KR100189812B1 - The color video process apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color video processing apparatus in an image processing system, and more particularly, to a color video processing apparatus that provides various screens by processing color image signals in real time.

To this end, a real-time preprocessing means for editing a video signal converted into digital by the A / D conversion part in real time such as screen movement and screen synthesis, and an input lookup for converting the data processed by the real-time preprocessing means into a format desired by the user. Image framebuffer for temporarily storing data output from the unit and real-time preprocessing means or input lookup unit, and an output lookup unit for outputting data stored in the image framebuffer in a format desired by the user and an image signal output from the output lookup unit. And an encoder for receiving a synchronization signal output from the output composite synchronization signal control unit and outputting a final composite video signal converted into an analog signal.

Therefore, not only still images but also moving images can be edited, and a plurality of video signals can be synthesized to simultaneously view two screens. In addition, it is possible to insert specific character information into an image signal, to view a computer screen on a TV monitor or an LCD screen, and to perform high resolution color processing.

Description

Color Video Processing Unit

1 is a block diagram of a conventional color video processing apparatus.

2 is a block diagram of a color video processing apparatus according to an embodiment of the present invention.

3 is a moving picture processing example according to the present invention.

* Explanation of symbols for main parts of the drawings

10: Y / C separation means 20: color demodulation means

30, 100: A / D converter 40: memory

50: D / A converter 60: color modulation means

70: Y / C synthesis means 80: channel multiplexer

90: synchronization signal separation unit 110: real time preprocessing means

120: input lookup unit 130: color image frame buffer

140: real time lapse image frame buffer

150: output lookup unit 160: overlay memory

170: graphic overlay control means 180: output composite synchronous signal control unit

190: encoder 200: input composite synchronous signal control unit

210: logic controller 220: system input / output interface

230: communication path 240: scan converter

250 computer 260 display means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kali video processing apparatus in an image processing system, and more particularly, to a color video processing apparatus for providing various screens by processing color image signals in real time.

In general, an image processing system is a system for pattern recognition, image conversion, image measurement, and graphic processing using an image recorded on a recording medium. For example, a video conference system, an electronic publishing system, a control measurement system, etc. have.

1 is a block diagram of a conventional color video processing apparatus.

In FIG. 1, when the composite color image signal RGB is input, the Y / C separation means 10 separates the luminance signal Y and the chroma signal C. As shown in FIG. The color demodulation means 20 demodulates and outputs the color difference signals R-Y and B-Y obtained by subtracting the luminance signal from the composite video signal.

The Y / C separation means 10 outputs the luminance signal Y and the color difference signals RY and BY output from the color demodulation means 20 are digitally converted by the respective A / D converters 30 and digitally converted. The converted signal is stored in the memory 40.

The memory 40 has a luminance signal information area and a chrominance signal information area.

The D / A converter 50 converts each piece of information output from the memory into an analog signal.

The Y / C synthesizing means 70 synthesizes the luminance signal converted into the analog signal and the color difference signal modulated by the color modulating means 60 and outputs the composite color image signal.

However, the conventional color video processing apparatus has a problem in that it is not possible to edit a moving image because real-time processing of a moving image is not possible, as well as the transmission of a flat screen displayed on a computer monitor to a television monitor or a liquid crystal projector. In addition, since the resolution is low, there is a problem that image processing is impossible when a high resolution is required.

Accordingly, an object of the present invention is to provide a color video processing apparatus capable of editing a screen by pre-processing an input video signal in real time in order to solve the above problems.

Another object of the present invention is to provide a color video processing apparatus capable of transmitting a video signal by performing scan conversion between video devices having different scanning methods.

It is still another object of the present invention to provide a color video processing apparatus capable of storing a video signal input to a computer and converting the video signal into a video signal by providing a communication function with the computer.

In order to achieve the above object, a channel multiplexer and a synchronization signal separation unit for selecting a convolution signal output from an image device, an A / D converter and a synchronization signal for converting an analog video signal selected by the channel multiplexer into a digital signal In the color video processing apparatus of an image processing system having an input composite synchronous signal controller for controlling a synchronous signal output from the separation unit, a logic controller, a system input / output interface, a communication path, a computer, a display means, and an output composite synchronous signal controller, A real time preprocessing means for editing a video signal converted into digital by the A / D conversion part in real time such as screen movement and screen synthesis, and an input for converting the data processed by the real time preprocessing means into a format desired by a user A look up table and the real-time preprocessing means An image frame buffer for temporarily storing data output from the input lookup unit, an output lookup unit for outputting data stored in the image frame buffer in a format desired by the user, and an overlay for inserting character information into an image signal. A memory converter and a graphics inverter control means, a scan converter for converting a non-interace to an interlace, an image signal output from the output lookup unit and an output from the overlay memory and graphic overlay control means And an encoder for receiving a synchronization signal output from the output composite synchronous signal controller and outputting a final composite video signal converted into an analog signal.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

2 is a block diagram of a color video processing apparatus according to an embodiment of the present invention.

A, B, C, and D signals are video signals inputted from respective video devices. The channel multiplexer 80 selects one of A, B, C, and D video signals. In this case, the synchronization signal separation unit 90 separates the synchronization signal, and the input composite synchronization signal controller 200 and the logic controller 210 control the synchronization of the input image signal using the separated synchronization signal.

In addition, the channel multiplexer 80 separates the selected video signal into RGB signals and inputs them to the A / D converter 100. The A / D converter 100 includes an A / D converter 100a for converting an analog R signal output from the channel multiplexer 80 into a digital signal, an A / D converter 100b for converting a G signal into a digital signal, And an A / D converter 100c for converting the B signal into a digital signal. The A / D converter 100 converts analog RGB signals into digital signals and inputs them to the real-time preprocessing means 110 and the input lookup unit 120, respectively.

The real time preprocessing means 110 processes the image in real time by configuring hardware logic. The real time preprocessing means 110 displays the video signals converted by the A / D converter 100 at a predetermined ratio, or performs a wiping function of adjusting the width of the screen by an external switch operation. . In addition, it performs a function of selecting and synthesizing a desired video signal from a plurality of video signals.

The input lookup unit 120 is a means capable of processing the data processed by the real time preprocessing unit 110 to an arbitrary value desired by the user. In other words, the input data is freely converted and outputted in a predetermined format determined by the user. For example, if the user format is 9, 8, 7, 6, 5, 4, 3, 3, 2, 1 and the input data is 1, 2, 3, 4, 5, 6, 7, 8, 9, conversion The output data is 9, 8, 7, 6, 5, 4, 3, 2, 1 according to the user format.

Data output from the input lookup unit 120 is stored in the color image frame buffer 130 and the real time result image frame buffer 140, respectively. The color image frame buffer 130 and the real-time result image frame buffer 140 output screen data corresponding to one frame at a predetermined time period when there is a data request.

The output lookup unit 150 performs the same operation as the input lookup unit 120. That is, the output lookup unit 150 converts the data output from the color image frame buffer 130 and the real-time result image frame buffer 140 into a user format and outputs the converted data.

The overlay memory 160 and the graphic overlay control means 170 insert specific character information into the video signal.

The output composite synchronization signal controller 180 controls synchronization of each image signal output from the output lookup unit 150. That is, when the video signal A is switched to the video signal B, the synchronization signal according to the B video signal is output.

The encoder 190 receives a video signal RGB output from the output lookup unit 150 and a synchronization signal output from the output composite synchronous signal controller 180 as input, performs digital-to-analog conversion, and then performs first and second complexes. Output a synchronization signal.

The communication path 230 is composed of a small computer system interface (SCSI) and an RS232 connector, and plays a communication role when storing an input image in the computer 250 or transmitting a command of the computer 250. The scan converter 240 converts the scanning method so that a computer screen can be viewed on a television or a liquid crystal projector.

3 (a) to 3 (c) show an example of a moving image processing according to the present invention.

FIG. 3 (a) shows a wipe function, FIG. 3 (b) shows a mix function, and FIG. 3 (c) shows an insert function.

In FIG. 3 (a), 1) shows an example of moving a screen to widen screen A or widen screen B. FIG.

In FIG. 3 (a), 2) shows an example of moving the screen to widen the screen C or widen the screen D. FIG.

3 (b) shows an example of combining the screen A and the screen F. FIG.

3 (c) shows an example in which screen B having text information is combined with screen A or screen A having text information is combined with screen B. FIG.

As described above, the present invention can edit not only a still image but also an equal image, and combine two or more image signals to simultaneously view two screens. In addition, it is possible to insert specific character information into an image signal, to view a computer screen on a TV monitor or an LCD screen, and to perform high resolution color processing.

Claims (3)

A channel multiplexer 80 for selecting a video signal output from a video device for editing a moving image, an A signal for converting an analog video signal selected by the synchronization signal separator 90 and the channel multiplexer 813 into a digital signal. The input composite synchronous signal controller 200, the logic controller 210, the communication path 230, the computer 250, and the like, to control the wet signal outputted from the / D converter 100 and the sync signal separator 90; In an image processing system having an output composite synchronous signal controller 180, real-time preprocessing for editing a video signal, which is digitally converted by the A / D conversion unit 100, in real time, such as screen movement and screen synthesis. Means 110, an input lookup table 120 for converting the data processed by the real time preprocessing means 110 into a format desired by the user, and the real time preprocessing means 110 or the input. An image lookup buffer 150 and 140 temporarily storing data output from the up section 120 and an output lookup section 150 for outputting data stored in the image frame buffer 130 and 140 in a format desired by the user; And an encoder 190 which receives the image signal output from the output lookup unit 150 to the output composite synchronous signal controller 180 and outputs the final composite image signal converted into an analog signal. Color video processing apparatus characterized in that. The analog video signal selected by the channel multiplexer 80, the synchronization signal separator 90, and the channel multiplexer 80 for selecting a video signal output from a video device to edit video and insert character information into a digital signal. A / D converter 100 for converting, input synchronous signal controller 200 for controlling the synchronous signal output from the synchronous signal separator 90, the logic controller 210, the communication path 230 and the computer (250) and an output composite synchronous signal control unit (180), comprising: real-time preprocessing means (110) for real-time image editing of a digitally converted image signal such as screen movement and screen synthesis; And an input lookup table 120 for converting the data processed by the real time preprocessing means 110 into a format desired by the user, and the real time preprocessing means 110 or the input. An image frame buffer 130 and 140 temporarily storing data output from the output lookup unit 120, and an output lookup unit for outputting data stored in the image frame buffer 130 and 140 in a format desired by the user ( 150, an overlay memory 160 and a graphic overlay control means 170 for inserting the character information into an image signal, an image signal output from the output lookup unit 150, the overlay memory 160, and a graphic. And an encoder 190 for receiving the synchronization signal output from the overlay control means 170 to the output composite synchronous signal controller 180 and outputting the final composite video signal converted into an analog signal. Color video processing apparatus. The scan converter according to claim 1 or 2, wherein the color video processing apparatus converts a non-interace into an interlace in order to display an edited image between display devices having different scanning methods. Color video processing apparatus further comprises a 240.