KR20080112931A - Information storage medium, manufacturing method and information reproducing method - Google Patents

Abstract

An information storage medium, a manufacturing method and an information playback method are provided to store or reproduce multiple contents to an information storage medium conveniently. An information storage medium includes a plurality of content files corresponding to multiple contents respectively, a plurality of play list files for controlling the reproduction of the respective contents, and a directory or file which is prepared to manage the multiple contents. A manufacturing method of the information storage medium comprises a step of acquiring a file for managing downloading of contents, a step of downloading files corresponding to the contents based on the download management file, and a step of recording the downloaded files in the information recording medium.

Description

Information storage media, manufacturing methods, and information playback methods {INFORMATION STORAGE MEDIUM, MANUFACTURING METHOD AND INFORMATION REPRODUCING METHOD}

This application is based on Japanese Patent Application No. 2007-164259, filed June 21, 2007, which is claimed by priority, the entire contents of which are incorporated herein by reference.

The present invention relates to an information storage medium in which a plurality of contents can be reproduced, a manufacturing method thereof, and an information reproducing method.

Optical discs (information storage media) containing contents such as movies and music and disc reproducing apparatuses (information reproducing apparatuses) for reproducing the optical discs are used. In some cases, a plurality of contents are recorded on a recording medium and reproduced therefrom (for example, see JP-A 2006-40473 (public)).

The standard for optical discs is rapidly moving from the DVD standard to the higher capacity HD DVD standard, and a number of HD DVD-Video contents are now produced and sold. As the capacity of an optical disc increases, it becomes easier to record a plurality of contents on an optical disc in terms of capacity. However, for example, in the HD DVD standard, storing / reproducing a plurality of contents for one optical disc is not considered. For this reason, it cannot be said that an optical disc, an information reproducing apparatus, etc. are convenient for reproducing a plurality of contents.

In view of the foregoing, it is an object of the present invention to provide an information storage medium which is convenient for reproduction of a plurality of contents, a manufacturing method thereof, and an information reproduction method.

An information storage medium according to an aspect of the present invention includes a plurality of content files corresponding to a plurality of contents, a plurality of playlist files for controlling the reproduction of each of the plurality of contents, and a number of contents. A setting file having a multi-content identifier and content number information indicating the number of contents, and a content management file for managing selection from the plurality of contents.

An information reproducing method according to an aspect of the present invention includes a plurality of content files corresponding to a plurality of contents, a plurality of playlist files for controlling the reproduction of each of the plurality of contents, and a plurality of contents. Reading a content management file from an information storage medium including a setting file having a multi-content identifier and content number information indicating the number of contents, and a content management file for managing selection from the plurality of contents; Based on the management file, displaying an image prompting the selection of the content, inputting information regarding the selection of the content in response to the displayed image, and based on the playlist file corresponding to the selected content Playing the content.

The present invention can provide an information storage medium which is convenient for reproduction of a plurality of contents, a manufacturing method thereof, and an information reproduction method.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, embodiment of this invention is described in detail. 1 is a block diagram showing an information reproducing system 100 according to an embodiment of the present invention.

The information reproducing system 100 includes a disc D, a permanent storage device ST, an information reproducing device 110 and a video / audio output device 120 and is connected to a network NW.

The information reproducing apparatus 110 includes a data access manager 111, a navigation manager 112, a data cache 113, a presentation engine 114, an AV renderer 115, an input unit 116, and a setting information storage unit. 117 is provided.

The video / audio output device 120 is a display device (eg, a liquid crystal display or plasma display) and an audio output device (eg, a speaker or headphones).

 The data access manager 111 controls data access to the disk D, the persistent storage ST, and the network NW. That is, the data access manager 111 can read data from the disk D, read data from the persistent storage ST (nonvolatile memory for information storage), and download data from the network NW.

The data access manager 111 receives data (for example, data according to the HD DVD-Video format) from these data sources (disc D, persistent storage ST and network NW), These data are assigned to the navigation manager 112, the data cache 113, and the presentation engine 114, and output. The data access manager 111 instructs the navigation manager 112 to play control files described in XML (eXtended Markup Language) or ECMA (European Computer Manufacturers Association) scripts (playlists, declarations, markups, scripts, etc. described later). (Directly or indirectly through the data cache 113).

The navigation manager 112 includes a content type determination unit 131, a content selection unit 132, and a content reproduction unit 133, and controls content reproduction.

The content type determination unit 131 determines the type of the content such as the disc D. FIG. The content selection unit 132 enables the selection from the plurality of contents in the disc D using the content selection menu. Details of the content determination and the content selection will be described later.

The content reproduction unit 133, which controls the reproduction of the selected content, interprets the reproduction control file or the like received from the data access manager 111, generates a reproduction control command, and outputs it to the presentation engine 114. The content reproduction unit 133 generates a reproduction control command in response to an input (user operation) to the input unit 116 (keyboard, remote controller, or the like) and outputs it to the presentation engine 114.

The data cache 113 is a memory for temporarily storing data used for reproduction.

The presentation engine 114 determines the video and audio output content based on the playback control command and the data used for playback (primary video set, secondary video set, etc. described later), and information that can use the determined content for playback. Convert to In the reproduction data stored in the disc D or the like, video and audio are multiplexed. The presentation engine 114 selects data such as video and audio necessary for reproduction, and returns (demultiplexes) the multiplexed data to the original data. Demultiplexed data is encoded by various codecs (compression formats). As such, the presentation engine 114 decodes the demultiplexed data. The presentation engine 114 generates reproduction data and the like based on the decoded data and the reproduction control command received from the navigation manager 112 and sequentially outputs the reproduction data and the like to the AV renderer 115.

The AV renderer 115 superimposes the video and mixes the audio and outputs the result to the video / audio output device 120.

The input unit 116 is an input means such as a keyboard and a remote controller.

The setting information storage unit 117 stores setting information relating to reproduction and the like. The setting information includes information of the reference directory described later. The disk D is mounted in accordance with the information of the reference directory.

The video / audio output device 120 outputs video and audio in accordance with the signal from the AV renderer 115.

The disc D is, for example, a read-only or recordable optical disc in accordance with the DVD standard or the HD DVD standard. For example, the following recordable optical discs can be used as the disc D. FIG.

-DVD recordable disc

DVD-RAM, DVD-R, DVD-R (Dual Layer), DVD-RW, DVD-RW (Dual Layer), etc.

-HD DVD recordable disc

HD DVD-RAM, HD DVD-R, HD DVD-R (Dual Layer), HD DVD-RW, HD DVD-RW (Dual Layer), etc.

Any content can be written to disc (D) if it complies with the HD DVD-Video standard and the HD DVD-DLV standard.

a. HD DVD-Video Standard

The HD DVD-Video standard defines two types of content, called standard content and advanced content.

Standard content can be defined as an extended version of the DVD standard and is similar to the DVD standard in its data structure and the like. Therefore, it is considered that standard content is easy to be accommodated in a studio producing a DVD. On the other hand, compared to DVD, standard content can realize high quality video and audio, and can use extended navigation commands (command groups used for title jumps, menus, etc.).

Advanced content differs from the DVD standard in data structure and the like. Advanced content, like standard content, delivers high-quality video and audio, as well as expressing playback control information in programming languages such as XML and ECMA scripts, such as home pages on the Internet. In addition, in the advanced content of the HD DVD-Video, not only the content from the disc D, but also the content from the persistent storage ST and the network NW can be reproduced.

b. HD DVD-DLV Standard

The HD DVD-DLV standard defines HD DVD-DLV content. The HD DVD-DLV content refers to content stored in a storage device other than the disk D (eg, a server connected to the network NW) and copied or downloaded to the disk D. In the HD DVD-DLV standard, a plurality of contents may also be stored on a single disc (D). Like HD DVD-Video content, HD DVD-DLV content includes standard content and advanced content.

The HD DVD-DLV content is composed of one or more HD DVD-Video contents, a content name file, a thumbnail picture file, and a content information file described later.

A. Outline of the Data Structure of Disk (D)

(1) the data structure of the content

The disc D has a data structure for facilitating storage of a plurality of contents. FIG. 2 is a diagram showing an example of the data structure of the disc D enabling the storage of a plurality of contents. A directory (content division directory (HDCont_1, HDCont_2, etc.) of each content) is disposed just below the root directory. Under each directory of each content, an HVDVD_TS directory and an ADV_OBJ directory are disposed. By dividing the directories by contents, a plurality of contents can be stored on a single disc D without any collision.

In addition, directly under the root directory, HVDVD_TS and ADV_OBJ of a single content (which do not belong to the content division directory) are placed directly. This is to enable content reproduction in a conventional information reproducing apparatus (incompatible with reproduction of plural contents). That is, even a conventional information reproducing apparatus can reproduce a single content that does not belong to the content division directory. If the unique directory is prepared to correspond to all the contents, content reproduction in the conventional information reproducing apparatus becomes difficult.

In this specification, it is assumed that the content is identified by the zone. That is, a zone is assigned to each content. Specifically, zone # 1 is assigned to content that does not belong to the content classification directory. Zone # 2, Zone # 3,… Are each assigned to the content belonging to the content classification directory.

The disc D may store any of advanced content and standard content. In FIG. 2, advanced content is stored. Hereinafter, the data structure of the disc D for advanced content and standard content will be described separately.

a. Advanced Content Data Structure

As shown in Fig. 2, the HVDVD_TS directory stores the primary video set. The ADV_OBJ directory stores playlists, DISCID.DAT, advanced applications, advanced subtitles, and secondary video sets. DISCID.DAT should be placed directly under the ADV_OBJ directory. In addition, in the case of content having a playlist to be read from the disc D, it is preferable that at least one playlist is present directly under ADV_OBJ. In addition, a directory for advanced content can be additionally placed under the ADV_OBJ directory.

The playlist and the like will be described below.

Playlist: Playback control file written in XML language

DISCID.DAT: a configuration file describing the ID and provider ID of the disk (D).

Primary video set: consists of primary audio / video including video and audio used for playback. Primary audio / video includes main video, main audio, sub video, sub audio, subtitles, and the like.

Secondary video set: consists of video and audio to replace the primary video set. The secondary video set contains three types of data: alternate audio / video (replaces the main video and main audio), alternate audio (replaces the main audio), and secondary audio / video (replaces the sub video and sub-audio). do.

Advanced application: Data for the application used to lay out the menu button on the screen and perform trick play. This includes declarations (XML files that define what data should be used in the application), markups (XML files that define button layout, timing processing, etc.), scripts (playback control files described by ECMA scripts), picture files, effects audio (Sound effect audio files), fonts (eg, open type fonts used to display messages on the screen), and the like.

Advanced subtitle: A subtitle that is similar to subtitles superimposed on a video stream, which may likewise be described in the application in XML. The markup for advanced applications dedicated to subtitles is used.

b. Data structure of standard content

The data structure of the standard content has only the HVDVD_TS directory and no ADV_OBJ directory.

The HVDVD_TS directory of standard content, like the HVDVD_TS directory of advanced content, contains a primary video set. However, this primary video set is different from the primary video set of advanced content. The primary video set of standard content includes a video manager (VMG) and a standard VTS (STDVTS).

The video manager WG includes the following data.

Video Manager Information (VMGI)

-Video Manager Information Backup (VMGI_BUP)

First Play PGC Menu Enhanced Video Object (FP_PGCM_EVOBS)

Video Manager Menu Enhanced Video Object (VMGM_EVOBS)

Standard VTS (STDVTS) includes the following data.

Video Title Set Information (VTSI)

Video title set information backup (VTSI_BUP)

Video Title Set Menu Enhanced Video Object (VTSM_EVOBS)

Video Title Set Title Enhanced Video Object (VTSTT_EVOBS)

(2) Data structure of the content selection menu

If a plurality of contents are stored in a single disc D, the contents to be played must be selected. Here, the method of displaying the content selection menu will be examined. Specifically, when playback is started by inserting the disc D, the content selection menu is displayed. When the user selects one content among the contents described in the content selection menu, playback of the content starts.

Here, data used for displaying the content selection menu is referred to as data for the content selection menu.

3 is a diagram illustrating an example of a method of storing a content selection menu on a disc D. As shown in FIG. The directory "HDDVD_CMN" is placed just below the root directory. In the "HDDVD_CMN" directory, data for content selection menu (content management file, content name file, thumbnail picture file), and data related to these data (content metadata file (also referred to as content information file)) are disposed.

The content name file, thumbnail image file and content information file are disposed for each content. The content name file, thumbnail image file and content information file for one content have the same file name except for the extension.

a. Content management files

The content management file includes information for managing a plurality of contents (for example, file names (parts except extensions) of the content name file)). 4 is a schematic table showing information included in a content management file. The RBP, the field name, the content and the number of bytes are displayed correspondingly. RBP (Relative Byte Position) indicates the relative position of each field in bytes. Fields such as "FN_ZONE # 1" store file names of contents such as zone # 1.

This " file name " is only necessary for specifying a content name file or the like, and need not be directly used for the content selection menu. The combination of the "file name" and the extension specifies the content name file, thumbnail picture file or content information file. As described above, this is because the content name file, thumbnail image file and content information file for one content have the same file name except for the extension.

b. Content name file

The content name file is a text file for managing information about the content name of each content. The content name file is composed of a file management table and a content name, and is used when displaying a selection menu for a plurality of contents.

a) file management table (4 bytes)

The file management table is composed of, for example, four bytes and is divided into fields of a content name character set (CHRS), a content name size (TXT_SZ), and a reserved area.

CHRS: The character set code used for the content name is described (1 byte).

In "CHRS", for example, a character set code is expressed as follows.

01h: ISO / IEC 646: 1983

11h: ISO 8859-1: 1987

12h: Shift JIS Kanji (including JIS Roman [14] and JIS Katakana [13])

Other: Reserved Zone

TXT_SZ: The content name size is described in byte units (1 byte, 124 or less).

Reserved: 2 bytes

b. Content name (124 bytes or less)

The content name is information for identifying the content, and is described as text data using the character set specified in "CHRS" in the file management table. This "content name" is, for example, a title of a movie, and when displayed on the content selection menu, the user can recognize the content of the content.

c. Thumbnail image file

The thumbnail picture file includes a file of still pictures (e.g., JPEG, PNG) indicating the content of the content, and is used, for example, when the content selection menu is displayed. By preparing a characteristic thumbnail image for each content, it may be easy for a user to select content. If the content provider has previously recorded the thumbnail image on the disc D, the content selection menu can be displayed quickly. For example, when thumbnail images are generated from the contents by automatic capture, the display of the content selection menu is delayed.

The following specification can be defined for a thumbnail image file.

-JPEG image

Resolution: 720 dots or less wide, 480 dots or less high

-JPNG Burn

Resolution: 720 dots or less wide, 480 dots or less high

Penetration feature: not supported

d. Content Information File

The content information file consists of an XML document and contains detailed information of the content (eg, information about the title and casting of the movie). The content information file is used for supplying additional information of content.

(3) volume structure and directory structure

5 and 6 are schematic diagrams showing a volume structure and a directory structure of the disk D, respectively.

As shown in Fig. 5, the disc D is divided into an "HD DVD-Video" zone and other zones. Zones "HD DVD-Video" are divided into a common zone and a content correspondence zone (zone # 1, zone # 2, ...). Zone # 1 and the like are the same as Zone # 1 and the like in FIG. 2, and these zones store standard content or advanced content.

As shown in Fig. 6, zone # 1 and the like correspond to the " root / HVDVD_TS " directory and the like. Since this correspondence is the same as that of FIGS. 2 and 3, detailed description thereof will be omitted.

7 is a table showing a correspondence between the physical paths on the disc D and the directories described in the content files.

The directory described in the content file is the same (reference directory) regardless of the zone (zone # 1, zone # 2, etc.). When the zone is changed, the physical path difference on the disk D is absorbed by mounting described later.

B. Details of the data in the disk (D)

Hereinafter, the details of the data stored in the disk D will be described.

(1) DISCID.DAT

DISCID.DAT is setting information including content ID and information for setting the position where the playlist should be read.

CONFIG_ID: ID of the configuration file, described as "HDDVD-V_CONF" using the character code of ISO8859-1. 12 bytes

DISC_ID: The ID (media identifier) of the disk, described in binary representation, filled with "1b" if the network is not used. 16 bytes

PROVIDER_ID: The ID (provider identifier) of the supplier, described in binary representation, filled with "1b" if the provider ID directory in persistent storage is not used. 16 bytes

CONTENT_ID: The ID (content identifier) of the content described in binary representation, and filled with "1b" when not using the content ID directory in the persistent storage. 16 bytes

-SEARCH_FLG: This flag indicates whether or not to search the permanent storage device at the time of initial playlist search in the startup process. When not searching, "0b" is described, and when searching, "1b" is described. 1 byte

reserved: 67 bytes are reserved as a reserved area.

(2) playlist

The playlist is a reproduction control file in which information about initial system setting, information for synchronizing an object used for reproduction, and the like are described. The playlist is described in the XML language and includes playback control information indicating the playback timing of the primary video set, the secondary video set, the advanced application, the advanced subtitle, and the like.

(3) Manifest

The playlist's <Application Segment> element specifies the declaration file used for the associated application. The declaration is the initialization information of the advanced application. The information reproducing apparatus 110 activates the advanced application according to the information described in the declaration. The declaration describes, in XML language, information about markup that is executed first, information about scripts (which may be plural) that are executed in the application launch process, and the like.

(4) markup

Markup is a playback control file described in XML language. Use markup to place buttons or display messages on the screen. It is not possible to play back multiple markups simultaneously for one advanced application.

The root element of the markup is <root>, and as its child, timing information, styling information, content information, and the like are described. The content information is information about buttons and objects used in the application, and includes a <button> element, an <object> element, an <input> element, and the like. The timing information is information about the action when the button is pressed and the like, and includes an <animate> element, an <event> element, a <set> element, and the like. The styling information is information used when designating the button layout and the display size of the font, and can be realized by setting various attributes (style: fontSize style: backgroundColor, etc.) of the <style> element.

(5) script

The script is a playback control file described by the ECMA script. In HD DVD-Video, the properties defined in the ECMA script standard (values that can be referred to by name: eg, the country code of the information playback device 110 is entered in the Player.countryCode property) and the function [processing: for example, Player.playlist playback pauses when the .pause () function is called], in addition to the unique features and functionality of HD DVD-Video. The set of available features and functions is called an API.

[Operation of Information Reproducing System 100]

In the information reproducing system 100, a plurality of HD DVD-Video contents are stored in the disc D, and one of the contents can be selected and played back. When the disc D is played back on the information reproducing apparatus 110, a content selection menu (content selection menu) is displayed on the video / audio output device 120 and the playback of the content is performed by the user selecting the content to be played. Begins.

When the disk D is inserted, the following processing operations A, B, and C are executed in this order.

A. Select Content (Figure 8)

Using the content selection unit 132, one of the contents stored in the inserted disc D is selected. 8 is a flowchart showing a content selection procedure when playback starts.

(l) It is determined whether or not the multi-content is stored (step S11).

It is determined whether the number of contents stored in the disc D is plural. As the judgment basis, for example, the following conditions a and b can be used. When one or both of these conditions a and b are satisfied, it is determined whether the disc D is a multi-content disc ("DISC = multi-content"). If not, it is determined whether the disc D is a single content disc ("DISC = single content").

a. A plurality of "HDCont" ("HDCont_1", "HDCont_2", etc.) are stored.

b. A plurality of content file names are set in the content management file.

(2) Reading the content management file (step S12)

If it is determined that the disk D is a multi-content disk, the content management file is read (step S12). If a single content is stored in the disc D, playback of the content starts.

(3) Content selection (steps S13 to S15)

Based on the file name described in the content management file, the content name file and the thumbnail picture file are read (step S13), and a content selection menu is displayed on the video / audio output device 120 using these files (step S14). ). The user selects one file to be played back using the content selection menu (step S15).

9 is a diagram illustrating an example of a content selection menu. Thumbnail images of the contents 1 to 3 and selection buttons are displayed on the screen. The content is selected in response to the user's access to selecting a button using the input unit 116.

(4) Mount on the Reference Directory (Step S16)

The mount to the reference directory is done. The URI used for the content, that is, "file: /// dvddisc /", is mounted on the "HDCont" directory ("HDCont_1", etc.) of the content selected by the user. For example, the directory "HDCont_1" is stored in the setting information storage unit 117 as a reference directory. Then, data is read and reproduced from the disc D based on the reference directory stored in the setting information storage unit 117. In the case of the content of zone # 1, the root directory of the disc D is the reference directory.

After the content selection, the type of content is determined, and the content is played back.

B. Classification of Contents (Fig. 10)

HD DVD-Video defines two types of content: standard content and advanced content. Thus, when the content should be reproduced, the content type determination unit 131 of the information reproducing apparatus 110 determines the type of the target content as the starting process.

10 is a flowchart showing an example of a classification determination procedure of target content.

(1) When the disk D is inserted, it is checked whether or not the DISCID.DAT file exists (step S21). If the existence of the DISCID.DAT file is confirmed, the target content is determined as advanced content (step S22).

(2) If the existence of DISCID.DAT is not confirmed, it is checked whether or not the VMG_ID (a kind of standard content ID information) is valid (step S23). If the VMG_ID is valid, the target content is determined as standard content (step S24). If the VMG_ID is not valid, the target content is determined as unclear content (content that is neither advanced content nor standard content) (step S25).

C. Regeneration Process (Figure 11)

11 is a flowchart showing a content reproduction sequence.

(1) The DISCID.DAT file is read (step S31).

(2) It is determined whether or not the display is defined (step S32). Depending on whether the display is defined or not, the search target file is selected. The definition of the display means that the display of the video / audio output device 120 is connected to the information reproducing apparatus 110 and can be used.

(3) If the display is defined, VPLST $$$. XPL is searched and the initial playlist is determined (steps S41 to S45). Where "$$$" represents a three digit number.

-It is determined whether SEARCH_FLG in the DISCID.DAT file is 1 (step S41). The flow advances to step S43 or step S42 depending on whether SEARCH_FLG is 1 or not.

The playlist file VPLST $$$. XPL located under a specific directory of all the persistent storages ST is searched (step S42).

-The playlist file (VPLST $$$. XPL) under the ADV_OBJ directory of the disc is searched (step S43).

It is determined whether at least one VPLST $$$. XPL is found (step S44). If more than one VPLST $$$. XPL is found, an initial playlist is determined (step S45). Specifically, VPLST $$$. XPL with the largest number is defined as the initial playlist and playback starts.

(4) If no display is defined, APLST $$$. XPL is searched and the initial playlist is determined (steps S51 to S55). In these steps, APLST $$$. XPL is used instead of VPLST $$$. XPL used in steps S41 to S45.

If APLST $$$. XPL is not found, for example, playback is stopped (step S56). The operation at this time is determined according to the setting information stored in the setting information storage unit 117.

As described above, depending on the application type of content, a multi-content disc including both HD DVD-Video content and DVD-Video content may be played.

D. Download of Content

Here, the content download from the network NW is considered. Specifically, it is assumed that a plurality of contents are stored in a network server connected to the network NW. The content selected by the user among these contents is downloaded and recorded on the disc D. FIG.

At this time, it is assumed that the resource list file is stored in the network server in order to enable download of the content.

1. Resource List File

The resource list file is prepared for each content and functions as a download management file for managing the download of the content. The resource list file includes information such as the total number of files constituting the content, the total size, the download order, and the like. As a format of the resource list file, various formats such as binary format, text format, and XML format can be considered, and the same effect can be obtained regardless of the format. As an example of the XML description format, the following example is possible.

<Content>

<FILE_ Ns value = "60" />

<ADV_OBJ_Ns value = "50" />

<HVDVD_ TS_ Ns value = "10" />

<CNT_SZ value = "2000000kB" />

<ADV_ OBJ_SZ value = "500000kB" />

<HVDVD_TS_SZ value = "1500000kB" />

<File number = "1">

<RSC_URI value = "http://www.hoge.com/cont01">

…

</ File>

<File number = "2">

<RSC_URI value = "http: ///www.hoge.com/cont02" />

…

</ File>

…

</ Content>

a. "General Information" area

The area between <Content> and <File number = "1"> is an area including "general information" corresponding to one entire content. This " general information " includes " CNT_SZ " representing the total size of the content.

FILE_Ns: total number of files

ADV_OBJ_Ns: total number of "ADV_OBJ" directories

HVDVD_TS_Ns: Total number of "HVDVD_TS" directories

CNT_SZ: Total size of the content (file)

ADV_OBL_SZ: Total size of file in "ADV_OBJ" directory

HVDVD_TS_SZ: Total size of file in "HVDVD_TS" directory

b. "Individual file information" area

As described above, the content is composed of a plurality of files. For this reason, the information (individual file information) about each file which comprises content is needed.

In the above example, the area after <File number = "1"> is an area including "individual file information" corresponding to each content. "Individual file information" includes the following "RSC_URI" and the like. In the above example, description of information except for "RSC_URI" is omitted.

RSC_URI: network URI information of the file to be downloaded

DSC_URI: URI information indicating the storage location of the downloaded file on disk

LOGIC_AD: Logical address information for the downloaded file

FILE_SZ: file size

-HASH: Hash value to check whether the downloaded file is damaged

"RSC_URI",… , And "HASH" are placed for each file. For example, if three files exist, three sets of "RSC_URI" and the like are arranged.

2. Download Order

The procedure for downloading HD DVD-Video contents to the information reproducing system 100 will be described below. 12 is a flowchart showing an example of the order of downloading contents.

(1) Select content (step S61)

The content to be downloaded is selected from the content located on the server. The selected content is then downloaded.

(2) Obtaining a resource list file (step S62)

Obtain a resource list file of the downloaded content. If the resource list file cannot be obtained, exception handling follows. Further, even when a file corresponding to the selected content does not exist in the obtained resource list file, exception processing is continued.

(3) Secure the area (step S63)

An area corresponding to CNT_SZ in the resource list file is reserved on the disk D. If the required area cannot be obtained, exception handling follows.

Here, the total size of the file may be calculated using, for example, FILE_SZ without using CNT_SZ. The contents of the resource list file are not necessarily all required. For example, there may be a case where CNT_SZ does not exist.

(4) File download / record (steps S64 to S68)

The files described in the resource list file are sequentially downloaded and recorded on the disc D.

a. From the position designated by "RSC_URI", the first file of the file described in the resource list file is downloaded (step S64, temporarily stored in the data cache 113).

b. The downloaded file is checked with HASH (step S65). If the result of the check is NG, exception handling follows.

c. According to "DSC_URI", the file is recorded at the position indicated by "LOGIC_AD" (step S66).

If the file cannot be written correctly, exception handling follows. Here, "LOGIC_AD" and "DSC_URI" in the resource list file are used. However, "LOGIC_AD" does not necessarily have to be given explicitly as information in the resource list file. In other words, the files may be properly arranged.

In the above a to c, the file is temporarily stored in the data cache 113. However, without using the data cache 113, the downloaded file can also be recorded directly on the disk (D). In this case, the file recorded on the disk D is checked using "HASH".

d. Steps S64 to S66 are repeated until the downloading of all the files described in the resource list file is completed. That is, the next file is downloaded.

(5) Determination of whether or not to end downloading (step S68)

If another content is additionally downloaded, the process of step S61 or below is repeated. Otherwise, the download is terminated.

As a result of the above-mentioned downloading and recording, a disc D having the data structure shown in Fig. 2 or 3 and conforming to the HD DVD-DLV standard is prepared.

(Other Embodiments)

Embodiments of the present invention are not limited to the above-described embodiments, and the above-described embodiments may be extended and changed. Extended and modified embodiments are also included in the technical scope of the present invention.

1 is a block diagram illustrating an information reproducing system according to an embodiment of the present invention.

2 shows an example of a data structure of a disc.

3 is a diagram showing an example of a data structure of a disc storing content selection menu data;

4 is a diagram illustrating an example of a content management file.

5 shows an example of a volume structure of a disc.

6 shows an example of a directory structure of a disc.

Fig. 7 is a table showing the correspondence between the physical paths on the disc and the directories described in the content files.

8 is a flowchart showing an example of a content selection procedure.

9 shows an example of a content selection menu;

10 is a diagram illustrating an example of a target content determination procedure.

11 is a diagram illustrating an example of a content reproduction procedure.

12 is a flowchart showing an example of a content download procedure.

<Explanation of symbols for main parts of the drawings>

100: information playback system 110: information playback device

111: data access manager 112: navigation manager

113: Data Cache 114: Presentation Engine

115: AV renderer 116: Input unit

117: setting information storage unit 120: video / audio output device

131: content type determination unit 132: content selection unit

133: content playback unit

Claims (6)

A plurality of content files respectively corresponding to the plurality of contents, A plurality of playlist files for controlling the reproduction of each of the plurality of contents; Directories or files provided to cope with the plurality of contents Information storage medium comprising a. The information storage medium of claim 1, wherein the directory is composed of a plurality of directories that respectively store the plurality of content files. The information storage medium of claim 1, wherein the file is a content management file managing a selection from the plurality of contents. 4. The information storage medium according to claim 3, wherein the content management file has information for identifying a content name file corresponding to the name of the content and a thumbnail picture file corresponding to the thumbnail image of the content. Reading information of the directory or file from the information storage medium according to claim 1, Based on the read information, determining whether the number of contents in the information storage medium is plural; If it is determined that the number of contents is plural, displaying an image prompting the selection of the contents; In response to the displayed image, inputting information regarding the selection of the content; Playing the content based on the playlist file corresponding to the selected content Information playback method comprising a. Acquiring, by the recording apparatus, a download management file which manages the download of the content; Downloading, by the recording device, a file corresponding to the content, based on the download management file; Recording the downloaded file on an information storage medium to become the information storage medium according to claim 1; Method of manufacturing an information storage medium comprising a.

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