JPH0486172A - Multipicture display method - Google Patents

Abstract

PURPOSE:To secure the continuity of a picture by fetching signals corresponding more by a drop-out rate in longitudinal and transverse directions of a divided input picture with respect to the input picture and an output display picture different in aspect ratio. CONSTITUTION:When the upper part and the lower part of the input picture are partially masked, a multipicture control program in a system control part 13 is sent to a picture processing part 12, and segmenting address of the picture are designated in longitudinal and transverse directions by a picture processing part 12 at the time of fetching the input picture. Signals corresponding to the drop-out rate are fetched more by address designation, and fetched divided pictures are sent to respective projectors in the picture processing part 12, and the picture expanded by the drop-out rate is projected on each screen. The expanded part corresponds to the masked part in the transverse direction and corresponds to the part taken excessively, namely, the part of an adjacent pictures in the transverse direction, and joints are correctly kept as the whole of a picture.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a multi-image display method in a large-scale information display system in which input images and output images have different aspect ratios.

[Prior Art] Conventionally, for example, at events or in Joe rooms, a method has been used in which a plurality of screens are assembled to form one large video screen and a large image is projected on the screen. In this case, each partial image, which is divided into multiple parts of a large overall image, is displayed on a plurality of screens.

If jumbo-sized images are displayed using such a system, advertising effects can be expected. Of course, separate images can also be displayed on each of a plurality of screens.

Here, we will take as an example the case of a large LCD (liquid crystal display) information display system having an optical fiber screen whose entire screen is divided into nine vertical and horizontal 3x3 sections. That is,
Input the output of monitor television, video, etc. to a screen splitting device to split one television or video image into 9 parts.
Output each divided image.

FIG. 2 is a process diagram for displaying an image divided into nine parts.

The nine divided images are each sent to nine corresponding projectors 22 through coaxial cables.

Each projector 22 displays the sent image on an LCD (
The image on the LCD is projected onto the fiber end face 24 using the lamp 21. For example, a metal halide lamp with excellent color characteristics is used as a light source for projecting images. This allows the colors of the input video to be reproduced as they are. A plurality of optical fibers 27 are embedded in the fiber end face 24, and the optical fibers 25 are bundled and extended to the display screen 26. Since the display screen 26 is an enlarged size screen, the distance between the optical fibers 27 is larger than the distance at the fiber end face 24.

In this way, in the display system shown in Fig. 2, the display surface 26 is constructed from a plastic fiber 27, and the video input is constructed from an LCD, which takes advantage of the characteristics of optical fibers to achieve high resolution, thinness, and easy maintenance. has been realized. This display system combines two blocks of optical fibers.

Large, high-resolution display systems with shapes and sizes that meet various requirements can be constructed. 3m optical fiber 27
By arranging 130,000 lines/m' at m pitch, it is possible to display fine images. Furthermore, in this way,
Examples of devices that bundle and display optical fibers include:
Japanese Patent Application No. 57-51666 and drawings ``An illuminated display device 2 is proposed.

[Problem to be solved by the invention]

As shown in Figure 2, when a 1/9 partial image recorded in the NTSC format is enlarged and displayed on each of the nine divided display screens, the aspect ratio of the display output screen for all nine is 3 vertically. It is a ratio of 4 horizontally. In addition, since the aspect ratio of the input image is usually 4.3 (horizontal:vertical), if the image is enlarged as is, the continuity of the image is ensured even if each image is aggregated into one large image. has been
There are no gaps at the border.

However, if the shape of the original television or video image from which the image is input is slightly deformed, the aspect ratio will not be 4=3, and accordingly the aspect ratio of the output display image will not be 43. For example, when an image is projected onto the fiber end face 24 in FIG. 2, the upper and lower parts of the screen are sometimes masked due to the manufacturer's convenience of creating the input image. At this time, if the aspect ratio of the image on the fiber end face 24 is 4:2.9, then the aspect ratio of each image displayed on the nine screens will also be 4:2.9.

On the other hand, since the size of the display screen 26 is 4:3, there is a gap in the image at the border between each display screen 26 (the image liquid is a part).
occurs, and the continuity of the entire image is lost.

The purpose of the present invention is to solve such conventional problems and to
When displaying SC video signals in multiple images, a multi-image system that eliminates screen gaps due to signal loss and ensures image continuity for input images and output display screens with different aspect ratios. The purpose is to provide a display method.

[Means for Solving the Problems] In order to achieve the above object, the multi-image display method of the present invention divides an input image using an NTSC video signal into a plurality of parts and displays the divided images. If a part of the input image is deformed and the aspect ratio of the divided input image and the display screen corresponding to the input image are different, the missing ratio is calculated for each of the vertical and horizontal directions of the divided input image. In order to capture as many signals as possible,
The feature is that the program specifies the cropping addresses of the input image in both the vertical and horizontal directions, and displays the cropped enlarged images on separate display screens.

[Function] In the present invention, in order to make the aspect ratio of the input image and the output display screen the same, as many signals as the missing ratio are taken in each of the vertical and horizontal directions of the input image.

In other words, in order to ensure continuity of images when displaying multiple images with different aspect ratios, the multi-image control program specifies image cropping addresses in both the vertical and horizontal directions and imports the input image. . For example, if the input image is masked at the top and bottom as in this embodiment, an image wider by the size of the mask is specified and captured into the projector. In addition, in the horizontal direction, if you enlarge the captured image by only the missing parts, the image will protrude in the horizontal direction, so in order to maintain the correct seam of the image, increase the signal by the proportion of missing parts in the horizontal direction due to the protrusion. take in.

〔Example] EMBODIMENT OF THE INVENTION Below, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall block diagram of a multi-image display system showing one embodiment of the present invention.

In FIG. 1, 10 is an optical fiber screen consisting of a set of display screens divided into 9 parts, 11 is a speaker, 12 is an image processing section, 13 is a system control section, 14 is a stereo amplifier, and 15 is a VTR (video tape recorder).
, 16 is a personal computer, 17 is Videotex, 18 is an image conversion device, 19 is a video disc, 20
is a TV (television) camera.

To explain the correspondence with FIG. 2, according to instructions from the program of the system control unit 13 in FIG.
The original input image is imported from each device of 0. The captured input image is transferred to the image processing section 12. A screen dividing device that divides the original image into nine parts is built into the image processing unit 12, and each divided input image is transferred to each projector 22 in the optical fiber screen 10 via a coaxial cable. Therefore, all of the parts shown in FIG. 2 are located within the fiber optic screen 10 of FIG. The system control unit 13 includes the image processing unit 1
2, the stereo amplifier 14 is controlled in synchronization with the image, thereby amplifying the sound corresponding to the image and causing the left and right speakers 11 to sound.

FIG. 3 is an explanatory diagram of the display screen and address designation for the display image according to the present invention, and FIG. 4 is an explanatory diagram of the cutting process for the human-powered image according to the present invention.

In this embodiment, as shown in FIG.
is used as a video input source, an input image is projected onto the optical fiber end face 24, an input partial image is transferred via the optical fiber 25, and the image is projected on the other end face display screen 26. At this time, continuity of the screen is ensured despite the difference in aspect ratio between the LCD 23 of the projector 22 and the fiber end face 24.

Assuming that the upper and lower parts of the input image taken into the LCD 23 are partially masked, the aspect ratio of the input image will deviate slightly from 4:3 (horizontal:vertical). For example, the aspect ratio of the LCD 23 is 4.
- Assume that it is 2.9 (horizontal: vertical). If the image is received by the fiber end face 24 as it is, since the aspect ratio of the screen of the fiber end face 24 is 4:3, a non-displayed portion of the image, that is, a dropout, will occur between blocks due to signal loss.

Therefore, in this embodiment, the system control section]3
The multi-image control program in the above is sent to the image processing section 12, and when the image processing section 12 takes in the original input images of ]5 to 20, image cutting addresses are designated in the vertical and horizontal directions. By specifying the address, as many signals as the missing rate are captured, and the captured divided images are sent to each projector in the image processing section 12. That is, since the upper and lower parts of the input image are masked as shown by diagonal lines in FIG. 4, the horizontal to vertical ratio is AI + A2. In the projector, the image range input to the fiber end face 24 becomes the size of BIXB2 in FIG. 4 by taking in as many signals as the dropout rate and projecting them onto the fiber end face 24.

As a result, as shown by the broken line in Figure 3, the display screen displays the following information:
An image (range indicated by B) enlarged by the missing rate is displayed on each screen. The screen range that is normally displayed is the part A surrounded by a solid line, and the part that is obtained by subtracting the range A from the range B, that is, the enlarged part (the part that protrudes outside the screen) is the part that is enlarged in the vertical direction. This corresponds to the masked part, and in the horizontal direction, it corresponds to the extra captured part, that is, the part of the adjacent image, so the seam is maintained correctly for the entire image, and the continuity of the image is maintained. Gender is preserved.

Below, adjustment processing by program address designation will be explained separately in the vertical direction and the horizontal direction.

(1. Vertical Adjustment) Since the upper and lower parts of the image input to the LCD 23 are masked, as many signals as the missing rate are taken in by addressing the program. The missing rate is calculated using the following formula.

First, the number of TV scanning lines (horizontal) per l block is 17STV lines (=525+
3).・・・・・・・・・ (1) On the other hand, LCD
The number of horizontal lines is 240.

Therefore, the number of TV scanning lines to which one LCD line corresponds is 0.729 TV lines (=175-i-240).

・・・・・・・・・・・・・・・ (2) Video loss due to lack of LCD is caused by L, which corresponds to a mask of the input image.
Since the number of CD lines is 1 at the top and 5 at the bottom, there are 5 TV lines (0,729x6).

Therefore, the omission rate for the entire screen is 2.9 (%) by multiplying the number of missing lines by 3 blocks and dividing by the number of scanning lines for the entire screen, 525 (= 5 (TV lines) x 3). (Block 1525 (TV book)).

(3) By specifying addresses using a program, it is sufficient to capture images by 2.9% of 525 (TV lines) more scanning lines. That is, 525 (TV books) xo, 029 = 15.22
5, or 15 (TV books) more. For one block, (525+15)+3=180 (TVs) should be included.・・・・・・・・・・・・ (4
) (ii. Horizontal adjustment) Since the mask of the image input to the LCD 23 is only in the vertical direction, the aspect ratio of the effective image deviates from 43 (horizontal and vertical), and the image on the LCD 23 is smaller than that of the fiber end face 24. The vertical direction becomes shorter. Therefore, in order to maintain the continuity of the image, if you enlarge the image by the amount of the missing part, either the protruding part in the vertical direction becomes a mask part and continuity is maintained as described above, or the continuity is maintained in the horizontal direction by extending the effective image. A portion will occur. Therefore, in the horizontal direction, in order to maintain correct image seams, as many signals as the horizontal loss rate due to protrusion are taken in.

The horizontal omission rate is calculated as follows.

First, since the horizontal missing rate is equal to the vertical missing rate,
According to the result of (3) above, it is 2.9%.

The number of TV scanning lines in the horizontal direction is 473 times the number of scanning lines in the vertical direction, assuming that there are scanning lines in the same way as in the vertical direction, so it is 700 (TV lines) (= 525 x 4 ÷
3),, (5) TV per l block
The number of scanning lines is 233°33 (TV lines) (=7
00-3). (6) The number of TV programs to be added per block to compensate for missing data is approximately 240 (TV channels) (=700×1°02923).・・・・・・・・・
(7) Next, a method of specifying an address using a program will be explained.

(ii+, Addressing method) For each block, an address is calculated taking into consideration the number of protruding lines in both the vertical and horizontal directions. That is, as for the number of protruding lines, in the vertical direction, approximately one extra line is addressed at the top and about four lines at the bottom. Also, in the horizontal direction, the total number is 24C) - 233 = 7 (books), so if we divide it into left and right, ? -1-2=3.5, and about 4 extra lines are addressed. Here, it is assumed that (vertical and horizontal scanning line positions) are indicated as address designation values.

In FIG. 3, the address (starting address) at the upper left corner of the portion A surrounded by the solid line, that is, the normal display block (A), is (1, 1). Also, the address (starting address) of the upper left corner of the display block (b) is (176, 23
4). Further, the address (starting address) at the upper left corner of the display block (c) is (351, 467).

In this embodiment, the above address is not specified by the program, but an enlarged address is specified. That is,
The address (starting address) at the upper left corner of the portion B surrounded by the broken line in FIG. 3, that is, the enlarged display block (a), is (525, 697). Further, the address (starting address) of the upper left corner of the enlarged display block (b) is (175, 230). Further, the address (starting address) of the upper left corner of the enlarged display block (c) is (350, 463). Note that the enlarged address on the display screen corresponds to the screen cutting address on the LCD.

As is clear from the address value above, the normal address (1
, 1) is an address (1(526)-1, 1(701)-4) that overlaps with the adjacent screen, and for (176,234), it is (176-1, 2).
34-4), and for (351,467) it is (3
51-1, 467-4). (a) and (b) in Figure 3
Address designation is performed in exactly the same manner for display screens other than (c).

Although this embodiment has been described using an example of a large-scale multi-image display system using optical fibers and liquid crystal, the present invention can be applied to any display screen as long as it is a display device that handles NTSC signals.

[Effects of the Invention] As explained above, according to the present invention, when displaying multiple images between an input image and an output display screen having different aspect ratios, the image quality that occurs due to signal loss due to the difference in aspect ratio is reduced. Since gaps can be eliminated, images with continuity can be realized.

[Brief explanation of the drawing]

FIG. 1 is an overall block diagram of a multi-image display system showing an embodiment of the present invention, FIG. 2 is a perspective view of a divided screen projector and an optical fiber display surface in the present invention, and FIG. 3 is a perspective view of a divided screen projector and an optical fiber display surface in the present invention. In the diagram of the display screen and video display range, 4th rgJ is a diagram showing the address designation range of the liquid crystal panel in the present invention. 10. Optical fiber screen, toss beaker, 12 image processing section, 13. System control section, 14 Stereo amplifier, 15: VTR 116: Personal computer, 17. Videotex, 18 Image conversion device, 19 Video disc, 20: TV camera, 21: Metal halide lamp, 22: Projector, 23' Liquid crystal panel (LCD), 24: Fiber end face, 25 Optical fiber transmission line, 274 Optical fiber, 26 Display screen, A:
Display screen, B: Expanded video range. C11'", -2゜

Claims (1)

[Claims] (1) In a multi-image display method in which an input image using an NTSC video signal is divided into multiple parts and displayed, a part of the divided input image is deformed, and the input image corresponds to the divided input image. If the aspect ratio of the display screen is different, the cutout address of the input image in both the vertical and horizontal directions is set by the program so that as many signals as the missing ratio are captured in each of the vertical and horizontal directions of the divided input image. A multi-image display method characterized by displaying designated and cropped enlarged images on separate display screens.