JPH0328999A - Security system - Google Patents

Abstract

PURPOSE:To precisely observe a condition in a room and to execute the confirmation of safety without fail by making video telephone call from a destination to the inside of the room, where a user is absent, and adjusting the position and zooming, etc., of a TV camera while observing a picture. CONSTITUTION:Based on command information transmitted through a telephone line 2, a control circuit 5 controls a TV camera 12, video memory 6 and modulation circuit 7. Accordingly, the direction and zooming, etc., of the TV camera 12 are controlled from a call originating source through the telephone line 2 and plural points to be monitored can be monitored from a distant place through the video telephone call. Thus, monitoring ability is improved and high security function can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a security system for monitoring images of a television camera (hereinafter referred to as a TV camera) through a video telephone.

[Prior Art] Security systems for confirming the state of a room to be monitored from a remote location via a telephone line are conventionally known. Furthermore, a security system has been proposed that uses a videophone to check the state of a room to be monitored through images.

[Problems to be Solved by the Invention] However, conventional security systems that monitor targets only by voice cannot monitor visually, so their monitoring capabilities are insufficient. With conventional systems that monitor targets, it is only possible to check the fixed image captured by the TV camera, so it is possible to check the surrounding situation and several specific points of the area shown by the TV camera. It was not possible to do so, and it could not be said that there was sufficient monitoring ability.

The present invention has been made in view of such problems, and includes:
The purpose is to provide a security system with excellent monitoring ability and high security functions.

[Means for Solving the Problems] The security system according to the present invention includes a television camera, a video memory that stores video information from the television camera, and a video signal read from the video memory that is connected to a telephone line. a modulation circuit that modulates the signal to be transmitted via the telephone line; a receiving circuit that receives command information transmitted via the telephone line; and a receiving circuit that modulates the command information transmitted via the telephone line; , and a control circuit that controls a video memory and a modulation circuit.

[Operations] According to the present invention, the control circuit controls the TV camera, video memory, and modulation circuit based on command information transmitted via the telephone line. Therefore, by controlling the direction and zooming of the TV camera from the caller via the telephone line, it becomes possible to monitor a plurality of points to be monitored from a remote location via the videophone. This improves monitoring ability and provides high security functionality.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of a security system according to a first embodiment of the present invention.

This security system is composed of a security controller 1 and a TV camera unit 10.

The security controller 1 is connected to the office side via a telephone line 2, and is also connected to a TV camera unit 10 via a TV camera drive line 13 and a video signal line 14, and is configured as follows. There is. That is, a changeover switch 3 is provided at the connection part of the security controller 1 with the telephone line 2. This changeover switch 3 is
The telephone line 2 is selectively connected to a DTMF receiver 4 side or a modem 7 side, which will be described later. The DTMF receiver 4 receives the DTMF command transmitted via the telephone line 2 and sends it to the telecontroller 5 as numerical information.

The telecontroller 5 decodes the received number information, generates various control signals, and connects the TV camera drive line 13.
It controls the TV camera unit 10 via the switch 3, the video memory 6, and the modem 7, and outputs predetermined control signals to the changeover switch 3, video memory 6, and modem 7. The video memory 6 is a TV
For example, the video signal output from the camera unit 10 is
This is a memory that stores the number of screens. Furthermore, the modem 7 modulates the video signal stored in the video memory 6 into a signal for a telephone line and outputs the modulated signal.

Moreover, the TV camera unit 10 includes a TV camera drive section 1
1 and a TV camera 12. The TV camera drive unit 11 mechanically controls the orientation, zooming, exposure, etc. of the TV camera 12 based on control signals given from the telecontroller 5 via the TV camera drive line 13. The TV camera 12 is installed in a room to be monitored, is controlled by a TV camera drive section 11, captures an image of the object to be monitored, and sends the video signal to the video memory 6 via a video signal line 14.

Next, the operation of the security system according to this embodiment configured as described above will be explained.

Now, if the caller uses a videophone to call his own security system and a line connection is established, the telecontroller 5 switches the selector switch 3 to the modem 7 only while the modulated signal from the modem 7 is being output. Connect to the side. As a result, the video stored in the video memory 6 is transmitted as a still image and displayed on the TV receiver of the source.

If the caller wishes to change the orientation, magnification, exposure, etc. of the TV camera, he or she can give the necessary instructions using the push button on the caller's TV phone while looking at the screen. When such an instruction is given, D T
M. The F signal is received by the DTMF receiver 4, and the received data is input to the telecontroller 5. The telecontroller 5 extracts numerical information (
command) and sends T via the TV camera signal line 13.
A control signal is output to the V camera drive section 11. Thereby, the TV camera drive section 1l controls the direction, zooming, exposure, etc. of the TV camera 1'2.

The video taken by the TV camera 12 is sent to the telecontroller 5.
According to a timing signal supplied to the video memory 6 from and,
The video written in the video memory 6 is modulated by the modem 7 in accordance with the timing signal from the telecontroller 5 and output to the telephone line 2 via the changeover switch 3.

In this way, the changeover switch 3, the TV camera drive unit 11,
Telecontroller 5 for video memory 6 and modem 7
According to the controls, the caller can monitor the interior of the room from any angle by adjusting the direction of the camera relative to the monitoring target, zooming, etc. while viewing the video phone image.

FIG. 2 is a diagram showing a security system according to a second embodiment of the present invention.

In this embodiment, the changeover switch 3 in the first embodiment is
A new home/absence switch 8 is installed between the telephone line 2 and the telephone line 2.
is selectively connected to the security controller 21 and the external telephone 9.

According to this embodiment, by manually switching the home/absence switch 8 using only one telephone line, there is an advantage that it can be used as a telephone when you are at home, and as a security system when you are away.

[Effects of the Invention] As explained above, the present invention allows you to watch TV from your home while you are away. Since you can adjust the position and zoom of the TV camera while looking at the screen, you can observe the situation inside the room in detail and confirm safety without missing anything. .

[Brief explanation of drawings]

FIG. 1 is a block diagram of a security system according to a first embodiment of the invention, and FIG. 2 is a block diagram of a security system according to a second embodiment of the invention. 1.21; security control line, 3; changeover switch, 4 bar, 5; telecontroller, 6; modem, 8; home/absence switch 10; TV camera unit, 1 moving parts, 12; TV camera, 13 line, 14; Video signal line controller, 2; Electric; DTMF receiver; Video memory, 7 switches, 9; Telephone, 1; TV camera drive; TV camera drive 1; Security controller 2; Telephone line 3; Fuki Co., Ltd.

Claims (1)

[Claims] (1) A television camera, a video memory that stores video information from the television camera, and a modulation circuit that modulates the video signal read from the video memory into a signal for transmission via a telephone line. , a receiving circuit that receives command information transmitted via the telephone line, and a control circuit that controls the television camera, video memory, and modulation circuit based on the command information received by the receiving circuit. A security system characterized by the following: