SU705503A1 - Method of multitrack recording and display of data - Google Patents

Description

one

The invention relates to instrumentation, and namely, magnetic recording and reproducing methods, and can be used in memory devices with a Moving information carrier.

There is a known method of recording, information, including the operation of modulating the original signal, recording and demo after playback.

However, in order to demodulate the reproduced detonation compensation signal, it is necessary to alphabetical time intervals for sampling information of each channel.

The closest in technical essence to the application is the method of multi-track recording and playback of information on magnetic media, which consists in that. that the magnetic carrier peremagnetizes two levels to saturate the signals, measure their temporal position according to the law of latitudinal impulse modulation, reproduce the recorded signals and form the initial pulse lattice 2.

However, the recording density is not sufficient. This method does not allow to increase the recording density, as it is limited by the presence of backup signal zones, the final and initial signal, with maximum and minimum deviations of two adjacent signals.

The aim of the invention is the overlap of the situation.

Claims (2)

This is achieved by the fact that in the method of multi-track recording of information on a magnetic carrier, in which the signal of the reference frequency is recorded onto a separate track, and on the other tracks, the carrier is shifted along two levels to saturation with pulse-width modulated signals with one modulated front, the recorded signals are reproduced and form the source; Before recording, divide the frequency of the pulse-pulse and the sequence into two on modular fronts and record it on the carrier, the reproducing signals form imgly-m and transition points of the reproduced signals by zero and zero to restore the original sequences of each track u formed sequences of pulses of each track with formed sequences of pulses of the reference frequency. FIG. 1 shows a block diagram of a multi-track recording and reproducing device; in fig. 2 - diagrams we explain the proposed method. The implementation of the method is carried out by a device (Fig. I), which contains sources 1, 2 of a pulmonary modulated (PWM) signal, reference generator 3, frequency dividers 4-6, recording amplifiers 7-9, recording heads 10-12, reproducing 13–15 drive heads, playback amplifiers 16–18, and shapers 19–25. The proposed method is implemented as follows. Information sources 1, 2 of the PWM signal and the signals of the generator 3 of the reference frequency are sent to the corresponding frequency dividers G 4-6. The healers 4, 5 work in the mode of dividing the frequency of the PWM signal of the joudui edged fronts, and the frequency divider 6 operates in the mode of forming a sequence of pulses of the Meander type from the bnbpioir signal. Magnetic media data transfer operation employs recording amplifiers 7-9 in conjunction with recording heads 10-12. The reproduction of information is carried out by the reproduction heads 13-15 together with the reproduction amplifiers 16-18. The formers 19–21 are devices that output the pulses at the time of the reproduced signal through O. Formers 22, 23 combine the pulses corresponding to the reference and modulated signals into a common sequence. The waveforms (Fig. 2) explain the operation of the recording and reproducing of information. The waveform 2a shows the nature of the PWM signal before conversion, and the waveform 26 shows the temporal position of the reference frequency pulses. Signal waveform 2c explains the principle of dividing the frequency of the PWM signal by the modulated edges and the result of an increase in recording density. Signal signal 2g reflects the construction of a sequence of pulses of the Meander type from the reference signal. On the waveforms 2d and 2e shows the nature of the reproduced signals modulated and reference. The waveforms of 2g and 2z show the formation of pulses From the reproduced signals modulated and reference, and the signalogram 2i shows the result of combining the pulses presented on the waveforms 2g and 2h into a common sequence. The use of the proposed method of recording and reproducing information provides an increase in recording density in comparison with existing methods of PWM recording, which increases the efficiency of information transmission through the magnetic recording path. The method of multi-track magnetic recording and reproducing information, in which a reference signal is recorded on a separate track, and on other tracks, the carrier is re-magnetized in two levels until it reaches Pulse Width Modulated Signals with a single, modulated front, reproduce the recorded signals and form the original pulse sequences, characterized in that, in order to determine the recording density, before the recording, the frequency of the pulmonary sequence is divided by va fronts on the modulated and recorded to the medium, and when playing the pulses formed at the moments when the reproduced signalovcherez zero and for reconstructing the original sequence of each track combined sequence of pulses generated each track with the pulse sequences generated reference frequency. Sources of information taken into account during the examination 1. USSR author's certificate No. 528595, cl. G jl B 5/02, 1974. 2. Davis G. L. The use of accurate magnetic recording. M., Energie, 1967, p. 57-62 (prototype). ff 15 ZQ gz Zl --J