JPH02206295A - Interphone device - Google Patents

Abstract

PURPOSE:To eliminate the signal line of a push button by converting a signal from the push button of an interphone device into a high frequency signal in a UHF band, mixing it to the antenna line of a television, and transmitting it. CONSTITUTION:When the push button of a bell of an interphone device is operated, a push button switch is operated, and the signal is impressed on a code signal generating part 7 and an oscillating part 8. The code signal generating part 7 generates the set code signal which identifies the interphone device. The oscillating part 8 oscillates the necessary high frequency signal in the UHF band of a television broadcast, a converting part 9 converts it by a code signal from the code signal generating part 7, executes a processing such as amplification as needed, and a mixing part 2 mixes the signal with the other TV signal. Further a receiving part 10 selectively receives the high frequency signal in the UHF band of the oscillating part 8, when it receives the normal code signal, it outputs a control signal to a channel control signal generating part 12, a television picture receiver 3 automatically switches a channel to the indicated idle channel, the TV camera of the interphone device picks up a subject, and a video is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an intercom device equipped with a monitoring television camera, etc., and relates to transmission of a control signal by operating a push button or the like.

``Prior Art'' In recent years, CCD (charge-coupled devices) have become available at low cost and can be easily used in television cameras, etc., and intercom devices equipped with television cameras have been developed to facilitate visitor communication. It is used for confirmation etc. In these conventional intercom devices, as shown in FIG. The signal is converted into a signal, transmitted via a coaxial line, mixed with signals from the UHF antenna section 1° and VHF antenna section 1'' in the mixing section 2, and connected to the antenna terminal of the television receiver 3.
It is configured to receive each signal. On the other hand, the signal from the push button 6 of the intercom device is wired, for example, with a two-core wire, separately from the video signal, and is input to the channel control signal generation section 12, and in response to the operation of the switch of the push button 6, the signal is input to the channel control signal generation section 12. 12 is configured to output a control signal for changing the channel of the television receiver to the vacant channel, and to project the video signal from the television camera 4 through the UHF vacant channel of the television receiver. . In this way, in conventional intercom devices, the video signal from the television camera uses the antenna line for receiving the television image, so it can be wired relatively easily, but the signal line for the push button of the intercom device It is necessary to wire the antenna line separately from the antenna line, which requires construction work.Therefore, improvements have been desired.

"Problem II to be Solved by the Invention" The present invention solves the above-mentioned problems such as the increase in work caused by wiring the push button signal line of the intercom device and the deterioration of the aesthetics of the room etc. due to the wiring. The purpose of this system is to convert the signal from the push button of an intercom device into a high-frequency signal in the UHF band, mix it with the television antenna line, and transmit it, thereby eliminating the push button signal line.

[Means for Solving the Problems] The present invention was made in view of the conventional problems, and includes a switch section that outputs a signal in response to an operation, and a switch section that is activated by the signal from the switch section and generates a predetermined code signal. an oscillation section that generates a high frequency signal in response to the signal; a modulation section that modulates the high frequency signal from the oscillation section with a code signal from the code signal generation section and outputs the modulated signal;
A mixing section that mixes the modulated high frequency signal with another high frequency signal, a receiving section that receives the signal transmitted from the mixing section, and a code signal identification section that identifies and outputs a code signal from the signal from the receiving section. , a channel control signal generation section that outputs a signal for channel control using the signal from the code signal identification section; an antenna input section is connected to the mixing section; the channel is controlled using the signal from the channel control signal generation section; The present invention provides an intercom device configured with a television receiver.

"Operation J" As configured as above, in the intercom device according to the present invention, when there is a visitor and the push button of the intercom device is operated, the switch is closed, and the on signal of the switch is transmitted in the band of the UHF channel of television broadcasting. The signal is converted into a modulated Sareta frequency signal using the code signal within, and is mixed into the television antenna line and transmitted to the television receiver via the antenna line.At the same time, the television camera of the intercom device is activated and an image is taken. The video signal is U
The signal is converted into one of the available HF channels and mixed into the antenna line for transmission. The transmitted high-frequency signal is received by a receiving section built into the television receiver or provided close to the television receiver, and it is determined based on the code signal whether the signal is from a push button of an intercom device. If the signal is a required signal, a channel control signal is output, the channel of the television receiver is automatically switched to the vacant channel, and the image from the television camera is displayed via the television receiver.

``Example'' Hereinafter, an intercom device according to the present invention will be described in detail based on the drawings. FIG. 1 is a block diagram of a main part of one embodiment of an intercom device according to the present invention, and FIG. 2 is a block diagram of a main part of another embodiment of the same intercom device. In the figure, 1'' is a UHF antenna section, 1'' is a VHF antenna section, and 2 is a mixing section that mixes the signals from the antenna section. 3 is a television receiver, and the signal from the mixing section 2 is A line (such as a coaxial line) is connected to the antenna terminal, and the configuration is configured to receive the signal. 4 is a television camera, which is placed at the entrance, etc., and the captured video signal is transmitted to an empty channel in the IJHF band of television broadcasting. Convert to one UH
Converted via the F converter 5, mixed in the mixer 2,
It is transmitted to the television receiver 3. Reference numeral 6 denotes a push button of the intercom device, which is operated by a visitor or the like, and the operation signal causes a code signal generator 7 to generate a code signal for identifying the intercom device. 8 is an oscillation unit that oscillates a predetermined high frequency signal in the U) IF band. A modulation section 9 modulates the high frequency signal of the oscillation section 8 with a code signal from the code signal generation section 7 using a known modulation technique, and the mixing section 2 mixes the signals and transmits them via an antenna line. 10 is the receiving section,
Among the signals transmitted from the mixing section 2, the high frequency signal oscillated by the oscillation section 8 is selectively received and sent to the code signal identification section 1 to determine whether it is a code signal generated by the code signal generation section 7 or not. identify. In this case, code signal identification section 1
1 may be provided with a memory circuit for storing the code signal generated by the code signal generator 7, and the identification may be made based on the code signal stored in this memory circuit. When the code signal identification unit 11 identifies the code signal and determines that it is a regular code signal, the channel control signal generation unit 12 outputs a channel change control signal, and the television receiver 3 changes the channel to the UHF set above. The system automatically switches to a vacant channel and displays the image captured by the intercom device's television camera. In addition, if there are multiple intercom devices in each location, each intercom device's push port 6.・
・The signal 6 passes through the exchange unit 13 and has an individual code signal given to each intercom device in the code signal generating unit 7, and generates and modulates a code signal corresponding to the push button of the intercom device that is operated. A UHF band high frequency signal modulated by the code signal is generated through the section 9.

The receiving unit 10 receives this signal, and the code signal identifying unit 1
1, and if it is a regular signal, it outputs a control signal for changing the channel to a vacant channel in the UHF band, and changes the channel of the television receiver 3 via the channel control signal generating section 12. If you do not want to automatically display the image taken by the television camera of the intercom device, the code signal identification unit 11 identifies the code signal and sends a message to the intercom device, such as that there is a visitor. In the character generation unit 14, for example, "Visitor at the back entrance"
Messages such as the following may be displayed on the television receiver via the superimpose section I5. In the character generating section 14, character data such as the installation location of each intercom device may be stored in a memory circuit, and the data may be read out and converted into message data by inputting a code signal.

Next, the operation of the intercom device according to the present invention will be explained. When a visitor comes and presses the push button of the doorbell of the intercom device, the switch of the push button is activated and a signal is applied to the code signal generating section 7 and the oscillating section 8. Code signal generator 7
generates a code signal with settings that identify the intercom device. On the other hand, the oscillator 8 oscillates a required high frequency signal in the LJHF band of television broadcasting, which is modulated by the code signal from the code signal generator 7 in the modulator 9, and subjected to processing such as amplification as necessary. It is mixed with other television signals at step 2. Separately, in response to the operation of the push button, the television camera 4 starts operating, and the UHF conversion unit 5 converts the signal into an empty channel signal set in the UHF band of television broadcasting, and the signal is sent to the mixing unit 2. Then, the video signals are mixed in the same manner as above.

The signal transmitted through the mixing section 2 is sent to the television receiver 3.
is input to the antenna terminal section of the On the other hand, the receiving section 10 selectively receives the UHF band high frequency signal from the oscillating section 8, the code signal identifying section 11 identifies the code signal, and when a regular code signal is received, the channel control signal generating section 1
2, and the channel control signal generator 12 outputs a control signal to the television receiver by the UHF converter 5.
It outputs a channel switching signal to an empty channel converted to a standard television signal, and outputs a channel switching signal to the vacant channel,
automatically switches the channel to the specified vacant channel and displays the video captured by the intercom device's television camera.

In addition, if multiple intercom devices are used in each location, press button 6 of each intercom device. ...The 6H signal line is connected as appropriate via the exchange section 13, and the code signal generation section 7
Outputs a code signal for the setting of the push button operated in . This code signal is identified by the code signal identification unit 11, which specifies the location of the pressed button via the character generation unit 14, and generates a message such as ``We are a customer at the back door.''
The image is displayed at an appropriate location on the screen of the television receiver 3 via the superimpose section 15. In these cases, in response to the push button operation, the channel may be automatically switched to display the image from the television camera, and text indicating which intercom device is operating may be displayed on the screen. .

In addition, in the above explanation, various actions were performed in response to the operation of the push button of the intercom device, but for example, in the case where a television camera is operated in response to an external control signal and a video is projected. In this case, the same operation as described above can be performed by replacing the control signal to the television camera with a signal from the operation of the push button.

"Effects of the Invention" As explained above, the intercom device according to the present invention eliminates the need for the signal line for the push button of the intercom, which conventionally required wiring, and it is easy to install these intercom devices. And it can be done easily. Further, when a plurality of intercom devices or surveillance cameras are used, the position of the intercom device or camera that is in operation can be displayed on the screen as appropriate, which has great utility value.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a main part of an embodiment of an intercom device according to the present invention, FIG. 2 is a block diagram of a main part of another embodiment of the same intercom device, and FIG. 3 is a block diagram of a main part of a conventional intercom device. It is. In the diagram! is an antenna section that receives television signals, 2
3 is a mixing section, 3 is a television receiver, 4 is a television camera, 5 is a UHF conversion section, 6 is a push button, 7 is a code signal generation section, 8 is an oscillation section, and 9 is a modulation section. IO is the receiving section, 11
13 is a code signal identification section, 13 is a channel control signal generation section,
14 is a character generation section, and 15 is a superimposition section. Patent applicant: Fujitsu General Ltd. Figure 1 Figure 2

Claims (2)

[Claims] (1) A switch section that outputs a signal in response to an operation, a code signal generation section that is activated by a signal from the switch section and generates a predetermined code signal, and an oscillation section that generates a high frequency signal in response to the signal. a modulating section that modulates the high frequency signal from the oscillating section with a code signal from the code signal generating section and outputs the modulated signal, a mixing section that mixes the modulated high frequency signal with another high frequency signal, and the mixing section. a receiving section that receives a signal transmitted from the receiving section; a code signal identifying section that identifies and outputs a code signal from the signal from the receiving section; and a channel that outputs a signal for channel control using the signal from the code signal identifying section. 1. An intercom device comprising: a control signal generating section; and a television receiver having an antenna input section connected to the mixing section and whose channels are controlled by signals from the channel control signal generating section. (2) A plurality of switch sections that output signals in response to operations, a switch section that connects and separates these switch sections as appropriate, and a predetermined code that is connected to the switch section and corresponds to each switch section. a code signal generation section that generates a signal, an oscillation section that generates a high frequency signal in response to the signal, and a modulation section that modulates the high frequency signal from the oscillation section with the code signal from the code signal generation section and outputs the modulation section. a mixing section that mixes the modulated high frequency signal with another high frequency signal, a receiving section that receives the signal transmitted from the mixing section, and a code signal identifier that identifies and outputs a code signal from the signal from the receiving section. a channel control signal generating section that outputs a signal for channel control based on the signal from the code signal identifying section; a character generating section that generates a predetermined message based on the signal from the code signal identifying section; a superimposing section that synthesizes character signals from the generating section into a television signal; and a television receiver in which an antenna input section is connected to the mixing section and the channel is controlled by the signal from the channel control signal generating section. An intercom device comprising: