SU1554013A1 - Device for magnetic recording and reproduction of speech signals - Google Patents

Abstract

The invention relates to the accumulation of information and can be used for magnetic recording-reproduction of speech signals. The purpose of the invention is to increase the intelligibility of speech when reproducing speech signals in the reversing mode. The device contains the first and second operative dynamic memory elements connected in series between the delta encoder and the delta decoder. When a tape is directly moved, the digital code from the delta encoder passes to the delta decoder through the first element of the dynamic memory. When reserving a magnetic tape movement, the digital code from the delta decoder passes to the delta decoder through the first and second elements of the dynamic memory memory. Due to this, the second element of the dynamic memory memory delays the digital code by an interval of time exceeding the time required for relocating the magnetic tape. 1 il.

Description

The invention relates to the accumulation of information, namely, devices for magnetic recording-reproduction of speech signals.

The purpose of the invention is to increase the intelligibility of speech when reproducing speech signals in the reversing mode,

The drawing shows one of the possible variants of the proposed device.

The device comprises a universal magnetic head 1 connected to the first output of the erase and biasing generator 2 and to the first switch 3 connected to the output of recording amplifier k and to the input of playback amplifier 5 connected by output to output bus 6, displacement current conditioner 7 connected by output with an electric motor 8 of the tape mechanism 9, element 10, the first 11 and second 12 triggers, the second switch 13, the differentiating element Ik, erasing the magnetic head 15, the driver 16 clock pulses owl delta coder 17, block 18 for fixing a digital speech code, delta decoder 19, first 20, second 21 and third 22 counters, first 23 and second 2k elements OR, and multiplexer 25. Shaper 7 current speeds are connected by the first input to the first bus 26 peres

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switching on the mode and connected by the second input to the output of the AND 10 element connected by the first input to the direct output of the first trigger 11 and connected by the second input to the second mode switching bus 27 connected to the input of the differentiating element k with the control input of the first switch 3 and with the control input of the erase and drive generator 2, In this case, the first 26 and second 27 mode switching buses are connected to the outputs of the mode switching unit 28. The erase and drive secondary generator 2 is connected to the erase magnetic head 15 by a second output and 16 clock pulses to the input of the generator, the output of which is connected to the control input of the delta encoder 1-7. The delta encoder 17 is connected by an output to an input of a digital speech code fixing unit 18 and is connected by an information input to an input bus 29 of information connected to the first input of the second switch 13. The second switch 13 is connected to the output of the delta decoder 19 by a second input and is connected to control input the output of the second trigger 12. The second trigger 12 is connected by the installation input unit to the output of the first counter 20 and connected by the installation input zero to the output of the first element OR 23 connected to the installation input zero of the first trigger 11. The first t Igger 11 is connected by an inverse output to the first input of the second element OR 2 and connected by a unit installation input to the output of a digital speech code fixing unit 18 connected to the second input of the second element OR 2k connected to the zero input of the first counter 20, and to the input setting the zero of the second counter 21. The output of the second counter 21 is connected to the first input of the first element OR 23 connected by the second input to the output of the differentiating element 1kt. The third counter 22 is connected by outputs to the information inputs m ultiplexer 25

The device also contains the first 30 and second 31 elements of dynamic dynamic memory connected by address inputs to the outputs of the multiplexer 25, the third switch 32 connected by the output to the input of the delta decoder 19 the fourth switch 33 connected by inputs to the outputs

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the delta decoder 19 and the second switch 13 and connected to the output of the recording amplifier, the third element OR 3, the control driver 35 and the third trigger 36, the Third element OR 3 is connected by inputs to the outputs of the first element OR 23 and the first counter 20. a control puller 35 is connected by a first output to a control input of a multiplexer 25 and is connected by an input to an output of a clock 16 clock connected to the counting inputs of the first 20, second 21 and third 22 counters. The third trigger 36 is connected the output to the control inputs of the third 32 and fourth 33 switches.

The output of the delta color 17 is connected to the information input of the first dynamic memory element 30, connected with the fixing inputs of the column address, fixing the row address and recording resolution, respectively, to the second, third and fourth outputs of the control puller 35, respectively, connected to the fixing inputs of the column address , fixing the row address and recording resolution of the second dynamic memory element 31. The second dynamic memory element 31 is connected by an output to the first input of the third switch 32 and is connected by an information input to the output of the first dynamic memory element 30 connected to the second input of the third switch 32.

The universal magnetic head 1 and the erasing magnetic head 15 are mounted to mate with a magnetic tape 37 placed on a tape drive mechanism 9. On a tape drive mechanism 9, a sensor 38 of the flow rate of magnetic tape 37 is installed, the output of which is connected to the installation input of the unit of the third trigger 36 connected input setting zero to the output of the third element OR S1. i

The device works as follows.

When setting the recording mode from the mode switching unit 28 via the mode switching bus 27 to the control inputs of the first switch 3 and the generator 2 erasing and biasing

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a logical signal is received, as a result of which the output of the recording amplifier k is connected to the universal magnetic head 1, and the erasing and biasing generator 2 is transferred to the mode of generating erasing and biasing currents, respectively, fed to the erasing magnetic head 15 and to the universal magnetic head 1. In this case element 10 is set to the state of transmission of logical signals from the first trigger 11 to the displacement current current generator 7, and differentiating element 1 generates a short-term pulse, through the first element OR 23 to enter the zero setting of the first 11 and second 12 triggers, and through the third element OR 3 to the input of the zero setting of the third trigger 36, as a result of which the output of the first dynamic memory element 30 is connected via the third switch 32 to the delta input decoder 19, the output of delta decoder 19 is connected via the second 13 and fourth 33 switches to the input of amplifier k, and the first flip-flop 11 through element 10 acts on the displacement current conditioner 7, which removes the voltage engine 8 of the tape drive mechanism 9.

The shaper 16 clock pulses due to the action of the erase and biasing generator 2 generates clock pulses arriving at shaper 35 of control pulses at the multiplexer 25, at the third counter 22 and at the delta decoder 17. At the same time, the logic signals arrive at the address inputs and to the inputs of fixing the address of the column, fixing the address of the washing and recording resolution of the first 30 and second 31 elements of the dynamic memory. I

When a speech signal

On the input bus 29, the delta encoder 17 generates a digital code fed to the first dynamic memory element 30 and to the digital speech code fixing unit 18 The digital speech code fixing unit 18 resets the second counter 21 and changes the state of the first trigger 11, which through element And 10 acts on the former 7

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the displacement of the movement, supplying voltage to the motor 8 of the tape drive mechanism 9. This begins the movement of the magnetic tape 37 relative to the universal magnetic head 1 and the erasing magnetic head 1 5.

The digital code from the delta encoder 17 fills the first 30 and second 31 elements of the dynamic dynamic memory, operating in read-modify-write mode. The first dynamic memory element 30 through the third switch 32 acts on the delta decoder 19, which generates a speech signal coming through the second 13 and fourth 33 switches to the recording amplifier k. The recording amplifier 4 generates a recording current supplied through the first switch 3 to the universal magnetic head 1, which provides the corresponding magnetization of the magnetic tape 37. In this case, the speech signal is recorded on the magnetic tape 37 with a delay, taking into account the inertia of the tape mechanism 9.

At the end of the magnetic tape 3 / during its movement in the forward direction, the sensor 38 of the flow rate of the magnetic tape 37 triggers. It generates a short pulse that flips the third trigger 36. The latter causes the digital code to enter the delta decoder 19 through the third switch 32 from the output of the second dynamic memory element 31, and from the output of the delta decoder 19, the speech signal is fed to the recording amplifier k only through the fourth switch 33. In this case, the recording amplifier k generates a recording current extending through the first switch 3 to a universal magnetic head 1, which provides a speech signal recording on the magnetic tape 37 with twice the delay taking into account the time required for reverb-financing.

When a pause appears in a speech signal, the duration of which is more than one specified time interval and less than another specified time interval, the first counter 20, through the third element OR 3, resets the third trigger Zb (which translates the third 32 and fourth 33 switches E to the state that existed before reversing In this case, the first 30 and second 31 elements of the dynamic dynamic memory are freed from the digital code of the speech signal, which ensures that there is no danger of loss of voice information.

In the playback mode, the mode switching unit 28 on the first mode switching bus 26 acts on the displacement speed current driver 7, driving the motor 8 of the tape-testing mechanism 9. On the second mode switching bus, the mode switching unit 28 turns off the erase and sub generator magnetizing and transferring the first switch 3 to a state in which the universal magnetic head 1 is connected to the input of the amplifier 5 of the dual product. Here, the p-signal recorded on the magnetic tape 37i is reproduced by the universal magnetic head 1 and is fed through the reproduction amplifier 5 to the output bus 6.

Claims (1)

Invention Formula A device for magnetic recording and reproduction of speech signals, containing a universal magnetic head connected to the first output of the erase and biasing generator and to the first switch connected to the output of the recording amplifier and to the input of the playback amplifier connected to the output bus, driver the current of the travel speed connected by the first input to the first mode switching bus and connected by the second input to the output of the element I connected by the first input to the direct output of the first tr ggera and connected to the second input a second mode switching bus connected to the input of the differentiating element, with a control input of the first switch and with a control input of an erase and biasing generator; the second output of which is connected to an erase magnetic head and to the input of a clock generator, which is connected to the control input of the delta encoder which is connected by the output to the input of the block of fixing the digital code of speech and is connected by an information input to the input bus of information connected to the first 0 5 0 Q five the input of the second switch connected by the second input to the output of the delta decoder and connected by a control input to the output of the second trigger, which is connected by the installation input unit to the output of the first counter and connected by the installation input zero to the output of the first element OR, connected to the installation input zero of the first trigger, which is connected by an inverse output to the first input of the second element OR and is connected by the installation input unit to the output of the fixing unit of the digital speech code connected to the second input by the second element the OR input connected to the zero input input of the first counter and the zero input input of the second counter whose output is connected to the first input of the first OR element connected by the second input to the output of the differentiating element, and the third counter connected to the information inputs of the multiplexer, different that, in order to increase the intelligibility of speech when playing back speech signals in the reversing mode, the first and second elements of the dynamic memory memory are inserted into it, connected by third inputs connected to the output of the delta decoder, fourth switch connected to the outputs of the delta decoder and the second switch and connected to the input of the recording amplifier, third OR element connected to the outputs of the first OR element and the first counter, the driver of the control pulses connected by the first output to the control input of the multiplexer and connected by the input to the output of the driver of the clock pulses connected to the counter the first, second and third counters, the third trigger connected by the output to the control inputs of the third and fourth switches, and the magnetic tape flow sensor, the output of the delta encoder connected to the information input of the first element of the dynamic dynamic memory connected by the address fixing inputs of the column , fixing the row address and recording resolution, respectively, to the second, third, and fourth outputs of the driver of control pulses, connected respectively to the inputs of fixing the address table blocking the address of the line and recording the second element of the dynamic memory, connected by the output to the first input of the third switch and connected by the information input to the output of the first element of the dynamic dynamic memory connected to the second input of the third switch, and the output of the magnetic tape output sensor is connected to the installation input of the unit of the third trigger, connected by the installation input zero to the output of the third element OR. Editor A.Revin Compiled by I. Rosenkrantz Tehred M. KhodanychKorrektor I.Musk Order 459 Circulation 489 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR N3035, Moscow, Zh-35, - 4/5 Raushsk nab. Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Subscription