KR20020078651A - Time lapse record/play apparatus and recording control method thereof - Google Patents

Abstract

PURPOSE: A time lapse apparatus for recording and reproducing, a method for controlling recording are provided to adjust record selection rate to a video signal input by the camera according to an abnormality signal, thereby prevent the important moment from missing in even case that an abnormality is generated and sensed. CONSTITUTION: A time lapse apparatus for recording and reproducing(10) includes abnormality detecting parts(25-28) correspondingly installed at least one or more cameras(21-24) for detecting an abnormality of a monitoring area of the camera, a recording part(35) recording video signals on a record medium with differentiating the record by the camera according to an abnormal signal input from the abnormality detecting part, a buffer memory(32) temporarily saving the video signal input by each camera during a predetermined time, a video signal selecting part(33) selectively outputting the video signals by the camera saved at the buffer memory to the recording part according to the abnormality signal.

Description

Time-lapse record / play apparatus and recording control method

The present invention relates to a time-lapse recording and reproducing apparatus, and more particularly, to a time-lapse recording and reproducing apparatus for controlling the recording rate of a video signal for each camera according to a change in a surveillance environment, and a control method thereof.

The time-lapse recording and reproducing apparatus is a recording and reproducing apparatus that is widely used in places where security or surveillance is required such as banks, post offices, and convenience stores.

In general, a time-lapse recording and reproducing apparatus is used with a plurality of cameras and monitors.

Each of the plurality of cameras is installed in a place where surveillance is required, and outputs the captured video signal to the time-lapse recording apparatus. The monitor displays images captured by a plurality of cameras.

Conventional time-lapse recording and reproducing apparatus records images received from a plurality of cameras on a tape by a predetermined amount for each camera according to a set sequence number. Therefore, the video input from each camera is intermittently recorded instead of being recorded continuously.

FIG. 1A is a diagram illustrating video signals input from a plurality of cameras, and FIG. 1B is a diagram illustrating that a data signal selected according to a conventional time-lapse recording method is recorded on a tape with respect to an input video signal as shown in FIG. 1A. .

Referring to the drawing, the first frame of camera 1, the second frame of camera 2, the third frame of camera 3, and the fourth frame of camera 4 are sequentially recorded on the tape, and again the fifth frame of camera 1 and the sixth frame of camera 2 In the order of the seventh frame of camera 3 and the eighth frame of camera 4.

However, since the conventional time-lapse recording method records a predetermined amount of video signals for each camera sequentially, there is a disadvantage in that the recording rate cannot be adjusted according to the change in the surveillance environment and the importance of the monitoring information for each camera.

That is, the conventional time-lapse recording method has a problem in that it is not possible to continuously record the imaging information captured by a specific camera.

Accordingly, an object of the present invention is to provide a time-lapse recording and reproducing apparatus capable of varying a recording rate for each camera according to a change in monitoring environment, and a control method thereof.

1A is a view showing a video signal recorded in a buffer memory of a time-lapse recording and reproducing apparatus;

Fig. 1B is a diagram showing a tape on which a video signal input in a conventional time-lapse recording and reproducing apparatus is recorded;

Figure 2 is a block diagram of a system equipped with a time-lapse playback apparatus according to a preferred embodiment of the present invention,

3 is a view showing an example of data recorded by a recording unit selected by the time-lapse recording and reproducing apparatus of FIG. 2 with respect to a video signal input as shown in FIG. 1A;

4 is a view showing another example of data selected by the time-lapse recording and reproducing apparatus of FIG. 2 and recorded by the recording unit with respect to a video signal input as shown in FIG. 1A; and

5 is a flowchart of a recording control method of the time-lapse recording and reproducing apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

21 to 24: camera 40: monitor

10: time-lapse recording and playback apparatus 31: input unit

32: buffer memory 33: video signal selector

34: output unit 35: recording unit

In order to achieve the above object, a time-lapse recording and reproducing apparatus for selectively recording a video signal input from a plurality of cameras installed in a predetermined position on a recording medium, which is installed corresponding to at least one of the cameras And an abnormality detection unit for detecting an abnormality in the surveillance area; and a recording unit for recording processing on a recording medium by different camera-specific recording of video signals input from the cameras according to the abnormal signal input from the abnormality detection unit. A time lapse recording and reproducing apparatus is provided.

The time-lapse recording and reproducing apparatus may further include a buffer memory for temporarily storing a video signal input for each camera for a predetermined time; and a video signal for each camera stored in the buffer memory according to the abnormal signal input from the abnormality detecting unit. And a video signal selector for selectively outputting to the recording unit.

When there is one camera corresponding to the input abnormal signal, the video signal selector may continuously output only a signal input from the camera corresponding to the abnormal signal to the recording unit.

When there are a plurality of cameras corresponding to the input abnormal signal, the video signal selector may sequentially output signals input from the cameras corresponding to the abnormal signal to the recording unit in a predetermined amount.

In order to achieve the above object, a recording control method of a time-lapse recording and reproducing apparatus for selectively recording a video signal input from a plurality of cameras installed at a predetermined position on a recording medium, the abnormal signal for the surveillance region of the camera Determining whether is input; And if it is determined that an abnormal signal is input, recording a recording process on a recording medium by differently recording camera-specific recording of video signals input from the cameras according to the input abnormal signal. A recording control method of a playback apparatus is provided.

Next, a time-lapse recording and reproducing apparatus and a recording control method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

2 is a block diagram showing a time lapse recording and reproducing apparatus according to a preferred embodiment of the present invention.

The time-lapse recording and reproducing apparatus 10 includes a plurality of sensors 21 to 24 and a recording / reproducing apparatus 30 installed corresponding to the plurality of cameras 21 to 24.

The plurality of cameras 21 to 24 are respectively installed where monitoring is required. Here, the camera is preferably a surveillance camera such as CCTV. If a web camera capable of transmitting an image signal captured through the Internet is used, the recorder / player is connected to a web camera via the Internet so as to receive a video signal from the web camera, and a communication device for internet communication. Is provided.

The plurality of sensors 25 to 28 are applied as abnormal detection units, and the cameras 21 to 24 may detect an abnormality of an object or a target area (for example, a place, a door, an object, etc.) photographed by the camera. It is installed correspondingly. Sensors 25 to 28 output abnormal signals corresponding to the presence or absence of an object.

Such a sensor may be moved from a location where an object is installed, or may be applied to detect an invasion of an outsider into the target area. For example, various sensors known in accordance with a sensing environment, such as an interference sensor installed in the door to detect the opening and closing of the door, and an acoustic detection sensor for detecting the generated sound signal, may be applied.

The recorder / player 30 includes an input unit 31, a buffer memory 32, a video signal selector 33, an output unit 34, and a recording unit 35.

The input unit 31 receives video signals from a plurality of cameras, respectively, and outputs the video signals to the buffer memory 32.

The buffer memory 32 temporarily stores a video signal input for each camera through the input unit 31 for a predetermined time. The buffer memory 32 uses one memory by dividing the storage area as many as the number corresponding to the camera, or comprises a plurality of the memory corresponding to the camera so that the video signals input by each camera can be classified and stored temporarily. Can be.

The recording unit 35 records the video signal input from the buffer memory 32 controlled by the video signal selecting unit 33 on a recording medium such as a tape.

The video signal selector 33 controls the buffer memory 32 to selectively output the video signal for each camera stored in the buffer memory 32 to the recording unit 35 according to the signal input from the abnormality detector 20. .

When the video signal selector 33 selects a video signal for each camera according to the signals input from the sensors 25 to 28, the video signal selector 13 is input from the camera corresponding to the sensor where the abnormal signal is generated. It can be set to control the buffer memory 32 so that only the signal can be recorded in the recording section 35 continuously for a predetermined time.

For example, when an abnormal signal is input from the sensor 26 installed on the object to be shot by the camera 2 22, the video signal selector 33 selects the camera 2 (from the video signal stored in the buffer memory 32). The buffer memory 32 is controlled so that only the video signal corresponding to 22 is output to the recording unit 35.

Then, when video signals from the plurality of cameras are input to the buffer memory 32 as shown in FIG. 1A, the recording unit 35 records only the video signals input from the camera 2 22 on the tape as shown in FIG. 3.

That is, the first frame, the second frame, the third frame, the fourth frame,. As described above, the video signal photographed by the camera 2 22 is continuously recorded on the tape.

On the other hand, when the abnormal signal is input from a plurality of sensors, the video signal selector 33 buffers the signals input from the cameras corresponding to the sensors sequentially by the recording amount set by the recording unit 35. 32 to select signals.

For example, when an abnormal signal is input from the sensors 25 and 27 installed on the object to be photographed by the camera 1 21 and the camera 3 23, the video signal selector 33 enters the buffer memory 32. The buffer memory 32 is controlled to alternately output the video signals corresponding to the camera 1 21 and the camera 3 23 among the stored video signals to the recording unit 35 alternately.

The recording unit 35 records the video signal output from the buffer memory 32 on the tape.

At this time, the images input from the cameras are sequentially recorded on the tape by a time interval and a coding interval according to a specific mode.

FIG. 4 is a diagram showing another example of data selected by the time-lapse recording / reproducing apparatus of FIG. 2 and recorded by the recording unit with respect to the video signal input as shown in FIG. 1A.

If 120 frames are set to be recorded, the first frame, second frame,. , After the 120th frame is recorded, the first frame, the second frame,. The 120th frame is recorded. The video signal corresponding to the camera 1 21 and the camera 3 23 is repeatedly recorded 120 frames until another abnormal signal is input.

The output unit 34 outputs a signal input from the buffer memory 32 to the monitor.

The monitor 40 displays the video signal input through the output unit 34. At this time, the monitor 40 is installed by the number corresponding to the number of cameras, or one monitor is divided by the number of cameras to display the images taken by each camera.

5 is a flowchart of a recording control method of the time-lapse recording and reproducing apparatus according to the present invention.

In the recording / reproducing apparatus 30, a plurality of recording modes corresponding to the presence of an abnormal signal input are set in advance. The recording interval and the coding interval of the video signal of the camera corresponding to each recording mode are set.

The input unit 31 receives video signals from a plurality of cameras, respectively (step 102).

The buffer memory 32 stores the input video signal for a predetermined period (step 104).

The video signal selector 33 determines whether an abnormal signal has been input (step 106). At this time, it is determined how many sensors have an abnormal signal input (step 110).

If an abnormal signal is input from one sensor to the video signal selector 33, the video signal selector 33 continuously selects only the signal input from the camera corresponding to the sensor on which the abnormal signal is generated (step 112).

Meanwhile, when an abnormal signal is input from the plurality of sensors to the video signal selector 33, the video signal selector 33 sequentially processes signals input from cameras corresponding to the sensors from which the abnormal signal is generated. (Step 114).

When the abnormal signal is not input, the video signal selector 33 sequentially selects images input from the cameras by a time interval and a coding interval according to a predetermined basic mode (step 116).

Here, the basic mode may be a conventional recording method, that is, a method of sequentially recording a predetermined amount for each camera.

The recording unit 35 records the video signal selected and input by the video signal selecting unit 33 on a recording medium such as a tape (step 118).

The present invention is not limited to the above-described embodiments, and of course, modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Therefore, the scope of the claims in the present invention will not be defined within the scope of the detailed description, but will be limited to the claims below.

According to such a time-lapse recording and reproducing apparatus and a control method thereof, the recording selectivity for the video signal input for each camera can be adjusted according to the abnormal signal, so that an important moment can be prevented when an abnormality occurs or is detected.

Claims (8)

A time-lapse recording and reproducing apparatus for selectively recording a video signal input from a plurality of cameras installed at a predetermined position on a recording medium, An abnormality detection unit installed corresponding to at least one of the cameras and detecting an abnormality of the surveillance area of the camera; and And a recording unit configured to perform recording processing on a recording medium by differently recording camera-specific recording of video signals input from the cameras according to the abnormal signal input from the abnormality detecting unit. The method of claim 1, A buffer memory for temporarily storing a video signal input for each camera for a predetermined time; and And a video signal selection unit for selectively outputting a video signal for each camera stored in the buffer memory to the recording unit according to the abnormal signal inputted from the abnormal detection unit. The method of claim 2, And the video signal selection unit continuously outputs only a signal input from a camera corresponding to the abnormal signal to the recording unit when there is only one camera corresponding to the input abnormal signal. The method of claim 2, The video signal selection unit outputs signals input from the cameras corresponding to the abnormal signal to the recording unit sequentially by a predetermined amount when there are a plurality of cameras corresponding to the input abnormal signal. Device. A recording control method of a time-lapse recording and reproducing apparatus for selectively recording a video signal input from a plurality of cameras installed at a predetermined position on a recording medium, Determining whether an abnormal signal is input to the surveillance region of the camera; and If it is determined that an abnormal signal is input, recording processing on a recording medium by differently recording camera-specific recording of video signals inputted from the cameras according to the input abnormal signal; Method of recording control of the device. The method of claim 5, (a) temporarily storing a video signal input for each camera for a predetermined time; and and (b) selectively outputting the temporarily stored video signal for each camera according to the input abnormal signal to the recording unit. The method of claim 5, wherein step (b) And when there is only one camera corresponding to the input abnormal signal, only a signal input from the camera corresponding to the abnormal signal is continuously output. The method of claim 5, wherein step (b) And a plurality of cameras corresponding to the input abnormal signal, sequentially outputting signals input from the cameras corresponding to the abnormal signal by a predetermined amount.