SU417917A1 - - Google Patents

Description

DEVICE OF ELECTRONIC RECORDING VIDEO SIGNAL

one

An electronic video recording device relates to the field of television technology, in particular, to devices for element-by-element electronic recording of video signals of a static image.

Electronic video recording devices are known in which video information is recorded on a target of a transmission tube by modulating the current density of an electron beam.

However, these devices have a small depth of potential relief formed on the target when recording at a standard decomposition rate.

The purpose of the invention is to improve the quality of the recording.

This is achieved due to the fact that the driver of the shift pulse sequence is connected to the output of the master oscillator, the second input of which, as well as one of the inputs of the reset pulse generator, is connected to the output of the synchronizing generator. The output of the shifting pulse shaper is simultaneously connected to the shaper of the pulses for resetting, interrogating, recording and stopping. The output of the polling pulse generator is connected via an amplitude-pulse modulator to an intermediate memory unit, the second input of which is connected to the output of the write pulse generator, and its third input and the second input of the stop pulse generator are connected to the output of the reset pulse generator. The output of the intermediate memory unit is connected to the cathode of the transmitting television tube via the recording video amplifier, and the output of the stop pulse generator via an additional horizontal sweep generator is connected to

compensating line coils.

The electronic video recording device is shown in the drawing.

The output of the master oscillator 1 is connected to the input of the imaging unit 2 of a shear pulse sequence, the second input of which is connected with the output of the clock generator 3 and the second input of the imaging generator of the reset pulses. The output of the imaging unit 2 is connected to the input of the imaging unit 4 reset pulses,

with inputs of fi i and processor 5 polling pulses, imager 6 write pulses and imager 7 stop pulses. The second input of the forcing unit 7 of the stopping pulses is connected to the output of the imaging device of the 4 reset pulses and with the second input of the intermediate memory element 8, one of the inputs of which is connected to the output of the forming device 6 of the recording pulses, and the third input to the output of the pulse amplitude modulator 9 associated with the output of the imager 5 polling pulses. The output of the intermediate memory element is connected to the video recording amplifier 10. The output of the imaging unit 7 stop pulses is connected to the input of an additional horizontal scanning generator, the output of which is connected to compensating line coils 12, additionally introduced into the focusing-deflecting system 13.

The master oscillator 1 generates a signal whose frequency is a multiple of the line frequency n of the frames of the standard decomposition, as well as the frequency of laying the elements during recording. The clock generator 2, the horizontal scanning generator 14, the vertical scanning generator 15, and the horizontal deflection coils 16 are no different from those of the standard transmitting camera. Shaper 7 generates a signal whose frequency is a multiple of the line frequency, and the phase changes discretely with the frame rate by the length of the expansion element in the line. The leading edge of the signal serves to generate the polling pulses, the duration of which does not exceed the decomposition element. The same signal is the original signal for the formation of reset pulses and stop pulses.

The stop pulses trigger an optional line scan generator, which forms a sawtooth compensating current. This current deflecting current forms the resulting deflecting zero. Thus, the introduction of a compensating sweep allows for a complete stop of the electron beam, with the temporary stop position changing from frame to frame by the value of the decomposition element.

The polling pulses are fed to the amplitude-pulse modulator 9 and the video signal is sampled, the duration of which is equal to the value of the decomposition element. Since the increase in recording efficiency is possible only when the recording time is increased by the electron beam stopped above the target element, it is necessary to increase the duration of the video signal element modulating the electron beam during the time of the transition. This is achieved by introducing an intermediate memory element 8, which expands each video sample.

Each sample of the video signal is fed further to the video amplifier 10 and to the cathode of the vidicon with adjustable memory 17, the output of which is connected to the video reading amplifier 18. After reading the video signal of each expanded element from the memory block, this sample is erased with a reset pulse.

The device records the video signal on the target of the vidicon over time.

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T T

 chap - i and

ML

e GK - period frame scan

(40 microseconds); 7p - horizontal scanning period

(64 microseconds); t is the number of recording pulses

on every line;

L / - the duration of the elements of decomposition

one

 f2f,

Re. - the upper frequency spectrum of the original television signal. The number of recording impulses varies, it is possible to record a standard TV frame (static) over a time varying

N

practically from 2G, ((with t -, N is the number of decomposition elements) to with t.

Subject invention

An electronic video recording device containing a series-connected master oscillator, a sync generator and a horizontal scanning generator, a vertical scanning generator, a transmitting television tube with adjustable memory and compensating horizontal rollers, video recording and reading amplifiers, characterized in that, in order to improve the recording quality, the output of the master oscillator is connected to the driver of the shift pulse sequence, the second input of which, as well as one of the inputs of the driver of the pulse in reset, they are connected to the output of the synchro-generator, with this. The output of the shifter pulse shaper sequence is simultaneously connected to the shaper of the reset, interrogation, recording and stop pulses, the output of the interrogator pulse generator is connected to the intermediate memory block, the second input which is connected to the output of the write pulse former, and the third input of which to the second input of the stop pulse former is connected to the output of the reset pulse former, the output is intermediate The second memory block is connected to the cathode of the non-generating television tube via the video recording amplifier, and the output of the stop pulse generator via the additional horizontal scanner is connected to the compensating line coils.

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