KR20030033928A - Information storage medium containing event occurrence information, method and apparatus therefor - Google Patents

Abstract

PURPOSE: An information storage medium in which event generation information is recorded, and a method and an apparatus for reproducing the information are provided to easily synchronize a markup document screen with an AV screen by generating a specific event at a designated event generating point. CONSTITUTION: A plurality of video title sets including video objects are recorded in an information storage medium. Each video object is formed of video object units including an audio pack, a video pack, and a navigation pack. A markup document is recorded in the information storage medium for outputting an AV screen on which AV data is reproduced. If the designated navigation pack of the designated video title set is discovered, it is requested to generate the corresponding trigger event when the video object unit containing the navigation pack is reproduced. Accordingly, the designated contents is output to a markup document screen when the corresponding video object unit starts to be reproduced.

Description

Information storage medium in which event occurrence information is recorded, a reproduction method thereof, and a reproducing apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to interactive DVDs, and more particularly, to an information storage medium, a playback apparatus, and a playback method recorded so that web documents can be played back without changing the DVD-Video format.

DVDs on which web documents are recorded along with AV data (hereinafter referred to as "interactive DVD") are sold. AV data recorded on the interactive DVD can be reproduced in two ways. One is a video mode that is displayed in the same manner as a normal DVD, and the other is an interactive mode in which reproduced AV data is displayed through a display window defined by a web document. When the interactive mode is selected by the user, the web browser mounted on the DVD player displays the web document recorded on the interactive DVD. The display window of the web document displays the AV data selected by the user. For example, if the AV data is a movie, a movie is displayed on the display window of the web document, and various additional information such as a script, a plot, a photograph of the actor, and the like related to the movie are displayed in the remaining part. The additional information includes an image file or a text file.

However, in the interactive mode, in order to display AV data through a display window defined according to HTML grammar, "synchronization" of the AV data and the web document is required. Here, "synchronization" includes precise synchronization that is simultaneously played back at a predetermined time in displaying and displaying AV data and web documents together, and synchronization to such a degree that the relationship between them can be maintained. In the conventional interactive mode "synchronization" depends on a timer implemented in software. However, timer-based synchronization has a problem that the implementation becomes complicated. This is even more the case when a plurality of events occur simultaneously.

Accordingly, it is an object of the present invention to provide a recorded information storage medium, a reproducing method thereof, and a reproducing apparatus so that AV data and markup documents can be synchronized and reproduced more easily.

Another object of the present invention is to provide an information storage medium, a reproduction method thereof, and a playback device, which are recorded so that AV data and markup documents can be synchronized and reproduced by utilizing the existing DVD-Video format.

It is still another object of the present invention to provide a recorded information storage medium, a reproducing method, and a reproducing apparatus, which allow a user to more easily designate a predetermined event occurrence time point and to generate a specific event at that time.

1 is a directory structure diagram of an information storage medium according to a preferred embodiment of the present invention;

2A and 2B are data structure diagrams of the reproduction control information of the DVD-Video of FIG. 1;

3 is a detailed structural diagram of a VTS of FIG. 2A;

4 is a detailed structural diagram of a navigation pack NV_PCK;

5 and 6 are detailed structural diagrams of the PCI packet of FIG.

7 and 8 are reference diagrams for explaining the program chain PGC (ProGram Chain),

9A is a view showing an image when NV_PCK_LBN = 0

9B is a view showing an image when NV_PCK_LBN = 1000;

10 is a block diagram of a playback apparatus according to an embodiment of the present invention;

11 is a block diagram of a playback apparatus according to another embodiment of the present invention.

12 is a reference diagram for explaining in detail a process of generating an event according to the present invention by the playback apparatus of FIGS. 10 and 11;

13 is a flowchart for explaining a playback method according to the present invention;

14 is a flowchart illustrating an example of FIG. 13;

FIG. 15 is a flowchart illustrating an example of implementation of FIG. 14.

The object is, in accordance with the invention, AV data recorded in a data structure comprising at least one video object consisting of video object units comprising an audio pack, a video pack and a navigation pack; And event occurrence information for generating an event designated on the basis of the data structure of the AV data.

The information storage medium further includes a markup document for outputting the AV screen on which the AV data is reproduced, and the event occurrence information is recorded in the markup document.

The AV data is recorded in a video title set composed of at least one video object, and the event occurrence information is information for requesting to generate a trigger event when playing a video object unit corresponding to a specified navigation pack of a specified video title set. Im effective. That is, the event occurrence information is information for requesting to output the specified content on the screen when playing the video object unit corresponding to the designated navigation pack of the designated video title set.

On the other hand, according to another field of the present invention the object is to record AV data recorded in a data structure including at least one video object composed of video object units including an audio pack, a video pack, and a navigation pack, and a predetermined event. A method of reproducing an information storage medium having recorded therein event occurrence information, the method comprising: (a) interpreting the event occurrence information; And (b) generating a corresponding event when data of a condition matching the result interpreted from the step (a) is found in the decoding of the AV data.

Step (a) may include: (a1) analyzing event occurrence information in a markup document in which a display window for displaying an AV screen on which the video object is played is defined; And (a2) finding an event occurrence point that matches the interpreted result.

The video title includes at least one video object composed of cells including an audio pack, a video pack, and a navigation pack, and step (b) generates the event when playing a video object unit corresponding to a designated navigation pack. This step is effective.

On the other hand, according to another field of the present invention, the above object is that AV data recorded in a data structure including at least one video object composed of video object units including an audio pack, a video pack, and a navigation pack, and a predetermined event. An apparatus for reproducing an information storage medium having recorded therein event occurrence information, the apparatus comprising: a reader for reading the AV data or event occurrence information; A presentation engine for interpreting the read event occurrence information, outputting the result, and generating an event; And a decoder for requesting to generate an event to the presentation engine when data of a condition matching the analysis result delivered from the presentation engine is found in decoding the read AV data. Is also achieved.

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

In the information storage medium according to the present invention, a video title set including a video object is recorded. The video object is composed of video object units including an audio pack, a video pack, and a navigation pack. In addition, a markup document for supporting the interactive mode is recorded on the information storage medium. In the present specification, the "markup document" refers to a markup resource including not only the markup document itself but also various image files, graphic files, and the like inserted into the markup document. The markup document screen refers to a screen on which a markup document is interpreted and displayed by the markerup document viewer. The markup document defines a display window for decoding and outputting AV data, that is, a video object unit. In addition, according to the present invention, event generation information for generating a trigger event is inserted.

The event occurrence information according to the present invention is described based on the data structure of the AV data recorded on the information storage medium. More specifically, if a specified navigation pack of a specified video title set is found, it requests to generate a corresponding trigger event when a video object unit containing the navigation pack is played. Accordingly, the specified content is output to the predetermined area of the markup document screen when the playback of the video object unit starts. A more detailed description will be described later.

1 is a directory structure diagram of an information storage medium according to a preferred embodiment of the present invention.

Referring to Fig. 1, the root directory is provided with a DVD video directory VIDEO_TS containing AV data. In VIDEO_TS, a file VIDEO_TS.IFO in which navigation information for the entire video title recorded on the disc is recorded is arranged. In VIDEO_TS.IFO, language information designated as a default value for a video title set is recorded. Subsequently, a file VTS_01_0.IFO in which the navigation information for the first video title set is recorded is recorded, and video titles VTS_01_0.VOB, VTS_01_1.VOB, ... that constitute the video title set are recorded. VTS_01_0.VOB, VTS_01_1.VOB, ... are called video objects. Each VOB has an integer number of VOBUs containing a navigation pack, a video pack, and an audio pack. A detailed configuration is disclosed in the DVD-Video standard "DVD-Video for Read Only Memory Disc 1.0".

In the DVD_ENAV, a navigation file DVD_ENAV.IFO according to the present embodiment is recorded. For example, the navigation file contains the definition, organization, number of titles included, basic information, language used for the title, information on subtitles and fonts, markup document display information such as resolution and color, and copyright information. Is recorded. Furthermore, START_UP.HTM is provided in DVD_ENAV. STARTUP.HTM is a markup document that defines a display window on which an AV screen is output. In this case, event generation information for generating a trigger event is inserted according to the present invention. Event occurrence information inserted in STARTUP.HTM is implemented by an API (Application Program Interface). The API takes as parameters a trigger event identifier, an identifier of the specified video title set, and an identifier of the designated navigation pack.

In addition, the DVD_ENAV may be provided with a preload list file STARTUP.PLD for performing preload according to the preload information recorded in STARTUP.HTM. QUIZ.PNG is an example of a file in which contents output in synchronization with an AV screen are recorded when a trigger event according to STARTUP.HTM occurs. A.HTM is the preload target file and A.PNG is the file linked to A.HTM. The present applicant has filed Korean Application No. 01-65393, "Information storage medium on which preload information is recorded, its reproducing apparatus, and a reproducing method." Details of the "preload information", that is, a preload list file, a preload target file, an API for preload, and the like are described in detail in the previously published specification, and thus only the necessary content will be outlined here.

"Preload information" is information for instructing the preload target file to be read and stored in the cache memory. For example, the preload information may be implemented as a link tag in which a path and / or an attribute of the preload list file is inserted. At this time, the link tag is inserted in the head tag. As another example, it is implemented as an API that takes a path and / or attribute of a preload list file as a parameter and calls the preload list file. A resource locator may be added to the paths of the preload list file and the preload target file. Therefore, the path used when calling the preload target file A.HTM recorded in the DVD is represented by dvd: //DVD_ENAV/A.HTM.

2A and 2B are data structure diagrams of the reproduction control information of the DVD-Video of FIG.

Referring to FIG. 2A, a VMG (Video Manager) in which header information of the entire video title is recorded is stored in the DVD video directory, and n video title sets VTS # 1, # 2, ..., #n are stored. . Referring to FIG. 2B, the VMG includes a VMGI (Video Manager Information) in which control data is recorded, a video object set (VOBS) linked to the VMG, and backup data of the VMGI. VOBS may not be included.

3 is a detailed structural diagram of the VTS of FIG. 2A.

Referring to FIG. 3, the VTS includes video title set information VTSI (Video Title Set Information) in which header information is recorded, VOBS for displaying a menu screen, VOBS constituting a video title, and backup data of VTSI. VOBS for displaying the menu screen may not exist.

The VOBS constituting the video title set is composed of K video objects VOB (Video OBject) # 1, # 2, ..., #K. The video object VOB is composed of M cells Cell # 1, # 2, ..., #M. Each cell is composed of L video object units VOBU # 1, # 2, ..., #L. One VOBU has one navigation pack NV_PCK needed to play or search for that VOBU. In addition, the audio pack A_PCK, the video pack V_PCK, and the subpicture pack SP_PCK constituting the VOBU are multiplexed and recorded.

4 is a detailed structural diagram of a navigation pack NV_PCK.

Referring to FIG. 4, the navigation pack NV_PCK is composed of a PCI packet PCI_PKT and a DSI packet DSI_PKT. In the PCI packet, presentation control information necessary for playing the video pack and / or the audio pack is recorded. In the DSI packet, data search information necessary for searching for a video pack and / or an audio pack is recorded.

5 and 6 are detailed structural diagrams of the PCI packet of FIG.

Referring to FIG. 5, a PCI packet includes a PCI_GI in which header information is stored, an NSML_AGLI in which angle information for non-seamless reproduction is stored, an HLI in which highlight information is recorded, and a RECI in which recording information is stored.

Referring to FIG. 6, the PCI_GI includes the navigation pack number NV_PCK_LBN (Logical Block Number), VOBU status information (status of the Analogue Protection System APS) VOBU_CAT and VOBU_UOP_CTL and VOBU describing user operations that are prohibited when VOBU is reproduced and displayed. VOBU_S_PTM describing the playback start time of the video data contained in the VOBU, VOBU_E_PTM describing the playback end point of the video data contained in the VOBU, code VOBU_SE_E_PTM indicating the end of playback of the video data contained in the VOBU, and the corresponding VOBU in the corresponding cell. C_ELTM is provided which describes the elapsed time until playback.

7 and 8 are reference diagrams for explaining a program chain PGC (ProGram Chain).

The program chain refers to a logical unit for playing all or part of a video title, that is, a playback order of a program. In other words, a video title consists of one or more program chains. Referring to Fig. 7, a program chain indicates (a) a video title composed of only one program chain, and (b) indicates a video title described by two or more program chains. Referring to FIG. 8, a program chain is linked with a cell of a corresponding VOB by program chain information PGCI (ProGram Chain Information). PGCI is described in the VMGI described with reference to FIG. 2B and the VTSI described with reference to FIG. 3. The program chain information includes a program chain number PGCN (ProGram Chain Number). The program chain number serves as an identifier as a serial number assigned to a program chain.

According to an embodiment of the present invention, the number NV_PCK_LBN of the navigation pack and the VOBU_S_PTM, which describes the start time of playback of video data, are used as parameters for generating a trigger event as described below. According to another embodiment, the program chain number and the elapsed time of reproduction of the program chain are used as parameters for generating a trigger event. The elapsed playback time indicates the elapsed time from the start of playback of the program chain. According to another embodiment, the title number (TTN) included in the VMG and the elapsed playing time of the title are used as parameters for generating a trigger event.

In particular, when NV_PCK_LBN, VOBU_S_PTM, or the elapsed playing time of a title is used as a parameter for generating a trigger event, the API and necessary parameters inserted into the markup document STARTUP.HTM will be described in more detail as follows.

DvdVideo.SetTrigger (trigger_id, vtsn, nv_lbn, ref)

1) Meaning

Instructs to generate a trigger event when starting playback of a VOBU containing a specified navigation pack of a specified video title set.

2) Parameters

trigger_id: Identifier of trigger event

vtsn: Number of video title set to trigger event

nv_lbn: Navigation pack number NV_PCK_LBN in the video title set where the trigger event will occur

ref: the value to be contained in variable 2 when the event is called

3) Yes

DvdVideo.SetTrigger (0,1,1000,0); // A trigger event is generated at VOBU_S_PTM, which is a time point when VOBU having a navigation pack corresponding to vtsn = 1, nv_lbn = 1000 starts to play. However, such a trigger event does not need to be perfectly synchronized with the AV screen. For example, it may be generated within several tens of msec (about 50 msec) after the start of reproduction.

2.DvdVideo.SetTrigger (trigger_id, vob_id, vobu_s_ptm, ref)

1) Meaning

Instructs to generate a trigger event when starting playback of a VOBU containing a specified navigation pack of a video title set to which the currently playing title belongs.

2) Parameters

trigger_id: Identifier of trigger event

vob_id: VOB ID of the VOB in the video title where the trigger event will occur

vobu_s_ptm: The number of the navigation pack in the video title set where the trigger event will occur. vobu_s_ptm Value

ref: the value to be contained in variable 2 when the event is called

3) Yes

DvdVideo.SetTrigger (0,1,180000,0); // vob_id = 1, A trigger event is generated when a VOBU having a navigation pack corresponding to vobu_s_ptm = 180000 starts to play. However, such a trigger event does not need to be perfectly synchronized with the AV screen. For example, it may be generated within a few seconds after the start of reproduction. Also, vobu_s_ptm is a value that is processed in 1/90000 seconds, so for the convenience of the author, it is given to the parameter in hh: mm: ss: ms (hour: minute: second: milliseconds) and internally in 1/90000 seconds. It is also possible to convert and process.

DvdVideo.SetTrigger (trigger_id, ttn, elapsed_time, ref)

1) Meaning

Instructs to generate a trigger event when starting playback of the VOBU containing the navigation pack at the specified elapsed time point in the specified video title number.

2) Parameters

trigger_id: Identifier of trigger event

ttn: number of video title to be triggered

elapsed_time: The elapsed playback time in the video title where the trigger event will occur.

ref: the value to be contained in variable 2 when the event is called

3) Yes

DvdVideo.SetTrigger (0,1, "00:20:10", 0); // ttn = 1, PVOC When a VOBU with a navigation pack corresponding to 20 minutes and 10 seconds is played, a trigger event is generated. However, such a trigger trigger event does not need to be perfectly synchronized with the AV screen. For example, it may occur within tens of milliseconds (about 50 msec) after the start of reproduction.

4. DvdVideo.ClearTrigger (trigger_id)

1) Meaning

Release the requested trigger event.

2) Parameters

trigger_id: Identifier of trigger event (can be used to release all triggered events by specifying "-1")

3) Yes

DvdVideo.ClearTrigger (-1); // Release all trigger events.

5. DvdVideo.VTSNumber

1) Meaning

Provides the number of the video title set to which the currently playing VOBU belongs.

2) Yes

var a = DvdVideo.VTSNumber // Store the number of the video title set currently playing in a.

6. DvdVideo.CurrentPosition

1) Meaning

Provides the navigation pack number NV_PCK_LBN in the video title set to which the currently playing VOBU belongs.

2) Yes

var b = DvdVideo.CurrentPosition // Stores the number of navigation packs in the video title set currently playing in b.

7. DvdVideo.VOB_ID

1) Meaning

Video object identification number (VOB_ID) to which the currently playing VOBU belongs.

2) Yes

var a = DvdVideo.VOB_ID // Video video object identification number currently playing on a.

8. DvdVideo.CurrentTime

1) Meaning

Provide the VOB_S_PTM of the navigation pack to which the currently playing VOBU belongs. This time can be expressed in the form hh: mm: ss: ms (hour: minute: second: milliseconds) for the author's ease of use.

2) Yes

var b = DvdVideo.CurrentTime // Stores the VOB_S_PTM number of the VOBU currently playing in b in b.

On the other hand, the API for preload inserted in the source code to be described later is as follows.

Navigator.Preload (URL, flag)

1) Meaning

An API that reads preloaded target files to cache memory in advance. The parameter used indicates location information of the preload list file and the preload target file.

2) Parameters

URL: The path of the preload list file or the path of the preload target file

flag: 1 for preload list file, 0 for preload target file

Return value: Returns true if preload succeeds, false otherwise.

3) Yes

navigator.Preload ("http://www.holeywood.com/tom.pld", 1) // Read the preload list file of "http://www.holeywood.com/tom.pld" on the Internet and instruct Read the preload target files into cache memory.

2. navigator.Preload (URL, resType)

1) Meaning

API that reads preloaded target files to cache memory in advance.

2) Parameters

The preload list file, the location information of the preload target file, and the attributes of the preload target file may be indicated.

URL: The path of the preload list file or the path of the preload target file

resType: attributes of the target file

Return value: Returns true if preload succeeds, false otherwise.

3) Yes

navigator.Preload ("dvd: //dvd_enav/a.htm", "text / xml") // Read the preload target file of "dvd: //dvd_enav/a.htm" on the dvd. The file is a text file and an xml file.

navigator.Preload ("http://www.holeywood.com/tom.htm", "text / html") // read the file "http://www.holeywood.com/tom.html" on the Internet come. The file is a text file and an html file.

The following is an example of a DvdVideoEvent object structure.

Interface DvdEvent: Event {readonly attribute unsigned longindex; // readonly attribute unsigned long parm1; readonly attribute unsigned long parm2; readonly attribute unsigned long parm3; void initDVDEvent (in DOMString typeArg, in boolean canBubbleArg, in boolean cancelableArg, in unsigned long indexArg, in unsigned long parm1Arg, in unsigned long parm 2 Arg, in unsigned long parm 3 Arg);

The following is an example of STARUP.HTM source code using the aforementioned API.

<? xml version = "1.0" encoding = "UTF-8"?> <! DOCTYPE html PUBLIC-// DVD // DTD XHTML DVD-HTML 1.0 // EN "http://www.dvdforum.org/enav/ dtd / dvdhtml-1-0.dtd "> <html> <head> <title> Trigger Event Sample </ title> <style type =" text / css "> <!-4x3 based on how the video is output After subtracting 10% from the border of the normal ratio, set the logical pixel of the OSD screen to 720x480 and start the screen configuration.-> @ Video-display {video-placement: backgroundvideo-aspect-ratio: 4x3Nvideo-clip-rectangle: ( Video-background-color: # 00000000clip-rectangle: (0,0,720,480) viewport-rectangle: (0,0,720,480)

<!-Set the background-color of the body to transparent. -> body {background-color: transparent} #quiz {position: absolute; visibility: hidden; overflow: hidden; width: 277; height: 98; clip: rect (0 277 98 0); background-color: #eeeeee; border: outset 4px; </ style> <script> <!-function dvdvideo_handler (evt) / * evt is the interface specification of the above-described Dvd Event Object. Follow. * / {switch (evt.index) {case TRIGGER_EVENT: // traps the trigger event if (evt.parm1 == 1 && evt.parm2 == 0) {/ * Receives the trigger event 1 specified below. * / var demo = document.getElementById ('quiz') demo.style.left = 435; demo.style.top = 377; demo.style.visibility = visible;

DvdVideo.ClearTrigger (1);} if (evt.parm1 == 2 && evt.parm2 == 0) {/ * Receive and preload the trigger event 2 specified below. * / navigator.Preload ("dvd: //dvd_enav/startup.pld", "text / preload");}}} function setupEventListeners () {var htmlNode = document.documentElement; / * Install the event handler. * / htmlNode.addEventListener ("dvdvideo", dvdvideo_handler, true); / * Set where trigger events 1 and 2 will occur. * / DvdVideo.SetTrigger (1,1,1000,0); / * trigger to pop up the quiz * / DvdVideo.SetTrigger (2,1,1200,0); / * trigger to request preload * / DvdVideo.Play (); / * Start playback. * /} //!-> </ script> </ head> <body onload = "setupEventListeners ()"> <!-When the body is loaded, we call setupEventListeners. * / <div id = "quiz"> <img src = "quiz.png"> </ div> </ body> </ html>

The following is an example of the preload list file STARTUP.PLD source code.

<? xml version = "1.0" encoding = "UTF = 8"?> <! DOCTYPE preload PUBLIC "-\\ DVD \\ DTD DVD Preload List 1.0 \\ EN" "http://www.dvdforum.org/enav /dvd-preload-list.dtd"--><preload cachesize = "128KB"> <filedef type = "text / xml" href = "dvd: //DVD_ENAV/A.HTM" /> <filedef type = "image / png "href =" dvd: //DVD_ENAV/A.PNG "/> </ preload>

9A and 9B are screens in which a trigger event is generated according to the above source codes.

9A and 9B, an event does not occur when NV_PCK_LBN = 0, and a quiz screen according to a quiz file QUIZ.PNG on the AV screen at a designated event occurrence time (NV_PCK_LBN = 1000) (markup document). Screen) is displayed.

10 is a block diagram of a playback apparatus according to an embodiment of the present invention.

Referring to FIG. 10, the playback apparatus includes AV data recorded in a data structure including at least one video object composed of video object units including an audio pack, a video pack, and a navigation pack; And a device for reproducing the disc 100 in which event occurrence information for generating a specified event based on the data structure of the AV data is recorded, the reader 1, the decoder 2, the presentation engine 3, and the blender. It includes (4). The reader 1 reads out AV data or event occurrence information. The presentation engine 3 interprets the read event occurrence information, outputs it to the decoder 2, and generates an event requested from the decoder 2. To this end, the presentation engine 3 interprets the event occurrence information recorded therein when playing the markup document in which the display window for displaying the AV screen on which the AV data is reproduced is defined, and that the interpretation result, i. Information about the data structure is transmitted to the decoder 2. For example, information about a time point (point) at which an event is requested may be expressed based on a designated navigation pack of a predetermined video title set.

As another example, in the above-described embodiment, an event is generated based on the video title set number VTSN and the navigation pack number NV_PCK_LBN, but other data conditions, such as the video object number VOB_ID and the start time of the video object unit playback VOBU_S_PTM Event can be generated based on

As another example, this may be represented by a program chain number and an elapse time of the corresponding program chain. The decoder 2 checks the data structure in the process of decoding the read AV data, and informs the presentation engine 3 if data of a condition in which an event is requested is found. When the presentation engine 3 reproduces the AV data having the corresponding data structure, the presentation engine 3 outputs the specified content on the screen at the time when the VOBU corresponding to the designated navigation pack of the designated video title set starts playing or tens of msecs later. . As another example, the specified content is displayed on the screen after a specified elapse time or several tens of msec.

11 is a block diagram of a playback apparatus according to another embodiment of the present invention. However, a redundant description of blocks that perform the same function as that of FIG. 10 will be omitted.

Referring to FIG. 11, the decoder 2 includes a buffer 21, a demultiplexer 22, a stream decoder 23, an SCR generator 24, and a trigger generator 25. The buffer 21 receives and buffers the MPEG PS stream according to the present embodiment as AV data. Demultiplexer 22 demultiplexes the MPEG PS stream into individual packets. The SCR generator 24 monitors clock information attached to each packet to generate a corresponding system clock reference (SCR) based on a predetermined clock value. The trigger generator 25 receives the event occurrence information from the presentation engine 3 and notifies the presentation engine 3 of the trigger occurrence time to the corresponding SCR. On the other hand, the stream decoder 23 decodes the stream packets according to the SCR.

12 is a reference diagram for describing in detail the process of generating an event according to the present invention by the playback apparatus of FIGS. 10 and 11.

Referring to FIG. 12, an AV screen is embedded in a markup document screen and displayed on the display screen. The presentation engine 3 sets the trigger position for the trigger event in the decoder 2. That is, the API recorded in the corresponding markup document is interpreted and the value of the parameter for which the trigger event is set is transmitted to the decoder 2. Decoder 2 informs presentation engine 3 that a trigger identifier is generated to generate an event when the navigation pack of the video title set that matches the parameter value is identified. The presentation engine 3 calls the installed event handler, and the event handler generates an event that outputs the corresponding content on the screen after the requested event occurrence time or a few msec.

Furthermore, the presentation engine 3 may generate an event of preloading the file after the requested event occurrence time or several msec.

Referring to the reproduction method according to the present invention based on the above configuration as follows.

13 is a flowchart for explaining a playback method according to the present invention.

Referring to FIG. 13, the playback apparatus interprets the event occurrence information recorded on the disc 100 (step 1301), checks the data structure of the AV data in the decoding process of the AV data, and generates an event at a corresponding event occurrence point. Step 1302.

14 is a flowchart illustrating an example of FIG. 13.

Referring to FIG. 14, the playback apparatus reproduces a video object requested for playback, outputs an AV screen, and displays the output AV screen on the display window of the markup document screen. In this case, the event occurrence information recorded in the markup document is analyzed (step 1401), and the event occurrence point is determined based on the data structure analyzed in step 1401 (step 1402). The event is generated when the is played (step 1403).

FIG. 15 is a flowchart illustrating an example of implementation of FIG. 14.

Referring to FIG. 15, the decoder 2 of the playback apparatus plays back a video object that has been played back from the user (step 1501). On the other hand, the presentation engine 3 interprets the API recorded in the markup document and transmits the corresponding parameter value to the decoder 2 (step 1502). The decoder 2 informs the presentation engine 3 when the video object unit containing the designated navigation pack of the video title set matching the passed parameter value is confirmed or the program chain number and elapse time are confirmed, and the presentation is performed. The engine 3 calls the event handler and outputs the designated content to the screen at the time when the playback of the corresponding video object unit starts or tens of msecs later. Alternatively, the specified content is output on the screen after the corresponding elapse time or tens of msec of the program chain (step 1503). If the event is preloaded, the corresponding preload target file is preloaded.

In the above-described embodiment, an event is generated based on the video title set number VTSN and the navigation pack number NV_PCK_LBN, but other data structures, such as the video object number VOB_ID and the start time of the video object unit VOB_S_PTM, etc. Event can be generated based on the

The reproduction method can be created by a computer program. Codes and code segments constituting the program can be easily inferred by a computer programmer in the art. The program is also stored in a computer readable medium, and read and executed by a computer to implement a method of recording and reproducing markup documents and AV data. The information storage medium includes a magnetic recording medium, an optical recording medium, and a carrier wave medium.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, by using the data structure of the existing DVD-Video as it is, it is easier to designate a predetermined event occurrence time and to generate a specific event at that time. Accordingly, the markup document screen can be synchronized with the AV screen and outputted more easily. That is, it is not necessary to operate the software timer to synchronize the markup document screen to the AV screen, so that it can be easily implemented. Preload can be performed at a specified point in time.

Claims (27)

AV data recorded in a data structure including at least one video object composed of video object units including an audio pack, a video pack, and a navigation pack; And And event occurrence information for generating a specified event based on the data structure of the AV data. The method of claim 1, And a markup document for outputting the AV screen on which the AV data is reproduced. And the event occurrence information is recorded in the markup document. The method according to claim 1 or 2, The AV data is recorded in a video title set consisting of at least one video object, And the event occurrence information is information for requesting to generate a trigger event when playing a video object unit corresponding to a specified navigation pack of a specified video title set. The method of claim 3, And the event occurrence information is information for requesting to output a specified content to a screen when playing a video object unit corresponding to a designated navigation pack of a specified video title set. The method of claim 4, wherein And the content is displayed on a predetermined area of a markup screen on which the markup document is reproduced. The method of claim 4, wherein The event occurrence information includes a trigger event identifier, an identifier of a designated video title set, and an identifier of a designated navigation pack. The method of claim 6, The trigger event identifier includes an API for setting a trigger event and an API for releasing a trigger event. The method of claim 6, The video title set identifier is a video title set number (VTSN) and the navigation identifier is a navigation pack number (NV_PCK_LBN) information storage medium. The method of claim 6, The video title set identifier is a video object number (VOB_ID) of a video title set to which a title currently being played belongs, and the navigation identifier is determined by a playback start time (VOBU_S_PTM) of the VOBU. The method of claim 6, And the video title set identifier is a program chain number (PGCN), and the navigation identifier is a reproduction time or position of a program chain displayed using the elapsed time (C_ELTM) of the cell. The method of claim 6, The video title set identifier is a number (TTN) of a title, and the navigation identifier is an information storage medium or a reproduction time or position of a title. The method of claim 7, wherein And the API has variables of the trigger event identifier, the identifier of the designated video title, and the identifier of the designated navigation pack as variables. An information storage medium in which AV data recorded in a data structure including at least one video object composed of video object units including an audio pack, a video pack, and a navigation pack, and event occurrence information for generating a predetermined event is recorded. In the playback method, (a) interpreting the event occurrence information; And and (b) generating a corresponding event if a data structure matching the result interpreted in the step (a) is found in the decoding of the AV data. The method of claim 13, Step (a) is (a1) interpreting event occurrence information in a markup document in which a display window for displaying an AV screen on which the video object is played is defined; And (a2) finding a point of occurrence of an event consistent with the analyzed result. The method of claim 14, The video title includes at least one video object consisting of cells including an audio pack, a video pack, and a navigation pack, And (b) generating the event when reproducing the AV data of the event occurrence point. The method of claim 15, Step (b) is (b1) A playback method characterized by outputting a designated content on a screen after a start time of a video object unit corresponding to a designated navigation pack of a designated video title set or a few msecs. The method of claim 13, The event occurrence information includes a trigger event identifier, an identifier of a designated video title, and an identifier of a designated navigation pack. The method of claim 17, And the trigger event identifier includes an identifier for setting a trigger event and an identifier for releasing the trigger event. The method of claim 13, The event occurrence information is a playback method, characterized in that implemented in the API. The method of claim 19, And the API has variables of the trigger event identifier, the identifier of the designated video title, and the identifier of the designated navigation pack as variables. An information storage medium in which AV data recorded in a data structure including at least one video object composed of video object units including an audio pack, a video pack, and a navigation pack, and event occurrence information for generating a predetermined event is recorded. In the reproducing apparatus, A reader for reading the AV data or event occurrence information; A presentation engine for interpreting the read event occurrence information, outputting the result, and generating an event; And a decoder for requesting to generate an event to the presentation engine when a data structure matching the analysis result delivered from the presentation engine is found in decoding the read AV data. The method of claim 21, And the presentation engine interprets event occurrence information recorded in a markup document in which a display window for displaying an AV screen on which the AV data is reproduced is defined. The method of claim 22, And the presentation engine generates the event when playing the AV data corresponding to the designated navigation pack of the designated video title set. The method of claim 23, wherein And the presentation engine outputs the designated contents on the screen after a time point or tens of msecs when the playback of the video object unit corresponding to the designated navigation pack of the designated video title set starts. The method of claim 24, And the event occurrence information is implemented by an API. The method of claim 25, And the API has a trigger event identifier, an identifier of a designated video title, and an identifier of a designated navigation pack as parameters. The method of claim 26, And the trigger event identifier comprises an identifier for setting a trigger event and an identifier for releasing the trigger event.