JP3177412B2 - Surveillance image recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring image recording / reproducing apparatus for inputting and recording an image signal from a camera for capturing an image of a monitored area, and reproducing the image signal.

[0002]

2. Description of the Related Art A photographed image signal from a camera installed at a monitoring target location is input, the input signal is recorded on a recording medium, and the photographed image is displayed as necessary, so as to be used in a store, office,
2. Description of the Related Art There is a monitoring image recording / reproducing apparatus that monitors various places such as a house to ensure safety. Such a monitoring image recording / reproducing apparatus is used for monitoring the inside of a store at a financial institution or a convenience store, for monitoring a cash dispenser, for monitoring a passenger at a railway institution, and for monitoring at a toll payment point on an expressway. It is used for various purposes in modern society, such as for monitoring of visitors and suspicious persons at the entrance of an apartment house.

In this type of monitoring image recording / reproducing apparatus, a system using a hard disk is being used instead of a conventional time-lapse VCR. A system using this hard disk has less image degradation in recording due to frequent access compared to a time-lapse VCR,
It is excellent in that the head is not worn out when used for a long time, and the operation is simple due to a GUI (graphical user interface).

[0004]

In such a monitoring image recording / reproducing apparatus, an image signal from a camera is recorded on a hard disk, and the recorded image signal is reproduced as necessary. The monitoring image is displayed on the monitor. However, in the conventional system, since the status data indicating the status where the image signal was obtained (shooting location, shooting conditions of the camera, etc.) is not recorded, the monitor can display the playback image. When observing, it is necessary to look at the material in which the situation at the time of recording or the like is written, which is inconvenient for the observer.

[0005] The present invention has been made in view of such circumstances, and by recording situation information indicating the situation when the image signal was obtained together with the image signal, it is possible to record the situation information when reproducing the image signal. It is an object of the present invention to provide a monitoring image recording / reproducing apparatus which can reproduce and display status information at the same time and can improve the convenience of a monitor.

[0006]

According to the present invention, there is provided a monitoring image recording / reproducing apparatus for recording an image signal from a camera for picking up an area to be monitored and reproducing the recorded image signal. , Where the image signal is recorded
1 Recording medium, the photographing situation when the recorded image signal was obtained
A second recording medium on which information is recorded, and
It is characterized by comprising recording means having information input means, and reproducing means for reproducing the recorded information on the shooting condition together with the image signal.

In the surveillance image recording / reproducing apparatus of the present invention, the image signal and the status information when the image signal was obtained are recorded on the hard disk, and when the image signal is reproduced, the status information is reproduced at the same time. The status information is displayed in such a manner as to be superimposed on an image corresponding to the image signal. In this way, the observer can recognize various pieces of status information at a glance, and there is no need to search recorded materials, and the operability of the monitor image recording / reproducing apparatus for the observer is improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below.

FIG. 1 is a schematic diagram showing an overall configuration using a security image recording / reproducing apparatus of the present invention. In FIG. 1, reference numerals 1a, 1b, and 1c denote three cameras installed at locations to be monitored. Each of the cameras 1a, 1b, and 1c automatically captures an image and outputs the obtained image signal to the recording / reproducing device 2. The recording / reproducing apparatus 2 records the input image signal on a built-in hard disk, and reproduces the image signal as necessary, and outputs it to the monitor 3. The monitor 3 displays an image according to the image signal. The processing operation in the recording / reproducing device 2 is controlled by the user with the mouse 4.

FIG. 2 shows the recording / reproducing apparatus 2 shown in FIG.
FIG. 2 is a block diagram showing an internal configuration of the device. Recording / reproducing device 2
Is a camera selector for switching the input analog image signal from each of the cameras 1a, 1b, 1c and converting it into a digital image signal.
An A / D converter 21, a V-RAM 22 for temporarily storing a digital image signal, a compression / expansion unit 23 for compressing the image signal or expanding the compressed image signal, and recording the compressed image signal. A first magnetic disk 24, a second magnetic disk 25 for recording situation data when an image signal is obtained,
A superimposing circuit 26 for superimposing the situation data read from the second magnetic disk 25 on the image signal reproduced from the first magnetic disk 24, and a conditioner to input the situation data to be recorded on the second magnetic disk 25 Keyboard 27 and mouse 4,
Camera selection according to instruction input from keyboard 27
A control unit 28 for controlling operation processing of the D conversion unit 21, the compression / decompression unit 23, the first magnetic disk 24, the second magnetic disk 25, and the like;
And a D / A converter 29 for converting the digital data from the superimposing circuit 26 into analog data and outputting the analog data to the monitor 3.

Next, the operation will be described. First, the operation at the time of recording will be described. Image signals from the cameras 1a, 1b, 1c are selected by a camera selection / A / D converter 21 and are digitally converted and temporarily stored in a V-RAM 22. The recording is performed on the first magnetic disk 24. In addition, three cameras 1a, 1b, 1c
The switching of the image signal from is controlled by the control unit 28 according to a recording program set in advance. At this time, in response to an input by the observer using the keyboard 27, status data relating to the image signal (various shooting status data such as a shooting location, weather at the time of shooting, etc.) is displayed together with information for specifying the image signal on the second magnetic disk. Recorded at 25.

Here, the recording program setting will be briefly described. Recording methods include alarm recording and continuous recording. The alarm recording is a method in which a sensor for detecting a specific situation change is provided at a monitoring target location, and an image signal is recorded for a predetermined time after the sensor detects the situation change and issues an alarm. On the other hand, the continuous recording is a method of recording an image signal periodically at fixed time intervals. For example, such as a case where a sensor detects that a user has started operation at a cash dispenser of a financial institution and starts recording an image signal from the alarm generation timing,
An alarm record is set when recording is performed only when a person appears in a specific place, and a continuous record is set when recording continuously in a financial institution store without any incident. The recording program set in this way is also used as the status data in the second
It is recorded on the magnetic disk 25.

Next, the operation at the time of reproduction will be described. After the compressed image signal is reproduced from the first magnetic disk 24, the reproduced compressed image signal is subjected to decompression processing by the compression / decompression unit 23, and the restored image signal is temporarily stored in the V-RAM 22. Output to the superimposition circuit 26. On the other hand, status data relating to the reproduced image signal is stored in the second magnetic disk 25.
To the superimposition circuit 26 The situation data is superimposed on the image signal reproduced by the superimposing circuit 26, and the superimposed image data is converted into analog image data by the D / A converter 29 and output to the monitor 3, and the image is An image corresponding to the data is displayed.

FIG. 3 shows a display example of status data on the monitor 3. FIG. 3 shows a display example when a monitoring camera is installed at the entrance of the gate. The type and date and time of the camera that obtained the image signal are automatically recorded together with the image signal, and this data is not included in the situation data in this example.

In the above-described example, the situation data relating to the image signal is recorded on the second magnetic disk 25 simultaneously with the recording of the image signal. However, in a general surveillance system, a supervisor is resident. In most cases, image signals are automatically recorded on the first magnetic disk 24. Therefore, after the image signals are automatically recorded, it is a matter of course that the monitor may write the status data on each image signal to the second magnetic disk 25 using the keyboard 27.

In the above-described example, the number of cameras installed is three, but this is merely an example, and it goes without saying that the present invention can be applied to any number of cameras.

[0017]

As described above, in the surveillance image recording / reproducing apparatus of the present invention, in addition to the image signal obtained from the surveillance camera, the situation data when the image signal was obtained is recorded. When displaying an image corresponding to the image signal, information indicating the shooting status of the image can also be displayed, so that the observer does not search for a file of the shooting record,
Various necessary related information can be checked instantaneously, and the convenience of the observer can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration using a monitoring image recording / reproducing apparatus of the present invention.

FIG. 2 is a block diagram showing an internal configuration of the recording / reproducing apparatus in FIG.

FIG. 3 is a diagram showing a display example of status data according to the present invention.

[Explanation of symbols]

 1a, 1b, 1c Camera 2 Recording / reproducing device 3 Monitor 4 Mouse 21 Camera selection / A / D converter 22 V-RAM 23 Compression / expansion unit 24 First magnetic disk 25 Second magnetic disk 26 Superimposition circuit 27 Keyboard 28 Control unit 29 D / A converter

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/91-5/956 G08B 13/196 G11B 31/00 541

Claims (1)

(57) [Claims] 1. A surveillance image recording / reproducing apparatus that records an image signal from a camera that captures an image of a monitoring target area and reproduces the recorded image signal.
Information on the recording medium and shooting conditions when the recorded image signal was obtained
Recording medium on which the information is recorded, and information of the photographing situation.
A surveillance image recording / reproducing apparatus , comprising: recording means having information input means; and reproducing means for reproducing recorded shooting state information together with an image signal.