JPH0365889A - One screen display device - Google Patents

Abstract

PURPOSE:To facilitate visual recognition by displaying a reduced screen video displayed on a monitor individually with magnification. CONSTITUTION:A 4 screen video signal 12 reproduced from a VTR 5 is added to a picture selection section 8. When a signal which selects an optional picture such as P1, among 4 screen videos P1, P2, P3, P4 from a picture selecting signal generating section 13 is added to the picture selection section 8, the picture selection section 8 extracts only a scanning line (including video image) between horizontal directions H1-H2 together with scanning lines S1-S100, stores the result in a picture memory 9 and other videos P2, P3, P4 are eliminated. Then as required, optional image in plural reduced screen videos displayed as one screen is selected and displayed on a monitor with magnification. Thus, visual recognition is facilitated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for reducing a video taken by a single-screen display device, particularly a device related to a surveillance television camera system, and displaying multiple reduced videos simultaneously as a single screen. The present invention relates to a single-screen display device that selects and enlarges one video.

[Conventional technology]

In systems that use a large number of surveillance cameras (for example, supermarkets, banks, logistics sorting systems, etc.), it is not only uneconomical to use monitors that correspond to the number of cameras, but also the space for installing the monitors is not available. There are many.

Therefore, in the past, images from multiple cameras, for example four, were each
A popular method is to reduce the image size to 4/4 (split into 4), display the four reduced screens simultaneously on one screen, and view images from four cameras simultaneously on one monitor.

FIG. 3 is a system diagram showing the principle of the conventional device.
image memories FM1. FM2, FM3. Each of the four images is stored in FM4, and at the same time, each of the four images is reduced to 1/4 by the scan conversion circuit TL built in the four-screen device 3 and recorded on the VTR 5 as a 4-split image, and the recorded images are displayed on the monitor 4. Image Pl of each camera CI in one screen
, image P2 of camera C2, and similarly P3. It is displayed as shown in P4.

[Problem to be solved by the invention]

As mentioned above, in the conventional device, when the recorded image of the VTR 5 is played back, the 4-screen image divided into 4 parts is displayed on the monitor 4.
P2. P3. Although it can be displayed as in P4, each image is displayed in a reduced size, which has the disadvantage of causing inconvenience when visually recognizing it.

[Means to solve the problem]

SUMMARY OF THE INVENTION An object of the present invention is to provide a single-screen display device that can select and enlarge and display a plurality of reduced images or 21 images displayed on one screen.

The single-screen display device of the present invention includes a selection unit that reduces each video from a plurality of cameras to a plurality of parts and selects any one video from the plurality of videos recorded as one screen;
The present invention is characterized by a mechanism for enlarging and displaying one image selected by the selection section.

[For production]

In the single-screen display device of the present invention, any one of the plurality of reduced-screen images displayed as one screen is selected and enlarged and displayed on the monitor as necessary.

〔Example〕

The present invention will be explained in detail below with reference to the drawings.

In the present invention, as shown in FIG. 1, a four-screen video signal 12 reproduced from a VTR 5 is added to an image selection section 8, and a four-screen video signal PI is generated from an image selection signal generation section 13.

P2. P3. When a signal for selecting any one of P4, for example Pl, is applied to the image selection section 8, the image selection section 8
As shown in FIG. 2, simultaneously with the scanning lines 81 to 5100, only the scanning lines (including the image) between the horizontal directions H1 and H2 are extracted and stored in the image memory 9, and other images P2, P3.
P4 is removed. This image selection section 8 is generally known as a timing gate circuit, and detailed explanation thereof will be omitted.

Similarly, video P2. Either P3 or P4 can be selected.

FIG. 2 shows a waveform diagram of a 4-screen video signal for explaining the function of the image selection section 8, and the 4-screen video signal 12 is a 4-screen video signal PI, P2. P3. Consists of P4. For the sake of explanation, an example will be explained in which the scanning lines are composed of <200 as shown in one screen diagram and are not interlaced. Also, H1, H2, and H3 are horizontal scans! ,? The starting point, midpoint, and end point of the scans of lS1-200 are shown. C is the vertical center line of the screen and scan lines 5100 and 5
101 and indicates the upper and lower division of the screen.

Here, the image of Pl is the H1-H2 part (solid line) at S1-3100, the image of P2 is the H2-H3 part (solid line) at S1-5100, and the image of P3 is the H1-H2 part (solid line) at S1-5100.
The H2 part (solid line) and the P4 image are composed of 5lots to 5200, and the H2 to H3 parts (solid line).

Further, BL indicates a horizontal synchronization or horizontal retrace signal.

The selected video signal stored in the image memory 9 in this way is scanned by the image memory signal successive section 10, and is displayed as a standard video signal on the single screen display monitor 7 with 100 pages P'1. P'2. It is enlarged and displayed as P"3 or P"4. By switching the signal changeover switch 11, this single-screen display monitor 7 can display the above-mentioned enlarged selection and the unenlarged four-screen images PI, P2. P3. It can be used for simultaneous display of P4.

〔Effect of the invention〕

As described above, according to the apparatus of the present invention, each of the reduced-screen images displayed on the monitor can be enlarged and displayed, which has the great advantage of making visual recognition extremely easy.

[Brief explanation of drawings]

Fig. 1 is a system diagram of the main parts of the device of the present invention, Fig. 2 is a waveform diagram of a four-screen video signal to explain the function of the image selection section, and Fig. 3 is a system diagram showing the principle of the conventional device.
It is. ■...Camera group, 2...Video signal, 3...4 screen device, 4...Monitor, 5...VTR17...1
Screen display monitor, 8... Image selection section, 9... Image memory, 10... Image memory signal reading section, 11...
Signal changeover switch, l20.・4 screen video signal, 13
...Image selection signal generation unit, BL...Horizontal synchronization or horizontal retrace signal, C...Vertical center line, CI, C2, C3C
4...Camera, FMI, FM2. FM3. FM4...
- Image memory, Hl, H2, H3...Scanning start point, midpoint 1 end point, PI, P2. P3. P4...4 screen video,
P”1. P”2. P'3. P'4...1 screen, T
L...Scan conversion circuit, 5L-3200...Scanning line. d

Claims (1)

[Claims] (1) A selection section that reduces each video from a plurality of cameras to a plurality of parts and selects any one video from the multiple videos recorded as one screen, and the one selected by this selection section. 1. A single-screen display device comprising: a mechanism for enlarging and displaying two images;