KR100547105B1 - Interactive optical storage medium having preloaded font information, apparatus and method for reproducing thereof - Google Patents

Abstract

The present invention relates to a font preloaded optical information storage medium, a reproducing apparatus and a method thereof, wherein the font preloaded optical information storage medium includes: A / V data including audio data or video data; And interactive data including a command to configure a predetermined interactive screen including the A / V data, and to load fonts required for a plurality of interactive screens into a memory of a playback device in advance during seamless playback. do.

According to the present invention, seamless playback of an audio / video data screen can be guaranteed by a method of loading a font to be used before changing from a simultaneously played audio / video data screen and an interactive data screen to a new interactive screen in a memory.

Description

Interactive optical storage medium having preloaded font information, apparatus and method for reproducing}

1 is a schematic diagram of a typical interactive optical information storage medium.

FIG. 2 is a block diagram of a playback apparatus for playing an interactive DVD as shown in FIG.

3 illustrates a software operating model of the apparatus for reproducing an interactive optical information storage medium.

4 shows an example of an interactive DVD playback screen.

5 is a diagram illustrating an embodiment of a directory structure of a font preloading interactive optical information storage medium of the present invention.

6A and 6B are tables showing examples of supportable language types and basic font indication information defined in the interactive navigation file DVD_ENAV.IFO of FIG. 5.

7 is an example of the A, B, C interactive screen of the present invention.

8 is a volume space structure of an optical information storage medium in which font preload is performed.

Figure 9 illustrates an embodiment of the font preload interactive system of the present invention.

10A and 10B are flowcharts of a method of operating an apparatus for reproducing an optical information storage medium in which font preloading of the present invention is performed.

11A and 11B are flowcharts of a method of loading fonts stored in an optical information storage medium into the optical information storage medium reproducing apparatus.

The present invention relates to an interactive optical information storage medium and a playback apparatus and method thereof, and more particularly, to an optical information storage medium having audio / video data and interactive data with preload font information, a playback apparatus and a playback method thereof. will be.

In general, an optical information storage medium records audio / video (A / V) content information and user-defined information. The A / V content is data of a predetermined standard that the optical information storage medium actually provides, and the user-defined information is recorded by the producer by defining the unique information. Such an optical information storage medium simply plays A / V content through a stationary playback device, and access to and use of user-defined information is also possible using a computer.

Recently, optical information storage media that can operate in a web document-based environment, which output interactive contents through a network link, have also been released. Such optical information storage media are called interactive optical information storage media. Content recorded on the interactive optical information storage medium can be reproduced in two ways. One is general A / V mode playback which plays only general A / V content described above, and the other is interactive mode playback in which A / V content and user-defined information are provided under a web environment. When the interactive mode reproduction is selected by the user, a web document recorded on the interactive optical information storage medium is read through the optical information storage medium reproducing apparatus, and a web-based screen is output based on the web document. A / V data output and interactive data output are done simultaneously in the web-based screen.

For example, if the A / V content is a movie, the movie is screened on a web-based screen, while the user can view interactive content with various additional information related to the movie via optical storage media or network links. have. The additional information may be various types of information such as an image, text, and voice.

1 is a schematic diagram of a typical interactive optical information storage medium.

An interactive DVD disc, which is a kind of interactive optical information storage medium, is composed of a control information area 100, an A / V data area 110, and a DVD interactive data area 120.

The control information area contains DVD volume information and file information. In the A / V data area 110, audio data and video data are recorded as MPEG bit streams, and information for reproduction thereof is contained.

The interactive data area 120 records web document data that enables the construction of a web-based environment such as an HTML document. Web document data refers to web resources covering various image files, audio files, and the like, inserted into a web document. In addition to the area, other area 130 in which data such as user-specific information is recorded may be further included in the optical information storage medium.

FIG. 2 is a block diagram of a playback apparatus for reproducing a DVD medium which is an interactive optical information storage medium as shown in FIG.

In FIG. 2, the DVD reading module 200 is for reading data of a DVD medium.

The modem 202 is a device for receiving web documents from an external network. Web content received over a network can be used in an interactive operating environment such as web content recorded in an interactive data area of a DVD medium.

The signal processing unit 204 processes and stores the DVD playback signal output from the DVD reading module 200 and the web content received through the modem 202 from an external network. The video processor 206 processes only a video signal among the signals processed by the signal processor 204 to be displayed on the screen output device 208.

The audio processor 210 processes only the audio signal processed by the signal processor 204 and outputs the audio signal through the output of the speaker 212.

3 shows a software layer model of an interactive optical information storage medium reproducing apparatus.

The web content layer 300 is a layer that outputs web content from a network or content stored in an optical information storage medium. These are information consisting of data such as A / V data, audio, images, Java applets, HTML, or XML.

The application layer 310 supports plug-ins and has engines (such as JAVA engines or web browsers) that operate document files of web content.

The API layer 320 allows the following hardware layer 330 and the upper software layer 340 to be connected by a specific standard or promise.

4 shows an example of an interactive DVD playback screen.

The interactive DVD playback screen is composed of a screen area 400 where A / V data, which is substantial information of a DVD, is played, and a screen area 410, where interactive data is played. In general, an interactive DVD playback screen takes the same form as a web browser screen. While A / V data is reproduced in the screen area 400, interactive data for additional service to a user in association with the A / V reproduction information is output to the screen. Interactive data screens are usually created using Web documents such as HTML. Accordingly, the interactive data screen 410 may have an interactive reproduction function for controlling A / V data reproduction and an additional information providing function such as information retrieval through a network and a web site link function.

The internal memory of the interactive DVD player has a limit on its capacity. Therefore, it is not possible to store in the memory of the playback apparatus all fonts relating to various types of character shapes used when outputting interactive data stored on a DVD disc. In other words, the font used in the screen area where the interactive data is displayed is about 1.5 megabytes, including Korean and Chinese characters. There is a limit on the memory capacity to store the data in the memory inside the playback device. Thus, the playback device stores only a minimum of device embedded fonts, and the rest of the fonts required for interactive data output are read (or loaded) as needed when stored in the DVD media. Such a font loading method and an interactive DVD playback apparatus that takes the method can newly load a font to be displayed on the screen each time a new interactive data screen is displayed. In the case of seamless playback in which the change of the interactive data screen is automatically made during A / V data reproduction, the interactive data for the newly output interactive data screen must be loaded from the DVD medium into the memory in the playback apparatus. However, since it takes time to load the font, the change of the A / V data reproduction screen may be delayed during that time, thereby causing a disconnection phenomenon during seamless reproduction.

SUMMARY OF THE INVENTION An object of the present invention is to provide an interactive font preload optical information storage medium having font preload information in order to prevent image dropping of A / V data requiring seamless reproduction.

It is another object of the present invention to provide an apparatus and method for reproducing a font preloaded interactive optical information storage medium.

The object is A / V data comprising audio data or video data; And optical information including interactive data including a command to configure a predetermined interactive screen including the A / V data, and to load fonts required for a plurality of interactive screens into a memory of a playback device in advance during seamless playback. Achieved by a storage medium.

The interactive data is preferably a web-based document.

Preferably, the interactive data includes a command to preload font data to be used for all interactive screens in current interactive data at the time of seamless playback.

In the font preload command, it is preferable to provide a font ID for preload information.

In the font preload command, it is preferable to provide a font code range of a font in preload information.

The character code range of the font is preferably determined using a character code defined in ISO 10646.

In the font preload command, the preload information may be provided with attribute information regarding the shape of the font.

The attribute information of the font includes font-family (group and name to which the font belongs), font-style (font style), font-variant (whether or not the font is bold), font-weight (font thickness), font-stretch (Font aspect ratio) and font-size (font size) are preferred.

The optical information storage medium preferably further includes a discard command to remove the loaded font.

Preferably, the discard command is a command for removing by specifying a font file path and a font file name.

Preferably, the discard command is a command for removing a font having a corresponding ID by determining a font ID.

The other object is an A / V data storage area containing audio data or video data; An interactive data area for constructing a predetermined interactive screen including the A / V data and including loading a font required for a plurality of interactive screens into a memory of a playback device in advance during seamless playback; And an interactive data copying area storing the same data as the interactive data in order to prepare for the breakage of the interactive data.

Another object of the present invention is to provide a first memory for storing A / V data read from an optical information storage medium; A second memory for storing interactive data read from the optical information storage medium; An A / V data decoder for decoding A / V data stored in the first memory; And an analysis engine for interpreting interactive data from a second memory and outputting the interactive data to a screen, wherein the second memory is to be preloaded from the optical information storage medium when receiving a request to perform a preload command from the analysis engine. This is achieved by an optical information reproducing apparatus characterized by importing and storing fonts.

Preferably, the interactive data includes a command to preload font data to be used for all interactive screens in current interactive data at the time of seamless playback.

The interpretation engine is preferably an HTML or JavaScript interpretation engine.

The A / V data decoder is preferably an MPEG decoder for decoding A / V data compressed in MPEG form.

The font stored in the second memory according to the preload command is preferably a font to be used for the screen to be displayed after the current interactive screen.

Another object of the present invention is to provide an optical information storage medium in which interactive data including A / V data and a font preload command are recorded; A first memory for reading the optical information storage medium and storing A / V data therefrom; A second memory for reading the optical information storage medium and storing interactive data therefrom; An A / V data decoder for decoding A / V data from the first memory; An analysis engine for interpreting the interactive data from the second memory and providing the interactive screen output information; And a screen output device for composing a screen according to the screen output information received from the analysis engine, synthesizing the output information reproduced from the A / V data decoder in the screen area, and outputting the synthesis result. Is achieved by the optical information reproducing system, characterized in that the font to be preloaded from the optical information storage medium is stored when the preload command execution request is received from the analysis engine.

The screen output device preferably provides a web browser type screen including a screen area where decoded A / V data is reproduced and a screen area where an interactive operation is performed, including a network search and a link in the remaining space.

Another object is to read a control information file containing information about an initial interactive screen configuration from an optical information storage medium; Loading a font determined from information on a supportable language type and a basic font type of the control information file into a memory of a reproduction device; Reading an interactive screen data file to be output; If the screen data file contains a preload command, reading the indicated preload file and loading a font specified in the preload file into a memory of a playback device; Outputting interactive screen data according to the interactive screen display file; And synthesizing and outputting the screen reproduced from the A / V data and the interactive screen.

If the interactive screen display file contains a discard command to delete a predetermined font from the memory, the method further includes removing the predetermined font contained in the memory of the playback device.

Another object is to read an interactive screen data file from an optical information storage medium; Checking whether an interactive screen data file contains a preload command, and if there is a font to be preloaded, reading from the optical information storage medium and loading it into a memory of the optical information storage medium reproducing apparatus; Outputting an interactive data screen; And deleting the font in memory if there is a diskette request for the font.

Another object of the present invention is to provide an interactive data screen output method including: a first table designating a type of supportable language; A second table for designating a language type to be used for the interactive screen corresponding to a language used in the A / V playback screen; And interactive data having a third table designating a basic font to be used for each language determined in the first table.

Preferably, the second table is control information for automatically selecting one of the languages defined in the first table when the language used in the A / V data reproduction screen and the language to be used corresponding to the interactive data screen are not determined in the first table. Do.

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

5 is a diagram illustrating an embodiment of an information directory structure of a font preloading interactive optical information storage medium of the present invention.

In FIG. 5, the font preload interactive optical information storage medium includes a video data directory 500 including A / V data to be substantially reproduced in the interactive data screen area and the reproduction information thereof. It also includes additional files 520 including the interactive data directory 510 and other additional information required for interactive data display.

The video data directory 500 includes a navigation file for controlling files required for playing video / audio information, a video title set management file, a video title menu file, an A / V file to be played, and the like.

The interactive data directory 510 includes data files constituting the interactive screen. For example, let's say your interactive screen data file is in the HTML language, and the screens to be displayed are A, B, and C. In addition, A and B screens are required to seamlessly play A / V data simultaneously and C is a screen selected according to user or system needs.

The interactive data directory 510 includes a control information file (eg, DVD_ENAV.IFO) having control information necessary for initial interactive screen configuration.

Also, an HTML file with A screen data (e.g. A.HTM) displayed in association with video playback information, a control information file (B.PLD) with preload information of B screen data, an HTML with B screen data File (B.HTM), font file to be used for B screen output (B1.PFR), HTML file with C screen data (C.HTM), control information file (C.PLD) with preload information of C screen data , A font file (C1.PFR) to be used for C screen data. Various files required for outputting such screen data may be provided for each supported language. In this case, for example, when configuring a Korean-language interactive screen, a control information file (eg, ILD_FONT.PLD) and a Korean font file (KOR.PFR) for reading a basic font to be initially loaded may be further included in addition to the above-described files. have. Information about the types of languages that can be supported is also included in DVD_ENAV.IFO.

Fig. 6A is a table showing an example of the supportable language type and basic font indication information defined in DVD_ENAV.IFO. The control information for the interactive initial screen configuration includes information on the types of languages that can be supported, the types of languages to be displayed on the interactive screen in conjunction with the A / V data being played, and basic font indication information to be used for the output of the interactive screen data. Listen.

Referring to the table of FIG. 6A, in DVD_ENAV.IFO, the number of languages that can be supported is 3 in the information for supporting multilingual HTML documents. This means that there are three types of languages supported for DVD interactive screen composition. Supported language codes are 0x0412, 0x0411, and 0x0409. These are Korean, Japanese, and English codes defined by ISO-639 standard, which means that Korean, Japanese, and English are supported for interactive screen display.

The language selection conversion table contains the corresponding Korean, Japanese, English, and Chinese codes KR (0x0412), JP (0x0411), EN-US (0x0409), ZH (0x0004) and their respective languages, which are used for DVD video subtitles. The language code to be displayed on the screen is determined. Languages that can be supported for each subtitle are displayed on the interactive screen, but for example, when Chinese is used in the subtitle, it can be seen that the language of the corresponding interactive screen is set to use English.

In the basic font information to be initially loaded for each language, character codes KR (0x0412), JP (0x0411), and EN-US (0x0409) to be used for the interactive screen and basic font information to be initially loaded corresponding to each of them are defined.

FIG. 6B is a table showing that only supportable language information exists in DVD_ENAV.IFO when a basic font is defined in an HTML document in the form of a embedded font (@font_face). If the basic font is in the embedded font format in the HTML document, the initial font information table to be loaded initially shown in the table of FIG. 6A is omitted.

The following is an example of ILD_FONT.PLD, a control information file that reads a basic font for an interactive screen using Korean.

 <? xml version = "1.0"? encoding = "UTF-8"?> <! DOCTYPE preload PUBLIC "-// DVD // DTD DVD Preload List 1.0 // EN" "http://www.dvdforum.org/enav/dtd/dvdhtml-preload-list .mod "> <preload> <fontdef id =" CBAEFOC1B42F11d5A48000D0B7DB671A "font-family =" kor-gulim; arial "type =" application / dvd.pfr "src =" dvd: //dvd_enav/kor/kor.pfr "/ > </ preload>

This information file contains the part defining the resource of the font to be loaded, which corresponds to the unique identification ID of the font. The font-family is described in the form "real name; family name". If a family name is included, when the optical data carrier does not have a font corresponding to the 'real name', the player belongs to the same family as the 'family name' and any other font stored in the player's memory. Can be replaced. When this control information file is read, the optical information storage medium reproducing apparatus loads the font prescribed in the above-mentioned portion into its memory. This font load is executed and interactive screen data is read to form an interactive screen, and then A, B or C interactive screen display files (hereinafter referred to as HTML files) displayed at the same time as A / V data of the optical data storage medium are played back are read and executed. do.

This font load is executed and interactive screen data is read to form an interactive screen, and then A, B or C interactive screen display files (hereinafter referred to as HTML files) displayed at the same time as A / V data of the optical data storage medium are played back are read and executed. do.

7 is an example of the A, B, C interactive screen of the present invention.

The following is an example of an A.HTM file that provides screen information.

 <? 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> In battle ... </ title> <link rel =" preload "src =" dvd: // dvd_enav / kor / b. pld "/> </ head> .. <p align =" center "> <font size =" 5 "face =" kor-gulim "> In battle ... </ FONT> </ P> </ body > </ html>

It can be seen from the A.HTM file that a playback screen is displayed, centered on the size 5 of the kor-gulim font and displayed as "combat ..." (<p align = "center"> <font size = "5" face = "kor-gulim"> In battle ...). In addition to the A screen data, the A.HTM file is provided with B.PLD, preload information on the B screen to be seamlessly reproduced, and link information indicating the path thereof (<link rel = "preload" src = "). dvd: //dvd_enav/eng/b.pld "/>).

An example of a B.PLD file that is a B preload file is shown below.

<? xml version = "1.0" encoding = "UTF-8"?> <! DOCTYPE preload PUBLIC "-// DVD // DTD DVD Preload List 1.0 // EN" "http://www.dvdforum.org/enav / dtd / dvdhtml -preload-list.mod ">                                              <preload cachesize = "1500KB"> <filedef type = "text / xml" src = "dvd: //dvd_enav/kor/b.htm" /> <filedef type = "image / png" src = "dvd: // dvd_enav / kor / b1.png "/> <fontdef id =" A48000D0B7DB671A "font-family =" dotum.arial "font-style =" normal "font-variant =" normal "font-weight =" normal "font-stretch = "normal" font-size = "all" font-range = "U + 0100-0220" type = "application / dvd.pfr" src = "dvd: //dvd_enav/kor/b1.pfr" /> </ preload>

The above information is read from the B.PLD file that is preloaded from the A.HTM file. In the above B.PLD file, it can be seen that the required memory size of the optical information storage medium reproducing apparatus to be prepared for preloading is "1500KB". The data files b.htm and b1.png for the B screen configuration and b1.pfr, the font used in the screen, are preloaded into the memory. The paths of the files to be preloaded are provided as "dvd: //dvd_enav/kor/b.htm", "dvd: //dvd_enav/kor/b1.png", and "dvd: //dvd_enav/kor/b1.pfr". It is becoming.

The above information file contains a code defining a unique identification number of a specific font, such as fontdef id = "A48000D0B7DB671A". The optical information storage medium reproducing apparatus first searches for a font having an id that matches the font identification number (id) mentioned in the code in a font database held by the optical information storage medium reproducing apparatus. When no font matching the id exists in the optical information storage medium reproducing apparatus, the optical information storage medium reproducing apparatus attempts to obtain a font matching the corresponding id from the web or the optical information storage medium.

When a font with a matching id cannot be found anywhere, the optical information storage medium reproducing apparatus refers to the font-range code. font-range is the position of the character code specified in ISO 10646, which defines the font range. font-range is represented as hexadecimal numbers starting with the prefix "U +". For example, U + 05D1 corresponds to "Hebrew letter bet" of ISO 10646 letters. By specifying a font-range that declares a range of fonts to be preloaded in this manner, the optical information storage medium reproducing apparatus can preload only the fonts essential for reproduction. Font ranges can be defined consecutively and discontinuously using "-" and "," as follows:

Example 1) font-range = "U + AC00-D7FF"; The font range in this code is defined as AC00 to D7FF.

Example 2) font-range = "U + 0370-03FF, U + 1F00-1FFF; In this code, the font range is defined as 0370 to 03FF (modern Greek) and 1F00 to 1FFF (polytonic Greek).

Codes such as font-family, font-style, font-variant, font-weight, font-stretch, and font-size can be used to find the most similar font to display on the screen when no font matching the font family described above is found. Additional attribute information that can be found. That is, if the manufacturer does not search for the font that best fits the intended standard, if the font is pre-loaded, the searchable font is replaced by using the additional information given and is output.

When A screen is output from A.HTM and B screen and A / V data are seamlessly played back at a given point in time, the screen data file and font file for B screen are already loaded in the memory in the playback device. This will shorten the time required to load the file. Therefore, it is possible to prevent the phenomenon of disconnection of the A / V data playback image which is concerned.

The following is an example of a B.HTM file given B screen information.

<? 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> A crash in the desert </ title> <link rel =" preload "src =" dvd: //dvd_enav/kor/b.pld " /> <script type = "text / ecmascript"> <! [CDATA [function font_discard () {navigator.Discard ("src: dvd: //dvd_enav/kor/b1.pfr"); // B1 font no longer Not used // font can be removed from memory}]]> </ script> </ head> <body unload = "font_discard ()"> .. <p align = "center"> <font size = "5" face = "dotum"> Desert landing </ font> </ p> </ body> </ html>

It can be seen from the B.HTM file that the screen is provided with a playback screen in which the words " non-desert on the desert " Since B1.PFR corresponding to dotum, which is the font to be used, is already loaded in the memory of the playback device when the A screen is output, no separate load operation and time are required. Therefore, B screen output simultaneously with A / V data playback can be guaranteed seamless playback without dropping due to font loading. At the end of the output of the B screen, B.HTM may include a font_discard command that removes the font to reduce the memory burden caused by the B1.PFR font. In the above code table, "navigator.Discard (" src: dvd: //dvd_enav/kor/b1.pfr ")" is used as an example of a font removing command, but the font stipulated in the example of ILD_FONT.PLD described above. You can also remove the font by simply mentioning the ID. The code would look like this:

Yes)

function font_discard ()

{

navigator.Discard ("id: CBAEFOC1B42F11d5A48000D0B7DB671A", application / dvd.pfr ";

}

Finally, an example of a C.HTM file, which is the data file for a C screen, is shown below.

<? 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> Return to Headquarters </ title> <link rel =" preload "src =" dvd: dvd_enav / kor / c.pld "/> <script type = "text / ecmascript"> <! [CDATA [function font_discard () {navigator.Discard ("src: dvd: //dvd_enav/kor/c1.pfr"); // no longer use the C1 font // can remove font from memory}]]> </ script> </ head> <body unload = "font_discard ()"> .. <p align = "center"> <font size = " 5 "face =" kgothic "> Return to Headquarters </ font> </ p> </ body> </ html>

It can be seen from the C.HTM file that a playback screen is provided in which the word "return to headquarters" is displayed on the screen. Kgothic, the font to be used for C screen display, is associated with the C1.PFR file and is preloaded when the C.PLD file (not shown) is executed. However, since the C screen is not a seamless playback screen, the disconnection from the previous screen due to the time required to preload the font is not a problem. When the C screen is finished outputting, C.HTM includes a discard_command (font_discard), which is a command for removing the font to ease the memory burden after displaying the C1 font. In the discard command at this time, in addition to the method of finding the file containing the font and removing the entire file as in the above code example, there may be a method of removing the font by including only the font ID in the discard command.

8 is a volume space structure of an optical information storage medium in which the font preload described above is performed.

The optical information storage medium of FIG. 8 includes a control information area 800 in which control information of the optical information storage medium is recorded, a video data area 810 containing A / V data and reproduction information for reproducing the same, and the font-free described above. An interactive data area 820 including load interactive information, and an interactive data copy area 830 repeatedly storing data of the area in preparation for damage of the interactive data area 820. The optical information storage medium may further include other areas including product information or user information.

Figure 9 illustrates an embodiment of the font preload interactive system of the present invention.

In FIG. 9, the optical information storage medium 900 includes interactive screen control information for preloading fonts of a screen to be seamlessly reproduced, control data for substantially controlling the output screen, interactive data to be reproduced, and A / V data.

The first memory 910 buffers the compressed A / V data read from the optical information storage medium 900.

The second memory 920 stores interactive data read from the optical information storage medium 900, and when a preload request for a predetermined font is received from the interactive analysis engine 940, the second memory 920 includes the corresponding data contained in the optical information storage medium 900. Get and save the font.

The A / V data decoder 930 decodes A / V data stored in the first memory 910.

The interactive data analysis engine 940 is an analysis engine such as HTML, JavaScript / Java applet, font processing, etc. for analyzing interactive data read from the second memory 920 or the third memory 960. If the interactive data includes a preload command in the interactive data analysis engine 940, the interactive analysis engine 940 preloads the interactive data into the second memory 920.

The screen output device 950 synthesizes and outputs screen output information analyzed by the A / V data decoder 930 and the interactive data analysis engine 940. The screen output device 950 includes a screen area 951 in which decoded A / V data is reproduced, and an interactive screen area where interactive operations are performed, including network search and link, etc., in the remaining space. To provide.

The third memory 960 stores resident fonts and basic fonts initially loaded from the optical information storage medium. If the preload font requested by the analysis engine 940 for screen display is not in the second memory 920, the default font in the third memory 960 is sent to the analysis engine 940. At this time, if there is no font required in the third memory 960, it is first replaced with a default font belonging to the requested font family.

10A is a flowchart of a method of operating an apparatus for reproducing an optical information storage medium in which font preloading of the present invention is performed, the operation steps of which are as follows:

A file (for example, DVD_ENAV.IFO described above) containing control information about the interactive screen configuration is initially read from the interactive optical information storage medium (step 1000). From the displayable language type and basic font indication information specified in the file, the corresponding basic font is loaded into the memory of the playback apparatus such as the third memory 960 of FIG. 9 (step 1010). The screen data file corresponding to the prescribed interactive screen is read (step 1020). If the screen data file contains a preload command, the indicated preload file is read and the font specified by the preload file is loaded into the second memory 920 of the optical information storage medium reproducing apparatus (step 1030). When loading the font specified in the preload file, the playback device first loads the font with the same ID by checking whether there is the same font as the font ID. Also, referring to the font range specified in the preload file, the font is loaded only with the corresponding range. can do. After preloading the font, a screen data file corresponding to the interactive screen of step 1020 is displayed (step 1040). The A / V is played (step 1050). A discard command for a predetermined font may be used in the screen data file, and when the command is requested, an operation of removing the corresponding font in the second memory of the optical information storage medium reproducing apparatus is performed. Font discarding is performed by searching for a corresponding font file or by removing a font of the same ID using a font ID.

10B is another flowchart of an operation method of an apparatus for reproducing an optical information storage medium in which font preloading of the present invention is performed, the operation steps of which are as follows:

A file (eg, DVD_ENAV.IFO described above) containing control information for the first interactive screen configuration is read from the interactive optical information storage medium (step 1001). Read the interactive screen display file to be displayed (step 1011). The basic font stored in the optical information storage medium is loaded into the memory of the playback apparatus (step 1021). The font to be preloaded is loaded (step 1031). When loading a font, the playback apparatus checks whether a font having the same ID as the ID of the font to be preloaded has been previously loaded and stored, and reloads the font if it is not present. Also, the playback apparatus may load fonts of the corresponding ranges by referring to the font ranges defined in the preload file. The screen data file corresponding to the interactive screen is output (step 1041). The A / V data is reproduced (step 1051). A discard command for a predetermined font may be used in the screen data file, and when the command is requested, an operation of removing the corresponding font in the memory of the optical information storage medium reproducing apparatus is performed. Font discarding is performed by searching for a corresponding font file or by removing a font of the same ID using a font ID.

FIG. 11A is a detailed view of FIG. 10A, which is a flowchart of a method of loading a font stored in an optical information storage medium into a memory of the optical information storage medium reproducing apparatus.

5 to 7 together with FIG. 11A, first, a step of reading a DVD_ENAV.IFO file including control information of an initial interactive screen configuration is performed (step 1110). In operation 1120, the control information file checks whether a default font to be loaded exists. If there is a basic font to be loaded initially, the font is loaded from the optical information storage medium into a third memory (such as 960 in FIG. 9) of the playback apparatus (step 1130). After performing step 1130 or if there is no basic font to be loaded in step 1120, the prescribed interactive screen data file is read (step 1130). If the interactive screen data file has preload information and the font to be preloaded is indicated in the preload information (step 1140), it is checked whether the font is already loaded in memory using the font ID (step 1150). The font is loaded into the memory (step 1160). When loading a font, the playback apparatus may load a font having a corresponding range by referring to a font-range defined in the preload file. After performing step 1160 or if there is no font preload request in step 1140, the interactive screen data file is output to the screen (step 1170). If there is a diskette request for the font stored in the second memory (step 1180), the font in the second memory is deleted (step 1190). Font discarding is performed by searching for a corresponding font file or by removing a font of the same ID using a font ID. If there is no font diskette request or after deleting the font in the second memory, a new interactive screen output request is confirmed (step 1200). If such a request is requested, the above-described operation is repeated from step 1130.

FIG. 11B is a detailed view of FIG. 10B, which is a flowchart of a method of loading a font stored in an optical information storage medium into the optical information storage medium reproducing apparatus.

Referring to FIGS. 5 and 7 together with FIG. 11B, first, a step of reading a DVD_ENAV.IFO information file including initial interactive screen configuration control information is performed (step 1111). The prescribed interactive screen data file is read (step 1121). In the interactive screen data file (HTML document file), it is checked whether @font_face, which is a embedded font in the Cascading Style Sheet 2 (CSS) standard, which is a web document related standard, exists in the data file (step 1131). If the embedded font exists, the embedded font is loaded into a memory such as the third memory 960 of FIG. 9 (step 1141). If the preload information file inside the interactive screen data file has a pre-reading font request (step 1151), and if a request is made and the same font is not already loaded into the memory of the playback apparatus (step 1162), the font of FIG. The memory is preloaded into the same memory as the second memory 920 (step 1161). When loading a font, the playback apparatus first checks whether there is a font identical to the font ID, and loads a font having the same ID. If there is no font with the same ID, the font of the corresponding range may be loaded by referring to the font range defined in the preload file. There is no preload font request in step 1151 or the same font is already loaded in the memory of the playback apparatus in step 1162, or after performing step 1161, the interactive screen is output through the interactive screen data file (step 1171). If there is a request for a diskette stored in the second memory (step 1181), the font in the second memory is deleted (step 1191). Font discarding is performed by searching for a corresponding font file or by removing a font of the same ID using a font ID. If there is no font diskette request or after deleting the font in the second memory, a new interactive screen output request is confirmed (step 1201). If there is such a request, the above-described operation is repeated from step 1131.

According to the present invention, the font on the interactive screen can be matched with the language on the video screen to be played back, and the A / V data of the A / V data that is simultaneously played back by being loaded into the memory in advance is searched for the most similar font as quickly as possible before the interactive screen changes. Seamless playback can be guaranteed.

Claims (66)

A / V data, including audio data or video data; And Comprising a predetermined interactive screen including the A / V data, and interactive data including a command to load in advance the fonts required for the plurality of interactive screens into the memory of the playback device during seamless playback Optical Information Storage Media. The method of claim 1, The interactive data storage medium of claim 1, wherein the interactive data is a Web-based document. The method of claim 1, wherein the interactive data is And interactively preloading the current interactive data upon seamless playback and the font data to be used for all subsequent interactive screens. The method of claim 3, An interactive optical information storage medium characterized by providing a font ID to be preloaded in the preload information when the font preload command is executed. The method of claim 3, And a font code range of the font to be preloaded in the preload information. The interactive optical information storage medium of claim 5, wherein the character code range of the font is determined using a character code defined in ISO 10646. The method of claim 3, An interactive optical information storage medium characterized by providing attribute information of a font to be preloaded upon a font preload command. 8. The method of claim 7, wherein the attribute information of the font is font-family (font group and name), font-style (font style), font-variant (font bold or not), font-weight (font) Thickness), font-stretch (font aspect ratio), font-size (font size). The method of claim 1, And further comprising a diskette command to remove the loaded font. The method of claim 9, The diskette command is a command for removing by specifying a font file path and a font file name. The method of claim 9, The diskette command is a command for removing a font having a corresponding ID by determining a font ID. An A / V data storage area containing audio data or video data; An interactive data area for constructing a predetermined interactive screen including the A / V data and including loading a font required for a plurality of interactive screens into a memory of a playback device in advance during seamless playback; And An interactive optical information storage medium comprising an interactive data copying area storing the same data as the interactive data control information in order to prepare for damage of the interactive data The method of claim 12, And the interactive data is a web-based document. The method of claim 12, wherein the interactive data is And interactively preloading the current interactive data upon seamless playback and the font data to be used for all subsequent interactive screens. The method of claim 14, An interactive optical information storage medium characterized by providing a font ID to be preloaded in the preload information when the font preload command is executed. The method of claim 14, And a font code range of the font to be preloaded in the preload information. The interactive optical information storage medium of claim 16, wherein the character code range of the font is determined using a character code defined in ISO 10646. The method of claim 14, An interactive optical information storage medium characterized by providing attribute information of a font to be preloaded upon a font preload command. 19. The method of claim 18, wherein the attribute information of the font is font-family (font group), font-style (font style), font-variant (font bold or not), font-weight (font thickness) Interactive font information storage medium, font-stretch (font aspect ratio), font-size (font size). The method of claim 12, wherein the interactive data area is And further comprising a diskette command to remove the loaded font. The method of claim 20, The diskette command is a command for removing by specifying a font file path and a font file name. The method of claim 20, The diskette command is a command for removing a font having a corresponding ID by determining a font ID. A first memory for storing A / V data read from the optical information storage medium; A second memory for storing interactive data read from the optical information storage medium; An A / V data decoder for decoding A / V data stored in the first memory; And An analysis engine for interpreting the interactive data from the second memory and outputting the interactive data to the screen; Wherein the second memory retrieves and stores a font to be preloaded from the optical information storage medium when receiving the preload command execution request from the analysis engine. The method of claim 23, It further comprises a third memory that embeds the default font, And the basic font is displayed on the screen by replacing the preload font by the analysis engine when there is no font preloaded in the second memory. The method of claim 23, wherein the interactive data is And preloading font data to be used for all interactive screens later in the current interactive data during seamless playback. The method of claim 25, The font preload command provides a font ID in the preload information so that the analysis engine determines whether a font having the same ID is already loaded. The method of claim 25, The font preload command is to provide a font-range of a font to be preloaded in the preload information to cause the analysis engine to preload fonts within the range. The optical information reproducing apparatus according to claim 27, wherein the character code range of the font is determined using a character code defined in ISO 10646. The method of claim 23, wherein the analysis engine And removing the corresponding font from the second memory when the interactive data includes a discard command to remove the loaded font. 30. The system of claim 29, wherein the analysis engine is And searching for and removing a font file path and a font file name to be removed according to the discard command. 30. The system of claim 29, wherein the analysis engine is And searching for the same font as the font ID to be removed according to the discard command to remove the corresponding font. The method of claim 23, The analysis engine is an optical information reproducing apparatus, characterized in that the HTML or JavaScript analysis engine. The optical information reproducing apparatus according to claim 23, wherein the interactive data is a web-based document. The method of claim 23, And the A / V data decoder is an MPEG decoder which decodes A / V data compressed in MPEG form. The method of claim 23, And the font stored in the second memory according to the preload command is a font to be used for a screen to be displayed after the current interactive screen. An optical information storage medium on which interactive data and A / V data including a font preload command are recorded; A first memory for reading the optical information storage medium and storing A / V data therefrom; A second memory for reading the optical information storage medium and storing interactive data therefrom; A decoder for decoding A / V data from the first memory; An analysis engine for interpreting the interactive data from the second memory and providing the interactive screen data; And And a screen output device configured to compose a screen according to the screen data received from the analysis engine, and to synthesize the A / V playback data and the interactive screen data from the decoder in the screen area and output the synthesis result thereof. Wherein the second memory retrieves and stores a font to be preloaded from the optical information storage medium when the second memory receives a request to perform a preload command from an analysis engine. The method of claim 36, And a third memory in which a resident font and a basic font of the optical information storage medium are stored. And the basic font is used as a screen display font by the analysis engine when no font is preloaded in the second memory. The method of claim 37, The optical information storage medium further includes basic embedded font information (@font_face), The embedded font information is loaded into the third memory as a basic font. 37. The method of claim 36, wherein the interactive data is And preloading font data to be used for the next interactive screen in current interactive data during seamless playback. The method of claim 39, The font preload command provides a font ID in the preload information so that the analysis engine determines whether a font having the same ID is already loaded. The method of claim 39, The font preload command is to provide a font-range of a font to be preloaded in the preload information to preload fonts within the range. The optical information reproducing apparatus according to claim 41, wherein the character code range of the font is determined using a character code defined in ISO 10646. 37. The method of claim 36, wherein the analysis engine And removing the corresponding font from the second memory when the interactive data includes a discard command to remove the loaded font. 44. The system of claim 43, wherein the analysis engine is And searching for and removing a font file path and a font file name to be removed according to the discard command. 44. The system of claim 43, wherein the analysis engine is And searching for the same font as the font ID to be removed according to the discard command to remove the corresponding font. 37. The optical information reproducing apparatus according to claim 36, wherein the parsing engine is an HTML or JavaScript parsing engine. The optical information reproducing apparatus according to claim 36, wherein the interactive data is a web-based document. The optical information reproducing apparatus according to claim 36, wherein the decoder is an MPEG decoder which decodes A / V data compressed in an MPEG form. The method of claim 36, And the font stored in the second memory according to the preload command is a font to be used for a screen to be displayed after the current interactive screen. The display device of claim 36, wherein the screen output device comprises: An optical information reproducing apparatus comprising a web browser type screen including a video screen area in which decoded A / V data is played and an area where interactive operation is performed, including network search and link, etc. in the remaining space. In the optical information reproduction method that the font preload is performed, Reading a control information file containing information about an initial interactive screen configuration from an optical information storage medium; Loading a font determined from information on a supportable language type and a basic font type of the control information file into a memory; Reading an interactive screen data file to be output; If the screen data file contains a preload command, reading the indicated preload file and loading a font specified in the preload file into the memory of the playback device; Outputting interactive screen data according to the interactive screen data file; And And synthesizing the interactive screen and the screen on which the A / V data is reproduced. The method of claim 51, The font preload command provides a font ID in the preload information so that the analysis engine determines whether or not a font having the same ID is already loaded. The method of claim 51, The font preload command is to provide a font code range of a font to be preloaded in the preload information to preload fonts within the range. The method of claim 53, wherein the character code range of the font is determined using a character code defined in ISO 10646. The method of claim 51, And removing the corresponding font from the second memory when the interactive data includes a discard command to remove the loaded font. The method of claim 55, And searching for and removing a font file path and a font file name to be removed according to the discard command. The method of claim 55, And searching for the same font as the font ID to be removed according to the discard command and removing the corresponding font. In the font preload method of the optical information reproducing apparatus, Reading an interactive screen data file from an optical information storage medium; Checking whether an interactive screen data file contains a preload command, and if there is a font to be preloaded, reading from the optical information storage medium and loading it into a memory of the optical information reproducing apparatus; Outputting an interactive data screen; And And deleting in-memory fonts if there is a diskette request for the fonts. The method of claim 58, The font preload command provides a font ID in the preload information so that the analysis engine determines whether a font having the same ID is already loaded. The method of claim 58, The font preload command is to provide a font-range of a font to be preloaded in the preload information to preload fonts within the range. 61. The method of claim 60, wherein the character code range of the font is determined using a character code defined in ISO 10646. 59. The method of claim 58, wherein performing the diskette is: A font preloading method characterized by finding and removing a font file path and a font file name to be removed. 59. The method of claim 58, wherein performing the diskette is A font preloading method characterized by finding the same font as the font ID to be removed and removing the corresponding font. The method of claim 58, And the preload command causes the font preload command to be read before displaying the interactive screen to be seamlessly played back. A first table for designating a type of language that can be supported for interactive data display; A second table for designating a language type to be used for the interactive data screen corresponding to a language used in the A / V data reproduction screen; And And an interactive data control information having a third table designating a basic font to be used for each language determined in the first table. 66. The method of claim 65, The second table includes control information for automatically selecting one of the languages defined in the first table when a language used in the A / V data reproduction screen and a language to be used corresponding to the interactive data screen are not determined in the first table. Optical information storage medium, characterized in that it comprises a.

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