KR20050100651A - Recording medium having data structure for managing reproduction duration of still pictures recorded thereon and recording and reproducing methods and apparatuses - Google Patents

Abstract

The present invention relates to a recording medium having a data structure for managing the reproduction period of a recorded still picture, and thus a recording and reproducing method and apparatus. The data structure includes a playlist area in which at least one playlist is stored. The playitem provides navigation information for indicating at least one still picture from the first file to be reproduced, provides period information for displaying the still picture, and the subplayitem provides audio data from the second file. Provide navigation information for playback.

Description

Recording medium having a data structure for managing the reproduction period of a recorded still picture, and recording and reproducing method and apparatus according to the recording and reproducing methods and apparatuses

The present invention relates to a recording medium having a data structure for managing reproduction of at least still pictures recorded on the recording medium, and thus a recording and reproducing method and apparatus.

In recent years, standardization of new high-density playback-only or rewritable optical discs capable of storing high-quality video data and high-quality audio data in high capacity has been rapidly developed, and products related to new optical discs are expected to be commercialized soon. Examples of such new optical discs include re-writable Blu-ray Disc Rewritable (BD-RE) and read-only Blu-ray Disc (BD-ROM).

Although the standard of the BD-RE has been published, standardization work for high-density playback-only optical discs such as the BD-ROM is still ongoing. However, no effective solution for the data structure for managing the reproduction of still pictures recorded on the high-density reproduction-only optical disc has yet been prepared.

1 shows a file or data structure of a recording medium according to the present invention,

FIG. 2 shows a recording medium having the data structure of FIG. 1;

3 illustrates a specific embodiment of a part of the data structure of FIG. 1 and a method of managing still images for a high density recording medium,

4 illustrates an embodiment according to the present invention in which display period information is included in a still picture map.

5 illustrates an embodiment according to the invention in which still image files are associated with two still picture maps,

6 illustrates an embodiment according to the present invention in which display period information is included in a playlist or a playitem.

7 illustrates a JPEG file including graphic data,

8 illustrates a packet stream and an MPEG2 transport stream multiplexed with one graphic data and a plurality of subtitle data,

9 illustrates a structure of a PES packet according to the present invention,

10 schematically shows some components of an optical disk reproducing apparatus to which the present invention is applied;

11 shows another embodiment of a recording and reproducing apparatus according to the present invention.

Accordingly, the present invention was created in view of the above circumstances, and the recording medium according to the present invention includes a data structure for managing reproduction of at least still pictures recorded on the recording medium.

In one embodiment of the present invention, the recording medium includes a playlist area for storing at least one playlist. The playlist includes at least one playitem and at least one sub playitem. The playitem provides navigation information for indicating at least one still picture from the first file to be reproduced, provides period information for displaying the still picture, and the subplayitem provides audio data from the second file. Provide navigation information for playback.

In one embodiment, the period information indicates whether to display the still picture for a limited time or an infinite time. Further, when the period information indicates displaying the still picture for a limited time, the period information may indicate a length of time for which the still picture is displayed.

In another embodiment, the recording medium includes a data area for storing presentation data divided into a plurality of still picture units. Each still picture unit includes at least one still picture and associated associated data. The navigation area of the recording medium includes at least one playlist, and the playlist includes at least one playitem. The playitem indicates at least one of the still picture units, and provides period information for displaying the still picture in the still picture unit.

In another embodiment, the related data includes graphical data, subtitle data, and the like.

In another embodiment, the playlist further includes at least one sub playitem, the sub playitem providing navigation information for playing the audio data from the second file.

In one embodiment, the period information indicates whether to display the still picture for a limited time or an infinite time. Further, when the period information indicates displaying the still picture for a limited time, the period information may indicate a length of time for which the still picture is displayed.

Further, an apparatus and method for recording and reproducing a data structure according to the present invention and for recording and reproducing a slideshow according to the present invention are provided.

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

A high density recording medium such as a high density optical disc according to the present invention, such as a BD-ROM, a BD-RE, or the like, has a file or data structure for managing reproduction of video and audio data, as shown in FIG. The data structure according to the present invention as shown in FIG. 1 is similar in many respects to the data structure of the known BD-RE standard. Therefore, although this part is examined, detailed description is abbreviate | omitted.

As shown in Fig. 1, the root directory contains at least one BD directory. The BD directory includes general files (not shown), a PLAYLIST directory in which playlist (for example, * .mpls) files are stored, a CLIPINF directory in which a clip information file (* .clpi) is stored, and a clip information file. There is a STREAM directory in which A / V stream clip files (* .m2ts) of MPEG-2 format corresponding to are stored.

The STREAM directory includes A / V stream clip files in MPEG-2 format called clips or clip files, and the A / V stream includes video and audio source packets. For example, a source packet of video data includes a header and a transport packet. The source packet includes a source packet number, which is generally a number sequentially assigned to serve as an address for accessing the source packet. The transport packet includes a Packet Identifier (PID), and the PID identifies a sequence of transport packets to which the transport packet belongs. Each transport packet in the sequence has the same PID.

The CLIPINF directory includes a clip information file associated with each A / V stream file. The clip information file includes the type, sequence information, program information, and timing information of the associated A / V stream. The sequence information describes sequences of arrival time criteria (ATC) and system time criteria (STC). For example, the sequence information indicates the number of sequences, the start and end time information of each sequence, the address of the first source packet in each sequence, and the PID of the transport packet in each sequence. A sequence of source packets with a constant content of a program is called a program sequence. The program information indicates the number of program sequences, the start address of each program sequence, and the PID of the transport packet in the program sequence.

The timing information is called characteristic point information (CPI). One type of CPI is an entry point (EP) map. The EP map may include a presentation time stamp (PTS) based on arrival time (ATC) and / or system time (STC), for example, a source packet such as a source packet number (SPN). Map to an address The presentation time stamp (PTS) and source packet number (SPN) are associated with an entry point (EP) in the A / V stream. That is, the PTS and its associated SPN indicate an entry point (EP) of the A / V stream. The packet pointed to is often called an entry point packet.

The PLAYLIST directory contains one or more playlist files. Playlists are a concept introduced to easily edit or combine clips for playback. The playlist file is a collection of playing intervals in the clips, and each playing interval is called a playitem. The playlist file identifies each playitem that forms a playlist, each playitem having an IN-point indicating a location on the time axis of the clip file, such as, for example, a presentation timestamp relative to ATC or STC. It is a pair of OUT-points. The playlist file may also include a sub-playitem that also provides a pair of IN-points and OUT-points that point to locations on the time axis of the clip file. In other words, the playlist file identifies the playitem and sub-playitem, and each playitem or sub-playitem points to one clip file or part thereof and identifies a clip information file associated with the clip file. The clip information file is used to link the playitem to a clip file of a source packet. The playlist may also include a playlist mark that points to a specific location (eg, a specific address) within the clip file.

A general information file (not shown) provides general information for managing reproduction of A / V streams recorded on the optical disc.

In addition to illustrating the data structure of the recording medium according to the present invention, Fig. 1 shows regions of the recording medium. For example, the general information file is recorded in at least one general information area, the PLAYLIST directory is recorded in at least one PLAYLIST directory area, and each playlist in the PLAYLIST directory is stored in at least one playlist area of the recording medium. Is recorded. FIG. 2 shows an example of a recording medium having the data structure of FIG. As shown in Fig. 2, the recording medium includes a file system information area, a database area, and an A / V stream area. The database area includes a general information file, a playlist information area, and a clip information area. In the general information file and playlist information area, a general information file in the general information file area, a PLAYLIST directory and a playlist file in the playlist information area are recorded. In the clip information area, a CLIPINF directory and related clip information files are recorded. In the A / V stream area, A / V streams of various titles are recorded.

Video and audio data are generally organized into separate titles. For example, different movies represented by video and audio data are organized into different titles. In addition, a title can be organized into several chapters, just as a book is usually organized into chapters.

Since the storage capacity of new high-density recording media such as BD-ROM and BD-RE is very large, several versions of a title or part of one title can be stored and reproduced. For example, video data of different camera angles may be recorded on the recording medium, or in another example, some versions relating to different versions or different languages for a title may also be recorded on the recording medium. As another example, a director's version or a theater version of a title may also be recorded on the recording medium. Alternatively, a full adult version, a semi-adult version, and a youth version, or portions of a title, for a title may be recorded on the recording medium. Each version, each camera angle, etc. has a different playback path, and the video data in this case is called Multiple Reproduction Path Video Data.

Because of the large storage capacity of new high-density recording media such as BD-ROMs, still or still pictures can be organized and / or user-interactive, such as for example in slideshows. Can be recorded and played back. According to the present invention, a data structure for managing reproduction of still pictures in a high density optical disc recording medium is described together with the method and apparatus invention according to the present invention relating to recording and reproduction of still pictures.

3 illustrates an embodiment of a data structure and method for managing still images of a high density recording medium such as a BD-ROM. As shown in Fig. 3, a clip includes a clip file which is a still picture file and a clip information file. The clip file includes still picture data files (e.g., JPEG data files) and related data files (e.g., graphics and subtitle data files), which are grouped into still picture units and synchronized with each other. Is played back. In the example of FIG. 3, each still picture unit includes one still picture (eg, a JPEG file). Also, the files in each still picture unit share the same file name except for file name extentions. The file name extension of each file is determined by the type of file. For example, one still picture unit includes a JPEG image file named '01001.JPG', a graphic image file named '01001.GRP', and a caption data file named '01001.SUT'.

As further shown in Fig. 3, a still picture map (SP_map: Still Picture map) is included in a clip information file associated with the clip file. The still picture map specifies the display order of the still picture units. In particular, the still picture map includes a list of still image file names for specifying the display order of the still picture units. In the list, the file names are sorted in the same order as the order in which the still picture units are displayed, for example in a slide show associated with the still picture map.

The still picture map is associated with a playitem of a playlist for controlling playback of the still image file. The subplayitems of the playlist may be associated with audio streams recorded in separate MPEG2 transport streams. As shown in Fig. 3, the PlayItems in the playlist may include in-picture (IN_picture) information and out-picture (OUT_picture) information corresponding to the start position and end position of the still image in the still picture file to be played, respectively. Include. The IN_picture information and the OUT_picture information provided by the playitem link the playitem to a still picture map of a clip information file associated with the still picture clip file. In addition, the sub playitem (SubPlayItem) in the playlist includes sub-playitem in-time information (SubPlayItem_IN_time) and sub-playitem out-time information (SubPlayItem_OUT_time) information for a separate audio file to be reproduced in association with the still picture file. Include. The audio data may be reproduced with or without synchronization with the associated still image.

As illustrated in FIG. 4, each SP map item of the still picture map SP_map may further include display period information for specifying a display duration of each still picture unit. The period information indicates whether the associated still picture unit is to be displayed for either limited or infinite time. In the case of a limited time, the length of the limited time can be provided. In the infinite time, the playback device plays back the still picture unit until a user input is received.

In addition, as shown in FIG. 4, the still picture unit, together with related data such as graphic data and caption data, may display various types of still images (eg, JPEG images, thumbnail picture images, etc.). It may include.

5 illustrates an embodiment in which still image files are associated with two or more still picture maps. In FIG. 5, the still picture files include the first still picture map SP_map # 1 included in the first clip information Clip_Info # 1 and the second still picture map included in the second clip information Clip_Info # 2. SP_map # 2) may be duplicated. The order of file names in the form of a list in the first still picture map SP_map # 1 may be different from the order of file names in the form of a list in the second still picture map SP_map # 2.

Since there are multiple still picture maps for the same still image files, the same still picture unit can be reproduced in a different order. In this case, the display period information for the still picture unit is included in a playlist or playitem associated with the corresponding still picture map, as described in detail below.

As illustrated in FIG. 6, the PlayItem in the playlist may include in picture (IN_picture) information and out picture (OUT_picture) information corresponding to a start position and an end position of a still picture in a still picture file to be played. Include. The IN_picture information and OUT_picture information provided by the playitem connect the playitem to a still picture map of a clip information file associated with the still picture clip file. In addition, a sub playitem (SubPlayItem) in the playlist may be played in association with the still picture file, for example, a sub playitem in-time information (SubPlayItem_IN_time) and a subplay for a separate audio file (not shown). The item out time information (SubPlayItem_OUT_time) information is included. The audio data may be reproduced with or without synchronization with the associated still image.

The playlist also includes a plurality of playlist marks PlayListMark. The playlist mark indicates the start of the still picture unit and may provide duration information for the associated still picture unit as described above. For example, the display period for each still picture unit may be recorded in the period information field of the playlist mark included in the associated playlist. Alternatively or additionally, a period information field may be included in the associated playitem to record the period information. The period information indicates whether the associated still picture unit is to be displayed for either limited or infinite time. In the case of a limited time, the length of the limited time can be provided. In the infinite time, the playback device plays back the still picture unit until a user input is received.

If the playitem provides navigation information for reproducing two or more still picture units, and the display period is different for each still picture unit, the display period information for the still picture unit may be stored as a list in the playitem. Otherwise, the display period information may be recorded in one byte. In this case, a flag, for example, 'Share_flag' may be additionally assigned to designate which of the two duration information methods is valid.

7 illustrates a JPEG file including graphic data. In the header of a JPEG still image file (eg 01001. JPG), graphic image data may be included with an application marker, an application marker length, and a BD-ROM ID code. JPEG image data and graphic data are each generated and merged into one JPEG file. The graphic image data stream is recorded in a graphic file (* .GRP) as one graphic unit, and may be recorded in a packetized elementary stream (PES) packet type, or only a payload of a PES packet may be recorded.

8 illustrates a packet stream and an MPEG2 transport stream in which one graphic data and a plurality of subtitle data are multiplexed. The graphic file may include one graphic unit and a plurality of language units (Lingual_Units # 1 to #k) corresponding to subtitle data streams (Subtitles # 1 to #k) of multiple languages. have. In the graphic file, the graphic unit and the plurality of language units may be sequentially recorded in a private packet stream or may be recorded in an MPEG2 transport stream constituting a transport packet.

9 shows the structure of a PES packet according to the present invention. The display time of the caption data is determined by a presentation time stamp (PTS) and a decoding time stamp (DTS) included in a header of a corresponding PES packet. In a browsable slide show in which the display period of each still image is varied by the user's key input (for example, displayed until the user's input is received), the PTS is set to '0x00000000' because it is meaningless. .

As shown in FIG. 9, the payload of the PES packet may include cut in time and cut out time information for caption data. The cut-in time and cut-out time information designating a time at which the subtitle appears and disappears is a relative time based on the PTS.

Fig. 10 schematically shows some components of an optical disc reproducing apparatus to which the present invention is applied. As shown, the optical disk apparatus includes an optical pickup 11 for reproducing data from the optical disk. The VDP (Video Disc Play) system 12 controls the reproduction operation of the optical pickup 11 and decodes the data reproduced by the optical pickup 11. The VDP system 12 reproduces the AV stream and applies it to the D / A converter 13 to generate an analog AV stream.

The VDP system 12 controls the optical pickup 11 and decodes the reproduced data based on the user input received via the user interface and the navigation and management information recorded on the optical disc according to the present invention. For example, when performing a slide show, the VDP system 12 reproduces still picture images whose names are included in the still picture map with reference to the still picture map SP_map, wherein the still picture unit Are played back in the order they are displayed. The VDP system 12 may reproduce each still picture unit for a limited or infinite time according to the period information, as in the above-described embodiment.

11 shows a configuration of an optical disc recording and reproducing apparatus according to the present invention. The A / V encoder 9 receives and encodes data (for example, still picture data, audio data, and the like), and outputs the encoded information to the multiplexer 8 together with coding information and stream attribute information. The multiplexer 8 multiplexes the encoded data on the basis of the input coding information and the stream attribute information, for example, to create an MPEG-2 transport stream. A source packetizer 7 packetizes the transport packets input from the multiplexer 8 into source packets that conform to the audio video format of the optical disc. As shown in FIG. 11, the operation of the A / V encoder 9, the multiplexer 8, and the source packetizer 7 is controlled by the controller 10. When the controller 10 receives a write command from the user, the controller 10 sends control information to the A / V encoder 9, the multiplexer 8, and the source packetizer 7. For example, the controller 10 instructs the A / V encoder 9 which type of encoding to execute, instructs the multiplexer 8 which transport stream to create, and the source packetizer 7. Indicates the format of the source packet. The controller 10 also controls the driver 3 to record the output of the source packetizer 7 on the optical disk.

The controller 10 also generates navigation information and management information for managing reproduction of data being recorded on the optical disk. For example, based on information received via an interface with a user (commands stored on a disk or provided by a computer system via an intranet or the Internet), the controller 10 may display the optical disk in FIGS. The driver 3 is controlled to write one or more of nine data structures.

During reproduction, the controller 10 controls the driver 3 to reproduce the data structure. That is, based on the information contained on the disc and the user input received through a user interface (operating buttons of the recording and reproducing apparatus or remote control associated with the apparatus), the controller 10 causes the driver to reproduce data from the optical disc. (3) to control. For example, as described with reference to an embodiment of the present invention, one still image or still images may be reproduced in association with audio data based on the navigation information. In addition, one still image or a group of still images may be reproduced as a slideshow or part of a slideshow. As also explained, the slideshow can be played back or browsable in synchronization.

The source depacketizer 4 receives the reproduced source packet and converts it into a data stream such as an MPEG-2 transport packet stream. Demultiplexer 5 demultiplexes the data stream into encoded data. The A / V decoder 6 decodes the encoded data into original data. During playback, the operation of the source depacketizer 4, the demultiplexer 5, and the A / V decoder 6 is controlled by the controller 10. When the controller 10 receives a playback command from the user, the controller 10 sends control information to the source depacketizer 4, the demultiplexer 5, and the A / V decoder 6. For example, the controller 10 instructs the source depacketizer 4 to format a source packet, instructs the multiplexer 5 a transport stream to demultiplex, and the A / V decoder. Indicate (6) the decoding type to be executed.

Although FIG. 11 illustrates a recording and reproducing apparatus, a dedicated recording apparatus or a dedicated reproducing apparatus may also be provided which provides only a recording operation or a reproduction operation with only a part of the components of FIG.

As described above, the present invention provides a recording medium having a data structure for managing still images recorded on a high density recording medium (for example, a high density optical disc such as a BD-ROM). For example, the data structure allows for displaying still images and possible audio data in various ways.

The method for managing still images of a high-density recording medium according to the present invention provides various still control operations such as playback period or duration management, and efficiently reproduces still images in conjunction with subtitle data or graphic images. To be able.

The present invention also provides a method and apparatus for recording a data structure on a high density recording medium for managing still images recorded on the recording medium.

The present invention also provides a method and apparatus for reproducing a still image recorded on a high density recording medium on the basis of the data structure recorded on the recording medium for managing reproduction of the still image.

The above-described preferred embodiments of the present invention have been disclosed for the purpose of illustration, and can be extended to other optical discs other than the BD-ROM, and those skilled in the art can further describe the present invention disclosed in the appended claims. Within the spirit and the technical scope, various other embodiments may be improved, changed, replaced or added.

Claims (27)

A recording medium having a data structure for managing a reproduction period of a still picture, A playlist area for storing at least one playlist, Here, the playlist includes at least one playitem and at least one sub-playitem, wherein the playitem provides navigation information for indicating at least one still picture from a first file to be reproduced, and the still picture And period information for displaying the information, and the sub playitem provides navigation information for reproducing audio data from the second file. The method of claim 1, And a data area for storing the first file and the second file. The method of claim 1, The playitem provides navigation information for reproducing the presentation data from the first file, wherein the presentation data includes at least a still picture and associated associated data. The method of claim 3, wherein And the related data comprises graphic data. The method of claim 3, wherein And the related data includes subtitle data. The method of claim 3, wherein The presentation data is divided into one or more still picture units, each still picture unit comprising at least one still picture and associated associated data. The method of claim 1, And a data area for storing the first file that does not contain audio data. The method of claim 1, And the period information indicates whether to display the still picture for a limited or infinite time period. The method of claim 8, And when the period information indicates displaying the still picture for a limited time, the period information indicates a length of time for displaying the still picture. A recording medium having a data structure for managing a reproduction period of a still picture, A playlist area for storing at least one playlist file, Here, the playlist file includes at least one playitem and at least one sub-playitem, wherein the playitem provides navigation information for indicating at least one still picture from a first data stream to be reproduced, And period information for displaying a still picture, wherein said sub playitem provides navigation information for reproducing an audio stream from a second data stream separate from said first data stream. The method of claim 10, And the period information indicates whether to display the still picture for a limited or infinite time period. The method of claim 11, And when the period information indicates displaying the still picture for a limited time, the period information indicates a length of time for displaying the still picture. A recording medium having a data structure for managing a reproduction period of a still picture, A data area for storing presentation data; And A navigation area for storing at least one playlist, Here, the presentation data is divided into a plurality of still picture units, each still picture unit includes at least one still picture and associated related data, and the related data does not include audio data, And the playlist includes at least one playitem, the playitem indicating at least one still picture unit to be reproduced and providing period information for displaying a still picture in the still picture unit. The method of claim 13, And said related data in at least one still picture unit comprises graphic data. The method of claim 13, And said related data in at least one still picture unit comprises caption data. The method of claim 13, And the data area stores the presentation data in a first clip file and stores audio data in a second clip file. The method of claim 16, And said playlist further comprises at least one sub-playitem, said sub-playitem providing navigation information for reproducing audio data from said second clip file. The method of claim 13, Wherein each still picture unit contains only one still picture. The method of claim 13, And the period information indicates whether to display the still picture for a limited or infinite time period. The method of claim 19, And when the period information indicates displaying the still picture for a limited time, the period information indicates a length of time for displaying the still picture. A recording medium having a data structure for managing a reproduction period of a still picture, A data area for storing presentation data in a first clip file and storing audio data in a second clip file; And A navigation area for storing at least one playlist, Here, the presentation data is divided into a plurality of still picture units, each still picture unit includes at least one still picture and associated related data, Here, the playlist includes at least one playitem and at least one sub-playitem, the playitem providing navigation information for indicating the presentation data from a first clip file to be played and instructed to play it. And period information for displaying each still picture, wherein the sub playitem provides navigation information for reproducing audio data from a second clip file. The method of claim 21, And the period information indicates, for each still picture, whether the still picture is to be displayed for a limited or infinite time period. The method of claim 22, And when the period information of the playitem indicates displaying the still picture for a limited time, the period information indicates a length of time for displaying the still picture. A method of recording a data structure on a recording medium for managing a reproduction period of at least one still picture, the method comprising: Recording at least one playlist on the recording medium, Here, the playlist includes at least one playitem and at least one sub-playitem, wherein the playitem provides navigation information for indicating at least one still picture from a first file to be reproduced, and the still picture And period information for displaying the information, wherein the sub playitem provides navigation information for reproducing audio data from a second file. A method of reproducing a data structure for managing a reproduction period of at least one still picture recorded on a recording medium, the method comprising: Playing at least one playlist from the recording medium, Here, the playlist includes at least one playitem and at least one sub-playitem, wherein the playitem provides navigation information for indicating at least one still picture from a first file to be reproduced, and the still picture And period information for displaying the information, wherein the sub playitem provides navigation information for reproducing audio data from a second file. An apparatus for recording a data structure on a recording medium for managing a reproduction period of at least one still picture, the apparatus comprising: A driver for driving optical recording means for recording data on the recording medium; And A controller for controlling the driver to record at least one playlist on the recording medium, Here, the playlist includes at least one playitem and at least one sub-playitem, wherein the playitem provides navigation information for indicating at least one still picture from a first file to be reproduced, and the still picture And period information for displaying the information, and the sub playitem provides navigation information for reproducing audio data from a second file. An apparatus for reproducing a data structure for managing a reproduction period of at least one still picture recorded on a recording medium, the apparatus comprising: A driver for driving optical reproducing means for reproducing data recorded on the recording medium; And A controller for controlling the driver to play at least one playlist from the recording medium, Here, the playlist includes at least one playitem and at least one sub-playitem, wherein the playitem provides navigation information for indicating at least one still picture from a first file to be reproduced, and the still picture And period information for displaying the information, and the sub playitem provides navigation information for reproducing audio data from a second file.