JP3223165B2 - Surveillance camera remote control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a remote control device for a surveillance camera.

[0002]

2. Description of the Related Art Surveillance cameras are installed near entrances and exits of stores,
2. Description of the Related Art A surveillance system that displays an image captured by a surveillance camera on a monitor and records the image on a VTR has been developed.

Various camera adjustments such as iris for the surveillance camera are performed by operating an operation unit provided in the surveillance camera. However, it is difficult to perform such a camera adjustment with the surveillance camera installed.

Therefore, there is a camera in which a remote control device is connected via a cable for remote control, which is different from a cable for outputting an image of a surveillance camera to a monitor or the like, to remotely control camera adjustment. However, in such a remote control device, the surveillance camera and the remote control device must be connected via a remote control cable, and thus there is a problem that the installation work is complicated and the cost is high.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a surveillance camera remote control device which can be easily installed and has a simple structure.

[0006]

A surveillance camera remote control device according to the present invention includes a surveillance camera and a remote control connected to the surveillance camera via a first video signal line through which a video signal generated by the surveillance camera is transmitted. An operation unit, and a monitor connected to the remote operation unit via a second video signal line from which a video signal sent to the remote operation unit is transmitted. The remote operation unit adjusts a monitoring camera.
A plurality of types of operation keys, when the operation key is operated, means for generating a key code corresponding to the operated key, modulates the generated key code to the first video signal line as the remote operation signal The surveillance camera includes a transmitting means and a filter for preventing the modulated remote control signal from being transmitted to the second video signal line, and the surveillance camera is transmitted from the remote control unit via the first video signal line. demodulation means for extracting the remote control signal to demodulate, based on the key code obtained by the demodulation means, on-screen display system
On-screen display control processing means for performing control processing; and
Based on the key code obtained by the demodulation means,
Adjustment means for adjusting the
The display control processing means includes a key obtained by the demodulation means.
Configure an operation guidance screen for adjusting the monitoring camera according to the code
Means for generating on-screen display data, and
The generated on-screen display data to a first video signal line,
Monitor via remote control unit and second video signal line
The generated on-screen display data to
It is characterized by comprising means for sending out the image signal to the first video signal line .

[0007]

[0008]

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of the monitoring system.

The monitoring system is a CCTV monitoring camera 1
A control unit (remote operation unit) 3 connected to the CCTV monitoring camera 1 via a BNC cable 2, and a BNC cable 4 connected to the control unit 3.
And a monitor 5 and a VTR 6 connected via the.

The control unit 3 is provided with four-directional cursor switches 71 to 74 and a set switch 75 (see FIG. 2).

FIG. 2 shows the configuration of the control unit 3.

When any one of the keys 71 to 75 provided in the control unit 3 is pressed, the key code generation unit 31 generates a key code corresponding to the pressed key. The generated key code is FM-modulated by the FM modulator 32 using a carrier having a frequency of 12 MHz. The obtained FM wave (hereinafter, referred to as a remote control signal) is transmitted to the BNC cable 2 via the buffer 33 and transmitted to the monitoring camera 1.

The frequency band of the video signal transmitted from the surveillance camera 1 to the BNC cable 2 is, as shown in FIG.
The frequency band of the remote operation signal output from the control unit 3 is 12 MHz.
The band is centered on Hz.

The video signal sent from the monitoring camera 1 to the control unit 3 via the BNC cable 2 is
The signal is transmitted to the BNC cable 4 via a trap filter 34 for removing a signal near the 12 MHz frequency band, transmitted to the monitor 5, and displayed. If necessary, the video is recorded by the VTR 6.

FIG. 4 shows the configuration of the monitoring camera 1.

A remote control signal sent from the control unit 3 to the monitoring camera 1 via the BNC cable 2 is a buffer 11 and a band-pass filter (BPF) 1 that passes only signals in a frequency band near 12 MHz.
2 and amplified by an amplifier (AMP) 13, and then demodulated by an FM demodulator 14.

The key code obtained by the FM demodulator 14 is sent to the control device 15. The control device 15 is an FM
On the basis of the key code sent from the demodulator 14, an on-screen display control signal for controlling the on-screen IC 16 is generated.
7 for controlling the camera.

The on-screen IC 16 generates on-screen display data according to the on-screen display control signal. This on-screen display data is supplied to a BN via a video out driver 18 and a trap filter 19 for removing a signal near a frequency band of 12 MHz.
It is sent to the C cable 2 and sent to the monitor 5 via the control unit 3 and the BNC cable 4 for display.

The camera signal processing DSP 17 performs camera adjustment processing according to the camera adjustment control signal.

The video captured by the surveillance camera 1 is transmitted to the BNC cable 2 via the DSP 17, video out driver 18, and trap filter 19.

For example, a case where the iris adjustment for the monitoring camera 1 is remotely controlled using the control unit 3 will be described.

Set key 75 of control unit 3
By pressing, a menu screen, a part of which is shown in FIG. That is, when the set key 75 of the control unit 3 is pressed, the set key 75
Is transmitted from the control unit 3 to the monitoring camera 1, an on-screen display control signal for displaying a menu screen is generated by the control device 15, and the generated signal is transmitted to the on-screen IC 16.

The on-screen IC 16 includes a controller 15
The display data of the menu screen is generated based on the on-screen display control signal sent from the PC. The display data of the menu screen is transmitted to the BNC cable 2 via the video out driver 18 and the trap filter 19. As a result, a menu screen, a part of which is shown in FIG.

While the menu screen is displayed, the user operates the cursor keys 71 to 74 to select the item "
When "AI" is selected, as shown in FIG.
That is, when the cursor key 73 is pressed while the menu screen is displayed, a remote operation signal corresponding to the pressed cursor key is transmitted from the control unit 3 to the monitoring camera 1. Then, in the control device 15, an on-screen display control signal for blinking the selected item selected by the cursor key is generated and sent to the on-screen IC 16.

The on-screen IC 16 includes a control device 15
Based on the on-screen display control signal sent from the PC, display data for blinking the selection item selected by the cursor key is generated. The generated display data is transmitted to the BNC cable 2 via the video out driver 18 and the trap filter 19. As a result, the selection item selected by the pressed cursor key blinks.

As shown in FIG. 6, when the set key 75 is pressed while the selection item "AI" is blinking,
An iris adjustment screen is displayed on the monitor 5 as shown in FIG. That is, when the set 75 is pressed while the selection item “AI” on the menu screen is blinking, a remote operation signal corresponding to the set key 75 is sent from the control unit 3 to the monitoring camera 1. Then, the control device 15 generates an on-screen display control signal for displaying the iris adjustment screen, and generates an on-screen IC.
16 is sent.

The on-screen IC 16 is connected to the control device 15
The display data of the iris adjustment screen is generated on the basis of the on-screen display control signal transmitted from the control unit. The generated display data is transmitted to the BNC cable 2 via the video out driver 18 and the trap filter 19. Thereby, the iris adjustment screen is displayed on the monitor 5.

In FIG. 7, a square mark is an index indicating an iris adjustment level, and is moved as shown in FIG. 8 by operating the cursor keys 72 or 74, for example. That is, the cursor key 72 or 74
Can select a desired level.

To end the iris adjustment, the following 2
There are two ways.

The first method is to use the cursor keys 71 or 7
3 is operated to select the selection item "MENU", and then the set key 75 is pressed. In this case, the control device 1 is controlled based on a remote control signal indicating that the set key 75 has been pressed.
5 generates both an on-screen display control signal for displaying the menu screen and a camera adjustment control signal for adjusting the iris to the currently set level.

The DSP 17 adjusts the iris based on the camera adjustment control signal. Also, on-screen I
C16 generates display data of the on-screen screen based on the on-screen display control signal. Since this display data is sent to the BNC cable 2 via the video out driver 18 and the trap filter 19,
The on-screen screen is changed from the iris adjustment screen to the menu screen.

The second method is to use the cursor keys 71 or 7
3 is operated to select the selection item "END", and then the set key 75 is pressed. In this case, the control device 15 is controlled based on a remote control signal indicating that the set key 75 has been pressed.
Generates both an on-screen display control signal for erasing the on-screen screen and a camera adjustment control signal for adjusting the iris to the currently set level.

The DSP 17 adjusts the iris based on the camera adjustment control signal. Also, on-screen I
C16 erases the on-screen screen based on the on-screen display control signal.

In the above embodiment, the key code corresponding to the pressed key is FM-modulated in the control unit 3, but may be AM-modulated. For example, if the key code is represented by a 4-digit binary number,
A 12 MHz signal may be generated only during the period in which the key code is “1”.

When the AM modulation is employed as described above, a circuit including a detection circuit and a comparator for binarizing the output of the detection circuit is provided instead of the FM demodulator 14 on the surveillance camera 1 side. Used.

According to the above-described embodiment, since a dedicated cable for connecting the control unit 3 to the monitoring camera 1 is not required, the installation work is simplified.

It is conceivable that the remote control signal is transmitted while being superimposed on the blanking period of the video signal. In this case, a synchronous circuit is required in the control unit.
In the above embodiment, the remote control signal is FM-modulated or A-modulated.
Since the signal is M-modulated and sent to the video signal line (BNC cable 2), there is no need to provide a synchronization circuit in the control unit.

Further, in the above embodiment, the remote control signal representing the key code corresponding to the key provided on the control unit 3 is only transmitted from the control unit 3, and the surveillance camera 1 performs on-screen display. Since the control and the camera adjustment processing are performed, the configuration of the control unit is simplified.

[0041]

According to the present invention, a remote control device for a surveillance camera which can be easily installed and has a simple structure is realized.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a monitoring system.

FIG. 2 is a block diagram illustrating a configuration of a control unit.

FIG. 3 is a graph showing a frequency band of a video signal and a frequency band of a remote control signal.

FIG. 4 is a block diagram illustrating a configuration of a surveillance camera.

FIG. 5 is a schematic diagram showing an example of a menu screen.

FIG. 6 is a schematic diagram showing a state in which the selection item “AI” blinks when the selection item “AI” is selected on the menu screen.

FIG. 7 is a schematic diagram illustrating an example of an iris adjustment screen.

FIG. 8 is a schematic diagram showing a state in which an iris level is changed on an iris adjustment screen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surveillance camera 2 BNC cable 3 Control unit 4 BNC cable 5 Monitor 71-75 Key 31 Key code generation part 32 FM modulation 33 Buffer 34 Trap filter 11 Buffer 12 Bandpass filter 14 FM demodulator 15 Control device 16 On-screen IC 17 Camera Signal processing DSP 18 Video out driver 19 Trap filter

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 7/18 H04N 5/225 H04N 5/232 G08B 13/196

Claims (1)

(57) [Claims] 1. A surveillance camera, a remote control unit connected to the surveillance camera via a first video signal line through which a video signal generated by the surveillance camera is transmitted, and a video signal transmitted to the remote control unit. A monitor connected to the remote control unit via a second video signal line to be transmitted, the remote control unit comprising: a plurality of operation keys for adjusting the surveillance camera ; means for generating a key code corresponding to the operated key, means and modulated remote control signal is sent to the first video signal line as the remote operation signal and modulating the generated key code is the second video signal line It includes a filter to prevent be sent, surveillance camera, extracts and demodulates the remote control signal transmitted from the remote control unit via the first video signal line Regulating means, on-screen based on the key code obtained by the demodulation means, performing on-screen display control process
A key obtained by the display control processing means and the demodulation means.
Adjustment means for performing camera adjustment processing based on
The on-screen display control processing means is provided by demodulation means.
Operation guidance for surveillance camera adjustment according to the obtained key code
A method for generating on-screen display data that composes a screen
Column and the generated on-screen display data to the first
A video signal line, a remote control unit and a second video signal line;
Generated on-screen table for sending to monitor via
Sending the display data as a video signal to the first video signal line
A surveillance camera remote control device comprising a step.