time, the control unit 1 outputs a calling signal to the monitor television 3 to output a predetermined calling sound. On the other hand, if a predetermined response operation is performed on the monitor TV 3, a call control is performed to form a call path between the calling intercom subunit 4 and the monitor TV 3 and enable a call between them. Make up.

Here, the image display by the intercom subunits at both the entrance and the doorway may be in the following modes. That is, when the intercom subunit 4 is called, the intercom subunit 4 that first makes a call on the monitor TV 3.
A composite video image is displayed with the visitor image from (the entrance side in the above example) as the main screen, and the visitor image from the intercom sub-unit (the above example in the previous example) that made a delayed call as the sub screen. After the call is answered, the visitor image transmitted from the intercom subunit, which is the other party of the call, is displayed as the main screen, and the visitor images transmitted from the other intercom subunits are displayed as a sub-image screen.

Therefore, if the call is with the entrance side that first called, the display mode on the monitor TV 3 is as shown in the upper part of FIG. When switched, the visitor image on the side of the door is switched to the main screen, while the visitor image at the entrance is switched to the sub screen.

Further, the image display by the intercom subunits at both the entrance and the doorway may be in the following modes. That is, when the intercom subunit 4 is called, the intercom subunit 4 that first makes a call on the monitor TV 3.
A composite video image is displayed with the visitor image from (the entrance side in the above example) as the main screen, and the visitor image from the intercom sub-unit (the above example in the previous example) that made a delayed call as the sub screen. After the call is answered, only the visitor image sent from the intercom subunit 4, which is the other party of the call, is displayed as the main screen.

Therefore, if the call is made to the entrance side that first called, the display mode on the monitor TV 3 is as shown in the upper part of FIG. When it is switched, it is switched so that only the visitor image on the side of the selfish mouth is used as the main screen.

The control unit 1 is externally connected with various security sensors such as a crime prevention sensor 7, a gas sensor 8, a fire sensor 9, and a room caller 10 in addition to the above-mentioned constituent members.

With such a configuration, the control unit 1 monitors the operating states of these security sensors, and if the security sensor outputs an abnormal signal to the control unit 1 by detecting an abnormality or operating it, An alarm signal and an alarm image, which are specified in advance in accordance with the type of sensor, are sent to the monitor television 3.

The above-described processing will be described in detail in the flowchart (200 to 217) of FIG.

Further, an electric lock unit 6 is connected to the control unit 1, and when a predetermined lock / unlock is performed by a predetermined operation of the monitor TV 3, the monitor TV 3 outputs a lock / unlock command signal. This is input to the electric lock unit 6 to lock and unlock the electric lock unit 6.

In order to enable the above operation, in the present system, the control unit 1 and the monitor television 3 have the following internal structure.

That is, as shown in FIG. 6, the control unit 1 has an input terminal T1 for connecting the intercom subunit 4 and the monitoring camera 5, and a master unit connecting terminal T2 for connecting the monitor TV 3. At least a sensor connection terminal T3 for connecting various security sensors and an electric lock connection terminal T4 for connecting the electric lock unit 6 are provided.

Further, the CPU 10 for controlling the following units,
A camera selector circuit 11 that switches the input of a video signal from a camera such as the intercom subunit 4 or the surveillance camera 5, a video demodulation circuit 12 that demodulates the video signal, video converters 13 and 15, a graphics generation circuit 14, a video modulation circuit 16, and audio. Processing circuit 17, video RAM 18, intercom call detection circuit 19, I / F circuit 20 for connecting a predetermined expansion unit, control command I / F circuit 21 for outputting various control commands to monitor TV 3, various security I for connecting the sensor
/ O port 22, flash ROM 23, RAM 24,
Electric lock I / F circuit 2 for connecting the electric lock unit 6
And an I / O port 25 provided with 6.

In this control unit 1, the CPU
A driving power supply circuit is constituted by 10, and has a function of supplying power to the camera of the intercom subunit 4, its communication circuit, and the surveillance camera 5.

Further, the CPU 10 and the camera selector circuit 1
1, video demodulation circuit 12, video converter 13, 1
5, video modulation circuit 16, audio processing circuit 17, video R
The video / call control circuit is configured by AM18, the call from the intercom subunit 4 is discriminated, and the intercom subunit 4 and the surveillance camera 5 that have called are supplied with power from the drive power supply circuit described above. It supplies and sends the visitor video and the monitor video to the monitor TV 3, and controls the transmission and reception of the audio signal for a call between them.

Further, the CPU 10 and the graphics generation circuit 14 constitute an image synthesizing circuit, and the visitor image transmitted from the intercom subunit 4 that receives the call is used as the main screen and the surveillance camera 5 transmits the surveillance image. A composite image with a video as a sub screen is formed.

Further, the CPU 10 and the video converter 1
5, the video modulation circuit 16 and a speaker (not shown) constitute a monitoring control circuit, and sends an alarm signal and an alarm image, which are specified in advance corresponding to the type of sensor, to the monitor television 3.

Here, the video synthesizing circuit responds to a call from a plurality of intercom sub-units 4, so that the visitor video sent from the camera of the intercom sub-unit which first makes a call is used as the main screen and is delayed. It also forms a composite video image with a sub-screen that is the video of the visitor sent from the camera of the intercom subunit that made the call.

Further, since the video synthesizing circuit corresponds to the response on the monitor television 3 to the call from the plurality of intercom slaves 4, until the monitor television 3 responds, the doorphone which first makes the call. A composite video image is formed on the monitor television while the guest image sent from the camera of the child device 4 is used as the main screen, and the visitor image sent from the camera of the doorphone child device that is called later is used as the sub screen. After responding, the visitor image sent from the intercom subunit 4 that is the other party of the call is formed as a main screen, and the visitor image transmitted from the other intercom subunit 4 is formed as a sub-image screen. I have to.

Each function of such a video synthesizing circuit can be executed if the CPU 10 stores software corresponding to each function, and the software to be used for each function can be switched.

One of the monitor televisions 3 has a control unit connection terminal T5 for connecting the control unit 1.

On the other hand, the monitor television 3 has a CPU 30, a video demodulation circuit 31, and a speaker S as shown in FIG.
A voice processing circuit 32 having a P and a microphone MI, a control command I / F circuit 33 for inputting various control commands from the control unit 33, and a liquid crystal monitor 3
4, a touch panel 35, a touch panel controller 36, and a button input section 37 having various operation switches.
And an LED output unit 38 for displaying various LEDs. In addition, H is a hands-free control circuit, which enables a hands-free call with the other party.

Although the above-described video synthesizing process is configured to display a two-screen display for displaying the main screen and the sub-screen, the present invention is not limited to this example, and display with three screens or more screens. The main and sub relationships on these screens may be switched at appropriate times. Moreover, the video displayed on each screen may be a still image.

Here, in the above-described embodiment, the control unit 1 is connected to the monitor television 3, the intercom subunit 4, the surveillance camera 5, the electric lock unit 6, and the security sensors 7 to 10, but FIG. As shown in FIG. 3, the monitor TV 3 ′ includes an intercom subunit 4, a surveillance camera 5, an electric lock unit 6, and a security sensor 7 to.
10 may be connected so that various functions described below can be executed.

As the internal structure of the monitor television 3'for that purpose, the liquid crystal monitor 34, the touch panel 35, the touch panel controller 36, the button input section 37, the LED output section 38, and the hands free are added to the internal structure of the control unit 1 shown in FIG. The control circuit H, the microphone SP, and the speaker SP may be added.

In this way, each of the functions described above can be executed without externally adding the control unit 1 described above, the workability of the system can be improved, and it is extremely convenient.

[0054]

As can be understood from the above description, in the TV intercom system according to the first aspect of the present invention, the video composing circuit of the control unit sends the call from the camera of the intercom subunit that received the call. It is a TV intercom system equipped with a plurality of camera means because it forms a composite image with the visitor video as the main screen and the surveillance video sent from the surveillance camera as the sub-screen, and sends it to the monitor TV for display. Since it is possible to simultaneously check the visitor video imaged by these camera means on one monitor television, it is convenient.

In the television intercom system according to the second aspect, the video synthesizing circuit uses the visitor video sent from the camera of the intercom subunit that first makes a call as the main screen, and makes the call after a delay. A composite video image is created with the visitor video sent from the device's camera as the sub-screen and sent to the monitor TV for display, so a call is received from one of the multiple intercom devices Moreover, it is convenient because it is possible to confirm that a call has been received from another child device with a visitor image.

In the television intercom system according to the third aspect, the effect of the second aspect is exerted, and the visitor image transmitted from the intercom subunit which is the other party of the call is displayed on the main screen and the other intercom subunits. The sent visitor video is formed as a composite video screen with a sub-screen and sent to the monitor TV to be displayed, so that the visitor video in the current call becomes a close-up and you can easily understand who you are talking to. .

In the television intercom system according to claim 4, the effect of claim 3 is exerted, and after responding on the monitor television, only the visitor image sent from the intercom subunit which is the other party of the call is main. Since it is formed as a screen, only the video of the visitor who is currently talking is shown in close-up, and it is easier to understand who is talking.

In the television intercom system according to the fifth aspect, the control unit monitors the operating state of the security sensor, and when a call is made, it is specified in advance with respect to the intercom base unit according to the type of sensor. Since the alarm signal and the alarm image are sent out,
With a monitor television, it is possible to easily confirm which type of abnormality has occurred, and it is possible to immediately deal with each type of abnormality.

In the television intercom system according to the sixth aspect, the control unit decodes the control signal from the monitor television and applies the electric lock unit to output the lock and unlock signals for unlocking. The electric lock unit can be locked and unlocked according to the locking and unlocking operation on the monitor TV, which is convenient.

In the television intercom system according to any one of claims 7 to 12, a monitor camera, a doorphone subunit, a security sensor, and an electric lock unit are connected to the monitor television, and the effect of any one of claims 1 to 6 is obtained. Since it can be exhibited, a system exhibiting the effect of any one of claims 1 to 6 can be constructed with space saving and high workability, which is convenient.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a main configuration of a system of the present invention.

FIG. 2 is a diagram showing an example of a video display mode on a monitor television.

FIG. 3 is a flowchart showing an example of the operation of the system of the present invention.

FIG. 4 is a diagram showing another example of a video display mode on a monitor television.

FIG. 5 is a flowchart showing another example of the operation of the system of the present invention.

FIG. 6 is a diagram showing an example of an internal configuration of a control unit.

FIG. 7 is a diagram showing an example of an internal configuration of a monitor television.

FIG. 8 is a diagram showing another example of the main configuration of the system of the present invention.

[Explanation of symbols]

1 ... Control unit 3 ... Monitor TV 4 ... Doorphone subunit with camera 5 ... Surveillance camera 6 ... Electric lock unit 7, 8, 9, 10 ... Security sensor T1 ... Input terminal T2: Connection terminal for master unit T3: Security sensor connection terminal T4: Electric lock connection terminal

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5C054 AA01 AA05 BA03 CD06 CE15                       CH04 DA08 EH01 FA02 FE02                       FE12 FE18 FE26 HA22                 5C087 AA02 AA03 AA24 AA25 AA37                       AA44 BB03 BB13 BB64 BB74                       DD04 DD05 DD25 DD26 DD36                       EE05 EE16 FF01 FF02 FF04                       FF24 FF25 GG02 GG66 GG67                       GG71                 5K038 AA05 CC06 DD15 DD18 DD23                       FF01 GG02 GG06

Claims (12)

[Claims] 1. A TV intercom system, which is configured by connecting a door intercom subunit with a camera installed outdoors, a monitor TV installed indoors, and a surveillance camera to a control unit. The unit consists of an intercom subunit with a camera, an input terminal for connecting a surveillance camera, a connection terminal for a master unit for connecting the monitor TV, a camera of the intercom subunit, its call circuit, and the monitoring. The drive power circuit for supplying power to the camera and the call from the intercom subunit with the camera are discriminated, and the call intercom subunit with the camera and the surveillance camera are connected from the drive power circuit. Supplying power to send the visitor video and the monitor video to the monitor TV, and control the sending and receiving of audio signals for communication between the two. It is equipped with a video / call control circuit and a video composition circuit for displaying on the monitor TV. In this video composition circuit, the visitor video sent from the camera of the intercom subunit that has been called is used as the main screen, and A television intercom system, characterized in that a composite image is formed by using a monitor video sent from the monitor camera as a sub-screen. 2. A television intercom system, which is configured by connecting a plurality of intercom subunits with cameras installed outdoors and a monitor TV installed indoors to a control unit, wherein the control unit comprises: , An input terminal for connecting the plurality of intercom subunits with a camera, a connection terminal for a master unit for connecting the monitor TV, a camera of the intercom subunit, and a power supply for a call circuit thereof. The drive power supply circuit, the video compositing circuit that composites the visitor images sent from the called intercom subunits, and the intercom subunit with the camera that identifies the call from any of the above intercom subunits with the camera. To the monitor television, and sends the composite video image of the visitor formed by the video synthesis circuit to the monitor television. In addition, it is equipped with a video / call control circuit that controls transmission and reception of a voice signal for a call between the two parties. The video synthesizing circuit is a visitor sent from the camera of the intercom subunit that first called. A television intercom system that uses a video as a main screen and forms a composite video image with a sub-screen that is a visitor video sent from the camera of an intercom subunit that made a delayed call. 3. A TV intercom system, which is configured by connecting a plurality of door intercom subunits with cameras installed outdoors and a monitor TV installed indoors to a control unit, wherein the control unit comprises: , An input terminal for connecting the plurality of intercom subunits with a camera, a connection terminal for a master unit for connecting the monitor TV, a camera of the intercom subunit, and a power supply for a call circuit thereof. The drive power supply circuit, the video compositing circuit that composites the visitor images sent from the called intercom subunits, and the intercom subunit with the camera that identifies the call from any of the above intercom subunits with the camera. , The power supply from the drive power supply circuit is supplied to control the connection between the called intercom sub-unit and the monitor TV, It is provided with a video / call control circuit that sends and receives a composite video image of a visitor formed by a composition circuit and controls transmission and reception of an audio signal for a call between both parties. The video composition circuit responds to the monitor TV. Until that time, the main screen is the visitor image sent from the camera of the intercom slave that made the call first, and the sub-screen is the visitor image sent from the camera of the intercom slave that made the call later. While the composite video image is formed, after responding on the monitor TV, the visitor image sent from the intercom subunit that is the other party of the call is displayed on the main screen, and the visitor image transmitted from the other intercom subunits is displayed. A TV intercom system that is designed to form a composite video screen as a sub screen. 4. The video synthesizing circuit according to claim 3, wherein the main screen is a visitor video transmitted from the camera of the intercom subunit that first makes a call, until the monitor television responds. While forming a composite video image with the sub-screen that is the video of the visitor sent from the camera of the intercom subunit that made the call later, after responding on the monitor TV, it is transmitted from the intercom subunit that is the other party of the call. A TV intercom system that is designed to form only the received visitor video as the main screen. 5. The security unit according to any one of claims 1 to 4, wherein the control unit monitors a security sensor connection terminal for externally connecting a fire sensor, a crime prevention sensor, a room caller, etc., and operating states of these security sensors. Then
When a call is made, a monitor control circuit for sending out an alarm signal and an alarm image, which are specified in advance corresponding to the type of sensor, to the monitor television is further provided. , TV intercom system. 6. The electric lock according to claim 1, wherein the control unit has an electric lock connection terminal for connecting an electric lock unit, and decodes a control signal from the monitor TV to obtain the electric lock. A TV intercom system characterized by outputting a locking and unlocking signal for locking and unlocking the unit. 7. A TV intercom system, which is configured by connecting an intercom subunit with a camera installed outdoors and a surveillance camera to a monitor TV installed indoors, wherein the monitor TV is the above-mentioned. Door-phone intercom with camera, input terminal for connecting surveillance camera, camera of intercom sub-unit, call circuit thereof, drive power supply circuit for supplying power to the surveillance camera, intercom sub-unit with camera From the driving power supply circuit to the intercom subunit with the camera and the surveillance camera that have called, and each captures a video of the visitor. Image that controls the sending and receiving of audio signals for calls between
It is equipped with a call control circuit, a video compositing circuit that composites the visitor video from the intercom slave and the surveillance camera, and this video compositing circuit analyzes the visitor video sent from the camera of the intercom slave that received the call. A television intercom system, characterized by forming a composite image having a main screen and a monitor image sent from the monitor camera as a sub screen. 8. A TV intercom system, which is configured by connecting a door intercom subunit with a camera installed outdoors and a surveillance camera to a monitor TV installed indoors, wherein the monitor TV is the above-mentioned. Door intercom with camera, input terminal for connecting surveillance camera, camera of the intercom slave, call circuit for the intercom, drive power supply circuit for supplying power to the surveillance camera, multiple intercoms called The video synthesis circuit that synthesizes the visitor image sent from the device and the call from one of the intercom slaves are identified, and the power from the drive power supply circuit is supplied to the called intercom slave with camera. In addition to displaying the guest composite image formed by the image synthesizing circuit, it also controls the transmission and reception of voice signals for a call with the called intercom subunit. The video synthesizing circuit has a visitor image sent from the camera of the intercom subunit that first makes a call as the main screen, and the intercom subunit that makes the call after a delay. TV intercom system, which is designed to form a composite video image with a visitor video sent from the camera as a sub screen. 9. A TV intercom system, which is configured by connecting an intercom subunit with a camera installed outdoors and a monitoring camera to a monitor TV installed indoors, wherein the monitor TV is the above-mentioned. Door intercom with camera, input terminal for connecting surveillance camera, camera of the intercom slave, call circuit for the intercom, drive power supply circuit for supplying power to the surveillance camera, multiple intercoms called The video synthesis circuit that synthesizes the visitor image sent from the device and the call from one of the intercom slaves are identified, and the power from the drive power supply circuit is supplied to the called intercom slave with camera. In addition to displaying the guest composite image formed by the image synthesizing circuit, it also controls the transmission and reception of voice signals for a call with the called intercom subunit. The video synthesizing circuit is provided with a video / speech control circuit, and the video synthesizing circuit collects the visitor video transmitted from the camera of the intercom slave that first makes a call until the call of the intercom slave is answered. While forming a composite video image as the main screen and the sub-screen is the visitor video sent from the camera of the intercom subunit that made the call later
After answering the call, the visitor image sent from the intercom subunit that is the other party of the call is formed as the main screen, and the visitor image transmitted from the other intercom subunits is formed as a sub-image screen. I have a TV intercom system. 10. The video image synthesizing circuit according to claim 9, wherein, until the call of the intercom subunit is answered, the visitor image transmitted from the camera of the intercom subunit that first makes a call is displayed on the main screen. And, while forming a composite video image with the sub-screen is the visitor video sent from the camera of the intercom subunit that made the call with a delay,
After answering a call, the TV intercom system is designed to form only the visitor image sent from the intercom subunit, which is the other party of the call, as the main screen. 11. The monitor TV according to claim 7, wherein the monitor television monitors a security sensor connection terminal for externally connecting a fire sensor, a crime prevention sensor, a room caller, etc., and the operating states of these security sensors. Then
When a call is made, a monitor control circuit for sending out an alarm signal and an alarm image, which are specified in advance corresponding to the type of sensor, to the monitor television is further provided. , TV intercom system. 12. The monitor according to any one of claims 7 to 10, wherein the monitor TV has an electric lock connection terminal for connecting an electric lock unit, and the control signal from the monitor TV is decoded to obtain the electric lock. A TV intercom system characterized by outputting a locking and unlocking signal for locking and unlocking the unit.