KR100951015B1 - Av controlling method of blu-ray disk java(bd-j) storage - Google Patents

Abstract

PURPOSE: An A/V control method for a blu-ray disc java storage medium is provided to rapidly reproduce a video content. CONSTITUTION: An A/V control method for a blu-ray disc java storage medium comprises the steps of: obtaining A/V reproduction information by reading a file including the A/V reproduction information directly from the blu-ray disc java storage medium; generating a user selectable menu including more than one selection item; generating a plurality of selection lists according to the selection item based on the AV reproduction information; displaying the user selectable menu on a display; displaying on the display a plurality of selection lists according to one selection item selected through a user input; and setting reproduction environment and controlling A/V reproduction based on the A/V reproduction information corresponding to the selected selection list.

Description

AV control method of Blu-ray Disc Java storage media {AV CONTROLLING METHOD OF BLU-RAY DISK JAVA (BD-J) STORAGE}

The present invention relates to an AV (audio visual) control technology of a Blu-ray Disc Java (BD-J) storage medium. In particular, a BD-ROM disc made of a Blu-ray disk java (BD-J) method based on the Java platform. Blu-ray Disc Java (BD-J) storage that provides a user interface screen to control the playback of video content by accessing the video-audio stream directly without using a Java virtual machine when playing video content from a storage medium such as AV control technology of a medium.

Blu-ray discs are next-generation optical disc storage media specifications that are read using a 405 nm blue violet semiconductor laser beam. That is, reading is performed using a light beam having a narrower wavelength interval than the 650 nm red laser light used in conventional DVDs, and up to 27 GB of data can be recorded on one side of a disc. This corresponds to 13 hours of general movie and 2 hours of high-definition (HD) TV quality.

Blu-ray chooses MPEG2 Transport Stream based on MPEG2 as its compression method, and its data transfer rate is 36Mbps, which is 4 to 5 times faster than conventional DVD-ROM. Due to the high data rate, HD broadcasts can be recorded directly from digital cameras or broadcasts without any loss of audio / video quality.

Blu-ray Disc Java (BD-J) stands for the Java platform for Blu-ray Disc players. This is because the Blu-ray Society has adopted JAVA as the underlying platform for Blu-ray Disc environments. BD-J operates on the basis of DVB-GEM, which includes the Multimedia Home Platform (DVB-MHP).

1 is a diagram schematically illustrating a process of reproducing a BD-ROM manufactured by the BD-J method through a Java virtual machine.

First, the Blu-ray player runs a BD-J Xlet application written in Java to issue processing instructions. In addition, when a BD-J Xlet application's processing command is transmitted to a Java virtual machine (JVM), the JVM interprets this to control the playback control engine of the Blu-ray Disc (BD).

In the BD-J mode, it is possible to provide much more functions and a colorful graphic environment than the menu for playing video contents provided in the conventional DVD-ROM. In other words, while viewing the video content, the user can click on the screen to enjoy related online shopping, and it is possible to implement an interactive application such as chatting with other users.

By adopting Java in the BD-ROM, it is possible to provide various functions, but it requires a lot of hardware resources for using Java and requires a high-level manpower for development in the Java environment.

Also, when the BD-ROM operating in BD-J mode is read by the Blu-ray player, the process of reading a considerable amount of Java-related classes stored in the front of the BD-ROM must be preceded. There is a problem. Some users do not need the complex menu selection environment of high-definition provided by the Java environment, so there is a problem that the complex operation processing of hardware according to Java class reading and Java virtual machine processing may be rather cumbersome.

In addition, a license from Sun Microsystems is required to use the Java virtual machine in BD-J mode, and a Philips license is required for the GEM feature. Therefore, there is a problem that the additional payment according to the above technical implementation is required to pay royalties accordingly.

An object of the present invention is to eliminate the need to read a variety of additional information for using the Java virtual machine from the BD-J ROM, thereby reducing the boot time of the disc and the preparation time for playing the video content, and without using the Java virtual machine It also provides AV control technology for Blu-ray Disc Java (BD-J) storage media that provides a user interface screen similar to that of playback-related navigation in Java.

The AV control method of the Blu-ray Disc Java storage medium according to the present invention comprises the steps of: (A) directly reading a file including the AV reproduction information from a BD-J (Blu-ray Disc Java) storage medium to obtain the AV reproduction information; (B) generating a user selection menu comprising one or more selection items; (C) generating a plurality of selection lists according to the selection items based on the AV reproduction information; (D) displaying a user selection menu via display means; (E) if one of the selection items of the user selection menu is selected through the user input means, displaying a plurality of selection lists according to the selection items through the display means; And (F) if one of the selection list is selected, controlling the reproduction environment setting and the AV reproduction based on the corresponding AV reproduction information.

In addition, in the AV control method of the Blu-ray Disc Java storage medium according to the present invention, step (A) comprises: reading a playlist file from a BD-J storage medium; Reading contents of one or more playitems included in the playlist file, and recognizing start and end times of clip file information corresponding to each playitem and playitems corresponding to each playitem in the clipfile; And acquiring a playback time corresponding to the playitem from the start time and the end time, and accumulating the playtime to calculate the actual playtime of each playitem, wherein step (B) is performed. And generating a selection item (hereinafter, referred to as an 'AV playback time selection item') having a selection list in which time points are reproduced in time order.

Also, in the AV control method of the Blu-ray Disc Java storage medium according to the present invention, in step (F), when one of the playback points listed in the selection list constituting the AV playback point selection item is selected, the playitem corresponding to the playback point is selected. Reading the included playlist file; Recognizing a playitem corresponding to a playback time included in the playlist file; Reading a clip file corresponding to the playitem and reading AV stream file time information corresponding to a start time and an end time of the playitem from the clip file; And reading the AV stream file corresponding to the clip file and reproducing the section corresponding to the AV stream file time information.

In addition, in the AV control method of the Blu-ray Disc Java storage medium according to the present invention, step (A) includes reading a playlist file from a BD-J storage medium and reading the contents of a playitem included in the playlist file; Reading a clip file corresponding to the playitem; And extracting audio information including at least one of a selectable number of audios, compression information of each audio, and language information of each audio from a clip file, wherein step (B) is based on audio information. Generating an audio selection item having a selection list for the plurality of audio settings; and, if one of the audio settings is selected, the step (F) includes: And reading and playing the corresponding audio stream.

In addition, in the AV control method of the Blu-ray Disc Java storage medium according to the present invention, step (A) includes reading a playlist file from a BD-J storage medium and reading the contents of a playitem included in the playlist file; Reading a clip file corresponding to the playitem; And extracting caption information including at least one of a selectable number of subtitles and language information of each subtitle from a clip file; Step (B) comprises: generating a subtitle selection item having a selection list for a plurality of subtitle settings based on the subtitle information; and (F) step, if one of the subtitle settings is selected, AV playback is performed. And reading out and outputting a text subtitle stream corresponding to the selected subtitle setting from the AV stream at a time.

In addition, in the AV control method of the Blu-ray Disc Java storage medium according to the present invention, step (A) comprises: reading a playlist file from a BD-J storage medium; Reading the contents of one or more playitems included in the playlist file, and recognizing start time and end time of the clip file information corresponding to each playitem and the playitem corresponding to each playitem in the clip file; Obtaining a playback time corresponding to the playitem from the start time and the end time; Recognizing the playitem having the longest playback time as one of the main videos, and classifying the main video and the featured video based on at least one of a play time of each playitem and a capacity of an AV stream file corresponding to the playitem; And calculating the actual playback time of the playitem by accumulating the playing time of the playitem classified as the feature video, and (B), the playback time of the playitem classified as the feature video is in chronological order. And generating a selection item (hereinafter, referred to as a 'featured video playback point selection item') having a selection list listed as follows.

In the AV control method of the Blu-ray Disc Java storage medium according to the present invention, step (A) reads a clip file corresponding to each playitem, and audio information and subtitle information included in the clip file are set to a predetermined standard or more. If so, classify as a main image, otherwise classify as a featured image; preferably comprises a further comprising.

Also, in the AV control method of the Blu-ray Disc Java storage medium according to the present invention, in step (F), if one of the playback points listed in the selection list constituting the selected video playback point selection item is selected, a playitem corresponding to the playback point is selected. Reading the included playlist file; Recognizing a playitem corresponding to a playback time included in the playlist file; Reading a clip file corresponding to the playitem and reading AV stream file time information corresponding to a start time and an end time of the playitem from the clip file; And reading the AV stream file corresponding to the clip file and reproducing the section corresponding to the AV stream file time information.

According to the present invention, there is no need to read a large amount of Java-related additional information stored in the BD-J storage medium in advance, so that the video content can be quickly played back.

In addition, there is an effect of providing a user interface screen similar to the playback-related navigation environment provided in the Java environment without using a Java virtual machine.

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

FIG. 2 is a diagram schematically illustrating a process of directly playing a BD-ROM manufactured by the BD-J method through an AV control method according to the present invention without using a Java virtual machine.

Unlike the method of using the BD-J Xlet application and the Java virtual machine (JVM) described above, the present invention reproduces image content by directly reading data stored in the BD-J mode without using Java.

First, a user of a Blu-ray player device inserts a BD-ROM disc produced by the BD-J method into a Blu-ray player. Or, the BD-J type BD-ROM data stored in the Blu-ray player's internal hard disk is read.

That is, the BD-ROM data may be in a form of a disk-type storage medium, but may also be stored in a data form on a storage medium of another type other than a disk.

In general, BD-ROM data has a "BDMV" directory in the root directory, and a "BDMV" directory includes a "PLAYLIST" directory, a "CLIPINF" directory, a "STREAM" directory, an "AUXDATA" directory, and a "BACKUP" directory. .

The "BDMV" directory contains a "index.bdmv" file containing the contents of the "BDMV" directory and a "MovieObject.bdmv" file containing information about one or more movie objects.

The "PLAYLIST" directory stores playlist files of the form "xxxxx.mpls" containing information about movie playlists.

The "CLIPINF" directory stores clip files of "zzzzz.clpi" type that contain clip information corresponding to the AV stream file.

The "STREAM" directory stores AV stream files of the form "zzzzz.m2ts" containing video, audio, graphics, and text subtitles. That is, data corresponding to the actual video content is stored. The clpi file and the m2ts file correspond to each other with files of the same name, and the clpi file contains clip information about the m2ts file.

In the "AUXDATA" directory, files for sounds and fonts are stored. In the "BACKUP" directory, copies of the files stored in each directory are stored.

When the Blu-ray player device starts to read the BD-J storage medium, it immediately starts to read the data portion without reading the front part of the data containing the Java class information. That is, the file containing the AV reproduction information is read directly, and the AV reproduction information is obtained therefrom.

The Blu-ray player device generates a user selection menu with reference to the acquired AV playback information. The user selection menu includes an AV playback point selection item, an audio selection item, a subtitle selection item, a special video selection item, and the like, and provides a selection menu that is similar to the user selection menu provided in the existing Java mode.

Each selection item of the user selection menu includes a plurality of selection lists based on the AV reproduction information previously obtained. That is, the Blu-ray player device acquires the AV playback information and generates a selection list according to each selection item while generating a user selection menu.

After the Blu-ray player device generates the user selection menu through the above process, the Blu-ray player device displays the user selection menu to the user.

That is, a user selection menu is displayed on the user interface screen, and when a user selects each selection item of the user selection menu, a plurality of selection lists according to the selected selection item are displayed on the screen. An example of the selection list according to each selection item is shown in Figs. 3, 5, 6 and 7 below.

In this case, the user selection menu does not need to provide a colorful graphic effect as provided by the existing Java class. In other words, BD-ROMs produced in the BD-J mode generally store various snapshots and image files in advance. In the present invention, the process of reading out this kind of data is omitted and the minimum playback time information and various options are selected. It can be implemented to provide a menu.

Finally, when the user selects one of a selection list through a remote control operation, a key operation, a mouse operation, or the like, the Blu-ray player device controls the reproduction environment setting or the AV reproduction based on the AV reproduction information previously obtained.

3 is a screen showing a selection item for selecting an AV playback time point among user selection menus according to the present invention.

In the user selection menu, AV playback point selection items, audio selection items, subtitle selection items, and special video selection items are displayed.The current user selects an AV playback point selection item, and a selection list for various playback points is displayed on the screen as a popup window. Is indicated.

The playback point selection list can be displayed in the order of C01, C02, C03, ... in chronological order, and the playback point is indicated in hours, minutes and seconds next to the playback point name so that the user can select the playback point. .

When the playback point cannot be displayed on the selection list at once, the pages are divided so that the pages can be moved forward and backward to be selected.

FIG. 4 is a diagram illustrating a method of recognizing a selection section on a playitem basis in FIG. 3.

As described above, clip information for an AV stream file having the same file name is stored in the clip file.

The clip information includes time information on the AV stream file, and thus the playback time of the video data and the audio data contained in each AV stream file can be calculated.

In addition, the playlist file includes one or more playitems, and a start point and an end point of each playitem correspond to a predetermined section in the clip file.

In this case, the playitem and the clip file do not necessarily correspond to each other in sequence, and unlike the arrangement order of the clip files, the playitem and the clip file may be arbitrarily corresponded. That is, the playlist file can be configured by editing any section in the AV stream file in any order rather than in a time series according to the selection of the BD-ROM producer.

Therefore, when the Blu-ray player device starts reading BD-ROM data of the BD-J type, the Java class information is not skipped and read, and the playlist files stored in the "PLAYLIST" directory and the clip files stored in the "CLIPINF" directory are read. Read to create an AV playback point selection item.

First, the playlist file is read from the BD-J storage medium, and the contents of the playitem included in each playlist file are read.

Then, the clip file information corresponding to each playitem is read to find a corresponding clipfile, and the playitem recognizes a start time and end time corresponding to each other in the clipfile.

Next, the playback time of each playitem is obtained from the previously recognized start time and end time, and the playback time is accumulated in order to calculate the actual playtime of each playitem.

Then, as one of the selection items of the user selection menu, a selection item having a selection list in which the playing time points of the play items calculated above are arranged in chronological order is generated. This is called an 'AV playback point selection item'.

When the user selection menu including the AV playback time selection item is displayed on the screen, the user may select the AV playback time through the input means.

Then, when the user selects one of the playback points listed in the selection list constituting the AV playback point selection item, the Blu-ray player device reads the playlist file including the playitem corresponding to the selected playback point.

Next, in the playlist file, the playitem corresponding to the previously selected playback time point is recognized, and the clip file corresponding to the playitem is read. The AV stream file time information corresponding to the start time and end time of the playitem is read from the read clip file.

Finally, by reading the AV stream file corresponding to the clip file and reproducing the section corresponding to the AV stream file time information, the video content at the playback point selected by the user is reproduced.

5 is a screen showing a selection item for selecting an audio setting among a user selection menu according to the present invention.

If an audio selection item is selected from the user selection menu displayed on the screen, a selection list for a plurality of audio settings is displayed on the screen as a popup window.

To this end, the Blu-ray player device reads the playlist file in the BD-J storage medium and reads the contents of the playitem included in the playlist file before displaying the user selection menu on the screen.

Then, the clip file corresponding to each playitem is read. At this time, the clip file stores audio information including the number of selectable audios, compression information of each audio, language information of each audio, and the like. Therefore, by extracting the audio information from the clip file, the audio information supported by the Blu-ray content currently in use can be obtained.

When the audio information is extracted, an audio selection item having a selection list for a plurality of audio settings is generated based on this. That is, only some representative settings of the possible audio settings may be implemented, or a combination of all possible audio settings may be presented.

Subsequently, when the user selects one of the audio settings constituting the selection list of the audio selection item, the audio stream corresponding to the selected audio setting is read from the AV stream file to play the audio stream during AV playback.

6 is a screen showing a selection item for selecting a subtitle setting among a user selection menu according to the present invention.

If a subtitle selection item is selected from the user selection menu displayed on the screen, a selection list for a plurality of subtitle settings is displayed on the screen in a popup window.

Subtitle information is also stored in the clip file just like audio settings. Thus, the subtitle information is obtained by reading the clip file.

To this end, the Blu-ray player device reads the playlist file in the BD-J storage medium and reads the contents of the playitem included in the playlist file before displaying the user selection menu on the screen.

Then, the clip file corresponding to each playitem is read. Then, by extracting the caption information from the clip file, the caption information supported by the currently used Blu-ray content is obtained. The subtitle information includes the number of selectable subtitles, language information of each subtitle, and the like.

When caption information is extracted, a caption selection item having a selection list for a plurality of caption settings is generated based on the caption information. In this case, as in the case of the audio setting, the subtitle may be set based on a representative language, or may be implemented to select all possible subtitle types.

Subsequently, when the user selects one of the subtitle settings constituting the selection list of the subtitle selection item, the text subtitle stream according to the selected subtitle setting is read from the AV stream file to display the subtitle during AV playback.

7 is a screen showing a selection item for selecting a playback time of a feature video among user selection menus according to the present invention.

In addition to the main video containing movies, documentaries, courses, etc., the Blu-ray content further includes a special video (or additional video) including a production, shooting, editing process, and advertisement for making the main video. have. Therefore, the playback time should be selected by dividing the main video and the special video.

In the existing method using Java, information about a playlist file, a playitem, and a clip file connected to a main video or a special video is included in Java information. Therefore, if the function is implemented through the existing Java virtual machine, there is no need to keep a separate implementation for distinguishing the main image and the special image.

However, since the present invention is an implementation method that does not use Java, it should be implemented to directly distinguish and process the main image and the featured image.

The AV playback time selection item described above with reference to FIGS. 3 and 4 corresponds to a playback time selection item of the main video, and FIG. 7 shows a playback time selection item of the featured video.

In the case of the featured video, like the main video, the playback time selection list can be displayed in the order of F01, F02, F03, ... in order of time, and the playback time is expressed in hours, minutes and seconds. In addition, when there are many playback points, a menu is constructed so that the user can go to the previous page and select the page.

To do this, first read the playlist file from the BD-J storage medium, read the contents of the playitem contained in each playlist file, and the clip file information corresponding to each playitem and each playitem in the clipfile. Recognize corresponding start and end points. Then, the playback time corresponding to each playitem is obtained from the previously recognized start time and end time.

The above is the same as the content described above with reference to FIG. 4.

Next, a process of distinguishing the main image from the featured image is required. In general, the main video has a longer playback time and a larger data capacity than the featured video. In addition, the special video does not support various audio settings and subtitle settings as provided in the main video. Therefore, the main image and the featured image are distinguished based on these differences.

First, the playitem having the longest playtime is recognized as one of the main images by referring to the playtime of each playitem previously obtained.

The main video and the special video are classified based on the playback time of each playitem and the capacity of the AV stream file corresponding to the playitem.

For example, by comparing the playback time of each playitem with the capacity of the AV stream file corresponding thereto, the main video and the special video may be distinguished by statistically classifying a group having a larger file size and a smaller group than the playback time.

Or, pattern classification that classifies two groups by finding a statistical distribution of the play time of each playitem and a statistical distribution of the capacity of the AV stream file. You can also use the method.

Alternatively, it is possible to simply set a predetermined play time criterion or file capacity criterion in advance and classify the main video and the special video according to the criterion.

In addition, since classification of the main video and the special video may be error based only on the playing time and the file size, additional audio information and subtitle information may be considered as classification criteria.

To this end, a clip file corresponding to each playitem is read, and audio information or subtitle information included in the clip file is recognized.

If the audio information and the subtitle information are provided for a predetermined criterion or more, the main image may be classified by weighting the main image. Otherwise, the audio information and subtitle information may be classified by weighting the featured video.

By applying the above classification criteria alone or in combination, the main image and the featured image are classified. It should be noted that in the classification process, it is desirable to establish a fluid criterion relative to the rest of the other playitems rather than to establish an absolute classification criterion.

In the case of the main video, the playback time selection process of the main video is performed through the process of FIG. 4 above, targeting only the playitems classified as the main video.

In the case of the featured video, the playback time of each playitem is accumulated only for the playitem classified as the featured video to calculate the actual playback time of each playitem. Then, a selection item having a selection list in which these playback points are arranged in chronological order is generated. This will be referred to as a 'selected item playback time selection item'.

As shown in FIG. 7, when a user selection menu including a selected video playback time selection item is displayed on a screen, a user may select a playback time of the featured video through an input means.

Then, when the user selects one of the playback points listed in the selection list constituting the featured video playback point selection item, the Blu-ray player device reads the playlist file including the playitem corresponding to the selected playback point.

Next, in the playlist file, the playitem corresponding to the previously selected playback time point is recognized, and the clip file corresponding to the playitem is read. The AV stream file time information corresponding to the start time and end time of the playitem is read from the read clip file.

Finally, the special video content at the playback time point selected by the user is reproduced by reading the AV stream file corresponding to the clip file and reproducing the section corresponding to the AV stream file time information.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1 is a view schematically showing a process of playing a BD-ROM made by the BD-J method through a Java virtual machine;

FIG. 2 is a view schematically showing a process of directly playing a BD-ROM made by the BD-J method through an AV control method according to the present invention without using a Java virtual machine;

3 is a screen showing a selection item for selecting an AV playback time point among user selection menus according to the present invention;

FIG. 4 is a diagram illustrating a method of recognizing a selection section on a playitem basis in FIG. 3;

5 is a screen showing a selection item for selecting an audio setting among a user selection menu according to the present invention;

6 is a screen showing a selection item for selecting a subtitle setting among a user selection menu according to the present invention;

7 is a screen showing a selection item for selecting a playback time of a feature video among user selection menus according to the present invention.

Claims (8)

delete (A) directly reading a file including the AV reproduction information from a BD-J (Blu-ray Disc Java) storage medium to obtain the AV reproduction information; (B) generating a user selection menu comprising one or more selection items; (C) generating a plurality of selection lists according to the selection item based on the AV reproduction information; (D) displaying the user selection menu via display means; (E) displaying one or more selection lists according to the selection item through the display means when one of the selection items of the user selection menu is selected through the user input means; And (F) controlling a playback environment setting and AV playback based on the AV playback information when one of the selection lists is selected; And, Step (A) is Reading a playlist file from the BD-J storage medium; Reading contents of at least one playitem included in the playlist file, and recognizing clip file information corresponding to each playitem and a start time and an end time when the playitem corresponds to a clip file; And Obtaining a play time corresponding to the playitem from the start time and the end time, and accumulating the play time to calculate an actual play time of each playitem; And, Step (B) is, Generating a selection item (hereinafter, referred to as an 'AV playback time selection item') having a plurality of playback time points of a selection list arranged in chronological order; AV control method of a BD-J storage medium, characterized in that configured to include. The method according to claim 2, Step (F) is Reading a playlist file including a playitem corresponding to the playback point when one of the playback points listed in the selection list constituting the AV playback point selection item is selected; Recognizing a playitem corresponding to the playing time included in the playlist file; Reading a clip file corresponding to the playitem and reading AV stream file time information corresponding to a start time and an end time of the playitem from the clip file; And Reading an AV stream file corresponding to the clip file and reproducing a section corresponding to the AV stream file time information; AV control method of a BD-J storage medium, characterized in that configured to include. The method according to claim 2 or 3, Step (A) is Reading a playlist file from the BD-J storage medium and reading the contents of a playitem included in the playlist file; Reading a clip file corresponding to the playitem; And Extracting audio information including at least one of a selectable number of audios, compression information of each audio, and language information of each audio from the clip file; And, Step (B) is, Generating an audio selection item having a selection list for a plurality of audio settings based on the audio information; And, Step (F) is If one of the audio settings is selected, reading and playing an audio stream corresponding to the selected audio setting from an AV stream file during AV playback; AV control method of a BD-J storage medium, characterized in that configured to include. The method according to claim 2 or 3, Step (A) is Reading a playlist file from the BD-J storage medium and reading the contents of a playitem included in the playlist file; Reading a clip file corresponding to the playitem; And Extracting subtitle information including at least one of a selectable number of subtitles and language information of each subtitle from the clip file; Step (B) is, Generating a caption selection item having a selection list for a plurality of caption settings based on the caption information; And, Step (F) is If one of the subtitle settings is selected, reading and outputting a text subtitle stream corresponding to the selected subtitle setting from an AV stream during AV reproduction; AV control method of a BD-J storage medium, characterized in that configured to include. The method according to claim 2 or 3, Step (A) is Reading a playlist file from the BD-J storage medium; Reading contents of at least one playitem included in the playlist file, and recognizing clip file information corresponding to each playitem and a start time and an end time when the playitem corresponds to a clip file; Obtaining a play time corresponding to the playitem from the start time and the end time; Recognizing a playitem having the longest playback time as one of the main videos, and classifying the main video and the featured video based on at least one of a play time of each playitem and a capacity of an AV stream file corresponding to the playitem; And Calculating an actual playback time of the playitem by accumulating the playtimes of the playitem classified as the feature video; And, Step (B) is, Generating a selection item (hereinafter, referred to as a 'feature video playback time selection item') having a selection list in which play points classified as feature videos are arranged in chronological order; AV control method of a BD-J storage medium, characterized in that configured to include. The method according to claim 6, Step (A) is Reading a clip file corresponding to each playitem and classifying it as a main video when audio information and subtitle information included in the clip file are equal to or greater than a predetermined standard; AV control method of the BD-J storage medium further comprises. The method of claim 7, Step (F) is Reading a playlist file including a playitem corresponding to the playback point when one of the playback points listed in the selection list constituting the featured video reproduction point selection item is selected; Recognizing a playitem corresponding to the playing time included in the playlist file; Reading a clip file corresponding to the playitem and reading AV stream file time information corresponding to a start time and an end time of the playitem from the clip file; And Reading an AV stream file corresponding to the clip file and reproducing a section corresponding to the AV stream file time information; AV control method of a BD-J storage medium, characterized in that configured to include.

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