JPH0486191A - Television doorphone system - Google Patents

Abstract

PURPOSE:To simplify the operation and to constitute a system of a master machine where the number of mounted buttons, lamps, etc., for a slave machine is not fixed by simultaneously displaying video signals from plural slave machines on the television monitor of the master machine in a room and simplifying the control logic of plural video signal systems and audio signal systems. CONSTITUTION:When a speech path between a doorphone master machine 16 and a television doorphone slave machine 31 with a camera is completed and a call button 36c of a slave machine 34 is depressed at the time of monitoring the video signal of a television camera 32 on a television monitor 14, the video signal separated by an audio/video signal separating circuit 6 is sent to a video signal composing circuit 8 and is composed with the video signal from a separating circuit 5, which is monitored at present, by picture in picture, and the result is sent to the television monitor 14. The speech path is not changed. When a television monitor button 15 is depressed, the speech path is switched between slave machines 31 and 34, and speech to the slave machine 31 is held.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a video door intercom system, and more particularly to a video door intercom system provided with a plurality of camera-equipped door intercom handsets.

[Prior Art] As shown in FIG.
9a, microphones 33b, 36b, 39b and call button 33c
, 36c, and 39c, respectively, a switching unit 21, a television monitor unit 13, and a telephone unit 27.

The camera-equipped video door intercom handsets 31, 34, and 37 each have a terminal 21 of a switching unit 21 installed on the indoor side.
a, 21 b, 21 c and cables CBL, CB
Connected by L2 and CBL3, terminal 2 of switching unit 21
1a, 21b, and 21c are fixed contacts P1, P2, and P of the video signal changeover switch 22 that operates under the control of the switching CPU 26.
2 and the incoming side of the call and call blocks 23, 24, and 25.

Furthermore, the sliding contact P4 of the video signal changeover switch 22 is terminal 2.
Connected to 1d. Further calls, call plots 23.24
．． The output side of 25 is terminals 21e and 21f.

Connected to 21g.

The television monitor unit 13 has a television monitor 14 and a television monitor button 15, and the video signal output from the terminal 21d of the switching unit 21 is monitored on the television monitor 14 via the terminal 13a of the television monitor unit 13. The television monitor button 15 is connected to the switching CPU 26 via the terminal 13b1 and the terminal 21h of the switching unit 21.

The telephone unit 27 has a speech network 28, a calling circuit 29b1 with a built-in speaker and a handset 29a1,
It consists of control interfaces 30a, 30b, 30c and an operation display section 30d with buttons 1, K2, K3 and lamps L, , L2, Ll, and a terminal 21 of the switching unit 21.
e, 21f, and 21g are terminals 27a of the telephone unit 27
, 27b and 27c, respectively, and the switching unit 2
1 terminals 21e, 21f, and 21g are connected to the telephone unit 27's call/control interface 30a130.
The data is transmitted and received by the handset 29a via the terminals b and 30c.

The switching unit 21 is a video intercom slave unit 31 with a camera.
The operation of the call buttons 33C, 36C% 39C of 34.37 is detected by the call/talk block 23.24.25 to which the terminals 21a, 21b, 21c are connected, and the call buttons 33c,
Switch CPU when 36 c, 39 c is pressed
Notify 26.

Switching CPU 26 calls, call block 23.24.25
controls the calling circuit 29b and the operation display section 30d of the telephone unit 27, and when the calling circuit 29b operates, a calling signal is sent from the speaker built in the calling circuit 29b, and the lamps L3, L2, and the operation display section 30d are activated. L3
lights up.

The speech network 28 has off-hook and on-hook functions, and the off-hook, on-hook and operation display section 30
Pressing 7, K2, and K3 on the d button calls and controls the interfaces 30a and 30b.

30c1 terminals 27a, 27b, 27c, switching unit 2
The operation information of buttons 3, K7, and K3 is sent to the call/talk block 23, 24, and 25 via the terminals 21e, 21f, and 21g of 1.

In the video intercom system having the above configuration, when the call button 33c is pressed on the video intercom slave unit 31 with a camera, a call is made, and the call block 33 detects the pressing of the call button 33c and notifies the switching CPU 26. This causes the switching CPU 26 to switch to the switching unit 2.
Since the video signal changeover switch 22 of the switching unit 21 is controlled, the fixed contact P and the sliding contact P4 of the video signal changeover switch 22 of the switching unit 21 are closed, and the video signal is sent to the TV monitor unit 13 via the sliding contact P4. is sent to the television monitor 14 of At the same time, the switching CPU 26 sends out a ringing tone from the speaker built in the calling circuit 29b via the call control interface 30a, and also sends a ringing tone to the operation display section 30.
Turn on the lamp L1 of d.

When the handset 29a is off-hook and the button 1 is pressed, a communication path is formed between the off-hook handset 29a and the speaker 33a1 microphone 33b of the camera-equipped video intercom slave unit 31. The video signal of the visitor captured by the TV camera 32 of the camera-equipped video door intercom slave unit 31 is monitored on the TV monitor 14 of the TV monitor unit 13, and then the speaker 33a, the microphone 33b, and the handset 29a are used to talk to the visitor. When there is another video door intercom with camera 3
When the call button 36c of 4 is pressed, a call is made and the call block 2
4 is activated. When the calling/talking block 24 is activated, the switching CPU 26 controls the operation display section 30d via the call control interface 30b.
Turn on the lamp L2.

In this state, the video signal of the visitor captured by the television camera 32 of the camera-equipped video intercom slave 31 continues to be monitored by the television monitor 14 of the television monitor unit 13. Here, when the television monitor button 15 is pressed, the switching CPU 26 knows that the television monitor button 15 has been operated, and closes the fixed contact P2 and the sliding contact P4 of the video signal changeover switch 22. When the fixed contact P2 and the sliding contact P4 of the video signal changeover switch 22 are closed, the video signal of the visitor captured by the TV camera 35 of the camera-equipped video intercom slave unit 34 is displayed on the TV monitor 14 of the TV monitor unit 13. Can be monitored. However, since the communication path is through the camera-equipped video door intercom handset 31, the call block 23, and the call control interface 30a, it is not possible to talk to the camera-equipped video door intercom handset 34. When it is desired to make a call with the camera-equipped video door intercom slave unit 34, the handset 29a is once put on-hook, and the communication path with the camera-equipped door intercom slave unit 31 currently in use is released.

After the call path with the camera-equipped door intercom handset 31 is canceled, go off-hook again, and press the button to switch to C.
Under the control of the PU 26, a call path is formed between the call block 24 and the call control interface 30b. call,
Once a call path is formed between the call block 24 and the call control interface 30b, a call path is formed between the call block 24 and the camera-equipped door intercom handset 34 that presses the call button 36c later.

When the TV monitor button 15 is pressed in the standby state, the fixed contacts P and SP of the video signal changeover switch 22 of the changeover unit 21 are pressed.
,, Since P3 and sliding contact P4 are closed in sequence, the TV camera 3 of the video door intercom handset with camera 31, 34, 37
The video signals captured at 2.35.38 can be sequentially monitored on the television monitor 14 of the television monitor unit 13.

When the handset 29a of the telephone unit 27 is off-hook and the buttons 1, K2, and K3 on the operation display section 30d are pressed, the switching unit 21 calls, and the camera-equipped door intercom handset 31.34 is called via the call block 23.24.25. .37 speakers 33a, 36a, 39b and microphones 33b, 36b
, 39b and the handset 29a.

[Problem to be solved by the invention] In the video door intercom system having the above configuration, the switching CPU 2
In the telephone unit 27, 1 and K are displayed on the off-hook and on-hook buttons of the handset 29a and on the operation display section 30d.
2. Press K3, turn on lamps L0, L2, L8, press TV monitor button 15 on TV monitor unit 13,
Call button 33 on doorphone handset with camera 31, 34, 37
c, 36c.

Information of mutually different categories such as the order in which buttons 39c are pressed is input and output, and the video signal changeover switch 2 of the changeover unit 21
2. It is necessary to control the call/talk blocks 23, 24, and 25, and the lamps L3, L2, and L3 of the operation display section 30d. For this reason, there are drawbacks such as complicated operations for multiple calls from multiple camera-equipped door intercom handsets.

In addition, the buttons accommodated in the telephone unit 27 include 1, K2,
Since the number of installed K3, lamps L1, L2, and L3 is fixed, there is a drawback that a versatile door intercom base unit whose number of installed units is not fixed or a telephone with a door intercom base function connected to a public line cannot be used.

[Object of the Invention] The present invention has been made in view of the above-mentioned difficulties. When a plurality of video signals are sent from a plurality of camera-equipped door intercom handsets to a TV monitor of an indoor base unit, the plurality of video signals are transmitted on the TV monitor. By simplifying the control logic of multiple video signal systems and audio signal systems, it is easy to operate, and the number of buttons, lamps, etc. installed on the camera-equipped door intercom slave unit is not fixed. The purpose of the present invention is to provide a video door intercom system in which a system can be constructed using a telephone with a door intercom base function connected to a line.

[Means for Solving the Problems] In order to achieve the above object, the video door intercom system according to the present invention includes an indoor base unit having a TV monitor, a video signal capturing an image of a visitor to the indoor base unit, and an audio signal. In a video door intercom system that includes a plurality of camera-equipped door intercom handsets that transmit and receive video signals, video and audio signals are transmitted and received between one of the plural camera-equipped door intercom handsets and the indoor main unit, and the television monitor receives and receives the video signals. When the first video signal is being broadcast, other video signals captured by other door intercom handsets with cameras are sent to the indoor base unit as the second video signal, and the TV monitor This is a method in which the first and second video signals are broadcast simultaneously.

[Embodiment] Hereinafter, an embodiment of the video door intercom system according to the present invention will be described in detail with reference to FIG.

Components that are the same in FIG. 1 and FIG. 2 are designated by the same reference numerals, so their explanation will be omitted.

As shown in FIG. 1, the video door intercom system according to the present invention includes a television camera 32, 35, 38, a speaker 33a,
36 a, 39 a, microphone 33b, 33b, 39a
It is composed of camera-equipped intercom handsets 31, 34, and 37 equipped with call buttons 33c, 36c, and 39c, respectively, an audio/video signal processing circuit 1, a television monitor unit 13, and an intercom main unit 16.

The video door intercom handsets 31, 34, and 37 with cameras are installed on the indoor side, and the audio/video signal processing circuit 1
terminals 1a, 1b, IC and cables CBL1, CBL2
, connected by CBL3. The audio/video signal processing circuit 1 includes a video door intercom handset interface 2.3.4, an audio/video signal separation circuit 5.6.7, and an audio/video CPUI 2.
video signal organization circuit 8, call path switch 9, door phone main unit interface 10, TV monitor interface 11, call detection, ring tone output, call path switching, incoming call notification tone, hold, call back, etc. Audio-visual CP with a built-in call processing program that executes processing
It consists of a UI 2, and terminals 1a, lb, and lc are each connected to the input side of a video intercom slave interface 2.3.4. In addition, the control side is connected to the audio/video CPU 12 and includes a video intercom slave interface 2.3.
The output side of 4 is connected to the input side of the audio/video signal separation circuit 5.6.7, the output side of the video signal is connected to the input side of the video signal organization circuit 8, and the output side of the audio signal is connected to the input side of the audio/video signal separation circuit 5.6.7. Each is connected to the input side. Next, the output side of the video signal organizing circuit 8 is connected to the input side of the television monitor interface 11, and the output side of the call path switch 9 is connected to the input side of the door phone main unit interface 10, respectively. Further, the output side of the television monitor interface 11 is connected to the terminal 1d, and the output side of the door phone main unit interface 10 is connected to the terminal 1e.

The TV monitor unit 13 that constitutes the video circuit of the indoor base unit has a TV monitor 14 and a TV monitor button 15.
The terminal 1d of the audio/video signal processing circuit 1 is connected to the terminal 13a of the TV monitor unit 13, and the TV monitor button 1 is connected to the terminal 13a of the TV monitor unit 13.
5 is the terminal 13b and the terminal 1 of the audio/video signal processing circuit 1
It is connected to the audio/video CPU 2 via f.

The door phone base unit 16, which constitutes the audio system circuit of the indoor base unit, is composed of a speech network 17 having off-hook and on-hook functions, a handset 18, and a speaker 18a used as a ringer and a speakerphone. It is connected to the terminal 1e of the signal circuit 1.

[Operation of the invention] When the call button 33c of the camera-equipped video door intercom handset 31 is pressed in the video door intercom system having the above configuration, the audio/video CP
A call processing program built into the UI2 is executed. When the call processing program is executed, the audio signal and video signal input to the video door intercom handset interface 2 corresponding to the video door intercom handset with camera 31 are separated by the audio/video signal separation circuit 5, and the video signal is separated from the video signal. Formation circuit 8
The audio signal is sent to the communication path switch 9. The corresponding input and output sides of the call path switch 9 are the audio/video CPU 12
When switching is performed by executing a call processing program built into the door intercom base unit 16, a communication path between the door intercom base unit 16 and the video door intercom slave unit 31 with camera is completed, and a ring tone is sent from the speaker 18a of the door intercom base unit 16. . Door phone main unit 1
6 off-hook, a telephone conversation can be made using the handset 18 and the speaker 33a and microphone 33b of the camera-equipped video intercom slave unit 31, and the video signal captured by the television camera 32 can be monitored on the television monitor 14 of the television monitor unit 13. In this state, video door phone handset with camera 3
When the call button 36c of 4 is pressed, the video intercom slave interface 3 operates under the control of the audio/video CPUI 2, and the video signal separated by the audio/video signal separation circuit 6 is sent to the video signal organization circuit 8. . The video signal organizing circuit 8 organizes the video signal outputted from the audio/video signal separating circuit 5 currently being monitored and the video signal separated by the audio/video signal separating circuit 6 as a picture-in-picture, and if necessary, A child device identification number is attached to the main screen and the child screen, and the images are sent to the television monitor 14 of the television monitor unit 14.

On the other hand, since the corresponding input side communication path of the audio/video signal separation circuit 5 of the communication path switch 9 is not changed, the communication continues.

Here, when the TV monitor button 15 is pressed, the video signal organizing circuit 8 uses the video signal output from the audio/video signal separation circuit 6 as the main screen, and the video signal output from the audio/video signal separation circuit 5 as the sub screen. and sends it to the television monitor 14 of the television monitor unit 13.

The call path is switched to and from the camera-equipped video door intercom handset 34, and the call with the camera-equipped door intercom handset 31 is put on hold. When the TV monitor button 15 is pressed again, the main screen, sub-screen, and call path return to their initial states, and the call from the camera-equipped video intercom slave unit 34 is put on hold. here,
When the handset 18 is turned on-hook, all circuits are restored and the door intercom main unit 16 goes into a standby state. When you operate the TV monitor button 15 in standby mode, the video door phone handset with camera 3
The video signals of 1, . . . can be monitored by the television camera 14, and the audio signals can be listened to by the speaker 18a.

[Effects of the Invention] The video door intercom system according to the present invention includes an indoor base unit having a TV monitor, and a plurality of camera-equipped door intercom slave units that transmit a video signal capturing an image of a visitor to the indoor base unit and transmit and receive audio signals. In a video door intercom system equipped with a camera, when a video signal and an audio signal are transmitted and received between one of the plurality of camera-equipped door intercom handsets and the indoor base unit, and the television monitor is broadcasting the video signal as the first video signal. , when other video signals captured by other doorbell units with cameras are sent to the indoor base unit as second video signals, the TV monitor simultaneously displays the first and second video signals. Because it is a broadcasting method, it is easy to operate, and the number of buttons, lamps, etc. mounted on the camera-equipped door intercom handset is not fixed, and a system can be constructed using a door intercom base unit or a telephone with a door intercom base function connected to a public phone circuit. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the video door intercom system according to the present invention, and FIG. 2 is a block diagram of a conventional video door intercom system. 1...Audio/video signal processing circuit 13...TV monitor unit (indoor base unit) 16...Door phone base unit (indoor base unit) 31.34.35... Video door intercom with camera

Claims (1)

[Claims] In a video door intercom system comprising an indoor base unit having a television monitor, and a plurality of camera-equipped door intercom slave units that transmit a video signal capturing an image of a visitor to the indoor base unit and transmit and receive an audio signal, the plurality of cameras When the video signal and the audio signal are transmitted and received between one of the door intercom slave units and the indoor master unit, and the television monitor is broadcasting the video signal as a first video signal, the other of the plurality of When another video signal obtained by capturing an image of another visitor using a camera-equipped door intercom slave unit is sent as a second video signal to the indoor base unit, the television monitor broadcasts the first and second video signals simultaneously. The video door phone system is characterized by: