SU1092559A1 - Device for magnetic recording of digital information - Google Patents

Abstract

DEVICE FOR MAP1ITAL RECORDING 1 DIFFERENT INFORMATION, containing a recording-playback unit, connected to the inputs of the code converter, the outputs of which are connected to the memory unit, the OR element, connected by the output to the first input of the trigger, connected by the output to the first input of the AND element, the recording unit and a counter that differs in that, in order to reduce the magnitude of the magnetic recording of digital information, a Mar- decoder is inserted into it. ker of information word group, connected by inputs to the outputs of the code interpreter and connected by the output to the second input of the {; ment; AND, first AND-NOT element, connected by the first input to the first output of the recording unit and connected to the second input of the trigger, the first additional trigger, connected by the first input to the output of the element I and connected by the output to the first input of the counter, connected in series to the shift register, the second element of the ISI, and the first additional element AND connected between the outputs of the memory block and the first input of the recording unit, the control unit connected in series, the first element. NOT and the first pulse shaper, the third AND-NOT element connected in series, and the second pulse shaper, the fourth AND-NOT element connected in series and the third pulse shaper, the command off delay unit correction of temporary errors, additional element OR, second, third, fourth and fifth additional elements AND, the second and third elements NOT and second, third and fourth additional triggers, etc. Why does the output of the first additional trigger are connected to the first input of the second additional trigger, the output of which is connected to the input of the second NAND element and to the first input of the third additional AND element connected to the first input of the shift register, the output of the depressor tag of the group of information words connected to the first input the fourth additional element And connected to the output with the first input of the third additional trigger n with the first input of the fourth additional trigger connected About the output to the first input of the fourth element IS-NOT, the output of the first pulse shaper is connected to the second input of the third additional trigger connected by the output to the second input of the fourth additional element I, the second output of the recording unit is connected to the first input of the delayed command off terminal control panel, and with the first input of an additional OR element connected by the second input to the recording unit

Description

the output and connected to the first input of the third INE element and to the input of the second element NOT connected to the second input of the first Element IS-NOT connected to the code converter connected to the input of the memory block and the first input of the time error correction block by the third input, connected by the output to the first input of the fifth additional element And, the output of which is connected to the input of the first additional element And, with the second input of the recording unit, with the second input of the third additional element And and with This is the third element NOT connected by the output to the second input of the counter, the output of which is connected to the second inputs of the time error correction block, the shift register, the second additional element AND, and the third and fourth elements AND NONE. and the output of the second pulse shaper is connected to the first input of the OR element connected by the output to the second inputs of the first and second additional triggers and connected by a second input to the output of the third pulse shaper connected to the second input of the fourth additional trigger and the third output of the command delay unit, the output of which connected to the fourth input of the first NAND element, to the second input of the fifth additional AND element, and to the third input of the recording unit.

one

The invention relates to magnetic recording, in particular to devices for magnetic recording of digital information,

A device for magnetic recording of digital information is known comprising a recording unit and a code converter. The device allows to provide magnetic recording of digital information with the relative simplicity of its design. C 1 3 The disadvantage of the known device is the low density of magnetic recording of digital information on a magnetic recording medium.

It is also known device for mag. A digital recording device containing a recording-playback unit connected to the inputs of a code converter whose outputs are connected to a memory unit, a CRPI element connected to the first input of a trigger connected by an output to the first input of an AND element, a recording unit and a count. The device allows a relatively high magnetic recording density of digital information on magnetic recording media 2.

The disadvantage of this device is a significant error of the magnetic recording of digital information.

this is due to the inaccuracy of recording and reproducing groups of information words caused by the starts and the remains of the recording unit and the recording-playback unit.

The purpose of the invention is to reduce the error of the magnetic recording of digital information.

The goal is achieved in that a device for magnetic recording of digital information containing a reproducing unit connected to the inputs of a code converter whose outputs are connected to a memory unit, an OR element connected by an output to the first input of the trigger connected to the code of the first input of the AND element, unit records and a counter, entered the decoder of the information word group marker, connected by inputs to the outputs of the code converter and connected by the output to the second input of the AND element, the first NAND element, the connected the first input to the first output of the recording unit and the output connected to the second trigger input, the first additional trigger connected by the first input to the output of the AND element and connected to the first input of the counter, connected in series to the shift register, the second element II-IE and the first additional element AND, connected between the outputs of the memory unit and the first input of the recording unit, connected in series with the control panel, the first element NOT and the third pulse shaper, connected in series the third element NAND and the second pulse generator, a fourth AND-NOT element connected in series and a third pulse shaper, a command deactivation block, a time error correction block, an additional OR element, a second, third fourth and fifth additional AND elements, a second and third NOT elements, and a second, third and the fourth additional triggers, with the output of the first additional trigger connected to the first input of the second additional trigger, the output of which is connected to the input of the second NAND element and to the pair input of the third An additional element And connected to the first input of the shift register, the output of the decoder of the information word group marker is connected to the first input of the fourth optional I element connected to the first input of the third additional trigger and the first input of the fourth additional trigger connected by the output to the first input of the fourth element NAND, the output of the first pulse generator connected to the second input of the third additional trigger connected to the output of the second input four The second additional element And, the second output of the recording unit is connected to the first input of the command off delay unit connected by the second input of the command off delay unit connected to the control panel by the second input and to the input of the additional OR element connected by the second input to the second input control unit connected by the output to the first input of the third element AND-NOT and to the input of the second element NOT connected by the output to the second input of the first element AND-NOT connected by the third input to the transform the code recipient connected to the input of the memory unit and the first input of the time error correction block connected by the output to the first input of the fifth additional element 94 and AND, the output of which is connected to the input of the first additional element AND, with the second input of the recording unit, with the second the input of the third additional element And with the input of the third element NOT connected with the output to the second input of the counter, the output of which is connected to the second inputs of the time error correction block, shift register, the second additional element And and The third and fourth elements are NAND, and the output of the second pulse generator is connected to the first input of the OR element connected by an output to the second inputs of the first and second additional triggers and connected by a second input to the output of the third pulse shaper connected to the second input of the fourth additional trigger and with the third input of the command delay unit, the output of which is connected to the fourth input of the first NAND element, to the second input of the fifth additional Nick element, the third input of the block pisi The drawing shows one of the possible variants of the proposed device. The device contains a record-play buffer unit 1 connected to input buses 2 and inputs of converter 3 of the code, the outputs of which are connected to memory block 4, such as the memory register, and the measure element OR 5. At the same time, the OR 5 element is connected to the first input trigger 6, connected to the output of the first input element And 7. The proposed device also contains a special group of information word marker connected by inputs to the outputs of the converter And 7, the first element AND-NOT 9 and the first additional trigger 10. The first element AND-NOT 9 is connected by the first input to the first output of the recording unit 11 connected to the output buses 12, and connected to the second input of the trigger 6 by the output. The first additional trigger 10 is connected by the first input to the output of the And 7 element and connected to the first input of the counter 13. . In addition, the device contains connected in series shift register 14, the second element AND-NOT 15 and the first additional element And 16,

510

connected between the outputs of the block 4 and the first input of the block AND of the record, connected in series by the control unit 17, the first element NOT 8 and the first driver 19 pulses, connected in series the third element IS-NOT 20 and the second driver 21 pulses and connected in series the fourth element AND -NOT 22 and the third driver 23 pulses. The output of the first additional trigger 0 is connected to the first input of the second additional element AND 24 connected by a code to the first input of the second additional trigger 25, the output of which is connected to the input of the second element NAND 15. The output of the second additional trigger 25 is also connected to the first third input additional element And 26, the connected output with the first input of the register 14 shift /

In the proposed device, the output of the decoder 8 of the information word group marker is connected to the first input of the fourth additional element AND 2 / connected to the output of the third additional trigger 28 and to the first input of the fourth additional trigger 29 connected to the first input of the fourth element AND IS NOT 22 The output of the first driver IC pulses connected to the second input of the third additional trigger 18, connected by an output to the second input of the fourth additional element And 27.

The device also has a second output.

the recording unit 11 is connected to the first input of the command delay unit 30 of the command connected by the second input to the control panel 17 and to the first input of the additional element OR 31. The additional element -YI 31 is connected by the second input to the recording-playback unit 1 and connected to the output to the first input the third element AND-NOT 20 and the input of the second element is NOT 32, connected to the output of the second input of the first element AND-NOT

9. The third input of the first AND-9 element is connected to a converter 3 of the code connected to the input of memory block A and to the first input of time error correction block 33 connected by an output to the first input of the fifth additional element Pi 34. The output of the fifth additional element

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And 34 is connected to the input of the first additional element I 16, with the second input of the recording unit 11, with the second input of the third additional element And 26 and with the input of the third element HE 35 connected by the output to the second input of the counter 13. The output of the counter 13 is connected to the second inputs of the unit 33 correction of temporary errors, shift register 14, the second additional element AND 24 and the third and fourth elements AND-NOT 20 and 22.

In the proposed device, in addition, the output of the second pulse driver 21 is connected to the first input of the element OR 5 connected by an output to the second inputs of the first and second additional triggers 10 and 25 and connected by a second input to the output of the third driver 23 pulses. The output of the third pulse driver 23 is connected to the second input of the fourth additional trigger 29 and to the third input of the command deactivation block 30, the output of which is connected to the fourth input of the first AND-9 element, to the second input of the fifth additional element 34 and to the third input of the block 11 records

Magnetic recording of digital information is as follows.

The recording-reproducing unit 1 produces an uninterrupted magnetic recording and playout with a delay of codes of sequences of information word groups arriving on the input buses 2, and the recording unit 11, in accordance with the command sent from the control panel 17 through the command off-delay unit 30, overwrites only selected arrays of information from the result of reproduction by recording-reproducing unit 1.

The circuit from converter 3 of code, block 4 of memory, register 14 of the shift of the second element AND – NOT B and the first additional element AND 16, as well as from block 33 for the correction of temporal distortions, the fifth additional element And 34, the third element HE 35 and counter 13 provides a reduction in temporal distortions of sequences of groups of information words when rewriting from block 1 of the recording and playback to block 1: and. 7 10 A chain from an additional element OR 31, the second element NK 32 of the first element NAND 9, trigger b, element 7, the first additional trigger 10, the second additional element 24, the second additional trigger 25 and the third additional element 26 implements the algorithm work during the start of the rewriting on the recording unit II from the recording-reproduction unit 1. The circuit from the first element HE 18, the first driver for the pulses, the third additional trigger 28 of the fourth additional element AND 27, the fourth additional trigger 29, the fourth additional element And 22 and the third Lorimeter 23 pulse implements the algorithm of operation during switching off re-recording. from recording-play unit 1. The circuit from the third element AND-NOT 20 of the second driver 21 pulses W and the element OR 5 b provides control over the rewriting when reversing the recording-playback unit 1 or the recording-AND block, recording is performed in the recording unit 1I during the rewriting ballast signal as a sequence of logical units before the first group of information words of a selected array of information and after its last group of information words. Such a recording of the ballast signal makes it possible to avoid abrupt changes in the recording density at the boundaries of the selected array of information. The latter provides the possibility of error-free reproduction of the first and last groups of information words of a selected array of information on block 11 of the record. The use of the invention allows to significantly reduce the error of magnetic recording of digital information.

Claims (1)

DEVICE FOR MAGNETIC RECORDING OF DIGITAL INFORMATION, which contains a recording-playback unit connected to the inputs of a code converter, the outputs of which are connected to a memory unit, an OR element connected by an output to the first input of a trigger connected by an output to the first input of an AND element, a recording unit and a counter, distinguishes The fact is that, in order to reduce the error in the magnetic recording of digital information, a decoder, a kera of a group of information words, connected to the outputs of the code converter and connected to going to the second input of the AND element, the first AND-NOT element connected by the first input to the first output of the recording unit and connected by the output to the second input of the trigger, the first additional trigger connected by the first input to the output of the And element and connected to the output to the first input counter ,. the shift register connected in series, the second AND-NOT element and the first additional AND element, connected between the outputs of the memory unit and the first input of the recording unit, connected in series to the control panel, the first element. and a second pulse shaper, a fourth AND-NOT element and a third pulse shaper included, a command off delay unit, a temporary error correction block, an additional OR element, a second, the fourth, fifth and fifth additional elements AND, the second and third elements NOT and the second, third and fourth additional triggers, and the output of the first additional trigger is connected to the first input of the second additional trigger, the output of which is connected to the input of the second AND-NOT element and to the first input of the third additional element And connected to the first input of the shift register, the output of the decoder marker of the group of information words is connected to the first input of the fourth additional element And connected to the output th to the first input of the third flip-flop and an additional. the first input of the fourth additional trigger connected by the output to the first input of the fourth AND element, the output of the first pulse shaper is connected to the second input of the third additional trigger connected by the output to the second input of the fourth additional element AND, the second output of the recording unit is connected to the first input of the off delay unit command connected by the second input to the control panel, and with the first input of an additional OR element, connected by the second input to the recording unit-sosU. "1092559 and connected by the output to the first input of the third INE element and to the input of the second element NOT connected to the second input of the first AND AND NOT connected by the third input to the code converter connected to the input of the memory unit and to the first input of the temporary error correction unit connected an output to the first input of the fifth additional element And, the output of which is connected to the input of the first additional element And, with the second input of the recording unit, with the second input of the third additional element And and with the input a network element NOT connected to the second input of the counter, the output of which is connected to the second inputs of the time error correction block, the shift register, the second additional AND element, and the third and fourth AND-NOT elements. and the output of the second pulse shaper is connected to the first input of the OR element, connected to the second inputs of the first and second additional triggers and connected to the second input to the output of the third pulse shaper, connected to the second input of the fourth additional trigger and to the third input of the off-delay unit, the output of which is connected to the fourth input of the first AND-NOT element, to the second input of the fifth additional AND element and to the third input of the recording unit.