SU1585789A1 - Periodic function digit generator - Google Patents

Abstract

The invention relates to computing. The aim of the invention is the expansion of the class of tasks by the possibility of generating periodic test images of different formats and scales. The generator contains counters 1, 3, 4, multipliers 6, 8, 10, generator 2 pulses, adder 7, element OR 5, block 11 of function value memory, delay element 12, register 9, amplitude input 13, correction factor input 14, input 15 of the correction factor recording, reset input 16, start 17 input, input 18 set the number of samples in the image line, input 19 set the number of lines in the image, input 20 scale factor, input 21 write the harmonic number, input 22 harmonic number, information output 23 , output 24 sync pulses, output 25 sync pulses. The goal is achieved by introducing counter 4, the element OR 5. 1 Il.

Description

ate

00 SP

00 QD

The invention relates to computing, is intended to generate periodic test images and can be used to determine the resolution of the video signal transmission and display steps, as well as in video path simulation simulation systems.

The aim of the invention is to expand the JQ-value of the amplitude of brightness, the definition of the class of tasks due to the possibility of generating periodic test images of different scales and formats. .

The drawing shows the functional scheme of the device. First counter 1, generator 2 pulses, second 3 and third 4 counters, element OR 5, first multiplier 6, adder 7, second multiplier 8, register 9, third multiplier 10, function value memory block 11, delay element 12, input 13 amplitudes, input 14 of the correction factor, input 15 records

20

analyzed images S zone between 1 and 1 + 1 harmonies

 The address of block 11 of the form memory is the sum of the addresses, multipliers x 6 and B. At this inhabitant 6, t, Sy is formed, multiplier 8 t, -1 y 2 -K, where the image is. At entry 13 for

14 is the value of S, the input K for input 2, and the input 22 for the value of the multiplier 10 is formed with A (1 + sin q). The value of M is the back of input 18 and sets the count of the counter 3. On the input 19, the value of the number of lines in the image is N, I set the counting count of 4. The counter is 1-2.

The generator works in two

Mode 1 - generation of the ideal image of any ki (for example, 1 0-31, S

correction factor, input -16 reset, 25 M 32, N 32, K 1).

17 start, input 18 set the number of samples in the image line, input 19 set the number of image lines, input 20 scale factor, input 21 to write the harmonic number, input 22 the harmonic number, information output 23, 24 line clock, output 25 clock

 frame.

The device works as follows ..

Let it be necessary to generate an image with a sinusoidal distribution of luminance along the lines of this image. In this case, the value of the brightness of the i-ro count in the line

 2fr

A (H-sin l-tj),

thirty

35

40

V -

mk

the number of samples in the line of the output image, with p 0-p; harmonic number; luminance amplitude of the output image; scale factor. 11 memory recorded value + sin (.f for the period. The volume of the memory block is 2 x 2 where 2 is the number of periods of the function per image line (for a sinusoidal function the number of harmonics; 2 is the number of coefficients of the correction (for a sinusoidal function the number

where t; M 2P

one -

A k b block

function 1

45

50

55

The signal of the initial mustache at the output of the counter 3 - all of the counter 4 - are zero. After this input 16, a zero signal is applied, and while holding counter 1 in the zero state, input 21 receives a signal for decisively recording the garm number. register 9. The signal on the input generator starts working 2 ow and increases the value by one (11111 + 1 00000). In the new output, the signal of the overflow 3 is fed to the first 4, increasing its value by one (00000 + 1 00001), and on the 12th delay element, $ 24 is the sync pulse of the image line. On y 8 - O. At the output of this mode, the zero information of the output of the adder 7 - O, t of the block 11 of the information memory 1 with the zero address and the A value on the multiplier 10 is cleared to the output 23 of the device.

When the next one arrives at the first input of the counter, it switches to the MF position, i.e. 00001. At the output, multiply 8 (t; 1, lj 1,; information from block 11 is memorized from the 8th address and so on 24248 (8x31).

luminance amplitude value

0

analyzed images S in the range between 1 and 1 + 1 harmonics).

 The address of memory block 11 is formed from the sum of addresses formed on multiplier 6 and B. At the same time, t, Sy is formed on multiplier 6, 8 t on the second multiplier, -1 at 2-K, where j is the image number. At input 13 is set

at the entrance

14 is the value of S, input 20 is the value of K, input 22 is the value of 1, the value of A (1 + sin q) is formed at the multiplier 10. The value M is set at input 18 and sets the counting boundary of counter 3. Input 19 sets the value of the number of rows of the output image N, which sets the counting boundary of counter 4. The counter size is 1-2.

The generator works in two modes.

Mode 1 - generating sinusog ...: the ideal image of any harmonic (for example, 1 0-31, S 0-7,

0

five

0

five

0

55

The signal of the initial installation at the output of the counter 3 - all units, the counter 4 - zeros. Thereafter, a zero potential is applied to the input 16, setting and holding the counter 1 in the zero state. Input 21 receives a recording signal, allowing the recording of the harmonic number in the register 9. The signal at input 17 starts the generator of 2 pulses and increases the value of counter 3 by one (11111 + 1 00000). On the first output, the overflow signal of the counter 3 is fed to the first input of the counter 4, increasing its value by one (00000 + 1 00001), and delayed by the delay element 12 - the output of $ 24 is the sync pulse of the beginning of the image line. On the multiplier 8 - O. At the output of the multiplier 6 in. This mode is null information. At the output of the adder 7 - O, i.e. from block 11 of the memory, information1 is read- at the zero address and multiplied by the value A on the multiplier 10 enters the output 23 of the device.

When the next pulse arrives at the first input of the counter 3, it switches to the MF 3 + 1 position, i.e. 00001. At the output of the multiplier 8 - 8 (t; 1, lj 1,, K 1), i.e. information from memory block 11 is read from the 8th address, and so on: 16, 24248 (8x31).

51585789

When 2 pulses arrive at the first input of counter 3, it switches to position 00000 and generates an overflow signal on the first output, which increases the value of counter 4 by one (00000 + 1 00001), and output 24, delayed in delay element 12, synchronizes the start next line. After forming the Nth row of the image, i.e. after the arrival () of the pulse, the counter 4 is zeroed, giving out on the output 25 the sync signal of the end of the image frame and arriving at the first input of the element OR 5, permits writing to the register 9 of the new value 1. When the second harmonic arrives at the input 22, the output 23 periods

ten

15

If it is necessary to generate another periodic image, the corresponding function is recorded in memory block 11.

Claims (1)

Invention Formula A digital periodic function generator containing a pulse generator, two counters, an adder, three angle knives, a register, a delay element, a function memory block, the input of the generator correction factor is connected to the input in parallel with the first counter recording whose BxoJ recording resolution is connected to the input recording the correction factor of the generator, the input of the reset of which is connected sinusoidal function, i.e. the information to the reset input of the first counter, the output from the memory block 11 is read at addresses 0.1 6.32 ,. .., 240, Oh, 16, 32 ,, .. ..., 240. Similarly, there is work for all harmonics. Mode II - generation of sinusoidal images in the range of two adjacent harmonics. At the output of counter 3, all units, counter 4 - zeros. The input 16 receives a single potential. Input 15 receives a signal over which the value of S is written to counter 1 (e.g., O). The signal at input 17 starts the operation of the pulse generator 2. In the same way as described above, writing to register 9 takes place, forming line and frame sync pulses. After a pulse arrives at the input of the counter 3 at the output of the multiplier 6 - O, after the second - 1, after the third - 2, etc. Then with the first harmonic at the input 22 at the output of the adder 7 - O, 9, 18, .. ,, with the second one - O, 17, 34, ... and Tod. After the image frame has been completed, the pulse of overflow of counter 4, synchronizing the end of the frame, arrives at the counting input of counter 1, increasing its value by 1 (S + 1), i.e. . Then the information from memory block 11 is read for a new image at the first harmonic from the addresses O, 10, 20, ... the course of which is connected to the first information input of the first multiplier, the second information input of which and the first information input 25 of the second multiplier is connected to the output of the second counter, the counting input of which is connected to the output of the pulse generator, the start signal of which is connected to the start input of the generator, the input of the harmonic number of which is connected to the information input of the register, which is connected to the second information input of the second the multiplier, the output of which and the output of the first multiplier are connected to the first and second information inputs of the adder, the output of which is connected to the address input of the value memory, function, output cat cerned connected to the first data input of the third multiplier, a second information input of which is connected to the input of oscillator amplitude informasch1snny whose output is connected to the output of the third multiplier, otlichayu40 45 50 u with the fact that, in order to expand the class of tasks to be solved by enabling the generation of periodic test images of different scales and formats, a third counter and a 1-SHI element are introduced into it, the overflow output of the first counter being connected to the counting input of the third counter delay element - to the output of the clock pulse of the generator, the input of the installation of the number of rows of the image of which is connected to the input of the parallel recording of the third counter of the overflow output When the image format of M 2 changes (for example, M - 16), the first harmonic of the output image (1 1) will be generated at a K 2 (K 2) scale factor. If it is necessary to generate another periodic image, the corresponding function is recorded in memory block 11. Invention Formula A digital periodic function generator containing a pulse generator, two counters, an adder, three angle knives, a register, a delay element, a function memory block, the input of the generator correction factor is connected to the input in parallel to the first counter, whose recording resolution BxoJ is connected to input recording factor correction generator, input-reset which is connected  the reset input of the first counter, the output of which is connected to the first information input of the first multiplier, the second information input of which and the first information input 5 of the second multiplier is connected to the output of the second counter, the counting input of which is connected to the output of the pulse generator, the start signal of which is connected to the start input of the generator, the input of the harmonic number of which is connected to the information input of the register, which indicator is connected to the second information input of the second multiplier , the output of which and the output of the first multiplier are connected to the first and second information inputs of the adder, the output of which is connected to the address input of the value memory, function, output of which It is connected to the first information input of the third multiplier, the second information input of which is connected to the amplitude input of the generator, the information output of which is connected to the output of the third multiplier, which distinguishes 0 five 0 u with the fact that, in order to expand the class of tasks to be solved by enabling the generation of periodic test images of different scales and formats, a third counter and a 1-SHI element are introduced into it, the overflow output of the first counter being connected to the counting input of the third counter delay element - to the output of the clock pulse of the generator, the input of the installation of the number of rows of the image of which is connected to the input of the parallel recording of the third counter of the overflow output .connected to the first input element input of the second multiplier, OR, the counting input of the first counterinput recording the harmonic number of the generator, the output of the generator frame sync pulse is connected to the second input of the ailer, scale factor input OR whose output is connected which is connected to the third information to the register control input.