SU1190402A1 - Method of recording signals consisting of words of sequential binary code on magnetic medium - Google Patents

Abstract

METHOD OF RECORDING TO MAGNETIC SIGNAL MEDIA IN WDCA OF WORDS OF A SEQUENTIAL BINARY CODE, based on dividing the portion of magnetic media reserved for writing each word, into intervals according to the number of bits in each word and remagnetizing in these magnetic units in the presence of a unit of 2, one of a person’s 2-in-one unit will have one of the same time, and 2 times the unit will have a 2-bit discrete, and remagnetization in these 2-by-one units will have a 2-digit binary, each time the units of the 2-by-one will have 2, and the remag of the unit will have a 2-nd unit, and the remag of the unit will have a 2-nd unit, and the recurring bias will be used for the unit of the 2-digit binary in each word and remagnetization in these 2-digit that, in order to increase the fidelity of binary code signaling by ensuring self-synchronization without introducing redundancy during transcoding, before magnetization of the magnetic nose bodies form blocks of two words corresponding to adjacent samples of signals from one of several sources of information, write blocks of two words in magnetic media sections with the number of intervals equal to twice the number of bits in a word, and this bit of the first word of each block of two words are written on odd numbers (L intervals of the corresponding segment, bits of the second word are recorded on even intervals of the same segment and magnetic carrier re-magnetizes at odd intervals if there are code units of the first word, and fourth intervals - in the absence of ones from the code of the second word. about. 4ib o to

Description

1 The invention relates to a device, mainly to an accurate magnetic recording technician. The purpose of the invention is to increase the fidelity of the transmission of binary code signals by providing self-synchronization without introducing redundancy during transcoding. Fig. 1 shows a structural diagram of one of the variants of the device according to the proposed method in Fig. 2, a diagram of signal voltages. Sources A, B, C information (sensors) are generally connected to multiplexer 1 (Fig. 1) which is connected to an analog-to-digital converter (ADC) 2, and they are connected to the frequency grid generator 3, which synchronizes clock pulses frequency bits, words and cycles. The output of the ADC 2 is connected to the input of the 4 word memory block. The control unit 5 is associated with memory blocks 4 and 6. Memory unit 6 is connected through summa 7 modulo two, the second input of which is connected through frequency divider 8 to generator 3, and converter 9 are connected to the magnetic head U of the record. From the output of the ADC 2, the signal (Fig. 2 ot), which is a multiplexed and digitized sample of information sources A, B, C, is recorded in block 4 of the word memory. The operation of the memory block 4 is controlled by the control unit 5 in such a way that the words are recorded sequentially, and the reproduction - by blocks of two words corresponding to adjacent samples of one of the sources. The signal at the output of memory block 4 is shown in FIG. 25 of the cyclic sequence of words A B. C A 2 2 ADC output corresponding to the new sequence A. A. Z Bj, C CU, where the words are grouped into subunits, etc. length 2p bits. Next, the received signal is recorded in block 6 of the memory of bits, and the bits of each subblock a are written sequentially, and the read is interleaved by the bits of the first and second words: a, a2 .-. A a (hereinafter, the first 22 index indicates the number of the word in the block, and the second number of bits in the word). The output of memory block 6 (Fig. 2-6) is fed to an adder 7, where it is modulo-two with impulses at the output of divider 8, which follow with a frequency that is half the bit frequency. The signal at the output of the adder 7 (FIG. 2 g) is a sequence of sub-blocks of the form a a a. n means bit inversion. This signal by the converter 9 is converted to a kind of code without returning to zero, when the polarity of the recording current is switched in the presence of units, and using a magnetic head 10 is recorded on a magnetic tape. The recording current pulses and the magnetization of the tape have the form shown in Fig. 25, and a tape section with a length of 2 liters of bit intervals is assigned to the recording of each subunit, the odd bit intervals of this section are occupied by the bits of the first word, and even ones by the bits of the second word block, and the carrier is magnetized at odd bit intervals in the presence of units of the first word code, and at even intervals in the absence of units of the second word code. In real recording systems based on the requirements of the Kotelnikov theorem, for one period of each analog signal there are more than two samples. Therefore, between two samples, the analog signal cannot change to full scale (from the digital value of 00000 to 11111). Consequently, in the proposed method, on the tape segment with a length of 2p bit intervals, all intervals cannot be found without remagnetization, just as they cannot be all with alternation and remagnetization. Limiting a series of zeros provides a self-synchronization of the signal, and limiting a series of units allows you to create a frame marker from (4n-l) units that is different from the information flow. Since in the proposed method all words of the source binary code are used, it

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Claims (1)

METHOD FOR RECORDING TO A MAGNETIC SIGNAL CARRIER IN THE TYPE OF WORDS OF A SERIAL BINARY CODE, based on dividing the portion of the magnetic medium reserved for recording each word into intervals by the number of bits in each word and magnetization reversal in these intervals of the magnetic medium in the presence of binary code units, I distinguish the fact that, in order to increase the fidelity of the transmission of binary code signals by ensuring self-synchronization without introducing redundancy during transcoding, before magnetization reversal blocks of two words corresponding to adjacent samples of signals of one of several sources of information are written, blocks of two words are recorded on sections of a magnetic medium with the number of intervals equal to twice the number of bits in a word, while the bits of the first word of each block e SS of two words is written at odd intervals of the corresponding section, bits of the second word are recorded at even intervals of the same section and magnetized magnetically at odd intervals in the presence of code units of the first word, and at even intervals in the absence of code units of the second word. 1 1190402 2