SU1515200A2 - Device for automatic search for record area on magnetic tape - Google Patents

Abstract

The invention relates to the field of accumulation of information, namely, devices for automatically searching for a recording area on a magnetic tape, and allows expanding the functionality of the device by allowing multiple searches for the same recording sections on a magnetic tape. After listening to the next piece of music or analyzing the next section of the pulse stream, a certain number of pulses will be accumulated in the third counter 24, and in the second counter there will be a 25-time interval between the last pulse of the analyzed sample and the point defining the end of the sample. If it is necessary to re-listen to a piece of music, on the control panel 28, the lock keys 34 and 38 are respectively set to position "2". At the same time, information from the first register 30 through the first multiplexer 32 enters the shift register, and from the second register 31 via the second multiplexer 33 - into the interval search block 12. 3 il.

Description

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The invention relates to the accumulation of information, namely, devices for automatically searching for a recording area on a magnetic tape.

The aim of the invention is to expand the functionality of the device by allowing multiple searches for the same recording areas on a magnetic tape.

Fig. 1 is a block diagram of the proposed device for automatically searching for a recording area on a magnetic tape; FIG. 2 shows a block diagram of a programmer; FIG. 3 shows timing diagrams of operation of the control unit by the tape-driving mechanism,

The device contains a tape drive mechanism 1, a magnetic head 2 connected to the recording amplifier 3, the main and additional magnetic heads 4 and 5 are connected, respectively, to the first and third inputs of the switch 6, the output of which is connected to the amplifier 7 with a variable factor gain The output of the amplifier 7 with varying gain is in turn connected to the pulse shaper 8, and the latter's output is connected to the first inputs of the first circuit AND 9, the shift register 10 and the programmer 11, the output of circuit AND 9 is the output of the device, and its output the second input is connected to the second input of the proprammator 11 and the code of the interval search block 12

The third inputs of the programmer 11 and the interval search block 12 are connected to the output of the time stamp generator 13, and the outputs of the programmer 11 are connected respectively to the second input of the shift register 10 and the second input of the interval search block 12, the first input of which is connected to the switch code 10 and the second inputs of the switch 6, the amplifier 7, the driver 8 and the control unit 14 of the tape-driving mechanism associated with the tape-driving mechanism 1, and the output of the shift register 10 through the input of the first inverter 15, which is the first input of the block 12 ka interval

the second input of the second circuit AND 16 connected to the second input of the third circuit AND 17, and the first input of the second circuit AND 16 is the third input of the interval search block 12, through the input

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 The first counter 18, nepHt.iH, the input of the comparison circuit 1.9, the second input of which is the second input of the interval search block 12, is connected in series with the second input of the programmer 11 via the first input of the third circuit 17.

The programmer 11 comprises a second inverter 20, the input of which, being the first input of the programmer 11, is connected to the first inputs of the sixth and seventh circuits And 21 and 22, and the output is connected to the second input of the fourth And 23 circuit, the first input of which is the third input of the programmer 11 and its third input is connected to the second inputs of the sixth, seventh circuits And 21 and 22 and with the output of the ninth circuit And 29, the first input of which is the second input of the programmer 11. The outputs of the fourth and seventh circuits And 23 and 21 are connected respectively to the inputs + 1 second and third counters 25 and 24, R the input of the second counter 25 is the output of the sixth And 22 circuit, and the outputs of the third and second counters 24 and 25 are connected respectively to the first inputs of the eighth and fifth And 26 and 27 circuits, the second inputs are connected to the search control key 37 of the control panel 28, and the outputs are, respectively, the inputs of the first and second registers 30 and 31, as well as the first data inputs of the first and second multiplexers 32 and 33, respectively. The second data inputs of the first and second multiplexers 32 and

33 are connected to the outputs of the first and second registers 30 and 31, respectively, their third address inputs are connected to the key 38 of the address of the control panel 28, and the outputs are respectively the second inputs of the shift register 10 and the interval search block 12. the second input of the nine circuit And 29. The keys 35, - 35 records the code of the number of pulses and the keys 361 - 36 records the code of the duration of the interpulse interval are connected

with the installation D-inputs of the third and second counters 24 and 25, respectively. Positions 1 and 2 keys

34 lock keys 35 - 35 write code of the number of pulses of keys 36 - 36 write code duration interpulse interval key 37 search

and key 38 addresses are associated with 1

with a bus of a logical unit and with a bus of logical zero.

The device works as follows.

In the initial state, the key 24 of the lock and the key 38 of the address of the control panel 28 are in position 1, and the search key 37 is in position 2. The device operates in two modes: Run1 and Rewind. In the first mode, from the interval search block 12 enters the programmer 11 a count enable signal, allowing the programmer 11 to count the number of pulses in the third counter 24 and the intervals between pulses in the second counter 25. After a certain counter in the third counter 24, a certain number will be accumulated pulses, and in the second counter 25, the time interval between the last pulse of the sample being analyzed and the point K defining the end of the sample (analysis). Upon the return of the magnetic carrier B by the tape-proof mechanism 1 to the position of the beginning of the tape, it is possible to perform a search. With this, the search key 37, which is set to position 1, receives a search signal. The contents of the second counter 25 nocTjTiaeT in the second register 31 and through the second multiplexer 33 are entered into the interval search block 12, and the contents of the third counter 24 in the unitary code are entered into the first register 30 and through the first multiplexer 32 into the shift register 10. The device is switched to the Rewind mode An additional magnetic head 5 is fed to the tape, while the main 4 is retracted. The information from the output of the imaging unit 8 is fed to the first input of the shift register 10 (the input of the shift control to the right). The signal in Bvvie logical zero at the output from: the motor register 10 is a signal for switching the device to the Run mode with the help of a block 14 controlling a tape-drive mechanism. At the same time, the same signal enables the block 12 to search for intervals. In block 12 of the interval search, the time stamps are counted in the first counter 18, and when comparing the time interval with the previously accumulated seconds of the counter 25, a Light Resolution signal is output to the programmer

and the same signal is 06

With the read enable signal in the PIO (information processing system), i.e. signal to complete the search for the desired point. Search key 37 returns to position 2.

After listening to the next piece of music or analyzing the next segment of the pulse

In the third counter 24, a certain number of pulses will be accumulated, and in the second counter 25 - a time interval. The interval between the last pulse of the analyzed assembly and the point defining the end of the sample. If you need to re-listen to a piece of music or analysis of a section of the pulse stream, then key: The lock keys 34 and addresses 38 are set to position 2. In this case, the Enable Enable signal from the interval search block 12 and the information from the first register 30 are blocked.

through the first multiplexer 32 enters the shift register 10, and the information from the second register 31 through the second multiplexer 33 into the interval search block 12; On in; 1 rotation of the magnetic carrier in the tape of the repetitive mechanism 1 to the position of the ribbon, regenerate the device. ; go to the Rewind mode and then again it searches for a point using the previously described algorithm of the device, except that the search key i7 is not transferred to position 1.

In the case when it is not necessary to rehear a fragment of a musical recording or analyze a section of a pulsed stream, but continue to listen to the next fragment of a musical recording or analysis of a section of a pulsed stream, not

it is necessary to install keys 34, 37 and 38 blocks on the remote control 26 ;; .); 1ki, search and addresses in position 1,

In addition, and implicitly from the C-tang magnetic tape recording section, then using the keys of the write code of the number of pulses 35, –35 ,, and the keys of the write of the code of the interpulse interval 36 by moving the corresponding recording keys from position 2 to position 1 you can set the second 25 and third 24 counters to the desired state and search for this section of the tape recording

Thus, when using the proposed device, the functionality of the known device is expanded, i.e. the device becomes more versatile, which allows the operator to save time in order to repeatedly search for a recording area on a magnetic tape.

Claims (1)

Invention Formula A device for automatic search of a recording area on a magnetic tape by author. No. 1185393, characterized in that, in order to expand the functionality, the programmer further comprises the first and second registers, the first and second multiplexers, the ninth AND circuit, and also a console, additionally containing a lock key and a key 50 addresses, the first inputs d.:, of the first and second multiplexers are connected to the output of the eighth AND circuit and the input of the first register and to the output of the fifth AND circuit and the second register input, respectively, their second data inputs are associated respectively with the first and the second registers, their address third inputs are connected to the address key, and the outputs are respectively the first and second outputs of the programmer, the search key and the lock key are connected respectively to the second inputs of the fifth, eighth and ninth And circuit, the first input of which is The second input of the programmer is connected to the third input of the fourth AND circuit, the pins of the first and second blocking keys and the search key are connected respectively to the buses of the logical unit and the logical zero. PRV vsp Compiled by S. Podorsky Editor Yu “Sereda Tekhred L. Oliynyk Proofreader M. Vasilyeva Order 6280/48 Circulation 558 VNSHSHI of the State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035 Subscription