KR20070120001A - Method and apparatus for presenting and recording data and recording medium - Google Patents

Abstract

A method and a device for reproducing data, a recording method and device, and a recording medium are provided to change titles of a video stream freely by recording a flag about storage of reproducing condition in a recording medium. A recording medium includes a stream area and a management area. The stream area includes a video stream. The management area includes reproducing management data which manages a video stream reproducing operation. The reproducing management data includes information indicating whether to store information on the reproducing condition of a title when the title is changed to another one.

Description

Method and apparatus for reproducing data and recording method, recording apparatus and recording medium {Method and Apparatus for Presenting and Recording Data and Recording Medium}

1 is a diagram illustrating an embodiment of reproducing data in a storage medium and / or storage through an optical recording / reproducing apparatus;

2 shows a file structure recorded on an optical disc as a recording medium of the present invention;

3 illustrates a recording structure of an optical disc as a recording medium of the present invention;

4 is a block diagram schematically showing the overall configuration of the optical recording and reproducing apparatus of the present invention;

5 is a block diagram schematically illustrating a playback system according to an embodiment of the present invention;

6 illustrates a data reproducing apparatus utilizing a playback system according to an embodiment of the present invention;

7 is a diagram illustrating a reproduction scenario;

8 is a diagram illustrating syntax of a Movie Object;

FIG. 9 illustrates a memory unit for storing playback state information included in a playback apparatus according to an exemplary embodiment of the present invention; FIG.

10 is a flowchart illustrating a process of replaying a title before moving after moving the title according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

11: pickup 12: control unit

13: signal processor 15: storage

17: playback system

17a: Player Model

17b: AV decoder

171: User Event Manager

171a: UO controller

172: Module Manager

173: Metadata Manager

174: HDMV module (Movie Module)

174a: Command Processor

175: BD-J Module

175a: Java VM

175b: Application Manager

176: Playback Control Engine

176a: Playback control function

176b: Player registers

177: Presentation Engine

40: Virtual File System

The present invention relates to a method and apparatus for reproducing data stored in a recording medium or storage. The present invention also relates to a method, an apparatus and a recording medium for recording data so that data can be reproduced.

Recently, as a recording medium, an optical disk capable of recording a large amount of data has been widely used. In particular, as demand for high quality image data and high quality sound data increases, HDTV and MPEG2 have emerged. For example, if video data corresponding to one HDTV movie is stored on a disc in MPEG2 image quality, a new high density recording medium having a data storage capacity of 20 GByte or more is required.

In response to these demands, Blu-ray Discs (BDs) and High Definition Digital Versatile Discs (HD-DVDs) are being developed as next generation recording media. In addition, the development of the optical recording and reproducing apparatus applying the high-density recording medium standard is also being made.

However, there is no solution that satisfies the user's desire to play a video stream that was previously played after moving another video stream or operating a menu while playing video stream data. Therefore, there is a need for a specification for a technology capable of replaying video streams.

In order to meet the necessity as described above, it is an object of the present invention to provide a method and apparatus for reproducing data capable of reproducing a title before movement after the title movement.

It is also an object of the present invention to provide a recording medium or a recording method and apparatus in which data is recorded so that a title can be reproduced after the title movement and before the movement.

In order to achieve the above object, the present invention provides a recording medium in which a video stream including at least one title is recorded, the stream area including the video stream and the reproduction management data for managing reproduction of the video stream. And a management area, wherein the reproduction management data includes information indicating whether to store reproduction state information of the title which was being reproduced when moving to another title during reproduction of the title.

In addition, the present invention provides a method for recording a video stream containing at least one title on a recording medium, wherein the stream data including the video stream is generated, and the playback state information of the title being reproduced when the other title is moved during the title reproduction. And a reproduction management data including information indicating whether to store the data, and recording the stream data and the reproduction management data on the recording medium.

The present invention also provides an apparatus for recording video stream data on a recording medium, comprising: a recording unit for recording data on the recording medium; Generating stream data including a video stream, generating reproduction management data including information indicating whether to store the reproduction status information of the title being played when moving to another title during reproduction of the title; and generating the stream data and the reproduction management data. It is characterized in that it comprises a control unit for controlling to record to the recording medium.

The present invention also provides a method for playing a video including at least one title included in data stored in a recording medium or storage, wherein the title is reproduced using reproduction management data included in the data, and the title is reproduced. It is characterized in that it provides a data reproducing method, characterized in that if there is a movement of another title, according to the information indicating whether to store the reproduction state information contained in the reproduction management data, the reproduction state information associated with the title being reproduced is stored. .

The present invention also provides an apparatus for playing a video including at least one title included in data stored in a recording medium or storage, the apparatus comprising: a video decoder for decoding a video stream included in the data; A storage unit for storing reproduction state information; And decoding the title using the reproduction management data included in the data, and if there is a movement of another title during reproduction of the title, according to the information indicating whether to store the reproduction state information in the reproduction management data; And a control unit for storing related reproduction state information in the storage unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

The recording medium used in the present invention is an optical disc, for example, "DVD", "Blu-ray Disc (BD)", "HD-DVD", "Near Field Recording (NFR) disc", or the like. This can be. Hereinafter, for convenience of description, the recording medium is referred to as a "Blu-ray Disc BD". It is obvious that the technical idea of the present invention is equally applicable to other recording media such as HD-DVD, but is not limited thereto.

The term " storage " used below is a kind of storage means provided in the optical recording / reproducing apparatus (FIG. 1), and means an element capable of arbitrarily storing and utilizing necessary information and data. Currently used storage may include, but are not limited to, a hard disk, a system memory, a flash memory, and the like.

In particular, in the context of the present invention, the "storage" is also used as a means for storing data associated with the recording medium, the data may be downloaded from the outside.

In this regard, it is also possible to read some permitted data directly from the recording medium or to generate system data (e.g. metadata) related to the reproduction of the data recorded on the recording medium and store it in the storage. Is self explanatory.

As used herein, the term " contents " means data provided by an author of a recording medium as a content constituting a title.

In relation to this, a person providing content as an external source is collectively called a "content provider (CP)".

"Original data" used below refers to data recorded in the recording medium, and "additional data" refers to data related to the recording medium among the data stored in the storage, and is generally outside the disc. Refers to existing data. Since each data is only distinguished according to the acquisition method, any attribute data existing outside the optical disk and associated with the original data can be referred to as the local data.

In addition, "Title" used below means the reproduction unit which forms an interface with a user. Each title is linked with a specific object, and a stream related to the title recorded in the disc is reproduced according to a command or a program in the object. In particular, in the present invention, for the convenience of description, titles that support seamless multi-angle, multi-story, language credits, director cuts, etc. among titles in which high-definition video data by MPEG compression method recorded in the disc are recorded. HDMV Title (Title). In addition, among the titles in which high-definition video data by MPEG compression method is recorded, data by a Java program that enables high interactivity that supports updating of titles in a recording medium or connectivity with a network. The title recorded with the title is called "BD-J Title".

In relation to this, in the present invention, the title may mean an indexing item existing in the index table. That is, "First Playback" having information on a screen which is first played when a recording medium is loaded, and "Top Menu" providing a menu screen are also a kind of the title. In other words, a playback unit that interfaces with a user corresponds to the title of the present invention regardless of its name.

The " playback management data " used below refers to information used to manage playback of a video stream or an audio stream. The " playback management data " includes a stream number table (STN table) including video stream entry information and audio stream entry information. The "playback management data" also includes a flag indicating whether to store the playback status information of the current title.

Hereinafter, the "Object" to be used is a reproduction command unit for reproducing a title, a menu, or the like. The object is divided into "Movie Object" for "HDMV Title" reproduction and "BD-J Object" for "BD-J Title" reproduction. However, for convenience of explanation, description will be made using "Movie Object" as an example.

The above terms are not limited thereto if there are terms indicating the same function.

1 is a diagram illustrating an embodiment of reproducing data in a storage medium and / or storage through an optical recording / reproducing apparatus.

In this regard, the "optical recording and reproducing apparatus 10" of the present invention is a device capable of recording or reproducing optical discs of various standards. Depending on the design, only an optical disc of a specific standard (e.g., BD) can be made available for recording and reproducing, and it is also possible to play back only without recording. However, in particular, in consideration of the linkage between the Blu-ray Disc BD and the peripheral device to be solved according to the present invention, a BD-Player or a Blu-ray Disc BD for playing back the Blu-ray Disc BD is recorded. A description will be given by using a recorder (BD-Recorder) as an example. In this regard, it is already well known that the "optical recording and reproducing apparatus 110" of the present invention can be a "drive" that can be embedded in a computer or the like.

In addition to the function of recording and reproducing the optical disk 30, the optical recording and reproducing apparatus 10 of the present invention receives an external input signal, processes the signal, and transmits the signal to the user through the external display unit 20. Have. In this case, there is no particular limitation on the inputtable external signal, but a signal received through digital multimedia broadcasting and the Internet will be a representative external input signal. In particular, in the case of the Internet, it is possible to download and use specific data on the Internet through the optical recording and reproducing apparatus 10 as a medium that anyone can easily access at present.

In relation to the original data and the specific data will be described in detail. For example, multiplexed AV streams for a particular title are recorded as the original data recorded in the optical disc, and audio streams different from the audio stream of the original data (for example, Korean) are used as the international data on the Internet. (Eg, English) may be provided. According to a user, there may be a request to download an audio stream (for example, English) which is an international data on the Internet, and play with an AV stream which is an original data, or to play only the partial data. In order to enable this, there is a need for a systematic method of defining an association between the original data and the local data and managing / reproducing the data according to a user's request.

In this regard, in order to realize the user's needs, it is essential to have a file structure associated with the original data and the international data, which can be used in the Blu-ray disc BD through FIGS. 2 and 3. The file structure and data recording structure will be described in detail as follows.

First, Fig. 2 shows a file structure recorded on an optical disc as a recording medium of the present invention, and shows a file structure for reproducing and managing original data recorded in the disc.

That is, in the file structure of the present invention, at least one BDMV directory (BDMV) exists under one root directory. In the BDMV directory (BDMV), an index file ("index") and an object file ("MovieObject") exist as general file (parent file) information for ensuring interactivity with a user. In addition, as a directory having information on the data recorded on the physical disk and a method of playing the same, the playlist directory (PLAYLIST), clip information directory (CLIPINF), stream directory (STREAM), auxiliary directory (AUXDATA), BD-J object directory (BDJO), metadata directory (META) and backup directory (BACKUP). Hereinafter, the directory and the files included in the directory will be described in detail.

The metadata directory META includes a metadata file that is data about a data. The metadata file includes a search file and a metadata file for a disc library. The metadata file may be used for efficient search or management of data when recording and reproducing the data.

The BD-J object directory (BDJO) contains a BD-J object file for playing a BD-J title.

The auxiliary directory AUXDATA contains additional data files required for disc reproduction. For example, there is a " Sound.bdmv " file that provides sound when executing interactive graphics, and a " 10111.otf " file that provides font information when playing a disc.

The stream directory STREAM contains files for an AV stream recorded in a specific format in the disc. Each stream is most commonly recorded as a transport packet of MPEG-2 scheme. Used as "* .m2ts" as the extension of stream files (01000.m2ts, 02000.m2ts). In particular, a stream in which all video / audio / graphic information is multiplexed in the stream is called an AV stream. A title is configured as at least one AV stream file.

The clip information directory (CLIPINF) is composed of clip information files (01000.clpi, 02000.clpi) corresponding to each stream file (* .m2ts). In particular, the clip information file (* .clpi) records attribute information and time information (timing information) of the corresponding stream file (* .m2ts). In this connection, a clip information file (* .clpi) corresponding to a stream file (* .m2ts) and a stream file (* .m2ts) in one-to-one correspondence is bundled and named "clip". That is, "clip" is data including both a stream file (* .m2ts) and a corresponding clip information file (* .clpi).

The playlist directory PLAYLIST includes playlist files (* .mpls). A playlist is a combination of playing intervals at which clips are played. The time to be played is referred to as a PlayItem. Each playlist file (* .mpls) includes at least one playitem and a subplayitem (SubPlayItem). The playitem and subplayitem have information on a play start time (IN-Time) and a play end time (OUT-Time) of a specific clip to be played. Thus, a playlist may be referred to as a combination of playitems.

The backup directory BACKUP includes an index file, an object file (Movie Object, BD-J Object), a unit key file, and a play, in which information related to playback of a disk, among data on the file structure, is recorded. All playlist files (* .mpls) in the list directory (PLAYLIST) and copy files for all clip information files (* .clpi) in the clip information directory (CLIPINF) are stored. This is to separately store for backup in consideration of the fatality of the disc playback when the files are lost.

In this regard, it will be apparent that the file structure of the present invention is not limited to the names and locations described above. In other words, the directories and files should be understood by their meaning and not by name and location.

3 is a diagram illustrating a recording structure of an optical disc as a recording medium of the present invention, in which information related to the above-described file structure is recorded in the disc. As seen from the inner periphery of the disc, the file system information area (File System Information area) as the system information for managing the entire file, the index file, the object file, the playlist file, for playing back the recorded stream (* .m2ts), It can be seen that there is an area in which clip information files and metadata files are recorded (also called "database area"), and a stream area in which a stream or JAR file composed of audio / video / graphics or the like is recorded. .

In addition, an area for recording file information and the like for reproducing contents in the stream area is called a "management area", and the file system information area and database area correspond to this. In relation to this, in some cases, the reproduction information of the stream may be recorded in the header of the stream in the stream area. In this case, the header may also be referred to as a management area. Therefore, information related to reproduction management may be recorded in the "management area". In relation to the present invention, if the management area is requested to move to another title among the reproduction of the title recorded in the stream area, the reproduction status information of the currently playing title, for example, the current title number value or playlist identifier, reproduction of the title A flag indicating whether to store information about the time may be included.

However, each region of FIG. 3 is provided as an example, and it will be apparent that the present invention is not limited to the arrangement structure of each region as shown in FIG. 3.

4 shows one embodiment of the overall configuration of the optical recording and reproducing apparatus 10 of the present invention.

First, the pickup 11 for reproducing the reproduction management data including the original data recorded on the optical disc and the reproduction management file information, the servo 14 for controlling the operation of the pickup 11, and the reproduction received from the pickup 11 A signal processor 13 for restoring a signal to a desired signal value, or modulating and transmitting the signal to be recorded to a signal recorded on an optical disk and a microcomputer 16 for controlling the operation are basically configured.

The control unit 12 according to the embodiment for reproducing downloads and stores the local data existing in addition to the optical disk in the storage 15 by a user command or the like, and also stores the local data and / or the optical disk in the storage 15. My original data will be played back at the user's request. In this manner, the servo 14, the signal processor 13, and the microcomputer 16, which are involved in reproducing data by the control unit, may be collectively referred to as a "reproducing unit".

The playback system 17 finally decodes the data under the control of the controller 12 and provides it to the user. The playback system 17 specifically analyzes the AV decoder 17b for decoding the AV signal, the object command or application relating to the reproduction of the specific title described above, and the user command input through the control unit 12 to determine the playback direction. It consists of the player model 17a which determines. In some embodiments, the player model 17a may be used to include the AV decoder 17b. In this case, the playback system 17 of the present invention becomes the player model.

In this regard, the AV decoder may comprise a plurality of decoders. 5 is a block diagram schematically illustrating a playback system according to an exemplary embodiment of the present invention. Referring to FIG. 5, the decoder 17b of the present invention includes a primary video decoder 510 for decoding a video stream and a secondary video decoder 520 for decoding an audio stream. The decoded video stream is output through video plane 512 and provided to the user. The video stream data may be recorded on the recording medium 30 or may be downloaded to the storage 15 from the outside of the recording medium.

In connection with the present invention, the control unit 12 plays back the title included in the video stream according to the reproduction management data managing the reproduction of the video. In addition, the controller 12 may back-up and store the playback state information related to the title being played so that the title being played can be played again later when there is a move command to another title by a user command or a navigation command during title playback. At this time, the control unit 12 may store the reproduction state information by determining whether a value of a flag indicating whether to store the reproduction state information of the current title is allowed when there is a title movement during reproduction of the title in the reproduction management data. The storage unit for storing the reproduction state information will be described later. If there is a Resume command of the previous title after the title movement, the control unit 12 may replay the title with reference to the backup state information backed up and stored.

The optical recording and reproducing apparatus 10 of the present invention includes an AV encoder 18. The AV encoder 18 converts an input signal into a signal of a specific format, for example, an MPEG2 transport stream, under the control of the control unit 12 to perform a function of recording a signal on an optical disc, and then sends the signal to the signal processing unit 13. Will be provided. Like the AV decoder 17b, the AV encoder 18 may include a plurality of encoders. The control unit 12 may control to record the video and audio streams, the reproduction management data, etc., which are converted through each encoder and provided to the signal processing unit 13, on the optical disc. The signal processor 13, the servo 14, and the microcomputer 16, which are involved in recording data on the optical disk, may be collectively referred to as a "recording unit". In this regard, the reproduction management data may include a flag as to whether to store the reproduction state information related to the current title when the title is moved.

FIG. 6 is a diagram illustrating a data reproducing apparatus utilizing a playback system according to an embodiment of the present invention, and the reproducing system according to the embodiment of the present invention reproduces a video stream.

The term " playback system " refers to collective playback processing means composed of a program (software) and / or hardware provided in the optical recorder. A system for reproducing a recording medium loaded in an optical record player, as well as playing and managing data stored in storage (eg, downloaded from the outside) in association with the recording medium together.

In particular, the playback system 17 includes "User Event Manager 171", "Module Manager 172", "HDMV Module 174", "BD-J Module 175", "Playback control engine 176). "," Presentation engine (177) "and" Virtual File System (40) "is configured, and will be described in detail as follows.

First, as separate playback processing management means for reproducing the HDMV title and the BD-J title, "HDMV Module 174" for the HDMV title and "BD-J Module 175" for the BD-J title, respectively. It is configured independently. The "HDMV Module 174" and the "BD-J Module 175" particularly have a control function for receiving a command or a program in the above-described object (Movie Object or BD-J Object) and processing the same. Have &Quot; Metadata Manager 173 " can perform title selection at any time under the user's control and provide the user with record media and title metadata. The " HDMV Module 174 " and " BD-J Module 175 " separate commands or applications from the hardware configuration of the playback system, thereby enabling portability of the commands or applications. As a means for receiving and processing the command or application, the "Command processor 174a" in the "HDMV Module 174" and the "Java VM 175a" in the "BD-J Module 175". ) "And" Application manager 175b "are provided, respectively.

"Java VM 175a" is a "Virtual Machine" in which the application is executed. "Application manager 175b" includes an application management function that manages the lifecycle of the application.

In addition, the user command is transmitted to the "HDMV Module 174" and the "BD-J Module 175" as well as the operations of the "HDMV Module 174" and the "BD-J Module 175" are controlled. "Module Manager 172" is provided.

The "Playback Control Engine 176" which interprets the playlist file information recorded in the actual disc and performs the playback function according to the playback commands of the "HDMV Module 174" and the "BD-J Module 175". Is provided. In addition, a "Presentation Engine 177" is provided to decode a specific stream managed by the "Playback Control Engine 176" and display it on the screen. In particular, the " Playback Control Engine 176 " includes " Playback Control Functions 176a " that manages the actual playback, " Player status registers (PSR) " and " General purpose registers " ) ") To" Player Registers (176b) ". In some cases, "Playback Control Functions (176a)" may mean "Playback Control Engine (176)". In the present invention, the " Player Registers 176b " is a memory unit for storing the reproduction state information, which is information on the reproduction state of the video. In addition, the "Player Registers 176b" is a memory unit that stores the reproduction status information related to the title in order to reproduce the previous title after moving the title.

In this regard, the HDMV title and the BD-J title each receive a user command of a separate method, and the method of performing the user command is independent of each other. A means for receiving a user command and delivering it to either the "HDMV Module 174" or the "BD-J Module 175" is required, which is in charge of the "User Event Manager 171a". Thus, for example, "User Event Manager 171a" transmits the received command to "Module Manager 172" or "UO Controller 171a" if the received command is a user command by "User Operation (UO)". If the received command is a user command by the "Key Event", the command is transmitted to the "Java VM 175a" in the "BD-J Module 175" for execution.

In addition, the playback system 17 of the present invention may include a "Metadata Manager 173", in which the "Metadata Manager 173" provides a user with a disc library and an enhanced search metadata application. application).

In addition, the playback system 17 of the present invention may include a virtual file system ("Virtual File System") 40, the virtual file system ("Virtual File System") 40 is downloaded from the external storage ( 15) is a system used for the reproduction of data stored in. The virtual file system 40 provides a binding process for creating a virtual package, and accesses a file included in the virtual package. ). The virtual package is defined by a binding unit manifest file used by the virtual file system 40. " Virtual File System " The Binding Unit Manifest File includes management information for a binding action and defines a valid binding of a file to be bound. That is, the virtual file system 40 may configure a virtual package by using a binding unit manifest file after performing a security check. After configuring the virtual package, the virtual file system ("Virtual File System") 40 controls all files to access the virtual package. If a file that accesses a virtual package is detected, the virtual file system ("Virtual File System") 40 is located in a disk or binding unit data area by a binding unit manifest file. Select to determine the location of the actual file. Such a virtual package may be used for both the "HDMV Module 174" and the "BD-J Module 175". In addition, the above-described virtual file system (“Virtual File System”) 40 can combine and reproduce the data stored in the disk and the storage.

In the above-described playback system of the present invention, the "Module Manager 172", "HDMV Module 174", "BD-J Module 175", and "Playback Control Engine 176" are software-based. Processing is possible. Software handling is more useful for design than actual hardware configuration. However, the "Presentation Engine 177", the decoder 19, and the plane are generally designed in hardware. In particular, the components that are processed in software (for example, reference numerals 172, 174, 175, and 176) may be configured as one part of the control unit 12 described above. It is to be understood that the configuration of the present invention is to be understood as its meaning, and is not limited to the hardware configuration or the software configuration.

As an embodiment, a method of playing a playlist using a movie object, which is a unit of a command to play an HDMV title, and moving and resuming a movie object according to moving or resuming a title will be described. First, when the "User Event Manager 171a" determines that it is an HDMV title, the user command is transmitted to the "HDMV Module 174". The playback system defines playback of movie objects, movement between movie objects, and the like. First, the playback of the movie object will be described.

The "HDMV Module 174" manages playback of movie objects. The " HDMV Module 174 " proceeds with the navigation command program included in the movie object and causes the " Playback Control Engine 176 " to play the playlist. During playlist playback, the "HDMV Module 174" keeps the movie object. The playlist is played only during the execution of the movie object. If execution of the movie object is forcibly terminated by a button command or a user operation, playlist playback is also forcibly terminated. There may be various playback scenarios according to the playback method using the movie object, and the playback scenario will be described below.

7 is a diagram schematically illustrating a playback scenario. Hereinafter, the reproduction scenario will be described with reference to FIG. 7.

Scenario movements include Jump, Call, and Resume. Jump is a method of movement that does not return to the current playback position. On the other hand, Call is a moving method that is scheduled to return to the current playback position, and Resume is a moving method that returns to a suspended playback position. This scenario shift is described in more detail as follows.

First, when the user calls the Top Menu 700 and selects Title # 1 702 in the index table, the Movie Object # 2 712 associated with Title # 1 702 is linked. Playlist # 3 722 is then played back if MovieObject # 2 712 commands the corresponding Playlist # 3 714 to play. If there is a movement of a title, the movement of a movie object associated with the title is also accompanied, so that a description will be given by taking an example of a movie object movement type according to a title movement during playback.

In the first embodiment, it is a movement by a Call Title ("Call Title") command during playback. If there is a Call Title ("Call Title") command in Title # 5 during playback, the operation moves from Movie Object # 2 712 to Movie Object # 5 714 associated with Title # 5 704 via the index table. As described above, the call title command may return to the movie object # 2 712, which is the movie object before the movement, to replay the title. For this resume, the current movie object is suspended before moving to the next movie object, and the state is maintained until the resume operation or the delete operation is executed. During suspension, certain values (playback status information) of the Player Status Register are stored in the backup register. This will be described later with reference to FIG. 9. When the Resume command is executed during the suspend, the playlist # 3 722 may be played by moving from the movie object # 5 714 to the movie object # 2 712 again.

In the second embodiment, another example of the movement of suspending the movie object for replay when moving the movie object as in the first embodiment is to execute a "Menu Call" command premised on the replay intention. There is a moving movie object. This movie object movement type is determined by the characteristics of the movie object. All movie objects include a flag "resume_intention_flag" indicating whether to replay after the Top Menu. For example, if the value of the flag "resume_intention_flag" indicates that replay is necessary, if a menu call ("Menu Call") is executed during movie object # 2 712 playback, movie object # 2 712 is reserved. (Suspend) On the other hand, when the value of the flag ("resume_intention_flag") indicates that replay is not necessary, when a menu call ("Menu Call") is executed during the playback of Movie Object # 2 712, Movie Object # 2 712 is executed. It is deleted.

In the third embodiment, there is movement between movie objects by title search ("Title Seacrh") command. Deletes the current movie object regardless of the characteristics of the current movie object. The new movie object to be moved is determined using the index table. For example, if a title search ("Title Search") is requested during the reproduction of the movie object # 2 712, the movie object # 2 712 which is being played back is deleted. If a movie object is suspended when a title search is requested, the movie object is deleted by the title search ("Title Search") command. At the same time, the backup register is initialized.

In the fourth embodiment, this is a movement by a jump title ("Jump to Title") command during title reproduction. If there is a Jump Title ("Jump to Title") command to Title # 2 706 during playback, Movie Object # 7 (716) associated with Title # 2 (706) via the index table in Movie Object # 2 (712). Go to. The jump title ("Jump to Title") command cannot move back to the previous movie object after moving as described above. Therefore, when moving a movie object, the current movie object is deleted.

Hereinafter, the syntax of a movie object MovieObject will be described with reference to FIG. 8. 8 is a diagram illustrating syntax of a movie object.

A movie object block (MovieObject ()) existing in a movie object (MovieObject.bdmv) file includes an identifier (mobjs_id) of a movie object and a parameter of a movie object. In particular, in connection with the present invention, "resume_intention_flag [ mobj _ id ] " 802 indicates a property of a movie object specified by a movie object identifier when a menu call is executed. For example, when the value of "resume_intention_flag [ mobj _ id ] " 802 is "0", the movie object is deleted when the Menu Call command is executed. On the other hand, when the value of "resume_intention_flag [ mobj _ id ] " 802 is "1", the movie object is suspended when the Menu Call command is executed, and the related reproduction state information is backed up.

A "menu_call_mask [ mobj _ id ] " flag 804 indicates whether a Menu Call command is allowed in a movie object specified by a movie object identifier. For example, if the value of "menu_call_mask [ mobj _ id ] " is "0", the Menu Call command is allowed in the movie object. On the other hand, when the value of "menu_call_mask [ mobj _ id ] " is "1", the menu call command is not allowed in the movie object.

The "title_search_mask [ mobj _ id ] " flag 806 indicates whether a Title Search command is allowed in the movie object specified by the movie object identifier. For example, if the value of "title_search_mask [ mobj _ id ] " is "0", the Title Search command is allowed in the movie object. On the other hand, when the value of "title_search_mask [mobj_id] " is "1", the Title Search command is not allowed in the movie object.

This is because Menu Call command or Title Search command can be played because the data recorded on the recording medium can be played without the Author's intention while loading a menu or searching other titles during title playback. This is to make it possible to prevent this from being executed so that playback suitable for the intention of the producer is possible.

The field " number_of_navigation_commands [ mobj _ id ] ”indicates the number of navigation commands included in the movie object identified by the movie object identifier. Navigation commands are distinguished by identifiers, which start with "0".

"navigation_command [mobj id _] [command id _]" field 810 indicates a navigation command associated with the movie object specified by a movie object identifier.

Hereinafter, with reference to FIG. 9, which player status register values are stored in the backup register when the movie object is suspended.

First, when you suspend a MovieObject, it backs up information for replay, such as the playback position (title, chapter, playlist, playitem, and duration), pages, select buttons, and text subtitles. It is stored in a register. Looking at the information stored in such a backup is as follows.

When a movie object is suspended, backup state information is stored in a storage unit. In this case, the memory unit includes a player status register. PSR4 to PSR12 other than PSR9 are stored in the backup register among the player status registers for storing the reproduction status parameter. Hereinafter, each PSR will be described. The values included in the PSR cannot be changed by the navigation command and the BD-J application.

PSR4 represents a current Title Number value. If a title is selected by a user command, navigation command or BD-J application, the PSR4 value is set to the corresponding title number value and the value is maintained during title playback.

PSR5 represents the current chapter number number. When playlist playback starts, PSR5 is set to the "chapter_number" value of the playback portion.

PSR6 represents a current playlist identifier (Playlist_id) value. If a playlist is selected by a user command, navigation command or BD-J application, the PSR6 is set to the corresponding " Playlist_id " and the value is maintained during playlist playback. "Playlist_id" is a numerical value representing the playlist file name. When the playlist file name is "00123.mpls", for example, "Playlist_id" is "123".

PSR7 represents a current PlayItem Identifier (PlayItem_id) value. If a playitem is selected by a user command, navigation command or BD-J application, the PSR7 is set to the corresponding "PalyItem_id" and the value is maintained during playitem playback.

PSR8 represents a playback time measured in 45 kHz clock units at a playback interval of the start time IN_time to the end time OUT_time of the current playitem. The PSR8 is reset to the "In_time" value of the PlayItem block (PlayItem ()) at the start of PlayItem playback. If a playitem is selected by a user command, navigation command or BD-J application, the PSR8 is cleared and the play time is maintained during playitem playback.

The PSR10 is used to indicate which button is selected. When the value included in the PSR10 is changed, the selected button is correspondingly changed. The button identifier value included in the PSR10 is controlled by the button selection model.

PSR11 represents the current page identifier (Page id) in the interactive graphics stream. If the value contained in PSR11 is changed, the displayed page will be changed accordingly. The "Page id" included in PSR11 is controlled by the page selection model.

PSR12 is used to indicate which user style is selected in the text subtitle stream. When the value contained in PSR12 is changed, the selected user style is changed to the user style of "user_style_number" same as PSR12.

PSR36 to 40 and 42 to 44 are backup registers. When the current movie object is suspended, the original register value is stored.

As shown in Fig. 9, PSR36 backs up PSR4, PSR37 backs up PSR5, PSR38 backs up PSR6, PSR39 backs up PSR7, and PSR40 backs up PSR8. PSR42 backs up PSR10, PSR43 backs up PSR11, and PSR44 backs up PSR12.

In the above-described embodiments, the movie object does not require replay in the second embodiment, and in the third and fourth embodiments, the title which was played back before the movie object move and finally before the title move by deleting the movie object before the move. Can not play again. However, depending on the user, there may be a case in which the previous title is to be played again and viewed even when executing such a command. In this case, the present invention proposes a method of suspending a movie object so that the user can play the title before the move again if desired after the move.

In relation to the present invention, a "do_not_clear_resume_information_flag" flag may be included in the reproduction management area so that the title can be played back after moving back to the previous title. For example, the "do_not_clear_resume_information_flag" flag may be included in the movie object block (MovieObject ()). The flag "do_not_clear_resume_information_flag" indicates that title movement is prevented by a "Jump to Title" command, a "Menu Call" command, or a "Title Search" command that is not expected to be replayed. If present, it indicates whether to suspend without deleting the movie object related to the title before moving.

For example, when the value of the flag "do_not_clear_resume_information_flag" is "0", the related movie object is deleted when the title is moved. On the other hand, when the value of the flag "do_not_clear_resume_information_flag" is "1", the current movie object is suspended when the title is moved. Therefore, if a user wants to move after a title move by a jump title ("Jump to Title") command, a "Menu Call" command, or a "Title Search" command, which is not expected to be replayed, the user may change the data before the move again. You can play the title. The flag "do_not_clear_resume_information_flag" may be included in the playlist instead of the movie object. In this case, when the related movie object is suspended, storing the playback state information in the storage unit is as described above.

Hereinafter, a method of replaying a previous title after moving a title will be described in time series with reference to FIG. 10. 10 is a flowchart showing a method of reproducing data.

The title is reproduced by the user command, the navigation command or the BD-J application (S1002).

A title move command may be received by the user's selection during title playback (S1004). Here, the move title command includes a call title ("Call Title") that requires the playback of another title, a jump title ("Jump to Title") that requires a jump to another title, and a top menu to use other functions. A menu call ("Menu Call") or a title search ("Title Search") to search for a title to be moved once.

In step S1004, it is determined whether or not the title move command selected by the user is to be replayed (S1006). Among the title moving methods described above, the moving method presumed to be replayed includes a call title ("Call Title") and a menu call when "resume_intention_flag" indicating whether or not the movie object is suspended is included in the movie object ("Menu Call"). ") Is included. Therefore, it may be determined whether the command selected by the user for moving the title is a call title ("Call Title") or a menu call ("Menu Call"). In the case of a menu call ("Menu Call"), it is determined whether the value of "resume_intention_flag" included in the movie object indicates movie object suspension.

If it is determined in step S1006 that the title movement command is not premised to be replayed, it is determined whether the playback state information is to be stored for replay (S1008). It may be determined whether a value of "do_not_clear_resume_information_flag", which is a flag indicating whether to suspend a movie object related to a title before moving a title in the reproduction management area or to store the current reproduction state information, indicates a permission ('1').

If it is determined in step S1006 that replay is assumed or if it is determined in step S1008 that the playback state information is stored for replay, the playback state information of the current title is stored. The reproducing state information for replaying includes reproduction positions (titles, chapters, playlists, playitems, and reproduction times), pages, selection buttons, text subtitles, and the like. The movie object associated with the current title is suspended, and a certain value of the PSR in which the reproduction status information is stored is backed up and maintained in the backup register during the suspension. PSRs to be backed up include PSRs 4 to 8 and 9 to 11.

If the user commands the title move again after the title move (S1012), the previous title is reproduced with reference to the stored playback state information (S1014). In detail, the command returns to the pre-moving title and moves to a suspended movie object associated with the pre-moving title to play a playlist corresponding to the movie object. At this time, the playback position (title, chapter, playlist, playitem, and playback time), page, selection button, and text subtitle that have been backed up in the backup register can be referred to.

In some cases, when there is a title move command, step S1008 may be performed to determine whether to store the playback state information by suspending the current movie object according to the value of "do_not_clear_resume_information_flag" immediately after removing the step S1006.

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.

According to the present invention as described above, if the user has a desire to see the title before the movement after the title movement, the title played back before the movement can be played again, thereby satisfying the desire of the user.

However, due to the movement between titles, the title before moving may be different from the state intended by the contents provider. Therefore, in some cases, it is possible to record a flag on whether to store the playback state information for replay on the recording medium, thereby satisfying the desire to reproduce the original title of the content provider.

Consequently, according to the present invention, it is possible to freely move the title and to provide an effect of reproducing the title as it is recorded.

Claims (25)

A recording medium in which a video stream including at least one title is recorded, the recording medium comprising: A stream area including the video stream and a management area including reproduction management data for managing reproduction of the video stream, And the reproduction management data includes information indicating whether to store reproduction state information of the title which was being reproduced when moving to another title during reproduction of the title. The method of claim 1, And the title movement is performed by title jump. The method of claim 1, And the title movement is carried out by loading a menu which is not supposed to be reproduced again. The method of claim 1, And the title movement is performed by title searching. The method of claim 1, And the reproduction status information of the current title is backed up in a player status register (PSR). The method according to claim 1 or 5, And the reproduction state information includes information related to at least one or more of a reproduction position, a reproduction time, a page, a selection button, and a user selection style of a text subtitle. The method of claim 6, The information related to the playback position includes at least one or more of a play title, a play chapter, a play list identifier, and a play item identifier. A method of recording a video stream including at least one title on a recording medium, the method comprising: Generate stream data including the video stream, Generating reproduction management data including information indicating whether to store reproduction status information of the title which was being reproduced when moving another title during reproduction of the title; And recording the stream data and the reproduction management data on the recording medium. An apparatus for recording a video stream including at least one title on a recording medium, the apparatus comprising: A recording unit for recording data on the recording medium; And Generate stream data including the video stream, generate reproduction management data including information indicating whether to store reproduction state information related to the title being played upon moving another title during reproduction of the title, and generate the stream data and the reproduction management A control unit for controlling data to be recorded on the recording medium Data recording apparatus comprising a. A method of playing a video including at least one title included in data stored in a recording medium or storage, the method comprising: Reproduce the title using reproduction management data included in the data; And reproducing state information related to the title being reproduced according to the information indicating whether to store the reproducing state information included in the reproducing management data when there is another title movement during the reproducing of the title. The method of claim 10, And replaying the title being reproduced by using the stored reproduction state information. The method of claim 10, And the title movement is performed by title jump. The method of claim 10, And the title movement is performed by loading a menu which is not presupposed to replay. The method of claim 10, And the title movement is performed by title search. The method of claim 10, The reproduction status information is stored in the player status register (PSR). The method according to claim 10 or 15, The reproduction state information includes information related to at least one or more of a reproduction position, a reproduction time, a page, a selection button, and a user selection style of a text subtitle. The method of claim 16, The information related to the play position includes at least one or more of a play title, a play chapter, a play list identifier, and a play item identifier. An apparatus for playing a video including at least one title included in data stored in a recording medium or storage, the apparatus comprising: A video decoder for decoding a video stream included in the data; A storage unit for storing reproduction state information; And The title is decoded using the reproduction management data included in the data, and when there is another title movement during the reproduction of the title, the reproduction related to the title being reproduced according to the information indicating whether to store the reproduction state information in the reproduction management data. A control unit for storing state information in the storage unit Data reproducing apparatus comprising a. The method of claim 18, And the storage unit is a player status register (PSR). The method of claim 18 or 19, And the reproduction state information includes information related to at least one of a reproduction position, a reproduction time, a page, a selection button, and a user selection style of a text subtitle. The method of claim 20, The information related to the play position includes at least one or more of a play title, a play chapter, a play list identifier, and a play item identifier. The method of claim 18, And replaying the title which was being played back before the title movement by using the stored playback state information. The method of claim 18, And the title movement is performed by title jump. The method of claim 18, And the title movement is performed by loading a menu which is not presupposed to be replayed. The method of claim 18, And the title movement is performed by title search.

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