JPH02244477A - Image recording/reproducing device - Google Patents

Abstract

PURPOSE:To suppress a picture recording miss caused by the generation of abnormality to the minimum by providing a means for outputting an abnormality generation warning video signal to television monitor connected to the outside instead of an input video signal at the time when abnormality is generated. CONSTITUTION:When various abnormalities are generated, various signals 16-19 are outputted to a control circuit 7 from an input video signal detecting circuit 8, a video head clogging detecting circuit 9, a motor 10 and a dewing sensor 11, and by the control circuit 7, an abnormality warning signal 20 corresponding to various abnormalities is outputted to a character generator 12. The character generator 12 generates an abnormality generation warning screen corresponding to the respective abnormality contents signified by the abnormality warning signal 20, and outputs it as an abnormality generation warning video signal 22. A changeover switch 13 selects the abnormality generation warning video signal 22 by the control circuit 7, outputs the abnormality generation warning video signal to a television monitor 3, and reflects an abnormality generation warning screen on the television monitor 3. In such a way, a picture recording miss caused by the generation of abnormality is suppressed to the minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an image recording and reproducing apparatus that has a function of notifying the user of the occurrence of an abnormality such as a clogged head or dew condensation that makes recording impossible. be.

2. Description of the Related Art If an abnormality occurs that makes a conventional image recording/reproducing apparatus inoperable as a monitoring system, a mark indicating the content of the abnormality is displayed on the display of the apparatus to inform the monitor.

FIG. 3 is a block diagram schematically showing a conventional monitoring system using a VTR as an image recording and reproducing device.

In the conventional monitoring system configured in this way, the VTR
2. If an abnormality such as clogging or condensation that makes recording impossible occurs, the abnormality is detected by the abnormality detection circuit 8 inside the VTR 2, and the abnormality detection signal 12 that is the output is used to control the control circuit. A marker indicating the contents of the abnormality is displayed on the display section 9 using a display signal 13. In addition,
The recording/reproducing circuit 4 inside the VTR 2 always operates to output the input video signal 1° inputted from the Pikeo camera 1 as the output video signal 11 as long as the recording operation is in progress.

Problems to be Solved by the Invention However, with the above-mentioned conventional configuration, as long as the head of the VTR 2 is clogged, dew condensation, etc. cannot be recorded, it is impossible to detect any abnormality in the VTR 2.

Furthermore, in surveillance systems, the VTR 2 is often installed in a different location from where the supervisor is, and even if a mark indicating an abnormality is displayed on the display section 9, it is practically impossible to visually recognize it. ing.

For this reason, the supervisor either does not know about the abnormal state of the VTR 2 in which recording is not possible, or only learns about it after a considerable delay after the actual occurrence of the abnormality, and cannot take immediate action to deal with the abnormality of the VTR 2.

The present invention solves these conventional problems, and allows the supervisor to immediately know of an abnormality in the image recording and reproducing device, such as when the image recording and reproducing device cannot record, and display the warning screen. For example, if the head is clogged υ, measures such as cleaning the head can be taken immediately, and recording errors due to abnormalities in the image recording/reproducing apparatus can be minimized.

Means for Solving the Problems The image recording and reproducing apparatus of the present invention prevents head clogging and condensation.
means for detecting an abnormality that makes recording impossible, such as, means for creating an abnormality occurrence warning video signal corresponding to the abnormality detected based on the output signal of the detection means, and a video signal input from a connected video camera, etc. means for switching between an input video signal and the abnormality occurrence warning video signal; and means for switching between the input video signal and the abnormality occurrence warning video signal.

Effect: With the above-described configuration, the present invention detects an abnormality such as head clogging or dew condensation that prevents recording from occurring in the image recording/reproducing device, and receives input from an external device such as a video camera. Instead of the input video signal, an abnormality occurrence warning video signal corresponding to the content of the abnormality can be output to the connected television monitor.

Therefore, for users who are unable to see the display of the image recording and reproducing device because the image recording and reproducing device and the television monitor are installed far apart, and who are looking only at the television monitor, we will explain the abnormality of the device and its cause. This allows the user to be reliably informed of the abnormality and to take immediate action to deal with the abnormality.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a surveillance system having the image recording and reproducing device of the present invention as its core.Like the conventional surveillance system, it is composed of a video camera 11, a VTR 2 which is an image recording and reproducing device, a television monitor 3, and a video camera 1. The video taken by the camera is recorded on a VTR 2 and displayed on a television monitor 3.

The internal configuration of the VTR 2, which is an image recording and reproducing device, will be explained below. 4 is a recording/reproducing circuit which records an input video signal 14 inputted from the video camera 1 onto the magnetic tape 6 using the video head 6, or reproduces a signal recorded on the magnetic tape 6. Reference numeral 8 denotes an input video signal detection circuit that detects the presence or absence of a synchronization signal of the input video signal 14 and outputs an input video signal detection signal 16. Reference numeral 9 denotes a video recorder that detects the video head's blindness by detecting the playback output level of the video head between frames recorded in frame-by-frame recording, and outputs the video head's blindness signal 17. This is a head blockage detection circuit. A dew condensation sensor 11 detects dew condensation and outputs a dew condensation signal 19.

A motor 1o outputs an FG pulse as a motor lock signal 18, thereby also functioning as a detection circuit for detecting the stoppage of the motor 10. 7 is a control circuit that receives an input video signal detection signal 16. Video head blinking and other signals 17. Motor lock signal 18. Various abnormalities are detected based on the dew condensation signal 19, and an abnormality warning signal 2Q corresponding to each abnormality is output. 12 is a character generator, and abnormality warning signal 2
o is input and an abnormality occurrence warning video signal 22 is outputted, and an abnormality occurrence warning screen is created. 13
is a changeover switch operated under the control of the control circuit 7, and is used to select either the input video signal 14 outputted as the output video signal 15 from the recording/reproducing circuit 4 or the abnormality occurrence warning video signal 22.

The operation will be explained below. First, under normal conditions, the input video signal 14 input from the television camera 1 is recorded on the magnetic tape 6 by the video head 6, and the input video signal 13 is directly output from the recording/reproducing circuit 4 as an output video signal 16.
It is output to the television monitor 3 as . At this time, the changeover switch 13 selects the output video signal 15.

Next, when various abnormalities occur, the input video signal detection circuit 8. Video head clogging detection circuit 9° motor 10. The dew condensation sensor 11 outputs various signals 16 to 19 to the control circuit 7, and the control circuit 7 outputs an abnormality warning signal 2o corresponding to various abnormalities to the character generator 12. The character generator 12 creates an abnormality occurrence warning screen corresponding to each abnormality content indicated by the abnormality warning signal 2o,
It is output as an abnormality occurrence warning video signal 22. At this time,
The changeover switch 13 selects the abnormality occurrence warning video signal 22 by the control circuit 7 and outputs the abnormality occurrence warning video signal 22 to the television monitor 3. Then, on TV monitor 3, there is a second
An abnormality warning screen as shown in the figure will be displayed.

As described above, according to this embodiment, when a VTR is used for monitoring, abnormalities that occur during operation are detected and displayed on the TV monitor instead of being displayed on the display of the VTR as in the past. By displaying the information on the screen, the monitor cannot see the display because the VTR is installed far away.
Even if you are unaware that an abnormality has occurred with the VTR and recording is no longer possible, you can ensure that the person monitoring the TV monitor screen is notified.
The supervisor can immediately take action on the abnormality.

Although a VTR is used as the image recording and reproducing device in this embodiment, the same effect can be obtained by using the VTR as a recordable disc player.

Further, in this embodiment, the abnormality occurrence warning screen only shows the details of the abnormality, that is, the reason why the image recording/reproducing apparatus is unable to record, but it would be very convenient for the user if a countermeasure for the problem was also shown.

Effects of the Invention As described above, according to the present invention, when an image recording/reproducing device is unable to record due to head clogging, dew condensation, etc., this abnormality is detected and an abnormality occurrence warning video signal is input to the input video signal. Since the configuration is such that the output is output to the connected TV monitor instead, a warning screen indicating various abnormalities configured by the abnormality occurrence warning video signal can be displayed on the TV monitor. With IP, it is possible to immediately take measures against abnormalities, such as cleaning the head, so recording errors due to abnormalities in the image recording/reproducing apparatus can be minimized, and its practical effects are great.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a monitoring system using a VTR as the core according to an embodiment of the present invention, Fig. 2 is a screen diagram showing an example of an abnormality warning screen, and Fig. 3 is a conventional monitoring system using a VTR as the core. FIG. 1 is a block diagram showing an outline of the system. 4...Recording/reproducing circuit, 7...Control circuit, 8...Input video signal detection circuit, 9...Video head blockage detection circuit, 10... ···motor,
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Claims (1)

[Claims] A means for inputting a video signal from an external device such as a video camera, a means for detecting an abnormality such as head clogging or condensation that makes recording impossible, and a means for responding to an abnormality detected by the output signal of the abnormality detecting means. The apparatus includes means for creating an abnormality occurrence warning video signal, and means for switching between the input video signal and the abnormality occurrence warning video signal, and connects the abnormality occurrence warning video signal to the outside in place of the input video signal when an abnormality occurs. 1. An image recording and reproducing device characterized by comprising means for outputting to a television monitor.