JPH05130616A - Monitoring video recorder - Google Patents

Abstract

PURPOSE:To enable permanently preserving alarm generation information and knowing the alarm generation information, as well by a device other than a used device. CONSTITUTION:The monitoring video recorder for monitoring the inside of a shop or the like and recording monitoring information is provided with an alarm signal superposing circuit 3 for superposing an alarm signal (b) detected from an alarm detector 2 to a video signal (a) obtained from a video camera 1, a timer signal superposing circuit 4 for superposing a clocking signal (d) generated from a clocking signal generator 5 to a superposed signal (c) outputted from the circuit 3, a video tape recorder 6 for recording a superposed signal (e) outputted from the circuit 4 and a memory circuit 7 for the alarm signal (b) and the timer signal (d).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance video recording apparatus as a security system for monitoring the inside of a store and recording the information.

[0002]

2. Description of the Related Art Conventionally, this type of surveillance video recording apparatus has a structure as shown in FIG. Reference numeral 1 is a video camera for monitoring, and a video signal a from the video camera 1 is input to a time signal superimposing circuit 4, and a time signal d of a clock 5 is superposed on a vertical blanking period or a video period of the video signal. It The superposed signal f output from the clock signal superposing circuit 4 is recorded on the video tape by the VTR (video tape recorder) 6.

An alarm detector 2 generates an alarm signal b when an intruder or the like exists.
The alarm signal b from is recorded in the memory circuit 7 together with the clock signal d of the timepiece 5. With such a configuration, the time when the alarm detector 2 generates the alarm signal b can be known by the memory circuit 7, and the situation at that time can be visually recognized by the reproduced image of the VTR 6.

[0004]

In the above-described conventional surveillance video recording apparatus, the alarm signal b from the alarm detector 2 is only recorded in the memory circuit 7 together with the timing signal d, and therefore is input to the memory circuit 7. When the information exceeds the storage capacity of the memory circuit 7, the alarm signal b overflows and is not stored, and it may not be possible to know the alarm signal b and the time d when the alarm occurs. Further, since the alarm information is recorded only in the memory circuit 7 of the device used, when the video tape recorded by the VTR 6 of this device is reproduced by another device, the alarm signal at the time of the alarm and its time are known. There was a drawback that it could not be done and that the information could be lost.

The present invention has been made in order to solve the above-mentioned problems, and information of alarm occurrence can be permanently stored, and the information of alarm occurrence can be known by a device other than the device used for recording the alarm information. It is an object of the present invention to provide a surveillance video recording device capable of performing the above.

[0006]

To achieve the above object, the present invention provides a video camera for forming a video signal, an alarm detector for generating an alarm signal, and an alarm for superimposing the alarm signal on the video signal. A signal superimposing circuit,
A time signal generator that generates a time signal, a time signal superimposing circuit that further superimposes the time signal on the superimposition signal from the alarm signal superimposing circuit, and a video tape recorder that records the superimposition signal from the time signal superimposing circuit. , A memory circuit for recording the alarm signal from the alarm detector and the time signal from the time signal generator.

[0007]

According to the present invention, the alarm signal from the alarm detector and the time signal from the time signal generator are not only recorded in the memory circuit, but are also recorded by the alarm signal superimposing circuit and the time signal superimposing circuit. It is superposed on the signal and recorded on the video tape recorder.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a surveillance video recording apparatus of the first embodiment.

Reference numeral 1 is a video camera for monitoring, which photographs the inside of a store or the like and outputs a video signal a thereof. An alarm detector 2 generates an alarm signal b when an intruder or the like is present. Reference numeral 3 denotes an alarm signal superimposing circuit. The alarm signal superimposing circuit 3 inputs the video signal a from the video camera 1, superimposes the alarm signal b from the alarm detector 2 on the video signal a, and superimposes it. The signal c is output to the clock signal superimposing circuit 4. The structure of the alarm signal superposition circuit 3 is shown in FIG.

In FIG. 2, reference numeral 31 denotes a dimming generation circuit, and when the timing generation circuit 31 inputs the video signal a and the alarm signal b, the alarm signal b is superimposed on the video signal a and the selection switch 32 is set at that timing.
Is controlled to switch the connection between the output terminal 33 of the alarm signal superimposing circuit 3 and the input terminal 34 of the time signal superimposing circuit 4.

FIG. 3 shows a superposition signal c formed by the alarm signal superposition circuit 3. That is, as shown in FIG. 3, the alarm signal superimposing circuit 3 records the alarm signal b in the vertical blanking period or the video period of the video signal a and outputs the superimposing signal c to the time signal superimposing circuit 4. The clock signal superimposing circuit 4 is a circuit for superimposing the clock signal d output from the timepiece 5 on the superimposing signal c from the alarm signal superimposing circuit 3. Specifically, it has almost the same structure as in FIG. 2, and records the clock signal d in the vertical blanking period or the video period of the video signal a included in the superposition signal c and outputs the superposition signal e.

A video tape recorder (VTR) 6 has a function of recording the superposition signal e from the timing signal superposition circuit 4 on a video tape (not shown) and a function of reproducing the video tape. A memory circuit 7 receives an alarm signal b from the alarm detector 2 and stores and records the alarm signal b and the clock signal d from the clock 5.

Next, the operation of this embodiment will be described.
When there is an intruder or the like, an alarm signal b is emitted from the alarm detector 2 and this alarm signal b is input to the alarm signal superposing circuit 3 and the memory circuit 7. The alarm signal b input to the alarm signal superposition circuit 3 is superposed on the video signal a from the video camera 1, and the superposition signal c shown in FIG. 3 is output from the alarm signal superposition circuit 3.

The superimposition signal c is superposed with the time measurement signal d by the time measurement signal superposition circuit 4, and the superposition signal e in which the alarm signal b and the time measurement signal d at that time are recorded in the video signal a is outputted from the time measurement signal superposition circuit 4 to the VTR 6. Is output to. And VTR
6, the superposition signal e is recorded on the video tape, and the content of the superposition signal e is stored on the video tape. Therefore, the alarm signal b and the clock signal d at the time of occurrence
The alarm occurrence information of and is permanently stored on the video tape. Also, even if this video tape is played back using a device other than the device that recorded the alarm occurrence information, the alarm occurrence information can be known. On the other hand, the alarm signal b input to the memory circuit 7 is stored and recorded in the memory circuit together with the time measurement information d from the timepiece 5.

FIG. 4 is a block diagram showing the surveillance video recording apparatus of the second embodiment. This embodiment is different from the first embodiment in that it has a plurality of video cameras 1 and 11 and alarm detectors 2 and 12. In the figure, reference numeral 35 denotes an alarm signal selection switch, and by switching the alarm signal selection switch 35, the alarm signal b of either the alarm detector 2 or 12 can be selected and taken out.

On the other hand, reference numeral 36 is a video signal selection switch. By switching the video signal selection switch 36, the video signal a of either the video camera 1 or 11 is switched.
Can be selected and taken out. The video signal selection switch 36 and the alarm signal selection switch 35 are interlocked and switched. That is, the video signal selection switch 36 and the alarm signal selection switch 35 are
The video camera 1 and the alarm detector 2 are switched to turn on either the video camera 11 and the alarm detector 12.

Therefore, the video camera 1 and the alarm detector 2 are installed in one place, the video camera 11 and the alarm detector 12 are installed in another place, and the switches 35 and 3 are installed.
Multiple locations can be monitored and recorded by switching 6 as required. The rest of the configuration, operation, etc. are the same as in the first embodiment, so a description thereof will be omitted.

[0018]

As described above, according to the present invention, since the alarm signal and the clock signal thereof are recorded in the video tape recorder in a state of being superimposed on the video signal, these information are recorded in the video tape of the video tape recorder. It can be stored permanently and will not be lost as long as the videotape is stored. Further, as long as the above video tape is present, an excellent effect that even a device other than the device which recorded the video tape can know the alarm generation information indicating the alarm signal and the clock signal by reproducing the video tape. There is.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing an alarm signal superimposing circuit.

FIG. 3 is a diagram showing an example of a superimposed signal formed by an alarm signal superimposing circuit.

FIG. 4 is a block diagram showing a second embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional surveillance video recording device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Video camera 2 ... Alarm detector 3 ... Alarm signal superposition circuit 4 ... Time signal superposition circuit 5 ... Clock (time signal generator) 6 ... Video tape recorder 7 ... Memory circuit

Claims (1)

[Claims] 1. A video camera for forming a video signal, an alarm detector for generating an alarm signal, an alarm signal superimposing circuit for superimposing the alarm signal on the video signal, and a timing signal generator for generating a timing signal. , A clock signal superimposing circuit that further superimposes the time measuring signal on the superimposing signal from the alarm signal superimposing circuit, a video tape recorder that records the superimposing signal from the time measuring signal superimposing circuit, and an alarm signal from the alarm detector. A monitoring video recording device, comprising: a memory circuit for recording a timing signal from the timing signal generator.