KR0166730B1 - Magnetic recording / playback device - Google Patents

Abstract

The magnetic recording / reproducing apparatus uses the full-width erasing head for complete erasing of the signals recorded on the magnetic tape running from the supply reel to the take-up reel through the head drum. The full-width erasing head is located on the tape running path between the head drum and the winding reel, and erases the signal recorded on the magnetic tape running from the head drum to the winding reel, and the operation of the full-width erasing head is controlled by the microcomputer. Unlike conventional full-width heads located between the supply reel and the head drum, these full-width heads can be deleted immediately after the signal recorded on the magnetic tape is played back. Accordingly, the present invention provides an effect of easily editing the magnetic tape as compared with the conventional method in which the playback, rewind, and delete operations must be performed separately.

Description

Magnetic recording / playback device

1 is a diagram showing a tape traveling system of a general magnetic recording / reproducing apparatus.

2 is a diagram showing a tape traveling system of the magnetic recording / reproducing apparatus according to the embodiment of the present invention.

3 is a main block diagram of a magnetic recording / reproducing apparatus according to an embodiment of the present invention;

4 is a flow chart for explaining the operation of the microcomputer of FIG.

* Explanation of symbols for main parts of the drawings

34: head drum 37,42: full-width head

50: key input section 51: microcomputer

52: deck 53: motor unit

56: servo control unit

The present invention relates to a magnetic tape recording / reproducing apparatus, and more particularly, to a magnetic recording / reproducing apparatus capable of simultaneously performing a reproducing operation and erasing operation of a signal recorded on a magnetic tape.

In general, a magnetic recording / reproducing apparatus has both a function of reproducing a video signal and an audio signal recorded on a magnetic tape and a function of recording a new video signal and an audio signal on a magnetic tape. In such a magnetic recording / reproducing apparatus, it is sometimes necessary to record a new video signal and an audio signal on a magnetic tape on which video signals and audio signals are already recorded. In this case, the magnetic recording / reproducing apparatus records the new video signal and the audio signal after deleting the video signal and the audio signal already recorded on the magnetic tape.

1 shows a tape traveling system of a general magnetic recording / reproducing apparatus. When the cassette 10 is mounted on the magnetic recording / reproducing apparatus, the magnetic tape 13 comes out of the supply reel 11 during the recording or reproducing operation of the magnetic recording / reproducing apparatus, passes through a predetermined path, and then winds up the reel 12. Coiled on The head drum 14 located on the travel path of the magnetic tape 13 has image heads 15 on its circumferential surface. The head drum 14 allows the image heads 15 to record or reproduce the video signal recorded on the magnetic tape 13 while rotating in the direction of the arrow. The magnetic tape 13 coming out of the supply reel 11 passes through a tension pole 16, a full erase head 17, and a supply guide roller 18. Proceed to (14). The tension pole 16 is to maintain the tension of the magnetic tape 13, the full width erasing head 17 serves to erase all the video and audio signals recorded on the magnetic tape (13). The feed guide roller 18 allows the magnetic tape 13 to maintain a constant contact area with the head drum 14. The magnetic tape 13 passing through the head drum 14 includes a winding guide roller 19, an audio erase head 20, an audio / control head 21, a capstan 22, and a pinch roller 23. , And proceed to the take-up reel (12) via the guide pin (24). The winding guide roller 19 serves as the feed guide roller 18. The audio / control head 21, which is installed in close contact with the audio muting head 20, is composed of an audio recording-reproducing head and a recording-reproducing head of control pulses to record sound signals and control signals on the magnetic tape 13. Or play. The camston 22 and the pinch roller 23 serve to transfer the magnetic tape 13 at an accurate speed. The guide pin 24 serves to guide the magnetic tape 13 so that the magnetic tape 13 can be smoothly supplied to the winding reel 12.

In the conventional magnetic recording / reproducing apparatus having the above-described tape traveling system, the full width erasing head 17 is ahead of the image heads 15 and the audio / control head 21 with respect to the traveling of the magnetic tape 13. Therefore, it was not possible to immediately delete the video signal and the audio signal after playback. Therefore, in order to reproduce and delete the video and audio signals recorded on the magnetic tape 13, the playback, rewinding of the magnetic tape 13, and deletion of the signals recorded on the magnetic tape 13 are sequentially performed separately. There is an inconvenience to be done. In particular, this inconvenience is further increased when the video signal and the audio signal of some sections are deleted.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to use a new full-width erasing head to reproduce a video signal and an audio signal recorded on magnetic tape while simultaneously deleting a video signal and an audio signal recorded on magnetic tape. / Provides a playback device.

An apparatus for recording / reproducing video and audio signals on a magnetic tape traveling from a supply reel to a reel through a head drum according to the present invention for achieving the above object is located on a tape running path between a head drum and a reel. A full erase head for erasing all signals recorded on the magnetic tape running from the head drum to the reel, and means for controlling the operation of the full erase head.

The full width erased head can erase all image signals, sound signals, and control signals recorded on the magnetic tape.

The control means controls the full-width erasing head to perform the erasing function when the signal recorded on the magnetic tape is to be reproduced and erased only once.

A key input unit is further configured to allow a user to control the operation of the amplitude erasing head.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2 shows a tape traveling system of the magnetic recording / reproducing apparatus according to the present invention. In the tape traveling system of FIG. 2 according to a preferred embodiment of the present invention, a new full width erasing head 42 having the same function as the full width erasing head 17 is added to the existing tape traveling system shown in FIG. . The new full erase head 42 is installed at a suitable position between the head drum 34 and the winding reel 32. In one embodiment of the present invention, it is installed immediately behind the audio / control head 41. The magnetic tape 33 coming out of the supply reel 31 of the cassette 30 passes through the tension pole 36, the first full width erase head 37, and the supply guide roller 38, similarly to the tape traveling system of FIG. Proceed to the head drum 34. However, the magnetic tape 33 traveling from the head drum 34 having the image heads 35 on the circumferential surface to the winding reel 12 has a winding guide roller 39, an audio erasing head 40, and audio / control. In addition to passing through the head 41, the capstan 43, the pinch roller 44 and the guide pin 45, a second full width erase head 42 newly installed between the audio / control head 41 and the capstan 43. Will pass).

Therefore, the magnetic recording / reproducing apparatus having the tape traveling system of FIG. 2 is configured to transfer all recording signals such as video signals, audio signals, and control signals recorded on the magnetic tape 33 to the head drum of the traveling path of the magnetic tape 33. It can be selectively erased in the forward position or the backward position with reference to 34). That is, by the operation of the first full width erasing head 37, all the recording signals recorded on the magnetic tape 33 traveling toward the head drum 34 are erased. Then, by the operation of the second full width erase head 42, all the recording signals recorded on the magnetic tape 33 passing through the head drum 34 are erased.

3 is a block diagram of an essential part of the magnetic recording / reproducing apparatus according to the present invention. In FIG. 3, the key input section 50 allows the viewer to select a desired function of the magnetic recording / playback apparatus. The key input unit 50 includes a one time playback key 57 for simultaneously performing reproduction and deletion of the signal recorded on the magnetic tape 33. The output terminal of the key input section 50 is connected with a microcomputer 51 for controlling various operations of the magnetic recording / reproducing apparatus. The deck 52 connected to the microcomputer 51 includes a motor portion 53, first and second full width erase heads 37 and 42. The motor 53 is composed of a plurality of motors for rotating the head drum 34, the supply reel 31, the take-up reel 32 and the like. Deck 52 further includes various devices used for tape travel, although not shown. The servo control unit 56 provided between the microcomputer 51 and the deck 52 controls the driving of the motor unit 53 installed in the deck 52 in response to the control of the microcomputer 51, and the motor It detects the state of the unit 53 and serves to supply to the microcomputer 51.

First, when a recording command is input through the key input unit 50, the second full width erase head 42 does not operate and the first full width erase head 37 performs an erase operation. When the first full width erasing head 37 is operated, all signals recorded on the magnetic tape 33 are erased, or all signals recorded on the magnetic tape 33 are erased while new signals are recorded at the same time. ) Is recorded. In this case, the apparatus of FIG. 3 operates in the same manner as the conventional magnetic recording / reproducing apparatus, and a brief description of its operation is as follows. The microcomputer 51 responding to the recording command controls the servo control unit 56, whereby the servo control unit 56 controls the driving of the motor unit 53 provided in the deck 52. At the same time, the servo controller 56 detects a change in driving speed of the motors in the motor unit 53 and outputs the same to the microcomputer 51. The microcomputer 51 receives the output signal of the servo controller 56 to check the driving speeds of the motors, and outputs a new control signal to the servo controller 56. By repeating this process, the magnetic recording / reproducing apparatus adjusts the driving speeds of the respective motors appropriately, and the magnetic tape 33 travels along the driving path at a constant speed. On the other hand, the microcomputer 51 operates the first full width erase head 37 of the deck 52 in response to the key input unit 50. Accordingly, the magnetic tape 33 passes through the first full width erasing head 37 and erases signals that have already been recorded, and passes the image head 35 and the audio / control head 41 of the head drum 34. New signals are recorded.

On the other hand, when the regeneration operation key on the key input unit 50 is pressed, the magnetic tape 33 travels from the supply reel 31 to the winding reel 32 via the head drum 34, and thus the magnetic tape 33 The signals recorded in the are reproduced by the video head 35 and the audio / control head 41. When the one time playback key 57 is pressed again while the play key on the key input unit 50 is pressed, the microcomputer 51 responds to the output of the key input unit 50 to the second full width. The erase head 42 is operated. When the second full width erasing head 42 is operated, signals reproduced by the image head 35 and the audio / control head 41 are erased from the magnetic tape 33. In the above-described embodiment, a separate reproducing operation key 57 is configured, but the apparatus of FIG. 3 can be configured to operate in the same manner as when the reproducing operation key 57 is pressed only by pressing the reproducing operation key once again. Can be.

The operation of the microcomputer 51 when the reproducing operation and the deleting operation are performed simultaneously will be described with reference to FIG.

When a key input via the key input unit 50 occurs, the microcomputer 51 determines whether the input key signal is a reproduction key signal (step 101). If it is determined in step 101 that it is a playback key signal, the microcomputer 51 controls each device so that the apparatus of FIG. 3 performs a playback operation (step 102). When a new input key signal is applied through the key input unit 50 while the reproducing operation is being performed, the microcomputer 51 determines whether the signal is the on signal of the reproducing operation key once (step 103). . If the input signal is the ON signal of the regeneration operation key once, the microcomputer 51 operates the second full-width erasing head 42 (step 104). On the other hand, the microcomputer 51 performs step 107 when the input signal is not the ON signal of the reproducing operation key. If a new key signal is input to the microcomputer 51 while the second full-width erasing head 42 is in operation, the microcomputer 51 determines whether the signal is an off signal of the once regeneration operation key (step 105). . In the case of the off signal of the once-playback operation key, the microcomputer 51 turns off the operation of the second full width erase head 42 (step 106). The microcomputer 51 executes step 107 when the input signal is not the OFF signal of the once-playback operation key. Once a new key signal is input to the microcomputer 51 while the playback operation key is turned off, the microcomputer 51 determines whether the input key signal is a stop key signal (step 107). If the input key signal is a stop key signal, the microcomputer 51 ends the playback operation (step 108). If the input key signal is not the stop key signal, the microcomputer 51 executes again from step 103.

As described above with reference to FIGS. 2, 3, and 4, the magnetic recording / reproducing apparatus according to the present invention reproduces the video signal and the audio signal recorded on the magnetic tape only once and deletes it. And delete operations can be performed at about the same time. Therefore, there is an effect that the trouble of the user's operation by the conventional magnetic recording / reproducing apparatus which has to separately perform each of the reproducing operation, the tape rewinding operation, and the erasing operation of the desired portion can be eliminated. In addition, since the signal can be deleted while watching and reproducing the video and audio signals recorded on the magnetic tape during tape editing, the deletion section can be set quickly and accurately.

Claims (3)

An apparatus for recording / reproducing video and audio signals on a magnetic tape traveling from a supply reel to a winding reel through a head drum, the apparatus being located on a tape running path between the head drum and a winding reel and traveling from the head drum to a winding reel. A full-width erasing head for erasing all signals recorded on the magnetic tape; And means for controlling the operation of the full-width erasing head. The magnetic recording / reproducing apparatus according to claim 1, wherein the control means controls the full-width erasing head to perform an erasing function when the signal recorded on the magnetic tape is to be reproduced and erased only once. 2. The magnetic recording / playback apparatus according to claim 1, further comprising key input means for allowing a user to control the operation of the amplitude canceling head.