SU1515396A1 - Device for shaping video signal of inclined lines - Google Patents

Abstract

The invention relates to television technology and can be used as part of a generator of test signals and special effects. The purpose of the invention is to simplify the device by eliminating a logic unit, two triggers and a delay element. The device contains a synchronous generator 1, three counters 2, 3, 4, the element AND 5 and the input element OR 6. The generated signal of the device is mixed with all the necessary service pulses (for example, damping pulses and sync pulses). In this case, the video signal of the wedge is formed with lines having a variable thickness proportional to the width of the wedge in the current line. If it is necessary to have lines of constant thickness, the output signal of the device should be normalized in duration / for example, using a single vibrator connected to the 1 output of counter 4. 1 sludge.

Description

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The invention relates to television technology and can be used as part of test signal and special effects generators.

The purpose of the invention is to simplify the device by eliminating a logic unit, two triggers and a delay element.

The drawing shows a structural electrical circuit device

A device for forming a video signal of inclined lines contains a synchronous generator 1, the first 2, the second 3 and the third 4 counters, the element AND 5 and the element OR 6 "

A device for forming video CHi iiajia oblique lines works as follows

During the active part of each field, a pulse is generated at the output of the frame frequency of the synchronizing generator 1, which performs the initial setting of the first counter 2. Recording in nepBbri i counter 2 code corresponds to the number of lines in which the video signal of the inclined lines is formed. And 5 forks the level of the log. O, which is fed to the counting input input of the first counter 2 and to one input of the element OR 6, the other input of which receives the frequency pulses of rows with an active low level from the output of the clock generator 1. The pulses from the output of the element OR 6 arrive at the input of the installation of the third counter 4, the second output of which at the same time establishes the level of a log O, allowing the operation of the second counter 3. From this moment on, the second counter 3 starts counting the clock pulses from the corresponding output of the clock generator 1 o This second counter 3 is determined by the code at its information inputs and determines the interval between the pulses of the video signal of the inclined lines during the row. Since for each row the code value at the bit outputs of the first counter 2 changes by one (the increment sign determines the direction of the vertical lines), the second counter 3 for each successive row generates at its output pulses with a different period, the output signal of the second the counter enters the counting input of the third counter 4, from the first

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the output of which, being the output of the youngest bit, removes the output video signal. The count factor 2 of the third counter 4 determines the number of slant lines in the video signal, and the position of the first slant line in the first row is determined by the delay of the line frequency pulses of the sync generator 1 relative to the horizontal sync pulses

At the moment of overflow of the third counter 4 at its second output, a log level of about 1 is formed, blocking the operation of the second counter 3 before the arrival of the line frequency pulse at the input of the installation of the third counter 4 in the next with string c.

When the first counter overflows

0 2 (the achievement of a certain value decrypted by the element And 5) and the output of the element 5 forms a log level. 1, the blocking element I.PI 6 and the first counter 2. Thus

5, the operation of the device is blocked until the next floor,.

Then, the output signal of the device is mixed with all necessary service pulses (for example, long pulses and sync pulses). In this case, form ;: the video signal of the wedge with lines having a variable width proportional to the width of the wedge in the current line.

5 If necessary, have a line of constant thickness of the output station: the device gial should be normalized in duration (for example, using a single vibrator connected to the first

0 to the output of the third counter 4) „

Claims (1)

Invention Formula A device for forming a video signal of inclined lines, containing from the synchronous generator, a first counter, the bit outputs of which are connected to the information inputs of a second counter, the output of which is connected to the counting input of the third counter, the first output of which is the output of the device, as well as the AND element differing from that, in order to simplify the device by eliminating a logic unit, two triggers and a delay element, an element of an VF is inserted into it, the first input of which is connected to the output of horizontal frequency pulses rotogenerator, the second input is connected to the input resolution five 51515396f the counting of the first counter and the output clock generator, the outputs are the synchrodium of the element I, and the output is connected to the pulses and pulses of the frame frequency the input of the installation of the third counter, which are connected respectively The second output of which is connected to the input with the counting input and the installation input of the counting resolution resolution of the second counter-first counter, the bit outputs ka, the counting input of which is connected to which is connected to the inputs by the output of the pulses of the clock frequency AND „