Realization method for synthesizing multi-path high-definition video image picture

Abstract

The invention relates to a realization method for synthesizing a multi-path high-definition video image picture, which is designed by adopting a card insertion mode. The invention comprises N video input synchronization cards and an image controller. The N video input synchronization cards select and receive N paths of real-time video signals and output image data to the image controller by tristate logic respectively. The video input synchronization cards all output the image data by a group of common horizontal and field synchronizing signals and image pixel clock signals, and each video input synchronization card can respectively set the position and the size of an output image and generates effective image data control signals corresponding to an output picture of the output image: Hor-DE-SPn and Ver-DE-SPn. The image controller adds a primary tristate latch or same-phase / opposite-phase buffer drive circuit at intervals of p slots and also generates a high-impedance state enable control signal corresponding to each stage and a control signal corresponding to each video input synchronization card so as to switch and gate the image data output by each video input synchronization card, so that the function of picture synthesis is realized.

Description

Technical field: [0001] The invention relates to electronic engineering video image processing technology, in particular to a technology for synthesizing multiple video image frames into one video image for output. technical background: [0002] At present, a video image synthesizer or a screen divider can synthesize multiple video images of different types or formats through real-time image processing and synthesize one video image output, and connect the output to a display device to display multiple real-time videos image. [0003] Common video image synthesizers can only input standard-definition composite video (PAL / NTSC), and multi-channel composite video is still output with 1 composite video after the picture is synthesized, and the image definition is very low. At present, most of the on-site real-time monitoring adopts this method; [0004] There are also video image synthesizers that can input high resolution such as VGA or DVI, and the output can also be digita...

AI Technical Summary

Problems solved by technology

This mode of video processing chip picture-in-picture channel has narrow video bandwidth and simple algorithm, so the composite picture is not clear

At the same time, the first-level input video must be multi-level processed before output, the delay time is too long, and the real-time performance of the image is very poor;

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