SU744662A1 - Device for documenting television images - Google Patents

Description

(54) DEVICE FOR DOCUMENTING A TELEVISION

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The invention relates to automation. And can be used in electrographic systems for documenting information. with

A device for documenting a television image is known, comprising a recording element, recording signal conditioners, a buffer memory unit, and a sampling device .Q signals. The increase in the speed of documentation is achieved due to the buffer memory block for the entire frame of image 1.

The disadvantage of such a device is complexity due to the large volume and size of the buffer memory block.

The closest technical solution to the invention is a device that contains a comparison unit connected in series, the first element I, the first pulse generator, the second element I, the first switch, block, memory, the second switch 25, the second pulse generator and registering element, frame counter and row counter, the outputs of which are connected to the corresponding inputs of the comparison unit, the third element of the DA

IMAGES

I7 one of the inputs of which is connected to the output of the comparison unit, the other inputs to the corresponding outputs of the row counter, and the output to the single input of the frame counter, the pulse selector, one of the outputs of which is connected to the counter input of the frame counter and the zero input of the row counter, another output - to the counting input of the row counter and the corresponding input of the first element I, a trigger, one of whose inputs is connected to the output of the third element And, the fourth element And, one of the inputs of which is connected to the output of the trigger, and the output to the input of pulse selector and the corresponding input of the second element And 2.

The disadvantage of the known device is the low speed due to the fact that it allows to extract a signal from not more than one line from the image frame.

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

The goal is achieved by the fact that in the device containing the Connected | Consecutively unit of comparison, the first element AND, the first driver of the pulses, the second element of the AND / first to the switch, the memory block, the second switch, the second driver of the pulses and the registering element, the counter frames, the outputs of which are connected to the corresponding inputs of the comparison block, the row counter, the third element I, one of the inputs of which is connected to the output of the comparison block, the other / inputs to the corresponding outputs of the row counter, and the output to the unit th input of the frame counter, pulse selector, one of the outputs of which is connected to the counting input of the frame counter and zero input of the row counter, another output to the counting input of the row counter and the corresponding input of the first element And, trigger, one of the inputs of which is connected to the output of the third element And , the fourth element And, one of the inputs of which is connected to the output of the trigger, and the output to the input of the pulse selector and the corresponding input of the second element And, entered the third switch, the inputs of which are connected to the outputs of the counter with line, and outputs - to the corresponding inputs of the comparison unit.

The drawing shows the block diagram of the device.

The device contains a unit 1 of comparison, the first element And 2, the first driver 3 pulses, the second ele-. ment I 4, first switch 5, memory block 6, second switch 7, second driver 8 impulses, registering element 9, 10 frame counter, AND row count, third switch 12, third AND 13 element, pulse selector 14, trigger 15, fourth element and 16.

When installing the trigger 15 in the working position of the fourth element And 16 outputs the video signal to be documented. Pulse selector 14 extracts frame and line clock pulses from the video signal. The frame sync pulses are fed to the counter 10 frame input and to the 11 line meter installation — and the line sync pulses to the 11 line counter input and the first AND 2 element. 2. The 11 line counter output signals go through the third switch 12 to the comparison unit 1. There are also signals from the output of the counter 10 frames. The output signal from the comparison unit 1 through the first element AND 2, the first shaper 3 pulses are fed to the input of the element 4. As a result, the video signal through the first switch 5 is fed to the block 6 pg1m ty from it through the second switch 7 and the second form are 8 pulses on registering

element 9. Signals from the output of the counter 11 lines, in addition, are fed to the inputs of the third element And 13. In addition, a signal from the output of the comparison unit 1 is sold to one of the inputs of this element. The signal from the output of the third element And 13 enters the Reset trigger 15 and reset the counter to 10 frames. The third switch 12 allows you to select the required number of lines from each frame of the image.

Tests of the device showed that it has high speed, which is achieved by simultaneously sampling several lines from each frame of the image.

Claims (2)

1. Teleprocessing systems. Riga, Zinatne, 1977, p. 39-40. 2. Japanese Patent No. 51-26007, cl. 97/5 / IN (prototype).