SU503282A1 - Method of reproducing digital information from multi-track waveforms - Google Patents

Description

one

This invention relates to a magnetic recording technique.

There is a known method of reproducing digital information from a multi-track waveform by memorizing information from each line reproduced from different recording tracks and outputting it from a polling pulse generated from the trailing edge of the signal obtained by adding together the information signals from several tracks of the line.

With increased recording densities, the influence of spurious amplitude modulation and carrier skew leads to a decrease in the amplitude of the reproduced signal and to the fragmentation of the generated information and polling pulses, which causes malfunctions in the operation of the devices, realizing their method.

In order to reduce the number of failures, signals reproduced in a known manner are proposed to half-time rectify before addition.

Reproduction of information on the proposed method is carried out as follows. The digital information reproduced from all channels of the recording line is amplified by pre-reproduction amplifiers operating in a linear mode, and is fed to memory devices that can only be output by a polling pulse. With the help of semiconductor valves, positive or negative half-waves of these signals are extracted and in the future they are added to the voltage of the half-wave by a voltage adder. The falling edge of the information pulse of the line, obtained by adding the voltage of a positive or negative half-wave signal, is reproduced directly from

magnetic waveforms on all channels of the recording line and amplified by a linear amplifier, form a interrogation signal, through which information of all channels of the recording line of the device is simultaneously output.

The advantages of the proposed method consist in the fact that when adding the rectified signals due to the long duration of the fronts of the latter, the splitting of the signals is eliminated and, accordingly, the equipment fails.

Claims (1)

Invention Formula A method of reproducing digital information from a multi-track waveform by storing the information of each line reproduced from different recording tracks and outputting it from a polling pulse generated on the falling edge of the signal obtained by adding together the information signals reproduced from several tracks of the line, with the aim 4 reducing the number of failures, the reproduced signals are half-rectified before being added halfway through.