JP2000242252A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand/display a video on an optionally specified place without lowering the definition of the video before composition by constituting a composited video on a frame buffer, specifying the place and the range to be expanded, converting the range into a video signal, expanding/displaying it, fetching with video definition before composition and converting it into the composited video matched with monitor display ability at the output time. SOLUTION: A place detecting device 213 decides an expanded place by retrieving a cursor place in the frame buffer 210. The place to be expanded/ displayed on a composited picture is changed according to the movement of the cursor. A video compositing device 209 composites the video signals from video signal converting devices 205-208 to write in the composited video on the frame buffer 210. A video converting device 211 takes out video information from the frame buffer 210 based on display range information from a controller 215, and converts it into the video signal matched with the display power of the monitor to output it to a monitor output terminal 212.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen image display system that displays one huge image on a plurality of screens, and displays a plurality of images on one monitor screen, and displays the synthesized image. To display the whole or a part of the multi-screen by enlarging and moving the image.

[0002]

2. Description of the Related Art Conventionally, it has been possible to combine a plurality of images into one image, but it has not been possible to arbitrarily enlarge the combined image or move the display range.

[0003]

When a plurality of high-definition images are synthesized and displayed, it is necessary to reduce the definition of each image to be synthesized according to the display capability of the monitor. If you want to check the details of the video, it is possible to specify a part of the video and display it in an enlarged manner. It becomes a video. It is necessary to be able to display each synthesized image without deteriorating the definition even when the image is enlarged and displayed.

An object of the present invention is to enlarge and display an image at an arbitrarily designated position in a synthesized image without reducing the definition of the image before synthesis.

[0005]

Means for Solving the Problems A composite image is formed on a frame buffer, a position and a range to be enlarged are designated from the composite image, and the range is converted into a video signal, and a part of the composite image is enlarged and displayed. be able to. By taking in the frame buffer with the definition of the video before the synthesis and converting it into a synthesized video according to the display capability of the monitor at the time of outputting the video, it is possible to prevent a decrease in the definition at the time of enlarged display.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a system used to implement the present invention. In FIG. 1, a monitor screen 100 for displaying an image, an image display device 101 for combining a plurality of images and outputting the image on the monitor screen, and a multi-image generation device 102 for generating an image corresponding to a multi-screen are provided.

FIG. 2 is a block diagram of a video display device used to carry out the present invention. In FIG. 2, a video display device 200, video input terminals 201 to 204 for inputting a plurality of video signals to be displayed, and video signal conversion devices 205 to 208 for converting each of the input video signals according to a condition for synthesizing the video signals. A video synthesizing device 209 for synthesizing a plurality of videos, a frame buffer 210 for storing the synthesized video, a video converting device 211 for extracting a specified range from the frame buffer 210 and converting it into a video signal,
Monitor output terminal 212 for outputting the generated video signal
, A position detection device 213 for detecting a position to be enlarged, an input device 214 for setting a video display device, and a control device 215 for controlling the entire video display device.

Next, an image display operation in the embodiment will be described with reference to FIG. In this embodiment, four video signals are input. Video signal input terminals 201 to 20
4 are input to the video signal converters 205 to 208, respectively. Each video signal converter analyzes the input video signal and notifies the control device 215 of the signal specifications. The control device 215 determines the optimal signal specification to be displayed on the monitor screen based on the information from the video signal conversion devices 205 to 208 and the information on the size of the video to be displayed specified by the input device 214 in advance.

In determining the optimum signal specifications, if a high-definition video is synthesized as it is, the display capability of the monitor will be exceeded. When synthesizing video with different definition, it involves a process of converting another video signal so as to unify the input video signal into the video signal with the highest definition, and enabling a composite display. .

The control device 215 notifies the video signal conversion devices 205 to 208 of the specifications of the signals to be output. At the same time, the control device 215 notifies the video synthesizing device 209 of information relating to video synthesis and display, and
11 is notified of the information of the enlarged position from the position detecting device 213. The position detection device 213 determines the enlargement position by searching for a position of a cursor having a specific shape in the frame buffer 210.

Therefore, the enlarged display position is the center of the image displaying the cursor display position, and the enlarged display position on the composite screen changes as the cursor moves. The video synthesizing device 209 synthesizes the video signals from the video signal converters 205 to 208 and writes the synthesized video on the frame buffer 210. The video conversion device 211 includes the control device 21
5 based on the information of the display range from 5
, And converts the video information into a video signal that matches the display capability of the monitor, and outputs the video signal to the monitor output terminal 212.

FIG. 3 is an image diagram of an enlarged display when four images are synthesized. 4 on the frame buffer 300
The two images 301 to 304 are combined, and the position
The enlarged image 305 having the size designated by the input device 214 is output with the cursor 306 detected as the center.

[0014]

As described above, according to the present invention, a plurality of videos can be synthesized and simultaneously viewed on one monitor screen, and can be enlarged and displayed without lowering the definition of the video. Assist the user in checking the video.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a system used to implement the present invention.

FIG. 2 is a block diagram showing a video display device used to carry out the present invention.

FIG. 3 is a diagram of an image when four images are synthesized and displayed and enlarged.

[Explanation of symbols]

100: monitor screen, 101: video display device, 102:
Multi-video generation device, 200 ... video display device, 201 to 201
204: video signal input terminal, 205 to 208: video signal conversion device, 209: video synthesis device, 210: frame buffer, 211: video conversion device, 212: monitor output terminal, 213: position detection device, 214: input device, 215
... Control device, 300 ... Frame buffer, 301-30
4 Video, 305 Output video, 306 Cursor.

Claims (1)

[Claims] 1. A plurality of video signal converters for inputting a plurality of video signals and converting the video signals into video signals suitable for display on a monitor screen, and a plurality of video signals converted by the video signal converter. Synthesizing a single video and writing it into a frame buffer, a video converter that extracts a video in a range to be displayed from the frame buffer and converts it into a video signal, and a position detection device that determines a display range of the synthesized video And an input device, wherein a plurality of videos are combined and displayed, and the display content can be enlarged and moved while maintaining the definition of the videos.