KR100226968B1 - Method for reproducing data repeatedly in the dvd system - Google Patents

Abstract

The present invention relates to a repetitive reproducing method of performing repetitive reproducing processing to always reproduce subtitle information when there is subtitle information corresponding to a repetitively reproduced image in a digital video disc (DVD) system. The repeated playback method may further include: storing starting point information of the read caption information when the caption information is read while the repeat key is not controlled and being played; Setting a repetitive reproducing section if the repetitive key is controlled and reproducing while the reproducing reproducing section is not set; If an end point of the repeating playback section is set, checking whether start point information of the corresponding caption information is stored; If the start point information of the subtitle information is stored as a result of the check, searching and reading the start point position of the subtitle information, and if the end point of the subtitle information is detected, searching and reproducing the repetitive playback section is performed. do.

Description

D.V.D. Repeat playback method in system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repeat playback method in a digital video disk system (hereinafter, abbreviated as DVD), and to a method of repeating playback including subtitle information (sometimes referred to as OSD). It is about.

In general, a DVD is a medium configured to provide digital moving image information. As shown in FIG. 1, a DVD stores an information storage (or recording) area as a lead in area, a data area, and a lead out area. The information is stored separately. DVDs constructed as described above have a capacity of about 4.7G bits, and can contain video information, voice information, and subtitle information of one movie on one disc. In particular, the caption information may be included so that the information can be provided in multiple languages. Generally, the caption information is stored in a predetermined section before the start point of the section in which the corresponding video information is included. For example, "Hi. When the information "I am ○○○" is subtitle information displayed while the 4-frame image is being played back, the above-mentioned subtitle information is stored in a predetermined area before the start point of the section in which the 4-frame image is loaded.

In addition, in order for the subtitle information to be provided to be expressed in two or more languages, that is, the subtitle information of the same content can be displayed in one of Korean, English and other languages. As described above, the caption information is generally stored in all the predetermined areas before the start point of the section in which the corresponding video is loaded. However, in order to extract the subtitle information expressed in the relevant Korean language in such a multilingual manner, a method of recording the special code information of the corresponding language for each subtitle information is used.

When the caption information expressed in multiple languages is recorded as described above, the user can select the corresponding language of the caption information to be displayed. Such selection is performed by the first track (or the first file recording area, F0) of the data area shown in FIG. This is done using the special information contained in).

As described above, the information stored in the track 0 is used to display the caption information corresponding to the desired language among the caption information contained in the predetermined data area as described above, and the user can play the program stored in the data area. When attempting to repeat (Repeat) playback, there was a problem that the existing subtitle information cannot be displayed because only the specified section is to be played again.

For example, as shown in FIG. 2, when the subtitle information for the video signal section V composed of several frames is recorded in section ②, when point A and point B are designated as the repeat playback section, point A to point B are as follows. Only the information recorded up to and including the subtitle information is reproduced again, the section (2) is not reproduced, so only the image is repeatedly played without displaying the subtitle information.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks. In the digital video disc (DVD) system, the subtitle information can always be reproduced when there is subtitle information corresponding to the image to be repeatedly reproduced during the repetitive playback control. The present invention provides a repetitive reproducing method for repetitive reproducing.

Another object of the present invention is to provide a subtitle information in a repetitive playback section specified in the repetitive playback control in a DVD system. The present invention provides a repetitive reproducing method of performing repetitive reproducing process.

In order to achieve the above object, the repetitive playback method according to the present invention is a digital video disc system having a function of performing repetitive playback of a predetermined section of a disc by using a repetition key during reproduction. Checking the first step; As a result of performing the first check step, a second check step of checking whether the system is playing if the repetition key is not controlled and checking whether there is subtitle information read from the disc if playing; A first storage step of storing starting point information of the currently read caption information if the caption information exists as a result of performing the second check step; A third check step of checking whether there is a starting point information for the predetermined section when the repeating key is controlled as a result of performing the first checking step; if the starting point information does not exist, specifying a current playback time A second storing step of storing the starting point information of the section; A fourth checking step of checking whether there is subtitle information for the reproduced video information; A third storage step of storing the information stored in the first storage step as starting point information of the subtitle information when the subtitle information is present as a result of performing the fourth check step; When the subtitle information does not exist or the second storage step is completed, a first reproduction processing step of performing a reproduction process on the disc; when a start point information on a predetermined section exists. A fourth storing step of storing the current playback time point as end point information for the predetermined section in the second step; A fifth checking step of checking whether there is a starting point information for the subtitle information stored in the third storing step; A first search step of searching for a start point position of the caption information on the disc with reference to the start point information when the start point information on the caption information exists as a result of performing the fifth check step; Reading subtitle information searched in the first search step; When the end point of the read caption information is detected in the reading step, a second playback processing step of searching for the starting point of the predetermined section and performing repeated playback processing for the predetermined section is performed.

1 is a data format diagram of a general DVD

2 is a schematic functional block diagram of a DVD system for performing a repeat playback method according to the present invention;

3 is a flowchart of a repeat playback method according to the present invention.

4 is a conceptual diagram of a repeat playback method according to the present invention;

Explanation of symbols for main parts of the drawings

300: disc 310: key input unit

320: control unit 330: DVD player

331: deck portion 332: digital signal processing unit

333: decoder 334: video signal processing unit

335: audio signal processing unit 340: memory

350: subtitle information processing unit 360: video output unit

370: speaker

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

Hereinafter, an embodiment of the present invention for achieving the above object in detail.

3 is a schematic functional block diagram of a digital video disc system (hereinafter referred to as DVD) system for performing a repetitive playback method according to the present invention. The disc 300 includes information for providing subtitle information, and a user. Key input unit 310 for applying the command of the control unit, Control unit 320 for controlling the overall function of the DVD system, DVD player 330 for the playback process for the disc 300, Play of the DVD player 330 The memory 340 for storing the information on the subtitle information read in the F0 region of FIG. 1 by the control unit 320 to perform a mixing process for the video information and the subtitle information output from the DVD player 330 The caption information processor 350 includes an image output unit 360 for displaying a video signal mixed with the caption information, and a speaker 370 for outputting an audio signal output from the DVD player 330.

In particular, the DVD player 330 is controlled by the control unit 320 to control the drive of the disc 300, the deck unit 331 for picking up and outputting information, digital video and audio information output from the deck unit 331 The digital signal processor 332 and the digital signal processor 332, which perform signal processing, decode and output the video and audio signals in order to extend the subtitle information read in the F0 region shown in FIG. The decoder 333 transmits the code information of each country to the memory 340 and decodes and outputs only the subtitle information expressed in the corresponding language among the subtitle information read out from the data area except F0 by the control signal provided from the control unit 320. The video signal output from the decoder 333 is converted into R (Red), G (Green), and B (Blue) signals, and converted into a composite video signal and output to the video signal processor 334 and the decoder 333. Emitter converts the audio signal to be output to an analog signal and is composed of an audio signal processing unit 335 for processing to be output through the speaker 370.

4 is a flowchart of a repetitive playback method in the DVD system according to the present invention.

3 will be described in detail with respect to the operation of the repeated playback method according to the present invention shown in FIG.

Prior to the description, a process of enabling a user to play caption information expressed in a desired language when the caption information of multiple countries is recorded on the disc 300 will be described briefly as follows. That is, when the playback mode is controlled by the control unit 320 and the deck unit 331 picks up the F0 (see Fig. 1) track on the disc 300, the picked-up information is passed through the digital signal processor 332 to the decoder ( Decoded at 333. At this time, the decoder 333 is configured to perform decompression processing by the Moving Picture Expert Group (MPEG) method. Of the decoded information, special code information about subtitle information expressed in languages of each country on the disc 300 is transmitted to the memory 340. The memory 340 provides the special code information of each station that the control unit 320 has stored upon request to the control unit 320, and the control unit 320 displays the special code information in a menu manner to display a country that the user wants to display. Allows you to choose a code.

When a country code desired for display is selected through the above process, the controller 320 provides the corresponding country code information to the decoder 333, and the decoder 333 of the subtitle information read out during reproduction of the data area except the F0 area. Only the subtitle information expressed in the relevant country is decoded and output.

As described above, when the control unit 320 of the DVD system to which the playback process is performed checks whether the repeat key is controlled through the key input unit 310 in step 401, and if the repeat key is not controlled, the control unit 320 may be used. Proceed to the step to check if the DVD system is currently playing. Returned if the check result is not playing. If it is playing, however, the flow proceeds to step 403 to check whether the caption information is being read. At this time, the read check on the caption information is performed by the decoding result of the decoder 333. As a result of the check, if it is not read, it is returned. If it is read, the process proceeds to step 404 where the starting point information of the currently read caption information is stored and returned.

On the other hand, if it is determined in step 401 that the repetition key is controlled, the process proceeds to step 405. In step 405, the controller 320 checks whether the DVD system is currently being played. If the result is a check, it is returned. However, if playback is in progress, the flow advances to step 406 to check whether a point A as shown in FIG. 2 exists. Here, the point A is a repeat playback start point as shown in FIG.

As a result of the check, if point A does not exist, the operation proceeds to step 407, and the current position is stored as the point A, and the operation proceeds to step 408 to check whether there is subtitle information of the reproduced video. If there is a check result, the process proceeds to step 409 and the information stored in step 404 is read and stored as starting point information of the corresponding subtitle information. The flow proceeds to step 410 to perform the playback process continuously and returns. However, as a result of checking in step 408, if the caption information does not exist, the process proceeds to step 410, and continues the playback process and returns.

As a result of checking in step 406, if point A does not exist, the process proceeds to step 411, and the current position is stored as point B shown in FIG. In step 412, it is checked whether caption information exists in a video currently being played. As a result of the check, in step 413, the subtitle information is searched by referring to the start information of the corresponding subtitle information stored in step 409 (see ① in FIG. 2). The caption information is read out until the end point is detected (see ② in FIG. 2). If the end point of the caption information is detected, the process proceeds from step 415 to step 416 to search for point A (see ③ in FIG. 2). However, if the subtitle information does not exist as a result of checking in step 412, the process proceeds directly to step 416 to search for point A. When the point A is searched, the process proceeds to step 417 to repeatedly play the section A-B shown in FIG. 2, and the caption information processing unit 350 is driven to be displayed with the caption information read out during playback.

As described above, the present invention provides subtitle information to be reproduced even when there is subtitle information for a video signal in a repetitive reproducing section designated during reproducing in a DVD system, but the subtitle information storage section is not included in the corresponding section. By providing a repetitive reproduction method, there is an advantage that it is possible to prevent the case that the subtitle information is not reproduced during the repeated reproduction.

Although the present invention has been described as the above-described embodiment, those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (2)

In a digital video disc system having a function of performing repeat play for a predetermined section of a disc by using a repeat key during playback, A first checking step of checking whether the repeat key is controlled; A second checking step of checking whether the system is playing if the repeat key is not controlled as a result of performing the first checking step and checking whether there is subtitle information read from the disk if playing; A first storage step of storing starting point information of the currently read caption information if the caption information exists as a result of performing the second check step; A third checking step of checking whether the starting point information for the predetermined section exists when the repeating key is controlled as a result of performing the first checking step; A second storage step of storing a current playback time point as start point information of the predetermined section when the start point information does not exist as a result of performing the third check step; A fourth checking step of checking whether there is subtitle information for the played video information; A third storage step of storing the information stored in the first storage step as starting point information of the corresponding subtitle information when the subtitle information exists as a result of performing the fourth check step; A first playback processing step of performing a playback process on the disc when the subtitle information does not exist or the second storage step is completed as a result of performing the fourth check step; A fourth storing step of storing a current playback time point as end point information for the predetermined section when the start point information for the predetermined section exists as a result of performing the third check step; A fifth checking step of checking whether there is a starting point information for the caption information stored in the third storing step; A first search step of searching for a start point position of the caption information on the disc with reference to the start point information when the start point information of the caption information exists as a result of performing the fifth check step; Reading caption information searched in the first search step; And a second playback processing step of searching for a starting point of the predetermined section and performing a repeated playback process for the predetermined section when the end point of the subtitle information read out in the reading step is detected. V. D. Iterative playback method in system. The method as claimed in claim 1, wherein the repetitive reproducing method performs the second reproducing process by searching the start point of the predetermined section immediately if there is no starting point information for the caption information as a result of performing the fifth check step. D.V.D., further comprising steps. Iterative playback method in system.

Images