SU902057A1 - Magnetic recording and reproducing device - Google Patents

Description

(54) DEVICE FOR MAGNET RECORDING AND REPRODUCTION

one

The invention relates to a magnetic recording technique, namely, to devices for recording and reproducing discrete data.

A magnetic recording device is known comprising a buffer storage unit, a magnetic storage unit and a control unit for the speed of movement of the carrier 1.

The disadvantage of this device is its complexity, due to the introduction of elements that provide a change in the speed of movement of the carrier, and elements that provide synchronization of the recorded signals in accordance with the speed of the carrier.

Closest to the present invention is a device comprising a buffer storage unit, a magnetic storage unit, a code conversion unit connected to the output of the buffer storage unit and recording heads and a magnetic storage unit, an input unit whose output is connected to the input of the buffer storage unit, and input — data length, first and second address counters, whose outputs are connected to a buffer memory unit, and a control unit, connected to a magnetic storage unit, code conversion unit, input unit, to an input

the first and with the entrance of the second counter address 2.

A disadvantage of the known device is the low reliability and efficiency due to the large volume of buffer memory.

The purpose of the invention is to increase reliability and reduce the volume of the buffer memory.

The goal is achieved by the fact that the device is equipped with a pulse train generator, a pulse distributor, a third address counter and two zone counters, the input of the pulse series generator is connected to the control unit, the output of the pulse series generator is connected to the pulse distributor input, the first pulse distributor stroke is connected to the input of the third address counter and the input of the first zone counter, the output of which is connected to a magnetic drive, the output of the third address counter is connected to the input of the unit ernoy memory input of the second zone of the counter is connected to address input of the first counter, the second zone of the counter output is connected to the input of the converter block codes, and the last output connected to the input of the input unit.

The drawing shows a block diagram of the device.

The device contains a data bus 1 connected to an input block 2, a buffer memory block 3, a code conversion block 4, the output of which is connected to the recording and reproducing heads 5 of the magnetic drive 6. The device also contains lock 7, the first counter 8 addresses and the second counter 9 addresses. The device is equipped with a generator of 10 series of pulses, a distributor of 11 pulses, a third counter of 12 addresses, a first counter of zone 13 and a second counter of zone 14.

The device works as follows.

The input information to be written to the accumulator 6 is transmitted from the data band I to the input unit 2. The tracking data signal from the strip 15 through the control block 7 starts the generator 10, at the output of which a series of three pulses are formed, which are distributed by the distributor 11. The signal from the output 16 of the distributor 11 increases the state of the counters 12 and 13 by one, and the counter 12 is connected to the input unit 3 buffer memory. Connecting any address counter to the input of block 3 results in the output of block 3 of the buffer memory at the output of block 3, whose address is determined by the address counter. By the signal of block 7, data from busses 1 is transferred through block 2 of input and fed to block 3 of the buffer memory in the cell with the address determined by the state of counter 12. The following information words are entered into block 3 in the same way, successively filling its memory cells. When the number of information words accumulated in block 3 becomes equal to the array of one recording zone, a turn-on signal is sent from the output of counter 1 to drive 6, and the counter 13 is set to the zero state. Upon reaching the nominal carrier speed in the accumulator 6 from the buffer storage unit 3, the accumulated information in the order of addresses of the counter 12 is transferred to the accumulator 6 through the code conversion unit. The signal recorded on the carrier is reproduced and fed to unit 4, at the output of which sync pulses are generated. The sync pulses through control block 7 are fed into counter 9, according to the state of which the reproduced signal is inputted into the corresponding memory cell of block 3.

After removing the information array from block 3, the counter 14 is set to the zero state, and in block 11, control words are written to be recorded on the carrier at the end of each zone. After playing the last word of the zone, the medium in the drive 6 stops.

The reproduced information is output from block 3 to register 17 and further to external devices, and the empty cells of block 3 of the buffer memory are filled with newly received information. The application of the invention allows to reduce the amount of buffer memory and increase the reliability of the device.

Claims (2)

Invention Formula A magnetic recording and playback device containing a buffer storage unit, a magnetic storage unit, a code conversion unit connected to the output of the buffer storage unit and recording and playback heads of a magnetic storage unit, an input unit whose output is connected to the input of the buffer storage unit, and input Data Warehouse, the first and second address counters, the outputs of which are connected to the buffer memory unit, and the control unit connected to the magnetic storage unit, code conversion unit, input unit, to the input of the first and to the second input second address counters, characterized in that, in order to increase reliability and reduce the volume of buffer memory, it is provided with a series of pulse generator, the pulse distributor, the third counter address counters and two zones, the generator pulse series input is connected to the control unit, the output the pulse train generator is connected to the input of the pulse distributor, the first output of the pulse distributor is connected to the input of the third address counter and to the input of the first zone counter, the output of which is connected to the magnetic drive, the output 0 of the third address counter is connected to the input of the buffer memory block, the input of the second zone counter is connected to the input of the first address counter, the output of the second zone counter is connected to the input of the code converter, and the output of the last one is connected to the input of the input block. Sources of information taken into account in the examination 1. US patent number 3967316, cl. 360-51, published. 1976. 2. USSR author's certificate No. 491980, cl. G 11 5/02, 1974 (prototype).