KR19990004715A - Iterative playback control method according to sound level discrimination of video tape - Google Patents

Abstract

According to the present invention, when the video tape recorder plays a video tape containing a program in which the silent section is repeated, the tape section having the sound section between the silent sections is detected by detecting the silent section by determining the sound level of the video tape. A repeat playback control method according to sound level determination of a video tape capable of repeating playback of a video tape is provided.

To this end, the present invention compares the voice level of the voice signal read from the videotape, detects the position of the silent section, and adds and stores the counting value for the detected current silent section and the preset silent setting value. A first step and a second step of searching for the silent section according to the stored counting value and performing the repeated playback if the repeat playback function is set in the playback period before another silent section is detected in the silent section detection state; When the release of the repeat playback function is set, it is characterized in that it comprises a third step to achieve a normal playback function.

Description

Iterative playback control method according to sound level discrimination of video tape

The present invention relates to a repetitive playback control method according to sound level determination of a video tape, and more particularly, to a silent section by discriminating a sound level when playing a video tape in which a silent section such as a language school program is repeated in a video tape recorder. When the detection is detected, the present invention relates to a repetitive playback control method according to the audio level determination of video tapes for reproducing and reproducing a tape section having sound sections between each silent section.

As is well known, information is recorded by recording video / audio information on a recording medium coated with a magnetic material such as a video tape, and reading information tracks on a recording medium on which the video / audio information is recorded. A video tape recorder is adopted as a means for reading / reproducing a signal. A video tape is typically used by a video signal of a broadcasting signal or a video / audio information introduced from an external video device using a magnetic head magnetization. In the case of recording on the recording surface, the erasing current for erasing the already recorded information signal and the recording current by the video / audio information can be applied together.

In such a video tape recorder, when a matrix button portion provided in a predetermined portion of a remote controller for remote control or a main body of the main unit is operated, and a function instruction for playing a video tape is issued, the tape transfer mechanism transfers the recording surface of the video tape for playback. As the magnetic head reproduces the recorded video and audio signals, the signal processing operation is performed by the reproduction signal processing unit, and then the image is output on the screen of the television through the signal output unit and the audio can be output through the speaker. On the other hand, if there is a function command for recording operation, the recording signal processing unit performs signal processing on the video signal from a predetermined external video source and the television broadcast signal of a predetermined channel tuned by a tuner. Recording on the recording surface of video tape by magnetic head It is yahal so that a video signal and an audio signal can be recorded.

In addition, the video tape recorder is provided with a capstan servo function for driving the video tape conveyed by the tape transfer mechanism according to the constant speed or variable speed function by driving the capstan motor, and a plurality of magnetic heads for recording and reproduction. A drum servo function is provided to rotate the rotating drum at the correct speed. The capstan servo function controls the running speed and position of the tape that is running during the playback of the video tape. While tracking control is performed to properly scan the image on the drum, the drum servo function not only keeps the rotational speed of the rotating drum constant at all times in order to suppress the time axis fluctuation of the reproduced video signal, but also the synchronization signal separated from the video signal. The rotation of the drum is less based on the phase of That is to occur.

On the other hand, in such a video tape recorder, a repetitive playback section is determined according to a user's key operation when playing a video tape including a video program requiring repetitive playback such as a language learning program, thereby enabling an automatic repeat playback operation. When the user enters a setting operation while counting the pulses of the control signal recorded on the control track of the video tape, the counting value of each control pulse is memorized, and when there is a key input for the final repeat play, It is possible to repeatedly play back the tape section corresponding to the stored counting value.

In addition, according to another automatic repeat play function for video tape, when a key input is made to execute a repeat play function for a predetermined tape section, a tape corresponding to a preset repeat play time from the tape position at which the key input is made. The section is retracted so that it can be played repeatedly.

However, in the automatic repeat playback function of such a video tape recorder, in the case of the method of repeating playback based on the counted value of the pulse of the control signal recorded on the control track, it is necessary to set the start section to the end section of the repeat playback. It is disadvantageous that two key operations are required, which is cumbersome, and in the case of a method of repetitively playing back a tape section corresponding to a preset repeat playback time, it is difficult to set a start position of a desired repeat playback section.

Accordingly, the present invention has been made in view of the above circumstances, and when the video tape recorder plays a video tape containing a program in which the silent section is repeated, the silent section is detected by determining the sound level of the video tape. It is an object of the present invention to provide a repetitive playback control method according to sound level determination of a video tape, which enables repetitive reproduction of a tape section having sound sections between silent sections.

In order to achieve the above object, according to the repetitive playback control method according to the sound level determination of the video tape according to the present invention, if the position of the silent section is detected by comparing the sound level of the sound signal read from the video tape, In the first step of adding and storing the counted value for the current silent section and the preset silent set value, and if the repeat play function is set in the playback period before the other silent section is detected in the detection state of the silent section, In accordance with the sound level determination of the video tape consisting of a second step of repetitive playback by searching the silent section according to the stored count value, and a third step of performing a normal playback function when the release of the repeat playback function is set A repeat playback control method is provided.

According to the present invention configured as described above, when the videotape recorder plays a videotape containing a program in which a silent section is repeated, such as a predetermined language learning program, the audio level of the audio signal read out from the videotape is recorded. If a silent section is detected and the silent section is detected, the preset silent set value is added to the counting value of the silent section, and if the repeat play function is set by the user's key operation, the tape section is searched according to the stored counting value. Repeated playback is done.

1 is a block diagram showing the configuration of a video tape recorder to which a repetitive playback control method according to sound level determination of a video tape according to the present invention is applied;

2 is a schematic diagram showing a tape section which is repeatedly reproduced by detecting a silent section according to the determination of the voice level according to a preferred embodiment of the present invention;

3 is a flowchart illustrating the operation according to the preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: image reading unit, 4: image preamplification unit,

6: image demodulation processing unit, 8: audio reading unit,

10: voice preamplification part, 12: voice demodulation processing part,

14: mode switch unit, 16: video output unit,

18: audio output unit, 20: audio level comparison unit,

22: servo drive circuit, 24: capstan motor,

26: drum motor, 28: function setting section,

30: data memory, 32: timer,

34: control unit.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a configuration of a video tape recorder to which a repetitive playback control method according to sound level determination of a video tape according to the present invention is applied. In FIG. The image reading part which consists of a head drum and reads the image information signal contained in the video track of a video tape, 4 shows the image preamplification part which pre-amplifies the image information signal read out from the said image reading part 2, 6 Denotes an image demodulation processing unit for demodulating the preamplified image information signal to enable image reproduction.

Further, reference numeral 8 denotes an audio reading unit for reading audio signals recorded on audio tracks of a video tape, which is composed of an audio head provided separately from the head drum constituting the image reading unit 2, and 10 denotes the video. A voice preamplification unit for preamplifying the voice signal read out from the tape, and 12 denotes a sound line demodulation processing unit for demodulating the preamplified voice signal to enable voice reproduction.

Reference numeral 14 denotes a mode switching for reproducing the video information signal and the audio signal under the switching control from the control unit 34 to be described later or for reproducing the video / audio signal according to the television broadcast tuned from the tuner. The mode switching switch part which performs a switching operation is shown.

Reference numeral 16 denotes an image output unit which performs amplification driving for outputting the image signal passing through the mode switching switch unit 14 to an image output apparatus such as a television, and 18 denotes the mode switching switch unit 14. An audio output section which performs amplification driving for outputting the passed audio signal to the audio output device side such as a television or an audio system.

Reference numeral 20 denotes a voice level comparator for generating a level comparison signal by comparing the voice levels with respect to the voice signal from the video tape applied to the voice demodulation processor 12.

Reference numeral 22 denotes a servo drive circuit section for performing servo control for normal playback of videotape or repetitive playback for a predetermined tape section by servo control of the control unit 34, which will be described later, and 24 denotes the servo drive circuit section 22. ) Represents a capstan motor that performs a rotational operation for driving the video tape by servo control, and 26 denotes to rotate the head drum provided with the image reading unit 2 by servo control of the servo driving circuit unit 22. A drum motor for performing a motor operation for the same.

Reference numeral 28 is a matrix button unit provided in a predetermined portion of the remote control remote control unit or the control panel of the main body to set the repeat play function for a predetermined video tape by a single key operation, and to execute the repeat play function. A function setting section for performing a key operation for releasing the signal.

Further, reference numeral 30 denotes a data memory for storing the counting value for the silent section detected by the sound level determination operation of the video tape and the addition value of the preset silent setting value, and 32 is reproduced when the video tape is reproduced. A timer for counting clock pulses in response to a tape section is shown.

Further, reference numeral 34 denotes from the sound level comparison unit 20 in a state in which a counting operation is started by the timer 32 when a video tape containing a program in which a silent section is repeated, such as a language learning program, is reproduced. When a predetermined silent section is detected according to the level comparison signal of, the counting value for the silent section is added to the preset silent setting value and stored in the data memory 30, and the function setting unit 28 is capable of repeating playback. When the key is inputted for the execution of the data, the servo drive circuit 22 performs the rewinding operation of the video tape by the capstan motor 24 based on the counting value stored in the data memory 30. The control unit controls to perform repetitive playback.

Here, as shown in FIG. 2, the control unit 34 previews the corresponding counting value after a predetermined set time T has elapsed in the silent section detected by the level comparison signal from the voice level comparing unit 20. In addition to the counting time according to the set silent setting value, the start periods t1 and t2 of repetitive reproduction are stored in the data memory 30.

In addition, if another silent section is detected before the repeat play function is set in the silent section detection state, the controller 34 repeats the counting value of the previously stored silent section according to the first embodiment of the present invention. If the repetitive playback function is set by the function setting section 28 by erasing the start time period t1 of reproduction and updating and storing the start time period t2 according to the count value of the detected other silent section. The tape section (b) corresponding to the update stored start period t2 is repeatedly played.

On the other hand, if another silent section is detected before the repeat play function is set in the silent section detection state, the control section 34 starts by counting the previously stored silent section according to another embodiment of the present invention. While maintaining the storage state for the period t1, the starting period t2 by the counting value of the detected other silent section is further stored, and the repeat playback function set by the function setting section 28 is set. In this case, the tape section having the sound section (a, b) can be repeatedly reproduced from the stored start periods t1 and t2.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 3.

First, in the case where a video tape including a program in which a silent section is repeated, such as a language school program, is played in step 40, the process proceeds to step 41, and the control unit 34 controls the voice signal of the voice level comparison unit 20. It is determined whether the silent section is detected through the level comparison signal according to the voice level comparison result.

As a result of the determination in step 41, if it is determined that the silent section for the voice signal is detected, the control proceeds to step 42, and whether the time for which the detection state of the silent section is maintained has elapsed to the set time T. Judge.

As a result of the determination in step 42, when it is determined that the detection time of the silent section has elapsed to the set time T, control proceeds to step 43, in which the counting value of the silent section indicated by the timer 32 and the counting value are previously determined. The set silent setting value is added to store the start period t1 of repetitive reproduction in the data memory 30.

In that state, the flow advances to step 44, and the control section 34 determines whether or not the function setting section 28 key-sets a repeat playback function for the tape section following the stored start period t1.

As a result of the determination in step 44, when it is determined that the function setting section 28 is key setting the repeat playback function, the control proceeds to step 45 to control the servo drive circuit section 22 to control the data memory 30. The rewinding operation of the tape section corresponding to the start period t1 of the repetitive reproduction stored in the subfield is performed, and then the repetitive reproduction is performed based on the start period t1.

Herein, the control section 34 sets the function in a state in which the start period t1 of repetitive playback is calculated and stored in the data memory 30 according to a predetermined silent section determination according to the first embodiment of the present invention. If the start period t2 corresponding to the detection of another silent section is calculated while the key setting operation for executing the repeat playback function by the section 28 is not performed, the start period already stored in the data memory 30 is calculated. (t1) is erased, the start period t2 according to the detection of another silent section is updated and stored, and when the setting for the repeat playback function is made by the function setting unit 28, the update start period t2 is stored. Repeat playback on the basis of.

In addition, the controller 34 sets the function in a state in which the start period t1 of repetitive playback is calculated and stored in the data memory 30 according to a predetermined silent section determination according to the second embodiment of the present invention. If the start period t2 corresponding to the detection of another silent section is calculated while the key setting operation for executing the repeat playback function by the section 28 is not performed, the start period already stored in the data memory 30 is calculated. The start period t2 according to another silent section is additionally stored for (t1), and when the repeat play function is set by the function setting unit 28, the sound period starts from the stored start periods t1 and t2. All repetitive playback of the tape section with (A) and (B) is performed.

In that state, the flow advances to step 46, and the control unit 34 determines whether or not key setting for releasing the execution state of the repeat playback function is made by the function setting unit 28.

As a result of the determination in step 46, if it is determined that the key setting for releasing the repeat playback function is made, the function setting unit 28 proceeds to step 47 for the tape section after the repeat playback is performed. Allow normal playback.

According to the present invention made as described above, when the video tape recorder plays a video tape in which the silent section is repeated, if the repeat play function is executed while detecting the silent section of the video tape, the detected silent section is detected. By allowing repetitive reproduction from the above, the user does not need to repeat a plurality of key operations, but also has an advantage that a more accurate repetitive reproduction of a tape section can be achieved.

Claims (3)

A first step of adding and storing a counting value for the detected current silent section and a preset silent setting value when the position of the silent section is detected by comparing the speech levels with respect to the audio signal read from the video tape; A second step of searching for a silent section according to the stored counting value and repeating playback if the repeating playback function is set in a playback period before another silent section is detected in the silent section detection state; And reproducing the sound level of the video tape according to a third step of performing a normal play function when the release of the repeat play function is set. The method according to claim 1, wherein if another silent section is detected before the repeat play function is set in the detection section of the silent section in the second step, the counting value of the previously stored silent section is erased and the other detected silent section is detected. And the counting value of the section is updated and stored. The method according to claim 1, wherein if another silent section is detected before the repeat play function is set in the silent section detection state in the second step, the memory state of the counting value previously stored is maintained. And repetitively storing the counted values of the detected other silent sections.