SU766037A1 - Pulse selecting device - Google Patents

Description

The invention relates to television and can be used in applied television technology devices. A device for selecting impulses is known, which contains a coincidence unit, the first input of which has an input signal, three OR elements, a time resolution shaping unit that includes the first delay line, whose input is connected to the output of the coincidence unit, and the first output of the first delay line through the first element OR is connected to the first input of the strobe pulse generator, and the second output of the first delay line through the second element OR is connected to the second input of the strobe pulse generator, the output of which is connected to V rum entry block matcher L. However, the known apparatus can not process signals from moving objects neskopkih finds schihs in the box frame. The purpose of the invention is to improve the accuracy of selection of video pulses. To do this, the pulse selection device containing a coincidence block, the first input of which has an input signal, three OR elements, a time resolution shaping unit, which includes the first delay line, whose input is connected to the output of the coincidence block, the first output of the first line the delay through the first element OR is connected to the first input of the strobe impedance generator, and the second output of the first delay line through the second element OR is connected to the second input of the strobe impedance generator, the output of which is connected To the second input of the coincidence block, N blocks of time interval formation are entered, each of which consists of K (K 2,4,6 ..) delays, a strobe pulser and a coincidence block, while the output of the strobe pulses is connected

to the first input of the coincidence unit, and the output of the device is connected through the coincidence unit to the inputs to the delays pin, while the outputs of all the delay lines of each of the k blocks of the prohibition time intervals are connected to the corresponding inputs of the third OR element and to the fourth entered OR, the third output its element OR connected through

entered the second delay line to the input of the first OR element, and the output of the fourth OR element to the second clock of the strobe pulse generator; the input of the first delay line is connected via the second OR element to the second gate generator pulse, and the second output of the first delay line of the resolution time-shaping unit connected to the input of the entered I th block of coincidence through the entered and sequentially connected blocks of coincidence, each of which consists of a key and a delay line, while the output of the key is connected to the input of the delay line, wherein the first and second outputs of each of the N blocks of coincidence block formation are connected to the corresponding inputs of the first and

the second element OR, and the first and second inputs of each of the N keys are connected respectively to the input of the first delay line and to. the corresponding outputs of the preceding delay lines of the coincidence blocks, the time interval shaping unit; the solution, the frame sync bus through the first OR element is connected to the first input of the strobe pulse generator, the first inputs of the strobe pulse generator are connected in the first block of the formation of the time interval of the prohibition to the frame sync pulse, and in the others - with the output of the block of the previous block forming the time intervals the prohibition, and the second inputs of the strobe pulse generators are connected in the first block of the formation of the prohibition time intervals with the output of the coincidence block, and in the rest of them - through Element OR with the output of the block of coincidence with the common frame sync pulses,

The drawing shows the structural electrical scheme proposed

devices.

The device for the selection of pulses contains a block 1 match, generator 2

gating pulses, the block 3 forming time intervals raresheni, consisting of the first delay line 4 and P additionally entered blocks 5 matches, each of which consists of a delay line 6 and a key 7, four elements OR 8, 9, 10 and 11, an additional line The decelerations 12 and N of the block 13 for the formation of time intervals of the prohibition, each of which consists of a block 14 of coincidence, a generator 15 of strobe pulses, and K for delay lines 16, and starting from the second - and the element OR 17.

The device works as follows.

The frame sync pulse passes the elements OR 8 and 17 and enters generators 2 and 15 opens block 1 and block 14 of the first block 13, and generators 15 and blocks 14 of the coincidence of the second and subsequent blocks 13 for the formation of prohibition time intervals. The first horizontal impulse of the trace of the first object passes through block 1 and enters output 18 into the channel, through the element OR 9 at the input of the generator 2 stall, which closes block 1, at the input of the delay line 4, at the locking inputs of the keys 7 and through the open block 14 of the first block 13 to inputs K of delay lines 16 of the first block 13. In addition, a signal from the output (block 14 of the first key 13 is transmitted to the breakdown input of the generator 15 of the first block 13, block 14 of the first block 13, and to the start input of the generators; 15 other blocks 13, closing the blocks 14.

After a time equal to the difference in the horizontal scanning period and half the resolution time interval, a pulse comes from the first output of delay line 4 through the OR 8 element to the generator 2, which opens up block 1 for passing the second horizontal trace of the first object to the channel. The second lower case pulse, having passed block 1, goes to output 18, to the input of delay line 4, to block 14 of the first block 13, through the element. OR 9 to generator 2, to the locking input of key 7, and through from the left block 14 of the second block 13 on. To the delay lines 16 of the second block 13 for the formation of time intervals for: preta, from the output of this block 14 further through the element OR 17 to the generator 15 and to the start input of the generator 15, the pulses of the pulses of the next block 13 for forming the time intervals of the prohibition. The generator 2 closes block 1, and the generator 15 blocks 14 of the second block 13 after a time equal to the duration of the resolution time interval, a pulse arrives through the element OR 9 at the input of the generator 2 from the first output of the delay line 4. This impulse is also fed to the signal input of the key 7 of the first cascade of the block 3 for the formation of time slots. In a number of cases, due to, for example, changes in the brightness of individual parts of an object, depending on a change in the lighting condition or rotation of the object of observation, gaps of individual strobes of the volume trace are possible. In the case of such a skip, the block 3 for forming time slots of the solution works as follows. In the case of skipping the line impulse trail of the object to the locking input of the key 7, this impulse does not arrive and it is open. Therefore, the signal from the first output of the delay line 4, delayed by the duration of the resolution time interval relative to the other output, via the switch 7 of the first stage of the resolution time interval shaping unit 3 enters the input of the delay line 6, and the second output of the delay line 6 of the first cascade receives a signal delayed by time equal to the duration of the horizontal scan minus the duration of the time interval resolution, through the element ILY8 on the input of the generator 2 and unlocking the input key 7 of the next stage. After a time equal to the duration of the resolution time interval, from the first output of the delay line 6, the OR 9 element receives a signal at the input of the generator 2 and the sending input of the switch 7 of the next stage. The generator 2, in its turn, closes the block 1. If the line pulse trace of the object passes again, the device operation is similar. If the line impulse of the object trace appears again, the key 7 is locked and the formation of time resolution intervals is performed using delay line 4 and generator 2. In case the object trail has ended, the keys 7 of all formation units 3 (Resolution time intervals are opened and the signal passes through the delay line 4 through the element OR 9 to the input of the generator 2 and through the public key 7 to the input of the delay line b The delayed pulse from the second output of the delay line 6 of the first to the cascade through the element OR 8 arrives at the open input of the generator 2. From the first output of the delay line 6 of the first cascade, delayed by a time equal to the duration of the resolution time interval relative to the second OUTPUT through the OR 9 element to the breakdown input of the generator 2 and through the public key 7 of the next cascade to the input of the delay line 6 of this cascade, etc. The number of resolution time intervals formed after the termination of the object tracks clearly the number of stages of formation of time resolution intervals. Then, with the arrival of the next frame sync pulse, block 1 and block 14 of the first block 13 are reopened, and the remaining blocks 14 of the coincidence blocks of all prohibition blocks 13 are closed. After a time equal to the frame duration minus the length of the multiplication line by K, minus half the prohibition interval relative to the arrival of the first horizontal pulse of the first object, the first output of the delay line 16 of the first block 13 through the OR 11 element receives a pulse at the input of the generator 2, which locks the block 1 , and through the element OR 10 to the input of the delay lingg 12, from the output of which, through the sack, is equal to the duration of the inherent prohibition interval, through the element OR 8, a pulse arrives at the input of the start of the generator 2, and block 1 opens through time equal to the frame duration minus the row length multiplied by K and plus half of the inhibition interval, relative to the arrival of the first horizontal pulse of the first object, From the output of the delay line 16 of the first block 13 through the element OR 11 the pulse goes to the output of the generator 2, which closes unit 1, and through the element OR 10 to the input of the zadernasi line 12, from the output of which after a time equal to the duration of the prohibition interval, a pulse is received through the element OR 8 to the input of the start of the generator 2,

and block 1 is opened, etc. After a time equal to the frame duration minus. The line strength and minus half of the inhibition interval, from the output of the delay line 16 of the first block 13 a pulse arrives at the input of the generator 2, which closes block 1, and the input of the delay line 12, from the output of which, after a time equal to the duration of the inhibit time interval, to the start input of generator 2, and block 1 is opened. After a time equal to the sum of the frame duration and the length of the multiplication line by K without the duration of the inhibition interval, a pulse is sent from the output of the delay line 16 of the first block 13 to the input of the generator 2, which closes the block 1, and to the input of the delay line 12, from the output which, after a time equal to the duration of the time interval of the prohibition, receives the corresponding impulse.

In this way, the prohibition field from the first trace of the first object is formed. From each subsequent trace of the object, the scheme works in a similar way.

With the arrival of the first row pulse of the second object, the operation of the device is carried out as described above.

After the selection of the pulses of the trace of the last object, the second cycle of selection begins, and so on.

Claims (1)

1. USSR author's certificate number ZO5575, кп. N OZ K 5/18, 1969 (prototype).