KR0155705B1 - Control method for fast foward in magnetic tape record/reproduce system - Google Patents

Abstract

A method is disclosed in which a magnetic tape recording and reproducing apparatus can be switched to a reproducing operation at an arbitrary position set by a user during high-speed driving.

Performing fast forward (FF) or fast reverse (REW), detecting current position (C) of the tape, setting stop position (S), present position (C) and stop position ( And switching to normal playback at the point where the counter value of M) matches.

Description

High-speed driving control method of magnetic tape recording and reproducing apparatus

1 is a general block diagram of VTIAL.

2 is a flowchart of a high-speed driving control method according to the present invention.

* Explanation of symbols for main parts of the drawings

10: function switch 20: remote control

30: deck portion 40: signal processing portion

50: sensor unit 60: reel pulse detection unit

70: Digitron 80: OSD

100: micom

The present invention relates to a traveling control method of a magnetic tape recording and reproducing apparatus, and more particularly, to a high-speed driving control method for switching to ordinary playback at an arbitrary position set by a user during high-speed driving.

In a conventional magnetic tape recording and reproducing apparatus (hereinafter referred to as VTIAL), a high speed driving method is used to move a tape to a position to be viewed by a user at high speed. When the user inputs the high speed driving command through the high speed driving command key (FF / REW), VT's traveling system is controlled to perform the high speed driving operation. The position at the time of travel is detected by a counter. The user observes the counter and stops the tape running at the position determined to be appropriate and switches to normal playback.

In this method, the user had to predict the desired stop position and perform high speed driving. In the case of performing a random search, it is difficult to predict the stop position, so there is a problem in that a key must be frequently operated in order to search for an accurate position.

On the other hand, an automatic stop method using a memory key is used to store the time of reproduction during recording. In this method, if the counter is set to 0 at the desired part of the tape and the memory key is input, the counter value is automatically stopped at the position where the counter value becomes zero upon fast rewinding for playback after recording is completed.

In the automatic stop method using the memory key, the counter stops only at the position where the value of the counter becomes zero. Therefore, it is difficult for the user to stop at a certain position by simple operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a method which can be switched to a reproduction operation at an arbitrary position set by a user during high-speed driving of a magnetic tape recording / reproducing apparatus.

The regeneration method of the present invention for achieving the above object comprises the steps of performing a fast forward (FF) or a fast reverse (REW); Detecting the current position (C) of the tape; Setting a stop position (S); And a process of switching to normal playback at a point where the counter value of the current position C and the stop position M coincide. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the general configuration of VTIAL. In FIG. 1, the function switch 10 is usually installed at the front part of the VTI and consists of a plurality of push switches to input a user's command. The user's command may be input through the remote controller 20 and the preamplifier 24. The remote controller 20 includes a plurality of push switches and a numeric pad. The microcomputer 100 decodes commands input by the function switch 10 or the remote controller 20 and controls the operation of the entire device such as operating the deck unit 30 and the signal processing unit 40. The sensor unit 50 transmits the tip or end of the tape to the microcomputer 100 by the start sensor / end sensor (not shown) of the sensor unit 50. The reel pulse detection unit 60 detects the rotation of the tape reel (not shown) by a photo-coupler or the like and transmits it to the microcomputer 100. The digitron 70 displays the BCD code by an eight segment display. The OSD (On Screen Display) generates a character information suitable for a standard video signal by embedding a memory having character or figure information. In the high-speed driving according to the configuration of FIG. 1, the tape is loaded on the deck unit 30 and a user's command is input through the function switch 10 or the remote controller 20. The microcomputer 100 controls the deck unit 30 and the signal processor 40 by decoding the command transmitted from the function switch 10 or the remote controller 20. In the high-speed driving, the reel motor (not shown) of the deck unit 30 travels at a predetermined double speed.

Meanwhile, the reel pulse detector 60 converts the rotation of the tape winding reel (not shown) into a corresponding pulse signal and transmits the same to the microcomputer 100. The microcomputer 100 counts the pulse signal and displays the pulse signal through the digitron 70 or the OSD 80.

2 is a flowchart showing a reproduction method according to the present invention. First, the command of the function switch 10 or the remote controller 20 is decoded to determine whether high-speed driving (FF / REW) is performed. If it is not the high-speed driving instruction, the process proceeds to step 330 to execute a routine suitable for the selected operation. (200 steps)

Performs high speed driving (FF / REW) operation (step 210).

Check if the memory key is set. If the memory key is set, the process proceeds to step 310 to perform a memory key function (step 220).

If the memory key is not specified in step 220, it is checked whether a numerical value S for designating a stop position is input from the remote controller 20. If the numerical value S specifying the stop position is not input, the process proceeds to step 280 (step 230).

The numerical value S specifying the stop position is stored in the memory (step 240).

The sensor unit 50 is monitored to check whether the tape end or end is reached. If the end or end of the tape is detected, the process proceeds to step 280 (step 250).

It is determined whether or not the numerical value S specifying the stop position and the value C obtained by counting the pulses from the reel pulse detector 60 coincide. If it does not match, the process returns to step 250 (step 260).

If the numerical value S specifying the stop position coincides with the counted value C, the deck unit 30 and the signal processing unit 40 are controlled to switch to the normal playback operation (step 270).

Judge the tape. If it is not the end of the tape, go to step 300 (step 280).

Perform AUTO REW operation (step 290).

Judge the tape tip. If it is not the end of the tape, go to step 230 (step 300).

The tape stops running (step 310).

It is determined whether the value obtained by counting the pulses in the reel pulse detection unit 60 is 0. If not 0, return to step 210; if 0, go to step 270 (step 320).

As described above, the high speed driving control method of the present invention sets the stop position during the high speed driving (FF / REW) and automatically switches to the regeneration operation when the counter value reaches the set stop position so that the user searches at an arbitrary position. Has the advantage of making it possible.

In addition, the present invention ensures the convenience of operation by eliminating troublesome key operation by automatically switching to the reproduction operation at the stop position.

In addition, the present invention checks whether or not the memory key can be used in parallel with the conventional memory key function. In addition, the present invention increases convenience of use by automatically switching to playback operation at a designated point by the memory key function.

Claims (1)

A fast running control method of a magnetic tape recording / reproducing apparatus having a counter, comprising: performing a fast forward (FF) or a fast reverse (REW); Detecting the current position (C) of the tape; Setting a stop position (S); And a step of switching to a current playback (PLAY) at a point where the counter value of the current position (C) and the stop position (M) coincide.