JP2009004035A - Information storage medium, its manufacturing method, and information reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information storage medium convenient for reproducing a plurality of contents, its manufacturing method, and an information reproducing method. <P>SOLUTION: A recording medium is provided with a plurality of content files corresponding to a plurality of contents, a plurality of playlist files for controlling reproduction of the plurality of contents, a setting file containing a multicontent identifier indicating that contents are plural and content number information indicating the number of contents, and a content management file for managing selection of the plurality of contents. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information storage medium capable of reproducing a plurality of contents, a manufacturing method thereof, and an information reproducing method.

2. Description of the Related Art Optical discs (information storage media) on which content such as movies and music are written and disc playback devices (information playback devices) that play back the optical discs are used. Here, a plurality of contents may be recorded on a recording medium and played back (see, for example, Patent Document 1).
As for optical discs, a rapid transition from the DVD standard to a larger capacity HD DVD standard has progressed, and many HD DVD-Video contents have been produced and sold.
JP 2006-40473 A

By the way, as a result of an increase in the capacity of the optical disk, it has become easier to write a plurality of contents on the optical disk in terms of capacity.
However, for example, the HD DVD standard does not consider storing and reproducing a plurality of contents on one optical disk. For this reason, it is difficult to say that an optical disc, an information reproducing apparatus, etc. are convenient for reproducing a plurality of contents.
In view of the above, an object of the present invention is to provide an information storage medium convenient for reproducing a plurality of contents, a manufacturing method thereof, and an information reproducing method.

  The recording medium according to an aspect of the present invention includes a plurality of content files respectively corresponding to a plurality of contents, a plurality of playlist files for controlling reproduction of the plurality of contents, and a plurality of contents. A setting file having a multi-content identifier to be represented, content number information representing the number of contents, and a content management file for managing selection of the plurality of contents.

  An information reproduction method according to an aspect of the present invention includes a plurality of content files respectively corresponding to a plurality of contents, a plurality of playlist files for controlling reproduction of the plurality of contents, and a plurality of contents. The content management file from an information storage medium comprising a setting file having a multi-content identifier representing the content number information representing the number of contents, and a content management file for managing selection of the plurality of contents A step of reading, a step of displaying an image prompting selection of content based on the read content management file, a step of inputting information for selecting content corresponding to the displayed screen, Playlist file corresponding to the selected content Based on the Le, characterized by comprising the steps of: reproducing the content.

  ADVANTAGE OF THE INVENTION According to this invention, the information storage medium convenient for reproduction | regeneration of several content, its manufacturing method, and an information reproduction method can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing an information reproduction system 100 according to an embodiment of the present invention.
The information reproduction system 100 includes a disk D, a persistent storage ST, an information reproduction 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.
The video / audio output device 120 is a display device (for example, a liquid crystal display device or a plasma display) or an audio output device (for example, a speaker or headphones).

  The data access manager 111 controls data access to the disk D, persistent storage ST, and 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 storing information), and download data from the network NW.

  The data access manager 111 inputs data (for example, data according to the HD DVD-Video format) from these data sources (disk D, persistent storage ST, network NW), navigation manager 112, data cache 113, presentation The output is distributed to the engine 114. A playback control file or the like described in XML (eXtended Markup Language) or ECMA (European Computer Manufacturers Association) script (playlist, manifest, markup, script, etc. described later) is sent from the data access manager 111 to the navigation manager 112. (Directly or indirectly via data cache 113).

The navigation manager 112 includes a content type determination unit 131, a content selection unit 132, and a content playback unit 133, and controls content playback.
The content type determination unit 131 determines the type of content such as the disc D. The content selection unit 132 can select a plurality of contents in the disc D using a content selection menu. Details of content type determination and content selection will be described later.
The content playback unit 133 controls playback of the selected content, interprets the playback control file sent from the data access manager 111, generates a playback control command, and outputs it to the presentation engine 114. The content playback unit 133 receives an input (user operation) from the input unit 116 (keyboard, remote controller, etc.), generates a playback control command, and outputs the playback control command 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 output contents of video and audio from the playback control command and data used for playback (such as a primary video set and a secondary video set described later), and converts them into information that can be used for playback. The reproduction data stored in the disk D or the like is multiplexed with video and audio. The presentation engine 114 selects data such as video and audio necessary for reproduction, and restores the multiplexed data (demax). The demultiplexed data is encoded with various codecs (compression methods). For this reason, the presentation engine 114 decodes (decodes) the demultiplexed data. The presentation engine 114 generates playback data and the like based on the decoded data and the playback control command from the navigation manager 112, and sequentially outputs them to the AV renderer 115.

The AV renderer 115 performs video superposition and audio mixing, and outputs them to the video / audio output device 120.
The input unit 116 is input means such as a keyboard and a remote controller.
The setting information storage unit 117 stores setting information related to reproduction and the like. The setting information includes reference directory information described later. The disk D is mounted according to the information of the reference directory.
The video / audio output device 120 outputs video and audio in accordance with a signal from the AV renderer 115.

  The disc D is, for example, a read-only or writable DVD standard or HD DVD standard optical disc. As a writable optical disk, the following can be used for the disk D, for example.

・ DVD recording 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.

The disc D can record both HD DVD-Video standard content and HD DVD-DLV standard content.
1) HD DVD-Video standard
The HD DVD-Video standard defines two types of content called standard content and advanced content.

  Standard content is positioned as an extended version of the DVD standard, and the data structure is close to the DVD standard. For this reason, standard content is likely to be accepted by studios that produced DVDs. However, standard content has higher video and audio quality and usable navigation commands (instructions used in title jumps and menus) than DVD.

  Advanced content has a data structure different from the DVD standard. In advanced content, in addition to improving the quality of video and audio like standard content, playback control information can be expressed in programming languages such as XML and ECMA script, like a homepage on the Internet. In addition, in the advanced content of HD DVD-Video, content from the persistent storage ST and the network NW can be reproduced in addition to the disc D.

2) HD DVD-DLV standard
The HD DVD-DLV standard defines HD DVD-DLV content. The HD DVD-DLV content means content obtained by copying or downloading content recorded in a storage other than the disc D (for example, a server connected to the network NW) to the disc D. Even with the HD DVD-DLV standard, multiple contents can be stored on a single disc D. HD DVD-DLV content includes standard content and advanced content as well as HD DVD-Video content.
The HD DVD-DLV content includes one or more HD DVD-Video content, a content name file, a thumbnail image file, and a content information file, which will be described later.

A. Outline of Data Structure of Disc D (1) Content Data Structure 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 that can store a plurality of contents.

  A directory for each content (content division directory (HDCont_1, HDCont_2, etc.)) is arranged directly under the root directory. The HVDVD_TS directory and ADV_OBJ directory are arranged under the content division directory. By dividing the directory for each content, a plurality of contents can be stored on one disc D without colliding.

  Also, HVDVD_TS and ADV_OBJ of one content are arranged immediately below the root directory (not belonging to the content division directory). This is because the content can be played back on a conventional information playback device (not compatible with playback of multiple content). That is, even a conventional information reproducing apparatus can reproduce one content that does not belong to the content division directory. If a unique directory is associated with all the contents, it is difficult to reproduce the contents with the conventional information reproducing apparatus.

  Here, contents are identified by zone. That is, a zone is assigned for each content. Specifically, zone # 1 is assigned to content that does not belong to the content division directory. Zone # 2, zone # 3,... Are assigned to each content belonging to the content division directory.

  The disc D can store both advanced content and standard content. In FIG. 2, advanced content is stored. Hereinafter, the data structure of the disc D will be described by dividing it into advanced content and standard content.

1) Advanced Content Data Structure As shown in FIG. 2, the HVDVD_TS directory stores a primary video set. The ADV_OBJ directory stores playlists, DISCID.DAT, advanced applications, advanced subtitles, and secondary video sets. DISCID.DAT must be placed directly under the ADV_OBJ directory. In addition, in the case of content that needs to read a playlist from the disc D, it is preferable that at least one playlist exists directly under ADV_OBJ.
A directory for advanced content can be arranged under the ADV_OBJ directory.
Hereinafter, playlists and the like will be described.

Play list: A playback control file written in XML language.
DISCID.DAT: Setting file that describes the ID and provider ID of disk D

  Primary video set: Consists of primary audio video including data such as video and audio used for playback. The primary audio video is composed of main video (main video), main audio (main audio), sub video (sub video), sub audio (sub audio), sub picture (subtitle), and the like.

  Secondary video set: Consists of data such as video and audio intended to replace the primary video set. There are three types of secondary video sets: substitute audio video (replace main video and main audio), substitute audio (replace main audio), and secondary audio video (replace sub video and sub audio).

  -Advanced application: Data for an application for placing menu buttons on the screen or performing trick play. Manifest (XML file that defines what data is used in the application), markup (XML file that defines button layout and timing processing), script (playback control file written in ECMA script), image file, It consists of effect audio (sound file for sound effects), font (open type font used when displaying a message on the screen, etc.) and the like.

  • Advanced subtitle: Subtitles that can be described as an application in XML, separately from subtitles (sub-pictures) that are tailored to the video stream. An advanced subtitle markup is used in which the markup for the advanced application is specialized for subtitles.

2) Data structure of standard content Standard content has only HVDVD_TS directory and no ADV_OBJ directory.

  The standard content HVDVD_TS directory includes the primary video set as in the advanced content. However, this primary video set is different from the primary video set of advanced content. Standard content primary video sets include Video Manager (VMG) and Standard VTS (STDVTS).

The video manager (VMG) contains 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 content selection menu data When a plurality of contents are stored in one disc D, it is necessary to select the content to be reproduced. Here, a method of displaying the content selection menu is considered. That is, when the disc D is inserted and playback is started, the content selection menu is displayed. When the user selects one content from the contents listed in the content selection menu, the reproduction of the content is started.

Here, the data used for displaying the content selection menu is referred to as content selection menu data.
FIG. 3 is a diagram showing a storage example of content selection menu data on the disc D. As shown in FIG. The “HDDVD_CMN” directory is placed directly under the root directory. In the “HDDVD_CMN” directory, content selection menu data (content management file, content name file, thumbnail image file) and data related thereto (content metadata file (also referred to as content information file)) are arranged.

  The content name file, thumbnail image file, and content information file are arranged corresponding to each content. For one content, the content name file, the thumbnail image file, and the content information file have the same file name except for the extension.

1) Content management file The content management file includes information for managing a plurality of contents (for example, a file name such as a content name file (a part from which an extension is omitted)).

FIG. 4 is a schematic diagram showing the contents of the content management file.
RBP, field name, content, and number of bytes are represented correspondingly. RBP (Relative Byte Position) represents the relative position of each field in bytes. The file name of the content such as zone # 1 is stored in a field such as “FN_ZONE # 1”.

  The “file name” only needs to specify the content name file or the like, and does not need to be used directly in the content selection menu. A content name file, a thumbnail image file, and a content information file are specified by a combination of the “file name” and the extension. This is because, as described above, the content name file, the thumbnail image file, and the content information file have the same file name except for the extension for one content.

2) Content name file The content name file is a text file for managing information related to 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 a plurality of content selection menus are displayed.

a. File management table (4 bytes)
The file management table is composed of, for example, 4 bytes, and is divided into fields of a content name character set (CHRS), a content name size (TXT_SZ), and a reserved area (reserved).
・ CHRS: Describes the character set code used for the content name (1 byte)
In “CHRS”, for example, a character set code is represented 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: Reserve • TXT_SZ: Describes the size of the content name in bytes (1 byte, 124 or less)
-Reserved area (reserved): 2 bytes

b. Content name (124 bytes or less)
The content name represents information for identifying the content, and is described by text data using a character set specified by “CHRS” of the file management table. The “content name” is, for example, a movie title and can be displayed on the content selection menu to allow the user to recognize the content.

3) Thumbnail image file The thumbnail image file is a still image (for example, JPEG, PNG) file representing the contents of the content, and is used when a content selection menu is displayed. By preparing a characteristic thumbnail image for each content, the user can easily select the content. Since the content provider records thumbnail images on the disk D in advance, the content selection menu can be quickly displayed. For example, if a thumbnail image is generated by automatic capture from content, the display of the content selection menu tends to be slow.

The standard for thumbnail image files can be specified as follows.
・ JPEG image Resolution: width 720 dots or less, height 480 dots or less

・ JPNG image Resolution: width 720 dots or less, height 480 dots or less Transparent function: Not supported

4) Content information file The content information file is composed of an XML document, and includes detailed information of the content (for example, information on the title of the movie and the performer). The content information file is used when supplying additional content information.

(3) Volume structure and directory structure FIGS. 5 and 6 are schematic views showing the volume structure and 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. The “HD DVD-Video” zone is divided into a shared zone and a content support zone (zone # 1, zone # 2,...). Zone # 1 and the like are the same as zone # 1 and the like in FIG. 2 and 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 not different from that in FIGS. 2 and 3, detailed description thereof is omitted.

FIG. 7 is a diagram showing the correspondence between the physical path on the disk D and the directory described in the content file.
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, a difference in physical path on the disk D is absorbed by mounting described later.

B. Details of Data on Disk D Details of data stored on the disk D will be described below.
(1) DISCID.DAT
DISCID.DAT is a setting file for setting the content ID and where the playlist is read from.

・ CONFIG_ID: ID of the configuration file. It is described as “HDDVD-V_CONF” in ISO8859-1 character code. 12 bytes.
DISC_ID: ID (medium identifier) of the disk described in binary representation. When not using the network, fill it with “1b”. 16 bytes.
PROVIDER_ID: Provider ID (provider identifier) described in binary representation. If the provider ID directory in the persistent storage is not used, fill it with “1b”. 16 bytes.
CONTENT_ID: Content ID (content identifier) described in binary representation. If the provider ID directory in the persistent storage is not used, fill it with “1b”. 16 bytes.
SEARCH_FLG: A flag indicating whether or not to search in the persistent storage when searching for an initial playlist in the startup process. Enter “0b” if not searching, and “1b” if searching. 1 byte.
• reserved: 67 bytes are left as a reserved area.

(2) Playlist A playlist is a playback control file for describing information related to initial system settings, synchronization information between objects used for playback, and the like. The playlist is described in XML language, and includes playback control information such as when to play back the primary video set, secondary video set, advanced application, advanced subtitle, and the like.

(3) Manifest In the <ApplicationSegment> element of the playlist, specify the manifest file used in the application. The manifest is initialization information for the advanced application. The information reproducing apparatus 110 activates the advanced application according to the information described in the manifest. In the manifest, information on the markup that is executed first, information on the script (s) executed in the application start process, and the like are described in the XML language.

(4) Markup Markup is a playback control file described in XML language. Markup is used to place buttons and display messages on the screen. A plurality of markups cannot be reproduced simultaneously for one advanced application.

  The root element of markup is <root>, and timing information, styling information, content information, etc. are described in the child. Content information is information about buttons and objects used in the application, such as <button> element, <object> element, <input> element, and the like. Timing information is information related to the behavior when the button is pressed, such as <animate> element, <event> element, and <set> element. Styling information is information used to specify the button layout and font display size, and is realized by setting various attributes (style: fontSize, style: backgroundColor, etc.) of the <style> element Can be made.

(5) Script A script is a playback control file described by an ECMA script. In HD DVD-Video, properties (values that can be referenced by name: example Player.countryCode property contains the country code of the information playback device 110) and functions (processing: example Player.playlist.pause ( (In addition, playback is paused when a function is called), and HD DVD-Video specific properties and functions can be used. A set of properties and functions that can be used is called an API.

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

When the disk D is inserted, processing is executed in the following order of A, B, and C.
A. Content selection (Figure 8)
For the inserted disc D, the content is selected using the content selection unit 132.
FIG. 8 is a flowchart showing a content selection procedure.

(1) Determination of multiple contents (step S11)
It is determined whether or not the number of contents stored in the disc D is plural. For this determination, for example, the following conditions 1) and 2) can be used. When either or both of these conditions 1) and 2) are satisfied, it is determined that the disc D is a multiple content disc (“DISC = multiple content”). Otherwise, disc D is determined to be a single content disc (“DISC = single content”).

1) Multiple "HDCont"("HDCont_1","HDCont_2", etc.) must be stored 2) Multiple content file names must be set in the content management file

(2) Reading content management file (step S12)
If it is determined that there are a plurality of contents, the contents management file is read (step S12). When it is determined that a single content is stored on the disc D, the reproduction of the content is started.

(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 image file are read (step S13), and the content selection menu is displayed on the video / audio output device 120 using these (step S13). S14). Using the content selection menu, one content to be reproduced by the user is selected (step S15).

  FIG. 9 is a diagram illustrating an example of a content selection menu. Thumbnail images of contents 1 to 3 and buttons for selection are displayed on the screen. The content is selected when the user selects and accesses a button with the input unit 116.

(4) Mount on the reference directory (step S16)
Mount to the base directory.
Mount the URI “file: /// dvddisc /” used in the content 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, based on the reference directory stored in the setting information storage unit 117, data is read from the disk D and reproduced.
In the case of the contents of zone # 1, the root directory of the disc D is the reference directory.

  After the above selection of content, content type determination and content reproduction are performed.

B. Content type determination (FIG. 10)
HD DVD-Video defines two types of content: standard content and advanced content. For this reason, the content type determination unit 131 of the information playback apparatus 110 determines which content is the target content as a start process during content playback.

FIG. 10 is a flowchart showing an example of the target content determination procedure.
(1) When the disk D is inserted, it is confirmed whether or not a DISCID.DAT file exists (step S21). If the DISCID.DAT file exists, it is determined that the target content is advanced content (step S22).

(2) If DISCID.DAT does not exist, it is confirmed whether VMG_ID (a kind of standard content ID information) is valid (step S23). If VMG_ID is valid, it is determined as standard content (step S24). If VMG_ID is not valid, it is determined that the content is unknown (that is neither advanced content nor standard content of HD DVD) (step S25).

C. Reproduction process (Fig. 11)
FIG. 11 is a flowchart showing a procedure for reproducing content.
(1) A DISCID.DAT file is read (step S31).
(2) It is determined whether a display is defined (step S32). The search target file is selected according to whether the display is defined. The definition of the display means that the display unit of the video / audio output device 120 is connected to the information reproducing device 110 and is in a usable state.

(3) If a display is defined, VPLST $$$. XPL is searched and an initial playlist is determined (steps S41 to S45). “$$$” means a three-digit number.
It is determined whether SEARCH_FLG in the DISCID.DAT file is 1 (step S41). Depending on whether SEARCH_FLG is 1, the process proceeds to steps S43 and S42.

Search for a playlist file (VPLST $$$. XPL) under a specific directory in all persistent storages ST (step S42).
Search for a playlist file (VPLST $$$. XPL) directly under the ADV_OBJ directory in the disc (step S43).
It is determined whether one or more VPLST $$$. XPL has been found (step S44). When one or more VPLST $$$. XPL is found, an initial playlist is determined (step S45). That is, playback starts with the largest playlist in VPLST $$$. XPL as the initial playlist.

(4) If the display is not defined, APLST $$$. XPL is searched and an initial playlist is determined (steps S51 to S55). In these steps, APLST $$$. XPL is used instead of VPLST $$$. XPL in steps S41 to S45.
If APLST $$$. XPL is not found, for example, playback is stopped (step S56). The behavior at this time is determined by the setting information in the setting information storage unit 117.

  As described above, a plurality of content discs in which HD DVD-Video content and DVD-Video content are mixed can be played in accordance with the content application type.

D. Content Download Now, consider downloading content from the network NW. That is, 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 from these is downloaded and recorded on the disc D.
At this time, it is assumed that a resource list file is stored in the network server in order to enable downloading of contents.

(1) Resource list file A 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 and size of files constituting the contents, and the download order. There are various resource list file formats such as binary format, text format, and XML format, but the same effect can be obtained with any format. The following can be considered as an example of the description format in XML.

<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>

1) "Overall information" area
After <Content> and before <File number = “1”> is an area including “whole information” corresponding to the entire content of one. This “whole information” includes “CNT_SZ” indicating 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 content (file)
ADV_OBJ_SZ: Total size of files in the “ADV_OBJ” directory
HVDVD_TS_SZ: Total size of files in the “HVDVD_TS” directory

2) “Individual file information” area As described above, content is composed of a plurality of files. For this reason, information (individual file information) of each file constituting the content is required.

  In the above example, the area after <File number = “1”> includes “individual file information” corresponding to each content. “Individual file information” includes the following “RSC_URI” and the like. In the previous example, descriptions other than “RSC_URI” are omitted.

-RSC_URI: Network URI information of the file to be downloaded-DSC_URI: URI information of the storage location of the downloaded file on the disk-LOGIC_AD: Logical address information of the downloaded file-FILE_SZ: File size-HASH: Downloaded file is not broken Hash value to check for

  “RSC_URI”,..., “HASH” are arranged for each file. For example, if there are three files, three sets of “RSC_URI” are arranged.

(2) Downloading Procedure Hereinafter, a procedure for downloading HD DVD-Video content in the information reproducing system 100 will be described.
FIG. 12 is a flowchart showing an example of a content download procedure.

(1) Content selection (step S61)
Select the content you want to download from the content on the server. The content is downloaded below.

(2) Acquisition of resource list file (step S62)
Get the resource list file of the content to be downloaded. If the resource list file cannot be acquired, exception handling is performed. Exception processing is also performed when there is no file corresponding to the selected content in the acquired resource list file.

(3) Reserve area (step S63)
An area for CNT_SZ in the resource list file is secured on the disk D. If the necessary area cannot be secured, exception handling is performed.

  Here, the total file size may be calculated using FILE_SZ, for example, without using CNT_SZ. The contents of the resource list file are not all indispensable. For example, CNT_SZ may not exist.

(4) File download / record (steps S64 to S68)
The files listed in the resource list file are downloaded in order and recorded on the disk D.

  1) The first file listed in the resource list file is downloaded from the location specified by “RSC_URI” (step S64, temporary storage in the data cache 113).

  2) The downloaded file is checked with HASH (step S65). If the check is NG, exception handling is performed.

3) A file is recorded in accordance with “DSC_URI” at the location of “LOGIC_AD” (step S66). If it cannot be recorded correctly, exception handling is performed.
Here, “LOGIC_AD” and “DSC_URI” in the resource list file are used. However, “LOGIC_AD” does not necessarily have to be explicitly given as information in the resource list file. As a result, it is sufficient that the files are properly placed.

  In the above 1) to 3), the file is temporarily stored in the data cache 113. On the other hand, the downloaded file may be directly written on the disk D without using the data cache 113. In this case, the file recorded on the disk D is checked using “HASH”.

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

(5) Download completion determination (step S68)
If another content is downloaded, step S61 and subsequent steps are repeated. If not, the download ends.
As a result of the above download and recording, a disk D having the data structure shown in FIGS. 2 and 3 and conforming to the HD DVD-DLV standard is created.

(Other embodiments)
Embodiments of the present invention are not limited to the above-described embodiments, and can be expanded and modified. The expanded and modified embodiments are also included in the technical scope of the present invention.

It is a block diagram showing the information reproduction system concerning one embodiment of the present invention. It is a figure which shows the example of the data structure of a disc. It is a figure which shows the example of the data structure of the disc which stored the data for content selection menus. It is a figure which shows an example of a content management file. It is a figure which shows an example of the volume structure of a disk. It is a figure which shows an example of the directory structure of a disk. It is a figure showing the correspondence of the physical path on a disc, and the directory described in a content file. It is a flowchart showing an example of a content selection procedure. It is a figure which shows an example of a content selection menu. It is a figure which shows an example of the discrimination | determination procedure of object content. It is a figure which shows an example of the reproduction | regeneration procedure of a content. It is a flowchart showing an example of the procedure of content download.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Information reproduction system, 110 ... Information reproduction apparatus, 111 ... Data access manager, 112 ... Navigation manager, 113 ... Data cache, 114 ... Presentation engine, 115 ... AV renderer, 116 ... Input part, 117 ... Setting information storage part, DESCRIPTION OF SYMBOLS 120 ... Video / audio output device 131 ... Content type determination part, 132 ... Content selection part, 133 ... Content reproduction part

Claims (6)

A plurality of content files respectively corresponding to a plurality of contents;
A plurality of playlist files for controlling reproduction of each of the plurality of contents;
A directory or file corresponding to the number of contents, and
An information storage medium comprising: The information storage medium according to claim 1, wherein the directory is a plurality of directories that respectively store the plurality of content files. The information storage medium according to claim 1, wherein the file is a content management file for managing selection of the plurality of contents. 4. The information storage medium according to claim 3, wherein the content management file includes information for identifying a content name file corresponding to a content name and a thumbnail image file corresponding to a thumbnail image of the content. Reading the directory or file information from the information storage medium according to any one of claims 1 to 4,
Determining whether the number of contents in the information storage medium is plural based on the read information;
Displaying an image prompting selection of content when the number of the content is determined to be plural;
Inputting information for selecting content corresponding to the displayed screen;
Replaying the content based on the playlist file corresponding to the selected content;
An information reproducing method comprising: The information recording device acquiring a download management file for managing download of content;
A step in which the information recording device downloads a file corresponding to the content based on the acquired download management file;
Creating the information storage medium according to any one of claims 1 to 4 by writing the downloaded file to the information storage medium;
A method for manufacturing an information storage medium, comprising:

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