SU1376270A1 - Object signal extractor - Google Patents

Abstract

The invention relates to a TV technique and improves the reliability of the selection of an object signal. The device contains an OR 1 unit, a level-binding unit 3, a band-pass filter 4, a tuning unit 5, a threshold unit 7, and a converter 8, the duration is voltage. The sample-storage block 2, the delay block 6, are newly introduced. To increase the accuracy of work and expand the dynamic. The input signal range in the device uses adaptive level binding in block 3, controlled by the output voltage of the converter 8. The increase in the reliability of the object signal selection occurs due to the fact that sharp transitions associated with the horizontal and frame sync pulses are excluded from the input video signal. 2 il. (5 (L

Description

The invention relates to a TV-OHHofi technique and can be used in the composition of television systems for automatic tracking of objects.

The purpose of the invention is to increase the reliability of the selection signal object

FIG. 1 shows a structural electrical circuit of the device; in fig. 2 - time diagrams that show his work.

A device for signaling an object (Fig. 1) contains an OR element 1, a sampling-storage unit 2, a level clamping unit 3, a band-pass filter 4, a gating unit 5, a delaying unit 6, a threshold unit 7 and a duration-voltage converter 8.

A device for extracting an object signal operates as follows.

Coming to the inputs of the element SHSh 1 personnel (Fig. 2a) and lowercase (Fig. 25). the sync pulses are converted into a snapshot (Fig. 2B), further fed to the control input of the sampling-storage unit 2, to the information input of which a full television signal is received (Fig. 21}, in which it is necessary to record the presence or absence of a signal about In the transfer of block 2 during personnel or horizontal sync pulses to the storage mode, a video signal free of synchro pulses (smoother, fig. 2) is formed at its output. After eliminating the additive interference in block 3, the video signals l is filtered by a band-pass filter 4, the characteristic of which is matched with the parameters of the extracted signal. As a result, a signal is generated at the output of the band-pass filter 4 (Fig. 2e), which contains smoothed emissions from residual transitions occurring during the transition of samples, as well as the information component of the input signal (conventionally shown in the middle of the active part of the frame).

In order to eliminate outliers, the signal after the clock sync pulse (FIG. 2

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is processed by gating unit 5, which is locked by a control input by a signal (Fig. 2g) formed by a block-6 of a delay from frame sync pulses. The output signal of block 5 (fig. 2 i) goes further to the input of threshold block 7, which is converted into a square pulse (fig. 2 and), the duration of which depends on the ratio of the amplitude of the desired signal and the threshold value of threshold block 7. To increase accuracy the operation and expansion of the dynamic range of the input signal in the device uses an adaptive level binding in block 3, controlled by the output voltage of the transducer 8 duration-voltage.

Thus, the proposed device allows to increase the reliability of the selection of the object signal for, cxieT, that abrupt transitions associated with the horizontal and vertical sync pulses are excluded from the input video signal.

Claims (1)

Invention Formula A device for isolating an object signal, comprising a series-connected level-attachment unit, a band-pass filter, a gating unit, and a threshold unit, the output of which is the output of the device and, through a duration-voltage converter, is connected to the control input of the level-binding unit, and the OR element, the first and second inputs of which are, respectively, the inputs of the frame and line sync pulses, characterized in that, in order to increase the reliability of the object signal, the sample-and-hold unit and the delay unit connected between the first input of the SH and control unit are entered At the same time, the output of the OR element is connected to the control input of the sampling-storage unit, whose information input is the output of the device, and the output is connected to the input of the level lock block. at  t JUUL JlJUlJlfLfULflJL ii.juuuLrum. and t Phie, 2