SU723672A1 - Device for marking and retrieval information on magnetic tape - Google Patents

Description

one

The invention relates to a magnetic recording technique and can be used in a system for editing sound and video films, as well as in training systems.

A device for marking and searching a record on a magnetic tape, comprising magnetic recording and reproducing heads, logic elements, an indication unit, a counter and a master oscillator l, M is stored in them by recording the copied signal on a magnetic tape and then playing it back. information.

A disadvantage of this device is the complexity of the circuitry.

It is also known a device for marking and searching information on a magnetic tape, comprising a magnetic recording head connected through a recording amplifier to a code-giving unit, a magnetic playback head connected through a playback amplifier to an immersion counter, as well as a separate T-generator, a 1T coincidence unit and a unit control over the h1prot g1 rm by mechanism 2J,

A disadvantage of this device is the impossibility of retrieving the necessary information when rewinding a magnetic tape.

Nel of the invention is obesity (search for information during reverse tamping of a magnetic tape.

Claims (2)

This is achieved in that a device containing a magnetic head, connected through a recording amplifier with a code block, a magnetic playback head, and connected 1 through a playback amplifier to a pulse counter, as well as a separate generator, a coincidence unit, and a control unit of a tape mechanism, serially connected shaper of the duration of the code signal and the enabling unit, each included the first output of the coadjusting unit and the input of the amplifier ppsi, while the second step is allowed cof, nHHOi (with r eitcpa37 torus) and, in the output, the codecoder output is connected to the first input of the coincidence element, connected by the second input and output, respectively, between the output of the pulse counter and the input of the control unit of the tape drive mechanism. The device contains a magnetic tape 1, a magnetic recording head 2, a recording medium 3, an enabling unit, a sinusoidal signal generator 5, a shaper of the duration of the code signal, a code-generating unit 7, a magnetic reproducing head from BoDy 8, Playback Stretch 9, Pulse Counter Yu, Coincident Element 11, Switches 12, Auxiliary Pulse Counter 13, Block 14 Control the npOTsDKiQiiM mechanism. . Magnetic head 2 is connected to the output of the recording amplifier 3, to the input of which the resolving unit 4 is connected. To the two inputs of its power supply, blocks 5 and 6, the dosing unit 7 is a device, on the front panel of which the keys are: etc. When you click this or. other junction to the shaper 6 of the length of the coding wave signal, when marking, the corresponding time specifying circuits are connected, and when searching for information, the matching element 11 matches the corresponding signals of units, tens, etc. Magnetic head 8 is connected to the input of the amplification amplifier 9, the output of which is connected to the input of pulse counter 10, and the output of the latter to one of the inputs of the complex ten-fold element coincident 11 and through switch 12 to the input of the auxiliary pulse counter 13. Output of the coincidence circuit 11 connected to the input of the block 14 of the control of the tape mechanism. The output of block 4 through the switch 12 is connected to the input of the pulse counter 13. In the marking process in block 7, dial the required code. Allowing unit 4 transmits a certain number of sinusoidal pulses from generator 5. These pulses are recorded by recording amplifier 3 and magnetic head 2 onto magnetic tape 1, and also through switch 12 are fed to the input of pulse counter 13, where the dialed code is displayed on its indicator. Since these pulses are sinusoidal, they are recorded and reproduced without distortion at any speed of movement of the magnetic tape, both in the forward direction and in the opposite direction. In the process of searching for information, the code is dialed in block 7, and the 1 passes the magnetic head 8, the playback amplifier 9 and the pulse counter 10, is fed to one input of the matching element 11 and through the switch 12 to the input of the pulse counter 13. An information code is displayed on its indicator. When passing the desired section on the tape, the coincidence element generates a control signal for the tape mechanism. When rewinding the tape, the counter is set to reverse mode so that the counting of the code pulses always starts from a smaller number to a larger one. Claims An apparatus for marking and searching information on a tape tape, comprising a magnetic recording head connected through a recording amplifier to a code-generating unit, a magnetic playback head connected through a playback amplifier to a pulse counter, and also an individual generator, a coincidence element and a tape control unit mechanism, characterized in that, in order to ensure information retrieval during rewinding of a magnetic tape, sequentially connected forms are introduced into the device The duration of the code signal and the permitting unit, including the PCIe. between the first output of the code-giving unit and the input of the recording amplifier, the second input of the permitting unit is connected to the generator, and the second output of the code-providing unit is connected to the first input of the coincidence element connected to the second input and output, respectively, between the output of the pulse counter and the input of the control unit of the tape mechanism . Sources of information taken into account in the examination 1, USSR Author's Certificate No. 346737, cl. Q 11 V 5/06, 21,08,70, 2. USSR Author's Certificate No. 458О32, class, Q 11 V 23/42, 24,12,73 (prototype).