KR0133412B1 - X-distance automatic control melthod and the apparatus of - Google Patents

Abstract

The present invention relates to a V-RX automatic distance adjusting device, the conventional technique of manually adjusting the X distance requires a screw in the deck mechanism for the X distance adjustment, the manufacturing cost increases, and a long time to adjust There is a problem that it takes. In addition, in the prior art in which the control signal reproduced and outputted by the control head is delayed to obtain an effect of directly adjusting the X distance, the control signal should be recorded as early as the occurrence delay time when the image signal is recorded, unlike the reproduction time. Conventionally, this is not possible, and there is a problem that the accuracy is too low when using the control signal reproduced and output from the control head. Therefore, the present invention calculates the delay time of the control signal by counting the time taken from the edge transition of the head switching signal to the generation of the control signal by using the microcomputer to calculate the delay time of the control signal, thereby eliminating the need for a screw in the deck mechanism. In addition, the manufacturing cost is reduced and the X distance adjustment time is greatly reduced, and the accurate X distance adjustment is made.

Description

Method and device for automatic adjustment of V-distance

1 is a partial structural diagram of the conventional VCA of the deck mechanism.

2 is a timing diagram for a general head switching signal and a control signal.

3 is an X distance compensation circuit diagram of a conventional magnetic recording / reproducing apparatus.

Figure 4 is a blur of the automatic distance control device of the present invention V-real.

5 is a flow chart of FIG.

* Explanation of symbols for main parts of the drawings

201: Drum Servo 202: Control Head

203: display unit 204: microcomputer

205: memory 206: key input unit

207: signal processor 208: image head

The present invention relates to a technique for adjusting the X distance of the VCR (VCR), and in particular, to automatically adjust the X-grill of the V-C is suitable to automatically adjust the X-distance of the V-Cal using a microcomputer or the like. A method and apparatus are disclosed.

In general, to adjust the X distance means to move the position of the control head relative to the video head, and the main reason for adjusting the X distance is the specification of VCA. This is to maintain compatibility between them.

This X distance is 79.244mm in phone size.

The WP1 diagram shows the structure of the deck mechanism of the conventional V-Cal. In regeneration, the tape 10 is wound from the supply reel RL1 to the reel RL2 which is sequentially wound through the drum 20 and the control head 40. And, as shown, the distance from the image head (B) to the control head 40 is the X distance (X).

Conventionally, in order to make the X distance required by the V-Cal standard, as shown by reference numeral 30 in FIG. 1, the screw 30 is mounted on the deck mechanism so that the control head 40 can be moved. Install and adjust the X distance while turning the screw 30 manually.

That is, when the video signal is maximized by rotating the screw 40 while the normal tape 10 is being reproduced at 1x speed, the X distance is manually adjusted by stopping the rotation of the screw 40.

2 (a) and (b) shows the head switching signal (H /) output from the drum servo (not shown) of V-CAL for switching between the image head (A) and the image head (B) on the drum (20). The timing relationship between the waveform of S) and the waveform of the control signal CTL obtained by reproducing the general tape 10 is shown. The edge transition of the head switching signal H / S of (a) is adjusted by the X distance adjustment above. It can be seen that the control signal CTL is generated (low to high) at a time after a predetermined time TD after (B → A). 3 shows that the above-described time TD (hereinafter, referred to as 'delay time of occurrence') should be generated between the edge transition of the head switching signal H / S and the generation of the control signal CTL. As shown in the figure, the X-distance compensation circuit of the conventional magnetic recording / reproducing apparatus which achieves the same effect as adjusting the X-distance directly is shown. The control signals output from the control head 101 are delayed by using (103) (104).

In this case, reference numeral '105' is a capstan servo part, '107' is an audio processor, '108' is a switch control part, and '109' is a drum servo part. In particular, in the switch controller 108, 'LPF' is a low pass filter, 'MM' is a monostable multivibrator, '108-1' is a detector, 'F / F' is a flip-flop, 'INV' is an inverter, DIFF 'is the differentiator and' RPG 'is the reference pulse generator.

Meanwhile, V-X's X-distance adjustment technology is disclosed in the invention of the prior patent application 89-20744 (Applicant: Samsung Electronics).

This technology has a problem that it is very inconvenient to adjust the X distance every time the tape is replaced by regenerating the normal tape.

The problem with the prior art of manually adjusting the X-distance is that it requires a screw in the deck mechanism for the X-distance adjustment, which increases the manufacturing cost and takes a long time to adjust the X-distance.

In addition, the problem in the prior art that the control signal obtained from the normal tape is delayed to obtain the effect of directly adjusting the X-distance and comparable effect is that, when reproducing the video signal, the control signal is generated as early as the 'delay time' unlike the reproduction time. It must be recorded, but it cannot be done conventionally, and the accuracy is inferior because it uses a control signal from a general tape instead of a standard regenerated tape.

The present invention has been made in view of these conventional problems.

Accordingly, it is an object of the present invention to provide a method and apparatus for automatically adjusting the X-distance of V-C which does not require a screwdriver to adjust the X-distance.

Another object of the present invention is to provide a method and an apparatus for automatically adjusting an X-grill of a V-CAL which allows accurate adjustment of an X-grill by adjusting a generation delay time using a control signal from a standard reproducing tape for adjustment.

According to the above objects, the present invention automatically adjusts the X-distance of V-R, according to the first process of regenerating the standard reproducing tape for adjustment, and generating a delay time for generating a control signal from the standard reproducing tape for adjustment through the first process. Obtaining a second process, a third process of storing the occurrence delay time obtained in the second process, and a second process of adjusting the X distance by using the generation delay time stored in the third process when reproducing or recording the general tape. It consists of four steps.

According to the above objects, V-X automatic control device of the present invention includes a key input unit for receiving an X distance adjustment command after the end of the automatic tracking of the standard reproducing tape for adjustment; Memory; When the X-distance adjustment command is input through the key input unit, the delay time of the control signal is obtained and stored in the memory. Then, the micro-computer adjusts the X-distance according to the stored delay time when the normal tape is reproduced or recorded. It is composed.

The operation and effect of the present invention made and configured as described above will be described in detail with reference to FIGS. 4 and 5 showing one embodiment.

In the present embodiment, V-X automatic adjustment device of the present invention V, as shown in Figure 4, the microcomputer 204, the drum servo unit 201, the control head 202, the key input unit 206 And the generation delay time in accordance with the signal input from the signal processing unit 207, and store the resultant delay time in the memory 205, and then automatically generate the X distance using the generation delay time of the memory 205 during normal tape playback or recording. It is configured to adjust. In this case, reference numeral '203' is another embodiment of the present invention and will be described later.

In such a configuration, first, the crude standard reproducing tape is regenerated (ST1).

When the standard playback tape for adjustment is being reproduced in this manner, the signal processing unit 207 receives the video signal of the standard playback tape for adjustment from the video head 208, detects an envelope of the video signal, and detects the microcomputer 204. ), The microcomputer 204 checks this envelope and finishes auto-tracking (ST2).

After the automatic tracking, the microcomputer 204 receives the X distance adjustment command from the key input unit 206 (ST3), and then switches the head switching signal (H / S) for switching the image head from the drum servo unit 201. Starts counting at the edge transition point at which the head switching signal (H / S) is transitioned, and stops the counter when the control signal (CTL) of the standard reproducing tape for adjustment is input from the control head (202). The time at which the count has progressed is obtained, and the time is defined as the generation delay time TD of the control signal CTL from the adjustment standard reproducing tape (ST4) (ST5).

That is, the time taken from the procedure of switching the image head to the control signal from the standard reproducing tape for adjustment is obtained, and the obtained delay time TD of the control signal CTL is used to obtain the control signal CTL. Obtain the generation delay time (TD).

In this way, the microcomputer 204 having obtained the generation delay time TD of the control signal CTL from the adjustment standard reproducing tape stores the generation delay time TD of the control signal CTL in a memory (e.g. The data is stored in the (EEPROM) 205 (ST6).

In this way, after the generation delay time TD of the signal CTL is stored in the memory 205, the microcomputer 204 stores the generation delay time TD from the memory 205 when the normal tape is reproduced or recorded. Read and adjust the X distance adjustment automatically.

Since the operation of the microcomputer 204 is generally completed in tens of milliseconds (ms), the X distance adjustment time is greatly shortened.

In FIG. 4, the display unit 203 shows another embodiment of the present invention. The display unit 203 may be configured as a buzzer or a display device. When the microcomputer 204 completes the adjustment of the X distance, it is visually or audible. To inform.

As described in detail above, the present invention counts the time taken from the edge transition of the head switching signal to the generation of the control signal in the microcomputer to obtain the generation delay time of the control signal and automatically adjusts the X distance according to the generation delay time. This eliminates the need for a screw in the deck mechanism, reducing manufacturing costs, greatly reducing the X distance adjustment time, and precisely adjusting the X distance.

Claims (6)

A first process of regenerating the standard reproducing tape for adjustment, a second process of obtaining the generation delay time of the control signal through the first process, a third process of storing the generation delay time obtained in the second process, and general And a fourth step of automatically adjusting the X distance by using the generation delay time stored in the third step when playing or recording the tape. 2. The second process of claim 1, wherein the second process obtains a time taken from the time when the image head is switched until the control signal from the standard reproducing tape for adjustment is obtained, and sets this time as the generation delay time of the control signal. How to automatically adjust X distance The method of claim 1, further comprising a fifth process of notifying that the X distance adjustment is completed after the fourth process. A key input unit which accepts an X-distance adjustment command after the end of the automatic tracking of the standard reproducing tape for adjustment; Memory; When the X distance adjustment command is input through the key input unit, a microcomputer for obtaining the generation delay time of a control signal and storing the result in the memory, and then adjusting the X distance according to the generation delay time stored in the memory when reproducing or recording a general tape. Automatically adjust the X distance of the V-C characterized by having a. The microphone computer calculates the generation delay time by counting from the time of switching of the image head to the control signal obtained from the standard playback tape, and considering the counted time as the generation delay time. V-X automatic distance adjuster. The apparatus of claim 4, further comprising a display unit for visually or audibly notifying when the microcomputer completes the adjustment of the X distance.