KR20050091944A - Method for managing and reproducing a data file of high density optical disc and apparatus for the same - Google Patents

Abstract

The present invention relates to a high density optical disc, and more particularly, to a file structure for managing main data in a high density optical disc, and a method and apparatus for reproducing the same. According to the present invention, the main AV data and the auxiliary data are composed of independent clips, and the auxiliary data clips existing as the independent clips are classified according to the clip type, and the main AV data is a play item which is a main path. According to the divided clip types, the auxiliary data is managed by sub-playitems which are separate subpaths, so that recording and reproducing of a high density optical disc can be performed more efficiently.

Description

Method for managing and reproducing a data file of high density optical disc and Apparatus for the same}

The present invention relates to a high density optical disc, and more particularly, to a file structure for managing main data in a high density optical disc, and a method and apparatus for reproducing the same.

As optical recording media, optical disks capable of recording large amounts of data are widely used. Among them, recently, a new high-density optical recording medium (HD-DVD) capable of recording and storing high-quality video data and high-quality audio data for a long time, for example, Blu-ray Disc (hereinafter referred to as 'BD'). ) Is being developed.

Blu-ray Disc (BD), the next-generation HD-DVD technology, is a next-generation optical recording solution that can store data that is significantly surpassing that of conventional DVDs.

In relation to the Blu-ray Disc (BD) standard, the development of the optical record player has also begun, but the Blu-ray Disc (BD) standard is not complete yet, it is difficult to develop a complete optical record player.

In particular, in order to efficiently reproduce the data recorded in the Blu-ray Disc (BD) as described above, not only the information about the configuration data file should be provided, but also the information for effectively configuring and managing the data file is organized. Should be provided.

However, in the current Blu-ray Disc (BD) standard, the configuration of the data file, in particular, the unified standard for the auxiliary data file among the files is not complete, and thus, a full-fledged Blu-ray Disc (BD) -based optical recorder is developed. There are a lot of restrictions on this situation, which will be particularly problematic in reproducing and providing the data stream to the user.

Accordingly, an object of the present invention is to solve the problems of the prior art, and to provide a method, apparatus and method for constructing a new data file suitable for a high density optical disk such as a Blu-ray Disc (BD). The technical problem is as follows.

A method of configuring an auxiliary data file among data recorded in an optical disc is provided as a systemized standardized information.

In addition, an object of the present invention is to provide a method and apparatus for efficiently reproducing an optical disc (BD) using the configured auxiliary data file.

In the data file configuration method of the high density optical disc according to the present invention for achieving the above object, the main AV data and the auxiliary data are composed of independent clips, and the auxiliary data clips existing as the independent clips are clip type. The main AV data is a playitem as a main path, and the auxiliary data is managed as a subplayitem as a separate subpath according to the divided clip types.

A data reproducing method of a high density optical disc according to the present invention comprises the steps of: reading information of a corresponding playitem and a subplayitem in a playlist directory according to a reproduction request command for a specific title of a user; And reproducing the playitem and the sub-playitem according to the clip type information of the auxiliary data, the attributes of the main data and the auxiliary data, and time information.

A data reproducing apparatus of a high density optical disc according to the present invention includes a memory for reading out and storing information of a corresponding playitem and a subplayitem in a playlist directory according to a reproduction request command for a specific title of a user, and including in the readout information. And a controller for reproducing the playitem and the sub-playitem according to the clip type information of the supplementary data, the main data and the attributes and time information of the auxiliary data.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an auxiliary data configuration method of a high density optical disc according to the present invention will be described in detail with reference to the accompanying drawings. In addition, the terminology used in the present invention was selected as a general term that is widely used at present, but in some cases, the term is arbitrarily selected by the applicant, and in this case, since the meaning is described in detail in the corresponding part of the present invention, a simple term is used. It is to be understood that the present invention should be understood as meanings of terms other than names.

In this regard, the meaning of "main data" used in the present invention means video and audio data provided to a user by a disc author as a title information recorded in an optical disc, and is generally recorded in MPEG2 format. Also called "main AV stream."

In addition, the meaning of "auxiliary data" means all data related to main data provided to the user for the convenience of reproduction when the "main data" is reproduced, and includes an auxiliary audio stream as background music, Interactive graphic streams that interact with the user, such as PopUp menus and Click Sounds, and subtitle streams that represent presentation graphics such as subtitle information or song lyrics. (subtitle stream) is included.

Accordingly, the auxiliary data may be multiplexed and recorded in the main AV stream in the MPEG2 format according to the characteristics thereof, or may be recorded in the stream file independent of the main AV stream in the MPEG2 format or another format.

In relation to the subtitle information, when a user wants to watch a video currently being played (main AV data) in a subtitle of a specific language, when the user selects a subtitle of the corresponding language among subtitles supported by the optical disc, the subtitle information is displayed on one side of the screen. It means information to be made.

The pop-up menu is introduced to provide different menu information according to the property of data for each specific playback unit. In addition, the popup menu does not change the currently playing background screen and in some cases overlaps with the playing background screen. ) Refers to menu information provided through a small window in the screen. In the above meaning, such menu information is named "PopUp".

In addition, the click sound refers to a simple sound provided to alert the user or to prevent an error in the menu selection when the user wants to select and execute a specific menu. The sound provided upon selection or movement of the menu button is collectively referred to as "click sound". Depending on the application, this may be referred to as a "menu sound".

In addition, in the present invention, as the auxiliary data, "subtitle" means, as mentioned above, the presentation graphic such as the subtitle information or song lyrics, and the subtitle has various formats. It can be recorded in the form of MPEG2 Transport (TS) packet, recorded in a bitmap (Bit-map) binary format, or in text data. In particular, a subtitle recorded as text data, such as the subtitle information, is referred to as a "text subtitle".

In relation to the present invention, a case in which the text subtitle is configured in the MPEG2 format and is recorded as a stream file independent of the main data will be described as an example.

Hereinafter, a recording format for recording the main data and the auxiliary data on a disc and a file structure for managing the same will be described in detail with reference to FIGS. 1 to 2.

  First, Fig. 1 is a diagram showing a file structure for managing data recorded in a disc according to the present invention.

As shown in FIG. 1, at least one BD directory BDMV exists under one root directory, and a general file for ensuring interactivity with a user in the BD directory BDMV. It is a 4 directory including the index file (index.bdmv) and the object file (MovieObject.bdmv) as information, and also contains information on the playback information on the data recorded on the actual disk and how to play it. , A playlist directory (PLAYLIST), a clip information directory (CLIPINF), a stream directory (STREAM), and an auxiliary data directory (AUX DATA).

Hereinafter, the four types of directories and files included therein will be described first. Next, a method of recording auxiliary data and management information for reproducing and managing the same in the optical disc file information will be described.

First, there are files for the main video and audio stream (main AV stream) recorded in a specific format in the disc in the stream directory STREAM. In some cases, an auxiliary data stream such as a text subtitle may exist. .

As mentioned above, the stream file is recorded as a transport packet of the MPEG2 scheme, which is widely known, and thus the extension of the stream file (01000.m2ts, 02000.m2ts) is " * .m2ts ".

In this case, according to a specific use example, the "text subtitle stream (10001.txtst)" recorded in the transport packet of the MPEG 2 system has a characteristic of auxiliary data different from that of the main AV stream. The file extension may be stored in the stream directory STREAM by using "* .txtst".

In addition, the clip information directory (CLIPINF) is composed of Clip info files (* .clpi) corresponding to each stream (* .m2ts) files one-to-one. In particular, the clip information file (* .clpi) stores attribute information and timing information of a corresponding stream file, and among these information, an entry point map (hereinafter referred to as "EP_map") method The Presentation Time Stamp (PTS) and Source Packet Number (SPN) are one-to-one correspondences in a table form, and then to PlayItems or SubPlayItems, which will be described later. Mapping information is provided to enable searching of a specific position of a corresponding stream file (* .m2ts) from time information (In-Time, Out-Time PTS) provided by the system.

As described above, a stream (* .m2ts) file and a clip information file (* .clpi) corresponding to each other are bundled together, and the BD standard calls this a "clip". Therefore, the file " 10001.clpi " in the clip information directory CLIPINF contains attribute information about a file in the stream directory STREAM, for example, the text subtitle stream file " 10001.m2ts ", and the file " 10001. clpi "and" 10001.m2ts "form one clip.

Further, the playlist directory PLAYLIST is composed of playlist files (* .mpls), each playlist file (* .mpls) having at least a playing interval for specifying a playing time of a particular clip. Contains one or more PlayItems.

Therefore, the PlayItem (PlayItem) is the playback start time (In-Time) and the playback end of the specific clip (Clip) specified by the clip name (Clip_Information_File_name) in the PlayItem (PlayItem) to be played back. It has time information on out-time, which has been used in mapping information in clip information (* .clpi).

As a result, the playlist file (* .mpls) becomes basic playback file information for playing the desired clip by the combination of at least one PlayItem.

Also, a playlist file (* .mpls) may include a subplayitem (SubPlayItem) for managing reproduction of auxiliary data. For example, a subplayitem (SubPlayItem) for playing a text subtitle is provided. In this case, the data is reproduced in synchronization with the PlayItem, and when a SubPlayItem for playing a browsable slide show is provided, the data is asynchronous with the PlayItem. -synchronized) to reproduce the data.

In the context of the present invention, a case of managing auxiliary data as the subplayitem (SubPlayItem) will be described by way of example. A detailed description thereof will be described later.

Text subtitles (10001.txtst, 10002.txtst), fonts (aaaaa.font), popup (PopUp) as data which are not multiplexed into the main data stream among auxiliary data streams in the auxiliary data directory (AUX DATA). Auxiliary data streams, such as a menu (not shown) and a click sound (Sound.bdmv), are included. Auxiliary data such as audio information for a browsable slideshow are multiplexed into the main data stream. It is included in the directory STREAM.

In addition, an index file (index.bdmv) and an object file (MovieObject.bdmv) exist in the above-described BD directory (BDMV) as a general file for ensuring interactivity with a user. (index.bdmv) mainly consists of an index table, and a user selectable menu information and title information are provided in the index table.

Meanwhile, FIG. 2 is a diagram briefly illustrating a form in which information related to the file structure according to the present invention is recorded in a disc.

As shown in Fig. 2, a file system information area (File System Information Area) and a play list file and a clip information file for reproducing the recorded stream (* .m2ts) file as system information for managing the entire file from the inner circumference of the disc. And main data and auxiliary data such as an index file (index.bdmv), an object file (MovieObject.bdmv) as a parent file (general file) (also referred to as a "Database Area"), and audio / video / graphics. There is a stream file area recorded therein.

Accordingly, the user determines and utilizes main data and auxiliary data to be reproduced and reproduction methods thereof through file information in the database area and / or stream management information in the stream file area. Done.

Hereinafter, a method of newly defining management information for reproducing auxiliary data according to the present invention, recording it as disk file information, and a method of reproducing auxiliary data using the recorded management information will be described in detail.

3 is a diagram illustrating a method of recording management information for reproducing and managing main AV data and auxiliary data streams of a file structure according to the present invention in file information. In particular, independent clip files are provided for each of a plurality of auxiliary data streams. And a method of managing the plurality of sub-playitems.

As shown in FIG. 3, a specific title to be reproduced is managed by a PlayList file, and main AV data constituting substantial contents of the title is recorded in a main clip (not shown). It is managed by a play item which is a main path.

At this time, one main clip may be managed by a plurality of playitems as necessary, and different main clips may be managed by a plurality of playitems in one playlist. .

In addition, the auxiliary data supporting the main AV data is recorded in a separate clip and managed by sub play items (SubPlayItems) which are sub paths.

That is, the auxiliary data is divided according to the clip type and managed by a plurality of sub-play items. For example, the clip managed by the sub-playitem 1 (SubPlayItem 1) is a browsable slideshow. Can be an audio clip for (Browsale Slideshow), and a clip managed by SubPlayItem 2 includes a number of text subtitles that support subtitle information such as Korean, English, Japanese, or text such as song lyrics. It can be a clip (Text Subtitle clip). In addition, a plurality of other clips (ex, popup, ...) other than the audio clip and the text subtitle clip among the auxiliary data may be managed by SubPlayItem 3.

As described above, the file structure according to the present invention has a structure managed by a plurality of subplayitems (SubPlayItem) for each clip type according to a clip type of each clip independently configured.

At this time, the PlayItem (PlayItem) in the PlayList (PlayList) includes the reproduction management information for reproducing the main data, the Sub PlayItem (SubPlayItem) includes the reproduction management information for reproducing the auxiliary data, In particular, as mentioned above, the reproduction of the clips using information on the reproduction start time (In-Time) and the reproduction end time (Out-Time) of each clip as the reproduction management information. Will be managed. This will be described in more detail with reference to FIGS. 4A to 4C attached to each of the sub-playitems for each attribute.

4A to 4C are diagrams illustrating a main path and a sub path structure for managing playback of clips for each property according to the present invention.

FIG. 4A illustrates an example of an audio clip, ie, an auxiliary audio stream, for a browsable slideshow according to the present invention. As shown in FIG. 4A, FIG. 4A is a sub path for a plurality of PlayItems, which are main paths. PlayItem (SubPlayItem # 1) may be used to represent a browsable slideshow as background music that is an auxiliary audio stream.

In this case, the sub playitem (SubPlayItem) manages the play of the sub-audio stream through the play start time (SubPlayItem_IN_time) and the play end time (SubPlayItem_OUT_time) information of the sub audio stream, and the play item (PlayItem) which is the main path. Has a manner in which it is not synchronized and played back. In addition, according to the BD standard, the subplayitem (SubPlayItem) may not have a plurality of sub audio clips, and manages reproduction of only one sub audio clip.

FIG. 4B is a diagram illustrating a case of a plurality of text subtitle clips, that is, text subtitle streams according to the present invention. As shown in FIG. 4B, a plurality of text subtitle clips having various language information (eg, Korean, English, Japanese, ...) Each of the text subtitle streams is divided into sub clip entry IDs (SubClip_entry_id) and managed by one sub play item (SubPlayItem # 2).

In this case, the sub playitem (SubPlayItem) manages the reproduction of the corresponding text subtitle stream through the reproduction start time (SubPlayItem_IN_time) and the reproduction end time (SubPlayItem_OUT_time) information.

In this case, as described above, the text subtitle stream refers to information displayed on one side of the screen when a video (main AV data) being played is to be viewed in a subtitle of a specific language. It needs to be synchronized and played back.

To this end, the sub playitem (SubPlayItem) is synchronized with the playitem (PlayItem) using information such as PTS (Presentation Time Stamp). That is, the synchronization information is synchronized with the PlayItem through the "sync_PlayItem_id" field information and the "sync_start_PTS_of_PlayItem" field information for synchronizing with the PlayItem which is the main path among the management information of the SubPlayItem.

For example, when the presentation time of the PlayItem (PlayItem) having PlayItem_id equal to 0, which is information for identifying PlayItems, is t1, the sub-item is synchronized with the PlayItem (PlayItem_id = 0). Set the "sync_PlayItem_id" field of the PlayItem (SubPlayItem) to 0 and the "sync_start_PTS_of_PlayItem" field to t1.

Meanwhile, information for distinguishing a plurality of text subtitle streams having various language information will be needed. Details thereof will be described later.

FIG. 4C illustrates an example of an interactive graphic stream according to the present invention. As shown in FIG. 4C, various interactive graphic streams (ex, PopUp,...) That are interactive with a user (other clip in FIG. 3) are illustrated. ) Are divided into sub clip entry IDs (SubClip_entry_id) and managed by one sub play item (SubPlayItem # 3).

In this case, the interactive graphic streams managed by the subplayitem (SubPlayItem # 3) are played asynchronously with the main item, PlayItem (PlayItem), and the subplayitem (SubPlayItem # 3) is played as in the previous case. The playback of the interactive graphic streams is managed through a start time (SubPlayItem_IN_time) and a play end time (SubPlayItem_OUT_time) information.

5A to 5B are exemplified in a case in which a main AV stream and auxiliary data, in particular, a text subtitle are simultaneously provided for the purpose of understanding the present invention, and FIG. 5A shows text as subtitle information in the main AV stream. For example, the subtitle is supported in Korean, and FIG. 5B illustrates an example in which the text subtitle is supported in English as subtitle information in the main AV stream.

As shown in FIGS. 5A and 5B, text subtitles such as Korean and English exist as independent clips, and are displayed on one side of the screen separately from the main AV stream according to a user's selection.

Regarding the present invention, as in the case of the text subtitle, the present invention relates to a method for managing auxiliary data existing as independent clips and managing them as separate sub-playitems according to clip types, and an optical disc reproducing method and a reproducing device. To explain.

6 is a diagram illustrating a syntax structure of a sub path and a sub play item according to the present invention.

As shown in FIG. 6, the syntax of "SubPath ()" included in one playlist (PlayList) and designating a path of auxiliary data associated with main AV data is largely divided into "SubPath_type" field, "number_of_SubPlayItems" field, and " SubPlayItem (i) "field.

The "SubPath_type" field is a field for specifying the type of the subpath. If the type is 2, the sub audio browsable slideshow is displayed. If the type is 3, the interactive graphic presentation menu is displayed. 4 indicates a text subtitle presentation. Accordingly, through the "SubPath_type" field, the optical recording player can determine what type of clip the corresponding sub playitem manages. In this case, only the text subtitle (SubPath_type = 4) is reproduced in synchronization with the main AV data.

The "number_of_SubPlayItems" field is a field indicating the number of sub playitem entries, and the number of sub playitems managed in a sub path is recorded in one playlist through the field.

On the other hand, the syntax of the sub playitem ("SubPlayItem (i)") is again a stream file managed by the sub playitem as a "Clip_Information_file_name" field, and "SubPlayItem_IN_time which designates the start time and the end time of the stream file. A "Clip_codec_identifier" field having a "m2ts" value according to ISO 646, including a "SubPlayItem_OUT_time" field, a "ref_to_STC_id [0]" field indicating a stc_id value for an STC sequence of a clip, And a " sync_PlayItem_id " field and a " sync_start_PTS_of_PlayItem " field for synchronization between the play item and the sub-playitems described above.

In addition, in the sub-playitem syntax, when the auxiliary data is recorded in a plurality of streams, one bit of identification information called "IS_multi_streams" is recorded as information for identifying the auxiliary data. When "IS_multi_streams = 1b", This means that the auxiliary data is recorded in a plurality of streams, and if "IS_multi_streams = 0b", the auxiliary data may be defined to mean a case in which the auxiliary data is recorded as a single stream. Therefore, among the sub-playitem syntax shown in FIG. 6, an if statement or less is an area in which syntax corresponding to the case where auxiliary data is recorded in a plurality of streams is defined.

That is, the above-mentioned contents are described by the "Clip_Information_file_name" field, the "Clip_Codec_Identifier" field, and the "ref_to_STC_id" field, increasing by one by the total number of sub clip entries by a for loop that loops from the clip having the sub clip entry ID of 1. Is to be defined.

In this case, when the Subpath_type is 4, that is, the sub playitem managing the text subtitle, the "language_code" field, which is a field indicating the language information of the text subtitle, is set to 0 when the subclip entry ID (subclip_entry_id) is 0. The defined area and the auxiliary data are inserted below an if statement corresponding to a case where a plurality of streams are recorded.

Accordingly, the sub clip whose sub clip entry ID is 0 has its language information recorded by the " language_code [0] " field, and the language information for each of the plurality of text subtitles in one sub-playitet is repeatedly looped. To be recorded by the "language_code [subclip_entry_id]" field.

That is, the plurality of text subtitles are divided as subclip entry IDs (subclip_entry_id), and the language information for each case is designated while increasing by one as many as the number of subclip entry IDs from the case where the subclip entry ID is 1. will be.

In this regard, the number of text subtitles managed by the sub playitems is at most 255.

Through this method, various language clips of the text subtitle are distinguished, and in addition to the language information of the text subtitle, the selection information for a plurality of clips according to the clip type of the sub playitem is inserted in the "language_code" field. It can be used to do this.

Meanwhile, FIGS. 7 to 10 are diagrams showing a method of including necessary information of auxiliary data clips managed as sub play items in each clip information area according to the present invention.

FIG. 7 is a diagram illustrating information included in a ClipInfo () area of auxiliary data clip information according to the present invention.

As shown in FIG. 7, the clip info file zzzzz.Clpi having attribute information and timing information for each corresponding stream file (* .m2ts, * .txtst, etc.) has five objects ( ClipInfo (), SequenceInfo (), ProgramInfo (), CPI (), and ClipMark ().

Among these, the "ClipInfo ()" area basically includes an "application_type" field. If the "application_type" field is 1, the transport stream for movie applications is set. Transport stream for time based slide show, 3 for transport browsable slide show in main pass, 4 for transport for browsable slide show in sub pass A stream of 5 defines a transport stream for the interactive graphics stream of the subpath, and a stream of 6 defines a transport stream for the text subtitle stream of the subpath. That is, each stream attribute is defined according to the "application_type".

In this case, when the "application_type" is 6, that is, in the case of a text subtitle stream, a "character_code" field defining character code values, a "number_of_fonts" field defining the total number of fonts, and a plurality of font files Each field contains a "font_file_name [font_id]" field which defines the font file name.

At this time, the character code values used in the "character_code" field are summarized in Table 1 below.

value Character code Encoding 0x00 reserved 0x01 Unicode V1.1 (ISO 10646-1) UTF8 0x02 Unicode V1.1 (ISO 10646-1) UTF16 big endian 0x03 GBK18030-2000 (chinese) N.A 0x04 GB2312 (chinese) N.A 0x05 BIG5 (Chinese) N.A 0x06 Shift JIS (Japanese) N.A 0x07 KSC 5601-1987 including KSC 5653 for Roman character (Korean) N.A others reserved

Character code values can be specified and used according to the values in Table 1 above. Characters in a text subtitle stream are recorded in a big endian form.

On the other hand, the font file specified by the "font_file_name [font_id]" field is pre-loaded into the buffer in advance when the corresponding playlist is played and used.

8 is a diagram illustrating information included in a SequenceInfo () region of auxiliary data clip information according to the present invention.

As shown in FIG. 8, "number_of_ATC_sequences" field information indicating the total number of Arrival Time Clock (ATC) -sequences is basically recorded in the SequenceInfo () area among the five objects of the clip info file (zzzzz.Clpi). Information of the "SPN_ATC_start [atc_id]" field, the "number_of_STC_sequences [atc_id]" field, and the "offset_STC_id" field, sequentially increasing from the ATC ID 0 (ATC_id = 0) which distinguishes the ATC-sequence by the total number of the ATC-sequences. Will be recorded.

The "SPN_ATC_start [atc_id]" field is an area for recording a source packet number (SPN: Source Packet Number) of the start position of the ATC sequence specified by atc_id in the AV stream file, and the "offset_STC_id" field is the first STC. A field indicating an offset stc_id value of a sequence, wherein the "number_of_STC_sequence [atc_id]" field is a field indicating the total number of system time clock (STC) -sequences in the ATC sequence specified by atc_id. In this case, in the case of a text subtitle stream, the total number of STC-sequences is set to 1 (a detailed description thereof will be described later).

Further, STC_id is sequentially increased from the offset value one by one by the number of the total number of STC-sequences designated by the "number_of_STC_sequence [atc_id]" field plus the offset value designated by the "offset_STC_id [atc_id]" field. Information of the "SPN_STC_start [atc_id] [stc_id]" field, the "presentation_start_time [atc_id] [stc_id]" field, and the "presentation_end_time [atc_id] [stc_id]" field.

The "SPN_STC_start [atc_id] [stc_id]" field is a field indicating a source packet number (SPN) of the start position of the STC-sequence specified by stc_id in the ATC-sequence by atc_id. In this case, in the case of a text subtitle stream, the field is set to zero.

Further, the "presentation_start_time [atc_id] [stc_id]" field and the "presentation_end_time [atc_id] [stc_id]" field indicate the start time and end time of the STC_sequence by stc_id of the ATC-sequence specified by atc_id in the AV stream. Field to represent. In this case, in the case of the text subtitle stream, the start time is set to 0, and the end time is the same as the end time of the last presentation.

Meanwhile, FIG. 9 is a diagram showing the STC-sequence of the text subtitle clip according to the present invention.

As shown in FIG. 9, a text subtitle managed by one subplayitem (SubPlayItem) for an HDMV movie represented by a plurality of playitems (PlayItem) has one STC-sequence, and the STC-sequence is a playlist It is expressed in the same manner as the global time axis of (PlayList).

In order to provide continuous text subtitle information irrespective of the number of PlayItems, this is expressed in the same manner as the Global time axis of the PlayList using one STC-sequence. Because it is natural and desirable.

Also, as mentioned above, the start time of the STC-sequence is set to 0, and the end time is equal to the end time of the last presentation.

At this time, in order to decode the text subtitle having one STC-sequence, the decoder should know the information about the STC discontinuity point (see circular arc of FIG. 9) of the main AV clips of the PlayList.

FIG. 10 is a diagram illustrating information included in a ProgrmaInfo () region of auxiliary data clip information according to the present invention. FIG.

As shown in FIG. 10, in the ProgramInfo () area of the five objects of the clip info file (zzzzz.Clpi), the "number_of_program_sequence" field, the "SPN_program_sequence_start [i]" field, the "program_map_PID" field, the "number_of_streams_in_ps [i]" field, and " stream_PID [i] "field," StreamCodingInfo (i, stream_index) "field, etc., wherein the" StreamCodingInfo (i, stream_index) "field is coding for elementary stream of main AV stream and auxiliary data stream. Has information.

Therefore, referring to the configuration of the "StreamCodingInfo (i, stream_index)" field having coding information of an elementary stream, a "length" field indicating the length of the "StreamCodingInfo (i, stream_index)" field and an elementary stream There is a "stream_coding_type" field indicating a coding type of an elementary stream, and includes coding information for various types of streams according to the coding type of the elementary stream.

That is, for example, when the stream_coding_type is 0x02, coding information about an MPEG-2 video stream is displayed, HDMV LPCM audio when 0x80, Dolby AC-3 audio when 0x81, and dts audio when 0x82. 0x90 indicates a presentation graphic stream, 0x91 indicates an interactive graphic stream, and 0x92 indicates a text subtitle stream. In FIG. 10, the stream_coding_type is shown for convenience. The case where 0x02 and 0x92 are shown.)

In this case, when the stream_coding_type is 0x92, that is, in the case of the text subtitle stream, the language information of the text subtitle clips may be included using the "textST_language_code" field.

The above language information insertion method and the language information insertion method of FIG. 6 may be used together, and any one of them may be used separately.

As described above, it is obvious that the method of inserting necessary language information in the text subtitle clip information is applicable to selecting a plurality of pieces of clip information in the sub playitem.

On the other hand, of the five objects of the clip info file (zzzzz.Clpi), CPI () is an area indicating the relationship between the time information and the address information of the AV stream, and the ClipMark () area is an undefined area. Therefore, since the method of managing the auxiliary data clip of the present invention as a sub-playitem is not highly related, a detailed description thereof will be omitted.

Thus, the main features of the present invention can be identified from the above-described embodiment is as follows.

First, sub data existing as independent clips are classified according to clip types and managed by separate sub play items.

Second, in order to manage each of the independently configured clips, the attributes between the sub playitems are divided into SubPath_type information, and the syntax of the sub playitems is configured as in the embodiment of the present invention.

Third, the syntax of the clip info file (zzzzz.Clpi) is configured as in the embodiment of the present invention to include the necessary information of the auxiliary data clips managed by the sub play item in each clip information area.

Each of the above-listed features has individual features, and only the main features of the various features are listed for the understanding of the present invention, and it is obvious that the present invention is not limited to the above-listed features.

11 is a block diagram showing the configuration of an optical recording and reproducing apparatus in which the technical idea of the present invention is implemented according to the above-described embodiment.

As shown in Fig. 11, the optical recording and reproducing apparatus according to the present invention comprises a pickup section 11 for reading main data, auxiliary data and reproduction management information recorded in the optical disk, and controlling the operation of the pickup section 11; Servo 14 and a signal processor 13 for restoring a reproduction signal received from the pickup unit 11 to a desired signal value or modulating and transmitting a signal to be recorded into a signal recorded on an optical disc. ), A memory 15 for pre-loading and temporarily storing the reproduction management information including the auxiliary data, and a microcomputer 16 for controlling the operation.

In this case, the memory 15 used in the present invention is represented by one memory 15 collectively as various storage means (RAM, buffer, etc.) that can exist in the optical recording and reproducing apparatus, and a plurality of storage means having different names. It is apparent that the memory 15 of the present invention can be replaced by the above.

Also, the AV decoder 17 finally decodes the output data under the control of the controller 12 and provides the same to the user. The AV encoder 18 controls the controller 12 to perform a function of recording a signal on an optical disc. According to the control of), the input signal is converted into a signal of a specific format, for example, an MPEG2 transport stream, and provided to the signal processor 13.

In addition, the control unit 12 is a block for controlling the operation of the entire optical recording and reproducing apparatus. If there is a playback request command for a specific title of the user, the control unit 12 includes a corresponding PlayItem and a PlayItem in the PlayList directory. Read SubPlayItem information, and play the PlayItem and the SubPlayItem according to clip type information of the auxiliary data included in the read information, attributes of the main data and the auxiliary data, and time information. Will be played.

As described above, the data file construction method, the playback method, and the playback device of the high-density optical disk according to the present invention are divided into sub-playitems, which are divided according to clip types for auxiliary data existing as independent clips. By managing by (SubPlayItem), there is an effect of more efficiently recording and reproducing the high density optical disc.

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 examples, but should be defined by the claims.

1 is a diagram showing a file structure for managing data recorded on a disc according to the present invention.

2 is a diagram briefly illustrating a form in which information related to the file structure according to the present invention is recorded in a disc.

3 is a diagram showing a method for recording reproduction management information of main AV data and auxiliary data streams of a file structure according to the present invention in file information;

4A to 4C are diagrams illustrating a main path and a sub path structure for managing playback of clips for each property according to the present invention.

5A and 5B illustrate an example in which a main AV stream and the text subtitle are simultaneously provided according to the present invention.

6 is a diagram illustrating a syntax structure of a sub path and a sub play item according to the present invention;

7 is a diagram illustrating information included in a ClipInfo () region of auxiliary data clip information according to the present invention.

8 is a diagram illustrating information included in a SequenceInfo () region of auxiliary data clip information according to the present invention.

9 illustrates an STC-sequence of a text subtitle clip in accordance with the present invention.

FIG. 10 is a diagram illustrating information included in a ProgrmaInfo () region of auxiliary data clip information according to the present invention. FIG.

Fig. 11 is a block diagram showing the construction of the optical recording and reproducing apparatus according to the present invention.

-Explanation of symbols for the main parts of the drawing-

11 pickup 12 control unit

13 signal processing unit 14 servo

15: memory 16: microcomputer

17: AV decoder 18: AV encoder

Claims (15)

Main AV data and auxiliary data are composed of independent clips, The auxiliary data clips existing as the independent clips are classified according to the clip type. The main AV data is a playitem as a main path, and auxiliary data are managed as subplayitems as separate subpaths according to the divided clip types. The method of claim 1, And said sub-playitem manages reproduction of said auxiliary data clips through reproduction start time and end time information. The method of claim 1, wherein the clip type of the auxiliary data, A method for constructing a data file of a high density optical disc, characterized by being divided into an auxiliary audio stream, a text subtitle stream, and an interactive graphic stream. The method of claim 3, wherein And a sub playitem for managing the text subtitle stream having information and time information for distinguishing the playitem in order to synchronize with the main AV data. The method of claim 3, wherein And information for distinguishing the clip types is included in a sub path syntax. The method of claim 1, Property information and time information of the stream file of the auxiliary data clips are included in the information area of the clips. The method of claim 6, And a property information of the stream in a "ClipInfo ()" area of the information area. The method of claim 6, A "SequenceInfo ()" area of the information area includes ATC-sequence and STC-sequence information as time information. The method of claim 8, And a total number of STC sequences in the STC-sequence information is 1 for a text subtitle stream. The method of claim 8, And a presentation start time of a text subtitle stream of the ATC-sequence and STC-sequence information is zero. The method of claim 8, The presentation end time of the text subtitle stream of the ATC-sequence and STC-sequence information is the same as the end time of the last presentation. The method of claim 6, And information on the coding type of the stream file included in the auxiliary data clips in the " ProgramInfo () " area of the information area. An optical disc in which a file is recorded by the file organization method according to claim 1. Reading information of a corresponding playitem and sub playitem in a playlist directory according to a play request command for a specific title of the user; And reproducing the playitem and the subplayitem according to the clip type information of the auxiliary data included in the read-out information, the attributes and time information of the main data and the auxiliary data, and the data of the high density optical disc. How to play. A memory for reading out and storing information of the corresponding playitem and sub playitem in the playlist directory according to a play request command for a specific title of the user; And a control unit for reproducing the playitem and the subplayitem according to the clip type information of the auxiliary data included in the read-out information, the attributes of the main data and the auxiliary data, and the time information. Data playback device.