KR910013949A - Signal Interpolation Method and Circuit of Video Equipment - Google Patents

Abstract

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Description

Signal Interpolation Method and Circuit of Video Equipment

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

2 is a recording circuit diagram according to the present invention;

3 is an exemplary diagram of interpolation display according to the present invention;

4 is a regeneration circuit diagram according to the present invention.

Claims (2)

In a playback interpolation circuit using a sub-Nyquist of a video recorder, a preamplifier 21 for amplifying a signal sensed from the playhead 13 and a 629 KHz pass through an output signal of the preamplifier 21. A band pass filter 22 for backpass bandpass filtering, a high pass filter 25 for high pass filtering the output of the preamplifier 21, and a high pass filter 25 for the high pass filter The FM demodulator 26 to demodulate, a de-emphasis circuit 27 for returning the output of the FM demodulator 26, that is, the pre-emphasized signal to its original state, and one horizontal line of the de-emphasis circuit 27. Synchronization is separated from the outputs of the 1H delay circuits 31-32 and 35 that delay the synchronization signals, the multiplier 28 that multiplies the outputs of the 1H delay circuits 31 and 32, and the output of the 1H delay circuit 35. And a delay circuit 3 for delaying the output of the 1H delay circuit 32 by 2H. 0), a 1H delay circuit 32 for delaying the output of the 1H delay circuit 35, 1H, a multiplier 33 for multiplying the output of the 1H delay circuit 32 and the output of the delay circuit 30, Scalers 29 and 36 for adjusting the gain of the outputs of the multipliers 28 and 33, and adders for adding the outputs of the skeletons 29 and 36, the delay circuit 30, and the lH delay circuit 32. 39), a limiter 40 for limiting the output of the adder 39 at a constant level, a level adjuster 41 for adjusting the output level of the limiter 40, an output of the level adjuster 41, A mixer 38 for mixing the output of the synchronous separation circuit 37, a color processing circuit 23 for processing the output of the bandpass filter 22, and a color and mixer 38 for the color processing circuit 23. And a Y / C mixer 24 for mixing and reproducing the luminance of the < RTI ID = 0.0 > In the signal interpolation method of the imager, color and luminance are separated from the signal picked up from the tape, and the luminance signal is de-emphasized after FM demodulation. By varying the delay of the de-emphasized output, the change of the adjacent signal is detected, the change detection value and the delayed signal are added, the black level is cut from the addition to adjust the level, and the color is adjusted. And a reproduction signal is obtained by mixing the levels. ※ Note: The disclosure is based on the initial application.