JPH1155621A - Video changeover recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record the same image as that stored in a hard disk drive HDD or the like, a video image switched in an optional timing, or a compressed video image onto a recording medium such as HDD and to record the image on other recorder as backup recording in a monitor system that records a video image while switching any of a plurality of cameras. SOLUTION: The system is provided with a plurality of entry means 1, video changeover means 3, 6, 11, storage means 4, 7, 12, a companding means 8 and a recording medium 9, a changeover timing means 10 and a video output means 13 connect to a video recorder 14 and a video output means 5 connects to a monitor 15. Then a video image obtained by switching any of a plurality of cameras is recorded on the recording medium 9 and recorded on the recorder 14 as backup recording.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium in a video switching recording / reproducing apparatus or an external hard disk drive (hereinafter referred to as an HDD) while switching video data from a plurality of surveillance cameras at an arbitrary timing. The present invention relates to a video switching recording / playback apparatus for recording on a recording medium. At substantially the same time as recording, the same video as the video recorded on the HDD or the like, a video switched at another arbitrary timing, or a compressed video is output, and this is output to another HD.
The present invention relates to a video switching recording / reproducing apparatus which records on a recording medium such as D and simultaneously enables backup recording on another recording apparatus.

[0002]

2. Description of the Related Art A monitoring recording apparatus using a hard disk drive called a hard disk drive recorder (hereinafter, referred to as an HDD recorder) has a plurality of video input terminals, and compresses a plurality of input video data while switching them. To record on the HDD. Further, the video data switched by the separately provided video switching device is compressed and recorded on a recording medium such as an HDD.

When digitally recording a large amount of video data, it is usually compressed and recorded. When the recorded video data is to be stored for a long period of time, the compressed video data recorded on the HDD or the like is reproduced once, and is recorded over a long time in a magnetic recording device called a streamer that can record for a long time.

In order to confirm a long-term stored video, the compressed video data recorded in the streamer is reproduced, recorded again in the HDD recorder, and the compressed video data is decompressed using the HDD recorder. Check.

Further, when confirming the video already recorded in the HDD, the recording of the current video data on the HDD is stopped, and the video already recorded in the HDD is confirmed.

[0006]

However, in the above-mentioned conventional HDD recorder, when an image is stored, once H
The compressed video data recorded on the DD must be reproduced and re-recorded in the streamer over time.

[0007] When confirming the stored video, the compressed video data recorded in the streamer is played back.
There is a problem that it is necessary to re-record on the HDD recorder and expand the compressed video data using the HDD recorder to check the video.

Further, there is another problem that during compression recording on an HDD or the like, it is not possible to confirm a video already recorded in the HDD.

The present invention solves the above-mentioned problem, and compresses and switches a video switched at an arbitrary timing to a video switching recording / reproducing apparatus or a recording medium such as an external HDD, and simultaneously stores the compressed video in another external recording apparatus. The same image as the image recorded on the HDD or the like or an image switched at an arbitrary timing can be recorded. Also, the video switched at an arbitrary timing can be confirmed on a monitor or the like separately provided outside.

[0010] Furthermore, another external recording device, originally HD
A video switching recording / reproducing apparatus capable of confirming a video already compressed and recorded in an HDD or the like while performing backup recording for recording a video to be recorded in D or a video switched at an arbitrary timing. Aim.

[0011]

According to a first aspect of the present invention, there is provided a video switching recording / reproducing apparatus, comprising: a plurality of video input means; a timing control means for controlling any two timings for switching video from the video input means; Two video switching means, a first video switching means and a second video switching means for switching the video according to a timing signal from the timing control means, and a first video switching means for sequentially storing the video switched by the first video switching means. Storage means for sequentially storing the images switched by the second image switching means, first video output means for outputting a video output of the first storage means, and second storage means. Compression / expansion means for compressing the video of the storage means, a storage medium for storing the compressed video,
Switching timing input means for inputting a video switching timing from the outside, third video switching means for switching the video from the plurality of video input means in accordance with the switching timing signal, and video switched by the third video switching means And a second video output means for outputting the video of the third storage means, wherein the compression / decompression means decompresses the video recorded by compression on the recording medium. The video output means outputs the video image sequentially from the first or second storage means.

According to a second aspect of the present invention, there is provided a video switching recording / playback apparatus, comprising: a plurality of video input means; a timing control means for controlling an arbitrary timing for switching the video from the video input means; and a timing signal from the timing control means. First video switching means for switching the video according to the following, switching timing input means for inputting an external video switching timing signal, second video switching means for switching the video according to the switching timing signal, and first video switching means. First storage means for sequentially storing the switched video;
A second storage unit that sequentially stores the images switched by the second image switching unit; a first image output unit that outputs the image of the first storage unit; and an image that is output by the second storage unit. A second video output unit, a compression / expansion unit for compressing the video in the second storage unit, and a storage medium for storing the compressed video, wherein the compression / expansion unit compresses and records the data on the recording medium. Expands the displayed image and converts the first or second
And the video output means outputs the video sequentially.

According to a third aspect of the present invention, there is provided a video switching recording and reproducing apparatus according to the first aspect, wherein the video compressed by the compression / expansion means for compressing the video in the second storage means is compressed between an external device. Digital input / output means for inputting / outputting the received digital signal, a compression means, and a digital output unit.

According to a fourth aspect of the present invention, there is provided the video switching recording / reproducing apparatus according to the second aspect, wherein the video compressed by the second video output means and the compression / expansion means for compressing the video in the second storage means is provided. It is provided with two digital input / output means for inputting / outputting a digital signal compressed with an external device.

According to a fifth aspect of the present invention, there is provided a video switching recording / reproducing apparatus according to the first, second, third and fourth aspects, further comprising a second timing control means.

The video switching recording / reproducing apparatus having the above configuration records video from several monitoring cameras or the like at an arbitrary timing while recording the video on an internal recording medium or a recording medium such as an external hard disk drive (HDD). At the same time, backup recording by another external recording device is possible by outputting the same video as the video recorded on the HDD or the like, video switched at another arbitrary timing, or compressed video to the outside. To Also, it is possible to confirm the video switched at an arbitrary timing on a monitor or the like separately provided outside.

[0017] Furthermore, another external recording device is originally provided with an HDD.
The present invention provides a video switching recording / playback apparatus capable of confirming a video already compressed and recorded in an HDD while recording a video or the like recorded in the HDD (that is, always performing backup recording).

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG. << First Embodiment >> FIG. 1 is a block diagram of a video switching recording / reproducing apparatus 20 according to a first embodiment of the present invention. In FIG. 1, a plurality of, for example, three video input units 1A, 1B,
Each output terminal of 1C is a first, second, and third video switching unit 3,
6 and 11 are connected to respective input terminals. Video input unit 1
A, 1B, and 1C each include a plurality of monitoring cameras, for example, three cameras.
The video signal of each camera when using the camera is input. When three or more N cameras are used, N input units 1A,
1B, 1C,... 1N, and their video inputs a,
.., n are first to third video switching units 3, 6,.
Input to 11. The timing control unit 2 is connected to the first and second video switching units 3 and 6, and the video input units 1A, 1
The video signals input from B and 1C are switched.

The timing control section 2 supplies two different timing signals to the first video switching section 3 and the second video switching section 6, respectively. The first storage unit 4 is connected to the first video switching unit 3 and sequentially stores the video signals switched by the first video switching unit 3. The first video output unit 5 is connected to the first storage unit 4 and outputs a video signal read from the first storage unit 4. The second video switching unit 6 switches video signals according to the timing signal from the timing control unit 2. The second storage unit 7 is connected to the second video switching unit 6,
The video signals switched by this are sequentially stored. The compression / decompression unit 8 is connected to the second storage unit 7 and is connected to the second storage unit 7.
Compress the video.

The recording medium 9 stores the video compressed by the compression / expansion unit 8. Further, the compression / decompression unit 8 decompresses the video compressed and recorded on the recording medium 9. The switching timing input unit 10 is connected to the external video recording device 14 and inputs a video switching timing signal from the external video recording device 14. The third video switching unit 11 is connected to the switching timing input unit 10 and switches the video signal according to the timing from the switching timing input unit 10. The third storage unit 12 is connected to the third video switching unit 11 and sequentially stores video signals switched by the third video switching unit 11. The second video output unit 13 is connected to the third storage unit 12, and the third storage unit 1
2 is output.

The external video recording device 14 is connected to the second video output unit 13 and records the output video signal. The monitor 15 is connected to the first video output unit 5 and projects a video signal from the first video output unit 5.

FIG. 2 is a timing chart showing the operation in the first embodiment of the present invention. One mountain-shaped figure represents a one-field video input signal. It is assumed that the video inputs a, b, and c are input to the video input units 1A, 1B, and 1C of the video switching device, and that the three input video inputs are synchronized. According to the output of the timing control unit 2, the first video switching unit 3 is switched every 60 fields,
Is switched every four fields. The video switching timing input from the external video recording device 14 to the switching timing input unit 10 is for each field, and shows a case where the third video switching unit 11 is switched for each field.

The operation of the video switching recording / reproducing apparatus of the present embodiment configured as described above will be described with reference to FIGS. FIG. 2 shows an arrangement on the time axis of each field of the video inputs a, b, c and the video signals d, e, f. First, three video input units 1A, 1B, 1
The video inputs a, b, and c input to C are input to the first video switching unit 3, the second video switching unit 6, and the third video switching unit 11. The video signals are switched in the first video switching unit 3 and the second video switching unit 6 according to the switching timing signal from the timing control unit 2. According to the switching timing signal, for example, in the first video switching unit 3, the video input a,
b and c are switched every 60 fields, and the second video switching unit 6 is switched every 4 fields. Therefore, as for the video signal d output from the first video switching unit 3, the video inputs a, b, and c are output in order of 60 fields,
The video signal e of the output of the video switching unit 6 has video inputs a, b,
c is output in order of four fields. The number of fields in which the same video input of the video signals d and e continues is not limited to 60 and 4, but can be selected to any value.

The first storage unit 4 sequentially stores the video signals d switched by the first video switching unit 3, and the first video output unit 5 outputs the video signals read from the first storage unit 4. I do. Therefore, the output of the first video output unit 5 is a video signal in which the video inputs a, b, and c are switched every 60 fields.

The second storage unit 7 sequentially stores the video signals e switched by the second video switching unit 6. The compression / decompression unit 8 compresses the video signal e read from the second storage unit 7, and the recording medium 9 stores the compressed video. That is, the video inputs a, b, and c are switched every four fields, and the compressed video signal e is stored in the recording medium 9. When reproducing the video signal e of the recording medium 9, the compression / decompression unit 8 decompresses the video signal e compressed and recorded on the recording medium 9,
The expanded video signal e is stored in the first storage unit 4. A desired video input among the video inputs a, b, and c included in the video signal e stored in the first storage unit 4, for example, the video input a is selectively read out to the first video output unit 5. Is output to the outside and displayed on the monitor 15.

The switching timing input section 10 inputs a video switching timing signal from the external video recording device 14. The third video switching unit 11 is a switching timing input unit 10
Video input units 1A, 1B, 1 according to the switching timing from
The video inputs a, b, and c from C are switched. That is, since the video switching timing from the external video recording device 14 is every one field, the video signal f output from the third video switching unit 11 is a video whose video inputs a, b and c are switched every one field. Signal.

The third storage unit 12 stores the third video switching unit 11
The second video output unit 13 outputs the video signal read out from the third storage unit 12 while sequentially storing the video signal f switched by the above. Therefore, the output of the second video output unit 13 is a video signal in which the video inputs a, b, and c are switched for each field.

A video signal output from the second video output unit 13 can be recorded on the external video recording device 14.

The video signal from the first video output unit 5 can be displayed on the monitor 15 provided outside as described above. That is, the video input a, b, and c video switched every 60 fields can be displayed on the monitor 13 provided outside.

As described above, according to the video switching apparatus of the present embodiment, the hard disk drive (H) is switched while switching video signals from a plurality of surveillance cameras at any timing.
DD) or the like. And at the same time, H
By outputting the same video as the video recorded on the DD or the like, or a video switched at another arbitrary timing, or a compressed video, backup recording by an external recording device is enabled. The video switched at the timing can be confirmed on a monitor 15 or the like separately provided outside.

Further, another external recording device is originally provided with an HDD.
It is also possible to check the video already compressed and recorded in the HDD while recording the video or the like recorded in the HDD (that is, always recording the backup).

FIG. 3 is a block diagram showing a simplified configuration of the video switching recording / playback apparatus according to the first embodiment of the present invention.

In the configuration shown in FIG. 3, the video signal f of the third video switching unit 11 is used instead of the video signal e of the second video input unit 6 of the video switching recording and reproducing apparatus of the first embodiment shown in FIG. Is input to the second storage unit 7. The video signal from the second storage unit 7 is output from the second video output unit 13. A plurality of video inputs can be recorded on one or two recording media even with a simpler configuration that does not use the second video input unit 6 and the third storage unit 12 in FIG.

<< Second Embodiment >> Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram of a video switching device and a recording / playback device according to a second embodiment of the present invention.

In the second embodiment of the present invention, instead of the storage medium 9 of the video switching recording / playback apparatus of the first embodiment shown in FIG.
A digital input / output unit 9a for inputting / outputting a compressed digital signal is provided. Second video output unit 1
3 includes a compression unit 13a and a digital output unit 13b. The compressed digital signal can be directly input / output to / from an external device.

In the video switching recording / playback apparatus shown in FIG. 3, the second video output unit 13 and the storage for storing the video signal compressed by the compression / expansion unit 8 for compressing the video signal in the second storage unit 7 are stored. Instead of the medium 9, two digital input / output units for inputting / outputting the compressed digital signal may be provided so that the compressed video signal can be directly input / output to / from an external device.

In the first and second embodiments of the present invention, another timing control unit (not shown) is provided in place of the switching timing input unit 10 so that the switching timing signal from the external video recording device 14 is provided. The third video switching unit may be switched even if there is no input. In this embodiment, the HDD is taken as an example of the recording medium.
The same effect can be obtained by using another recording medium such as a D-RAM, a DVD, an MO, and a flash memory.

[0038]

As described above, the video switching recording / reproducing apparatus of the present invention has a timing control for controlling a plurality of video input units and any two timings for switching the video from these video input units. And two video switching units, a first video switching unit and a second video switching unit, which switch the video according to the timing from the timing control unit.
A first storage unit for sequentially storing the images switched by the video switching unit, and a second storage unit for sequentially storing the images switched by the second video switching unit. Further, a first video output unit for outputting the video of the first storage unit, a compression / expansion unit for compressing the video of the second storage unit, a storage medium for storing the compressed video, A switching timing input unit for inputting a video switching timing of
A third video switching unit for switching the video from the plurality of video input units according to the switching timing, a third storage unit for sequentially storing the video switched by the third video switching unit, A second video output unit that outputs a video from the storage unit. The compression / decompression unit decompresses the video recorded by being compressed on the recording medium, and
By sequentially storing the images in the storage unit and outputting the images from the image output unit, the images from several monitoring cameras or the like are switched at an arbitrary timing, and the storage medium or a recording medium such as an external hard disk drive (HDD) is switched. Can be recorded. At the same time, the same video as the video recorded on the HDD or the like, the video switched at another arbitrary timing, or the compressed video is output to the outside, thereby enabling backup recording by an external recording device. Also, it is possible to confirm the video switched at an arbitrary timing on a monitor or the like separately provided outside.

Furthermore, another external recording device is originally provided with an HDD.
It is also possible to check the video recorded in the HDD which has already been compressed and recorded while recording the video and the like recorded in the HDD (that is, always recording the backup). Further, by providing a digital output unit and a digital input / output unit, a digital video signal can be input / output to / from an external device.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video switching device according to a first embodiment of the present invention.

FIG. 2 is a timing chart showing video input and video switching timing of FIG. 1;

FIG. 3 is a block diagram of a video switching device according to another example of the first embodiment of the present invention;

FIG. 4 is a block diagram of a video switching device according to a second embodiment of the present invention.

[Explanation of symbols]

 1A, 1B, 1C Plural video input units 2 Timing control unit 3 First video switching unit 4 First storage unit 5 First video output unit 6 Second video switching unit 7 Second storage unit 8 Compression Decompression unit 9 Storage medium 10 Switching timing input unit 11 Third video switching unit 12 Third storage unit 13 Second video output unit 14 External video storage device 15 External monitor 9a Digital input / output unit 13a Compression unit 13b Digital Output section

Claims (5)

[Claims] 1. A plurality of video input means, a timing control means for controlling any two timings for switching a video from the video input means, and a first video switching means for switching a video according to a timing signal from the timing control means. Two video switching means, a first video switching means and a second video switching means, a first storage means for sequentially storing the video switched by the first video switching means, and a second video switching means. Second storage means for sequentially storing the compressed video, first video output means for outputting the video of the first storage means, compression and decompression means for compressing the video of the second storage means, and the compressed video , A switching timing input means for inputting an external video switching timing, and the plurality of video inputting means according to the switching timing of the switching timing input means. 3rd switching video from force means
Video switching means, a third storage means for sequentially storing the video switched by the third video switching means, and a second video output means for outputting the video of the third storage means, Video switching recording means for expanding and compressing the video recorded by compression on the recording medium, causing the first or second storage means to sequentially store the video, and causing the video output means to output the video. Playback device. 2. A plurality of video input means, a timing control means for controlling a timing for switching a video from the video input means, and a first video switching means for switching a video in accordance with a timing from the timing control means. Switching timing input means for inputting a video switching timing from the outside, second video switching means for switching a video in accordance with the switching timing of the switching timing input means,
A first storage unit for sequentially storing images switched by the first image switching unit, a second storage unit for sequentially storing images switched by the second image switching unit, and a first storage unit. First video output means for outputting a video,
Second video output means for outputting the video of the second storage means, compression / decompression means for compressing the video of the second storage means,
A storage medium for storing the compressed video, wherein the compression / expansion means expands the video compressed and recorded on the recording medium, and sequentially stores the video in the first or second storage means. A video switching recording / playback apparatus characterized by outputting a video from an output means. 3. A digital input / output means for inputting / outputting an image compressed by a compression / expansion means for compressing an image in a second storage means to / from an external device by a compressed digital signal; 2. A video switching recording / reproducing apparatus according to claim 1, further comprising means and a digital output unit, wherein the video from the plurality of video input means is switched and then compressed and output. 4. An image input / output device for inputting / outputting an image compressed by a second image output unit and a compression / expansion unit for compressing an image stored in a second storage unit to / from an external device by a compressed digital signal. 3. The video switching recording / reproducing apparatus according to claim 2, further comprising: two digital input / output units, wherein the video from the plurality of video input units is switched and then compressed and output. 5. The video switching recording / reproducing apparatus according to claim 1, further comprising a second timing control means.