SU1545259A1 - Device for recording time signals on magnetic carrier - Google Patents

Abstract

The invention relates to instrumentation, in particular to the technique of magnetic recording. The aim of the invention is to increase the recording density of markup signals on magnetic media by transcoding the information signal with an error-correcting code. A device for recording time signals to a magnetic medium contains a group of pulse counters by the number of digit-number marks, for example, an electronic clock 1, a code comparison unit 2, a reference frequency generator 3 associated with an output on one side with a counting input of the first additional pulse counter connected by the outputs with the first group of inputs of the code comparison unit, and on the other hand with the first input of the And 8 element, connected with the output from the recording head 9. An element OR 31, the first and second blocks 11 and 12 of forming a number code, a switch 13 with code control, for example a set of multiplexers, as well as a pulse shaper 24 pulses and a second additional pulse counter 28 are introduced into the device. 3 il.

Description

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signal of the noise-resistant code. A device for recording time signals on a magnetic medium contains a group of pulse counters by the number of digit-tag bits, for example, electronic clock 1, code comparison block 2, reference frequency generator 3, connected by a single-side output to the counting input of the first additional JQ counter pulses connected by outputs to the first group of inputs of the code comparison block, and on the other hand to the first input of the AND 8 element, connected by the output from the recording head 9, the OR 31 element is entered, the first and second AND blocks, and 12 generating the code number, the switch 13 with the control code, such as a set of multiplexers and the pulse generator 24 and counter 28, a second additional pulses. 3 il.

The invention relates to the field of information accumulation in instrumentation engineering and can be used as a device for marking magnetic media.

The purpose of the invention is to increase the recording density due to the noise-resistant coding of time signals.

Figure 1 presents the block diagram of the device; figure 2 shows time diagrams; FIG. 3 is a circuit diagram of a switch with code control,

The device contains an electronic clock 1 with four counters (minutes, tens of minutes, hours, tens of hours), code comparison block 2 (includes an inverter), reference frequency generator 3, connected by an output to counting input 4 of the first counter 5, connected to the outputs with the first group 6 of the inputs of the unit 2, as well as with the first input 7 of the element AND 8, the output of which is connected to the recording head 9 coupled to the magnetic carrier 10.

Blocks 11 and 12 form a number code, for example, Twelve (code 1100) are connected to the switch 13, while blocks 11 and 12 are made in the form of four-contact strips. The switch 13 (FIG. 3) is made on four multiplexers, the same inputs XI-Hb of which are combined into six groups 14-19, forming groups of inputs, and connected to the outputs of blocks 11 and 12, respectively. The control inputs of the same name AO-A2 multiplexers form the inputs 20 for controlling the switch 13 and are connected to the outputs of the counter 21.

The outputs of the multiplexers form the code output 22 of the switch 13, which is connected to the second group of 23 inputs of block 2.

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The switch 13, in case of successive changes in the states of the counter 21, is connected in series to the inputs 23 of the block 2. The inputs of the block 11 are the code of the unit, the counter of the minutes, the counter of the ten minutes, the counter of the hours, the counter of the ten hours, the block 12.

Pulse generator 24 is connected to output 25 with output 26 of the inequality of the 2nc block codes by the second input element 27 And 8, Shaper 24 is executed on a pulse counter 28, the counting input of which is connected to the output of generator 3 for delaying the pulse for an interval equal to two periods of the generator signal. The start of the former 24 is provided with signal clearing. Setting to zero from the reset input of the counter 28.

Counter 21 is connected by a counting input with output 29 of generator 24 and with the first input 30 of the element OR 31, the output of which is connected to the reset input of the counter 5. The reset input of the counter 21 is connected to another input 32 of the element OR 31, and its outputs are connected to the inputs 20 of the switch 13 and the inputs of block 33 of the account blocking, the output is connected to the third input 34 of the element AND 8.

Block 33 is triggered by the code of the number Six on the outputs 21,

The device works as follows.

When recording tag numbers (for example, 12 h 59 min) on a magnetic tape at an arbitrary time t /, a pulse is applied to the reset input of counter 21 and counter 5 (the Record command). The signal of the counter 21 switch 13 connects the outputs of the block 1I to the inputs 23 of block 2, from the output of which

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This is a sign that the code value of the counter 5 does not exceed the code value of the block I1.

The signal 1 at the output of block 33 (Fig. 2b) permits the operation of counter 21 as well as the arrival of pulses from the generator 3 into the recording head 9 (Fig. 2d). These pulses also go to counter 5, the contents of which increase to a value of Thirteen, which is one more than the value of the code of block 11. At the time of the decline of this pulse, the outputs of counter 5 are set, for example, the code of number Thirteen, with the result that output 26 of block 2 and input 27 of element 8 and 8 as well as the reset input of counter 28 appears signal O, prohibiting the flow through the element 8 imp pulses in the head 9 from the generator 3 and. resolving the account in the counter 28, which ensures the start of the imaging unit 24.

The pulse groups for blocks 11 and 12 contain a greater number of pulses as compared to the value from hour counter 1. They are an indication of the presence of a mark number during forward or reverse playback.

The 12-by-59-minute code-tag code converted by the device consists of 55 pulses (each pause between pulse groups is counted as two pulses), while in the known device this sequence corresponds to a sequence of 1,259 pulses. This makes it possible to judge the increase in the recording density of the time code in the process of marking the carrier, which is ensured by the transcoding of signals.

Claims (1)

Claims: A device for recording time signals to a magnetic medium containing a group of counters according to the number of time code bits, a code comparison unit, a reference frequency signal generator connected to the input of the first pulse counter connected by the outputs to the first group of code comparison input inputs, and With the first input of the element I, connected by an output to the recording head, characterized in that, in order to increase the recording density due to the noise-resistant coding of time signals, two blocks of pho- code number, the element OR, a switch with a code control, 0 are connected by information inputs to the outputs of the first number code generation unit, the outputs of a group of counters and the outputs of the second number code generation unit, a pulse generator connected between the output of the code comparison unit associated with the second input of the AND element and the counting input of the additional pulse counter connected to 0 by one input of the element OR, another the input of which is connected to the input of the installation- About additional counter, P five 0 new in and the output is connected to the input of the first pulse counter in O1, while the corresponding outputs of the additional pulse counter are connected to the corresponding control inputs of the switch and connected via the additionally introduced block of the account to the additional input of the additional account resolution and the third input of element I. "/ ABOUT Editor L.Gratillo Compiled by N. Makarenko Tehred L. Oliynyk Proofreader I. Musk Order 493 Circulation 477 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 furl Subscription