SU1238092A1 - Information input device - Google Patents

Abstract

The invention relates to the field of automation and computing. The aim of the invention is to increase the speed of the device. The difference of the proposed device, which ensures the achievement of the goal, is that it allows to select on each line of the raster the group of samples recorded in the computer memory in the form of a machine word, and is equipped with a frequency divider, counter (groups) f. comparator shaper. The device can be widely used in image analysis systems, built on the basis of a computer, and sources of standard video signal. 1 hp f-ly, 4 ill. S (LU SAD 00 soy

Description

The invention relates to automatics and computer technology, in particular, to devices for inputting video information into computer memory, and can be used for image processing and analysis in medicine and biology, automation of production, and the earth’s natural resources.

The purpose of the invention is to increase the speed of the device.

FIG. 1 is a block diagram of the proposed information input device; FIG. 2 and 3 are functional diagrams of a control unit and a unit for stopping a generator of clock pulses in FIG. 4, a diagram explaining the operation of the device.

The information input device contains (Fig. 1) analog-digital converter 1, key block 2, 3 pulse generator, frequency divider 4, first counter 5 (groups), Comparison block 6, control block 7, driver 8, second counter 9 (frames ), - comparator 10, register 11. The outputs of the control unit are designated by numbers 12-14. The control unit 7 contains (FIG. 2) a short pulse shaper 15, a trigger

16, AND-NE element 17, trigger 18, electronic pulses following with a ment-AND period 19, shaper 20 short video sampling signals TD.

pulses, the element is NOT 21, the trigger 22, the element is AND 23, the element is NOT 24, is an element

.I 25. The inputs for installing triggers in the single state are denoted by the letters 35 S, and the inputs for installing the triggers in the zero state by the letters R, Shaper 8 contains (FIG. 3) the element OR-NOT 26, the counter 27 (zones), the comparator 18, Inputs of the element OR NOT 26 40

are connected to the outputs of the counter 5, a, OUTPUT of this element - with the input of the counter 27, the input of the zero setting of the counter 27 is connected to the output 13 of block 7

With the help of the divider 4, from the sequence of clock pulses, each L-th pulse is selected, and thus the row counts are divided into groups, each of which contains t, counts. The counter 5, which is a cyclic counter, records the number of the current group. The indications of counter 5 are the numbers 0,1,2 ,,,,,

Comparing the readings of counters 5 and 9 in the comparison block 6 allows you to select one on each line of the raster

management The inputs of the comparator 28 are collected from the group of samples by forming the outputs of the counter 27, the output of the paraparator 28 is connected to the stop input of the generator 3,

The device works as follows.

Starting the device is determined by -. a single impulse. Start, on the leading edge of which the triggers 16, 18, 22 are set to O by differentiating the impulse. Start by the former 15 and passing this signal to the output of the element. And 25, To - the leading edge of the impulse

50

55

of a signal arriving at the control input of the key block 2 and permitting the recording of the luminance values of the samples in the register 11. Recording is enabled by opening the keys that transmit signals from the outputs of the analog-digital converter 1 and the generator 3, on the falling edge of the control signal block 6 is matched, a data readiness signal is generated, which enters the data input channel. The computer, as a result, the information from register 11 is copied to the operative memory of the computer,

The start is set to a single state trigger 16, and with the arrival of a frame sync pulse (XI), the input of the AND-NE element 17 is set to the single state trigger / 18. Consequently, the horizontal sync pulses (SII) are input to the input of the former 20 through element 19. , with the help of

the formation of short pulses is carried out on the front (at the output 13 of the control unit 7 and at the rear (at the output 12 of the control block 7, the fronts

The FID is set to the single state trigger 22 and by its output it allows the passage of the FID to the output 14 of the control unit 7 (through the element 23),

The signals from the output 14 of the control unit 7 change the state of the counter 9, and the frames are numbered 0,1,2 ,,,,, G - 1, where G is the number of sweep frames required to write the raster to the computer memory, the leading edge of the FID is set to O counters 5 and 27, and on the falling edge of the FID, a generator 3 is triggered, at the output of which clocks appear that follow with a video signal sampling period Td.

With the help of the divider 4, from the sequence of clock pulses, each L-th pulse is selected, and thus the row counts are divided into groups, each of which contains t, counts. The counter 5, which is a cyclic counter, records the number of the current group. The indications of counter 5 are the numbers 0,1,2 ,,,,,

Comparing the readings of counters 5 and 9 in the comparison block 6 allows you to select one on each line of the raster

 groups of samples by forming

of a signal arriving at the control input of the key block 2 and allowing recording of the luminance values of the samples in register 11, recording resolution is realized by opening the keys that transmit signals from the outputs of the analog-digital converter 1 and the generator 3, on the falling edge of the control signal in the block 6, the data readiness signal is generated, which enters the data input channel. As a result, the information from register 11 is copied to the computer's RAM,

During operation of the counter 5, in block 8, the zone number is determined (FIG. 4). Element 26 is used to select the beginning of each zone due to the fact that a single signal appears at the output of element 26 in the event that all inputs of counter 5 are zero. Counter 27 counts the zones, and the comparator 28 is triggered when the output 27 at the output of the counter is y + 1. The output signal of the comparator 28 is used to stop the generator 3, which, after a stop signal, waits for the next FID. The device stops working with the arrival of the G-ro XI, when it is received by the comparator 10, a Stop signal is generated, which arrives at the input of the element 25, sets the triggers 16, 18, 22, to zero, for preada, thereby passing XI and SII through block 7 -managing

Claims (2)

1. A device for entering information containing an analog-digital converter, a control unit, a register, a pulse generator, a comparison unit, a first counter, the first input of which is connected to the first output of the control unit, the second input of which and the second input of the first counter are the first input of the device, the first input of the analog-digital converter is the second input of the device, the first input of the pulse generator is connected to the second output of the control unit, the first and the third inputs of which are the third and fourth inputs of the device, respectively odes of the register of ownership 5 10 t5 20 25 all right 35 The outputs of the device group, the first output of the comparison unit is the output of the device, the output of the pulse generator is connected to the second input of the analog-digital converter, the outputs of the first counter are connected to the inputs of the first group of the comparison unit, so as to increase the speed of the device A frequency divider, a key block, a second counter, a driver, a comparator, and the register group inputs are connected to the outputs of the key block group, the inputs of the group of which are connected to the outputs of the analog-to-digital converter. the user, whose second input, the first input of the key block and the frequency divider input are connected to the generator output, the second input of which is connected to the driver output, the input of which and the second input of the second counter are connected to the third output of the control unit, the fourth input of which is connected to the output the comparator, the inputs of which are connected to the outputs of the first counter, the outputs of the second counter are connected to the inputs of the imaging group on the inputs of the second group of the comparator unit, the second output of which is connected to the second input of the key block . . 2. The device according to claim 1, wherein the driver contains an OR-NOT element, a comparator, a counter., The first IBM input of which is connected to the output element. And W-NOT, whose inputs are the group-g inputs shaper generator, the counter outputs are connected to the inputs of the comparator, the output of which is the shaper output, the second input of the meter is the shaper input Table. eight "and Oatthhx Pox Stop. 14 ctfemvu / a 3-G kmemeratory hr five- . ffm SAOKO 7 controls tSGHO And 1zona t Zona 4jews (fZSS.i Y ", eg0" aT Sr "" / 5 "g gg 2 Vnshshi Order 3293/50 Circulation 671 Subscription Pro-polygr. pr-tie, Uzhgorod, st. Project, 4 jjrJS ".r. w.t