SU1073793A2 - Device for generating symbols on television receiver screen - Google Patents

Abstract

DEVICE FOR THE FORMATION OF SIGNS ON THE SCREEN OF THE TELEVISION RECEIVER on aut.St. 744667, characterized in that, in order to expand the field of application of the device by forming oblique signs and signs that periodically change the slope, a delay unit, a multiplexer, a video switch, a second AND element, an AND-NOT element, a trigger and a frequency divider are introduced into it, the output of which is connected to the first input of the NAND element, the second input of which is connected to the output of the trigger, the input of which is connected to the output of the decoder of the character code, the output of the AND AND element is connected to the first input of the second element AND, the second input of which to the output of the memory unit, the output of the second element I is connected to the first input of the video switch, the output of which is connected to the input of the modulator of the television receiver, the second input of the video switch is connected to the output of the register connected to the input of the delay unit whose output is connected to the first input of the multiplexer, the second input which is connected to the output of the row counter, the output of the multiplexer is connected; to the third input of the video switch. 00 with SAE

Description

The invention relates to automation and computer technology and is intended for use in information display devices operating according to the method of generated line and interlace television small format rasters. According to the main author, no. 744667, a device is known for generating characters on a television receiver screen, comprising a serially connected memory block, a character code decoder, and a character generator connected to a line code decoder connected to a line counter, a clock generator connected to a register, as well as the And element connected to the memory block and the line code decoder, and the sequentially connected backlight pulse generator connected to the character generator and the memory block, the switch connected to the sign-generator RAT and a memory block and an OR element block connected to the illumination pulse shaper, AND element and register. The known device ensures that the indicator with raster decomposition of the lines forms sign-character information with the selection of characters when editing with a marker (on a white background of a rectangle). dark sign) and drawing vertical and horizontal lines when displaying graphical forms of table forms, situation assessment trees, histograms. A disadvantage of the known device is the inability to extract the most important information from the array of displayed data on the screen of a television receiver, which leads to operator fatigue. The purpose of the invention is to expand the field of application of the device by forming inclination signs and signs that periodically change the inclination. . The goal is achieved by the introduction of a delay unit, a multiplexer, a video switch, a second AND element, an OR-NOT element, a trigger and a frequency divider whose output is connected to the first input of the AND-HB element, the second input of which is connected to the output of the trigger, the input of which is connected to the output of the decoder of the character code, the output of the EE element is connected to the first input of the second element I, the second input of which is connected to the output of the memory block, the output of the second element I connected to the first input of the video switch whose output is n to the modulator input of the television receiver, the second input of the video switch is connected to the register output connected to the input of the delay unit whose output is connected to the first input of the multiplexer, the second input of which is connected to the third input of the video switch. Figure 1 shows the structure. 2 a and b are timing diagrams of the formation of a direct and an inclined sign and the form of representation of the displayed characters; FIG. 3 are embodiments of atypical units of the device. The device contains a memory block 1, a decoder 2 character codes, character generator 3, 4 lines counter, 5 code lines decoder, a backlight pulse former, switch 7, a block of 8 elements OR, first element 9И, register 10, 11 clock generator, television receiver 12, delay unit 13, multiplexer 14, switch 15, second element 16 AND, element 17 AND-NOT, trigger 18, frequency divider 19, memory block input 20, row counter input 21, register write resolution input 22 and divider input 23 frequencies. The trigger 18 serves to form a time interval during which it is necessary to select one or a group of oblique signs with a periodically varying slope. The formation of such an interval (at the single output of flip-flop 18) is as follows: since a single character or group of characters is separated from other characters by a space, the binary code of the beginning (end) of the character (s) with periodically changing slope is written into the numerical lines of the block . 1 memory in place of the space code so that the beginning code precedes, and the end code follows the numeric ruler of the sign (s) to be allocated. When polling the numeric lines of memory block 1, binary codes of the beginning (end) of character selection with periodically varying slope are fed to the input of the decoder 2, where they are converted at different outputs of the decoder into two separate signals of the sign of the beginning (end) of character allocation in the speaker input set and reset Rs-flip-flop 18, respectively. The duration of the formation at a single output of the trigger 18 for the time interval is determined by the follow-up period of the installation and reset of the flip-flop from the outputs of the decoder 2 and depends on the time of forming the highlight of the character string and the number of characters that must be selected periodically changing slope. The device works as follows. Digital data containing information about the code of characters and signs of the selection of characters is recorded in memory block 1 at input 20. In time intervals of the display mode from the output of memory block 1, the parallel character code and character selection code with a periodic slope change, as well as signs of the marker , horizontal and vertical lines and the selection of characters in oblique type in statics come respectively: the code of characters and the selection of characters with a periodic change of the slope to the input of the decoder 2 codes and from the output of its decoded values of the code The signs start (end) the selection of characters with a periodic change in the slope at the input of the trigger 18, the data of the signs of the marker, vertical and horizontal lines, and the inclined font, respectively, at the control input of the switch 7, at the input of the driver 6 for the pulses the illumination to the input of element 9 I and the control input of the video switch 15. At the same time, from the output of the 4-line counter controlled by the input 21 by counting pulses of horizontal or multiple of its frequency, the code of the lines goes to the input of the multiplexer 14, and Cutting the decoder 5 lines of code to the second inputs of the character generator 3 and element 9 And signals of the interpretable string are received. Under the influence of simultaneously dimming signals, the character generator 3, formed on the basis of a constant memory device in which the positional program of the illuminations of the given alphabet of characters is stored, generates : in the form of the correspondence to the character string to be drawn, impulse code combinations of words of the illumination, coming directly and through the driver of the 6 pulses of the illumination to two inputs and the switch 7. The pulse generator 6 illuminator configured to Elem; s not, the outputs provides an inversion of the input signals. Therefore, at the inputs of the switch 7 simultaneously. but-present pulse code combinations of the words illumination in direct and inverted form. Selective sampling of incoming illumination words is carried out by the presence or absence of a marker feature at the control input of switch 7. If there is a marker feature, the input of block 8 elements OR is inverted to the code combination of the illumination words from the output of the imaging unit 6, in the absence - without inverting from the output of the character generator 3. Here, the second and third inputs of block 8 elements OR receive pulses highlighting the vertical and horizontal lines, respectively; from the second output, the bis output of element 9 I (along confluence on its inputs the signal feature and the horizontal line sig Nala decoder output 5 lines of code, which must be formed the horizontal line). In block 8, the OR elements are carried out in the raster-matrix field of the symbol field spatially-positioned arrangement of the words illuminating the character lines, the vertical line impulses with the horizontal line illuminating pulses before writing them to the register 10 according to the input resolution signal input to input 22 from the external device sync. In register 10, the action of the clock pulses coming from the generator 11 transforms the words of the illumination from a parallel form to a serial one synchronously with a horizontal beam sweep in the television receiver 12. The video signal generated by the output of the register 10 is fed directly through the delay unit 13 and the multiplexer 14 to two inputs of the video switch 15, where, depending on the presence or absence at the first control input of a sign of an inclined font arriving through the second element 16 And from the output of the memory block 1, held or without delay, the signal from the output of the video switch 15 is fed to the input of the television receiver 12 for controlling an electron beam illumination modulator. If there is an oblique font feature at the control input of the video switch 15, the video signal from the output of the multiplexer 14 passes to the input of the modulator of the television receiver 12. The latter transmits the delayed signals from the intermediate signals to the output of the multiplexer 14 by the control signal of the line code. outputs of block 13. delay (fig.Z). Moreover, the first line of the raster matrix character field to the input of the television receiver 12 through the multiplexer 14 and the remote, the mutator 15 passes the video signal of the backlight, which has a maximum delay from the output of the last link of the delay block 13, the second line - delayed. This is the signal from the penultimate link of block 13, delay, the third from the penultimate link, and so on. up to the last line of the raster matrix of the symbol field. On the last line through the multiplexer 14 passes the video signal without delay. As a result of the fact that the video superlight of the character row on the raster-matrix field of the symbol is shifted relative to each other by the same amount (it is determined by the switching time of the two inverters of FIG. 3), the beginning of the mark highlighting on each subsequent raster line goes ahead, due to which the mark is formed font with a slope to the right (figv). If there is no sign of a sloping font on the control input of the video switch 15, the backlight video signals of the characters without delay are passed directly to the input of the modulator of the television receiver 12 directly from the output of the register 10. Signs are formed in the right font (Fig. 26); In order to isolate the generated sign information with a periodically varying slope, the signal of the sign of the beginning of the selection of a separate sign or group of signs from the output of the descrambler 2 is fed to the installation of the trigger 18. At the same time, the positive logic level 1 from the unit output of the trigger 18 enters the input of the element 17 I- NOT by coinciding with the positive low frequency meander (1-5 Hz) generated at the last division of divider 19 when 23 frame signals are applied to its input, generates a signal to prohibit the passage of the element through element 16 and recognizes n and clone the input switcher 15 (Figure 2a). As a result, the marked signs of inclination at this moment are formed by a direct game script. And in periods: the time when the sign of entering signs by dynamic slope at the input of element 17 AND-NOT coincides with the negative period of the meander, at the output of element 17 AND-NOT a positive level is formed, which prevents passage through element 16 AND the sign of oblique font .to the control input of the video switch 15 and to the input of the modulator of the television receiver 12. The marked signs of tilt are received during the negative period of the meander from the output of the multiplexer 14. Signs on the screen of the television receiver 12 for iruyuts naklonN1M font. Because. the process of forming the meander is periodic, then intermittently the prohibition and permission of the passage of the tilt signs to the control input-video switch 15 are carried out, and the signs marked with a sign periodically change from 1 to 5 Hz the slope, i.e. The MELM and the oblique font are formed until the trigger 18 from the output of the decoder 2 does not receive a signal of the end of the moment selection of a periodically varying slope. The incoming signal transfers the trigger 18 to the zero state, and the negative level of the logic O from the single output prevents it from entering the square wave from the frequency divider 19 through the element 17 AND-NOT to the input of the element 16 I. The output of the element 17 AND-NOT is set to positive and signs of character allocation by oblique font from the output of memory block 1 through element 16 And freely pass to the control input of video switch 15 regardless of the phase formed by the low-frequency square cutter 19 and control the switching of video signals from the outputs of reg Page 10 and multiplexer 14 to the input of the modulator of the television receiver 12. Sign thus formed on the screen, the sign information is also displayed in italics in statics.

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Claims (1)

DEVICE FOR FORMING SIGNS ON THE SCREEN OF A TELEVISION RECEIVER by ed. »744667, characterized in that, in order to expand the scope of the device by forming inclined signs and signs periodically changing the slope, a delay unit, a multiplexer, a video switch, a second AND element, an AND-NOT element, a trigger and a divider are introduced into it frequency, the output of which is connected to the first input of the AND-NOT element, the second input of which is connected to the output of the trigger, the input of which is connected to the output of the character code decoder, the output of the AND-NOT element is connected to the first input of the second AND element, the second input of which is connected to an ode of the memory block, the output of the second element And is connected to the first input of the video switch, the output of which is connected to the input of the modulator of the television receiver, the second input of the video switch is connected to the output of the register connected to the input of the delay unit, the output of which is connected to the first input of the multiplexer, the second input of which is connected to counter / line output, multiplexer output connected 'w to the third input of the video switch. R