JP4536720B2 - Information recording medium on which multipass data is recorded, information recording apparatus and reproducing apparatus - Google Patents

Description

  The present invention relates to multi-pass implementation, and more particularly, to a data recording apparatus and playback apparatus that support multi-pass, and an information recording medium on which the data is recorded.

  Multipath means that there are a plurality of data reproduction paths, and examples include language credit and multiangle. A DVD, which is a typical conventional recording medium using multi-pass, records each multi-pass data in a certain size and is recorded by an interleaving method in which the multi-pass data is alternately recorded. The reason for using the interleaving method is that when a path switching command is input from the user, it reacts quickly and reproduces the corresponding path commanded by the user. However, when the recording medium is made so as to have a multi-pass structure having different reproduction times without the restriction on the position where the data is stored in the information recording medium, each is not an interleaving method. A multi-pass can be implemented by a method of separately recording data about the pass.

  FIG. 1 is a diagram showing a data structure of a DVD which is a typical example using multipath by an interleaving method. As shown in FIG. 1, a DVD, which is one of multimedia recording media, divides a disc into a VMG area 110 and a plurality of VTS areas 120a-120n, and title information and information about the title menu are displayed in the VMG area 110. In addition, it can be seen that information about the title is stored in a plurality of VTS areas 120a-120n. Normally, the VMG area 110 includes 2-3 files, and each VTS area 120a-120n includes 3-12 files.

  FIG. 2 is a detailed configuration diagram of the VMG area shown in FIG. As shown in FIG. 2, in the VMG area 110, a VMGI (Video Management Group information) area 112 that stores additional information about the VMG area 110, a VOBS (Video Object Subtitle) area 114 that stores moving image information related to the menu, and It can be seen that there is a VMGI backup area 116. Each of these areas 112, 114, 116 exists in one file, but among them, the VOBS area 114 does not necessarily have to exist and may not exist in some cases.

  FIG. 3 is a detailed configuration diagram of the VTS area shown in FIG. As shown in FIG. 3, the VTS area 120n includes video title set information (VTSI) 310, VOBS for Menu 320 which is presentation data for menu screens, VOBS for Title 330 which is VTS video information and VTSI backup 340. Can be seen. The presence of VOBS for Menu 320 for displaying the menu screen is optional. The VOBS for Title 330 is divided into a VOB that is a recording unit and a cell. One VOB includes a plurality of cells. The smallest unit among the recording units used in the present invention is a cell.

  FIG. 4 is a diagram illustrating a video title formed by connecting a plurality of PGCs for playback control of a video object of a video title by an interleaving method. As shown in FIG. 4, when one PGC is reproduced and then the next PGC is reproduced, if one of a plurality of PGCs can be selected and reproduced, which DVD is selected as a command to the DVD. Can be saved. Controlling the playback order in this way is called navigation. The command for determining the playback order is stored in PGCI (Program Chain Information).

  FIG. 5 is a diagram illustrating a structure of PGC data by the interleaving method. As shown in FIG. 5, it can be seen that the PGC is stored in a structure called PGCI 510. The PGCI 510 includes a pre-command 512 that stores navigation commands, a post command 516, and a plurality of programs 514a to 514n. The pre-command 512 is a command that is performed before a specific program reproduction of the corresponding PGC, and the post command 516 is a command that is performed after the program reproduction of the corresponding PGC. Each program 514a-514n includes a plurality of pieces of reproduction cell information. This reproduction cell has a one-to-one correspondence with a recording cell in a VOB that is a recording unit. A playback cell, which is each playback unit, has a playback cell command (Cell Command: CC) that is executed after the cell is played back. As described above, PGCI hierarchically describes PGCs as playback units, and associates playback cells as the lowest playback unit with playback cells as the lowest unit of recording units. In particular, the PGC is composed of a plurality of cells that are playback units. At this time, a plurality of reproduction cells of the program 514 can form a pass block.

  FIG. 6 is a diagram illustrating a path block.

  A plurality of cells are arranged in parallel, and a portion for reproducing one reproduction cell is called a pass block. The playback cells forming the path block may have the same length of playback time, but may have different lengths of playback time, and correspond to each path. When a playback cell as a playback unit forms a pass block, a VOB and a recording cell as a recording unit are sequentially recorded by an interleaving method for each pass.

  FIG. 7 is a diagram illustrating an example of a presentation data reproduction path.

  The presentation engine reproduces the presentation data based on the presentation command performed by the navigation manager. Continuous presentation data is located in continuous logical sectors in the reading order during the recording of multi-pass presentation data. Although the presentation data can be divided into a plurality of recording cells, the navigation manager issues a presentation command based on one recording cell. Accordingly, the presentation data reproduction path is determined by the order of the recording cells defined in the PGC.

  FIG. 7 shows multipath in one movie, and one of the different recording cells is reproduced based on navigation (reproduction command) data. “Language credit” represents a case in which movie playback differs depending on the language. That is, when information about the characters or people who participated in the production is displayed in subtitles after the movie is over, it is possible to determine in which language the information is displayed with language credits. As another example, when a character sees a newspaper or magazine, the language credit can be used to play a Korean newspaper or a English newspaper can be played. “Director's Cut” represents a special order specified by the producer, and “Multi Angle” represents a movie shot with a camera at multiple angles. Such presentation data is reproduced without interruption of data along various paths. Such data reproduction is called seamless reproduction.

  The multi-angle data can be changed so that other angle data is reproduced by the user's selection during the reproduction of the movie, but the language determined by the language credit cannot be changed by the user's command or selection during the reproduction. Therefore, the reproduction path is not changed.

  FIG. 8 is a diagram illustrating a layout of presentation data when seamless reproduction is performed by a multipath interleaving method. As shown in FIG. 8, it can be seen that the presentation data is recorded after being interleaved. The presentation engine sequentially reads the interleaved data of the angle that is currently reproduced and reproduces the presentation data along the designated reproduction path while skipping unnecessary data. If it is assumed that the path 1 810 is reproduced, the interleaved data ILVU1 811, ILVU2 812, and ILVU3 813 for the path 1 810 are jumped, and the interleaved data ILVU1 821, ILVU2 822, and ILVU3 823 for the path 2 820 are jumped. Play while skipping. While jumping, the presentation engine needs a track buffer to prevent the presentation data supplied to the decoder from being cut off.

  In order to implement multipath, when multipath data is subdivided into a certain unit and saved in an interleaving method, even when playback is specified by one playback path, the data corresponding to the playback path is not Since they are not recorded continuously, a change in the reproduction position, that is, a jump between cells must be repeated in order to read data for one path. At this time, in a reproducing apparatus that takes time to change the position, such as an optical medium or a hard disk, the bit rate of the compressed bit stream is limited to compensate for this.

  The problem to be solved by the present invention is to provide a data recording device, a reproducing device, and information on which the data is recorded, by separating and recording a presentation stream corresponding to each path and embodying multi-pass more effectively than the conventional method. A recording medium is provided.

  In order to solve the above problems, an information recording medium according to the present invention is an information recording medium on which presentation data for multipass is recorded, a plurality of playlists in which reproduction path information for the plurality of paths is recorded, and The presentation data includes at least one clip that is a recording unit, the playlist includes at least one play item, and the clip corresponding to the play item is recorded in a continuous recording space of an information recording medium. Yes.

  In order to solve the above problems, an information recording medium according to the present invention is an information recording medium on which presentation data for multi-pass is recorded, at least one clip which is a recording unit of presentation data for each pass, And additional information in which information about a path block which is a set of reproduction path information of each path is recorded, and the presentation data for each path is pre-selected without moving to a different path. Only one pass is continuously reproduced, and the additional information is recorded in a separate space from the presentation data.

  In order to solve the above problems, a playback apparatus according to the present invention is a playback apparatus that plays back information in which presentation data for multi-pass is recorded, a reading unit that reads the presentation data, and playback of the read presentation data. A playback unit that reads and plays back a clip, which is a recording unit of the presentation data, according to playlist information in which a route is recorded, and the clip is recorded in a continuous recording space of an information recording medium.

  In order to solve the above problems, a recording apparatus according to the present invention includes a processing unit that processes AV data to create presentation data in a recording apparatus that records information on which presentation data for multi-pass is recorded, and the presentation. A recording unit is provided that records a clip, which is a unit for configuring and recording data, in a continuous recording space of an information recording medium.

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

  The presentation data is enormous in volume and is stored or transmitted as a compressed bit stream after being compressed. In the present invention, the terms clip and play item are used as recording units, and play lists and play items are used as playback units. In this case, a clip corresponds to a cell that is a recording unit on DVD, and a playlist and a play item have the same concept as a program and cell that are a playback unit on DVD. That is, an AV stream is recorded in clip units on the information recording medium according to the present invention. Normally, clips are recorded in a continuous space for each clip. The AV stream is compressed and recorded in order to reduce the capacity. In order to reproduce the recorded clip, it is necessary to know the characteristic information of the compressed presentation data. Therefore, clip information is recorded for each clip. The clip information includes audio and video attributes of each clip, and an entry point map that records position information of entry points that can be randomly accessed in a certain section unit. In the case of MPEG, which is often used as a moving picture compression technique, an entry point is a GOP (Group Of Picture) header or I picture used as a random access point in MPEG. The entry point map is mainly used for time searching for a point where a certain amount of time has elapsed after the start of reproduction.

  FIG. 9 is a diagram illustrating the correlation among playlists, play items, clip information, and clips. In FIG. 9, a playlist 910 is a basic unit of reproduction. The information recording medium according to the present invention stores a plurality of playlists. One play list includes a plurality of play items 920. The play item corresponds to a part of the clip. Specifically, the play item is used as a form for designating a reproduction start time and an end time in the clip.

  FIG. 10 is a diagram illustrating an example of a playlist having a multipath structure according to the present invention. As shown in FIG. 10, it can be seen that the play items constituting one play list usually have a sequential structure. However, as shown in FIG. 10, when making a multi-pass, a plurality of play items constitute a pass block 1010. The pass block is a block including play items for various routes, and one play item belonging to this block is reproduced along a route determined in advance at the time of reproduction. A path change cannot occur between the play items belonging to the pass block during playback. That is, in the path block, it is impossible to switch to another path during reproduction by a user input signal.

  The play items constituting the pass block may be configured to have the same length of playback time, or may be configured to have different lengths of playback time. Presentation data clips are not interleaved and are recorded separately in continuous spaces. Therefore, as shown in FIG. 8, in the present invention, the play item clip of each path block is compared with the interleaving block (ILUV1-3 of the first path) which is not continuously and sequentially recorded. As shown in FIG. 10, the data is recorded in a continuous area.

  FIG. 11 is a diagram illustrating an example of information on a playlist having play items that form a pass block and information held by play items included in the pass block. As shown in FIG. 11, it can be seen that the play item included in the pass block has pass block information in addition to the normal play item information. This pass block information basically includes information on whether or not the corresponding play item forms a pass block. As shown in FIG. 10, the clips referred to by the play items that make up the pass block must be recorded sequentially. Among the play items that make up a playlist, a plurality of play items that make up a pass block are basically played back when one of the play items is played, and as described above, within the same pass block, There is no conversion between play items.

  FIG. 12 is a diagram illustrating an example in which a playlist that is a reproduction unit is configured for each path. As shown in FIG. 12, it can be seen that the play items belonging to the play list do not include a pass block, and each play list is configured corresponding to one pass instead.

  FIG. 13 is a diagram showing the structure of a playlist constituting the route shown in FIG. 12 according to the present invention. As shown in FIG. 13, it can be seen that the playlist corresponding to the one path is separately recorded from the normal playlist because path information about which path is represented is recorded separately. When playing presentation data, one of the multi-pass playlists is basically selected and played, and as described above, between the playlists for the same multi-pass playlist. No change occurs.

  As described above, the recording unit of presentation data forming a multi-pass is recorded separately in a continuous space of the information recording medium, and the multi-pass is included in the playback unit information to be played back by connecting the corresponding recording units. If the information is added, the playback device that plays back the information can play back the multipath data as the following operation.

  The information necessary for path selection is recorded in a separate space from the presentation data for playback of multi-pass presentation data, so additional information is read from the recording medium before starting the presentation data playback. After saving to memory, the same path data is tracked and played back. Each clip, which is a recording unit, has presentation data connection information for each path that constitutes a pass block. If a path is selected and playback is started before the playback of the corresponding presentation data is started, Play the clip continuously.

  In addition, multi-pass presentation data is recorded in a continuous space without clips that represent each pass, so that data can be read and played back in a continuous space. Encoding is possible without discrimination from general presentation data that is not. Therefore, in order to continuously reproduce one pass, there is no encoding restriction such that presentation data must be divided into a certain size and interleaved.

  The recording apparatus of the present invention uses the above-described clip data and additional information for path determination (for example, path information), reproduction unit information (for example, path) in order to create a playlist in a corresponding path (FIG. 12). (Playlist having information) is recorded on an information recording medium. As a preferred embodiment, information on playback units constituting a multi-path is configured and recorded, and at this time, a plurality of play items corresponding to each clip are configured, and after configuring a pass block, they are connected. Create a playlist or create a separate playlist for each pass.

  FIG. 14 is another diagram illustrating the correlation between a playlist, a play item, and a clip.

  Each playlist includes at least one play item. The play item refers to a clip. Depending on the value of the language credit, playlist 1 1410 may be played back, and playlist 2 1420 may be played back. A part of the play items 1422, 1424, and 1426 constituting the playlist 2 and the play items 1412, 1414, and 1416 constituting the playlist 1 can designate the same clip. This is because the parts that must be played differently depending on the language credit are part, and it is sufficient to make only those parts in separate clips.

  As shown in FIG. 14, play item 1 1412 of playlist 1 1410 refers to clip 1 that is the same clip as play item 2 1422 in playlist 2 1420. Also, play item 3 1416 of playlist 1 1410 refers to clip 4 which is the same clip as play item 3 1426 in playlist 2 1420. Then, play item 2 1414 of playlist 1 1410 points to clip 2, and play item 2 1424 of playlist 2 1420 points to clip 3. That is, the scene where the Korean newspaper is viewed is clip 2, and the scene where the English newspaper is viewed is clip 3. Therefore, clip 1 and clip 4 can be shared by playlist 1 and playlist 2.

  At this time, what playlist is to be reproduced is recorded in advance in the system parameters of the movie object. That is, since the language credit information is stored in the system parameters, for example, the playlist 1 1410 is reproduced if the value represents Korean, and the playlist 2 1420 is reproduced if the value represents English.

  FIG. 15 is a block diagram of the playback apparatus of the present invention.

  The playback apparatus includes a reading unit 1510 and a playback unit 1520. The reading unit 1510 reads presentation data, and the playback unit 1520 uses a playlist information in which a playback path of the read presentation data is recorded. Is read and played. At this time, the clip is recorded in a continuous recording space of the information recording medium.

  Also, the playback unit 1520 plays back at least one clip as a recording unit in which presentation data for each pass is stored, and the information area included in the clip includes information about points that can be randomly accessed. The entry point information is recorded, and one pass is reproduced sequentially. Then, the play item corresponding to each one clip and the play list information composed of the plurality of play items are added as information in a reproduction unit to reproduce the recorded data, and the play item is the clip The information about the fact that a plurality of play items form one pass block is recorded as information for a plurality of passes, and the playback device records a plurality of play blocks constituting the pass block. When playing an item, one of the play items is played.

  Also, the playback unit 1520 plays back data recorded by adding play items corresponding to one clip and playlist information including the plurality of play items as information in units of playback, and playing the play items. Designates all or part of the clip, and one playlist is recorded so as to correspond to one path, and the playback device plays back the playlist corresponding to the corresponding path.

  FIG. 16 is a block diagram of the recording apparatus of the present invention.

  The recording apparatus includes a recording unit 1610 and a processing unit 1620. The processing unit 1620 processes the AV data and creates presentation data. Then, the recording unit 1610 records a clip, which is a unit for forming and recording the presentation data, in a continuous recording space of the information recording medium. The recording unit 1610 includes at least one clip as a recording unit in which presentation data for each pass is stored, each of the play items corresponding to the one clip, and playlist information including the plurality of play items. Are added and recorded as information on a reproduction unit, and information for a plurality of passes is recorded as information about a plurality of play items forming one pass block. Then, the play item corresponding to one clip and the play list information composed of the plurality of play items are added and recorded in the information of the reproduction unit, and the information for the plurality of passes includes the plurality of play items. Recorded as information about making one pass block.

  In addition, the recording unit 1610 records the play item corresponding to one clip and the play list information including the plurality of play items as information in units of reproduction, and records one play list in one path. Record as appropriate. The process of the present invention in which the functional units shown in FIGS. 15 and 16 are implemented may be implemented by computer hardware and / or software. In particular, a programmable computer processor can record, read and reproduce according to the present invention. Further, the functional unit described with reference to FIGS. 15 and 16 can be implemented by a single recording / reproducing apparatus.

  The present invention can also be embodied as computer-readable code on a computer-readable recording medium. Computer readable recording media include all types of recording devices that can store data that can be read by a computer system. Examples of computer-readable recording media include ROM (Read Only Memory), RAM (Random Access Memory), CD (Compact Disc) -ROM, magnetic tape, floppy disk, and optical data storage device. In addition, it may be embodied in the form of a carrier wave (for example, transmission through the Internet). Further, the computer-readable recording medium is distributed in computer systems connected via a network, and the computer-readable code can be stored and executed in a distributed manner.

  So far, the present invention has been described with a focus on preferred embodiments thereof. Those skilled in the art will appreciate that the present invention can be embodied in modified forms without departing from the essential characteristics of the invention. Accordingly, the disclosed embodiments should be considered in an illustrative, not a limiting sense. The scope of the present invention is shown not in the above description but in the claims, and all differences within the equivalent scope should be construed as being included in the present invention.

  According to the present invention described above, presentation data representing multipath and additional information for determining a path are recorded in a separate space, and the presentation data is recorded separately in a continuous space without interleaving. Therefore, it is easy to arrange the recording space, and since there is no frequent jump between clips generated during interleaving recording, presentation data representing multipath can be read more efficiently.

It is a figure which shows the data structure of DVD which is a typical example using a multipath by the interleaving method. FIG. 2 is a detailed configuration diagram of a VMG (Video Management Group) area shown in FIG. 1. FIG. 2 is a detailed configuration diagram of a VTS (Video Title Set) area shown in FIG. 1. It is a figure which shows the video title which consists of a connection of several PGC (Program Chain) for the reproduction | regeneration control of the video object of a video title by the interleaving method. It is a figure which shows the structure of the PGC data by the interleaving method. It is a figure which shows a pass block. It is a figure which shows the example of the reproduction path | route of presentation data. It is a figure which shows the layout of presentation data when seamless reproduction | regeneration is performed by the interleaving method by multipass. It is a figure which shows the correlation of a play list, play item, clip information, and a clip. It is a figure which shows an example of the playlist which has a multipath structure by this invention. It is a figure which shows the example of the information of the play list which has the play item which makes a pass block, and the information which the play item contained in the pass block has. It is a figure which shows the example which comprised the play list which is a reproduction | regeneration unit according to each path | pass. It is a figure which shows the structure of the play list which comprises the path | route shown in FIG. 12 by this invention. It is another figure which shows the correlation of a play list, a play item, and a clip. It is a block diagram of the reproducing | regenerating apparatus of this invention. It is a block diagram of the recording apparatus of this invention.

Claims (16)

In an information recording medium on which presentation data for multi-pass is recorded,
At least two clips containing presentation data corresponding to different paths in different languages;
At least two playlists including a playlist having one or more play items including a first play item and a playlist having one or more play items including a second play item;
The first play item includes information indicating a playback section of one of the two clips, and the second play item includes information indicating a playback section of another clip of the two clips. One playlist corresponds to one pass, and at least two playlists constitute a multi-pass,
One of the two or more playlists is determined and reproduced according to a movie object.   2. The information recording medium according to claim 1, wherein some of the play items belonging to different playlists specify the same clip. In an information recording medium on which presentation data for multi-pass is recorded,
At least two clips containing presentation data corresponding to different paths in different languages;
At least two playlists including a playlist having one or more play items including a first play item and a playlist having one or more play items including a second play item;
One playlist corresponds to one path, and includes additional information in which information about a path block that is a set of reproduction path information of each path is recorded,
In the presentation data for each path, only one preselected path is continuously reproduced without moving to different paths, and the additional information is recorded in a separate space from the presentation data. One of the above playlists is determined and reproduced according to a movie object.   4. The information recording medium according to claim 3, wherein the clip is continuously recorded in a continuous recording space of the information recording medium.   4. The information recording medium according to claim 3, wherein the clip is recorded in a continuous space of the information recording medium for each data clip for each pass.   4. The information recording medium according to claim 3, wherein the additional information is information about a plurality of passes, which is information about a plurality of play items forming one pass block. In a playback device for playing back information recorded with presentation data for multi-pass,
A reading unit for reading the presentation data;
One of at least two playlists including a playlist having one or more play items including a first play item and a playlist having one or more play items including a second play item. Therefore the playlist, comprising at least a reproduction unit for reproducing the two clips containing presentation data corresponding to different paths in different languages,
The first play item includes information indicating a playback section of one of the two clips, and the second play item includes information indicating a playback section of another clip of the two clips. One playlist corresponds to one pass, and at least two playlists constitute a multipath,
One of the two or more playlists is determined and reproduced according to a movie object . The playback unit
At least one clip is played as a recording unit in which presentation data for each pass is stored, and entry point information, which is information about points that can be randomly accessed, is recorded in the information area included in the clip. The playback apparatus according to claim 7 , wherein one path is sequentially played back. The playback unit
The play item corresponding to each one clip and the play list information formed from the plurality of play items are added to the playback unit information to reproduce the recorded data, and the play item is the clip. Is recorded for information on a plurality of passes, and information on the fact that a plurality of play items form one pass block, and the playback unit selects the pass block. The playback apparatus according to claim 7 , wherein when playing a plurality of play items, one of the play items is played. The playback unit
The play item corresponding to each one clip and the play list information formed from the plurality of play items are added to the playback unit information to reproduce the recorded data, and the play item is the clip. The whole or a part is designated, and one play list is recorded so as to correspond to one pass, so that the reproduction unit reproduces the play list corresponding to the corresponding path. Item 8. The playback device according to Item 7 . Wherein the playlist includes information about the playback path corresponding to each play list, the reproduction unit, according to claim 1 0, characterized in that for reproducing a playlist corresponding to the relevant path Playback device. In a recording device for recording information in which presentation data for multi-pass is recorded,
Comprising at least two clips and a processing unit for processing at least two playlists;
Each clip includes presentation data corresponding to different paths in different languages, and one playlist of the playlist has at least one play item including a first play item, The other play list includes at least one play item including a second play item, and the first play item includes information indicating a playback section of one of the two clips, and the second play item includes the second play item. The item includes information indicating a playback section of another clip of the two clips, one playlist corresponds to one path, and a multipath is configured by at least two playlists .
One of the two or more playlists is determined and reproduced according to a movie object. The processor is
The recording apparatus according to claim 1 2, characterized by recording additional information of multi-path specifying the path block including the playitem. The processor is
An information about the multi-pass recording described above in recording playlist so as to correspond to the one path, to claim 1 2, characterized by further recording the additional information represents a specific path apparatus. In a method for providing non-interleaved multi-pass presentation data recorded on an information recording medium,
Recording at least two clips including presentation data corresponding to different paths in different languages;
Recording at least two playlists including a playlist having one or more play items including a first play item and a playlist having one or more play items including a second play item; ,
Sharing a portion of the clips of different playlists for the corresponding path by concatenating different playlists with the same clip for one path;
Seamlessly playing at least one clip of the route without changing the route when playing the presentation data for the corresponding route through the playlist,
The first play item includes information indicating a playback section of one of the two clips, and the second play item includes information indicating a playback section of another clip of the two clips. One playlist corresponds to one pass, and at least two playlists constitute a multi-pass,
One of the two playlists is determined and played according to a movie object.   The information recording medium according to claim 1, wherein the reproduction section is defined by a reproduction start time and a reproduction end time.

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