SU720801A1 - Device for presenting alphanumeric and graphical data - Google Patents

Description

one

The invention relates to radio engineering and can be used to construct radio-type alphanumeric and graphic displays with information display. on a standard television display.

A device for displaying alphanumeric and graphic information is known, comprising sequentially included character code generator, mixer, memory unit, character generator and image generator, a synchronous generator, the input of which is supplied with a synchronizing signal, the first, second and third outputs of the synchronous generator being connected respectively to the second input of the character generator, the first input of the readout counter, to the input of the mode control unit, the output of which is connected to the first input of the character code generator, and the second input of which is signal information 1.

However, this device has a low accuracy of information reproduction.

The purpose of the invention is to improve the accuracy of information reproduction and increase the speed of the device ..-, .., -.,. ,,

To do this, the device for displaying alphanumeric and graphic information containing sequentially included character code generator, mixer, memory block, character generator and image maker, power synchronizer, the input of which is supplied with a synchronizing signal, the first, second and third sync generator outputs connected respectively to the second input of the character generator, the first input of the readout counter, to the input of the mode control unit, the output of which is connected to the first input of the character code generator, A second input signal is fed to an information signal, a serially connected code converter, connected by an input to a second output of a memory unit, a coding block, to a second input of which signals from digital information sensors are supplied, and a signal recording selector, an output of which is connected to a second input of a mixer, are entered, and the second input is with the second output of the mode control unit, the third output of which is connected to the second input of the memory unit, the switch connected by the output to the third input of the memory block, the comparison element connected Exit bhodom a second imager, a third input kotrOgb soediyey a fourth output mode control unit, a fifth output is connected to the first input of the switch, the second and third inputs connected sootvetstvenys first and second inputs; element. comparison, the write counter, the input and output of which is connected respectively to the sixth output of the mode control unit and the second input of the switch, and the seventh output of the mode control unit is connected to the second input of the read counter, the output of KOtopbro is connected to the third input of the switch.

The drawing shows a structural electrical circuit of the proposed device.

The device for displaying alphanumeric and graphic information contains shaper 1 of character code, mixer 2, memory block 3, 4 character generator, image shaper 5, synchronous generator 6, mode control unit 7, read counter 8, code converter 9, coding unit 10, selector 11 entries, a switch 12, a comparison entry 13 and a write counter 14.

The predlozhennoe device operates as follows.

The former 1 is intended to form or convert a character code into a code conveniently written to the memory unit 3. Most often this is a keyboard type set device. In addition, the driver allows the control of characters by issuing appropriate commands from the control unit 7.

Input data can be entered in the form of a particular code, as well as in coded form using punched tapes, punched cards, magnetic tapes and other means.

The work is connected with the participation of the operator, who performs the input of data by typing on the keyboard various taktov, numbers, images.

The memory block 3 is a block of long-term memory, which allows to store character information in the interval between update cycles for entering the electronic computing machine (computer) and the display on the television indicator, the memory block 3 is built so that when working from sensors, Static information was overwritten only by signals from sensors.

The reading of the sign information is as follows. When the first line of the television raster is drawn, in section T, p, switch 12 sends a read address signal to the address widths of memory block 3, a parallel binary character code appears written in the cell

Memories with: mip address. Further movement of the beam along the 1st line, synchronously with it, alternately forms the address and reads it from the memory cells, mjp, and so on.

5 Scribing the 2nd, 3rd ...., 8th line (with the character on 8 lines) repeats the process of reading from memory 3. A similar frequency will occur when reading the 9th - 16th line and so on. In other words, the code of characters located horizontally is read as many times as there are lines in the signed rectangle (familiarity).

With interlaced scanning, the same effect is observed after each half-frame. Code combinations of characters are fed to generator 4, which generates an image video signal corresponding to one or another character. In addition to the code combinations of the characters of the input generator of the generator 4, the signals of the digital function of the discretization of the elements of the sign taken from the output of the clock of the synchronous generator 6 are received. records

, for playback and vice versa, and if necessary, include input into the computer, or erasing the information recorded in memory block 3. In addition, control unit 7 allows switching inputs of counter 14 and thereby changing the way information is written in memory block 3 .

The counters 14, 8, depending on the selected mode (write for reading information), allocate the corresponding bit pulses to the switch 12, which switches these signals to one common address input of the memory block 3.

Comparison element 13 operates according to the bit balancing principle, producing pulses with equal number of counter codes 8 and 14.

At the output of the reference element 13, a pulse signal is generated that is modulated in phase with respect to the synchronization pulses of the sweep. Logical multiplication of this signal (for example, a flickering loudness mark or brackets that delimit a signed rectangle) with a sign allows the resulting image to be used as a mark of that significant rectangle in which you can write

0 or erase one or another sign. The formation of such an image and summation with the other signals is carried out in the imaging unit 5 before the video signal is supplied to the television indicator. A signal from the output of the memory block 3 can be supplied

into a communication channel or computer.

Claims (2)

The clock generator 6 generates not only synchronization pulses, but also controls the operation of the remaining blocks. At the same time, it generates digital functions of discretization of the raster on familiarity and elements, and also produces a burst of pulses, the number of which is equal to the number of memory slots of the memory 3. This enables the corresponding mode of the device to read the information recorded in the memory 3 at a speed over a wide range, to output information to other devices ... The clock generator 6 should provide the ability to work both in standalone mode and in the mode of forced synchronization. The forced synchronization mode is convenient in that it allows displaying the generated alphanumeric information against a television (TV) image background, as well as transmitting data recorded in memory block 3 synchronously with the TV signal speed. It is also possible to transfer data by a packet of pulses, the temporary position of which corresponds to the time of transmission of the selected line of reverse stroke of the TV sweep. Naturally, in order to accomplish the maximum compression of the TV signal in this way, information should be read from the cells of memory unit 3 once. In the autonomous mode of operation of the synchronous generator 6, the speed of reading information from the memory unit 3 can be significantly reduced. At the same time, it is possible to transmit data on a single-band (telephone or telegraph) communication channel. In the process of recording information in memory block 3, in addition to the symbol code, color code, brightness code, and so on, the sensor number code is recorded. If the number of sensors is N, not exceeding 16, the sensor code will be a four-digit binary number, with N 32 - five-bit, and so on. Naturally, the same sensor number code is recorded in the memory cells of 3 different elements controlled by one sensor. The format of the data that takes place at the output of the memory block 3 is divided into groups containing the information (character code, color code to so on) and the address part including the sensor number code. The binary code of the sensor number from the second output of the memory block 3 is fed to the input of the converter 9, which converts the binary code to one of N. The signal group taken from the sensors is switched by the pulses of the converter 9 and through the selector 11 goes to the mixer 2. The sequence of recording signals from the imaging unit 1 or the selector 11 is controlled by pulses from the output of the control unit 7. At the same time, the operation logic of the selector 11 must ensure the recording of signals when there are signals from sensors and a space when these signals are excluded. However, the gain in the capacity of the memory block ;; Ti 3 is not the only advantage of the proposed device. Thus, the use of new elements can significantly improve the accuracy of information reproduction and improve the speed of the device. Claim device A device for displaying alphanumeric and graphic information containing sequentially included character code generator, mixer, memory block, character generator and image generator, sikh generator, to the input of which a synchronization signal is fed, with the first, second and third outputs of the clock generator being connected to the second one the input of the character generator, the first input of the readout counter, to the input of the mode control unit, the output of which is connected to the first input of the driver Signs, to the second input of which the information signal is supplied, characterized in that, in order to improve the accuracy of information reproduction and increase the speed of the device, sequentially included code converter connected by the input to the second output of the memory unit is entered, the coding unit, to the second input of which are fed signals from digital information sensors, and a signal recording selector, the output of which is connected to the second input of the mixer, and the second input - to the second output of the mode control unit, the third output of which is connected The second input of the memory unit, a switch connected to the third input of the memory unit, a comparison element connected to the second input of the imaging unit, the third input, which is connected to the fourth output of the mode control unit, the fifth output of which is connected to the first input of the switch, the second and third inputs of which are connected respectively to the first and second inputs of the comparison element, the record counter, the input and output of which is connected respectively to the sixth output of the mode control unit and to the second input ommutatora and seventh output mode control unit is connected to the second input of the read counter, whose output is connected to the third input of the switch. Sources of information taken into account during the examination 1. I. Guglin. Formation of signs on television indicators. M., Energie, 1974, fig. 30 (prototype).