KR970056794A - Programmable Color-Bar Generator - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color-bar generator, in particular a video inspection signal generator, comprising a general purpose microprocessor for controlling and operating the entire circuit, a computer system connected to the microprocessor by an interface circuit, and A refresh memory unit for storing image data, an address signal output from the microprocessor, a control organization unit for receiving an address signal or a data signal and converting an address signal and a data signal input to the memory unit, and receiving a signal from the microprocessor, A pixel clock generator which receives a clock signal from a data bus mediator and an address bus mediator and a clock generator that operates according to the selection of the control organization unit, and calculates a blanking time and generates a synchronization signal, and outputs the output signal of the pixel clock generator. An address counter unit for mounting an address of the memory unit, a digital-to-analog converter for reading data of the memory unit corresponding to the synchronization signal and the address signal by the address counter from the pixel clock generator, and converting the data into an analog signal; A digital to analog converter is provided with a video modulator for generating a video signal from an analog signal, and is easily generated by changing a color-bar signal and a pattern according to the purpose of use, and integrally with a display unit indicating the generated signal. Provides a programmable color-bar generator that can be implemented.

Description

Programmable Color-Bar Generator

Since this is an open matter, no full text was included.

2 is a block diagram of an inspection apparatus for a video signal processing printed hero substrate when using a programmable color-bar generator according to the present invention;

3 is a block diagram of a programmable color-bar generator according to the present invention,

4 is a video signal and a color-bar pattern according to an embodiment of the present invention.

Claims (1)

Microprocessor means for operating the control and operation of the entire circuit, a computer system operating as a main system connected to the microprocessor means by an interface circuit, a refresh memory unit for storing digitalized image data, and the microprocessor means A control organization unit for receiving an address signal or a data signal outputted from the memory unit, and switching an address signal and a data signal input to the memory unit, and a data bus receiving a signal from the microprocessor means and operating according to the selection of the control organization unit. An address card for addressing the memory unit by counting the output signal of the pixel clock generator, a pixel clock generator for receiving a clock signal from the clock generator, calculating a retrace time, and generating a synchronization signal; And a digital-to-analog converter that reads data from the memory unit corresponding to the synchronization signal from the terminal unit and the pixel clock generator and the address signal by the address counter and converts the data into an analog signal, and the analog signal by the digital-analog converter. And a video modulator for generating a video signal from and outputting the output signal to the display. ※ Note: The disclosure is based on the initial application.