KR101141754B1 - Multi screen display apparatus and method thereof - Google Patents

Abstract

PURPOSE: A multi screen dividing device and a method thereof are provided to use the existing display chip design structure without change, thereby reducing development time and cost and easily extending channels. CONSTITUTION: An image input unit(110) generates an image signal by channel. A display region of the entire image includes one or more input image signals of n channels. An image output unit(120) forms the entire image by receiving the image signal by channel and output the entire image to an image display unit The image output unit includes the entire image by using the image signal by channel.

Description

[0001] MULTI SCREEN DISPLAY APPARATUS AND METHOD THEREOF [0002]

The present invention relates to a multi-screen dividing apparatus and method, and more particularly, to a multi-screen dividing apparatus and method for dividing a multi-screen dividing apparatus and method, And more particularly, to a multi-screen dividing apparatus and method for reducing distortion of a screen ratio without major change of an existing configuration in case of inconsistency in aspect ratio distortion.

A conventional DVR (Digital Video Recorder) is a device for recording 4, 8, and 16 channels and storing, searching, and transmitting to the network. It is the core of video surveillance equipment, but supports only limited video input channels.

Such a DVR is a security system that connects a video camera such as a video camera or a CCD camera to each channel, compresses and stores the captured image, and is widely used in banks, shopping malls, and the home.

The surveillance system is configured to install a plurality of cameras in order to further improve its security capability, to compress and process the video signals transmitted from a plurality of cameras, to store and display the video signals, and is widely used as a commercialized product.

At this time, the surveillance system is connected to a video display device such as a monitor or a TV so that an image transmitted from a camera of each channel on one screen of the video display device is displayed on each corresponding divisional area on the screen to be simultaneously displayed to a surveillant .

FIG. 1 is a diagram illustrating a configuration of a conventional multi-screen dividing device for dividing the screen.

1, the multi-screen dividing apparatus 50 includes an image collecting unit 51 for collecting image signals input from a camera 10 having a plurality of channels and connected to each channel, 51) for converting the respective image signals collected from the digital video signal into a digital image signal, a decoder (52) for receiving the digital image signal converted from the decoding unit (52) An image processor 53, a scaling unit 54 for upscaling or downscaling the resolution of the entire image data to match the resolution of the image display apparatus, and an output unit 54 for outputting the scaled total image data to the image display apparatus. (55).

Meanwhile, when image data is classified according to image quality and resolution standard, the image quality of commonly used image data is classified into standard definition (SD) and high definition (HD) .

The SD-class image has 640 * 480 pixels, and its aspect ratio is 4: 3.

In addition, the HD (or full HD) image has 1920 * 1080 (or 1366 * 768) pixels, and its aspect ratio is 16: 9.

The resolution of the above SD-class video is set to the resolution of a screen having a 4: 3 aspect ratio, that is, the current analog TV.

On the other hand, the resolution of the HD class image is optimized for a screen having a 16: 9 aspect ratio, that is, an image display device for HD class image reproduction, such as an LCD TV or a monitor, which is currently used.

Therefore, for example, when an SD-class image is reproduced in an HD-class image display device, a distortion of the image ratio during reproduction occurs due to the difference in the aspect ratio.

Currently, in the multi-screen division device of the surveillance system, the video display device at the output stage is rapidly replaced by a monitor or TV having a resolution of HD class.

On the other hand, as the resolution of the input camera increases, the price of the camera increases significantly, and the number of cameras to be replaced is much larger than that of a display device such as a monitor.

For this reason, most of the surveillance systems currently use a multi-screen dividing device, which has an SD-class camera as an input terminal and an HD-class video display device as an output terminal. In such a case, The same phenomenon occurs in the multi-screen dividing device.

Referring again to FIG. 1, in the case of a multi-screen dividing device 50 having an SD-class camera and an HD-class video display device as input / output devices 10 and 20 as shown in the drawing, A rate distortion phenomenon occurs.

In detail, each image having an aspect ratio of 4: 3 input from four SD class cameras (10: 640 * 480) is displayed on an HD monitor (20: 1920 * 1080) having an aspect ratio of 16: (B), the images captured by the respective cameras are reproduced by 960 in the case of reproduction in full screen as shown in (b) due to the difference in aspect ratio between the input / output devices 10, * Will have a resolution of 540.

If the aspect ratio of the original image is calculated as 4: 2.25, the aspect ratio of the original image is significantly different from that of the original image of 4: 3.

In addition, as shown in (a), when the ratio is adjusted in order to prevent the distortion of the picture ratio, the entire screen can not be used, thereby deteriorating the picture quality and wasting the screen space.

Therefore, this aspect ratio distortion is a cause of the inability to precisely grasp an object or an object in the corresponding image due to the nature of the multi-screen division device, which is mainly used for monitoring purposes. And the configured multi-screen dividing device can not avoid such aspect ratio distortion when the resolution is different between the input and output devices.

In other words, the current multi-screen division device is composed of 4 channels, 8 channels and 16 channels, and when the resolution between the input and output devices is the same, the screen ratio of original image of 4: 3 or 16: Channel, 8-channel, and 16-channel. However, when such a channel configuration is applied to a configuration having a different resolution between input and output devices, which are currently used, distortion occurs.

However, in order to correct this, it is necessary to minimize the aspect ratio distortion even when the resolution between the input and output devices is different by changing the number of currently used standardized channels. This is because the structure and design of the multi- A lot of development cost and time are required due to the change of the standard and the redesign of the display chip.

Therefore, it is possible to easily apply the present invention without changing the existing configuration and design while minimizing the aspect ratio distortion between the SD class camera and the HD class image display device in the current multi-screen division device in which the resolution between the input and output devices is used differently A multi-screen dividing apparatus and method are required.

An object of the present invention to overcome the above-mentioned problems is to provide an image display device and a method of controlling the same, And to provide a multi-screen dividing apparatus and method which minimize the occurrence of an aspect ratio distortion phenomenon.

Another object of the present invention is to provide a multi-screen dividing apparatus and method which can be easily applied to the existing product configuration by constructing without changing the display chip designing structure currently used.

According to an aspect of the present invention, there is provided a multi-screen dividing device for dividing a video signal input through one or more cameras into a display area for each channel on a screen of an image display device and simultaneously displaying the divided video signal an image collecting unit for collecting image signals input from the n channels, and a display unit for displaying the entire image including at least one of the n image signals input from the n channels, An image input unit for generating a video signal for each channel divided by a number according to a predetermined reference in a star display area and a video signal for each channel generated from the video input unit having m channels different from n, And an image output unit configured to output the image to the image display device.

Here, n is one of 6, 12, and 20, and m is preferably one of 4, 8, and 16.

The multi-screen dividing device designates the number of video signals constituting the entire image of the image input unit as n, designates the number of display areas for each channel corresponding to the preset reference as m, And a controller for controlling the image output unit to receive the m-channel image signals and configure the entire image.

In addition, it is more preferable that the camera is an SD class camera and the image display device is HD class or higher.

The image output unit may further include a scaling unit for up-scaling or down-scaling the resolution of the entire image to a resolution of the image display apparatus.

According to another aspect of the present invention, there is provided a multi-screen dividing method for dividing a video signal inputted through one or more cameras into a display area for each channel on a screen of a video display device and simultaneously displaying the divided video signal, The method comprising the steps of: collecting image signals input from n channels; displaying a display region of the entire image including at least one of the n image signals input from the n channels, The method comprising the steps of: generating a video signal for each channel divided into a number of channels according to a predetermined reference by a display region for each channel different from the region; receiving a video signal for each channel generated from the video input unit, And outputting the entire image to the image display apparatus.

Here, n is one of 6, 12, and 20, and m is preferably one of 4, 8, and 16.

The multi-screen dividing method may further include a step of assigning the number n of image signals constituting the entire image of the channel-by-channel image signal generating step to n, and setting the number of display areas for each channel corresponding to the predetermined reference to m And controlling the m channels of the image signals to form an entire image.

In addition, the multi-screen dividing method may further comprise up-scaling or down-scaling the resolution of the entire image to match the resolution of the image display device.

In the multi-screen dividing apparatus and method according to an embodiment of the present invention, the division of the display area for each channel between the input and the output in the multi-screen division is divided and divided into two parts, It is possible to view an image having a screen ratio close to the original in the display area for each channel even in the SD class camera and the HD class image display device by minimizing the aspect ratio distortion caused by the mismatch.

The multi-screen dividing apparatus and method according to an embodiment of the present invention can be easily applied to the existing product configuration by constructing without changing the design structure of the display chip currently used, thereby reducing the development cost and time, have.

1 is a diagram illustrating a configuration example of a conventional multi-screen dividing device.
2 is a block diagram of a multi-screen division device according to an embodiment of the present invention;
3 is a first exemplary view of a multi-screen segmentation according to an embodiment of the present invention.
4 is a second exemplary view of a multi-screen segmentation according to an embodiment of the present invention.
FIG. 5 is a third example of a multi-screen division according to an embodiment of the present invention; FIG.
6 is a flowchart of a multi-screen division method according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

FIG. 2 is a configuration diagram of a multi-screen dividing apparatus according to an embodiment of the present invention, and FIGS. 3 to 5 are illustrations of multi-screen division according to an embodiment of the present invention.

Referring to FIG. 2, the multi-screen division device 100 divides a video signal input through one or more cameras 10 into a display area for each channel on the screen of the video display device 20, An apparatus comprising: an image collecting unit (105) for collecting image signals input from n channels; a display unit for displaying a display region of an entire image including at least one of image signals input from the n channels, A video input unit 110 for generating a video signal for each channel divided into a number of channels according to a predetermined reference by a display area for each channel different from the display area and a video input unit 110 having m channels different from the video input unit 110, And an image output unit 120 which receives a star video signal and constructs an entire image through the image signal and outputs the whole image to the image display device 20.

In the present embodiment, a multi-screen dividing device 100 having an SD-class (640 * 480) camera 10 and an HD-class (1920 * 1080) , It can be applied to both of the input and output apparatuses having different resolutions and the multi-screen division apparatus.

Referring to FIG. 2, the image capturing unit 105 collects image signals from six SD cameras 10 as an input device, as shown in the figure.

The image input unit 110 may include a first decoding unit 111, an image segmentation processing unit 112, and a first output unit 113.

The first decoding unit 111 converts each image signal collected from the image collection unit 105 into a digital image signal.

Thereafter, the image segmentation processing unit 112 receives the digital image signal converted from the first decoding unit 111, generates predetermined whole image data using the digital image signal, and outputs it to a number according to a preset reference The output of four channels as shown in the figure).

The first output unit 113 outputs the generated video signals of the four channels to the video output unit 120.

FIG. 3 shows an example in which each of the divided regions corresponding to each channel image signal output to the video output unit 120 is compared with the entire output screen.

Referring to FIG. 3, the image segmentation processor 112 receives 6-channel image signals and divides the image signals into 4 divided display areas.

2, the multi-screen division device 100 includes an external operation unit 140 for receiving a user's channel selection and operation, and a controller 140 for selecting a channel selected by the watcher The number of video signals actually processed by the image processing unit 120 and the number of video signals processed by the video output unit 120 in accordance with the selection and operation of the channel and the number of the external operation unit 140, (130).

That is, when the number of selected cameras is n and the number of actual division processes is m, the controller 130 designates the number of video signals constituting the entire image of the image input unit 110 as n, The number of display areas for each channel to be generated corresponding to the reference is designated as m, and the image output unit 120 controls the image output unit 120 to receive the m-channel image signals and configure the entire image.

The image output unit 120 includes an image processing unit 121 for processing each image signal collected from the first output unit 113 to generate predetermined whole image data, And a second output unit 123 for outputting the output to the apparatus 20.

At this time, the image processing unit 121 of the image output unit 120 may process an analog image signal or process a digital image signal.

Accordingly, when the image processing unit 121 processes an analog image signal, the image input unit 110 processes the analog image signal to be output from the first output unit 113, and the image processing unit 121 And processes the image after decoding the analog video signal.

Alternatively, when the image processing unit 121 processes a digital image signal, the image input unit 110 processes the digital image signal to be output from the first output unit 113, and the image processing unit 121 And processes the image using the digital image signal.

In addition, the image output unit 120 may further include a scaling unit 122 for up-scaling or down-scaling the resolution of the entire image to a resolution of the image display apparatus.

As shown in the figure, when a user (monitor) using the monitoring system using the multi-screen dividing device 100 selects a camera 10 of six channels installed through the external operating unit 140, The controller 130 receives the video signals of the six channels selected by the video input unit 110 and divides the video signals into four display areas for each channel (see FIG. 3) to the video output unit 120 .

Also, at the same time, the control unit 130 controls the image output unit 120 to receive the image signals for the four channels, process the image signals, and configure the entire image.

As a result, the supervisor can actually monitor six channels, and the divided channels 23 for each channel displayed by the channels are 640 * 640 for a 1920 * 1080 HD-class monitor, as shown in FIG. 540, resulting in an aspect ratio of 4: 3.3.

Compared with the existing multi-screen dividing device (when using a 4-channel camera and a HD-level video display device), the division ratio of each channel is 4: 2.25 (see FIG. 1) The distortion of the picture ratio is remarkably reduced, and it is possible to monitor an image close to the original.

That is, when the conventional multi-screen dividing device is composed of 4 channels, 8 channels and 16 channels and outputs it to the HD-class image display device, the screen ratio of each divided display area is 4: 2.25.

It is difficult to use for the purpose of surveillance because the image ratio is distorted more than 4: 3 which is the aspect ratio of the original original image.

However, the multi-screen division device 100 according to an embodiment of the present invention may be configured such that the video output unit 120 processes the 4th, 8th, and 16th channels as it is, ) So that the video input unit 110 preprocesses the input channel by channel and preprocesses the pre-processed video signal for each channel as the input video signal by the video output unit 120 It is possible to easily prevent the distortion of the aspect ratio without changing the existing configuration or modifying the chip design.

Accordingly, the controller 130 determines the number of channels received by the image input unit 110 and the number of channels to be divided according to each channel in consideration of the screen ratio of the camera 10 and the screen ratio of the video display device 20, It is preferable to designate the number of regions and to control the image input unit 110 and the image output unit 120 to process them.

For example, if the camera is an SD-class camera and the image display device is of HD grade or higher, n is one of 6, 12, and 20, and m is one of 4, 8, and 16.

4 illustrates an example in which 12 channels are input, the image input unit 110 divides the input image into 4 channels, and the image output unit 120 divides the divided region into 4 channels, And FIG. 5 shows an example in which 20 channels are received and line-divided into 16 channels to form an entire image.

Referring to FIG. 4A, the image input unit 110 receives 12 channels, divides the channels into 4 channels, and outputs the divided channels to the image output unit 120. The image output unit 120 receives the image signals divided into the four channels, forms a whole image, and outputs the whole image to the image display device 20. [

4B, the divided screen for each channel is 480 * 360, so that the screen ratio is 4: 3, and the screen size of the divided screen is 480 * do.

This is exactly the same as the ratio of the original image, and there is no distortion of the aspect ratio at all.

Referring to FIG. 5A, the image input unit 110 receives 20 channels, divides the channels into 16 channels, and outputs the divided channels to the image output unit 120. FIG. The image output unit 120 receives the image signals divided into the 16 channels and constructs a whole image and outputs the whole image to the image display device 20. [

5B, the divided screen for each channel is 384 * 270, so that the aspect ratio is 4: 2.8 (i.e., 4: 2.8) do.

This is almost the same as the ratio of the original image so that the distortion of the aspect ratio can be minimized and the purpose of the monitoring can be achieved.

If the resolutions of the camera 10 and the video display device 20 are the same or equal to each other in the multi screen division device 100 according to the embodiment of the present invention, ) And the image display device 20 in consideration of the resolution between the n and m.

For example, when the camera 10 and the video display device 20 are in the same SD class or HD class, the controller 130 sets the n and m to 4, 8, and 16 channels, respectively, It is obvious that distortion of the aspect ratio does not occur when the image input unit 110 and the image output unit 120 are controlled.

As described above, in the multi-screen division device according to the embodiment of the present invention, the division of the display area for each channel between the input and the output in the multi-screen division is line-divided and then double-controlled internally so that the resolution level and the screen ratio It is possible to minimize an aspect ratio distortion caused by a mismatch, and it is possible to view an image having a screen ratio close to the original in a display area for each channel even in an SD class camera and an HD class image display device.

In addition, since the multi-screen dividing device can be easily applied to the existing product configuration without changing the design structure of the display chip currently used, the development cost and time can be reduced. In addition, It is very easy to apply from 16 channels to 6 channels, 12 channels and 20 channels.

FIG. 6 is a flowchart of a multi-screen division method according to an embodiment of the present invention.

Referring to FIG. 6, the multi-screen dividing method divides a video signal inputted through one or more cameras into a display area for each channel on a screen of a video display device and simultaneously displays the video signal, (S610), the display region of the entire image including at least one of the image signals input from the n channels is divided into the display regions of the n channels by different channels (S620, S630, S640) of generating a video signal for each channel divided by a number according to a predetermined reference in a display area, and receiving a video signal for each channel having m channels different from the channel and generated from the video input unit (S650) and (S660) outputting the entire image to the image display device.

In this case, n is one of 6, 12, and 20, and m may be one of 4, 8, and 16.

In addition, the multi-screen dividing method may further include a step of assigning the number n of image signals constituting the entire image of the per-channel image signal generating step S620, S630, and S640 to n, And controlling the number of the display areas to be m and to configure the entire image by receiving the video signals of the m channels.

In addition, the multi-screen dividing method may further comprise up-scaling or down-scaling the resolution of the entire image to match the resolution of the image display device.

The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. However, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. .

10: camera 20: monitor (video display device)
100: Multi-screen dividing device 105:
110: video input unit 111: first decoding unit
112: image division processing unit 113: first output unit
120: video output unit 121: video processing unit
122: scaling unit 123: second output unit
130: control unit 140: external control unit

Claims (9)

A multi-screen dividing device for dividing a video signal input through one or more cameras into a display area for each channel on a screen of a video display device and simultaneously displaying the divided video signals,
an image collecting unit for collecting image signals input from the n channels;
Wherein the display region of the entire image including at least one of the image signals input from the n channels is divided into a number of display regions for each of the n channels, A video input unit for generating a signal; And
And an image output unit having m channels different from the n and configured to receive an image signal for each channel generated from the image input unit, to construct an entire image through the channel and output the image to the image display device,
Wherein n is one of 6, 12, and 20, and m is one of 4, 8, and 16.
delete The method according to claim 1,
Designating the number of video signals constituting the entire image of the image input unit as n and designating the number of display areas for each channel corresponding to the predetermined reference as m, And a controller for receiving the video signal for each channel and controlling the overall picture to be formed.
The method according to claim 1,
Wherein the camera is an SD class camera, and the image display device is HD grade or higher.
The apparatus of claim 1, wherein the image output unit
And a scaling unit for up-scaling or down-scaling the resolution of the entire image to match the resolution of the image display apparatus.
A multi-screen dividing method of a multi-screen dividing device for dividing a video signal input through one or more cameras into a display area for each channel on a screen of a video display device and simultaneously displaying the same,
a) collecting image signals input from n channels;
(b) a display area of the entire image including at least one of the image signals input from the n channels is divided into a number of display areas for each of the n channels, Generating a star video signal; And
c) receiving the image signals for each channel generated from the image input unit having m channels different from the n, and constructing an entire image through the channels to output to the image display device,
Wherein n is one of 6, 12, and 20, and m is one of 4, 8, and 16.
delete The method according to claim 6,
Designating the number of video signals constituting the entire image in step b) as the number n, designating the number of display areas for each channel corresponding to the preset reference as m, Receiving a signal and controlling the entire image to be composed.
The method according to claim 6,
And upscaling or downscaling the resolution of the entire image to match the resolution of the image display device.

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