JPH04254943A - Tape driving device - Google Patents

Abstract

PURPOSE:To secure interchangeability by calculating the speed of a tape and controlling a DRAW part to its running speed. CONSTITUTION:A controller 16 outputs a control signal (b) to a changeover switch 2, control signals (c), (d) to a reel motors 13 and 14 and a control signal (e) to a capstan motor 15 and controls them when an instruction signal (a) is inputted from an operation switch 17 in accordance with the operation modes of recording, reproducing, fast forwarding, rewinding, etc. When the selective terminal 2b of the switch 2 is turned ON and the information signal of a magnetic tape 20 reproduced at a magnetic head 1 is inputted, the timing is judged by the controller with its built-in calculation function, the speed of the tape is calculated at the information recording section of the tape and the revolution of the motor 15 is controlled so that the tape 20 is run at this speed. Thus, the change of the speed of a recording tape at before/after starting position of the DRAW recording is canceled and excellent interchangeability is attained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape drive device for controlling the running of a magnetic tape, which is a recording medium.

0002

2. Description of the Related Art A tape drive device such as a tape recorder that records/reproduces information signals on a magnetic tape serving as a recording medium, as shown in FIG. The magnetic tape 20 is guided into the running path by tape guides 9 and 10, and in this state, the capstan 11 with the magnetic tape 20 sandwiched between it and the pinch roller 12 is driven to rotate, so that the magnetic head with the magnetic tape 20 attached thereto is rotated. 1 records or reproduces information signals onto the magnetic tape 20. Incidentally, during the recording and reproducing operations as described above, the magnetic tape 20 is moved from the supply reel 20a supported on the supply reel stand 7 to the take-up reel stand 8.
The tape is wound onto the take-up reel 20b supported by the tape, and the tape is run in the A direction.

[0003] The above-mentioned tape drive device also includes a recording section consisting of a recording signal processing circuit 3 and a signal input terminal 4, a reproduction section consisting of a reproduction signal processing circuit 5 and a signal output terminal 6, and a magnetic head 1. A select terminal 2a of the select switch 2 is turned on during recording operation, and the select terminal 2a of the select switch 2 is turned on, making the recording section suitable for recording information signals on the magnetic tape 20. On the other hand, during the reproduction operation, the select terminal 2b of the changeover switch 2 is turned on to convert the information signal into a reproduction signal suitable for reproduction in the reproduction section.

[0004]Furthermore, the above-described tape drive device is provided with a controller 16' to control the running of the magnetic tape 20 according to operation modes such as recording, playback, fast forwarding, rewinding, etc. . This controller 1
6' is connected to the operation switch 17' and the input side of the reproduced signal processing circuit 5 on its input side, and on the output side is connected to the changeover switch 2 and the drive control of each reel stand 7 and 8. Each reel motor 13, 14 and capstan 11
A capstan motor 15 for driving and controlling is connected. Then, the controller 16' receives an instruction signal a corresponding to each operation mode from the operation switch 17', and sends a switch control signal b to the changeover switch 2, and a switch control signal b to each reel motor 13 and 14. The reel motor control signals c and d are also sent to the capstan motor 15.
A capstan motor control signal e is output to control each of the above-mentioned components.

Further, when the select terminal 2a of the changeover switch 2 is turned on and the information signal of the magnetic tape 20 reproduced by the magnetic head 1 is input, the controller 16' uses a built-in timing function to determine the timing. The tape speed at the part of the magnetic tape 20 where the information signal is recorded is calculated, and the magnetic tape 2 is moved at this tape speed.
A capstan motor control signal e is output to the capstan motor 15 so as to reproduce 0.

Next, the capstan motor control processing process of the tape drive device configured as described above will be explained below with reference to FIG.

First, the level VL of the capstan motor control signal e is initialized to a constant value VL1 that allows the magnetic tape 20 to run at a constant speed suitable for the format of the signal to be recorded and reproduced (step 21:Hereafter, S
21). Next, it is determined whether the mode instructed by the operation switch 17' is recording or reproducing information signals (S22). If the instructed mode is recording, the tape running speed control process is immediately terminated in order to continue outputting the initial value VL1 as the level VL of the capstan motor control signal e. If the instructed mode is reproduction, the process moves to S23 and the information signal is read. Since the information signal is output as the tape runs, reading is continued until the end of the output of the information unit is recognized in the next step S24. If output completion is recognized, the process moves to S25.
Read the timer value tj inside the controller 16'. Next, the predicted information output end time value ts calculated in advance
and the timer value tj (S26), and if tj>ts, the process moves to S27 and the level VL of the capstan motor control signal e is set to 1 in order to increase the rotational speed of the capstan 11.
Conversely, if tj<ts, the process moves to S28, and the level VL of the capstan motor control signal e is decreased by one step to reduce the rotational speed of the capstan 11, and if tj=ts, the capstan motor control is decreased by one step. signal e
The process directly advances to S29 without changing the level VL. In S29, the controller 16' at the time of output completion confirmation obtained in S25 is
By adding the standard time tb required for outputting one information unit to the internal timer value tj, the next expected information output end time ts'=tj+tb is calculated. Next, in S30, it is determined whether or not there is a request for mode change using the operation switch 17'. If there is no request, the process returns to S23, and if there is, the tape running speed control process is directly completed.

With the processing described above, when recording information signals, the tape is run at a certain speed, and even if there is some fluctuation or fluctuation in the tape speed, the timing of the output signal is monitored during playback, so that the tape can be By controlling the speed to be the same as when recording, it is possible to output the information signal in the same state as it was input.

[0009]

However, in the above-mentioned conventional tape drive device, the tape speed when recording information signals varies due to variations in the diameter of the capstan 11 or the sensitivity of the capstan motor 15. There are differences between individual devices. Therefore, when reproducing information signals recorded at a constant tape speed over the entire magnetic tape 20, it is possible to have compatibility between other devices, but if the information signals are partially recorded with one device, When the magnetic tape 20 that has been recorded is additionally recorded by another device and then played back, the tape running speed during recording changes rapidly at the additional recording start position, and the playback speed control cannot follow it and becomes unstable. In the worst case, the information signal may not be readable. Therefore, when the magnetic tape 20 is shared between a plurality of devices, there is a problem in terms of compatibility.

The present invention was invented in view of the above problem, and when additional recording is performed on a magnetic tape on which information has already been partially recorded, the tape is moved at the same speed as when recording the already recorded portion. The aim is to ensure compatibility between devices.

[0011]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the tape drive device of the present invention includes a recording/reproducing means for recording/reproducing information signals on a magnetic tape as a recording medium, and a magnetic A tape running means for running the tape; a tape speed control means for controlling the running speed of the magnetic tape run by the tape running means; The following measures are taken in a tape drive device equipped with a control means that determines the timing using a timing function and controls a tape speed control means.

That is, when additional recording is performed on a magnetic tape on which an information signal is partially recorded, the above-mentioned control means inputs the information signal of the magnetic tape and adjusts the tape speed of the magnetic tape on which this information signal is recorded. is calculated, and the writeable portion of the magnetic tape is made to run at that speed.

[0013]

[Operation] According to the above structure, when additional recording is performed on a magnetic tape partially recorded with an information signal, the above information signal is reproduced for a certain period of time by the recording/reproducing means, and this information signal is input to the control means. let Thereby, the control means calculates the tape speed of the magnetic tape on which the information signal is recorded, and then controls the tape speed control means at the same tape speed as the above-mentioned tape speed. Therefore, the information signal that is additionally recorded by the recording/reproducing means is recorded on the magnetic tape at the same tape speed as the already recorded information signal, and as a result, the information signal is recorded at the same tape speed over the entire magnetic tape. can be recorded.

[0014]

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In this embodiment, for convenience of explanation, members having the same functions as those in the conventional example are given the same reference numerals.

The tape drive device according to this embodiment includes a recording/reproducing means for recording/reproducing information signals on a magnetic tape as a recording medium, a tape running means for running the magnetic tape, and a tape running means for running the magnetic tape. tape speed control means for controlling the traveling speed of the magnetic tape being run by the recording/reproducing means; and tape speed control means for determining the timing using a built-in timing function when an information signal of the magnetic tape played back by the recording/playing means is inputted; and a control means for controlling.

As shown in FIG. 2, the recording/reproducing means includes a magnetic head 1 attached with a magnetic tape 20 for recording/reproducing information signals on the magnetic tape 20, and
A recording section for recording an information signal as a recording signal on the magnetic tape 20, a reproducing section for reproducing the information signal as a reproduction signal, and a changeover switch for switching the connection of the recording section or the reproducing section to the magnetic head 1. 2. The changeover switch 2 has one end connected to the magnetic head 1, while the other end is provided with two select terminals 2a and 2b, and when the select terminal 2a is turned on, the magnetic head 1 is connected to the magnetic head 1. The head 1 and the recording section are connected, while the magnetic head 1 and the reproducing section are connected when the select terminal 2b is turned on. The recording section consists of a recording signal processing circuit 3 and a signal input terminal 4, and during recording operation, a changeover switch 2
When the select terminal 2a is turned on and an information signal reproduced by another device (not shown) is input from the signal input terminal 4, the recording signal processing circuit 3 records the information signal on the magnetic tape 20. Convert to a recording signal suitable for
It is designed to output to the magnetic head 1. The reproduction section includes a reproduction signal processing circuit 5 and a signal output terminal 6,
During playback operation, select terminal 2 of changeover switch 2
When b is turned on and the information signal of the magnetic tape 20 reproduced by the magnetic head 1 is input to the reproduction signal processing circuit 5,
A reproduction signal processing circuit 5 converts the above-mentioned information signal into a reproduction signal suitable for reproduction and outputs it to a signal output terminal 6.

The tape running means includes a supply reel stand 7 rotatably supporting the supply reel 20a of the magnetic tape 20;
A take-up reel stand 8 rotatably supports the take-up reel 20b of the magnetic tape 20, a tape guide 9 attaches the magnetic tape 20 on the supply reel 20a side, and the magnetic tape 20 on the take-up reel 20b side is attached. A tape guide 10 and a capstan 1 that runs the magnetic tape 20 at a target speed.
1 and a pinch roller 12 which pinches the magnetic tape 20 between the capstan 11 and maintains running stability of the magnetic tape 20. Each reel stand 7 and 8 above
The reel motors 13 and 14 are mechanically connected to each other, and the rotation of the reel motors 13 and 14 rotates the magnetic tape 20 according to the operation mode such as recording, playback, fast forwarding, rewinding, etc. It is designed to take up the winding. Note that the positive direction (arrow A) of the magnetic tape 20 for recording, reproducing, etc.
), the magnetic tape 20 is wound onto the take-up reel 20b by the rotation of the reel motor 14. Each of the above tape guides 9 and 10
The magnetic tape 20 is attached thereto to guide the magnetic tape 20 within the travel path. The capstan 11 is disposed within the running path of the magnetic tape 20 between the magnetic head 1 and the tape guide 10, and
A capstan motor 15 is mechanically connected, and the rotational speed of the capstan motor 15 is controlled by the rotational operation of the capstan motor 15, thereby controlling the running speed of the magnetic tape 20.

The tape speed control means and the control means include:
The controller 16 is configured as an integrated circuit. The output side of the controller 16 is connected to the changeover switch 2, the reel motors 13 and 14, and the capstan motor 15, while the input side is connected to the operation switch 1.
7 and the input side of the reproduced signal processing circuit 5. The controller 16 described above includes the operation switch 1
When an instruction signal a corresponding to an operation mode such as recording, playback, fast forwarding, rewinding, etc. is input from 7, a switch control signal b is input to the changeover switch 2, and a switch control signal b is input to each reel motor 13, 14 according to each operation mode. is each reel motor control signal c
-d and a capstan motor control signal e to the capstan motor 15, respectively, to control each of the above-mentioned constituent members. Further, the controller 16 is configured such that the select terminal 2b of the changeover switch 2 is ON.
When the information signal of the magnetic tape 20 reproduced by the magnetic head 1 is input, the built-in timing function determines the timing and calculates the tape speed at the part of the magnetic tape where the information signal is recorded. Then, the capstan motor 15 is operated to run the magnetic tape 20 at this tape speed.
It is designed to control the rotation of.

In the above configuration, the process of capstan motor control processing by the present tape drive device will be explained below based on the flowchart shown in FIG.

First, the level VL of the capstan motor control signal e is initialized to a constant value VL1 that allows the magnetic tape 20 to run at a constant speed suitable for the format of the signal to be recorded and reproduced (step 1). :Hereinafter, it will be written as S1). Next, it is determined whether the mode instructed by the operation switch 17 is additional recording of information signals (S2). In the case of additional recording, the process moves to S4, and the magnetic tape 20 is rewound a certain distance from the recording start position (a distance sufficient for capstan speed control to settle into a steady state after starting the reproduction operation). Next, in S5, the mode is set to play and the process moves to S6 and subsequent steps. On the other hand, if it is not additional recording, the process moves to S3, and it is determined whether the mode instructed by the operation switch 17 is recording or reproducing information signals. If the instructed mode is recording (not additional recording), the capstan motor control signal e
In order to continue outputting the initial value VL1 as the level VL, the tape running speed control process is ended. If the instructed mode is playback or additional recording, the process moves to S6;
The controller 16 reads the information signal reproduced by the magnetic head 1. Since the above information signal is output as the magnetic tape 20 runs, reading is continued until the end of output of the information unit is recognized in the next step S7. If the end of output is recognized, the process moves to S8, and controller 1
6. Read the internal timer value tj. Next, the information output end time value ts and timer value tj calculated in advance are
(S9), if tj>ts, the process moves to S10, and the level VL of the capstan motor control signal e is increased by one step in order to increase the rotation speed of the capstan 11; conversely, if tj<ts, the process moves to S10. If tj=ts, the process moves to S11 and the level VL of the capstan motor control signal e is decreased by one step in order to lower the rotational speed of the capstan 11, and if tj=ts, the process moves to S12 without changing the level VL of the capstan motor control signal e. . In S12, the average value VL3=Σ(VL
)/N (in experiments, the value of N is 10 to 20
(the degree is appropriate). Next, by adding the standard time tb required for outputting one information unit to the timer value tj inside the controller 16 at the time of recognizing the output end obtained in S8, the expected time value ts for the next information output end is determined. '=tj+
tb is calculated (S13). Then, in S14, it is determined whether or not the position of the magnetic tape 20 has moved to the additional recording start position during the playback operation at the start of additional recording in S5 described above, and if it has moved to the recording start position, S1
After setting the recording mode in step 5, the VL3 calculated in step S12 described above is outputted as the capstan motor control signal e (step S16), and the tape running speed control process ends. On the other hand, if you have not yet moved to the recording start position during normal playback or when starting additional recording,
It is determined whether or not there is a request for mode change using the operation switch 17 (S17). If there is no request, the process returns to S6; if there is, the tape running speed control process is immediately terminated.

As described above, when recording information signals additionally, the present tape drive device returns the magnetic tape 20 a little from the recording start instruction position, and moves the magnetic tape 20 that has already been recorded onto the magnetic tape 20.
After reproducing the information signal and calculating the level VL of the capstan motor control signal e to make it the same as the tape speed at the time of recording by using the reproduction tape speed control processing during that time, at that tape speed. By starting recording, changes in the recording tape speed before and after the additional recording start position are eliminated.

[0022]

[Effects of the Invention] As described above, in the tape drive device of the present invention, when additional recording is performed on a magnetic tape on which information signals are partially recorded, the above-mentioned control means inputs the information signals of the magnetic tape. , the tape speed of the magnetic tape on which this information signal is recorded is calculated, and the additionally recorded portion of the magnetic tape is made to run at that speed.

[0023] As a result, even when additionally recording information signals on a magnetic tape on which information signals have already been recorded by another device, the information signals can be additionally recorded at the same tape speed as the already recorded information signals. Can be recorded. Therefore, even when a magnetic tape is shared with other devices, information signals can be recorded at a constant tape speed over the entire magnetic tape. This has the advantage that compatible tape drive devices can be provided.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a process of capstan motor control processing by a tape drive device of the present invention.

FIG. 2 is a schematic configuration diagram showing the above tape drive device.

FIG. 3 is a flowchart showing a capstan motor control process performed by a conventional tape drive device.

FIG. 4 is a schematic configuration diagram showing the above tape drive device.

[Explanation of symbols]

1 Magnetic head 2 Changeover switch 3 Recording signal processing circuit 4 Signal output terminal 5 Playback signal processing circuit 6 Signal output terminal 7 Supply reel stand 8 Take-up reel stand 9/10 Tape guide 11 Capstan 12 Pinch roller 13/14 Reel motor 15 capstan motor 16
Controller 17 Operation switch 20 Magnetic tape

Claims (1)

[Claims] 1. Recording/reproducing means for recording/reproducing information signals on a magnetic tape as a recording medium, tape running means for running the magnetic tape, and running of the magnetic tape run by the tape running means. A tape speed control means for controlling the speed, and a control means for controlling the tape speed control means by determining the timing using a built-in timing function when an information signal of the magnetic tape reproduced by the recording/reproducing means is input. When performing additional recording on a magnetic tape on which an information signal is partially recorded in a tape drive device, the control means inputs the information signal on the magnetic tape and reads the information signal on the magnetic tape on which the information signal is recorded. A tape drive device characterized in that the speed is calculated and the write-once portion of a magnetic tape is caused to run at the calculated speed.