KR100231646B1 - Method for repeatedly controlling reading of caption data in vcr - Google Patents

Abstract

The present invention relates to a caption data section repetition control method in a VRC capable of repeatedly playing a caption data group for a predetermined section previously reproduced based on a user's selection. Decoding caption data extracted from an image signal into original signals before modulation and converting the caption data into character data; Sequentially storing caption data decoded into character data in a frame memory having a predetermined capacity; Checking whether input of a caption data section repetition key signal according to a user operation is performed while sequentially storing the decoded caption data; When the interval repetition key signal is input, switching the playback mode of V-Cal to a pause mode; Generating a full blank signal for composing an image of one screen by using the decoded caption data stored in the frame memory; Constructing a composite image of one screen of decoded caption data based on the decoded caption data stored in the frame memory and the generated full blank signal, and displaying the composite image on the monitor for a predetermined time; And switching the pause mode to the playback mode when the display for the preset predetermined time is completed.

Description

Caption data section repetition control method in VRC

The present invention relates to a method for controlling a playback operation of a V-C. More specifically, in a V-CAL suitable for controlling a section repeat playback by using caption data carried in a vertical blanking section of a video signal in a V-CAL playback mode It relates to a caption data interval iteration control method of.

As is well known, there is a vertical blanking section for canceling vertical retrace in a video signal (e.g., NTSC television video signal) displaying an image through sequential scanning of radix and even fields. Techniques for inserting caption data (also called subtitle data) in a blanking section and displaying it in the form of an OSD image at a predetermined position in the main screen during playback (or display) are widely used.

In particular, such a technique is usefully used for video learning video tapes (eg, tapes in which English is output through a speaker and corresponding English characters are displayed on a monitor in the form of an OSD).

On the other hand, in the conventional case of language learning through the reproduction of the language learning video tape containing the caption data in the video signal, due to the lack of listening ability (hearing) of the user or for other reasons, the previously heard or previously in the OSD form It is common to see the watched data repeatedly, in which case the user was forced to repeat the previous contents through cumbersome key manipulation.

That is, according to the conventional method, when performing language learning using VRC, not only cumbersome key manipulation is required during repetitive playback of the learning video tape for doubling or sufficient recognition of the learning ability, and therefore, unnecessary unnecessary learning time is required. There was a problem that waste was caused.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, and provides a caption data section repetition control method in VRC capable of repeatedly playing back a caption data group for a predetermined section previously reproduced based on a user selection. Its purpose is to.

It is another object of the present invention to provide a caption data section repetition control method in VRC capable of automatically repeating playback of a caption data group for a predetermined section previously reproduced at a predetermined interval when a video signal carrying caption data is reproduced. have.

According to an aspect of the present invention, a reproduction video signal read out from a video tape and caption data inserted in a vertical blanking section of the reproduction video signal are extracted, and the extracted video image is extracted when the reproduction video is displayed. A method for controlling section repetition of the section data in a V-Cell system which displays caption data in a predetermined blank section of a screen of the playback video in an OSD form, wherein the caption data extracted from the playback video signal is modulated in a playback mode. A first step of decoding the original original signal and converting it into character data; A second step of sequentially storing caption data decoded into the character data in a frame memory having a predetermined capacity; A third step of checking whether input of a caption data section repetition key signal according to a user's operation is performed while sequentially storing the decoded caption data; A fourth step of switching the playback mode of the V-Cal to a pause mode when the interval repetition key signal is input as a result of the check in the third step; Generating a full blank signal for composing an image of one screen by using the decoded caption data stored in the frame memory; A sixth step of constructing a composite image of one screen of the decoded caption data based on the decoded caption data stored in the frame memory and the generated full blank signal and displaying the composite image on the monitor for a predetermined time; ; And a seventh step of switching the pause mode to the playback mode when the display for the preset predetermined time is completed.

According to another aspect of the present invention, a reproduction video signal read out from a video tape and caption data inserted in a vertical blanking section of the reproduction video signal are extracted, and the extracted video image is extracted when the reproduction video is displayed. A method for controlling section repetition of the section data in a V-Cell system which displays caption data in a predetermined blank section of a screen of the playback video in an OSD form, wherein the caption data extracted from the playback video signal is modulated in a playback mode. A first step of decoding the original original signal and converting it into character data; A second step of sequentially storing caption data decoded into the character data in a frame memory having a predetermined capacity; A third step of detecting a full state of the decoded caption data stored in the frame memory while performing the sequential storage of the decoded caption data; A fourth step of forcibly switching the playback mode of the V-Cal to a pause mode by switching to a section automatic repeat mode of caption data when the detection of the data in the third step results in full data in the frame memory; Generating a full blank signal for composing an image of one screen by using the decoded caption data stored in the frame memory; A sixth step of constructing a composite image of one screen of the decoded caption data based on the decoded caption data stored in the frame memory and the generated full blank signal and displaying the composite image on the monitor for a predetermined time; ; And a seventh step of clearing the previous playback caption data currently stored in the frame memory when the display for the preset predetermined time is completed and switching the forced pause mode to the playback mode. A caption data interval repetition control method is provided.

1 is a schematic block diagram of a typical VRC regeneration system suitable for applying a method for controlling the interval repetition of caption data according to the present invention;

2 illustrates an example of a frame memory having a structure for sequentially storing gap data of a plurality of screens according to the present invention;

FIG. 3 is a flowchart illustrating a process of controlling section repetitive reproduction of caption data in a playback mode of a VRC according to a preferred embodiment of the present invention. FIG.

<Description of the code | symbol about the principal part of drawing>

102: control block 104: deck block

106: video processing block 108: caption data extraction block

110: decoder 112: frame memory

114: blank generation block 116: synthesizer

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a schematic block diagram of a typical VRC reproduction system suitable for applying the method for controlling the interval repetition of caption data according to the present invention.

As shown in the figure, a typical VRC playback system includes a control block 102, a deck block 104, a video processing block 106, a caption data extraction block 108, a decoder 110, a frame memory 112 ), Blank generating block 114 and synthesizer 116.

Referring to FIG. 1, the control block 102 is, for example, a microprocessor which performs overall operation control of V-Cal. The control block 102 is a microprocessor which controls the playback image in the playback mode based on a user operation signal provided from a keypad (not shown). Control the drive of deck block 104 for output.

In addition, the control block 102 generates a control signal for generating a blank signal on the line L11 and outputs it to the blank generation block 114 to be described later on outputting the reproduced image according to the reproduction mode, and is extracted on the line L12. A control signal for decoding caption data is generated, and data fullness state information of the frame memory 112 provided from the decoder 110 through the line L13 is automatically generated when the caption data section is automatically repeated according to another embodiment of the present invention. See.

Furthermore, in the control block 102, when the caption data section repeat function mode is arbitrarily selected based on the user operation signal or the caption data section repeat function mode is automatically selected based on the data fullness state information on the line L13, according to the present invention. A control signal is generated on lines L11 and L12, respectively, so that the current playback mode is changed to the pause mode, and then the caption data previously played and stored in the frame memory 112 can be used to compose an image of one screen. When the caption data section repetition function mode for a predetermined time is released, the pause mode is automatically switched to the original playback mode.

On the other hand, the deck block 104 includes a video playback head, a deck, and a deck driver, although detailed illustration in the same drawing is omitted, and is driven based on a drive control signal from the control block 102, thereby providing a deck. A reproduction video signal containing caption data reproduced from a video tape mounted on the same is generated on the line L14, and the reproduction video signal on the line L14 generated here is provided to the video processing block 106 and the caption data extraction block 108. do. In this case, it is assumed that the video tape mounted on the deck is a language learning tape, and the caption data for the OSD display is carried on the video signal recorded on the deck for reproduction for convenience of explanation and enhancement of understanding.

Next, the video processing block 106 performs signal processing such as demodulation, noise removal, gain control, level amplification, etc. into the original signal with respect to the reproduced video signal on the line L14, and then converts the processed processed video signal into the line L15. The video processing block 106 is well known in the art, and thus the detailed description thereof will be omitted.

On the other hand, the caption data extraction block 108 extracts caption data from the reproduced video signal provided by the deck block 104 through the line L14, that is, caption data inserted in the vertical blanking section of the reproduced video signal to the sink panel. Based on the extracted caption data, the caption data modulated for recording is provided to the decoder 110.

On the other hand, the decoder 110 decodes the extracted modulated caption data provided by the caption data extraction block 108 into the original signal before modulation, i.e., decodes and characterizes the subtitle data, which is decoded here. The text data is stored in the frame memory 112 and provided to the synthesizer 116 via the line L16 for the text data section repeating function according to the present invention.

The decoder 110 also uses the frame memory 112 based on a control signal provided from the control block 102 via the line L12 in the caption data interval repetition function mode (a preferred embodiment of the present invention) based on user operation. The caption data of one screen amount stored in the s) is extracted and provided to the synthesizer 116 through the line L16, and the frame memory 112 is full of data in the caption data section automatic repeat function mode (an alternative embodiment of the present invention). When a state is reached, data fullness state information is generated on the line L13 and provided to the control block 102, and the frame memory is based on the control signal provided from the control block 102 via the line L12 based on the data fullness state information. Caption data of one screen amount stored in the 112 is extracted and provided to the synthesizer 116 through the line L16.

The frame memory 112 stores decoded character data, and as an example, as shown in FIG. 2, a plurality of line memories 1 each storing character information of, for example, one sentence in each line memory. n) to store one screen of text data. At this time, each line memory is a line memory in the form of a first-in, first-out buffer. For example, the frame memory is a line memory having a capacity for storing 30 sentences. Since the first stored sentence is stored in the form of discarding, a group of 30 sentences of the most recently reproduced caption data is always stored.

On the other hand, the blank generating block 114 is a predetermined portion of the displayed video screen (for example, a lower portion of the screen) in response to the control signal provided from the above-described control block 102 via the line L11 in the reproducing mode. Etc.) to generate a blank signal (i.e., horizontal and vertical synchronization signals for OSD images) for setting a blank section in which an OSD image section having a predetermined size is formed, wherein the blank signal generated is line L17. It is provided to the synthesizer 116 through.

Therefore, in the synthesizer 116, in the playback mode, the main image (main picture) is based on the reproduced video signal on the line L15, the caption data information on the line L16 (i.e., character data for the OSD) and the blank signal on the line L17. ) Will generate a composite image in which caption data is inserted in a predetermined blank section and output to the display side (not shown).

On the other hand, the blank generation block 114 is a caption data section that is executed when the caption data section repeat function mode (a preferred embodiment of the present invention) based on user operation or when the frame memory 112 is in a data full state. In response to the control signal provided from the control block 102 via the line L11 in the automatic repeat function mode (an alternative embodiment of the present invention), a full blank signal is generated for composing a whole screen of the image with caption data. To the synthesizer 116 via line L17.

As a result, the synthesizer 116 constructs an image screen composed of only the most recently reproduced caption data using the previously reproduced caption data provided through the line L16 and the full blank signal on the line L17. Since it is provided to the display side (not shown), the caption data having a screen composed of previously reproduced caption data is displayed for a predetermined time on the monitor on the display side. At this time, since the deck is in the pause mode, no playback video signal exists on the line L15.

Therefore, the user who is currently learning will be able to effectively perform visual repetitive learning for doubling the learning power.

Next, a process of performing a caption data section repetition function according to the present invention using the VR playback system having the above-described configuration will be described in detail.

FIG. 3 is a flowchart illustrating a process of controlling section repetitive reproduction of caption data in the playback mode of a VR in accordance with a preferred embodiment of the present invention.

Referring to FIG. 3, caption data inserted in a vertical blanking section of a reproduction video signal in a reproduction mode is extracted, and then decoded to convert the modulated caption data into character data (steps 302 and 304). Caption data) are sequentially stored in the frame memory 112 (step 306). At this time, the character data stored in the frame memory 112 are simultaneously output to the synthesizer 116 for synthesis with the reproduced video.

Here, the caption data storage to the frame memory 112 is sequentially performed in the form of discarding the first stored character data when each line memory is filled and the next character data is input, in which case the control block 102 In step 308, it is checked whether or not a section repeating key signal for executing the section repeating function of the previously reproduced caption data is input according to the user's operation (step 308).

If it is determined in step 308 that the interval repeat key signal is input, the control block 102 switches the current playback mode to the pause mode (step 310), and then enters the frame memory 112. A control signal is generated on lines L11 and L12, respectively, to form an image of one screen by using the stored caption data of one circular area (step 312).

As a result, the synthesizer 116 constructs an image screen composed of only the most recently reproduced caption data using the previously reproduced caption data provided through the line L16 and the full blank signal on the line L17. To the display side (not shown) for a predetermined time (e.g., 1 minute, etc.) (steps 314 and 316). Therefore, on the monitor on the display side, caption data having a screen composed of previously reproduced caption data will be displayed for a predetermined time.

Then, when the image display of one screen of the previously reproduced caption data for the predetermined time is finished, the control block 102 releases the current pause mode, switches back to the playback mode, and then returns to the next image. The playback operation is controlled to be performed (step 318).

Therefore, through the above-described process (repeating display process of the caption data group reproduced just before the playback position), users may perform effective visual repetition learning for doubling the learning ability.

On the other hand, in the above-described embodiment, the caption data extracted from the reproduced video signal and decoded are successively stored in the frame memory, and the stored caption data are sequentially stored at the moment desired by the user (that is, when the user presses the interval repeat key). Only one screen is selectively configured and displayed for a predetermined time. However, the present invention performs the section repetition function automatically according to the detection result when the caption data of one screen is filled in the frame memory. In addition, the section repeated caption data may be cleared, and then the section repeat function may be automatically performed when caption data of one screen amount is filled again.

In this case, unlike the above-described embodiment, another learning effect (particularly, systematic doubled learning ability according to periodic repetitive learning in favor of a beginner learner whose language ability is rather low) may be expected.

Meanwhile, in the above-described embodiment, the caption data section repetition function is performed by using one frame memory having a capacity of one screen, but the present invention is not necessarily limited thereto. That is, the person skilled in the art, by employing a plurality of frame memories instead of one, performs the step repetition on the caption data of a plurality of screens previously reproduced instead of the caption data of a previously reproduced amount. You can easily understand that you can.

As described above, according to the present invention, by repeatedly displaying a predetermined amount of caption data previously reproduced at the time of language learning using VRL periodically or periodically according to the user's needs, It is possible to promote effective language learning ability without unnecessary key manipulation for learning.

Claims (4)

The reproduced video signal read out from the videotape and the caption data inserted in the vertical blanking section of the reproduced video signal are extracted, and the extracted caption data is displayed in a predetermined blank section of the screen as the reproduced video when the reproduced video is displayed. In the method of controlling the interval repetition of the section data in the V-CRT system to display in the OSD form, A first step of decoding caption data extracted from the reproduced video signal into a raw signal before modulation and converting the caption data extracted from the reproduced video signal into character data in a reproduction mode; A second step of sequentially storing caption data decoded into the character data in a frame memory having a predetermined capacity; A third step of checking whether input of a caption data section repetition key signal according to a user's operation is performed while sequentially storing the decoded caption data; A fourth step of switching the playback mode of the V-Cal to a pause mode when the interval repetition key signal is input as a result of the check in the third step; Generating a full blank signal for composing an image of one screen by using the decoded caption data stored in the frame memory; A sixth step of constructing a composite image of one screen of the decoded caption data based on the decoded caption data stored in the frame memory and the generated full blank signal and displaying the composite image on the monitor for a predetermined time; ; And And a seventh step of switching the pause mode to the playback mode when the display for the predetermined predetermined time is completed. The frame memory of claim 1, wherein the frame memory includes a plurality of line memories each having caption data corresponding to one sentence, and the caption data corresponding to the first stored sentence is continuously converted into newly generated decoded caption data. Caption data section repetition control method in V-Cal characterized in that for storing the decoded caption data forming a screen of the image while updating to. The reproduced video signal read out from the videotape and the caption data inserted in the vertical blanking section of the reproduced video signal are extracted, and the extracted caption data is displayed in a predetermined blank section of the screen as the reproduced video when the reproduced video is displayed. In the method of controlling the interval repetition of the section data in the V-CRT system to display in the OSD form, A first step of decoding caption data extracted from the reproduced video signal into a raw signal before modulation and converting the caption data extracted from the reproduced video signal into character data in a reproduction mode; A second step of sequentially storing caption data decoded into the character data in a frame memory having a predetermined capacity; A third step of detecting a full state of the decoded caption data stored in the frame memory while performing the sequential storage of the decoded caption data; A fourth step of forcibly switching the playback mode of the V-Cal to a pause mode by switching to a section automatic repeat mode of caption data when the detection of the data in the third step results in full data in the frame memory; Generating a full blank signal for composing an image of one screen by using the decoded caption data stored in the frame memory; A sixth step of constructing a composite image of one screen of the decoded caption data based on the decoded caption data stored in the frame memory and the generated full blank signal and displaying the composite image on the monitor for a predetermined time; ; And When the display for the predetermined predetermined time is completed, the caption in VSR includes a seventh step of clearing the previous playback caption data currently stored in the frame memory and switching the forced pause mode to the playback mode. Data section repetition control method. 4. The method of claim 3, wherein the frame memory comprises a plurality of line memories each storing caption data corresponding to one sentence.

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