JPS5938657B2 - Control method for magnetic recording tape - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording tape having a plurality of recording tracks of two or more, in which the same or different pieces of information are recorded on each track, and a control method thereof.

Conventionally, when attempting to select and reproduce specific information from a magnetic tape on which multiple pieces of information have been recorded, there have been two methods: mechanically detecting the position where the desired information is recorded using a tape counter; A blank area with no signal is provided between the information,
A method has been adopted in which fast forwarding or rewinding is detected using a magnetic head.

Among these methods, the former has disadvantages such as having to run the magnetic tape from the beginning, being prone to errors, and incompatibility of the equipment used, while the latter Although it is easy to detect the previous or next blank area, there is a drawback that the control circuit becomes complex and expensive when attempting to detect two or more preceding and following blank areas. The object of the present invention is to provide a magnetic recording tape and a control method thereof that do not have the above-mentioned drawbacks. This magnetic recording tape and its control method are extremely effective in cases such as .

The present invention has a plurality of recording tracks of two or more, each track has a plurality of pieces of the same or different pieces of information recorded therein, and a blank non-signal part or a communication signal part is provided between each piece of piece of information. The magnetic recording tape has a magnetic recording tape in which the positions of the non-signal part and the contact signal part on the recording track are made to correspond to each other for each track, and a plurality of magnetic heads detect the non-signal part and stop the magnetic tape from running. This is a magnetic recording tape control method characterized by controlling the operation of equipment.

Embodiments of the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of the magnetic recording tape of the present invention, where 1 is a magnetic tape, 2 is a first track, and 3 is a second track. 4a to 4g are unit information recorded on the first track, and 5a to 5g are unit information recorded on the second track.

Reference numeral 6 denotes a blank no-signal section provided between each piece of information, and 7 is a communication signal section, which is formed of a chime tone, a single tone, music, or a signal mutually related to the preceding and succeeding unit information.

The positions of the no-signal section 6 and the communication signal section 7 on the first track and the second track correspond to each other, and the length thereof is about 2 to 5 seconds during reproduction. No signal part 6
The information recorded between the data and the non-signal portion 6 is independent information, and mutually related unit information is connected by the communication signal portion 7 to form one piece of information. Further, the information recorded on the first track and the second track may be the same or different. Figures 3 and 4 are similar to Figures 1 and 2.
This is a diagram showing an outline of a device for reproducing the magnetic tape shown in Figure 8.
9 corresponds to the first and second tracks, respectively.
and a second magnetic head, 10 and 11 are preamplifiers, 1
2 and 13 are track changeover switches, 14 is an input switch, 15 is a control circuit, 16 is a reset switch, 17 is an input terminal, and 18 is a ground terminal.

3 and 4, when the input switch 14 is closed and the changeover switch 12 or 13 is connected to the a contact point, only the first track 2 is played back by the first head 8, and then the changeover switch 12 or 13 is connected to the a contact point. When the switch 13 is connected to the B contact, only the second track 3 is reproduced by the second head 9. In FIG. 4, when the changeover switch 13 is connected to the C contact, the first and second magnetic heads 8, 9 Therefore, both the first track and the second track are played simultaneously. FIG. 5 shows a specific embodiment of the control circuit 15 shown in FIGS. 3 and 4. In FIG.

In the figure, 19 is a diode that rectifies the input, a capacitor 20 acts as an integrating circuit, transistors 22 and 23 having appropriate time constants are connected to a resistor 24,
Together with 25, 26, and 27, it constitutes a Schmitt trigger circuit. Reference numerals 28 and 29 represent an input resistance and a collector resistance of the transistor 30, and 31 represents a thyristor, the gate of which is connected to the collector of the transistor 30 via a capacitor 32 and a resistor 33.

34 is a display lamp or a light emitting diode, which is connected in series with the thyristor 31 via a resistor 35.

36 is a switching transistor whose base is resistor 3
The magnetic tape drive motor 38 is connected to the circuit of the thyristor 31 via a magnetic tape drive motor 7 in series.

39 is a power supply, and 40 is a power switch.

Next, the operation of the control circuit 15 will be explained with reference to FIG. A signal input to the input terminal 17 is half-wave rectified by a diode 19, smoothed by a capacitor 20, and applied to the base of a transistor 22 at the front stage of the Schmitt trigger circuit. Since the collector output of the transistor 23 in the latter stage of the Schmitt trigger circuit becomes a positive potential when the signal input increases,
When this is applied to the transistor 30, the collector potential of the transistor 30 decreases and the thyristor 31 is turned off.
Therefore, the base of the transistor 36 is supplied with a potential and becomes conductive, and the motor 38 rotates. When the signal input decreases (when the magnetic head detects the no-signal section 6), the opposite phenomenon occurs, a positive potential is generated at the collector of the transistor 30, and the thyristor 31 is turned on. Thyristor 31
As a result of the conduction, the lamp 34 lights up, and the base potential of the transistor 36 decreases, turning it off, and the motor 38 stops. It is assumed that the power switch 40 is closed and the reset switch 16 is open. In this way, the motor is controlled to stop when the signal input attenuates, so it can be started even if it starts from a no-signal area.
It operates only when a signal input is applied and then the first no-signal section is entered.

Even if the magnetic tape stops and the signal input disappears, the thyristor 31 remains on, so the stopped state is maintained. The lamp 34 indicates the stopped state. To release this state, it is sufficient to close the reset switch 16 and turn off the thyristor 31. The transistor 36 then becomes conductive and the motor 38 rotates. This control is also possible by opening and closing the anode circuit of the thyristor 31. That is, a normally open switch may be provided in the anode circuit of the thyristor 31, and the switch may be closed only during a rewind or fast forward operation in conjunction with the release of that operation. In this case, the input switch 14 becomes unnecessary.
Further, instead of directly controlling the motor 38, the magnetic tape running mechanism may be controlled by an electromagnetic solenoid or the like. The case where the magnetic tape shown in FIG. 1 is reproduced by the apparatus shown in FIG. 3 will be explained.

When the input switch 14 is closed and the changeover switch 12 is connected to the a contact, the first track 2 is reproduced by the first head 8. The first track has 4a, 4b, 4c...
Since there is a blank no-signal part 6 between the unit information of...
When the first head 8 detects this, the control circuit 15 acts to stop feeding the magnetic tape. That is, unit information 4
Since the magnetic tape is stopped each time a, 4b, 4c, . . . If you want to listen to the unit information you just listened to again, you can rewind it and the magnetic tape will stop at the no-signal section before that unit information, so you can switch rewind to playback and close the reset switch 16. Therefore, it is convenient if the reset switch 16 is automatically closed in conjunction with the end of the rewind or fast forward operation. In other words, these mechanisms, which are currently widely used as magnetic tape running mechanisms, lock the playback state and perform rewinding or fast forwarding when rewinding or fast forwarding is performed during playback. It is advantageous to employ a mechanism that immediately returns to the regenerating state when the operation is stopped. If you want to automatically stop only during fast forwarding or rewinding, close the input switch 14 in conjunction with the fast forwarding or rewinding operation, or control the power switch 40 instead of the input switch 14. It's okay. The second track 3 of the magnetic tape in FIG.
It is recorded with a no-signal section 6 between b-5c and 5d-5e-5f. Therefore, when this second track 3 is reproduced by the second head 9, the magnetic tape becomes a non-signal section 6.
5a-5b-5c and 5d-5
e-5f are each played back in succession. The longer the length of the non-signal section 6 and the contact signal section 7, the more reliable the operation, but if the length is too long, the listener will get tired of waiting, and if the length is too short, the operation of the control circuit 15 will be uncertain. As mentioned above, the time is set to about 2 to 5 seconds. Also, the signals 4a to 4g of the first track and the signals 5a to 5g of the second track are made to correspond to the same or similar information, and the changeover switch 12 is switched to the a contact or the b contact. This is to make it convenient for you to listen to the songs alternately. Second
The magnetic tape shown in the figure is a first track 2 in which a no-signal part 6 is inserted between signals 4a-4b, 4c-4d, and 4e-4f in which two pieces of unit information are connected by a communication signal part 7, and three pieces of unit information. The signals 5a-5b-5c, 5d- are connected by the communication signal section 7.
Second track 3 with no signal section 6 inserted between 5e and 5f
have.

Figure 4 shows a device suitable for playing this magnetic tape.
When the changeover switch 13 closes the A contact, the first head 8 reproduces the first track, and when the B contact closes, the second head 9 reproduces the second track, and the C contact When the 1st and 2nd
Both the first and second tracks are played simultaneously by the head. Therefore, in the case of the C contact, the magnetic tape stops only when the non-signal portions 6 of the first track and the second track coincide. The device shown in FIG. 4 can be used to record the magnetic tape shown in FIG. 1, and the device shown in FIG.
Needless to say, the magnetic tape shown in the figure can be played back. In this way, making it possible to reproduce information recorded on a magnetic tape by classifying it into small, medium and large categories is extremely effective in detecting specific information among a large amount of information. In the above embodiment, the magnetic tape has two tracks, but the number of tracks can be two or more, and the changeover switches 12 and 13 are also compatible with this. is designed to.

In this way, a large amount of information recorded on the magnetic tape can be appropriately classified and recorded, and the desired information can be easily detected by the magnetic head detecting the non-signal area and stopping the magnetic tape. can. It is desirable to search for this information quickly by fast forwarding or rewinding.
In learning magnetic tapes, it is often desired to repeatedly reproduce the tape at a normal playback speed, and the magnetic tape and its control method of the present invention are particularly effective in meeting these demands. As described above, the magnetic recording tape and its control method of the present invention can reliably select specific information from a large amount of information recorded on the magnetic tape, so its industrial value is extremely high. It's large.

[Brief explanation of drawings]

Figure 1: One embodiment of the magnetic recording tape of the present invention, Figure 2:
One embodiment of the magnetic recording tape of the present invention, FIG. 3: A block diagram of one embodiment of the reproducing apparatus used in the present invention, FIG. 4: A block diagram of one embodiment of the reproducing apparatus used in the present invention. , FIG. 5: An embodiment of the control circuit in FIGS. 3 and 4. 1... Magnetic tape, 2... First track, 3... Second track, 4, 5...
Unit information, 6... No signal part, 7... Contact signal part, 8... First head, 9...
2nd head, 10, 11... Preamplifier, 12
, 13... Changeover switch, 14... Input switch, 15... Control circuit, 16...
...Reset switch, 17...Input terminal, 1
8... Earth terminal.

Claims (1)

[Claims] 1. It has a plurality of recording tracks of two or more, each recording track records a plurality of pieces of unit information that are the same or different, and there is no blank space between each piece of unit information. What is claimed is: 1. A magnetic recording tape comprising a signal portion or a contact signal, and the positions of the non-signal portion and the contact signal portion on the recording track are made to correspond to each other for each recording track. 2. The magnetic recording tape according to claim 1, wherein the communication signal portion is formed of a chime tone, a single tone, music, or a continuation of unit information before and after it, or a signal related to unit information before and after it. . 3. The magnetic recording tape according to claim 1, wherein the unit information connected in the communication signal section is mutually related information. 4. The magnetic recording tape according to claim 1, wherein the positions of the non-signal portions provided in the plurality of recording tracks are provided at different positions for each recording track, and are made to coincide at a predetermined position as necessary. 5. It has two or more recording tracks, each recording track records a plurality of pieces of unit information that are the same or different, and there is a blank no-signal part or a contact signal part between each piece of unit information. and in which the positions of the non-signal area and the communication signal area on the recording track are made to correspond to each other for each recording track, and the plurality of recording tracks are reproduced to reproduce the blank non-signal area. A magnetic recording tape control method characterized by stopping the magnetic recording tape and controlling other equipment when a magnetic head detects the detection. 6. The magnetic recording tape control system according to claim 5, wherein only one of the plurality of recording tracks is reproduced and a device is controlled by the non-signal portion thereof. 7. Claim 5, characterized in that two or more of the plurality of recording tracks are simultaneously reproduced, and when the non-signal portions of these recording tracks coincide, the device is controlled. control method for magnetic recording tape. 8. The device may be controlled by selecting either detection of a non-signal portion of any one of the plurality of recording tracks or detection of coincidence of non-signal portions of a plurality of tracks. A control method for a magnetic recording tape according to claim 5.