JPH07298184A - Surveillance camera system - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to search for images in the monitoring area where an abnormality has occurred in a short time by using the time code and the alarm code corresponding to each abnormality detection sensor. [Structure] A surveillance camera 1 for converting surveillance video into a video signal, a time code generator 2 for generating a time code signal, and an abnormality detection sensor 3-1 for detecting an abnormality,
An alarm code generator 4 for generating an alarm code signal corresponding to the abnormality detection sensor, a superimposing circuit 5 for superimposing a time code signal and an alarm code signal on a video signal to generate a composite video signal, and recording the composite video signal. A disk recording / reproducing device 6 and a time code searching circuit 8 and an alarm code searching circuit 9 for searching the disk recorded video by the search time code signal or the search alarm code signal are provided, and the disk recorded video is searched by the alarm code or the time code. It is characterized by

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera system with a video recording / reproducing device for use in banks, convenience stores, etc., and unmanned warehouses, factories, etc.

[0002]

2. Description of the Related Art Conventionally, this type of surveillance camera system is equipped with a time-lapse video tape recorder. Normally, a video signal from the surveillance camera is recorded on a video tape as a still image at regular time intervals, and at the same time, time information is recorded. For recording, the time code signal is recorded on a track different from the video recording track of the video tape.

Further, in a system with an alarm recording function, when an alarm input signal is received when an abnormality occurs, the video recording is performed in a preset recording mode and time, and the alarm recording start signal is the same as the time code signal. In addition, the video recording track is recorded on a different track.

When searching and reproducing recorded video,
While fast-rewinding or fast-forwarding the tape, it searches for the track on which the time code signal or alarm recording start signal is recorded, and if found, switches from that position to the tape speed of the specified video playback mode. I was trying to play the video.

In the case of the time-lapse video tape recorder, the video signal is recorded and reproduced while the recording and reproduction head is helically scanned in the longitudinal direction of the tape.
If the search code signal is recorded by superimposing it on the video signal, it will be difficult to detect the search code signal when the tape is rewound or fast forwarded during playback search. The tape is recorded in the longitudinal direction track.

[0006]

However, in the above-mentioned conventional surveillance camera system, since the time-lapse video tape recorder is used for video recording, the recorded video is recorded as time code or alarm information. There is a problem that it takes time to output the video when searching and playing back. In addition, there is a problem in that one surveillance system cannot be equipped with surveillance cameras in the surveillance areas corresponding to a plurality of abnormality detection sensors, and each video record of the surveillance camera cannot be searched and reproduced as needed.

Therefore, the present invention has been made in view of the above-mentioned problems, and a time code and an alarm code corresponding to each of a plurality of abnormality detection sensors are used in a monitoring area corresponding to the abnormality detection sensor that has issued alarm information. An object of the present invention is to provide a surveillance camera system capable of executing video search in a short time.

[0008]

In order to achieve the above object, a surveillance camera system according to the present invention includes a surveillance camera for converting surveillance video into a video signal and a time code generator for generating a time code signal consisting of time information. And an abnormality detection sensor that detects an abnormality in the surveillance area, an alarm code generator that generates an alarm code signal corresponding to the abnormality detection sensor based on alarm information from the abnormality detection sensor, and a time code for the video signal from the surveillance camera. A superimposing circuit for superimposing a signal and an alarm code signal to generate a composite video signal, a disc recording / reproducing device for recording and reproducing the composite video signal superposed by the superimposing circuit on a disc, and a disc recording corresponding to a search time code signal. A time code search circuit that searches for images,
An alarm code search circuit for searching a disc recording image corresponding to a retrieval alarm code signal is provided, and a disc recording image corresponding to a desired alarm code or a desired time code is retrieved.

Further, the surveillance camera system according to the present invention is
In order to achieve the above object, a plurality of surveillance cameras are connected, and a changeover switch for synchronously switching between an abnormality detection sensor and each corresponding surveillance camera installed in a surveillance area corresponding to each surveillance camera, It is characterized in that an alarm code from the corresponding abnormality detection sensor is superimposed on the video signal from the surveillance camera.

Further, in the surveillance camera system according to the present invention, in order to achieve the above-mentioned object, the alarm code search circuit randomly searches the disk recording image corresponding to each alarm code by inputting a plurality of search alarm code signals. It is characterized by that.

Further, in the surveillance camera system according to the present invention, in order to achieve the above-mentioned object, the superimposing circuit separately provides one or more identical time code signals and identical alarm code signals respectively in the vertical blanking period of the video signal. It is characterized in that it is superimposed between the horizontal synchronizing signals in.

In summary, in order to achieve the above-mentioned object, the surveillance camera system according to the present invention detects a time code signal consisting of time information and an abnormality in the surveillance area in the video signal from the surveillance camera which has photographed the surveillance area. A composite video signal is generated by superimposing an alarm code signal containing an alarm code corresponding to each abnormality detection sensor from the abnormality detection sensor to generate a composite video signal, which is recorded in the disc recording / reproducing device, and the desired alarm code or desired time is obtained. The feature is that the disc recorded image corresponding to the code is searched.

The surveillance camera system according to the present invention is
Connect a plurality of surveillance cameras, switch each surveillance camera and its corresponding abnormality detection sensor synchronously, and superimpose the alarm code signal on the corresponding video signal,
In addition, one or more identical time code signals and identical alarm code signals are individually superposed between the horizontal synchronizing signals in the vertical blanking period of the video signal, and a plurality of search alarm code signals are input. Thus, the disc recording image corresponding to each alarm code is randomly searched.

[0014]

The surveillance camera system according to the present invention superimposes the time code signal and the alarm code signal from each abnormality detection sensor on the video signal from the surveillance camera to generate a composite video signal, which is recorded / reproduced on the disc. By recording the image in the device and searching the disk recording video corresponding to the desired alarm code or time code, the video desired to be searched can be output to the video monitor in a short time.

Further, the surveillance camera system according to the present invention is
By connecting multiple surveillance cameras and switching each surveillance camera and its corresponding abnormality detection sensor synchronously, the alarm code signal is superimposed on the corresponding video signal,
By connecting a plurality of surveillance cameras to one surveillance camera system, wide-ranging surveillance can be efficiently performed at low cost.

Also, the surveillance camera system according to the present invention is
Since the one or more same time code signals and the same alarm code signals are individually superposed between the horizontal synchronizing signals in the vertical blanking period of the video signal, the actual output screen and the vertical synchronizing signal are By superimposing the time code signal and the alarm code signal on the video signal without any influence,
Even if one time code or alarm code cannot be read at the time of reproduction, another time code or alarm code can be read, so that the reliability of search for a disk defect or the like is improved.

Further, the surveillance camera system according to the present invention is
By inputting multiple search alarm code signals to randomly search the disk recorded video corresponding to each alarm code, the video desired to be searched can be easily output to the video monitor in a short time. .

[0018]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, FIGS. 1, 2 and 3. 1A and 1B are block diagrams showing a configuration of a video recording / reproducing system of a surveillance camera system according to a first embodiment of the present invention. FIG. 1A is a block diagram of a recording system, and FIG. 1B is a block diagram of a reproducing system. 2 is a block diagram showing the configuration of a video recording system of a surveillance camera system according to a second embodiment of the present invention, and FIG. 3 is a surveillance camera system according to the present invention, in which the time code signal and alarm code signal are NTSC video signals. 3A and 3B are waveform charts showing the waveforms of the composite video signal in the state of being superposed on, where FIG. 4A is a waveform chart of an odd field and FIG.

Next, a surveillance camera system according to a first embodiment of the present invention will be described with reference to FIG. Figure 1
1A, 1 is a surveillance camera for converting a surveillance image obtained by photographing a responsible surveillance area into a video signal including a video signal, a horizontal synchronization signal and a vertical synchronization signal, and 2 is one frame of the video signal It is a time code generator that generates a time code corresponding to time information given to each.

Further, 3-1, 3-2, ..., 3-n are one or more anomaly detection sensors installed to detect various anomalies. There are an infrared sensor for detecting passage, a smoke sensor or a gas sensor for detecting generation of smoke or toxic gas, a microphone sensor for detecting generation of sound, a temperature sensor for detecting generation of heat, and a light sensor for detecting light emission.

Further, 4 is the abnormality detection sensors 3-1 and 3
An alarm code generator that generates an alarm code corresponding to an output signal from -2, ..., 3-n (hereinafter represented by 3-1). The output signal from the abnormality detection sensor 3-1 may be output only when an abnormality occurs, or may be output at regular intervals and an abnormality occurrence code may be attached when an abnormality occurs. Further, the output signal of the abnormality detection sensor 3-1 may simply indicate whether an abnormality has occurred by a positive sign or a negative sign, or may be an identification number of the abnormality detection sensor. The abnormality occurrence code may include the degree of abnormality.

A superimposing circuit 5 outputs a composite video signal by superimposing a time slot and an alarm code signal on a video signal, and 6 records or reproduces a composite video signal on which a time code signal and an alarm code signal are superimposed on a disc. A disk recording / reproducing device 7 is a video monitor for displaying a monitor video on a screen when recording or reproducing a video signal.

Further, in FIG. 1 (b), reference numeral 8 is for retrieving and reproducing the surveillance video corresponding to the retrieval time code signal input for retrieval when the disc on which the surveillance video is recorded is retrieved. The time code retrieval circuit 9 is an alarm code retrieval circuit for retrieving and reproducing the surveillance video corresponding to the retrieval alarm code signal input for retrieval.

Next, the operation of the surveillance camera system according to the first embodiment will be described with reference to FIG. In FIG. 1, the time code signal generated by the time code generator 2 and the alarm code signal generated by the alarm code generator 4 are superimposed on the video signal output from the surveillance camera 1 by the superimposing circuit 5. The method of superimposing the time code signal and the alarm code signal on the video signal will be described later.

The time code generator 2 generates a time code signal for recording time information in frame units of the video signal. When the abnormality detection sensor 3-1 detects an abnormality, the alarm code generator 4 receives it and generates an alarm code signal corresponding to the abnormality detection sensor 3-1. The alarm code signal may correspond to, for example, the output signal of the abnormality detection sensor 3-1 and may identify the identification number or the installation location of the corresponding abnormality detection sensor 3-1. The degree and other information may be included. When the abnormality detection sensor 3-1 is, for example, a combined abnormality detection sensor (for example, a temperature sensor and a smoke sensor),
It is necessary to include the type of abnormality that occurred.

The composite video signal on which the time code signal and the alarm code signal are superimposed by the superimposing circuit 5 is recorded on the disc by the disc recording / reproducing device 6, and the monitor image being recorded can be monitored by the image monitor 7. If no abnormality is detected, the alarm code signal is not generated from the alarm code generator 4, so that the alarm code signal is not recorded on the disc.

Next, when a part of the surveillance video recorded on the disc is searched and desired to be reproduced, the search can be performed by either the time code search method or the alarm code search method. When performing a search by time code, a search time code signal desired to be searched is input to the time code search circuit 8. Thereby,
The time code search circuit 8 and the disc recording / reproducing device 6 interact with each other (details will be described later) to perform a code search to reproduce a monitor video corresponding to the designated code and output it to the video monitor 7.

Similarly, when performing a search by an alarm code, a search alarm code signal desired to be searched is input to the alarm code search circuit 9 to perform the search. It is also possible to input a plurality of search time code signals and search alarm code signals in advance at the time of search and sequentially output those codes, but the disc may randomly search recorded images and output the searched images. It is also possible to cue the monitoring video corresponding to each code and play it for a preset time, or to set it to play from a video slightly before the search video.

As described above, according to the first embodiment, since the time code signal and the alarm code signal are recorded while being superimposed on the video signal, one optical head is provided for one track such as optical disk recording. Since it is possible to record by using the disc recording / reproducing device 6 which records correspondingly,
Random access is possible, and the time required for searching and cueing can be performed considerably faster than in the case of tape recording. In addition, since both the time code signal and the alarm code signal can be recorded at the same time, it is possible to freely search and find out from either code during reproduction.

Further, according to the first embodiment, the alarm code generator 4 can generate and record the alarm code corresponding to each of the plurality of different kinds of abnormality detection sensors 3-1. It is possible to search and reproduce the surveillance video of the surveillance area in which the abnormality has occurred in a short time by using one of the alarm codes corresponding to each of the plurality of abnormality detection sensors 3-1 that have detected the occurrence of the above.

A surveillance camera system according to the second embodiment of the present invention will be described below with reference to FIG. Figure 2
FIG. 1 is a block diagram showing the configuration of a surveillance camera system according to this embodiment. However, the time code generator 2, the alarm code generator 4, the superposition circuit 5 shown in FIG.
The disc recording / reproducing device 6 and the video monitor 7 are the first
The same reference numerals as those in the embodiment are attached and similar to those in the embodiment, and thus the repetitive description will be omitted.

Next, the configurations of the surveillance camera and the abnormality detection sensor in this embodiment will be described. In FIG.
In particular, 1-1, 1-2, ..., 1-n are monitoring cameras (hereinafter represented by 1-1) connected in plural according to the present embodiment, 3-1, 3-2, 3-n. Is the same as in the first embodiment, but in this embodiment, an abnormality detection sensor (hereinafter represented by 3-1) 10-1 and 10- installed corresponding to the surveillance camera 1-1. Reference numeral 2 is a changeover switch (hereinafter, represented by 10-1) that switches the surveillance camera 1-1 and the corresponding abnormality detection sensor 3-1 in synchronization with each other.

In the second embodiment, a plurality of surveillance cameras 1-1 are provided at different locations, that is, different surveillance areas irrespective of whether the building is inside or outside one building (at the same location, the surveillance direction is changed. An error detection sensor 3-1 is installed so as to detect various abnormalities in the monitoring area corresponding to each monitoring camera 1-1. Of course, a plurality of abnormality detection sensors 3-1 may be associated with one surveillance camera 1-1, but in this embodiment,
In order to simplify the explanation, each monitoring camera 1-1 is made to correspond to one abnormality detection sensor 3-1. The changeover switch 10-1 interlocks and synchronously switches the surveillance camera 1-1 installed in each surveillance area and the corresponding abnormality detection sensor 3-1.

Next, the operation of the second embodiment will be described with reference to FIG. 2 again. As described above, the time code generator 2, the alarm code generator 4, the superimposing circuit 5, the disc recording / reproducing device 6, and the video monitor 7 shown in FIG. 2 are similar to those in the first embodiment, and their operations are the same. Since it is similar, the description of the operation is omitted. Therefore, the operations of the surveillance camera 1-1, the abnormality detection sensor 3-1, and the changeover switch 10-1 will be described below.

Each surveillance camera 1-1 installed in each surveillance area
The video signal output from the changeover switch 10-1 is changed over at a preset time interval, and the output signal from the abnormality detection sensor 3-1 is also changed over in synchronization with the changeover switch 10-1. Can be switched by. Then, with respect to the video signal from each surveillance camera 1-1, the output signal from the abnormality detection sensor 3-1 corresponding to each video signal is output to the alarm code generator 4, where the alarm code signal is generated, and then to the superposition circuit 5. Is output. The superimposing circuit 5 superimposes an alarm code signal corresponding to the video signal from the surveillance camera 1-1 and outputs it to the disc recording / reproducing device 6 to record it on the disc. The method of superimposing the alarm code signal on the video signal will be described later.

As described above, according to the second embodiment of the present invention, when an abnormality occurs, the alarm code corresponding to each abnormality detection sensor 3-1 installed in a different place or a monitoring area monitors the abnormality. Since it is recorded on the disc together with the surveillance video in the area, if you know in which surveillance area the abnormality has occurred, you can enter the alarm code and immediately search and play back the situation of the abnormality occurrence to see the abnormal situation. Can be rapidly treated.

Further, when there are a plurality of abnormality occurrence monitoring areas each equipped with the surveillance camera 1-1 and the abnormality detection sensor 3-1, the surveillance image of each surveillance area is automatically searched by the alarm code corresponding to them. It can be stopped there, or it can be sequentially searched at a fixed time interval and reproduced on the video monitor, or the monitoring area can be manually switched.

Next, with reference to FIG. 3, an embodiment of superimposing a time code signal and an alarm code signal on a video signal according to the present invention will be described in detail. FIG. 3 is a waveform diagram showing a waveform of a decoded video signal generated by superimposing a time code signal and an alarm code signal on a video signal.

In FIG. 3, H is a horizontal cycle, which corresponds to the time for one horizontal scan. The odd field scan shown in FIG. 3A is followed by the even field scan shown in FIG. 3B, and one complete screen, that is, a one-frame screen is obtained by two field scans of odd number and even number. Constitute.
Further, the vertical blanking period in FIG. 3 is a portion where a fixed time interval is provided at the transition of each field screen, does not appear on the actual monitor screen, and the video signal is also erased.

The time code signal A is overlapped between the horizontal scanning lines 12 and 14 shown in FIG. 3A in the odd field, and the horizontal scanning line 12-1 shown in FIG. 3B in the even field. And 14-1.
That is, the same time code signal is superposed at a total of four locations per frame. Similarly, the alarm code signal B is provided at four positions between the horizontal scanning lines 16 and 18 shown in FIG. 3A and between the horizontal scanning lines 16-1 and 18-1 shown in FIG. 3B. It is superimposed.

The time code signal is usually superposed on all fields, but the alarm code signal has irregular output timing, so the odd code field and the next even field appearing first after the alarm code signal is output. Overlaid on the field. When searching and reproducing the recorded surveillance video, in the present embodiment, usually, the first code of the same code superimposed at four positions is searched, but the code can be read due to a defect of the disk medium or the like. If not, it is searched by the following code.

As described above, according to this embodiment, since the time code signal and the alarm code signal are superposed between the horizontal synchronizing signals in the vertical blanking period of the video signal, the screen actually displayed and the vertical synchronizing are affected. It has the advantage that it can be superimposed without affecting. Again 1
Since a plurality of identical code signals are superposed and recorded on the disc per frame, even if a code reading error occurs due to a medium defect or the like, it is possible to search if any one code can be read, and the reliability of the search is improved. Can be improved.

In the embodiment shown in FIG. 3, the case of the analog video signal waveform is shown, but similarly in the case of the digital video signal waveform, similarly, between the horizontal synchronizing signals in the vertical blanking period, that is, the horizontal scanning line. A time code signal and an alarm code signal can be superimposed in the meantime.

[0044]

The surveillance camera system according to the present invention is configured as described above, and in particular, the corresponding time code signal and alarm code signal are superimposed on the video signal from the surveillance camera to generate a composite video signal. However, by recording it on the disc recording / playback device and searching for the corresponding disc recorded image by the desired alarm code or time code, it is possible to search easily compared to tape and the desired image Since it is possible to perform a search and cueing in a short time and output the result to the video monitor, it is possible to confirm whether or not an abnormality has occurred and quickly take action when an abnormality occurs.

Further, the surveillance camera system according to the present invention is
By configuring as described above, and in particular by superimposing the corresponding time code signal and alarm code signal on the video signal, all of these signals can be recorded on one track, so that a normal optical disk device is used. It is possible to easily execute the recording / reproducing on the disc by using the one-track recording / reproducing apparatus as described above.

Further, the surveillance camera system according to the present invention is
Since it is configured as described above and in particular has both the time code search circuit and the alarm code search circuit,
When playing back the surveillance video, it is possible to freely search by either the time code or the alarm code.

Further, the surveillance camera system according to the present invention is
With the configuration described above, in particular, since an alarm code corresponding to each of the plurality of abnormality detection sensors can be generated and the corresponding image can be recorded by the alarm code, the image corresponding to the specific abnormality detection sensor can be recorded. The record can be searched and played.

Further, the surveillance camera system according to the present invention is
Since the time code signal and the alarm code signal are superposed between the horizontal synchronizing signals in the vertical blanking period of the video signal as described above, the time code signal and the alarm code signal are not overlapped with the actual output screen and the vertical synchronizing signal. It is possible to easily superimpose on the same record without affecting.

Further, the surveillance camera system according to the present invention is
With the configuration as described above, in particular, a plurality of identical code signals are individually recorded for one field screen. Therefore, if any one of the identical codes can be detected, it becomes possible to perform a search. Improves reliability.

Further, the surveillance camera system according to the present invention is
With the configuration as described above, in particular, a plurality of surveillance cameras are connected to one surveillance camera system, and each surveillance camera and the abnormality detection sensor corresponding thereto are synchronously switched to generate an alarm code for a corresponding video signal. By superimposing signals so that a plurality of surveillance cameras can be connected to one surveillance camera system, wide-ranging surveillance can be efficiently performed at low cost.

Further, the surveillance camera system according to the present invention is
By inputting multiple search alarm code signals to randomly search the disk recorded video corresponding to each alarm code, you can easily search for the video you want to search in a short time and output it to the video monitor. be able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a video recording / reproducing system of a surveillance camera system according to a first embodiment of the present invention, where (a) is a block diagram of a recording system and (b) is a block diagram of a reproducing system.

FIG. 2 is a block diagram showing a configuration of a video recording system of a surveillance camera system according to a second embodiment of the present invention.

FIG. 3 is a surveillance camera system according to the present invention, wherein the time code signal and the alarm code signal are NTSC.
3A is a waveform diagram showing a waveform of a composite video signal in a state of being superimposed on a system video signal, wherein (a) is an odd field waveform diagram and (b) is an even field waveform diagram.

[Explanation of symbols]

 1 Surveillance camera 1-1, ..., 1-n Surveillance camera 2 Time code generator 3-1 ,. 7 Video Monitor 8 Time Code Search Circuit 9 Alarm Code Search Circuit 10-1, 10-2 Changeover Switch A Time Code Signal B Alarm Code Signal H Horizontal Cycle

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Claims (4)

[Claims] 1. A surveillance camera for converting surveillance video into a video signal, a time code generator for generating a time code signal consisting of time information, an abnormality detection sensor for detecting an abnormality in a surveillance area, and an abnormality detection sensor for detecting the abnormality. An alarm code generator that generates an alarm code signal corresponding to the abnormality detection sensor based on alarm information, and a superimposing circuit that superimposes a time code signal and an alarm code signal on a video signal from the surveillance camera to generate a composite video signal. A disc recording / reproducing apparatus for recording and reproducing the composite video signal superimposed by the superimposing circuit on a disc, a time code search circuit for searching a disc recorded image corresponding to the search time code signal, and a search alarm code signal. With an alarm code search circuit to search the disc recorded video Includes, surveillance camera system, characterized in that to search for the disk recording images corresponding to the alarm code or time code Yes Yes. 2. A plurality of the monitoring cameras are connected to each other, and a changeover switch for synchronously switching between an abnormality detection sensor and a corresponding monitoring camera installed in a monitoring area corresponding to each of the monitoring cameras is provided. 2. The surveillance camera system according to claim 1, wherein an alarm code from a corresponding abnormality detection sensor is superimposed on a video signal from the surveillance camera. 3. The surveillance camera according to claim 1, wherein the alarm code retrieval circuit randomly retrieves a disc recording image corresponding to each alarm code by inputting a plurality of retrieval alarm code signals. system. 4. The superimposing circuit superimposes one or more identical time code signals and identical alarm code signals individually between horizontal synchronizing signals in a vertical blanking period of a video signal. 1, 2, or 3
The surveillance camera system described.