SU1444878A1 - Device for output of information onto television indicator screen - Google Patents

Abstract

The invention relates to automation and computing and can be used to display information on a television display screen. The purpose of the invention is to increase the information content of the device, which is achieved by the introduction of switch 6, the third counter 5, memory block 7 and the corresponding functional links. The invention allows the formation of single and repetitive, single and repetitive curves superimposed on the generated television image. I il. % (L

Description

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The invention relates to automation and computing and can be used to display information on a television display screen.

. The purpose of the invention is to increase the information content of the device.

The drawing shows a block diagram of the device.

The device comprises a pulse generator 1, a first counter 2, a synchronization unit 3, a second 4 and a third 5 counters, a switch 6, a memory block 7, a comparator 8 and a video mixer

The device works as follows.

Suppose that it is necessary to reproduce or superimpose a curved line on an image,

First, in block 7 of memory, having an organization (m is the number of binary digits of the number expressing discreteness per line; 1 is the number of television lines on which the curve points will be located), write the ordinates of the curve one in each line. For this, the memory block 7 is converted by control signals

in the recording mode, and the switch 6 - in the transmission mode of the clock recording pulses. The third counter 5, as the clock pulses arrive, changes its state and addresses of the selected memory cells. At the same time, the information inputs of the memory block 7 are supplied with the ordinates of the curve in binary code, which are written into the corresponding cells. Counter 5 has a conversion factor of 1,

After 1 sample has been recorded in memory block 7, it is transferred to the transmit mode and the switch 6 to the transmit mode of the horizontal sync pulse (FID), the control signal is sent to the reset input of the counter 5. frame sync pulse (XSI), Counter 5, according to signals from the FID, counts the rows. Selecting information from the memory block 7 about the position of the coordinates of a point on the row in binary code is compared in 1 ommparator 8 with the state of the first counter 2. Counter 2. accumulates generator pulses 1, giving out in two code, the current position of the beam in the line. As soon as the current coordinate coincides with the position of the coordinate

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the points in the row read from memory block 7, the comparator 8 generates a signal. The duration of the signal is determined by the duration of the pulses arriving from the low-order bit of counter 2. Further, the signal from comparator 8 is superimposed on the image via video mixer 9. On the next line, the process is repeated, and a curve is formed from the displayed on each line of points, the coordinate axes of which are rotated 90 ° relative to the screen axis. Using signals from the first 2 and second 4 counters, the synchronization unit 3 generates XI and SII,

The number of samples per line is determined by the resolution of the first counter 2, If the counter is n-bit dny, then the number of samples is 2,

The use of a t-bit () comparator makes it possible to get one point on a line with g n, two or more points on a line, and therefore several repetitive curves with coordinate axes rotated 90 °

Thus, the invention makes it possible to extend the field of application of the device due to the possibility to form single and repetitive: points, single and repetitive, superimposed on the formed television image,

Claims (1)

Invention Formula A device for displaying information on a television indicator screen containing a pulse generator, first and second counters, a synchronization unit, a comparator, a video mixer, the output of a pulse generator is connected to the counting input of the first counter, the outputs of the first counter are connected to the information inputs of the first comparator group, the overflow output of the first counter connected to the counting input of the second counter, the outputs of the second counter are connected to the control inputs of the first group of the synchronization unit, the control inputs of the second the groups of which are connected to the corresponding outputs of the first counter, the first output of the synchronization block is the output of the device for connection to the horizontal sync pulse of the television indicator, and the second output is the output of 34448784 Connections for connecting to the frame input is the clock input for recording television clock synchronization pulses, the switch output is connected to the indicator, the comparator output is connected to the third input of the counter, the key to the first information output of which is connected to the input address of the video mixer, the second information input the memory unit, the input of which the input input is the input of the third counter is the input of the device’s video signal, the output of the device’s initial setup, the output of the video mixer is the output of the device The dunks of the memory block are connected to the information for connecting the video inputs of the second group of the comput tv indicator to the video input, about the TL and the ra- tor, the information inputs of the block are so that they are informational inputs of the device, the device, the address input of the com- bus contains a switch, the third counting mutator is the first control switch, the memory block, the first information input of the device, the control input input of the switch is connected to the per-memory blockthe output of the synchronization block, the second input of the device, the swarm of the information input of the switch.