SU617774A1 - Arrangement for processing information recorded on magnetic carrier - Google Patents

Description

one

The invention relates to the field of instrumentation and computing technology and is intended for processing with automatic selection of informative and reliable information from the general information flow recorded on a magnetic medium.

Methods are known for improving the noise immunity of information transmission systems 1 using noise-resistant codes.

Such methods are applicable only to digital systems.

A device for processing information accuracy control 2 is known, comprising a reproducing unit connected to a computational and recording unit, blocks controlling the level of a reference calibration signal, nonlinear distortion, the noise in the transmission path and the magnitude of impulse noise, the outputs of which are connected to the analyzer, the threshold circuit and inverter.

A disadvantage of the known device is that when processing information, the computing and recording unit processes and records the results for the entire time period of recording information during the experiment, while the practice of information processing shows that information of interest is often intermittent. -britty character.

The purpose of the invention is to automate the selection of meaningful and reliable information.

The goal is achieved by introducing an additional information reading head into the playback unit, located in front of the main head as the magnetic carrier moves, and a playback signal amplifier connected to the output of the control unit and the threshold circuit connected to the output of the additional head the computational and recording unit is connected to an I circuit, one input of which is connected to the output of the threshold circuit, and a second input through the inverter to the output of the analyzer.

The drawing shows a block diagram of the proposed device.

The device contains the main and additional heads 1 and 2 of the reading of the reproducing unit, amplifiers 3 and 4 of the reproduction signal, threshold circuit 5, circuit 6, computing and recording unit 7, block 8 controlling the level of the calibration signal, block 9 controlling the level of nonlinear distortions, block 10 control

noise level, block 11 of the instantaneous (impulse) distortion control, analyzer 12 and inverter 13.

The operation of the proposed device is based on the principle of delaying the signal in the main information circuit between the reproducing unit and the computation and recording unit with respect to the on / off control circuit of the computing and recording unit and the control circuit of the processed information for a time equal to the determination time of meaningful and reliable information and on time computing and recording unit.

In the proposed device, the delay time is determined by the distance of the shift of the additional read head towards the two; magnetic carrier relative to the main read head and the speed of the magnetic carrier pulling by the reproducing unit.

Information from the additional read head 2 is fed to the input of the playback signal amplifier 4, the output of which is fed to the input of the threshold circuit 5 and, at the same time, the calibration sinusoidal signal is transmitted in parallel to the control information blocks 8-11 on the control channel.

The calibration signal level control unit 8 notes the change of the reference signal beyond the permissible levels according to previously accepted criteria. The nonlinear distortion level control unit 9 notes that the nonlinear distortion level is exceeded, and block 10 monitors the transmission path noise level.

Unit 11 assesses the level of instantaneous (pulsed) interference.

Signals about the output of the reference signal beyond the permissible levels, the excess of permissible nonlinear distortion and noise in the transmission path, the occurrence of instantaneous (impulsive) interference are fed to the inputs of the analyzer 12, where the overall assessment of the quality of the processed information is carried out.

The analyzer 12 generates an invalid signal, which is fed to the input of the inverter 13, from the output of which the signal passes to one of the inputs of circuit AND 6. If the information is recognized as substantial, from the output of threshold circuit 5, a signal arrives at the other input of circuit AND 6.

With simultaneous receipt of signals from the inverter 13 and the normal circuit 5 to the inputs of the circuit And 6 from the output of the circuit And the signal is sent to turn on the computing and recording unit 7.

By the time the computing and recording unit 7 is turned on, information from the main reading head 1 through the amplifier 3 of the reproduction signal is fed to the input of the calculating and recording unit and the content information is processed and recorded from the common information flow

and reliable information.

In the event that the control unit turns on and off the unit for calculating and registering incomplete information and unreliable information in

the control circuit of the processed information from the output of the circuit And 6 receives a signal to turn off the block 7 of calculation and registration. If necessary, analysis and processing

All registered information is switched off by turning the control circuit on and off of the calculating and registering unit, and the operation of the proposed device is similar to the operation of a known processing device with control of the reliability of information.

Claims (2)

1.VS Malov and Ya. A. Kupershmidt Telemetry. M., “Energie, 1975, p. 100- 112. 2. USSR author's certificate number 453694, cl. G 06 11/00, 1973.