SU1304063A1 - Method of recording digital information on magnetic medium - Google Patents

Abstract

The invention relates to instrumentation and allows for increasing the linear M7 density of recording digital information without reducing its reliability by dividing a digital code into successive groups of three binary bits, recording the unit and zero of the first two bits as a change in the carrier magnetization on the first and second tracks, respectively. magnetic carrier and the third bit in the second recording cycle by changing the magnetization on the track on which the magnetization was not changed according to enno value of the second discharge at the coincidence of the values of the first and third discharge groups in the form of rows and no change with opposite values of them. 1 il. OS about 4 ;: О О5 with Ш1

Description

The invention relates to instrumentation, in particular to methods of digital magnetic recording of information on a movable magnetic carrier.

The purpose of the invention is to increase the linear density of the recording.

The drawing shows timing diagrams explaining the method of recording digital information on magnetic media.

There is a method according to which

If the signal "units" change the carrier magnetization on the first track, if there is a signal "zero, the second signal of the third bit of the group is recorded in the second cycle as a change in the magnetization on the track that was not changed by changing the magnetization of the carrier when the signals of the first and third bits coincide, a change is made in the magnetization of the group's 10-spins, and in the form of no measurements on the first track when recording the magnetization signal opposite values of the signals of the first and third bits of each group (diag. a, b).

There is a lot of units and, on the second, when recording signals of zeros, and the carrier magnetization on the other track is additionally changed when recording sequences of identical signals (diagram a, b).

Diagrams a, b show the recorded code sequence and changes in carrier magnetization on the first and second tracks according to a known method, diagrams c, d show the same code sequence and changes in carrier magnetization on the first and second tracks according to the proposed method.

According to the proposed method, the digital code is divided into consecutive groups of signals from three binary bits (diagrams c, d, where the roman numerals indicate the sequence numbers of the bits in each successive group of signals from three bits). The first and second bits of each group of signals are recorded by changing the carrier magnetization on the first and second tracks, respectively, to the value of the discharge, i.e.

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Claims (1)

Invention Formula The method of recording digital information on magnetic media, based on recording the signals of "units and" zeros of a digital code on two tracks of the carrier by re-rotating the carrier on the first track in accordance with the signals of "digital code units, and on the second one with signals" of zeros, so that, in order to increase the linear recording density, the digital code signals are divided into successive groups of signals from three binary bits, the last of which is recorded in the second clock interval of the group recording only when the and its value with the value of the signal of the first discharge of the group in the form of a change in the magnetization on the track where no reversal was performed according to the value of the signal of the second discharge of the group. If the signal "units" change the carrier magnetization on the first track, if there is a signal "zero, the second signal of the third bit of the group is recorded in the second cycle as a change in the magnetization on the track that was not changed by changing the magnetization of the carrier when the values of the signals of the first and third bits of the group coincide, and in the form of the absence of a change in the magnetization at Invention Formula The method of recording digital information on magnetic media, based on recording the signals of "units and" zeros of a digital code on two tracks of the carrier by re-rotating the carrier on the first track in accordance with the signals of "digital code units, and on the second one with signals" of zeros, so that, in order to increase the linear recording density, the digital code signals are divided into successive groups of signals from three binary bits, the last of which is recorded in the second clock interval of the group recording only when the and its value with the value of the signal of the first discharge of the group in the form of a change in the magnetization on the track where no reversal was performed according to the value of the signal of the second discharge of the group.