JPH0816943A - Monitor camera - Google Patents

Monitor camera

Info

Publication number
JPH0816943A
JPH0816943A JP6144435A JP14443594A JPH0816943A JP H0816943 A JPH0816943 A JP H0816943A JP 6144435 A JP6144435 A JP 6144435A JP 14443594 A JP14443594 A JP 14443594A JP H0816943 A JPH0816943 A JP H0816943A
Authority
JP
Japan
Prior art keywords
surveillance camera
sync signal
surveillance
synchronization
master
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6144435A
Other languages
Japanese (ja)
Inventor
Jusaku Atsumi
重作 渥美
Original Assignee
Atsumi Electron Corp Ltd
アツミ電氣株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atsumi Electron Corp Ltd, アツミ電氣株式会社 filed Critical Atsumi Electron Corp Ltd
Priority to JP6144435A priority Critical patent/JPH0816943A/en
Publication of JPH0816943A publication Critical patent/JPH0816943A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Summary] [Purpose] To construct a surveillance camera system at low cost. [Structure] The surveillance camera 1 has a sync signal generation circuit 5 built-in and a sync signal output terminal 9 for outputting the sync signal generated by the sync signal generation circuit 5 to the outside. Therefore, when configuring a surveillance camera system with multiple surveillance cameras, one surveillance camera operates as a master in internal synchronization, and the other surveillance cameras operate as slaves by supplying the synchronization signal generated by the master. It operates in synchronization with the synchronization signal of the master. [Effect] Unlike the conventional surveillance camera system, since it is not necessary to provide a synchronization signal generation unit, the configuration is simple and inexpensive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera.

[0002]

2. Description of the Related Art Surveillance cameras are widely used for monitoring the condition of a predetermined place or for intruders, but it is generally possible to switch between internal synchronization and external synchronization. An example of the configuration is shown in FIG.

FIG. 3 is a diagram showing a configuration example of a conventional surveillance camera. In the figure, 2 is a solid-state image sensor, 3 is a signal processing circuit,
Reference numeral 4 is a drive circuit, 5 is a sync signal generation circuit, 6 is a switch (hereinafter referred to as SW), 7 is a video signal output terminal, 8 is a sync signal input terminal, and 20 is a surveillance camera.

In FIG. 3, the solid-state image pickup device 2 is composed of a CCD and is driven by a control signal from a drive circuit 4. Then, the video signal output from the solid-state image sensor 2 is subjected to predetermined processing such as addition of a synchronization signal in the signal processing circuit 3 and output from the video signal output terminal 7.

The signal processing circuit 3 and the drive circuit 4 have a SW
Either the sync signal from the sync signal generation circuit 5 or the sync signal input from the sync signal input terminal 8 is supplied via 6.

Therefore, the S signal is supplied so that the sync signal from the sync signal generating circuit 5 is supplied to the signal processing circuit 3 and the driving circuit 4.
If W6 is set, the surveillance camera 20 can be used alone.

However, when using a plurality of surveillance cameras, the images from the plurality of surveillance cameras are switched in a predetermined order at predetermined time intervals, or the images from a desired surveillance camera are switched at an arbitrary timing. One monitor is used for monitoring, and at this time, it is required that the images are not disturbed when the images are switched.

Therefore, when images from a plurality of surveillance cameras are to be monitored on a single monitor, as shown in FIG. 4, a sync signal generating unit 21 for generating a sync signal is provided, and the sync signal generating unit 21 is used. Is supplied to each surveillance camera 20 1 , 20 2 , 20 3 , 20 4 .

FIG. 4 shows four monitoring cameras 20 1 , 20.
FIG. 2 is a diagram showing a configuration example of a surveillance camera system when using 2 , 20 3 and 20 4 , but in such a configuration, the synchronization signal input terminal 8 of all the surveillance cameras 20 1 to 20 4 is used.
Is a sync signal output terminal of the sync signal generation unit 21 (see FIG.
(Not shown) is connected with a signal line.

Further, the SW of each surveillance camera 20 1 to 20 4
6 is set to select the sync signal from the sync signal input terminal 8.

Accordingly, since the synchronizing signals from the monitoring camera 20 1 to 20 4 sync signal generating unit 21 in is supplied, it is clear that the video signals from the monitoring camera 20 1 to 20 4 are synchronized is there.

The video signals from the surveillance cameras 20 1 to 20 4 are input to the switcher 22, and the images from the desired surveillance camera 20 are switched in a predetermined order at predetermined time intervals or at desired timing. It is input to the recording device 23 such as a VTR. Since the recording device 23 records an image and outputs the input video signal as it is to the monitor 24, the video signal output from the switcher 22 is displayed on the monitor 24.

In this configuration, when the switcher 22 detects the vertical synchronization signal, more specifically, when the surveillance camera 20 outputs a video signal conforming to the standard system, the vertical synchronization of the odd field is performed. Since it is designed to switch the image when a signal is detected,
The image is not disturbed when the image is switched.

[0014]

However, in the conventional surveillance camera, when constructing a system using a plurality of surveillance cameras, the synchronization signal generation unit 21 must be provided as shown in FIG. Therefore, there is a problem that the surveillance camera system is expensive.

An object of the present invention is to solve the above problems and to provide a surveillance camera capable of inexpensively constructing a surveillance camera system using a plurality of surveillance cameras.

[0016]

In order to achieve the above object, a surveillance camera of the present invention is a surveillance camera having a built-in synchronization signal generation circuit, wherein a synchronization signal generated by the synchronization signal generation circuit is output to the outside. It is characterized by having a terminal for.

[0017]

The surveillance camera of the present invention is a surveillance camera having a built-in synchronizing signal generating circuit, and is provided with a terminal for outputting the synchronizing signal generated by the synchronizing signal generating circuit to the outside.

Therefore, in the case of constructing a surveillance camera system using a plurality of surveillance cameras according to the present invention, one surveillance camera is used as a master to output a synchronization signal, and the other surveillance cameras are synchronized as slaves from the master. It can be operated based on a signal. Further, it is possible to set any surveillance camera as the master.

Furthermore, since it is not necessary to provide a synchronizing signal generating unit as in the conventional case, the system configuration is simplified,
In addition, it becomes possible to configure at low cost.

[0020]

Embodiments will be described below with reference to the drawings.
FIG. 1 is a diagram showing the configuration of an embodiment of a surveillance camera according to the present invention, in which 1 is a surveillance camera and 9 is a sync signal output terminal. It should be noted that the same components as those shown in FIG. 3 are designated by the same reference numerals to omit redundant description.

The surveillance camera 1 shown in FIG. 1 differs from the surveillance camera 20 shown in FIG. 3 only in that it has a sync signal output terminal 9 for outputting the sync signal generated by the sync signal generation circuit 5 to the outside. Is different.

Therefore, if the SW 6 is set so as to supply the synchronizing signal from the synchronizing signal generating circuit 5 to the signal processing circuit 3 and the driving circuit 4, the surveillance camera 1 can be used independently. Similar to a camera.

Next, a case of constructing a surveillance camera system using a plurality of surveillance cameras 1 shown in FIG. 1 will be described with reference to FIG.
Will be described with reference to.

FIG. 2 is a diagram showing an example of the configuration of a surveillance camera system when four surveillance cameras 1 are used. In this example, the surveillance camera 1 1 is set as a master, and the surveillance cameras 1 2 , 1 3 , 1 4 are both set as slaves.

[0025] That is, the monitoring camera 1 1 SW6 is set to supply the synchronizing signal from the synchronizing signal generating circuit 5 to the signal processing circuit 3 and the drive circuit 4.

On the other hand, the surveillance cameras 1 2 , 1 3 , 1
The synchronization signal input terminal 8 of 4 is connected to the synchronization signal output terminal 9 of the surveillance camera 1 1 and the signal line, and the SW 6 of these surveillance cameras 1 2 , 1 3 and 1 4 is from the synchronization signal input terminal 8 It is set so as to supply the synchronizing signal of 1 to the signal processing circuit 3 and the drive circuit 4. As a result, the surveillance cameras 1 2 , 1 3 and 1 4 operate in synchronization with the surveillance camera 1 1 .

That is, the master operates in internal synchronization and the slave operates in external synchronization. It is obvious that which surveillance camera is to be the master can be set arbitrarily.

As described above, by using the surveillance camera according to the present invention, when constructing a surveillance camera system, it is not necessary to provide a synchronization signal generating unit as in the conventional case, so that the system configuration is simplified. Not only that, it can be constructed at low cost.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made. For example, in the above embodiment, the signal processing circuit 3 and the driving circuit 4 are described as separate components, but it is obvious that these circuits can be configured by one IC.

Further, the switcher may have a function of not only switching the images from the monitoring cameras but also combining the images from the plurality of monitoring cameras as one image.

Further, in the above embodiment, the synchronizing signal input terminal 8 and the synchronizing signal output terminal 9 are provided.
These terminals use either one of the terminals regardless of whether the surveillance camera is used as a master or a slave, so that it is possible to use one terminal and switch it by the switch 6. Is.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a surveillance camera according to the present invention.

FIG. 2 is a diagram showing a configuration example of a surveillance camera system configured by using a plurality of surveillance cameras shown in FIG.

FIG. 3 is a diagram showing a configuration example of a conventional surveillance camera.

FIG. 4 is a diagram showing a configuration example of a surveillance camera system configured by using a plurality of conventional surveillance cameras.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Surveillance camera, 2 ... Solid-state image sensor, 3 ... Signal processing circuit, 4 ... Driving circuit, 5 ... Sync signal generating circuit, 6 ... Switch, 7 ... Video signal output terminal, 8 ... Sync signal input terminal, 9
... sync signal output terminal, 20 ... monitoring camera, 21 ... sync signal generating unit, 22 ... switcher, 23 ... recording device,
24 ... Monitor.

Claims (1)

[Claims]
1. A surveillance camera having a built-in synchronization signal generation circuit, comprising a terminal for outputting a synchronization signal generated by the synchronization signal generation circuit to the outside.
JP6144435A 1994-06-27 1994-06-27 Monitor camera Pending JPH0816943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6144435A JPH0816943A (en) 1994-06-27 1994-06-27 Monitor camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6144435A JPH0816943A (en) 1994-06-27 1994-06-27 Monitor camera

Publications (1)

Publication Number Publication Date
JPH0816943A true JPH0816943A (en) 1996-01-19

Family

ID=15362143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6144435A Pending JPH0816943A (en) 1994-06-27 1994-06-27 Monitor camera

Country Status (1)

Country Link
JP (1) JPH0816943A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7199820B2 (en) 2001-02-13 2007-04-03 Canon Kabushiki Kaisha Synchronizing image pickup process of a plurality of image pickup apparatuses
JP2007201701A (en) * 2006-01-25 2007-08-09 Mitsubishi Electric Corp Camera apparatus, and video monitoring system
CN100444618C (en) * 1999-04-30 2008-12-17 松下电器产业株式会社 Frame converter and conversion method, and digital camera and monitor system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100444618C (en) * 1999-04-30 2008-12-17 松下电器产业株式会社 Frame converter and conversion method, and digital camera and monitor system
US7199820B2 (en) 2001-02-13 2007-04-03 Canon Kabushiki Kaisha Synchronizing image pickup process of a plurality of image pickup apparatuses
JP2007201701A (en) * 2006-01-25 2007-08-09 Mitsubishi Electric Corp Camera apparatus, and video monitoring system
JP4704220B2 (en) * 2006-01-25 2011-06-15 三菱電機株式会社 Camera device and video surveillance system

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