SU1084839A1 - Device for reading and displaying graphic information - Google Patents

Abstract

DEVICE FOR READING AND DISPLAYING GRAIN OF SCREEN INFORMATION containing a television sensor connected to a comparator and a pulse selector connected to a pulse distributor whose outputs are connected to a memory unit, to the first switch, to a pulse generator with one input of a video signal generator, the output of which is connected to the video control unit, with the first counter connected to the pulse generator, and with the second counter connected to the output of the first counter, and a group of switches, differently then, in order to improve the speed of the device, it contains shift registers, the inputs of which are connected to the comparator, to the pulse generator and the first switch, and the outputs are connected to one of the switches of the group, the other inputs of which are connected to the first counter, one-channel. the second counter, with the pulse distributor and the second input of the video signal generator, the third input of which is connected to one group switch, the command signal generator (the inputs of which are connected to pulse loop, with the first counter connected to the first switch and pulse selector, and the output connected to a memory unit connected to another group switch, and the second switch whose inputs are connected to the memory unit and the first counter, and outputs connected with x shift registers. 4 eo 0 x

Description

The invention relates to automation and computing, in particular to devices for reading and displaying graphical information, and can be used to measure the parameters of one-time fast-flowing processes. A device for reading and displaying graphic information is known, comprising a television sensor connected to a pulse distributor and a video signal generator, the output of which is connected to a memory unit through a logic processing unit, a switch connected to the memory unit and to counters, a unit video controls and items, OR l. The disadvantage of this device is its low accuracy. Closest to the invention is a device for reading and displaying graphic information, comprising a television sensor whose output is connected to a comparator and through a pulse selector to a pulse distributor connected to a pulse generator, to counters, to a switch, to a memory unit and to a video signal conditioner the output of which is connected to the video control unit, a group of switches connected to the pulse distributor and logic unit 2J. A disadvantage of the known device is not high enough speed. The purpose of the invention is to increase the speed of the device. The goal is achieved by the fact that a device containing a television sensor connected to, a comparator and a pulse selector connected to a pulse distributor, whose outputs are connected to a memory unit, to the first switch, to a pulse generator, to one input of a video signaling device, is output which is connected to the video control unit, with the first counter connected to the pulse generator, and the second counter connected to the output of the first counter, and a group of switches, shift registers are entered, whose inputs connected to the comparator, to the pulse generator and to the first switch, and the outputs are connected to one of the switches of the group, the other inputs of which are connected to the first counter, a one-shot connected to the second counter of the pulse distributor and the second input of the video signaling device, the third input connected to one group switch, command driver, the inputs of which are connected to the pulse distributor, to the first counter connected to the first switch, and to the pulse selector, and you od connected to the block memory is connected to another group switch and a second switch, and whose inputs are connected to the memory unit and to the first counter, and the outputs are connected to the shift registers. FIG. 1 is a block diagram of the device; in fig. 2-5 - constructive implementation of the pulse distributor, pulse generator, command signal generator and pulse selector, respectively. The device includes a television sensor 1, block 2 video control, comparator 3, selector 4 pulses, distributor 5 pulses, driver 6 video signals, pulse generator 7, first 8 and second 9 counters, one-shot 10, first switch 11, memory block 12, second switch 13, the shift registers 14 and 15, the driver of the command signals 16 and the switch group 17 and 18. The block circuit (Fig. 1) also shows the start bus 19 and the reference bus 20. While the distributor 5 (Fig. 2) contains the elements NOT 21 and 22, the elements And 23-23; the element - OR 26, the counter 27, the element And 28-31; elements OR NOT 32 and 33; trigger 34. The generator 7 (Fig. 3) pulses includes a crystal oscillator 35, triggers 36 and 37; the element OR 38, the divider 39 frequency; performed on the triggers with the combined inputs, the driver 16 (FIG. 4) of the command signals contains the elements HE 40-42; elements And 43, one-shot 44 and 45; the element OR 46, the element AND 47 and 48, and the selector 4 (FIG. 5) contains a limiter 49, elements AND-NO 50-52, element OR-NOT 53, elements NOT 54 and 55, integrating chain 56, triggers 57 and 58 The device works as follows. The signal from the output of the television sensor 1 is fed to the input of the comparator 3, Depending on the video signal level, at the current time point the output of the comparator 3 is 1 (white level) or O (black level). The signal from the output of the television sensor 1 is also fed to the input of the selector U pulses A9 limiter in the selector A selection. No signal Below the black level. At the output of the limiter 49 there are signals corresponding in time to the current pulses, i.e. reverse stroke horizontal and vertical sweeps of the television sensor 1. At the moment of setting the operation mode switch in the distributor 5 to the position Record to inputs Installation About counters 8, 9 and 27, the installation inputs of the trigger 57 and 58 and the input Setting the address register of the block 12 is signaled setting to initial state. When a signal arrives at the second input of selector A, the Start from bus 19 switches the trigger 57, allowing the signals to pass through the IS-NE element 50 and then through element 54 to the integrating circuit 56. The parameters of the integrating chain 56 are selected so that the horizontal cooling pulse The capacitor is insignificantly charged, while the frame damping pulse charges the capacitor to a voltage sufficient to trigger the trigger 58. At the moment of the end of the first signal coming after the start of the frame damping trigger, the trigger 58 em, permitting the passage of signals (lower-case damping pulses from the output of element 50 through the IS-NOT element 52 to the output of the selector 4. At the time of the end of the next frame extinguishing pulse, elements 51 and 53 are applied to the input of the flip-flop 57 in the initial state. Thus, during the time of the forward course of one (following the moment of launch) of the television camera (or the half-frame with interlaced scanning), at the output of the selector 4, pulses are formed, corresponding in time to each forward motion internal scan TV sensor 1. The output pulses of the selector 4 are supplied to a first input of the distributor 5 and via the AND gate 23 (at a position switch REC) are input to the pulser 7. The generator 7 forms a series of pulses with a stable following period, with the help of which the video signal corresponding to the line of the television raster is divided into a given number of elements, for example 356, with the first element tied to the beginning of the line. Counter 8 is configured so that the value of its most significant bit corresponds to the number of bits in each of the shift registers 14 and 15. For example, when there are 16 bit registers, counter 8 must have 4 binary bits. Thus, before entering the input the counter 8 of the first 16 pulses from the generator 7 at the output of the counter 8 will be a signal O, during the arrival of the next 16 pulses, etc. In accordance with the output level of the counter 7, the switch 11 delivers control signals to the inputs of the registers 14 and 15 thus that at signal o on the output of counter 8, the information is shifted to the right in register 14, and when the signal 1 is in register 15. The output signal of the comparator 3 O or 1, the value of which corresponds to the black or white picture element of the waveform read at a given time by the television sensor 1, is fed to the information the inputs (when shifting to the right) of registers 14 and 15. When reading the first 16 pixels of the television line, the values of the output signal of the comparator 3, corresponding to each element, are successively written to register 14 with a generator frequency of 7, the pulses from the output of which are fed to the clock inputs of registers 14 and 15. Thus, in register 14, the distribution of luminance of the first 16 elements of a television line is recorded in a serial binary code. When the 16th pulse arrives from the generator 7, a signal is generated at the output of the counter 8, which arrives at the first input of the imager 16, at the second input of which there is a signal

About with the distributor switch 5 defining Recording mode. Each time the high-order counter 8 is switched from position O to position 1 and back one of the one-shot 45 or 44 is triggered. To eliminate the one-shot 44 when the counter 8 is forced to set to the position O, elements 40 and 43 are used. The output pulses of the one-shot 44 and 45 through the OR 46 element is fed to the AND 47 element. Thus, the shaper 16 generates the Record command received at the control input of the block 12, according to which information accumulated in the register 14 in the form of a parallel 16 bit code is transmitted on through the switch 12 is written into the first memory cell block.

The values of the output signal of the comparator 3, corresponding to the distribution of the frequencies of the next 16 elements of the television line (from the 17th to the 32nd), with the frequency of the generator 7 are sequentially recorded in the register 15. When the 32nd pulse arrives from the generator 7, a signal appears at the output of the counter 8 by which the driver 16 generates the Record command supplied at block 12. The information accumulated in register 15 as a 16-bit word through the switch 17 is recorded in the second cell of the memory block. Next, the process is repeated, ensuring that the luminance information of all the elements of the selected frame is recorded in the memory unit 12.

In the Playback mode, the shaper 16 enters the command. The readout to the control input of the memory unit 12, from the bit lines of which information in the form of a parallel 16-bit binary code through the switch 13 goes to the bit inputs of the shift registers 15 and 14. It should be noted that all the switches and the command generation unit 16 controlled by a signal from the output of the counter 8.

Thus, the first 16-bit binary word coming from memory 12 will be written in register 14, the second in register 15, the third again in register 14, and so on. The control inputs of registers 14 and 15 are supplied with control signals from switch 11 in such a way that during the reading of information from memory block 12 to register 14, information is shifted to the right in register 15 with the frequency of the output pulses of the generator 7 supplied to clock inputs registers 14 and 15, Therefore, at the output of register 15, a signal is generated corresponding to a sequence of ones and zeros (i.e. black and white elements) in the information word received into register 15 from block 12. After the next 16-bit day is converted The first word is triggered by the counter, and the switches 11 and 13 switch registers 14 and 15 so that the information shift begins in register 14, and the next information word from block 12 is written to register 15 through switch 13,

Through the switch 18, switching synchronously with the switch 11, the signals from the outputs of registers 14 and 15 are sent to the shaper 6. The duration of the series of output pulses of the generator 7, which must coincide with the duration of the horizontal sweep in the television system, in the Playback mode is determined by the filling period series-connected meters 8 and 9; the total volume of the counters is chosen equal to the number of split elements of the television line (in our case, 256 elements).

After filling the counter 8, a one-shot 10 is triggered, the output pulse of which corresponds to the duration of the horizontal flyback. The output pulse of the one-shot 10 is fed to the shaper The inverted output pulse of the one-shot 10 (through the element 24) prohibits the operation of the generator 7 for the time of reverse horizontal sweep; whereupon the process is repeated. The counter 27 counts the number of single-pulse 10 pulses. As soon as the number registered by it becomes equal to the number of lines in the frame field (in standard TV mode 288), the output of trigger 34 produces a signal corresponding to a frame damping pulse (reverse frame-scan code) in a television system. This signal is fed to the driver 6. A video signal is generated at the output of the driver 6, corresponding to the distribution of black and white elements in the information read from block 12, and containing horizontal and frame damping and synchronizing pulses. From the inverse output of the trigger 34, the signal enters the driver 16, disallowing command formation Read during frame retraction. After the end of the frame reverse code pulse, the address register of block 12 is set to O (the signal from the OR 26 element), after which the process of reading information from 98 from block 12 is repeated. The output signal of the imaging unit 6 is supplied to the unit 2, which is a television monitor), thus, the information readable from the memory unit is reproduced on the screen. In addition to visual reproduction, digital information from information buses of block 12 as 16-bit words can be transmitted to other devices and devices, for example, to a computer. The introduction of new assemblies and units, as well as new constructive links, made it possible to significantly increase the speed of the device.

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Claims (1)

READING DEVICE AND GRAPHIC INFORMATION DISPLAYS containing a television sensor connected to a comparator and to a pulse selector connected to a pulse distributor, the outputs of which are connected to a memory unit, to a first switch, to a pulse generator, with one input of a video signal conditioner, the output of which is connected to a video control unit, with the first counter connected to the pulse generator, and with the second meter connected to the output of the first counter, and a group of switches, characterized in that, in order to increase speed A device, it contains shift registers, the inputs of which are connected to the comparator, to the pulse generator and to the first switch, and the outputs are connected to one of the inputs of the group switches, the other inputs of which are connected to the first counter, a one-shot connected to the second counter, with a pulse distributor and with a second input of the video signal shaper, the third input of which is connected to one switch of the corpus, a command signal shaper, the inputs of which are connected to the pulse distributor, with the first counter, sub li ne to the first switch, and a pulse selector, and an output connected to a memory unit, connected to another group switch and a second switch having inputs connected to the memory unit and to the first counter, and the outputs are connected to the shift registers.