SU978186A1 - Device for displaying data on tv receiver screen - Google Patents

Description

The invention relates to automation and computer technology, as well as to printing, and can be used in the construction of television displays for displaying and editing text information using standard television receivers.

A device is known comprising a block for generating symbol element codes, a memory block connected in series, a character generator and a shift register connected to a television receiver, a clock pulse generator associated with a controlled frequency divider, field trigger and line counter, the outputs of the line counter being through, the switch being connected to decoder Strok connected to the character generator. The television screen is divided into a certain number of characters for the minimum character size (size 1)> The number of memory block addresses is equal to the total number of characters. Symbols having a size of 1,2,4 or 8 occupy 1,4,16 or 64 characters, respectively, on the screen, i.e. the linear dimensions of the symbol increase ¹ respectively 2.4 or 8 times.

The block of Generating codes of symbol elements, depending on the size of the symbol * 1,2, 4 or 8, records a specific symbol at 1,2, 4 or 8 addresses of the memory block, respectively. In addition, depending on the ft signal of size, the controlled frequency divider changes the repetition period of clock pulses arriving at. shift register [1].

However, this device allows you to play only one-width characters with a twofold change (increase) in size.

The closest technical solution to the proposed one is a device containing a memory unit, some outputs of which are connected to the character generator and decoder of the line offset command, while others are connected to a size decoder, to the control inputs of the controlled frequency divider lines, the first block of OR elements, the switch and the second block of elements> OR, with inputs connected to the character generator, a synchronizing pulse generator, the input of which is connected to the count to the current input of the line counter and to a series-connected controlled frequency divider, a shift register and a television receiver, a frequency divider, an input which is connected to the output of a controlled frequency divider, and the input to the polling input of the memory block by signs, decoder '' 0 ' ', the inputs of which are connected to the outputs of the line counter, and the output is connected to one input of the circuit AND, the other input of which is connected to the output of the decoder of the line offset command, and the output of the circuit And is connected to the control input of the block of the circuit And and the input of the bl memory in rows, the outputs of the size decoder are connected to the control inputs of the switch, the outputs of the character generator are connected to the inputs of the shift register.

The device allows you to change simultaneously the __ height and width of the displayed characters (sign fields) according to the character size code. The horizontal size is changed by changing the division ratio of the controlled frequency divider, which forms shear pulses for the shift register [2].

However, the known device allows reproducing characters of only one width for each selected size 30, therefore, it cannot be used for large-scale display, for example, for typographic text, since the characters of a typographic font are known to have different35 widths at the same height.

The purpose of the invention is the expansion of the scope of application of the device due to the formation of characters of different widths.

This goal is achieved by the fact that before the device contains a first connected memory block, a character generator, a shift register connected to a television receiver, a line counter, a first decoder, a first block of OR elements, a switch and a second block of OR elements, the outputs of which are connected to the other inputs of the character generator, a second decoder, the inputs of which are connected to the inputs of the first decoder and the outputs of the line counter, one of whose inputs are connected to the corresponding outputs of the unit And elements, one input of which is connected to the corresponding outputs of the first memory block, another input of the block of elements And is connected to one input of the first memory block and the output of the first element And, one input of which is connected to the output of the second 60 decoder, and the other input to the output of the third a decoder, the inputs of which are connected to the corresponding outputs of the first memory block, a fourth decoder, the outputs of which are sub-keys to other inputs of the switch, and the inputs are connected to the corresponding other outputs of the first memory block and one and inputs of a controlled de-frequency divider, a clock generator connected to another input of a line counter and another input of a controlled frequency divider, the output of which is connected to one of the inputs of the frequency divider, a second memory block is introduced, subtracting the counter, fifth decoder and the second element And , one input of which is connected to the output of the controlled frequency divider, the other input is connected to the output of the fifth decoder, another input of the first memory unit and another input of the frequency divider, the output of the second element And is connected to one input house subtracter counter, whose other inputs are connected to respective outputs of the second memory block, the inputs of which are connected to respective outputs of the first memory unit inputs character generator and a third input of the decoder, the outputs of down counter connected to respective inputs of a fifth decoder.

In FIG. 1 presents a structural diagram of the proposed device; in FIG. 2 - reproducible signs * T ¹¹ and W, taken as an example, and timing diagrams of pulses at p = 3. .

The device contains a first memory unit 1, a character generator 2, a third decoder 3, a second memory unit 4, a fourth decoder 5, a controllable frequency divider 6, a block of 7 AND elements, a counter of 8 lines, a first decoder 9, a first block of 10 OR elements, a switch 11, a second block of 12 OR elements, clock generator 13, frequency divider 14, shift register 15, television receiver 16, second decoder 17, first element 18, subtracting counter 19, fifth decoder 20, second element 21.

The device operates as follows.

In block 1 of the memory sequentially recorded text information is stored. A code character code and a character size code, measured in the number of television lines (TVS) of a character scan, are recorded at each address. The code at the end of the group of character codes for each line of text contains the command code for the vertical shift of the line of text and the code for the amount of vertical shift at the beginning of the next line of text, also measured in the number of fuel assemblies. On the screen of the television receiver 16, lines of text are reproduced. The fuel assemblies are numbered within each line of text up from 0 to K _wax - 1, which corresponds to a code change in the counter of 8 lines, representing 5

And 18. Then in the moblock 1 memory and the magnitude of the vertical output of the decoderΊ ''. In itself, a subtracting counter, from to θ when scanning a television raster from top to bottom, the value of the vertical offset of the beginning of the displayed line of text). Before starting to play each new line of text when unfolding a zero fuel assembly of the previous line of text, the counter, 8 lines is in the state `` O ''. At the output of the decoder 17, a signal 'Ί' appears, which is fed to one input of the element 'polling cell containing a command of cal displacement, torus 3 there is a signal' as a result of the output of element And 18 there is a signal '' 1 ' ¹ , which allows recording the code of the displacement value from block 1 of the memory through the block of elements AND 7 to the counter 8 lines. On the counter 8 lines come line clock from the generator 13 clock pulses. From the outputs of the counter of 8 lines, the code enters the decoder 9, at the outputs of which the FA signals from K _max -1 to 0 are sequentially excited.

When playing a line of text with signs of minimal size, the fuel assembly signals from the output of the decoder 9 pass through the block of elements OR 10, the switch 11 and the block of elements OR 12 'to the character generator 2, performing a survey on the rows of the matrix of the sign .. In accordance with the selected matrix line and the sign code coming from the memory unit 1, from the character generator 2 to the shift register 15, an elementwise decomposition of the sign on a certain line is output in parallel. The clock input of the shift register 15 from the frequency divider 14 receives the frequency signals of the shift corresponding to the frequency of the elementwise decomposition of the sign faces horizontally.

From the output of the shift register 15, the video signal is sent to a television receiver 16. The widths of typographic signs (sign fields) take discrete values with a step e * smaller than the dimensions of the television decomposition element a. You can always choose the parameters for the decomposition of characters in such a way that the ratio of the dimensions of the television element and the step of changing the width will be an integer: p = D / sL, where p = 1,2,3 .... The larger the selected p value, the worse the quality of the characters is reproduced, however, a larger number of characters can be placed on the screen of the television receiver 16.

The formation of characters of different widths for p = 3 occurs according to FIG. 2, where 2a is the time diagram of pulses at the output of the controlled frequency divider, 26 is the pulse diagram at the output of the frequency divider 14, and 2c is the pulse diagram at the output of the decoder 20. The width of the signs is expressed in the number of elements of width <L in the horizontal sizes of the sign fields. Binary character width codes are stored in memory unit 4. At the beginning of the sweep of the character string, the character code entering the character generator 2 also arrives in the memory unit 4, from where the width code is read and written to the subtracting counter 19, which was previously dressed in the state 'Ό' ¹ . At the same time, at the output of the decoder 20, which has an inverting output, the signal '* 0 *' disappears and the signal '' 1 ¹ 'appears, which is fed to element * 21 and allows the passage of pulses from the output of the controlled divider 6. of the frequency to the subtracting counter 19 . With the arrival of each pulse, the code in the counter 19 decreases by one. When the code becomes equal to zero, the signal `` O '' will appear at the output of the decoder 20, which will stop the flow of pulses through the And 21 element to the counter 19.

I The same signal, entering the input of the initial setting of the frequency divider 14, resets it to its original state. In addition, the signal ' ¹ 0' ¹ from the output of the decoder 20 is fed to the polling input of the memory unit 1 by signs and proceeds to read the code of the next character. In this case, the width code of this ^ sign is entered from the memory unit 4 into the subtracting counter 19, and the operation cycle of the device is repeated. Divisor ¹ frequency divider 14 has a division coefficient equal to p and serves to generate shear frequency signals arriving at shift register 15. Thus, the formation of character images is carried out from elements of a television scan, and the formation of horizontal sizes of character fields is done using character width codes. Change the vertical size; characters produced by repeatedly reading the rows of the matrix of characters. The minimum size of reproducible characters, expressed in the number of fuel assemblies, is equal to the number of rows of the matrix K _m

I Repeated reading of the zero row of the matrix allows you to get the size K _l + 1, zero and first K _m +2, etc. to a size of 2K _M when all rows of the matrix are repeated *

To obtain sizes from 2K _m +1 to ZK ^ the matrix rows are repeated three times, starting from the zero row. A further increase in the size of the signs is similar.

The block of elements OR 10 provides the logical addition of signals adjacent

Fuel assembly. From the output of the block of elements OR 10 to the switch 10, in addition to the signals received by the logical addition of adjacent fuel assemblies, the signals of the fuel assemblies are also received.

'' Character size code comes from b60

Ί the progress of the memory block 1 to the decoder 5, the output signals of which in the switch 11 selects the fuel assembly signals necessary for polling the matrix rows when forming characters of a certain size. In block ^{3 of the} elements OR 12, the signals are combined from the outputs of the switch 11 related to the same matrix rows. Amount of elements. OR is equal to the number of rows of the matrix of Yu characters. The horizontal dimension of the characters is changed by a controlled frequency divider 6, which varies in proportion to the size of the code of the size of the sign.

This is the period of repetition of pulses supplied to element I 21 and frequency divider 14.

Thus, the field of application of the device has been expanded due to the formation of wide-spread signs, and the 20th step of changing the widths of the anacopoles of characters can be any integer number of times less than the sharpness of the decomposition of the image on the screen of a television receiver. 71-

Claims (2)

To the counting input of the row counter and to the serially connected controlled frequency divider, shift register and television receiver, the frequency divider, the input connected to the output of the controlled frequency range, and the input to the interrogation input of the memory block by signs, the decoder O The inputs of which are connected to the outputs of the row counter, and the output is connected to one input of the AND circuit, the other input of which is connected to the output of the decoder for the row offset command, and the output of the AND circuit is connected to the control input of the AND circuit block and the polling input the memory block in rows, the outputs of the size decoder are connected to the control inputs of the switch, the outputs of the character generator are connected to the inputs of the shift register. The device allows you to simultaneously change the height and width of the displayed characters (sign fields) by the character size code. The change in the horizontal size is made by changing the division ratio of the controlled frequency divider, generating shift pulses for the shift register 2. . However, the known device allows reproducing characters of only one width for each selected size, therefore it cannot be used for a scale display, for example, for typographical text, as characters of a typographic font are known to have different widths at one height. The purpose of the invention is to expand the field of application of the device due to the formation of characters of different widths. This goal is achieved in that a device containing successively connected first memory block, character generator, shift register connected to a television receiver, serially connected line counter, first decoder, the first block of OR elements, the switchboard and the second block of OR elements, the outputs of which are connected to other inputs of the character generator, the second decoder, the inputs of which are connected to the inputs of the first the encoder and the outputs of the counting lines, one inputs of which are connected to the corresponding outputs of the AND block, one input of which is connected to the corresponding outputs of the first memory block, another input of the AND block of terminals and about the input of the first memory block and in the course of the first element I, one input of which is connected to the output of the second decoder, and the other input - to the output of the third decoder, whose inputs are connected to the corresponding outputs of the first memory block, the fourth decoder, whose outputs are connected to other inputs the switch, and the inputs are connected to the corresponding other outputs of the first memory block and one of the inputs of the controlled de-. A frequency generator, a clock generator connected to another input of a row counter and another input of a controlled frequency divider, the output of which is connected to one of the inputs of a frequency divider, are entered into a second memory block, a subtracting counter, a fifth decryptor and a second And element, one input of which connected to the output of a controlled frequency divider, another input connected to the output of the fifth decoder, another input of the first memory block and another input of the frequency divider, the output of the second element AND connected. One input of the E-counter, the other inputs of which are connected to the corresponding outputs of the second memory block, the inputs of which are connected to the corresponding outputs of the first memory block, inputs of the character generator and the input of the third decoder, the outputs of the detracting counter are connected to the corresponding inputs of the fifth decoder. FIG. 1 shows a block diagram of the proposed device; in fig. 2 - reproducing the signs of m and m, taken as an example, and time diagrams of pulses at. . The device contains the first memory block 1, character generator 2, the third decoder 3, the second memory block 4, the fourth decoder 5, a controlled frequency divider 6, the block of 7 elements And, the counter of 8 lines, the first decoder 9, the first block of 10 elements OR, the switch And, the second block 12 elements OR, the generator 13 clock pulses, the divider frequency 14, the shift register 15, the television receiver 16, the second decoder 17, the first element And 18, subtractive counter 19, the fifth decoder 20, the second element And 21. The device works as follows in a way. In memory block 1, text information is stored sequentially. At each address, a code of the sign of the text and a code of the size of the mark, measured in the number of television lines (TVS) of the mark sweep, are recorded. The address at the end of the character code group of each text line contains the command code for the vertical displacement of a text line and the code for the vertical displacement of the beginning of the next text line, also measured in the number of FAs. On the screen of the television receiver 16 lines of text are reproduced. TVS numbering is performed within each line of text up from 0 to. If what corresponds to the change of the code in the 8 line counter, which is a subtracting counter, from rm to D ° O when the television raster is scanned from top to bottom (the value of the vertical offset of the beginning of the displayed text line). Before reproducing each new line of text when scanning the zero FAA. The text of the previous line is 8 lines in the O. At the output of the decoder 17 appears, which is fed to the signal one input of the element 18. And then at the time of polling the cell block 1 A memory signal appears at the output of the decoder 3, the memory containing the command and the value of the vertical offset. As a result, the output of the AND 18 element appears to be a signal allowing the offset value code to be written from memory block 1 through the block of AND 7 elements counter 8 lines. On the counter 8, the arrival of the lower case sync pulses from the generator 13 synchronizing pulses. From the 8-line counter outputs, the code goes to a decoder 9, on the inputs of which TVS signals from To O are sequentially excited. When playing a line of text with signs of the minimum size, the TVS signals from the output of the decoder 9 LH9DYAT through the block of elements OR 10, switch 11 and the block of elements OR 1 to character generator 2, conducted a survey on cTpoKciM matrix of the character .. In accordance with the selected matrix row and the character code received from memory block 1, from character generator 2 to the shift register 15, element-wise decomposition of characters ka on a specific line. So the input of the shift register 15 with the frequency divider 14 receives signals of the shift frequency corresponding to the element-by-element decomposition frequency of the characters in the horizontal direction. From the output of the shift register 15, the video signal is fed to the television receiver 16. The widths of typographic marks (sign fields) take on discrete values in steps smaller than the dimensions of the iHoro TV element decomposition of a. It is always possible to choose the parameters of the decomposition of characters in such a way that the ratio of the size of the television element and the step of changing the width will be an integer: p L / c L, where p is 1,2,3 .... The greater the selected value of p, the worse the reproduction quality The TC of the characters, however, a greater number of characters can be placed on the screen of the television receiver 16. The formation of characters of different widths takes place according to FIG. 2, where 2a is the time diagram of the pulses at the output of the controlled frequency divider, 26 is the pulse diagram at the output of the frequency divider 14, and 2c is the difference between the pulses at the output of the decoder 20. The width of the signs in the number of elements with width in the horizontal dimensions of the sign fields. Binary character width codes are stored in memory block 4. At the beginning of a character string scan, the character code supplied to character generator 2 simultaneously arrives in memory block 4, from which the width code is read and written to subtractive counter 19, which was previously at the output of the decoder 20 having an inverting output The signal O disappears and appears, which is fed to the element. AND 21 and permits the passage of pulses from the output of the controlled frequency divider 6 to the subtractive counter 19. With the arrival of each pulse, the code in the counter 19 decreases by one. When the code becomes equal to zero, the output of the decoder 20 turns on the signal O, which will stop the flow of pulses through the element 21 to the counter 19 This same signal, when it enters the initial installation of frequency divider 14, resets it to the initial state. In addition, the signal O from the output of the decoder 20 is fed to the polling input of the memory block 1 by signs and proceeds to reading the code of the next character. By this, the width code of this character is stored from memory block 4 into subtractive counter 19, and the device operation cycle is repeated. Frequency divider 14 has a division factor equal to p and serves to generate shift frequency signals arriving at the shift register 15. Thus, the image of the characters is formed from the television sweep elements, and the horizontal dimensions of the sign fields are generated by the character width codes. Changing the vertical size of characters is done by repeatedly reading the rows of the character matrix. The minimum size of reproducible characters, expressed in the number of FAs, is equal to the number of rows of the matrix K „. Repeated reading of the zero row of the matrix allows to get the size of K, + 1, zero and the first Km + 2, etc. up to the size of 2Km / when all rows of the matrix are repeated. To obtain sizes from 2K, + 1 to 3Kji, the rows of the matrix are repeated three times, starting with the zero row. A further increase in the size of the signs is anoshogichno. The block of elements OR 10 provides the ohmic sum of the signals of adjacent fuel assemblies. From the output of the block of elements OR 10 to the switch 10, in addition to the signals, instructed by the logical addition of adjacent fuel assemblies, signals are also received from the fuel assembly. One sign size comes from the output of memory block 1 to the decoder 5, the output signals of which in switch 11 select the TVS signals necessary to interrogate the rows of the matrix when generating characters of a certain size. In the block of elements OR 12, signals are combined from the outputs of the switch 11 related to the same rows of the matrix. The number of elements OR is equal to the Number of rows of the matrix of characters. The change in the horizontal dimensions of the signs is made by the control of the frequency divider b, which varies in proportion to the size of the character size code the period of the pulses applied to the element 21 and the frequency divider 14. Thus, the area of application of the device is extended by forming different width characters, and the step of changing the widths of the character fields of the characters can be any integer number of times less than the clarity of the decomposition of the image on the screen of the television receiver, the claims, the device for displaying information. on the screen of a television receiver containing sequentially connected first memory block, character generator, shift register connected to a television receiver, sequentially connected row counter, first decoder, first block of WL elements, switch and second block of OR elements, whose outputs connected to other inputs of the character generator second decoder, the inputs of which are connected to the inputs of the first decoder and the outputs of the row counter, one of the inputs of which are connected to the corresponding outputs of the block of elements And one and the inputs of which are connected to the COOT corresponding outputs of the first memory block, the other input of the AND element block is connected to one input of the first memory block and the output of the first And element, one input of which is connected to the output of the second decoder, and the other input to the output of the third decrypt -tora, whose inputs are connected to the corresponding outputs of the first memory block, the fourth decoder whose outputs are connected to other inputs of the switch, and the inputs are connected to the corresponding other outputs of the first memory block and one control inputs A synchro pulses oscillator connected to another input of a row counter and another controlled frequency divider input, the output of which is connected to one of the inputs of a frequency divider, characterized in that, in order to expand the field of application of the device due to the formation of characters of different widths, it contains the second memory block, the subtracting counter, the fifth decoder and the second element I, one input of which is connected to the output of the controlled frequency divider, the other input connected to the output of the fifth decoder, the other Odom first block memory and the other input of the frequency divider, the output of the second AND element is connected to one input You are a. a reading counter, the other inputs of which are connected by the corresponding outputs of the second memory block, the inputs of which are connected to the corresponding outputs of the first memory block, the inputs of the character generator and the third inputs; its decoder, the outputs of the detracting counter are connected to the corresponding inputs of the fifth decoder. I Sources of information taken into account during the examination 1. USSR author's certificate No. 547798, cl. G 09 G 1/16, 1975. 2.-USSR author's certificate in application number 2857606 / 18-24, cl. G 09 G 1/16, 1979 (prototype). Wttftiiffii 9nopol / g I L .-, i - J „J iiiitniniiiiiiniiiiiiiiinin l II II II II II .1