SU544396A3 - Combat suppression device - Google Patents

Description

(54) APPROACH FOR COMBINATION OF COMBINE EFFECT

I

The invention relates to television and can be used when recording television images on film.

A device for suppressing the effect is known, comprising delay lines for the time of one line, half-frame, differences of time of half-frame and line to the inputs of which a video signal is simultaneously supplied, the output of the delay line for the time of one line being connected to the first comparator, to the second input of which a video signal is output the delay line at the time of one half-frame is connected to the second ‑ comparator, the second input of which is connected simultaneously to the output of the delay line of the time difference between the half-frame and the line, and the third comparator, to the second input the video signal is supplied, and the output is connected to the first gating unit, the second input of which is connected to the output of the second comparator, and the output is connected to the second gating unit, the second input of which is connected to the output of the first comparator, scanning unit.

However, the known device has a combo effect when recording TV images of a moving object and resulting in

Reducing the sharpness of the recorded image is not effective enough.

The purpose of the invention is to improve image clarity.

For this, the video signal is also fed to the first delay line, the output of which is connected simultaneously through the second delay line to the first input of the first selector and to the first input of the second selector, while the outputs of the delay lines at the time of the half-frame and the time difference of the half-frame and the line are simultaneously connected to the third delay line, the output of which is connected to the second input of the second selector, connected by the third input to the output of the second strobe unit, and the output to the second input of the first village vector, the third input of which is connected to the unit scan. Figure 1 shows the structural electrical circuit of the device; in fig. 2 - scan of the image signal (A is the main recorded line). In the presence of a com-effect between vertical dash-dotted lines, the following is true; line A is analogous to line B (both black), line analogs of sha line D (both white) and

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; st} eoka A is derived from line C (line A is black and C is white).

In the background area to the left of the combo effect area, all the lines are white, and in the object area to the right of the combo effect zone, all the lines are black.

The device for suppressing the combo effect contains a delay line (LZ) 1 for the time of one line, LZ 2 for the half-frame time, LZ 3 the difference between the times of the half-frame and the line, the inputs of which are connected to the input 4 of the device, the output LZ 1 connected to the first comparator 5, the second input of which is connected to the input 4 of the device. Output LZ 2 is connected to the second comparator 6, the second input of which is connected simultaneously to the output of the LS 3 and to the third comparator 7, the second input of which is connected to input 4 of the device, and the output is connected to the first gating unit 8, the second input of which is connected to the output the second comparator 6, and the output with the second gating unit 9, the second input of which is connected to the output of the first comparator 5. To the input 4 of the device is also connected the first LZ 10, the output of which is connected simultaneously through the second LZ 11 to the first input of the first selector 12 and from the first the output of the second selector 13, while the outputs LZ 2 and 3 through the respective fixing amplifiers 14 and 15 and connected in series with the resistors 16 and 17 are simultaneously connected to the third LZ 18, the output of which is connected to the second input of the second selector. 13, the third input to the output of the second gating unit 9 and the output to the second input of the first selector 12, the third input of which is connected to the scanner unit 19, the output of the first selector 12 is the output 20 of the device.

The device works as follows.

The TV signal is continuously fed to input 4. Yes. If this signal is delayed by one line interval in LZ 1, it forms line B, for one interval half-frame - in LS 2, forms line O, k on time interval of half-frame and line - in LS 3, form line C. A television signal, coming from input 4 without a back panel, forms the main line A. The liaity of lines A and B is established by comparing them at comparator 5. Any gap between lines A B (regardless of sign) is fixed by a control signal produced by comparato rum 5 and the trend of this difference. The control signal from the output of the comparator 5 is received) ia the second gating unit 9. The similarity of cTjWK C and D is recorded by the second comparator 6, kch) tori11 produces a control signal, written on the psvrb gating unit 8.

The difference is set by the third comparator 7, which converts any difference (regardless of sign) between them into a control signal proportional to this difference and fed to the second selector 13. The gating blocks 8 and 9 and the selector 13 do not g until But control signals do not notice a discrepancy of sufficient magnitude to cause a visually noticeable combo effect; Line delay 11 compensates for the corresponding signal delays in selector 13 in IQ resistors 16,17 and in fixing amplifiers 14,15 in order to guarantee a temporary match between the two input signals in selector 12. The difference between lines A and C leads to the presence of a control a signal from the output of gating block jg 9, which actuates the second selector 13, which selects a combination of rows D and C for transmission to the first selector 12. In the absence of any control signal, the selector 13 selects an input corresponding to line 2Q A and delivers it to the selector 12.

As long as lines A and B, C and D are similar, control signals from Comparators 5 and 6 are absent, while gating blocks 8 and 9 allow the control signal to pass unhindered (if present) from the output of the latter. However, if the similarity between lines A and B, C and D is broken, then the gating unit 8 or 9 is driven by the control signal from the output of comparator 5 or 6, which blocks the passage of the control signal from the output of the gating unit 9 to the selector 13. Thus, the combination of lines D and C is replaced by the main line A only when there is a similarity between lines A and B, C and D, the difference between 5 lines A and C, i.e. thus, the presence of a combo effect is determined.

The first selector 12 is controlled by the sweep unit 19, which selects the input of the selector 12 corresponding to row A during sweeps of an even Q half-frame, and another input corresponding to the combination of rows O and C in the effect zones, and row A at other places during even sweeps half frame

Thus, the television signal at the output 5 of the device 20 turns out to be almost equal to the sharpness of the television signal at input 4, but in the absence of a combo effect. The individual Hapymeirae remaining in the image is a slight blurring at each end of the horizontal moving horizontal border, but due to the movement of the border, the low blurring is imperceptible to the eye, even when shown on a large screen.

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Claims (1)

Invention Formula A device for suppressing a combo effect, containing smmm delay for the time of one line, half-frame, time difference of half-frame and line, to the OUTPUT of which a video signal is simultaneously delivered.