KR930024486A - Video signal processing device - Google Patents

Abstract

The present invention relates to a video signal processing apparatus, comprising: dropout compensation means for detecting the presence or absence of a video signal from an input video signal and outputting a signal before 1H during a period in which there is no video signal; Noise reduction means for detecting a correlation between the dropped-out signal, the 1H delayed signal, and the 2H delayed signal, multiplying the 1H delayed signal and the 2H delayed signal by a predetermined proportional coefficient, and then adding the multiplied signals and outputting the multiplied signals. and; Noise canceling means for detecting a noise component from an output signal of the dropout compensating means and subtracting the noise component from an output signal of the dropout compensating means; and adding a 2H delay signal to the output signal of the noise removing means and then halving And vertical contour correction means for detecting a difference component between the one signal and the signal output from the noise reduction means and adding the 1H delay signal of the noise reduction means again. Thus, the number of hardware in the system can be reduced, the unit cost can be reduced, and the signal-to-noise ratio and resolution can be improved.

Description

Video signal processing device

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

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

Claims (5)

A video signal recording / reproducing apparatus, comprising: dropout compensation means for detecting the presence or absence of a video signal from an input video signal and outputting a signal before 1H during a period in which there is no video signal: the dropout signal, the 1H delayed signal, and 2H Noise reduction means for detecting a correlation of the delayed signal and multiplying the 1H delay signal and the 2H delay signal by a predetermined proportional coefficient, and then adding the multiplied signals and outputting the multiplied signals; A noise removing means for detecting noise components and removing noise by subtracting the noise components from the signal output from the dropout compensation means; and a signal obtained by adding a 2H delay signal to the output signal of the noise removing means and then halving it; 1H delay of the noise reduction means by detecting the difference component of the signal output from the noise reduction means. Hameu again adds the number rotsseo video signal processing apparatus comprises a vertical Yun Gwan correction means for vertical contour correction. 2. The apparatus of claim 1, wherein the dropout compensation means comprises: switching means for switching an input signal, first delay means for delaying and outputting the signal by 1H during a period in which there is no video signal among the input signals, and dropout of the input signal. And a dropout detection means for detecting a signal. The method of claim 1, wherein the second delay means for delaying the 1H delayed signal by 1H delayed by the dropout compensation means, the 1H delayed signal and the correlation between the 2H delayed signal and the output signal of the dropout compensation means are detected and a proportional coefficient is obtained. Correlation detecting means for determining the sum, the first multiplication means for multiplying the 1H delay signal and the 2H delay signal by a predetermined proportional coefficient, respectively, the addition multiplier for adding the output of the first multiplication means and the second multiplication means; And a means for processing the video signal. The method of claim 1, wherein the vertical contour correcting means comprises: an output of the dropout compensating means, first adding means for adding a 2H delay signal of the noise reducing means, halving means for halving the added signal, and the halved signal And subtracting means for obtaining a difference in output of the adding means of the adder noise reducing means, an amplifying means for amplifying the subtracted path, and second adding means for adding an output of the amplifying signal and the adding means of the noise reducing means. Image signal processing apparatus, characterized in that. 2. The apparatus of claim 1, wherein the noise removing means comprises: filtering means for receiving the output signal of the dropout compensation means and passing only the high frequency portion, limiting means for passing only the amplitude of the noise component during the output of the filtering means, and the limiting means. And subtracting means for subtracting the output of the input signal router. ※ Note: The disclosure is based on the initial application.