SU1508272A1 - Device for displaying information on tv indicator screen - Google Patents

Abstract

The invention relates to computing and can be used to display information from a computer. The purpose of the invention is to increase the information content of the device. The device comprises a data input unit 1, a write switch 2, a memory block 3, a read switch 4, a 5-character generator, a video signal generator 6, a video signal switch 7, an adder 8, a television indicator 9, a synchronous generator 10, a decomposition generator 11, a counter 12 elements decomposition, counter 13 characters per line, counter 14 television lines, counter 15 lines of text, register 16 colors, digital-to-analog converter 17, frequency modulator 18, block 19 of EXCLUSIVE OR elements with corresponding links. The input information through the data input unit 1 and the recording switch 2 enters the memory unit 3. In the read mode, under the action of addresses generated by a counter 13 characters per line and a counter 15 lines of text, information from the output of memory block 3 through the switch 4 reads to the 5 character generator, video signal generator 6 and video signal switch 7, which form the outline of the graphic image, and to a color register 16, a digital-to-analog converter 17, and a frequency modulator 18, which form the brightness and color components of the signal, which are converted by the adder 8 into a full television signal for television ion indicator 9. The block 19 of the EXCLUSIVE OR elements and the video signal shaper 6 with the video signal switch 7 provide rotation of the sign contour around the horizontal and vertical axes by 180 °, which allows to increase the information content of the device. 1 il.

Description

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torus 2 records, block 3 of memory, switch 4, read the generator, 5 character generator, video signal generator 6, video signal switch 7, adder 8, television indicator 9, sync generator 10, decomposition generator torus 1 1, counter 12 decomposition elements, counter 13 characters per line, 14 television lines counter, fg counter 15 text lines, color register 16, digital-to-analog converter 17, frequency modulator 18, block 19 EXCLUSIVE OR elements with corresponding links. The input information ts formations through the data input unit 1 and the recording switch 2 enters the memory unit 3. In the mode of sharing with the action of the addresses generated. a counter of 13 characters per line and a 20 count with 15 lines of text, information with

the output of memory block 3 through the read switch 4 is fed to a 5-character generator, a video signal generator 6 and a video switch 7, which form a graphic image circuit, and a color register 16, a digital-to-analog converter 17, and a frequency modulator 18, which form the brightness and color composition signals, which are converted by the adder 8 into a full television signal for a television indicator 9, Block 19 of the EXCLUSIVE OR element and the video signal generator 6 with the video signal switch 7 provide The rotation of the contour of the mark around the horizontal and vertical axes by 180, which allows to increase the information content of the device, 1 slug.

The invention relates to the field of computing and can be used to display information from a computer.

The purpose of the invention is to increase the information content of the device. The drawing shows a functional block diagram of the device.

The device contains a data input unit, a recording switch 2, a memory block 3, a switch 4, a generator, 5 characters, a video signal generator 6, a video signal switch 7, an adder 8, a television indicator 9, a synchro generator 10, a decomposition generator 11, a counter 12 decomposition elements, a counter of 13 characters per line, a counter of 14 television lines, a counter of 15 lines text that. 16 color register, D / A converter 17, frequency modulator 18, a block of 19 elements U1104SP: E OR,

The device works as follows,

In the recording mode, graphic information is entered into memory block 3 from computer input block 1 or using a keyboard. Switch 2 from data entry block 1 receives the address code corresponding to the address on the TV screen of the character being written and the digital code of the input elementary symbol. The entered digital code carries information about the elements of the image contour and color background.

The recording switch 2 transmits the encoder 1n signal of the input character and the address signal to the input of memory block 3 only during the horizontal and frame sweeps backtracking, for which sync pulses from the fifth output of the clock generator 10, Block 3 are sent to the control input of the switch 2 of the record. Memories record digital graphic information on. the address specified by the address code

In the mode of reading information on a television screen, the device operates under the control of a counter 12 decomposition elements, a counter of 13 characters per line, a counter of 14 television lines, a counter of 15 lines of text connected in series, as well as a clock 10, the pulses from the output of the clock 10 are fed to the generator 11 elements of decomposition, start it. During the forward course of sweeps. Thereby, the image elements are tightly attached to the beginning of the television frame and line. The generator 11 of decomposition elements generates pulses with a frequency exceeding the frequency of following the elements of the decomposition of the image. These pulses are applied to the input of series-connected counters 12-J 5 operating in the counting

mode. The current values of the digital codes from the first output of the counter 13 characters per line and the output of the counter 15 lines of text are fed to the first and second address inputs of the memory block 3. These codes determine the current address of the memory location from which information is currently being read.

During the direct course of television, sweeps are capacitive (the black-and-white and color information cells of the memory block 3 of the memory through the switch 4 are read by the signal supplied to the control input of the switch 4 read from the second output of the synchronous generator 10). characters and color register 16. A 5 character generator decomposes - 20 - is formed in the chromaticity channel, the sound of the digital code corresponding to the luminous component of the character, along the television lines (generation of contour symbols) using signals, 14 TV lines through block 19 elements SPL10-. TENDER OR. Block 19 elements EXCLUSIVE OR depending on the value of the control signal, the incoming ZO line, the contour point is shown in the first input from the fourth output of switch 4 scans (the value of the control signal is stored in block 3 of memory for each character), passes codes from the counter of 14 TV lines without changing (which

complies with drawing

characters) or inverts them. Inverting the number codes, the character strings causes the character strings to be 40 17 to form a new color stem in the reverse order of the background. Thereby

color changes the background color of the graphic image. This moment of time is determined by the signal of the point of the contour, which from the output of the video signal switch 7 is fed to the control input of the color register 16. In this case, the information from the output of register 16 of the color in the form of a parallel binary code is rewritten into a DAC

Those. the whole character will be drawn in an inverted vde. Inverted oxen are used, for example, when a tight attachment of a color background to a contour image is displayed. The DAC 17 is a digital code that carries information about

Razhenii objects with a horizontal axis of symmetry. A parallel digital binary code from the output of the 5-character generator is fed to the video signal shaper 6, where using time signals from the first output of the counter 12 decomposition elements, a sequential time scan of the code occurs. The video signal generated in this way carries a capacious, black-and-white information about the image coefficients. Depending on the value of the control signal coming from the third output of the switch 4,

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the globalizer 6 of the video signal is shifted to the right or left, which provides

drawing a character from left to right with (normal character image) either. - from right to left. Such a flip of symbols is used, for example, when displaying objects having a vertical axis of symmetry. At the outputs of the video signal maker 6, two consecutive binary codes are formed (shifted to the right and left), which are connected via the video switch 7 to the input of the sum 15 torus 8, and the video switch 7 is switched by the control signal from the third video of the read switch 4.

Image Color Information

holding the color register 16 consecutively connected, the DAC 17, the first high, whose course is connected to the first input of the adder 8, the frequency modulator 25, 18. The background color code corresponding to the current color and line color test is stored in the color register 16. At the point in time corresponding to that formed along tslevi35

40 17 to form a new color background. Thereby

change the color background of the graphic image. This moment of time is determined by the signal of the point of the contour, which from the output of the video signal switch 7 is fed to the control input of the color register 16. In this case, the information from the output of register 16 of the color in the form of a parallel binary code is rewritten into a DAC.

the background color is tightly attached to the contour image. The DAC 17 is a digital code that carries information about the PCJ

45 bones and the color of the image is converted into a brightness signal U ,, and in turn in two color difference signals.

0

d ,, and Up.gB according to standard

SECAM system volume. For this purpose, the horizontal and frame synchronization signals are supplied to the control input of the DAC 17 from the third output of the clock generator 10. During the flyback on. The frame in the DAC 17 is pulsed and mixed into the video signal, color synchronized. From the second output of the D / A converter 17 1: 1, the light-confined signals U- ,, and d. Reach the frequency modulator 18, where

frequency modulation of signals at two I-frequency frequencies. At the output of the frequency modulator 18, a color video signal is formed, and at the first. DAC I7 output - a capacitive video signal in accordance with the SECAM standard. The generated video signal with information about the graphic image from the output of the video signal switch 7 is fed to the input of the adder 8, the third input of the adder 8 receives synchronization pulses from the fourth output of the clock generator 10, to the first input of the synchronizer 8 The mmator 8 is supplied with a bright video image signal from the first output of the DAC 17, and to the second input of the adder 8 a color video signal is output from the output of the frequency modulator 18, in the adder 8 a full body is formed Vision video signal is supplied to the television kotorgyg indicator 9, which is reproduced and colored graphic.

The use of the proposed device for displaying information on a television indicator in comparison with the known information made it possible to increase its information content by providing the ability to display complex symmetric graphic plots with the same number of alphabet characters by rotating the familiarity matrix around the horizontal and vertical axes by 180..

Claims (1)

Claims An apparatus for displaying information on a television display screen, comprising a data input unit, a recording switch, a memory block, a link switch, a symbol generator, a video driver, an adder, a color register,: A / D converter, a frequency modulator, a generator decomposition elements, decomposition element counter, character counter in a line, television line counter, text line counter and a synchronous generator, the first output of which is connected to the trigger input of the element generator decomposition, the output of which is connected to the counting input of the counter decomposing elements, a first output connected to the clock shaper video signal and the second output {conn much to the count input of counter symbols the first output of which is connected to the first address input of the memory unit, and the second bypass is connected to the counting input of the TV line counter, the first output of which is connected to the counting input of a text line counter, the output of which is connected to the second address input of the memory block, the information input of which is connected to the output of the write switch, and the output is connected to the information input of the following switch, the control input of which is connected to the second output of the clock generator, and the first output is connected to the address input the symbol generator, the output of which is connected to the information input of the video signal generator, the second output of the cross section controller is connected to the information input of the color register, the code of which is connected to the information input of the digital-analog converter, the control input of which is connected to the third output of the clock generator, the first output of the connector information input of the adder, and the second output is connected to the input of the frequency modulator, the output of which is connected to the second information input of the adder, the third inf The input input of which is connected to the fourth output of the clock generator, and the code to the television indicator, the fifth output of the clock generator is connected to the control input of the recording switch, the information input which is connected to the output of the data & input block, the input of which is the information input of the device, about the fact that, in order to increase the informational capacity of the device, it contains a block of EXCLUSIVE OR elements and a video switch, the information inputs of which are connected to the outputs of the video imager, and the output is connected to the fourth information input of the adder and the control input of the color register, the control inputs of the video signal switch and the video signal conditioner are connected to the third switch output schytshani torus, whose fourth output connected to the first input unit ISKLYUCHANSCHEE OR elements, a second input coupled to a second output count television lines, and the output - to the control input symbols generatora-.