JPH05207470A - Common entrance camera system - Google Patents

Abstract

PURPOSE:To display a picture by a common entrance camera onto only a television receiver of a visiting house. CONSTITUTION:A signal from a camera 1 is modulated into a high frequency signal whose frequency is not received by a receiver of a house at an RF modulation section 2, mixed in a community receiving line of a television broadcast, etc., in a mixing section 3 and sent to each housing via a distributer 4. A doorphone 5 is operated to call a house via an exchange connection section 6. A discrimination section 7 discriminates the signal to make an interphone 8 available of talking with the doorphone 5 through a control section 13. Moreover, based on the signal from the discrimination 7, a channel conversion section 9 converts the high frequency signal into a frequency receptible by a receiver 10 through the control section 13 and inputs the signal to the receiver 10 and channel data are read from a storage section 11 through the control section 13 and inputted to a remote control section 12, in which a remote control signal such as an infrared ray is generated and sent to the receiver 10 thereby switching the reception channel into a channel with the converted frequency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance camera system installed in a common entrance of an apartment house, and an image from an entrance camera (hereinafter, abbreviated as camera) is a television receiver of a dwelling unit of a visitor (hereinafter, Abbreviated as a receiver) related to what is displayed only on.

[0002]

2. Description of the Related Art Door intercoms and cameras are installed at a common entrance of a collective entrance, etc., a visitor or the like is imaged by a camera according to a call operation of the visitor, and the image is displayed on a receiver of a visited dwelling unit. There is one that allows a call to be made with a visitor through an intercom while watching the screen of the machine. Some of these devices transmit a video signal from a camera by wire and display it on a monitor device in a dwelling unit. In this case, a dedicated signal transmission line and a monitor device for transmitting the video signal are required. Therefore, for example, a video signal is converted to a high frequency signal of an empty channel of television broadcasting, mixed with a signal line for co-listening of television broadcasting, etc., transmitted to each dwelling unit and displayed on the screen of the receiver. There are things I tried to do.

[0003]

However, in this case, even in a dwelling unit other than the visited place, the image of the visitor can be seen by operating the reception channel of the receiver, which is a problem from the viewpoint of privacy protection. Could be.

The present invention has been made in view of the above circumstances, and converts a video signal from a camera into a high frequency signal having a frequency that is not received by a receiver of a dwelling unit and transmits it to each dwelling unit. Then, only in the dwelling unit operated by calling the doorphone, the high-frequency signal is converted into a high-frequency signal having a frequency receivable by the receiver based on the calling signal, input to the receiver, and the visitors or the like are displayed on the screen. It provides the system.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a visitor or the like who makes a call through an intercom of a dwelling unit with an intercom installed in a common entrance and takes an image with a camera installed in the common entrance Which is displayed on a receiver of a dwelling unit, a camera for imaging a visitor or the like and outputting a video signal, and an RF for appropriately modulating the signal from the camera into a high frequency signal of a frequency not received by the receiver of the dwelling unit.
A modulator, a mixer that mixes a high-frequency signal from the RF modulator into a signal line for television broadcasting, a distributor that distributes the signal from the mixer to each dwelling unit, and a caller and a call for the dwelling unit. A common part consisting of an intercom and an exchange connection part that is exchange-connected to a required dwelling unit based on a signal from the intercom, a determination part that determines a calling signal from the exchange connection part, and an intercom that performs a call with the intercom etc. And a channel converter that converts a high-frequency signal from the common unit into a high-frequency signal of a channel that can be received by the receiver of the dwelling unit based on the signal from the determination unit, and a receiver that receives the signal via the channel converter. And a storage unit for storing channel data and the like for switching the reception channel of the receiver to a desired channel, and read from the storage unit by a signal from the determination unit. Provided is a joint entrance camera system including a remote control unit for generating and transmitting a remote control signal based on channel data, and a dwelling unit including the determination unit, intercom, channel conversion unit, storage unit, and control unit for controlling the remote control unit. It is a thing.

[0006]

With the above construction, in the joint entrance camera system according to the present invention, a video signal picked up by a camera such as a joint entrance is modulated into a high frequency signal of a frequency which is not received by the receiver of the dwelling unit, and the television is It is mixed with the common listening line for broadcasting and transmitted to each dwelling unit. Then, if the dwelling unit is called by operating the intercom at the common entrance, the calling signal is discriminated by the dwelling unit, and based on the discrimination, the modulated high frequency signal is converted into a high frequency signal having a frequency receivable by the receiver and the image is received. Enter into the machine. Then, the remote control signal based on the preset channel data is sent to the receiver,
The receiving channel of the receiver is switched to the channel of the converted frequency.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a joint entrance camera system according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of essential parts of an embodiment of a joint entrance camera system according to the present invention. In the figure, A is a common area including a common entrance, and B is a dwelling unit. The common area A 1 is a camera, which images a visitor or the like at the common entrance. Reference numeral 2 denotes an RF modulator, which is a high-frequency signal of a frequency at which the video signal from the camera 1 is not received by the receiver of the dwelling unit, for example, a super high band (about
30 MHz to 470 MHz = a general receiver does not have a function of receiving signals in this frequency band), and modulates to an appropriate frequency. A mixer 3 mixes the high frequency signal from the RF modulator 2 with a signal line for co-listening such as television broadcasting. Reference numeral 4 denotes a distributor, which distributes the signal from the mixing unit 3 to each housing unit B. Reference numeral 5 is an intercom, which is used for inputting the number of the dwelling unit to be visited and making a call with the dwelling unit. Reference numeral 6 denotes an exchange connection portion for exchange-connecting an input / output signal with the intercom 5 to a required dwelling unit portion B.

The housing unit B (plurality) 7 is a storage unit, and 7 is a discriminating unit for discriminating a calling signal or the like from the exchange connection unit 6. 8
Is an intercom, which enables communication with the intercom 5 based on a signal from the determination unit 8. 9 is a channel converter,
The high frequency signal modulated by the RF modulator 2 from the distributor 4 based on the signal from the discriminator 7 is converted into, for example, a high frequency signal of an empty channel of television broadcasting. A receiver 10 receives a high-frequency signal via the channel converter 9. A storage unit 11 stores the channel data and the like converted by the channel conversion unit 9. Reference numeral 12 denotes a remote control unit that transmits a remote control (hereinafter abbreviated as remote control) signal based on the data read from the storage unit 10.
A control unit 13 controls each part of the dwelling unit B.

Next, the operation of the joint entrance camera system according to the present invention will be described. A visitor or the like of the common entrance calls the dwelling unit of the visited place, and thus inputs the dwelling unit number or the like by operating the number keys of the intercom 5. The signal from the intercom 5 is input to the exchange connection unit 6. The exchange connection unit 6 exchange-connects the communication line to the corresponding dwelling unit B and sends out a calling signal. On the other hand, camera 1
Captures a visitor or the like at the common entrance and outputs a video signal. A video signal from the camera 1 is input to the RF modulator 2 and is modulated into, for example, a high frequency signal having an appropriate frequency in the super high band. The high frequency signal from the RF modulator 2 is input to the mixer 3, mixed with a signal line for co-listening such as television broadcasting, and distributed to each dwelling unit B via the distributor 4.

The call signal from the exchange connection unit 6 is
It is input to the discrimination unit 7 through the control unit 13 of the dwelling unit B and is discriminated. Then, a ringing tone is output from the intercom 8 based on the signal from the discriminating unit 7, and if the intercom 8 is off-hooked, a call can be made with the intercom 5. The signal from the discrimination unit 7 is input to the channel conversion unit 9 via the control unit 13, and the high frequency signal modulated by the RF modulation unit 2 is converted into, for example, a high frequency signal of a vacant channel of television broadcasting. Activate the circuit. The signal from the channel converter 9 is input to the receiver 10 and received.
In the channel conversion unit 9, signals other than the frequencies of the empty channels (television broadcasting signals, etc.) bypass the side paths, and the receiver 10 can always receive television broadcasting and the like. Channel data is read from the storage unit 11 via the control unit 13 based on the signal from the discriminating unit 7 and input to the remote control unit 12 to generate, for example, an infrared remote control signal, and the reception channel of the receiver 10 is channeled. The conversion section 9 switches to the empty channel converted. As a result, it is possible to talk on the intercom 8 while watching the visitors and the like at the common entrance on the screen of the receiver 10. Based on a signal from the discriminating unit 7, a receiver operation detecting unit (not shown) detects whether or not the receiver 10 is in operation, and when not in operation, first turns on the power of the receiver 10 A signal may be transmitted, and thereafter, a remote control signal for channel switching may be transmitted.

The remote control unit 12 sends out the previously sent channel switching signal by the on-hook of the intercom 8 or a required channel return operation, and the receiver 10
Switch the receiving channel of. In the above, RF
The high frequency signal from the modulator 2 is converted into a signal of an empty channel having a frequency that can be received by the receiver 10 by the channel converter 9, but the high frequency signal from the RF modulator 2 is a baseband video signal. It is also possible to demodulate and connect to input to the video input terminal of the image receiver 10, and switch the input of the image receiver 10 to the image input by the remote controller 12. Further, the camera 1, the RF modulator 2 and the like may be started by a call operation of the doorphone 5.

[0012]

As described above, in the joint entrance camera system according to the present invention, the signal from the camera installed at the common entrance is transmitted as a high frequency signal of a frequency that is not directly received by the receiver of each dwelling unit. , Since it is converted into a frequency that can be received by the receiver only in the dwelling unit where it is called, there is no fear of invasion of privacy. Moreover, since the signal from the camera is transmitted to each dwelling unit through the co-listening signal line of the existing television broadcasting,
The cost can be reduced compared to the case where a dedicated signal transmission line and a dedicated monitor device are installed.

[Brief description of drawings]

FIG. 1 is a block diagram of essential parts of an embodiment of a joint entrance camera system according to the present invention.

[Explanation of symbols]

 A Common area B Housing unit 1 Entrance camera 2 RF modulator 3 Mixer 4 Distributor 5 Doorphone 6 Exchange connection 7 Discriminator 8 Intercom 9 Channel converter 10 Television receiver 11 Memory 12 Remote control 13 Control

Claims (1)

[Claims] [Claim 1] A call is made through an intercom of a dwelling unit with a doorphone installed at a common entrance, etc., and an image of a visitor, etc. captured by an entrance camera installed at the common entrance is displayed on a television receiver, etc. of the dwelling unit. In this case, an entrance camera that picks up an image of a visitor or the like and outputs a video signal, an RF modulator that appropriately modulates a signal from the entrance camera into a high frequency signal having a frequency that is not received by a television receiver of a dwelling unit, and R
A mixing unit that mixes a high-frequency signal from the F modulator into a signal line for television broadcasting, a distributor that distributes the signal from the mixing unit to each dwelling unit, a doorphone for calling and talking on the dwelling unit, and an intercom. Based on the signal from the shared connection part, which is connected to the required dwelling unit for replacement connection, a determination part for determining a calling signal from the exchange connection part, an intercom for making a call with the intercom etc., and the determination Channel converter that converts a high-frequency signal from the common unit into a high-frequency signal of a channel that can be received by a television receiver of a dwelling unit based on a signal from the unit, and a television receiver that receives the signal through the channel converter. A storage unit for storing channel data etc. for switching the receiving channel of the television receiver to a required channel, and a signal from the discriminating unit. The remote control unit generates a remote control signal based on the channel data read from the storage unit and sends the remote control signal, and a housing unit including the determination unit, the intercom, the channel conversion unit, the storage unit, and the control unit controlling the remote control unit. A joint entrance camera system.