KR19990040717A - Automatic Repeat Playback Method Using Control Pulse of VSI System - Google Patents

Abstract

The present invention relates to an automatic repetitive reproducing method using a control pulse of a VSI system, wherein a control pulse regenerated from a control head is counted and stored during a repetitive reproducing period designated by an automatic repetitive key during reproducing. By replaying a predetermined number of times by using a count value, it is possible to accurately find the starting point of the designated repeating section without error during rewinding.

To this end, the present invention provides a method for up-counting the control pulse read from the control head until the automatic repeat key is input again while the start point of the section to be repeatedly played is designated by the automatic repeat key during playback. Stage 1; A second step of storing in the memory means the number of control pulses counted up to that time when the automatic repeat key is input again in the first step and the end point of the section to be repeatedly played is designated; After executing the second step, down-count the number of control pulses, rewind until the count value becomes zero, and then up-count the control pulses again to the point where the number of control pulses already stored is counted. And executing a regeneration mode in a third step of automatically repeating the specified number of times.

Description

Automatic Repeat Playback Method Using Control Pulse of VSI System

The present invention relates to a method for counting and storing control pulses for repetitive reproducing sections designated by a user when reproducing VSI, and to control an automatic repetitive reproducing operation in the corresponding section. If the start point of the section to be repeated is designated by the user, the status is displayed on the OSD screen, and the control pulse separated from the video playback signal is counted. Then, if the end point of the section to be repeated is designated by the automatic repeat key again, The number of control pulses that have been counted is stored, and then the automatic repeat operation is performed from the point at which the count value of the control pulse becomes zero to the memorized count value by the designated number of times. VSI makes it easy to find the starting point without error The present invention relates to an automatic repeat play method using a control pulse of a stem.

In general, a VSI system includes a recording / reproducing unit including a video head and an audio head to record or reproduce a video signal and an audio signal provided from a tuner circuit or a line input terminal as shown in FIG. 10) and a video signal processing unit 20 for separating and processing the broadcast signal tuned by the tuner circuit or the video signal reproduced from the tape of the recording / reproducing unit into a luminance signal and a color signal, respectively, and a control pulse from the video signal. It includes a vertical synchronous separation unit 21 for separating and providing to the microprocessor, and the OSD processing unit 30 for generating the OSD character in accordance with the control signal of the microprocessor to output to the video output.

And a key input unit 40 having a plurality of digit keys, function keys, and automatic repeat keys to allow a user to set a repeat play function, control deck operation according to the key input signal, process video / audio signals, and OSD. A microprocessor 70 for controlling character generation; a memory unit 50 for storing counter data during tape playback and channel numbers during automatic channel search; and a deck for driving the deck mechanism in accordance with a control signal of the microprocessor. The drive part 60 is provided.

FIG. 2 is a block diagram schematically showing an embodiment of a circuit configuration for detecting a control pulse, and includes amplification for amplifying a minute control pulse reproduced from the control head 11 to a predetermined level that can be recognized by a microprocessor. It can be seen that the unit 61 and the inverting unit 62 for detecting and inverting the negative control pulse.

3 is a cross-sectional view for explaining a signal recording state on a tape. The control head, the audio head, and the video heads provided in the recording / reproducing section 10 have a control track under the tape as shown in the figure. During the recording and playback operation, a control pulse that is a reference signal is planted. An audio signal is recorded in the audio track on the upper part of the tape, and a plurality of video tracks in which the video signal is recorded in the middle of the tape have a predetermined angle. This indicates that the track is constructed to hold the track.

FIG. 4 is a waveform diagram showing various signals used in each part of the VSI system, which shows a control pulse CTL, a vertical synchronizing signal V.SYNC, and a switching pulse waveform SW.PULSE.

In the repeated playback operation performed in the conventional VSI system having such a configuration, when the automatic repeat key is input through the key input unit 40 while the playback mode is in operation, the microprocessor 70 starts repeating playback of the tape count value at that time. At the point where the memory unit 50 is stored as a point, and the automatic repeat key is input again later, the tape count value at that time is stored in the memory unit 50 as the end point of the repeated playback, and the playback starts while checking the tape count value. By returning the tape to the point, the playback operation from the start point to the end point of the corresponding section is executed. After the playback operation is executed for the designated number of times, the normal playback mode is executed again.

However, in the VSI system that repeats the play using the tape count value as described above, the tape error does not stop exactly at the actual starting point due to a counter error, but stops after a little more than the starting point. As the number of repetitions increases, or when the tape driving mode is recorded and recorded in the constant speed mode and the double speed mode, or in the constant speed mode and the triple speed mode, there is a problem that the counter error as described above becomes larger during playback.

Therefore, the present invention was created to solve the above problems, the present invention is a control head while displaying a message on the OSD screen indicating that the automatic repeat start point is specified when the start point of the section to be repeated playback by the automatic repeat key When the control pulse picked up from the device is counted and the end point of the section to be repeatedly played by the automatic repeat key is specified again, the automatic repeat play operation is performed by the designated number of times using the number of control pulses counted up to that time, thereby repeating play. It is an object of the present invention to provide an automatic repetitive reproducing method using a control pulse of a VSI system capable of accurately finding and reproducing a starting point of a specified repetition section without error when performing rewinding.

In order to achieve the above object, the present invention, when the start point of the section to be repeatedly played by the automatic repeat key is designated during playback, displays the state on the OSD screen, and the control pulse picked up from the control head until the automatic repeat key is input again. A first step of up-counting; A second step of storing, in the memory means, the number of control pulses counted up to that time when the end point of the section to be repeatedly played back is input again when the automatic repeat key is input again in the first step; After performing the second step, down-count the number of control pulses, rewind until the count value becomes zero, and then control which has already been stored while up-counting the number of control pulses picked up from the control head. There is provided a method for automatically repeating playback using a control pulse of a VSI system comprising a third step of automatically repeating the execution of the playback mode up to a point where the number of pulses is counted.

1 is a block diagram schematically showing some components of a VSI system for explaining the present invention.

2 is a block diagram of a control pulse detection circuit;

3 is a cross-sectional view of the tape for explaining a signal recording state on the tape;

FIG. 4 is a waveform diagram illustrating various signals used in each part of the VSI system. FIG.

5 is an operation flowchart for explaining an automatic repetitive reproducing method using a control pulse of a VSI system according to the present invention

** Explanation of symbols for the main parts of the drawings **

10: recording / playback section 11: control head

20: video signal processing unit 21: vertical synchronization separation unit

30: OSD processing section 40: key input section

50: memory unit 60: deck drive unit

61: amplification section 62: inverting section

70: microprocessor

Hereinafter, an automatic repeat reproducing method using a control pulse of a VSI system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a flowchart illustrating an automatic repetitive reproducing method using a control pulse of a VSI system according to the present invention. The microprocessor 70 of FIG. 2 uses a control pulse picked up from the control head 11. The overall flow of the automatic repeat playback operation to be performed is shown.

In the above operation flow, if a start point of a section to be repeatedly played in a reproducing state is designated, a first step (S211-S215) of up-counting the control pulse picked up from the control head while displaying the state on the OSD screen, and thereafter, If the end point of the section to be repeatedly played is designated, the second step (S216) of storing the count value of the control pulse up to that time, and the tape is already stored by returning the tape to the start point of the section to be repeatedly played based on the count value of the control pulse. The reproducing operation up to the end point of the present invention can be described by dividing it into the third step S217-S222 that automatically repeats the specified number of times.

Here, the first step is to determine whether the automatic repeat key is input by checking the key input state while executing the play mode (S212, S212), and the start of the section to be repeatedly played by the automatic repeat key in the determination step. When the point is designated, displaying the state on the OSD screen (S213), up-counting the control pulse picked up from the control head at the same time as the display operation (S214), and performing the counting operation and performing the reproducing operation. While proceeding, it can be seen that step S215 is performed to continuously check the key input state to determine whether the automatic repeat key is input again.

The second step is executed when the automatic repeat key is input again in the first step and the end point of the section to be repeated is designated. The number of control pulses counted up to the present after the up-count operation is stopped is stored. It can be seen that step S216 is stored in the means.

In addition, the third step is a step of reproducing repeatedly using the control pulse count value stored in the second step, and down-counting the number of the control pulse and performing a rewinding operation until the count value becomes zero. Steps S217 and S218 and when the point at which the count value of the control pulse becomes zero is detected, executing the regeneration mode to the point where the number of control pulses already stored is counted again while counting up the number of control pulses ( S219 and S220, and when the playback is completed to the end of the designated section, it is determined whether the number of repetitive playbacks has been increased by one and the number of replays has been reproduced by the specified number of times, and it is determined whether to perform the rewind and playback operations again or end the operation according to the determination result. It can be seen that the step (S221, S222).

The operation of the present invention as described above is as follows.

First, in the present invention, when the automatic repetition key is input through the key input unit 40 while the tape reproducing mode is in progress (Y branch of S212), the microprocessor 70 recognizes the starting point as the start point of the repetitive reproducing section. The OSD processing unit 30 displays a message indicating that the auto-repeat start time point is set in OSD characters (S213).

After the pickup from the control head 11, the amplified and inverted control pulses are amplified and inverted through the amplifying unit 61 and the inverting unit 62, and the key input state is checked again (S215) and automatically repeated. When the key is input again and the end point of the repeated playback section is designated (Y branch in S215), the microprocessor 70 stops counting the control pulse and then counts the number of control pulses counted up to now. By storing the data in S216, the microprocessor 70 has the number of control pulses counted during the reproducing interval designated by the user.

Thereafter, the microprocessor 70 down-counts the number of the control pulses and controls the deck driver 60 to execute the rewind mode until the count value becomes zero (S217) to start the tape to the start point of the repeated playback section. When a point at which the count value of the control pulse becomes zero is detected during the rewinding operation as described above (Y branch in S218), the playback mode is executed again and the number of control pulses in the corresponding section is up-counted. In step S219), the count value is reproduced to the point where the number of control pulses already stored in the memory unit 50 is counted, thereby performing one regeneration operation for the specified repetition section.

Therefore, when one playback is completed to the end of the designated section as described above (Y quarter in S220), the repeat playback count counter is increased by one (S221) and compared with the specified number of times (S222) to determine whether the playback has been performed a specified number of times. If the number of repetitions is smaller than the specified number of times (N branch of S222), the process returns to the step of rewinding and executing the replaying operation. The operation ends and the normal playback mode can be executed (S223).

According to the present invention as described above, if the start point of the section to be repeatedly played by the automatic repeat key during playback is designated by the user, the count operation for the control pulse is immediately started, and then the end point of the section to be repeatedly played by the automatic repeat key again. By counting until this is specified, the automatic repeating operation is performed by the designated number of times by using the number of the control pulses, so that the starting point of the designated repetition section can be accurately and accurately visited.

Claims (1)

A first step of counting the control pulses picked up from the control head until the automatic repeat key is input again while the start point of the section to be repeatedly played by the automatic repeat key is designated during playback; A second step of storing, in the memory means, the number of control pulses counted up to that time when the end point of the section to be repeatedly played back is input again when the automatic repeat key is input again in the first step; After executing the second step, the number of control pulses is down counted and rewound until the count value becomes zero. When a point where the count value of the control pulse becomes zero is detected, the number of control pulses is again counted. A repetitive automatic reproducing method using a control pulse of a VSI system, comprising: a third step of automatically executing a reproducing mode to a point where the number of stored control pulses is counted.