JP2010273107A - Video display controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display controller for obtaining video images suitable for each screen of a plurality of monitors with different aspect ratios from a common video memory. <P>SOLUTION: In the video display controller 12, a frame controller part 121 stores digital video signals from each of A/D converters 11-1 to 11-7 into a frame memory part 122, extracts digital images of multiscreen images from the frame memory part 122 according to an instruction from an operation part 123, constitutes a multiscreen with an aspect ratio of 16:9 and a multiscreen with an aspect ratio of 4:3 in the aspect ratio of 16:9, outputs the multiscreen with the aspect ratio of 16:9 to an HDMI (High Definition Multimedia Interface) signal conversion part, and outputs the multiscreen with the aspect ratio of 4:3 in the aspect ratio of 16:9 to a video reduction part 124. The operation part 123 performs control so that video images equivalent to all or a part of a plurality of digital video signals are extracted from the frame memory part 122 by the frame controller part 121, at a ratio of 16:9 or 4:3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a video display control apparatus suitable for use in a monitoring system.

  The monitoring system generally includes a plurality of cameras and a recorder that records video from each of the plurality of cameras.

  The monitor system is connected to a monitor for displaying the video from each camera and the video recorded on the recorder. This monitor has been changed from a monitor with an aspect ratio of 4: 3, which has been used in recent years. : Changing to 9 Accordingly, the monitor output terminal of the monitoring system has both a connector for 4: 3 (for example, BNC connector) and a connector for 16: 9 (for example, HDMI connector). .

  There are 4: 3 and 16: 9 division patterns of the surveillance system that divides the video for the number of cameras and displays them simultaneously on one screen. As shown in FIG. 4, when a 4: 3 ratio division pattern is displayed on the 16: 9 monitor 100, approximately 25% of the non-video area 200 is generated when the left and right are aligned. For this reason, the display area of the monitor 100 cannot be used effectively. Further, when a 16: 9 ratio division pattern is displayed on a 4: 3 monitor, approximately 25% of the non-image area is generated in the vertical direction, causing the same problem as described above.

  Patent Document 1 discloses a technique for adjusting the area of each image so that the non-video area of the monitor screen is minimized when displaying a plurality of images in a ratio of 4: 3 on a 16: 9 monitor. Is disclosed.

JP 2008-289091 A

  However, as shown in FIG. 5, in order to display the divided video so that the non-video area 200 does not occur on each of the 16: 9 monitor 100 and the 4: 3 monitor 110, the monitor 100 and the monitor 110 are displayed. There is a problem that the video display control device for outputting video requires video memories for the monitor 100 and the monitor 110, which increases costs.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a video display control apparatus capable of obtaining video compatible with the screens of a plurality of monitors having different aspect ratios from a common video memory. And

  The video display control apparatus of the present invention stores memory means and a plurality of input digital video signals in the memory means, and from the memory means to all or a part of the plurality of digital video signals according to instructions from the outside. The controller means for cutting out the corresponding video and displaying it on a multi-screen, and the ratio by which the video corresponding to all or part of the plurality of digital video signals is cut out from the memory means by the controller means is the value specified by the instruction. Arithmetic means for controlling the controller means.

  According to the above configuration, since the video corresponding to all or a part of the plurality of digital video signals stored in the memory means is cut out at the designated ratio, the video suitable for the respective screens of the plurality of monitors having different aspect ratios can be obtained. It can be obtained from a common memory means.

  In the above configuration, the memory means is preferably a frame memory that stores digital video signals in units of frames.

  In the above configuration, the calculation means controls the controller means so that a ratio at which video corresponding to all or part of the plurality of digital video signals is cut out from the memory means is 16: 9 or 4: 3. .

  According to the above configuration, it is possible to obtain from the common memory means a video that matches the screens of the monitor having an aspect ratio of 16: 9 and the monitor of 4: 3.

  In the above configuration, there is provided video reduction means for reducing the video clipped by the controller means in accordance with a display size.

  According to the above configuration, the size of the clipped video can be reduced, so that it can be adjusted to the size when it is larger than the display size.

  According to the present invention, it is possible to obtain from the common memory means images suitable for the respective screens of a plurality of monitors having different aspect ratios.

The block diagram which shows schematic structure of the monitoring system which concerns on one embodiment of this invention The figure for demonstrating the function of the video display control apparatus shown in FIG. The figure which shows the example of a display on two monitors from which the aspect ratio differs by the video recorder from the video display control apparatus shown in FIG. Illustration for explaining the problems of the prior art Illustration for explaining the problems of the prior art

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of a monitoring system according to an embodiment of the present invention. The monitoring system 1 according to the present embodiment includes seven cameras 10-1 to 10-7 and seven analog / digital conversion units (hereinafter referred to as “A / D conversion units”) 11-1 to 11-7. A video display control device 12, a digital / analog converter (hereinafter referred to as "D / A converter") 13, an HDMI signal converter 14, a monitor 110 with an aspect ratio of 4: 3, and an aspect ratio of 16 : 9 monitors 100. The video display control device 12 includes a frame controller unit (controller unit) 121, a frame memory unit (memory unit) 122, a calculation unit (calculation unit) 123, and a video reduction unit 124. The A / D conversion units 11-1 to 11-7, the video display control device 12, the D / A conversion unit 13, and the HDMI conversion unit 14 constitute a recorder 20. The A / D converters 11-1 to 11-7 can be provided to the cameras 10-1 to 10-7, and the processing load on the recorder 20 can be reduced by doing so.

  Each camera 10-1 to 10-7 outputs the captured moving image as an analog video signal. Each of the A / D conversion units 11-1 to 11-7 digitally converts the analog video signals from the corresponding cameras 10-1 to 10-7 and outputs the analog video signals.

  The frame controller unit 121 stores digital video signals from the A / D conversion units 11-1 to 11-7 in the frame memory unit 122 in units of frames to form a multi-screen image. Further, the frame controller unit 121 cuts out a digital image of a multi-screen image from the frame memory unit 122 according to an instruction from the calculation unit 123, and multi-screen with a 16: 9 angle of view and a 4: 3 image within a 16: 9 angle of view. A 16: 9 angle of view multi-screen is output to the HDMI signal conversion unit 14, and a 4: 3 view angle multi-screen within the 16: 9 angle of view is output to the video reduction unit 124. To do.

  An example is shown in FIG. 2A is a multi-screen with a 16: 9 field angle, and FIG. 2B is a multi-screen with a 4: 3 field angle within a dotted frame 50 within the 16: 9 field angle. Since the 4: 3 angle-of-view multi-screen of (b) is large enough to be displayed on the 4: 3 monitor 110, it is reduced by the video reduction unit 124. That is, the image is reduced in accordance with the display size of the 4: 3 monitor 110. As described above, the frame controller unit 121 cuts out video corresponding to all or part of a plurality of digital video signals from the frame memory unit 122 in accordance with an instruction from the calculation unit 123 to configure a multi-screen.

  The frame memory unit 122 includes a volatile memory such as a DRAM (Dynamic RAM) and stores a digital video signal. The arithmetic unit 123 has a CPU (Central Processing Unit), and gives an instruction to the frame controller unit 121 to cut out a video of a specified ratio from a plurality of digital videos stored in the frame memory unit 122. For example, the calculation unit 123 controls the frame controller unit 121 so that the ratio at which video corresponding to all or part of a plurality of digital video signals is cut out from the frame memory unit 122 is 16: 9 or 4: 3. As a result, it is possible to obtain images suitable for the screens of the 4: 3 monitor 110 and the 16: 9 monitor 100 from the frame memory unit 122.

  The video reduction unit 124 reduces the video clipped by the frame controller unit 121 according to the display size of the monitor 110. As described above, since the 4: 3 angle of view multi-screen is large in size to be displayed on the 4: 3 monitor 110, it is reduced to fit the display size of the monitor 110. The D / A converter 13 converts the digital video signal output from the video display control device 12 into an analog signal and outputs it. The HDMI signal converter 14 converts the 16: 9 angle-of-view digital video signal provided from the frame controller 121 into an HDMI (High Definition Multimedia Interface) signal and outputs the converted signal to the monitor 100. The monitor 100 displays the digital video signal converted into the HDMI signal by the HDMI signal conversion unit 14. The monitor 110 displays the analog video signal from the D / A conversion unit 13.

  In FIG. 3, the video generated by the recorder 20 has a plurality of screens that match the aspect ratio of 16: 9, and is displayed on the 16: 9 monitor 100 as it is. Further, a 4: 3 area (area within the frame indicated by the dotted line 50) is cut out from the upper left of the screen and displayed on the 4: 3 monitor 110. At this time, the image of the area within the frame indicated by the dotted line 50 is a divided image adapted at a 4: 3 ratio. Outside this 4: 3 area, three images with a 4: 3 ratio can be displayed vertically.

  As described above, according to the monitoring system 1 of the present embodiment, in the video display control device 12, the frame controller unit 121 receives the digital video signals from the A / D converters 11-1 to 11-7 as frame memory units. 122, and in accordance with an instruction from the calculation unit 123, a digital image of a multi-screen image is cut out from the frame memory unit 122, and a multi-screen with a 16: 9 field angle and a 4: 3 field angle within the 16: 9 field angle are extracted. A multi-screen is configured, and a 16: 9 angle of view multi-screen is output to the HDMI signal conversion unit 14, and a 4: 3 view angle multi-screen within the 16: 9 angle of view is output to the video reduction unit 124, The calculation unit 123 has a ratio of 16: 9 at which the video corresponding to all or part of the plurality of digital video signals is cut out from the frame memory unit 122 by the frame controller unit 121. : Controlled to be 3. As a result, it is possible to obtain images suitable for the screens of the 4: 3 monitor 110 and the 16: 9 monitor 100 from one frame memory unit 122.

  In this way, for example, the monitor 110 of 4: 3 is placed on a monitor in a store such as a supermarket or a convenience store, and the monitor 100 of 16: 9 is placed in the back monitoring room where only employees can enter. If you put it, you can monitor the video that you don't want to see on the right three vertical screens.

  In addition, the video reduction unit 124 reduces the video clipped by the frame controller unit 121 according to the display size. Therefore, when the size of the clipped video is larger than the display size, it can be adjusted to the display size.

  In the present embodiment, seven cameras 10-1 to 10-7 and seven A / D converters 11-1 to 11-7 are provided in accordance therewith, but the number of cameras is not limited. It is optional, and the A / D converter may be matched to the number of cameras used.

  INDUSTRIAL APPLICABILITY The present invention has an effect that images suitable for respective screens of a plurality of monitors having different aspect ratios can be obtained from a common video memory, and can be applied to a monitoring system or the like.

DESCRIPTION OF SYMBOLS 1 Monitoring system 10-1 to 10-7 Camera 11-1 to 11-7 Analog / digital conversion part 12 Image | video display control apparatus 13 Digital / analog conversion part 14 HDMI signal conversion part 20 Recorder 100 16: 9 monitor 110 4: 3 monitor 121 frame controller unit 122 frame memory unit 123 arithmetic unit 124 video reduction unit

Claims (4)

Memory means;
Controller means for storing a plurality of input digital video signals in the memory means, and cutting out images corresponding to all or part of the plurality of digital video signals from the memory means in accordance with an external instruction;
Arithmetic means for controlling the controller means so that a ratio at which video corresponding to all or part of the plurality of digital video signals is cut out from the memory means by the controller means becomes a value specified by the instruction;
A video display control device.   2. The video display control apparatus according to claim 1, wherein the memory means is a frame memory that stores a digital video signal in units of frames.   The calculation means controls the controller means so that a ratio at which video corresponding to all or part of the plurality of digital video signals is cut out from the memory means is 16: 9 or 4: 3. The video display control apparatus according to claim 2.   4. The video display control device according to claim 1, further comprising video reduction means for reducing the video cut out by the controller means in accordance with a display size.

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