SU1494778A1 - Apparatus for displaying data on tv receiver screen - Google Patents

Abstract

The invention relates to automation and computing and can be used to display one-time processes. The purpose of the invention - improving the accuracy of the device - is achieved by introducing the first

Description

(L

with

four

00

dzie. i.

the 1h frequency divider, the first counter 15, the second comparison unit 16, the second counter 17, the first driver 19 pulses 19, the third counter 20, the inverter 21, the second frequency divider 24, the fourth counter 25, the third comparison block 26, the fifth counter 27, pulse distributor 28, switch 30, fourth

The invention relates to a) automation and computing and can be used to display one-time processes.

The purpose of the invention is to improve the accuracy of the device.

Figure 1 shows the structure of the device; figure 2 - block diagram of the recording unit.

The device has information input 1, synchronization input 2, control input (bus) 3 of the device and holds an analog-to-digital converter (ADC) 4, recording block 5, memory block 6, register /, AND block 8, and analog converter 9 , video signal generator 10, television receiver 11, synchronization generator 12, first comparison block 13, first frequency divider 14, first counter 15, second comparison block 16 second counter 17, first 18 And, first pulse shaper 19, third counter 20, the inverter 21, the second element And 22, the trigger 23, the second th frequency divider 2A, quarter counter 25, third block 26 comparing fifth counter 27, pulse distributor 28, third element 29, switch 30, fourth element 31, clock generator 32, second pulse generator 33, five And 34 .

The recording unit contains a one-shot 35, the switch 36, the element And 37.

The device works as follows.

In the initial state, before starting to record information, immediately upon power up, the shaper 19 generates a single pulse, which is fed to the control inputs of the presetting of the counters 15, 20, 25. This pulse is carried out

the element And 31, the second pulse shaper 33, the fifth element And 34 and the corresponding functional connections. The invention makes it possible to display a non-standard format television frame in the center of the screen of the television receiver and thereby reduce coordinate distortions. 2 Il.

t5

20

25

thirty

35

40

45

50

55

Record the codes displayed on the information inputs of these counters. On the 1 inputs of the counter 15, a code corresponding to half the number of rows in the frame of the television receiver is displayed, on the information inputs of the counter 25 is a code corresponding to half of the expansion elements on the row of the television receiver, on the information inputs of the counter 20, the code corresponding to the number of non-standard television string with which An analysis of the format of the string is performed. The television sensor, which generates information signals for a display device, operates in a pulsed mode. Therefore, the possibility of synchronization of the tele sensor and the instability of the duration of some lines at the beginning of the formation of a non-standard frame is not excluded. Therefore, the analysis of the format of the line must begin with some delay relative to the beginning of a non-standard frame. This is provided by a counter 20 operating in subtraction mode. Under non-standard understand the frame with the number of lines and elements in the line is less than that of the used television receiver.

The device operates in two modes: the first is the mode of recording information; the second is the display mode of the recorded information. The mode of operation of the device is selected via control bus 3. If control bus 3 receives a level of Log. O, the device operates in the recording mode, if Log 1 is in display mode.

Before starting the display, the device is set to the recording mode of the feed to the control bus 3 level V Log.O; from the television sensor during single light registration

process of information entry

1 comes the luminance signal, and the input

2 sync pulse sync pulse received. The recording unit 5 controls the encoding and recording of the luminance signal.

During the course of the television line, the recording unit 5 permits the arrival of pulses from the generator output of 32 clocks to the clock input A Tin 4. With the frequency of these pulses, the A / D converter 4 converts the arrow-out signal to its information input into a code. At the output of the A / D converter 4, a digital code and a control pulse are generated, which, through a recording unit, are fed to the input of memory unit 6. Using the pulses generated by the A / D converter 4, information is recorded in the memory block b. During the return stroke of the television line, the recording unit 5 prohibits the encoding and recording process of the luminance signal of this non-standard line, and the information outputs of the recording unit 5 instead of the luminance signal codes exhibit the line separator code generated by the recording unit 5. The recording unit 5 also generates a single pulse, by which the code of the separator is written into the subsequent cell of the storage unit 6. Further, on the positive edge of the next pulse of the clock, the process of encoding and recording the luminance signal and the separator code is resumed. The device uses a sequential access memory block. As a result of the recording in memory block 6, the entire information array of the quantized luminance signal is divided into information blocks corresponding to the rows of the telecounter operating in conjunction with this device. After the end of the formation of the television frame by the sensor, the luminance signal and the sync pulses to the corresponding inputs of the device are stopped, and the recording unit 5 stops recording information in the memory block f.

When a logical unit arrives at the control bus 3, the device switches to the display mode. The distributor 28 pulses from the sequence of frame sync pulses fed to its input from the second output of the synchronous generator 12, selects the nearest single frame sync0

five

0

five

0

five

0

five

0

five

the impulse that goes to the control input of the switch 30, controls the 1 input of the divider 14, the reset input of the counter 20 and permits the arrival of pulses from the generator 32 clock pulses, through the switch 30 to the read control input of the memory block 6, and also allows the divider to work frequency 14, the operation of the counter 20 in subtraction mode. During the first frame after transferring the device to the display mode, the entire memory block 6 is continuously polled by applying pulses to the read control input, the shape of the non-standard frame does not occur on the screen, and the preparatory operations are performed as follows. In the display mode, the frame sync pulses are allowed through the AND 18 element to the input of the second imaging unit 33 pulses. During the reverse motion of a television frame, pulses arrive at the output of the second pulse generator 33 to the memory input of the memory block, which zero the address register of the block of bits in each frame to begin reading from the zero cell of the memory block. When reading on the output line of the memory block 6, information digital codes are set, and on one of the buses there is a control signal by which information can be copied to register 7, which is intended for intermediate storage. At the same time, the information codes are fed to the first group of inputs of the comparison unit 13, to the second group of inputs of which from the recording unit 5 always receives the separator code. In case of equality of the codes, pulses of logical 1 st will appear at the output of the first comparison unit 13. The pulses from the output of the comparison unit 13 through the first frequency divider 14 are fed to the counting input of the counter 15, which operates in the subtraction mode. As a result, at the output of the first counter 15, by the end of the first frame, the line number of the frame of the television receiver with which the display of information is permitted.

The pulses from the output of the comparison unit 13 are also fed to the synchronization input of the counter 20, which operates in the subtraction mode. With the zeroing of the second counter 20 as a result of the subtraction, a logical unit appears at the output of the inverter 21, which, through the AND 34 element, removes the prohibition from the control input of the second frequency divider 24. The sync input of counter 25 through a frequency divider 24 receives pulses from a generator of 32 clock pulses. At the end of a non-standard line specified for anapis, counter 20 on the outputs of counter 25 is the number of the line decomposition element from which information is allowed to display. At the end of the first frame, a logical zero appears at the output of the synchronization block, the work of the dividers h is blocked; 14 and 24, the counter 20, and the switch 30 switches to pass pulses from the output of the AND element 22 to the read control input of the memory block 6. The register a / address of memory block 6 is set to the zero state by a pulse arriving with. the output of the pulse former 33. From the second frame sync pulse, after switching the device to the display mode, the actual process of displaying the information on the screen of the television receiver I 1 begins,

The synchronous generator 12 generates personnel 1 horizontal sync pulses of standard duration, From the first output of the sync generator 12 to the counting input 1 is a counting switch 17, which operates in the summation mode, the horizontal sync pulses arrive in the forward motion of the television frame.

When the value-code at the output of the counter 17 becomes greater than the code value at the output of the counter 15 (received earlier), the logical unit appears at the output of the second comparison unit 16, which is fed to the first input of the element 31, the counting cycle of the fourth counter 17 each frame is repeated, since frame sync pulses are input to the reset input of counter 17. This input of the counter 27, operating in pemiiMO dive, receives impulses from the output of the generator 32, Counter 27 operates in the counting mode only during the forward run of the television line, because 12 spacing pulses of the synchro-generator arrive at its reset input. Nickle accounts are repeated every

0

five

0

five

0

five

string. If the code value and the output of the counter 27 exceeds the code value at the output of the counter 25, the logical unit will appear at the output of the comparison block 26, which is fed to the second input of the And 31 element If there are 31 logical units at both inputs of the output, logical unit. When a pulse arrives from the output of the element 31 on the clock circuit, the input of the trigger 23 is set to one and the pulses from the output of the clock generator 32, through the element H 22 and: the switch 30 to the read control input of the memory block 6 are allowed. - ciiM information codes are set at the output of memory block 6 and pulses are written to write code dd from the current cell of memory block 6 to register 7, which is intended for intermediate storage of information. Next, the code goes through block OK elements I 8 and DAC 9 to the video input of the video signal imaging device 10, to the synchronization input of which 12 frame and horizontal sync pulses are received from the synchronizer output. The driver O summates / em these signals and at its output forms a complete television video signal displayed by the television receiver. The block of elements And 8 reduces the likelihood of synchronization of television reception 0

five

0

five

Simultaneously with the conversion of a digital signal into a hollow video signal, the codes read from memory block 6 are analyzed. Code analysis is carried out by comparison unit 13. When a separator code comparison unit 13 appears on the first group of inputs, a pulse (logical zero) appears at the output, which triggers the trigger 23 to the zero through the AND 29 element and prohibits the pulse from the generator output to pass 32 clocks through the K 22 element and the switch 30 to the control input of the memory block 6. In addition, the output of the trigger 23 of the Log. O is applied to the register zero reset input 7. After reading the separator code from the memory block, which corresponds to the end of the non-standard TV line, the flow of the analog signal 9 stops

Luminosity at the input of the video signal conditioner 10. With the beginning of the forward run of the next TV line, the prohibition signal is removed from the reset input of the counter 27 and it goes into the counting mode.

Thus, the device ensures the formation of a nonstandard luminance signal not from the beginning of the frame of the television receiver, but from a certain point in time ensuring the alignment of the centers of the non-standard frame and the screen of the television receiver. Due to this, the accuracy of the display is increased, since coordinate distortions and information losses due to deterioration of the resolution to the periphery of the television screen constitute

a few tens of percent

Claims (1)

re - a few percent. Formula images in the center of A device for displaying information on a television receiver screen containing an analog-to-digital converter, a recording unit, a memory unit, a register, an AND unit, a digital-to-analogue converter, a video signal maker, a first comparison unit, a trigger, a sync generator, first to third elements And, the clock generator, the output of which is connected to the first input of the second element And and the clock input of the recording unit, the output of which is connected to the clock input of the analog-to-digital converter, the outputs of which are Connected to the information inputs of the recording unit, the outputs of the first group of which are connected to the information inputs of the memory unit, the outputs of which are connected to the information inputs of the register and the input of the first group the first comparison unit, the inputs of the second group of which are connected to the outputs of the second group of the recording unit, the sync input of which is the device synchronization input, the information input of the analog-digital converter is the information input of the device, the register outputs are connected to the inputs of the first group of elements AND whose outputs are connected to information inputs of the digital-analog converter, the output of which is connected to the information input of the video signal forms, the output of which is connected to the video input, 1 o 0 five 0 5 Q five 0 five 0 five TV house comp.ch, sync generator output podkli chei i inputs vts-roG; g ruppa block. Plsms nt I and synchronous input of the foregpc video signal, BTOpoii output of the synchro-generator is connected to the first input of the first I element, BTopoi i whose output, connecting the red inputs to the third element I, is the control input of the third element element H is connected to the reset input of the trigger, the input of which is connected to the second output of the second element: And and the control input of the register, the information input of the trigger is input Log, 1 device, characterized in that, in order to improve the accuracy of the arrangement, it contains the first w} i the second frequency dividers, the first through five counters, the second and third comparison blocks, the pulse distributor, the first and second pulse formers, the fourth and fifth elements AND, the inverter, the switch, the first information input of which is connected to the output of the clock generator connected to the clock number 1 by the inputs of the second frequency divider and the fifth counter, the output of the second element H is connected to the second information input of the switch, the output of which is connected to the read control input of the memory unit, the reset input of which connected to the output of the second forshrovatel pulses, whose input is connected to the output of the first AND gate, a first output coupled to the pulse shaper the control inputs of the first, third and fourth counters, the output of the first comparison unit is connected to the clock input of the first frequency divider, the second input of the third element AND, the first input of the first element AND the clock input of the third counter, the information inputs of which are The inputs of the first group of the device, the output of the third counter is connected to the input of the inverter, the output of which is connected to the second input of the fifth element I, the output of which is connected to the control input of the second frequency divider, the output of which It is connected to the clock input of the fourth counter, the information inputs of which are the control inputs of the second group of the device, the outputs of the fourth counter are connected to the inputs of the first group of the third comparison unit, the inputs of the second group of which are connected to the outputs of the fifth counter, and the reset input it is connected to the first output of the synchronous generator, which is connected to the clock input of the second counter, the reset input of which is connected to the second output of the synchronous oscillator, connected to the information input of the pulse distributor the output of which is connected to the control input of the switch, the reset input of the third counter and the control input of the second frequency divider whose output is connected to the clock input of the first the counter whose information inputs are the control inputs of the third group of the device, the outputs of the first counter are connected to the inputs of the first group of the second comparison unit, the inputs of the second group of which are connected to the outputs of the second counter, the output of the second comparison unit is connected to the first input of the fourth element AND , the second input of which is connected to the output of the third comparison unit, the output of the fourth element I is connected to the trigger input of the trigger, the control input of the pulse distributor is connected to the control input of the device -keeping. Fig 2