JPH01234993A - Interphone system - Google Patents

Abstract

PURPOSE:To speed up response to a visitor by checking the face of the visitor by a TV set specified by a user other than a monitor TV. CONSTITUTION:Respective TV sets 7a, 7b are set up on respectively different positions. The user previously sets up the TV set projecting the image of a visitor at the time of existence of the visitor by operating an operation part 11 on an interphone master machine 8. A video signal from a TV camera 2 provided with an interphone slave machine 1 is converted into a signal appropriate to the set TV set and outputted to the set TV set. Thus, an interphone system capable of projecting the image of a visitor also to a normal required TV set other than the monitor TV 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an intercom system, and more particularly to an intercom system that allows the appearance of visitors to be visually confirmed.

(B) Conventional technology Conventionally, in an intercom system, a TV camera is installed in the intercom slave unit, and a video signal from the TV camera is used to monitor a dedicated monitor T installed in the intercom base unit.
A device that projects an image on a V is known. In this intercom system, as shown in FIG. 7, an intercom handset 30 has a switch 30a, a camera 30b and a speaker
c and a microphone 30d, and the intercom base unit 31 includes a control section 31a, a monitor TV 31b, and a receiver 31c. are connected to each other. In this system, when a visitor operates the switch 30a, a video is displayed on the monitor TV 31b at the same time as the sound of, for example, "Bing Bone".

As an enlarged system of the above system, an apartment door intercom system as shown in FIG. 8 is known. In this system, video and audio signals are transmitted from a camera-equipped entrance device 40 installed at the entrance of an apartment complex to a control device 4.
1, the signal is transmitted to, for example, the room base unit 42 specified by the visitor among the plurality of base units 42, 43, and 44 consisting of a control unit 42a, a monitor TV 42b, and a receiver 42c, and the signal is transmitted to the base unit 42 of the room with a ringing tone. The structure is such that images are projected on the screen.

(c) Problems to be Solved by the Invention However, in the above-mentioned intercom system, the image of the visitor is only displayed on the monitor TV of the intercom base unit, and the visitor cannot be confirmed anywhere other than the location where the intercom base unit is installed. In other words, for example, if the intercom base unit is installed in the kitchen and the user is watching TV in the living room, it is inconvenient because the user must go to the kitchen to check on visitors.

This invention has been made in consideration of the above-mentioned circumstances, and aims to provide an intercom system that can display images of visitors on a normal TV receiver other than a monitor TV.

(d) Means for Solving the Problems Thus, according to the present invention, there are TV receivers each installed at a plurality of different locations, an intercom slave unit equipped with at least one TV camera, and an image from the TV camera. A monitor TV that displays a video corresponding to the signal, a setting means that sets a TV receiver on which the video is to be displayed, and a signal conversion that converts the video signal into a signal compatible with the TV receiver set by the setting means and outputs the signal. An intercom system is provided, comprising: an intercom base unit having means;

(e) Operation The TV receivers are installed at different locations. The signal conversion means converts a video signal from a TV camera provided in the intercom slave unit into a signal compatible with the TV receiver set by the setting means, and outputs the signal to the set TV receiver. Therefore, the video can be checked on a desired TV receiver.

(F) EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following examples.

In Figures 1 to 4, ■ is an intercom handset, which receives audio signals from a TV camera (hereinafter referred to as camera) 2, a microphone 3 for sending calls, a speaker 4 for receiving calls, a visitor switch 5 for calling, and a mark 3. It consists of an amplifier circuit 6 (switch 5 and amplifier circuit 6 are shown in the figure) that amplifies the signal, and is installed at an entrance or the like. Reference numerals 7a and 7b are TV receivers (hereinafter referred to as TV set), which are comprised of control units 71a and 72a for controlling the power on and off of a color TV receiver 71.72 and its color TV receiver fi 71.72; For example, they are installed in several different locations, such as the living room or each individual's room. Reference numeral 8 denotes an intercom base unit, which includes a receiver 9 that receives the audio signal from the intercom slave unit l, a monitor TVIO that receives the video signal from the camera 2, the receiver 9 and the monitor T.
A control device 13 to which the VIO is connected and the operation unit 11 and the video processing circuit 12 are connected, and the video processing circuit 1
The memory 14 is connected to the video processing circuit I2 and serves as an external storage device such as a RAM memory cassette, which can be attached, and stores the video signal processed by the video processing circuit I2. The intercom terminal 1, the intercom base unit 8, and the respective TV sets 72L and 7b are connected by dedicated lines for the respective systems.

As shown in FIG. 2, the intercom handset 1 is supplied with power from the intercom M 8.

As shown in the figure, the intercom base unit 8 includes a visitor signal detection circuit 8a that detects that the visitor switch 5 of the intercom slave unit 1 has been operated, and a voice signal detection circuit 8b that detects that voice is input. and is provided. The visitor signal detection circuit 8a is composed of a comparator 81 for detecting a visitor switch whose output is inverted when the visitor switch 5 of the intercom handset 1 is operated, and a reference voltage source 82.
The audio signal detection circuit 8b includes a low-pass filter 83 and a comparator 84 having a cutoff frequency of, for example, 3.4 KHz. If the audio signal detection circuit 8b is configured as described above, the visitor can use the intercom handset l.
Since the visitor tends to speak closer to the microphone 3 of the visitor, the visitor's face can be clearly shown.

FIG. 3 is a block diagram showing the configuration of the video processing circuit 12. In the figure, 12a is a synchronization signal separation circuit that separates synchronization signals (vertical synchronization signal Vsyn and horizontal synchronization signal Hsyn) from the video signal output from the monitor TVIO.
A/D conversion circuit for only luminance signals (or even color signals)! 2b, and also outputs the separated synchronization signal to the D/A conversion circuit 12c. +2d is an image memory in which the A/D converted luminance signal is written at the timing when the visitor detection signal or voice detection signal is output.
Store the luminance signal. ! A shift register 2e sequentially takes out the digitized luminance signal from the image memory 12d. 12f is a shift amount selection circuit, which is a shift register! 2e
Instructs to change the shift amount. 12g is a serial/parallel conversion circuit that converts the serial data from the shift register 12e into parallel data and outputs it to the D/A conversion circuit 12c. 12
h and 12j are signal selection circuits provided corresponding to the TV sets 7a and 7b, respectively;
+2p, a demodulation circuit 12m, and a modulation circuit +2n, and selects any one of the video signal from the camera 2, the signal from the D/A conversion circuit 12c, and the received TV broadcast signal to set the TV. -Supply to 7a and 7b.

FIG. 4 is a block diagram showing the configuration of the control device 13 of the intercom base unit 8 and the connection between the control device I3 and the TV sets 7a and 7b. In the figure, the control device 13 includes an I10 interface 13b connected to the operation unit 11 equipped with a keyboard for data input, a ROM 13c for storing control programs and data, and a RAM 13d for storing input data. It is composed of CPU13e. Data is input from the operation unit 11 to the I10 interface 13b, and a control signal S for switching 12p is input to the analog switch 12 of the video processing circuit 12.
l, S2 and TV set) 7a.

7b A C? 'i Power supply control signals Spy, Spy (Pow
er on CLT) respectively.

In addition, the voice detection signal and the visitor detection signal output from the intercom @I are input to the I10 interface 13b, and a power supply monitor signal S for monitoring the operation of the relay circuit 71c of each TV set 7a, 7b is input.
m,,Sm,(Power on monite
r) are respectively input.

Next, the operation of this embodiment will be explained with reference to FIG.

The user unit is set in advance by operating the operation unit 11 of the intercom base unit 8 to set the TV station on which the visitor's video is to be displayed when there is a visitor. In other words, the manual data from the operation unit 11 is
The data is input to the CPU 130 via the CPU 130 and stored in the RAM 13cl. Therefore, the I10 interface 13b, the CPU 13e, and the RA:v[I3d constitute a setting means.

In this embodiment where two TV sets 7h and 7b are connected, when a visitor operates the visitor switch 5 (step 100), a visitor detection signal is sent to the I10 interface 1.
3b, the CPU 13e determines whether the set number on the TV on which the image captured by the camera 2 is to be displayed when a visitor is to be displayed has been set (step 101).

If the TV set number is not set, it is determined whether there is a TV set whose power is on based on the power monitor signals S+n+ and Smt input to the CPU 13e via the I10 interface 13b (step 102). Which TV set 7a.

If 7b is also not powered on, the video captured by the camera 2 is displayed on the monitor TVIO of the intercom base unit 8 (step 103). On the other hand, if there is a set on the TV that is powered on, the image captured by camera 2 is reduced and prepared for superimposed display on the TV that is powered on (step 104).
). This preparation begins with the TV set with the Ti source turned on.
) T■ signal (received signal, RF multiplied signal and camera 2)
and the video signal are brought into the same phase by a PLL circuit. The video signal of the camera 2 is A/D converted by the A/D conversion circuit 12b, stored in the image memory 12d, read out by the shift register 12e, and converted to D/A via the serial/parallel conversion circuit 12g. Applicable TV converted by circuit 12C
This becomes the video signal for upper setting. The image captured by the camera 2 is reduced by changing the shift amount of the shift register 12e. For example, if the horizontal resolution in the I horizontal synchronization signal is N, if only the even rows are read out by the shift register 12e, the displayed image will be reduced by 172 in the horizontal direction, and the number M of horizontal synchronization signals per cycle will be M. /
If it is 2, the image will be reduced by 1/2 in the vertical direction. Then, by switching the analog switch 12k at high speed, a corresponding set superimpose display is performed on the TV (step 105).

If the TV set number is set in step 101, it is determined whether the TV set power of that number is already turned on (step 106). If it is on, superimposed display is performed in steps 104 and 105. Conversely, if it is not turned on,
Turn on the set power on the TV with that number (Step 10)
7) The video corresponding to the video signal from camera 2 is displayed on the entire set screen of the TV set with the number (step 108).

The image (camera screen) set and displayed on the TV as described above is stored if the user instructs to store it from the operation unit 11 (step 1109) (step
10). If the user is at home at this time, the name, occupation, contact information, etc. are written as a registration index into the stored video by inputting from the operation unit 11 (step 1II). Note that if the user is out of the house, the date and time at that time are automatically written (step 112).

The video data with registration index etc. is
An audio signal detection circuit 8 is stored in the memory 14 which is an external storage device.
b is transferred at the timing when the audio signal is detected (step 112).

In the above embodiment, the intercom handset, the intercom base unit, and the TV are connected as a set via a dedicated line, but as shown in FIG. They may also be connected in the form of a bus, such as. In this bus-type system, the video signal from the camera 20 is once sent manually to the video processing circuit 22 via the frequency multiplexer 21. The video signal is outputted from the video processing circuit 22 to the pass line 23, and inputted to the monitor TV 24 and each TV set 25, 26 via a BPF (band pass filter) 27. The configuration other than the above is the same as that of the above embodiment.

(g) Effects of the Invention According to this invention, the face of a visitor can be confirmed on the TV monitor specified by the user, so the intercom system can quickly respond to the visitor. can get.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is a circuit diagram showing the configuration of a circuit related to a call between an intercom slave unit and an intercom base unit, and FIG. 3 is a diagram of a video processing circuit. FIG. 4 is a block diagram showing the configuration of the intercom base unit control device and the connection to the TV set, FIG. 5 is a flowchart for explaining the operation of the embodiment, and FIG. FIG. 7 and FIG. 8 are block diagrams of other embodiments configured using the present invention, respectively, and are block diagrams showing the configuration of conventional examples. ! ...Intercom slave unit, 2-...-TV camera, 7a, 7b...TV receiver, 8...Intercom base unit, 10...Monitor TV . 12...Video processing circuit, 13b...I10 interface, 13d
-RAM, 13 e-CPU.

Claims (1)

[Claims] 1. A TV receiver installed at a plurality of different locations, an intercom slave unit equipped with at least one TV camera, and a monitor TV that displays images corresponding to video signals from the TV camera. an intercom parent comprising: a setting means for setting a TV receiver on which the video is to be displayed; and a signal converting means for converting the video signal into a signal compatible with the TV receiver set by the setting means and outputting the signal. An intercom system characterized by comprising a machine and a machine.