JPH06105279A - Recording system for vtr for television camera device for monitor - Google Patents

Abstract

PURPOSE:To record the moment of the generation of an alarm by recording the output video of a television camera in a picture memory since the generation of the alarm, and recording the video in a VTR after the VTR is turned to a recording state. CONSTITUTION:A VTR 4 is equipped with a function which records and reproduces the video from a video switcher 3. For example, a picture memory 8 using a semiconductor can record video signals for one screen or the plural screens, and a control 5 can control the video switcher 3, picture memory 8, and VTR 4 by a detection output from sensors 6 and 7. Then, when the signal is supplied from the sensor 6 which detects an abnormality to the control part 5, the control 5 switches the video switcher 3 so that the output video from a television camera 1 corresponding to the sensor 6 can be selected, and records the video in the picture memory 8. At the same time, the control part 5 activates the VTR 4, and the video recorded in the picture memory 8 is recorded in the VTR 4 after the recording preparation of the VTR 4 is ended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video recording system for a VTR used in a surveillance television camera device.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional recording method for recording a monitor image on a VTR in a monitor television camera device is such that a control section 5 receives an alarm signal from a sensor 6 for detecting an abnormality, and a video switcher. In this method, the TV camera 1 corresponding to the sensor 6 that has detected an abnormality in 3 is selected, and at the same time, a recording command is output to the VTR 4, and the video of the selected TV camera 1 is recorded in the VTR 4.

[0003]

The conventional one is the VTR.
There is a time lag until the recording starts, and there is a drawback that the moment of alarm occurrence (abnormal situation occurrence) cannot be recorded. The object of the invention is to eliminate this drawback and to be able to record the moment of alarm occurrence.

[0004]

In order to achieve the above object, the present invention provides an image memory between a video switch and a VTR, and outputs an image output from a television camera selected by the video switch from an alarm occurrence time. After the recording in the memory and the recording of the VTR, the image recorded in the image memory after the alarm is generated is recorded in the VTR.

[0005]

With this method, it is possible to record the output image of the selected TV camera from the moment of alarm occurrence in the VTR.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Reference numerals 1 and 2 are TV cameras, and 6 and 7 are sensors for detecting abnormalities corresponding to the TV cameras 1 and 2, respectively. Reference numeral 3 is a video switching device which switches and selects output video from the TV cameras 1 and 2. Reference numeral 4 is a VTR, which has a function of recording and reproducing the video from the video switching device 3. Reference numeral 8 denotes an image memory using a semiconductor, for example, which is a memory device capable of recording a video signal for one screen or a plurality of screens. 5 is a control unit,
It is a device that controls the video switching device 3, the image memory 8, and the VTR 4 by the detection outputs from the sensors 6 and 7. For example, when a signal is supplied to the control unit 5 from the sensor 6 that has detected an abnormality, the control unit 5 switches the video switching device 3 so as to select the output video of the television camera 1 corresponding to the sensor 6, and the control unit 5 stores it in the image memory 8. Record the video. At the same time, the VTR 4 is activated, and after the recording preparation of the VTR 4 is completed, the video recorded in the image memory 8 is recorded in the VTR 4.

[0007]

According to the present invention, it is possible to record the instant of alarm occurrence in the VTR. When the image memory for the time until the rise of the VTR is used, the image of the image memory is output to the VTR, while the image from the TV camera is newly recorded in the image memory, as a moving image from the moment the alarm occurs, It is also possible to record in a VTR. Further, by using a plurality of image memories, it is possible to record the video of the moments of consecutive alarms generated in the VTR.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a VTR recording system according to the present invention.

FIG. 2 is a system configuration diagram of a conventional VTR recording system.

[Explanation of symbols]

 1, TV camera 3 Video switcher 4 VTR 5 Control unit 6, 7 Sensor 8 Image memory

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Claims (1)

[Claims] 1. A surveillance television camera device for activating a VTR by detecting outputs of various alarms and sensors to record video signals of a corresponding television camera, wherein an image memory is used between the television camera and the VTR. A VTR recording method in a surveillance TV camera device, characterized in that an image when an alarm is generated is recorded in the VTR.