KR940005141A - Quality comparison device - Google Patents

Abstract

Automated quality that adjusts image brightness by detecting luminance signal level in composite video signal, adjusts fineness of image by detecting high frequency component in horizontal direction and correlation amount in vertical direction, and improves signal-to-noise ratio by detecting envelope of video signal. A device for comparing a picture quality of a video device having compensation means is described, which comprises: synchronization signal separating means for separating horizontal and vertical synchronization signals from a video signal; Vertical bar generating means for receiving a horizontal synchronization signal and generating a signal for separating a horizontal direction between a first screen displaying a fuzzy screen and a second screen displaying a general screen in the same screen; Horizontal bar generating means for receiving a vertical synchronization signal and generating a signal for separating the first screen for fuzzy screen display and the second screen for general screen display in a vertical direction in the same screen; The signal generated by the vertical bar generating means or the horizontal bar generating means is superimposed on the video signal to form a mixing means for distinguishing the first screen and the second screen so that the fuzzy screen and the general screen are compared within the same plane.

Description

Quality comparison device

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

1 is a block diagram of an apparatus for comparing a general image quality and a fuzzy image quality on the same screen according to the present invention;

2 is a detailed block diagram of the image quality comparison block shown in FIG.

3 is a time chart of a horizontal synchronization signal for comparing two image quality left and right on a screen;

4 is a time chart of a vertical synchronization signal for comparing two image quality up and down on a screen.

* Explanation of symbols for main parts of the drawings

1: fuzzy block, 2: synchronous signal separator,

3: quality comparison block, 5: monitor,

301: horizontal / vertical synchronous signal selector switch,

303,307,321,329: monostable multivibrator,

304: Variable resistance for vertical bar position movement adjustment

308: variable resistance for vertical bar thickness adjustment,

310: multiplexer,

311: variable resistance for image compensation adjustment,

313: variable resistor for vertical, horizontal bar color adjustment,

322: variable resistor for horizontal bar position movement adjustment,

330: variable resistor for adjusting horizontal bar thickness.

Claims (7)

Automated quality that adjusts the brightness of the image by detecting the luminance signal level in the composite video signal, adjusts the fineness of the image quality by detecting the horizontal high frequency component and the vertical correlation, and improves the signal-to-noise ratio by detecting the envelope of the video signal. An image quality comparison apparatus of a video apparatus having a compensation means; Synchronization signal separation means for separating the horizontal synchronization signal and the vertical synchronization signal from the video signal; Vertical bar generating means for receiving the horizontal synchronization signal and generating a signal for separating a first screen displaying a fuzzy screen and a second screen displaying a general screen in a horizontal direction in the same screen; A horizontal bar generating means for receiving the vertical synchronization signal and generating a signal for separating a fuzzy screen display first screen and a general screen display second screen in a vertical direction in the same screen; And a mixing means for distinguishing the first screen from the second screen by superimposing a signal generated by the vertical bar generating means or the horizontal bar generating means on a video signal. The horizontal bar generating means of claim 1, wherein the vertical bar generating means moves the position of the vertical bar separating the first and second screens in the horizontal direction, thereby adjusting the size of the first and second screens in the same screen in the horizontal direction. Image quality comparison device, characterized in that relatively variable. The horizontal bar generating means of claim 1, wherein the horizontal bar generating means moves the position of the horizontal bar separating the first and second screens in the vertical direction, thereby adjusting the size of the first and second screens in the vertical screen in the vertical direction. Image quality comparison device, characterized in that relatively variable. The image quality comparing apparatus of claim 1, wherein the vertical or horizontal bars have a predetermined thickness to reliably distinguish the first and second screens in a horizontal or vertical direction. The image quality comparison device according to claim 4, wherein the vertical or horizontal bars have a predetermined color to clearly distinguish the first and second screens in the horizontal or vertical direction. The image quality comparison device according to claim 1, wherein the image quality of the first screen for purging is changed by an external operation. 2. The image quality comparing apparatus according to claim 1, further comprising a switch for vertically or horizontally displaying a vertical bar or a horizontal bar for dividing the first screen and the second screen. ※ Note: The disclosure is based on the initial application.