KR970050839A - Digital V. C. Egg's Equalizer - Google Patents

Abstract

The present invention relates to an equalizer of a digital V.C.R, wherein the first delay unit 200 includes four unit delayers 201, 202, 203, and 204 for unit delaying and outputting a video signal to be reproduced and input. And the delayed video signals k (k-1), k (k-2), k (k-3), which are output from the inputted reproduction video signal k (k) and the unit delays 201, 202, 203 and 204, respectively. multiplier 210 composed of five multipliers 211, 212, 213, 214, and 215 for multiplying k (k-4) by predetermined filter coefficients ω1, ω2, ω3, ω4, ω5 and outputting the multiplier 210; An operation unit 220 for summing output signals, a first level determination unit 230 for discriminating and outputting the output signal of the operation unit 220 as one of predetermined values of three levels, and an output of the operation unit 220. A comparison unit 240 that compares the signal with the output signal of the first level determination unit 230, detects and outputs the error signal, and is provided from the comparison unit 240. Each of the second level determination unit 250 and the output signal of the second level determination unit 250 and the multiplication unit 210 which determine and output the LR signal as one of three predetermined levels of values are output. Filter coefficients ω1, ω2, ω3, ω4, ω5, the input video signal k (k) and the respective output signals k (k-1), k (k-2), k ( k-3), and k (k-4)) to calculate the coefficients of the filter (ω1, ω2, ω3, ω4, ω5) and the coefficient updater 80 for providing the multiplier 210, In this case, the filter coefficient can be updated by a simpler operation.

Description

Digital V. C. Egg's Equalizer

As this is a public information case, the full text was not included.

2 is a block diagram showing an equalizer of a digital V. C. egg according to a preferred embodiment of the present invention.

Claims (1)

A digital V. C. equalizer for preventing distortion of a reproduction waveform due to interference between reproduction signals recorded at high density during reproduction of recorded data, wherein a predetermined number of delays for delaying and outputting a reproduced and input video signal are provided. A delay unit 200 formed of a group; A multiplier (210) for multiplying each delayed video signal output from the delay unit (200) by a predetermined filter coefficient; An operation unit 220 for summing and outputting respective signals provided from the multiplication unit; A first level discriminating unit 230 for determining three levels of the output signal of the calculating unit 220 and outputting a predetermined level signal according to the three levels; A comparison unit 240 for comparing and calculating the output signal of the operation unit 220 and the output signal of the first level determination unit 230 to detect and output the error signal; A second level discriminating unit 250 which discriminates and outputs an error signal provided from the comparing unit 240 as a predetermined three level signal; The respective output signal of the second level determination unit 250, the respective filter coefficients provided from the multiplier 210, the input video signal and the respective output signal of the delay unit 200 are calculated And a coefficient updater (260) for updating the respective filter coefficients and providing them to the multiplier (210). ※ Note: The disclosure is based on the initial application.