SU930360A1 - Device for displaying information on television receiver screen - Google Patents

Description

(W) DEVICE FOR DISPLAYING INFORMATION ON SCREEN OF A TELEVISION TELEVISION

I

The invention relates to computing and, in particular, is intended to operate as part of a television information display device using a television indicator screen for presenting information.

Devices are known for displaying information about a graphic form. High-quality graphic images can be obtained by using a random-sampled display device in which deflecting current amplifiers direct the beam of the electron-beam tube (CRT) to any given point, which allows reproduction of signs almost anywhere on the screen.

However, such display devices, which provide complete freedom of movement of the beam and the arrangement of signs, are expensive.

Tokzha, simpler display systems are known that allow high-quality graphics to be reproduced on conventional displays with a television-type raster. 11

The closest technical solution is a display system, which allows displaying marks on a display screen with visual output by selectively recording images with repeated raster scans. The control device causes the generation of video signals-Dp of obtaining sign images simultaneously with the signals for controlling the raster scan so that the characters are displayed in accordance with the address of the cell in which the corresponding sign (graphic) information is stored. The system also contains a shift device that causes video signals to be generated to display certain characters having shift information simultaneously with the signals for controlling the raster scan so that certain characters are displayed in the cells on the display screen that are shifted relative to the specified cells in the direction recording individual scanning lines 2. When systems of this type are used for displaying graphic information, then a fixed placement of characters in Only in one dimension (here along the vertical line), or in cells shifted relative to given cells, limits the accuracy of the display. The accuracy of displaying information in such systems does not satisfy the requirements of a number of specialized information display systems (for example, an air traffic control system) that require a higher accuracy of information display (deviation of individual points from their true value should not exceed the size of a single sampling element which is 0.5 0, 8). The purpose of the invention is to improve the accuracy of mapping. The goal is achieved by the fact that a device containing a computer interface unit, the input of which is connected to the input of the device, the output of which is connected to the first input of the RAM unit, the second input of which is connected to the first output of the control unit, and the output. the input of the character generator, the input of the control unit and the first input of the delay unit, the second input of which is connected to the output of the character generator, the third input to the second output of the control unit and the second input of the character generator, and the output to the first input of the issuing unit deosignals, the second input of which is connected to the third output of the control unit, and the input of the output unit of the video signals is connected to the input of the television receiver, a sign shifter is entered, the first input of which is connected to the output memory unit, the second input is connected to the second output of the control unit, the third input is with the fourth output of the block, the control, and the output with the second input of the character generator. The sign offset unit contains the first register, adder and decoder 04 line number, the register inputs are connected to the first and second inputs of the block, respectively, and the output is connected to the first input of the adder, the second input of which is connected to the third input of the block, and the output is connected to the decoder input line numbers, the output of which is connected to the output of the block. The delay unit contains a second register, a decoder, a multiplexer and a third register, with the inputs of the second register connected to the first and second inputs of the block respectively, and the output to the input of the decoder, the output of which is connected to the control input of the multiplexer, whose information input is connected to the third input block, and the output - to the input of the third register, the output of which is connected to the output of the block, Figure 1 shows the block diagram of the display device; figure 2 - some graphic signs; on fig.Z - a set of graphic characters; in Fig. A, the image of an arc and two intersecting vectors obtained from the set of graphic signs shown in Fig. 3. The device comprises a computer interface unit 1, a RAM unit 2, a control unit 3, a sign offset unit A, a delay unit 5, a generator 6 characters, a video signal output unit 7, a television receiver 8, a first register 9, an adder 10, a decoder 1 1 line number, second register 12, decoder 13, multiplexer 1, third register 15. The device is usually used to display alphanumeric characters in normal cells, i.e. by rows and columns on the screen of the television receiver 8. The RAM block 2 (BOP) is divided into cells, each of which corresponds to a given row cell and column on the screen. Each cell stores one code word representing a alphanumeric character, and each cell displays one character on the screen. For example, the cells in the BEP 2 and the sign cells on the indicator screen can be arranged in 64 vertical columns and 6C horizontal rows to display up to 4096 characters of text on the screen of the television receiver 8. When this type of system

are used to display graphic information, the placement of characters only in the specified cells significantly limits the accuracy of the display. The device can delay and displace individual characters (both graphic and digital-alphanumeric) relative to their specified cells, which is done with the help of block 5 and block, thus providing a clearer display of graphic information. tion, (figure 4).

In a specific example, the food from the given cells on the screen occupies a dot matrix with the size, i.e. 8 points on the horizon and 8 points on the vertical. Image) (the mark is created by selectively recording points in vertical columns of 8 points each (during the tracking of eight vertical scanning lines). Each digital-letter sign is limited to a point pattern in this npfiiMepe scan line is drawn from top to bottom and even and odd lines 4 are interleaved during scanning of {{1) field fields. Thus, 8 vertical lines f sweeping across each square, require ALYA to create an image of a mark in the first tile of the exact matrix size. Usually graphic and shrink the entire dot matrix & t8 g). The Mofyt signs move vertically relative to their given cells and in one of the 512 possible positions for a kg column of vertical column, and also shift to the left by 8, or enpai by 8 positions within the cell, i.e. by 16 points in the horizontal dimension. I -. -.:,. Codes corresponding to the displayed characters are transmitted from the computer to the corresponding computer (all cells in the BOP 2) If the character is to be placed on the screen of the television receiver 8 in a cell shifted relative to the given cell, the delay code is stored in the cell BOP 2, which means one from the previous rows of the same column. The delay code indicates the amount of delay (or svidga) of the corresponding sign downwards relative to the position indicated by the sign code. If the sign needs to be shifted to the left or right on the display diploma.

then the offset code is stored in the previous cell BOP 2 of the same column. The cells in the BOP 2 are read vertically from top to bottom in column 5 simultaneously with the tracking of each scan line. Thus, during each field, each column of cells in BOP 2 is addressed to four consecutive sweep lines. The total number of active scan lines for two fields is 512.

Three different types of code words can be entered into BOP 2.

Code words containing eight

5 binary bits indicate either a alphanumeric graphic symbol or an offset value (see the table. The sixth bit in the alphanumeric or graphic code word is a sign of the level of the sign strength: U is a small amplitude, |; -1 "Pf amplitude. For older bits of the code from BOL 2, signs are established when decoding them:

The sign of the code of the sign is the code of the displacement code, the sign of the code of the shift. In the paccMiaTfmBaeMOM, the television set 8 MOikeT displays the sign with a low or normal level.

Various code words are entered into the BS 2 cell with a computer through block 1 in cooteertteym i.e., the device operating cycle moments, and under control

$ block E kodoa1 "ё words are read from bop 2 and (served on generator ... 6, block 5 block, block 7 in due time, in accordance with the raster scan of the radio receiver 8.

0 Block 3 delivers synchronization signals to BOP 2f to generator 6, block 5 block, block also horizontal spins, timing clock signals for television receiver 8, various clock clocks synchronous with scanning and corresponding placement of the sign or point of the mark. These signals are repeated every 4 cycles of the device during

0 time full raster scan on the screen of the television receiver 8.

The multiplexer k transmits video signals from the generator 6 to the register 15 and is controlled by the decoder 13 in accordance with the delay code word received in the register 12. The register 15 must provide one of the eight (in this particular example) video signal from generator 6, taking into account the delay code. This is a shift register with the number of bits equal to the number of discrete divisions of the cell size on the display screen (eight) plus the number of bits that provide the delay value (from 0 to 31). Let us assume that in this particular example, the video signals from generator 6 are received in bits of register 15 and shifted to the left by 8 bits. After the information is output to block 7, the register 15 is shifted to the left by 8 bits on the screen and, as a result, the higher bits of the register 15 receive the subsequent cell video signals, while the multiplexer I blocks the video signals of the generator 6 to bits register 15, taking into account the magnitude of the delay relative to the given processed cell. Block 7 performs the functions of converting a parallel video signal code into a serial one, combines it with synchronization signals (frame sync and building sync pulses), and switches the amplitude of the video signal backlight according to the sign of a small or normal light amplitude. The conversion of a parallel code into a serial one is performed on shift registers with the number of bits equal to the number of discrete divisions of the size of a cell on the screen in the direction of writing the sweep lines. Two registers are generally used: the main and the additional counterphase; one is filled with codes, the other at this time is used to form the image and vice versa. The shift registers, mixers of video signals and clock pulses, the amplitude switches in Figo1 not shown. Information from the memory will be of three types: delay code, offset code, sign code. If it is necessary to delay or shift the character entering the character code word, the delay code or offset code is entered from the previous memory positions. Therefore, the delay code for the corresponding characteristic from block 2, controlled by block 3, goes to register 12, the offset code to register 9. The sign code entered in the next word goes to generator 6. Thus, by the time the generator arrives 6 code of the sign on the other input of the generator bpok 1 installs the required scanning line using adder 10, calculating the difference of the current line number coming from block 3 on the one hand, code from register 9 on the other, and using the decoder 11, as well as multiplexer control input 1 you the enabling signal from the decoder 13 is inserted. in the presence of zero codes on register 9 or register 12, the character arriving in the character code word will not be shifted or delayed, i.e. displayed in the normal cell. With the arrival of the character code on the generator 6, the video signal code is received in the register 15 and, correspondingly, the time is transmitted to the shift registers of block 7 and further in the video signal stream together with synchronizing pulses, forming a broken video signal, to the television receiver 8. The proposed device (Fig. O, the display mark in the given cell on the television receiver screen works according to the way the alphanumeric text is usually processed.Fig.2 shows an example of the processing of the data stored in the memory cell l p of the first row of the zero column This data is read in due time according to the tracking of the corresponding scanning line on the screen of the television receiver 8 by block 3. In the code word of 8 bits read from BOP 2, the sixth bit is 1 or O, indicating amplitude , the remaining 7 bits denote the digit 5. As block 3 generates a sign of the arrival of a character code word, generator 6 is activated. Information on the current line number from block 3 through block 4 and the sign code from BOP 2 is fed to generator 6, Generators signs are permanent storage devices that, in response to information on the character code and the current line, issue information bits for recording the image in the corresponding point cell of the sign cell. In the example under consideration there is no delay signal, the sign data from the generator 6 will be loaded by the multiplexer into the register 15 in older bits, no shift. The sign information stored in register 15 from the upper 8 bits is transmitted by block 3 in parallel with the frequency of scanning the sign ki into the shift registers of block 7. Eight bits of the sign information are entered into the shift registers of block 7 and sequentially clocked with the scanning speed of the point position for entering into the video stream. Each bit receives 8 stream of video pulses in temporal correspondence with the tracking of the scanning line through the corresponding position of the column of points in a given whose ke on the display screen. The sequence of information bits from the shift registers of block 7 is combined with horizontal and vertical sync signals from block 3 to form a complex video signal on the output of block 7, which is transmitted to television receiver 8 to create an image of the corresponding character column in a given cell. After the completion of the full raster scan, the mark is fully displayed in a dot matrix form in a given cell, as shown in the second row of the zero column in FIG. This device in this way displays graphical signs in given cells on the screen. If alphanumeric characters are limited to a point configuration 57, graphic signs use the entire 8x8 dot matrix (FIG. 3. Since in this example there are no sign offset signals, data about the current scan line (about the column of the sign cell points) is sent to generator 6 through the adder THEN, the decoder 11 of block 4 without modification. Below is a description of the operation of the device shown in Fig. 1 for displaying the sign on the screen in a cell that is shifted relative to a given cell. This is illustrated by the example of code words stored in the left column of the BON 2 scheme and the resulting image of the letter C. shown in Fig. 2. The code word for the C sign is stored in the BOP cell 2 corresponding to a given position on the screen in the first row of the zero column. In the zero row memory cell the zero column is stored the corresponding delay codeword, which indicates that the sign C should be reproduced in the zero column in a cell that is shifted vertically downward from the given cell by eleven point positions. Since the zero-column memory cells are read in time according to the scanning line, the delay codeword is read first and fed to block 3. Block 3 decodes information and enters the First five bits, which indicate the amount of delay, into register 12. The delay code is held in register 2 for a period of time equivalent to tracing the scanning line by eight points (vertical measurement of the sign cell) is decoded by the decoder 13. The output of the decoded | 13 a is connected to the control inputs of the multiplex exora When the delay code is fed to register 12, the next memory cell in the regenerative BOP 2 is read. The indication that this word is a sign that is defined by block 3 permits the passage of the character code C to generator 6, and the information about the amplitude of the backlight is stored in block 3 The code of the sign and information about the current sweep line is fed to the generator 6 with the BOP 2 and block 3 through the block k, respectively. The generator 6 generates the corresponding information bits in the same manner as described above. Since in this example there is no sign offset signal, the data on the current scan line is transmitted to the generator 6 through the adder 10, the decoder 11 of the block without change. The information bits related to the sign C are fed to register 15 by multiplexer 1, shifted to the right by eleven bits in accordance with the unlocking potential from the decoder 13. In this example, the unlocking signal occurs eleven point positions of the sweep movement later than if the delays did not have. Znakova information

qi stored in register 15 from the upper 8 bits is transmitted by block 3 in parallel to the shift registers

unit 7, with the scanning frequency of the sign cell, at the same time follows the shift of register 15 by eight bits to the left. The information bits related to the sign are loaded into the corresponding shift registers of block 7. These bits are synchronously selected from the shift registers with the speed of one bit to write the scan line through one point position and pass through the summation circuit of block 7 (not shown in FIG. 1 ), becoming part of a complex video signal coming in at the television receiver 8.

An example of the sign G in the zero column of FIG. 2 shows that by delaying the information bits for each scan line by eleven point positions, a picture is created in a cell that is located on the screen eleven points relative to a given cell. Figure 2 shows what kind of information, encoded in atopoM (in,::. 3), in the third. The sign L of the columns of the regenerative storage device, creates corresponding reflections on the screen.

The device works in a similar way when processing graphic characters from the first (sign 21), second sign 18), third (sign 16), fourth (sign 15 columns of the regenerative memory, creating the corresponding ie image on the screen of the television receiver 8, giving out the Sfig curve).

. The device can also be used to reproduce two curves that can intersect as shown in Fig. 4 (the intersection of two graphic signs 21 and 2 in the second column of the fifth row). For displaying a mapping, the two delay groups need to be processed simultaneously.

The 18-point delay codeword, which is stored in the second row of the second column, and the codeword for the mark, which is stored in the third row of the second column, are processed during each scan line, yielding the corresponding points for the dotted column, as discussed above for with one delay.

The backword code word for the sign 21 is read from the memory position for the fourth row of the second column, the register 12 is loaded, the code word of the sign 21 is read from the memory position for the fifth row of the second column, transmitted to generator 6 by the method previously discussed. The processing of characters 2 and 21 occurs sequentially: first, the information of character 2 is transferred to register 15,: then there are two left shifts of this register, only after that to the higher bits of register 15 with a shift

information bits of the character 21 are received for one bit. The information bits of characters 2 and 21 are combined in register 15 and then transferred to the shift registers of block 7, into the stream

video signals, displaying two characters, as shown in the fifth row of the second column in FIG. 4.

Below is a description of the operation of the device dp display the sign on the screen, offset from the normal position. This is illustrated by the example of the code layer stored in the first column of the BOP 2 scheme, and the resulting image of the T sign (Fig. 2). As shown in tr.2, the code word of the sign T is stored in the & OL 2 cell corresponding to a given position on the screen in the first row of the first hundred. In the memory cell of the zero row of the first column, the corresponding code word is stored, which indicates that DNA 1 should be reproduced in the first column of the first row, but shifted from the normal to position {4 in the cell on the screen to the right by one dot position, i.e. . on the next TV line.

The current, as the ignoring cells of the first column, is read out in temporal correspondence with the scanning line, the offset codeword is read first. The 3DD block, the high bits of the code word, indicating the offset, and the first five bits, which indicate the offset, are loaded into register 9. The current scan line information from block 3 is fed to the adder 10, to the second input of which the offset code is fed from the register 9. At the output of the adder, the difference is generated between the current scan line code (current

TV line number and offset code. Difference code from exit. The adder 10 is decoded by the decoder 11 and the enabling potential is fed to the input of the generator 6. When the 5 offset code from the BOP 2 is fed to the register 9, the next storage cell in the regenerative BOP 2 is read. Block 3 allows the sign code generator to pass 6, the signal amplitude information is determined by block 3 and fed to block 7. The mark code for the BEP 2 and the number of the television line from the decoder 11 are fed to the generator 6, which outputs the corresponding information bits as described above. The information bits related to the sign are transmitted through register 15 to the shift registers of block 7. These bits are synchronously selected from the shift registers with the speed of one bit to write the CTjJoking scan through one point position and pass through the summation circuit of block 7, become part of the complex video signal coming: on the television receiver 8.

For this example, with a shift code equal to one, the sign T should be displayed one television line to the right of its normal position. At the first column of the points of the sign cell, the adder issues a prohibiting code to the generator 6, at 35 the second column of the points of the sign cell, the adder 10 outputs the code of the first television line, generator 6 - information bits of the sign T on the first television line at the second column of points. For the third point column, adder 10 outputs the code of the second television line, generator 6 outputs information bits of the sign T along the second television line, etc. 5 Thus, when the information bits of the sign are shifted using adder 10 to other television lines, the sign images are shifted on the screen right or left) from the normal 50 position in a dot matrix.

In the second column of the second, yes (FIG. 2), a more complicated variant of the sign A is shown. Code word delay

for a delay of one point, which is stored in the third row of the second column, the codeword of the offset, which is stored in the fourth row of the second column, and the code word for the sign A, which is stored in the fifth row of the second column, are processed during each row scanning, yielding the corresponding points for the dotted column, which was discussed above for the delay options and the offset character case. The processing associated with the delay and the displacement of the sign, occurs separately from one another by the corresponding block 5 and the block without mutual interference. In the resulting image result of Fig. 2), the sign A is mapped to one dot position below and three television lines to the right of the normal position.

FIG. the part of the regenerative memory and the corresponding part of the screen with the image of the arc are presented. The image of the arc uses graphic signs 15, 16, 8, 21, 2kf 26 and 27 from the set of graphic signs shown in Fig. 3 / here, in figure 4, intersecting graphic signs 21 and 2, 7 and 21 ..

  . The use of the proposed display device will significantly improve the accuracy of displaying information on the television display screen by displacing the sign horizontally with respect to its normal location in the cell of the screen. The device allows to select two adjacent graphic characters so as to ensure image fusion. The increased accuracy of displaying graphical information and the shift of alphanumeric characters in any direction, in turn, expands the functionality presented to system users, provides for the expansion of the range of tasks and automated control processes. In addition, in the proposed device, a reduction in the equipment volume is achieved due to the simplified structure of the delay unit.

O 1000 o o o o

About 1 o i 1.11 1

About 11 About About About About About 1 1 11 1 1 1

2nd group of 32 characters with a small amplitude of illumination

Group 2 of 32 characters with normal amplitude of illumination

3- group of 32 signs with small amplitudes of illumination

Character shift codeword

Character delay code word

3- group of 32 characters with normal amplitude of illumination

4- group of 8 characters with a small amplitude. Illumination

A group of 8 characters with a normal amplitude of illumination

16 character offset codes

Claims (2)

32 delays of the sign 17 Formula of the invention 1. A device for displaying information on a television receiver screen, comprising a computer interface unit, the input of which is connected to the input of the device, and an output with the first input of the auxiliary memory unit, the second input of which is connected to the first output of the unit control, and the output - with the first input of the character generator, the input of the control unit and the first input of the delay unit, the second input of which is connected to the output of the character generator, the third input - with the second output of the control unit and the second input signs, and the output is to the first input of the video output unit, the second input of which is connected to the third output of the control unit, and the output to the input of the television receiver, so that, in order to improve the accuracy display, it contains a character offset unit, the first input of which is connected to the output of the RAM unit, the second input - with the second output of the control unit, the third input - with the fourth output of the control unit, and the output - with the second input of the character generator. 2. The device according to claim 1, which reads that the block of the sign offset contains the first register (adder and decoder line number, 0 and the first input of the first register is connected to the first input of the block, the second input - to the second input block and the output to the first input of the adder, the second output of which is connected to the third input of the block, and the output is connected to the input of the line number decoder whose output is the output of the block 3. The device in accordance with claim 1, characterized in that the delay block contains second register, decoder, multiplexer and third register, with than the first input of the second register is connected to the first input of the block, the second - to the second input of the block, and the output - to the input of the decoder, the output of which is connected to the multiplexer control input, whose information input is connected to the third input of the block, and the output to the third register input, the output of which is connected to the output of the block Sources of information taken into account in expert opinion 1. Drabkin RI Formation of alphanumeric and graphic information on a television screen. - Television methods and information display devices. Ed. M.I. Krivosheev. M, .Soviet Radio, 1975. 2. US patent number 3781850, class. Ci About R 3/1, published. 1973 (prototype). X d X to Part V ) S X FIG.