WO2007024078A1 - Recording medium, method and apparatus for reproducing data, and method and apparatus for recording data - Google Patents

Recording medium, method and apparatus for reproducing data, and method and apparatus for recording data Download PDF

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Publication number
WO2007024078A1
WO2007024078A1 PCT/KR2006/003279 KR2006003279W WO2007024078A1 WO 2007024078 A1 WO2007024078 A1 WO 2007024078A1 KR 2006003279 W KR2006003279 W KR 2006003279W WO 2007024078 A1 WO2007024078 A1 WO 2007024078A1
Authority
WO
WIPO (PCT)
Prior art keywords
video stream
secondary video
primary
window
display
Prior art date
Application number
PCT/KR2006/003279
Other languages
French (fr)
Inventor
Kun Suk Kim
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020060030107A external-priority patent/KR20070022578A/en
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Priority to EP06769355A priority Critical patent/EP1938323A4/en
Priority to JP2008527842A priority patent/JP2009505327A/en
Publication of WO2007024078A1 publication Critical patent/WO2007024078A1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/005—Reproducing at a different information rate from the information rate of recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/34—Indicating arrangements 
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/783—Adaptations for reproducing at a rate different from the recording rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal
    • H04N9/8063—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal using time division multiplex of the PCM audio and PCM video signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
    • H04N9/8211—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal the additional signal being a sound signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
    • H04N9/8227—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal the additional signal being at least another television signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/87—Regeneration of colour television signals
    • H04N9/8715—Regeneration of colour television signals involving the mixing of the reproduced video signal with a non-recorded signal, e.g. a text signal

Definitions

  • the present invention relates to recording and reproducing
  • high-density optical recording mediums such as a Blu-ray Disc
  • BD high definition digital versatile disc
  • HD-DVD high definition digital versatile disc
  • Such a high-density optical recording medium which is based
  • the present invention relates to a method of managing
  • management data is read from a recording medium, and a secondary video stream is selectively displayed
  • secondary video stream represents the picture-in-picture
  • the management data includes display
  • secondary video stream is to be displayed, and the secondary video stream is displayed based on the display information.
  • the display information indicates
  • the present invention further relates to an apparatus for
  • a driver is configured to drive a reproducing element for reproducing data from a
  • controller is configured to selectively display a secondary
  • the secondary video stream represents the
  • a decoder in the apparatus is configured to decode
  • the management data includes display information indicating whether to close a window in which the
  • the display information indicates
  • the controller is configured to selectively display the secondary video stream based on the
  • recording medium having a data structure for managing
  • the recording medium includes a data area
  • the data area stores a primary video
  • the primary video stream represents a primary
  • the management area stores management data
  • the management data includes display information
  • the secondary video stream represents the picture-in-picture presentation path.
  • the display information indicates whether to
  • the present invention also relates to a method and apparatus
  • FIG. 1 is a schematic view illustrating an exemplary
  • FIG. 2 is a schematic diagram illustrating a structure of
  • FIG. 3 is a schematic diagram illustrating a data recording
  • FIG. 4 is a schematic diagram for understanding a concept of
  • FIG. 5 is a block diagram illustrating an overall
  • FIG. 6 is a schematic diagram explaining a playback system according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram illustrating an exemplary
  • FIGs. 8A to 8C are schematic diagrams for understanding of
  • FIG. 9 is a block diagram schematically illustrating an AV
  • FIGs. 1OA - 1OC are schematic diagrams for understanding of
  • FIG. 11 is a flow chart illustrating an exemplary embodiment
  • optical disc as an example recording medium.
  • BD Blu-ray disc
  • Storage as generally used in the embodiments is a storage
  • the storage is an element in which the user freely
  • hard disk there are a hard disk, a system memory, a flash memory, and
  • recording medium for example, a BD
  • medium is externally-downloaded data.
  • the recording medium for example, metadata
  • title defined in the present invention means a
  • HDMV High Definition Movie
  • FIG. 1 illustrates an exemplary embodiment of the combined use of an optical recording/reproducing apparatus according
  • optical recording/reproducing apparatus 10 according to the present invention and a peripheral appliance.
  • apparatus 10 may be designed to have recording and
  • BD-player for playback of a BD
  • BD-recorder for playback of a BD
  • apparatus 10 of the present invention may be a drive which can be built in a computer or the like.
  • the optical recording/reproducing apparatus 10 of the present invention not only has a function for recording and playback
  • representative external input signals may be digital
  • multimedia broadcasting-based signals Internet-based signals, etc.
  • Internet-based signals desired
  • CP content provider
  • Content as used in the present invention may be the content
  • a certain title may be recorded in an optical disc as
  • audio stream of the original data may be provided as additional data via the Internet.
  • the audio stream may desire to download the audio stream (for example, Korean
  • Data of any attribute may be used as additional data as long
  • FIG. 2 illustrates a file structure for reproduction
  • the file structure of the present invention includes a root
  • index file "index. bdmv”
  • object file "MovieObject .bdmv”
  • the file structure of the present invention also includes directories having
  • a playlist directory PLAYLIST namely, a playlist directory PLAYLIST, a clip information directory CLIPINF, a stream directory STREAM, an auxiliary playlist directory PLAYLIST, a playlist directory PLAYLIST, a clip information directory CLIPINF, a stream directory STREAM, an auxiliary playlist directory PLAYLIST, a playlist directory PLAYLIST, a clip information directory CLIPINF, a stream directory STREAM, an auxiliary
  • the JAR directory includes JAVA program files.
  • the metadata directory META includes a file of data about
  • Such a metadata file may
  • Such metadata files are used for efficient search and management of data during the recording and reproduction of
  • the BD-J directory BDJO includes a BD-J object file for
  • the auxiliary directory AUXDATA includes an additional data
  • directory AUXDATA may include a "Sound. bdmv" file for
  • the stream directory STREAM includes a plurality of files of
  • AV stream referred to as an "AV stream”.
  • a title is composed of at
  • the clip information (clip-info) directory CLIPINF includes
  • clip That is, a clip is indicative of data including both
  • the playlist directory PLAYLIST includes a plurality of
  • Playlist means a combination of
  • Each playing interval is referred to as a "playitem”.
  • Each playlist file "*.mpls"
  • Each of the playitems and subplayitems includes information as to the reproduction start time IN-Time and
  • a playlist may be a combination of
  • subplayitem is defined as a "sub path".
  • the sub path provides auxiliary presentation associated with
  • Each playlist file should include
  • Each playlist file also includes at least one
  • each playlist file is a basic reproduction/management file unit in the overall reproduction/management file structure for
  • a secondary video through a sub path, is referred to as a secondary video.
  • present invention provide a secondary video reproduction
  • the backup directory BACKUP stores a copy of the files in the
  • the disc for example, a copy of the index file "index. bdmv",
  • the backup directory BACKUP is
  • FIG. 3 illustrates a data recording structure of the optical
  • FIG. 3 recorded structures of information associated with
  • the disc includes a file
  • system information area recorded with system information for
  • JAR area recorded with JAVA program files The areas are arranged in the above-descried order when viewing from the
  • Stream data of a primary video and/or a secondary video is
  • the secondary video may be
  • management area The file system
  • the management area includes
  • the trick playing mode of the primary video is stored in the
  • the flag is included in metadata for managing reproduction of the secondary video.
  • FIG. 3 The areas of FIG. 3 are shown and described only for
  • present invention is not limited to the area arrangement of
  • FIG. 4 is a schematic diagram for understanding of the
  • the present invention provides a method for reproducing
  • the present invention provides an optical image
  • the video of the comments or episode is a
  • the secondary video 420 can be
  • the reproduction of the secondary video 420 may be begun at
  • the secondary videos 420 may also be implemented.
  • the secondary videos 420 may be reproduced
  • the primary video 410 can be reproduced
  • the secondary video 420 can be reproduced
  • the present invention provides for determining how the
  • reproduction speed namely, if the primary video 410 is in a
  • invention provides for defining whether or not the
  • secondary video 420 is output, is maintained in an open state, or should be closed.
  • FIG. 5 illustrates an exemplary embodiment of the overall
  • the optical recording/reproducing circuit As shown in FIG. 5, the optical recording/reproducing circuit
  • apparatus 10 mainly includes a pickup 11, a servo 14, a
  • the management data includes reproduction
  • the servo 14 controls operation
  • the signal processor 13 receives a
  • signal processor 13 also modulates signals to be recorded,
  • microprocessor 16 controls the operations of the pickup 11,
  • the recording/reproducing unit reads data from an
  • optical disc 30 or storage 15 under the control of a
  • controller 12 and sends the read data to an AV decoder 17b.
  • the recording/reproducing unit functions as a reader unit for
  • the recording/reproducing unit also receives an
  • recording/reproducing unit can record video and audio data in
  • the controller 12 downloads additional data present outside
  • the optical disc 30 in accordance with a user command, and stores the additional data in the storage 15.
  • the controller 12 generates information as to
  • the optical recording/reproducing apparatus 10 furthermore controls the optical recording/reproducing apparatus 10
  • the playback system 17 includes an AV
  • decoder 17b for decoding an AV signal.
  • a player model 17a for analyzing an object command or application associated with playback of a
  • the playback system 17 is the player model itself.
  • the AV decoder 17b may include a plurality of decoders
  • the AV encoder 18 which is also included in the optical
  • an MPEG2 transport stream for example, an MPEG2 transport stream, and sends the
  • FIG. 6 is a schematic diagram explaining the playback system
  • the playback system in accordance with the present invention, the playback system
  • Playback system means a collective reproduction processing
  • the playback system is a system which
  • optical recording/reproducing apparatus but also can
  • the playback system 17 may
  • a user event manager 171 includes a user event manager 171, a module manager 172, a
  • a playback control engine 176 a playback control engine 176, a presentation engine 177, and
  • HDMV module 174 and BD-J module 175 has a control function
  • module 174 and BD-J module 175 can separate an associated
  • the HDMV module 174 includes a command processor 174a.
  • VM 175 includes a Java Virtual Machine (VM) 175a, and an
  • the Java VM 175a is a virtual machine in which an application
  • the application manager 175b includes an
  • the module manager 172 functions not only to send user
  • a playback control engine 174 and BD-J module 175.
  • the playback control engine 176 includes playback
  • GPRs purpose registers
  • control functions 176a mean the playback control engine 176 itself.
  • the HDMV module 174 and BD-J module 175 receive user commands
  • HDMV module 174 and BD-J module 175 are independent manners, respectively.
  • the user event manager 171 receives a user command generated
  • the user event manager sends the received user command to the module manager
  • event manager 171 receives a user command generated through a key event, the user event manager sends the received user
  • the playback system 17 of the present invention may also be any one of the playback system 17 of the present invention.
  • the metadata manager 173 includes a metadata manager 173.
  • the metadata manager 173 can perform
  • Meta metadata manager 173 can also provide, to the user, recording
  • the module manager 172 HDMV module 174, BD-J module 175, and
  • reference numerals 172, 174, 175, and 176 each of which performs desired processing using software, may constitute a
  • plane means a conceptual model for explaining
  • secondary video plane is arranged in front of the primary
  • second video plane is also called a "window”.
  • Secondary video window is referred to as a "secondary video window”.
  • FIG. 7 illustrates an exemplary embodiment of the secondary
  • the secondary video is managed using metadata.
  • the metadata includes information about the reproduction time, reproduction size, and reproduction position of the secondary
  • the PiP metadata may be included in a playlist which is a
  • FIG. 7 illustrates PiP metadata blocks included in an ⁇ ExtensionData' block of a
  • Metadata may include at least one block header
  • the block header 910 includes header
  • the block header 910 may include a field indicating playitem
  • the ⁇ PlayItem_id[k] ' is a value corresponding to a playitem including an STN table in
  • the associated block data 920 is applied. That is, it is
  • the optical recording/reproducing apparatus 10 can be any optical recording/reproducing apparatus 10.
  • the playlist block includes a sub path block.
  • FIGs. 8A to 8C are schematic diagrams for understanding of
  • the secondary video is
  • ⁇ out-of-mux' type is referred to as an ⁇ out-of-mux' type.
  • the main path is configured by four
  • the sub path is configured by a plurality of subplayitems .
  • the sub path is synchronous with the main path.
  • the secondary path is configured by a plurality of subplayitems .
  • video through one sub path is begun at a time during the reproduction of the primary video.
  • Each of the playitems and subplayitems includes
  • FIG. 9A schematically illustrating an AV decoder
  • the AV stream which is reproduced through a main transport stream (TS) .
  • TS transport stream
  • main transport stream (hereinafter,
  • main stream referred to as a "main stream"
  • AV stream an AV stream other than
  • the main stream is referred to as a sub transport stream
  • main stream is depacketized by a source depacketizer 710a.
  • Data contained in the depacketized AV stream is supplied to an associated one of decoders 730a to 73Og after being
  • PID packet identifier
  • the packets from the PID filter-1 720a may pass through another switching element before
  • the buffered sub stream is depacketized by a
  • AV stream is supplied to an associated one of the decoders
  • the packets from the PID filter-2 720b may pass through another switching element before receipt by the decoders 730b-730f.
  • the primary video is decoded in a primary video
  • a PG decoder 730c decoded in a PG decoder 730c, an IG decoder 73Od, a secondary audio decoder 73Of, and a text decoder 73Og, respectively.
  • the decoded primary video, secondary video, PG, and IG are reproduced by a primary video plane 740a, a secondary video
  • presentation graphics plane 740c can also reproduce graphic data decoded in the text decoder 73Og.
  • the controller 12 performs a control operation
  • the controller 12 determines from a trick playing flag
  • the content provider may set the trick playing flag to a value of, for example, ⁇ 0 b ' . If
  • the trick playing flag is set to a value of, for example, ⁇ 0 b ',
  • the optical recording/reproducing apparatus 10 closes the
  • the optical recording/reproducing apparatus 10 may
  • the optical recording/reproducing apparatus 10 can be any optical recording/reproducing apparatus 10.
  • playing flag has a value of ⁇ lb' .
  • the secondary video is displayed synchronously with the trick playing of the primary video. For example, in case
  • the secondary video is also forwardly reproduced at
  • the secondary video is also
  • controller 12 prohibits the secondary video plane 740b from
  • the secondary video may be displayed. In this manner, the secondary video may be displayed.
  • the trick playing flag may be included in PiP metadata.
  • the content provider may provide a trick
  • the secondary video is
  • the sub path can begin at any time on the timeline of the
  • sub path presentation is then synchronized with the main path.
  • secondary videos includes one main path used to reproduce the primary video, and one sub path used to reproduce the
  • the main path is configured by three
  • the secondary video which is reproduced through the sub path, is asynchronous with the
  • FIG. 8B Accordingly, the optical recording/reproducing
  • apparatus 10 can operate irrespective of the above-described
  • the user can view the secondary video at any time
  • reproduction of the secondary video can be started at any time, irrespective of the the primary video, because it is
  • the secondary video is
  • the trick playing flag according to the present invention is set to a value indicating to close
  • the secondary video may continue to be decoded, but
  • the secondary video is
  • the secondary video is multiplexed in a stream different from
  • ⁇ in-mux' type is referred to as an ⁇ in-mux' type.
  • the playlist for managing the primary and secondary videos includes one main path and one sub path.
  • the main path is configured by four playitems ( ⁇ PlayItem_id'
  • configuring the sub path includes information for identifying
  • time stamp information indicating a presentation time of the
  • each subplayitem is synchronized with the associated playitem, using the above-described
  • the secondary video is synchronized with the primary video.
  • the secondary video is provided to the AV
  • decoder 17b along with the primary video, as a main stream.
  • the main stream which is packetized data
  • the primary video is output from the primary video decoder 730a after being decoded in the primary
  • the secondary video is output from the
  • the secondary video may continue to be decoded,, but not displayed, as discussed above.
  • the main stream and sub stream may be provided from the
  • the primary video may be any different clips, respectively.
  • the secondary video may be downloaded from the
  • the block header 910 may also include
  • the type of the secondary video provided to the user is varied depending on the PiP timeline
  • FIGs. 1OA to 1OC are schematic diagrams for understanding of
  • the block data 920 may include time stamp information
  • PiP metadata referred to by PiP metadata.
  • the sub path used to reproduce the secondary video is synchronous with the main
  • the block data 920 includes at least one block of secondary
  • the i-th ⁇ pip_composition_metadata' is secondary video
  • composition information which is valid between
  • the secondary video composition information is information
  • the secondary video composition information includes
  • the secondary video may include position information of the secondary video, and size information of the secondary video (hereinafter,
  • the secondary video includes horizontal position information
  • ⁇ pip_horizontal_position' indicates a horizontal position of
  • ⁇ pip_vertical_position' indicates a vertical position of the
  • apparatus 10 closes the secondary video window, to which the
  • secondary video is output, or maintains the secondary video
  • the secondary video refers to the timeline of the main path because the secondary video
  • ⁇ pip_composition_metadata [i] ' corresponding to ⁇ pip__metadata_time_stamp [i] ' is applied to the secondary
  • the secondary video is displayed on the
  • FIG. 1OB illustrates the case in which the PiP presentation
  • the sub path is referred to by the entries of ⁇ pip_metadata_time_stamp' .
  • ⁇ pip_metadata_time_stamp' the entries of ⁇ pip_metadata_time_stamp' .
  • the PiP presentation path is asynchronous with the main path.
  • ⁇ pip_metadata_time_stamp [0] ' may be put at the beginning
  • the secondary video is
  • the secondary video is reproduced irrespective of
  • the change For example, the presentation position and scale
  • FIG. 1OC illustrates the case in which the PiP presentation
  • PiP metadata is referred to by the entries of
  • FIG. 1OA the timeline of the playitem is referred to in the
  • ⁇ pip_metadata_time_stamp' indicates a presentation time in
  • the secondary video can be any type of FIG. 1OC.
  • the secondary video can be any type of FIG. 1OC.
  • reproduce the secondary video is asynchronous with the main
  • FIG. 8B because the PiP presentation path is asynchronous
  • block data 920 is valid until the presentation end time of
  • the present invention relates to a data reproducing method
  • the data is provided via a recording medium or a
  • the present invention checks the trick playing flag stored in
  • the optical recording/reproducing apparatus 10 closes the secondary video window in a trick playing mode of the
  • playing flag is set to a value (for example, ⁇ lb') other than
  • the secondary video can be asynchronous with the primary video
  • the trick playing flag may be valid in the
  • FIG. 11 is a flow chart illustrating a data reproducing
  • the recording medium and/or storage (SIlO) the recording medium and/or storage (SIlO) , the primary video
  • the controller 12 checks the trick playing flag for the
  • the trick playing flag is set to a close value, the secondary video window is closed assuming the trick playing of the
  • the secondary video window is not opened even if the display time point for beginning display of the secondary
  • the secondary video window may be closed (S140) , or may be
  • the secondary video can be any sub path type where the secondary video is asynchronous with the primary video.
  • the controller 12 may not change a state of the
  • controller 12 may not close the secondary video window.
  • controller 12 may close the secondary video
  • the secondary video is reproduced synchronously with
  • the secondary video is synchronous with the primary video

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)

Abstract

In one embodiment, management data is read from a recording medium, and a secondary video stream is selectively displayed with a primary video stream based on the management data. The secondary video stream represents the picture-in-picture presentation path with respect to a primary presentation path represented by the primary video stream. Even if the secondary video stream is not displayed, the secondary video stream is decoded.

Description

[DESCRIPTION]
RECORDING MEDIUM, METHOD AND APPARATUS FOR REPRODUCING DATA,
AND METHOD AND APPARATUS FOR RECORDING DATA
Technical Field
The present invention relates to recording and reproducing
methods and apparatuses, and a recording medium.
Background Art Optical discs are widely used as a recording medium capable
of recording a large amount of data therein. Particularly, high-density optical recording mediums such as a Blu-ray Disc
(BD) and a high definition digital versatile disc (HD-DVD) have recently been developed, and are capable of recording
and storing large amounts of high-quality video data and
high-quality audio data.
Such a high-density optical recording medium, which is based
on next-generation recording medium techniques, is considered
to be a next-generation optical recording solution capable of
storing much more data than conventional DVDs. Development
of high-density optical recording mediums is being conducted,
together with other digital appliances. Also, an optical
recording/reproducing apparatus, to which the standard for
high density recording mediums is applied, is under
development. In accordance with the development of high-density recording
mediums and optical recording/reproducing apparatuses, it is
possible to simultaneously reproduce a plurality of videos.
However, there is known no method capable of effectively
simultaneously recording or reproducing a plurality of videos.
Furthermore, it is difficult to develop a complete optical
recording/reproducing apparatus based on high-density
recording mediums because there is no completely-established
standard for high-density recording mediums.
Disclosure of Invention
The present invention relates to a method of managing
reproduction of at least one picture-in-picture presentation path.
In one embodiment, management data is read from a recording medium, and a secondary video stream is selectively displayed
with a primary video stream based on the management data. The
secondary video stream represents the picture-in-picture
presentation path with respect to a primary presentation path
represented by the primary video stream. Even if the
secondary video stream is not displayed, the secondary video
stream is decoded.
In one embodiment, the management data includes display
information indicating whether to close a window in which the
secondary video stream is to be displayed, and the secondary video stream is displayed based on the display information.
In another embodiment, the display information indicates
whether to close the window in which the secondary video
stream is to be displayed during trick play of the primary
video stream.
In a further embodiment, the selective display of the
secondary video stream based on the display information only
takes place if the secondary video stream is being reproduced
synchronously with the primary video stream.
The present invention further relates to an apparatus for
managing reproduction of at least one picture-in-picture
presentation path.
In one embodiment of the apparatus, a driver is configured to drive a reproducing element for reproducing data from a
recording medium, and a controller configured to control the
driver to read management data from the recording medium. The
controller is configured to selectively display a secondary
video stream with a primary video stream based on the
management data. The secondary video stream represents the
picture-in-picture presentation path with respect to a
primary presentation path represented by the primary video
stream. A decoder in the apparatus is configured to decode
the secondary video stream even if the controller does not
display the secondary video stream.
In one embodiment, the management data includes display information indicating whether to close a window in which the
secondary video stream is to be displayed, and the controller
is configured to selectively display the secondary video
stream based on the display information.
In another embodiment, the display information indicates
whether to close the window in which the secondary video
stream is to be displayed during trick play of the primary
video stream.
In yet another embodiment, the controller is configured to selectively display the secondary video stream based on the
display information only if the secondary video stream is
being reproduced synchronously with the primary video stream.
A further embodiment of the present invention relates to a
recording medium having a data structure for managing
reproduction of at least one picture-in-picture presentation path.
In one embodiment, the recording medium includes a data area
and a management area. The data area stores a primary video
stream. The primary video stream represents a primary
presentation path. The management area stores management data
for managing reproduction of a picture-in-picture
presentation path with respect to the primary presentation
path. The management data includes display information
indicating whether to close a window in which a secondary
video stream is to be displayed, and the secondary video stream represents the picture-in-picture presentation path.
For example, the display information indicates whether to
close the window in which the secondary video stream is to be
displayed during trick play of the primary video stream.
The present invention also relates to a method and apparatus
for recording the data structure for managing reproduction of
at least one picture-in-picture presentation path on a recording medium.
Brief Description of Drawings
The accompanying drawings, which are included to provide a
further understanding of the invention and are incorporated
in and constitute a part of this application, illustrate
embodiment (s ) of the invention and together with the
description serve to explain the principles of the invention. In the drawings :
FIG. 1 is a schematic view illustrating an exemplary
embodiment of the combined use of an optical
recording/reproducing apparatus according to an embodiment of
the present invention and a peripheral appliance;
FIG. 2 is a schematic diagram illustrating a structure of
files recorded in an optical disc as a recording medium
according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a data recording
structure of the optical disc as the recording medium according to an embodiment of the present invention;
FIG. 4 is a schematic diagram for understanding a concept of
a secondary video according to an embodiment of the present
invention;
FIG. 5 is a block diagram illustrating an overall
configuration of an optical recording/reproducing apparatus
according to an embodiment of the present invention;
FIG. 6 is a schematic diagram explaining a playback system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating an exemplary
embodiment of secondary video metadata according to the present invention;
FIGs. 8A to 8C are schematic diagrams for understanding of
the secondary video sub path types according to embodiments
of the present invention, respectively;
FIG. 9 is a block diagram schematically illustrating an AV
decoder model according to an embodiment of the present
invention;
FIGs. 1OA - 1OC are schematic diagrams for understanding of
secondary video timeline types according to embodiments of
the present invention; and
FIG. 11 is a flow chart illustrating an exemplary embodiment
of a data reproducing method according to the present
invention. Best Mode for Carrying Out the Invention
Reference will now be made in detail to example embodiments
of the present invention, which are illustrated in the
accompanying drawings. Wherever possible, the same reference
numbers will be used throughout the drawings to refer to the
same or like parts.
In the following description, example embodiments of the
present invention will be described in conjunction with an
optical disc as an example recording medium. In particular, a Blu-ray disc (BD) is used as an example recording medium,
for the convenience of description. However, it will be
appreciated that the technical idea of the present invention
is applicable to other recording mediums, for example, HD-DVD, equivalently to the BD.
"Storage" as generally used in the embodiments is a storage
equipped in a optical recording/reproducing apparatus (FIG.
1) . The storage is an element in which the user freely
stores required information and data, to subsequently use the
information and data. For storages, which are generally used,
there are a hard disk, a system memory, a flash memory, and
the like. However, the present invention is not limited to
such storages.
In association with the present invention, the "storage" is
also usable as means for storing data associated with a
recording medium (for example, a BD) . Generally, the data stored in the storage in association with the recording
medium is externally-downloaded data.
As for such data, it will be appreciated that partially- allowed data directly read out from the recording medium, or
system data produced in association with recording and
production of the recording medium (for example, metadata)
can be stored in the storage.
For the convenience of description, in the following
description, the data recorded in the recording medium will be referred to as "original data", whereas the data stored in
the storage in association with the recording medium will be
referred to as "additional data".
Also, "title" defined in the present invention means a
reproduction unit interfaced with the user. Titles are
linked with particular objects, respectively. Accordingly, streams recorded in a disc in association with a title are
reproduced in accordance with a command or program in an
object linked with the title. In particular, for the
convenience of description, in the following description,
among the titles including video data according to an MPEG
compression scheme, titles supporting features such as
seamless multi-angle and multi story, language credits,
director's cuts, trilogy collections, etc. will be referred
to as "High Definition Movie (HDMV) titles". Also, among the
titles including video data according to an MPEG compression scheme, titles providing a fully programmable application
environment with network connectivity thereby enabling the
content provider to create high interactivity will be
referred to as "BD-J titles".
FIG. 1 illustrates an exemplary embodiment of the combined use of an optical recording/reproducing apparatus according
to the present invention and a peripheral appliance. The optical recording/reproducing apparatus 10 according to
an embodiment of the present invention can record or
reproduce data in/from various optical discs having different
formats. If necessary, the optical recording/reproducing
apparatus 10 may be designed to have recording and
reproducing functions only for optical discs of a particular
format (for example, BD) , or to have a reproducing function
alone, except for a recording function. In the following
description, however, the optical recording/reproducing
apparatus 10 will be described in conjunction with, for
example, a BD-player for playback of a BD, or a BD-recorder
for recording and playback of a BD, taking into
consideration the compatibility of BDs with peripheral
appliances, which must be solved in the present invention.
It will be appreciated that the optical recording/reproducing
apparatus 10 of the present invention may be a drive which can be built in a computer or the like.
The optical recording/reproducing apparatus 10 of the present invention not only has a function for recording and playback
of an optical disc 30, but also has a function for receiving
an external input signal, processing the received signal, and
sending the processed signal to the user in the form of a
visible image through an external display 20. Although there is no particular limitation on external input signals,
representative external input signals may be digital
multimedia broadcasting-based signals, Internet-based signals, etc. Specifically, as to Internet-based signals, desired
data on the Internet can be used after being downloaded
through the optical recording/reproducing apparatus 10
because the Internet is a medium easily accessible by any
person.
In the following description, persons who provide contents as
external sources will be collectively- referred to as a "content provider (CP)".
"Content" as used in the present invention may be the content
of a title, and in this case means data provided by the
author of the associated recording medium.
Hereinafter, original data and additional data will be
described in detail. For example, a multiplexed AV stream of
a certain title may be recorded in an optical disc as
original data of the optical disc. In this case, an audio
stream (for example, Korean audio stream) different from the
audio stream of the original data (for example, English) may be provided as additional data via the Internet. Some users
may desire to download the audio stream (for example, Korean
audio stream) corresponding to the additional data from the
Internet, to reproduce the downloaded audio stream along with
the AV stream corresponding to the original data, or to
reproduce the additional data alone. To this end, it is
desirable to provide a systematic method capable of
determining the relation between the original data and the additional data, and performing management/reproduction of
the original data and additional data, based on the results
of the determination, at the request of the user.
As described above, for the convenience of description,
signals recorded in a disc have been referred to as "original
data", and signals present outside the disc have been
referred to as "additional data". However, the definition of
the original data and additional data is only to classify
data usable in the present invention in accordance with data
acquisition methods. Accordingly, the original data and
additional data should not be limited to particular data.
Data of any attribute may be used as additional data as long
as the data is present outside an optical disc recorded with
original data, and has a relation with the original data.
In order to accomplish the request of the user, the original
data and additional data must have file structures having a
relation therebetween, respectively. Hereinafter, file structures and data recording structures usable in a BD will
be described with reference to FIGs. 2 and 3.
FIG. 2 illustrates a file structure for reproduction and
management of original data recorded in a BD in accordance
with an embodiment of the present invention.
The file structure of the present invention includes a root
directory, and at least one BDMV directory BDMV present under
the root directory. In the BDMV directory BDMV, there are an
index file "index. bdmv" and an object file "MovieObject .bdmv"
as general files (upper files) having information for
securing an interactivity with the user. The file structure of the present invention also includes directories having
information as to the data actually recorded in the disc, and information as to a method for reproducing the recorded data,
namely, a playlist directory PLAYLIST, a clip information directory CLIPINF, a stream directory STREAM, an auxiliary
directory AUXDATA, a BD-J directory BDJO, a metadata
directory META, a backup directory BACKUP, and a JAR
directory. Hereinafter, the above-described directories and
files included in the directories will be described in detail.
The JAR directory includes JAVA program files.
The metadata directory META includes a file of data about
data, namely, a metadata file. Such a metadata file may
include a search file and a metadata file for a disc library.
Such metadata files are used for efficient search and management of data during the recording and reproduction of
data .
The BD-J directory BDJO includes a BD-J object file for
reproduction of a BD-J title.
The auxiliary directory AUXDATA includes an additional data
file for playback of the disc. For example, the auxiliary
directory AUXDATA may include a "Sound. bdmv" file for
providing sound data when an interactive graphics function is
executed, and "11111. otf" and " 99999. otf" files for providing font information during the playback of the disc.
The stream directory STREAM includes a plurality of files of
AV streams recorded in the disc according to a particular
format. Most generally, such streams are recorded in the
form of MPEG-2-based transport packets. The stream directory
STREAM uses "*.m2ts" as an extension name of stream files
(for example, 01000.m2ts, 02000.m2ts, ...) • Particularly, a multiplexed stream of video/audio/graphic information is
referred to as an "AV stream". A title is composed of at
least one AV stream file.
The clip information (clip-info) directory CLIPINF includes
clip-info files 01000. clpi, 02000. clpi, ... respectively
corresponding to the stream files "*.m2ts" included in the
stream directory STREAM. Particularly, the clip-info files
"*.clpi" are recorded with attribute information and timing
information of the stream files "*.m2ts". Each clip-info file "*.clpi" and the stream file "*.m2ts" corresponding to
the clip-info file "*.clpi" are collectively referred to as a
"clip". That is, a clip is indicative of data including both
one stream file "*.m2ts" and one clip-info file "*.clpi"
corresponding to the stream file "*.m2ts".
The playlist directory PLAYLIST includes a plurality of
playlist files "*.mpls". "Playlist" means a combination of
playing intervals of clips. Each playing interval is referred to as a "playitem". Each playlist file "*.mpls"
includes at least one playitem, and may include at least one
subplayitem. Each of the playitems and subplayitems includes information as to the reproduction start time IN-Time and
reproduction end time OUT-Time of a particular clip to be
reproduced. Accordingly, a playlist may be a combination of
playitems.
As to the playlist files, a process for reproducing data
using at least one playitem in a playlist file is defined as
a "main path", and a process for reproducing data using one
subplayitem is defined as a "sub path". The main path
provides master presentation of the associated playlist, and
the sub path provides auxiliary presentation associated with
the master presentation. Each playlist file should include
one main path. Each playlist file also includes at least one
sub path, the number of which is determined depending on the
presence or absence of subplayitems. Thus, each playlist file is a basic reproduction/management file unit in the overall reproduction/management file structure for
reproduction of a desired clip or clips based on a
combination of one or more playitems.
In association with the present invention, video data, which
is reproduced through a main path, is referred to as a
primary video, whereas video data, which is reproduced
through a sub path, is referred to as a secondary video. The
function of the optical recording/reproducing apparatus for
simultaneously reproducing primary and secondary videos is
also referred to as a "picture-in-picture (PiP)". In association with this, how the secondary video should be
processed if the primary video is forwardly or backwardly reproduced at a reproduction speed other than a normal
reproduction speed, namely, in a trick playing mode of the
primary video, will be addressed below. Embodiments of the
present invention provide a secondary video reproduction
method efficiently usable in the trick playing mode of the
primary video. This will be described in detail with
reference to FIG. 7 and the following drawings.
The backup directory BACKUP stores a copy of the files in the
above-described file structure, in particular, copies of
files recorded with information associated with playback of
the disc, for example, a copy of the index file "index. bdmv",
object files "MovieObject .bdmv" and "BD-JObject .bdmv", unit key files, all playlist files xx*.mpls" in the playlist
directory PLAYLIST, and all clip-info files λλ*.clpi" in the
clip-info directory CLIPINF. The backup directory BACKUP is
adapted to separately store a copy of files for backup
purposes, taking into consideration the fact that, when any
of the above-described files is damaged or lost, fatal errors
may be generated in association with playback of the disc. Meanwhile, it will be appreciated that the file structure of
the present invention is not limited to the above-described
names and locations. That is, the above-described
directories and files should not be understood through the
names and locations thereof, but should be understood through the meaning thereof.
FIG. 3 illustrates a data recording structure of the optical
disc according to an embodiment of the present invention. In
FIG. 3, recorded structures of information associated with
the file structures in the disc are illustrated. Referring
to FIG. 3, it can be seen that the disc includes a file
system information area recorded with system information for
managing the overall file, an area recorded with the index
file, object file, playlist files, clip-info files, and meta
files (which are required for reproduction of recorded
streams λN*.m2ts"), a stream area recorded with streams each
composed of audio/video/graphic data or STREAM files, and a
JAR area recorded with JAVA program files. The areas are arranged in the above-descried order when viewing from the
inner periphery of the disc.
Stream data of a primary video and/or a secondary video is
stored in the stream area. The secondary video may be
multiplexed in the same stream as the primary video, or may
be multiplexed in a stream different from that of the primary
video.
In the disc, there is an area for recording file information
for reproduction of contents in the stream area. This area
is referred to as a "management area". The file system
information area and database area are included in the management area. In accordance with the present invention, a
sub path is used to reproduce the secondary video. The type
of the sub path may be classified into three types in
accordance with the kind of stream in which the secondary video is multiplexed, and whether or not the sub path is
synchronous with a main path. The three sub path types will
be described with reference to FIGs. 8A to 8C. Since the
method for reproducing the secondary video is varied
depending on the sub path type, the management area includes
information indicating the sub path type. Meanwhile, in
accordance with an embodiment of the present invention, a
flag associated with reproduction of the secondary video in
the trick playing mode of the primary video is stored in the
management area. The flag is included in metadata for managing reproduction of the secondary video.
The areas of FIG. 3 are shown and described only for
illustrative purposes. It will be appreciated that the
present invention is not limited to the area arrangement of
FIG. 3.
FIG. 4 is a schematic diagram for understanding of the
concept of the secondary video according to embodiments of
the present invention. The present invention provides a method for reproducing
secondary video data, simultaneously with primary video data.
For example, the present invention provides an optical
recording/reproducing apparatus that enables a PiP
application, and, in particular, effectively performs the PiP application.
During reproduction of a primary video 410 as shown in FIG. 4,
it may be necessary to output other video data associated
with the primary video 410 through the same display 20 as
that of the primary video 410. In accordance with the
present invention, such a PiP application can be achieved.
For example, during playback of a movie or documentary, it is
possible to provide, to the user, the comments of the
director or episode associated with the shooting procedure.
In this case, the video of the comments or episode is a
secondary video 420. The secondary video 420 can be
reproduced with the primary video 410, from the beginning of the reproduction of the primary video 410.
The reproduction of the secondary video 420 may be begun at
an intermediate time of the reproduction of the primary video
410. It is also possible to display the secondary video 420
while varying the position or size of the secondary video 420
on the screen, depending on the reproduction procedure. A
plurality of secondary videos 420 may also be implemented. In this case, the secondary videos 420 may be reproduced,
separately from one another, during the reproduction of the
primary video 410. The primary video 410 can be reproduced
along with an audio 410a associated with the primary video 410. Similarly, the secondary video 420 can be reproduced
along with an audio 420a associated with the secondary video
420.
In connection with this, as described below, an embodiment of
the present invention provides for determining how the
secondary video 420 should be processed if the primary video
410 is reproduced at a reproduction speed other than a normal
reproduction speed, namely, if the primary video 410 is in a
trick playing mode. That is, an embodiment of the present
invention provides for defining whether or not the
reproduction of the secondary video 420 is continued through
the sub path, irrespective of the trick playing of the
primary video 410, namely, whether the window, to which the
secondary video 420 is output, is maintained in an open state, or should be closed.
FIG. 5 illustrates an exemplary embodiment of the overall
configuration of the optical recording/reproducing apparatus
10 according to the present invention.
As shown in FIG. 5, the optical recording/reproducing
apparatus 10 mainly includes a pickup 11, a servo 14, a
signal processor 13, and a microprocessor 16. The pickup 11
reproduces original data and management data recorded in an optical disc. The management data includes reproduction
management file information. The servo 14 controls operation
of the pickup 11. The signal processor 13 receives a
reproduced signal from the pickup 11, and restores the
received reproduced signal to a desired signal value. The
signal processor 13 also modulates signals to be recorded,
for example, primary and secondary videos, to signals recordable in the optical disc, respectively. The
microprocessor 16 controls the operations of the pickup 11,
the servo 14, and the signal processor 13. The pickup 11,
the servo 14, the signal processor 13, and the microprocessor
16 are also collectively referred to as a
"recording/reproducing unit". In accordance with the present
invention, the recording/reproducing unit reads data from an
optical disc 30 or storage 15 under the control of a
controller 12, and sends the read data to an AV decoder 17b.
That is, in a viewpoint of reproduction, the recording/reproducing unit functions as a reader unit for
reading data. The recording/reproducing unit also receives an
encoded signal from an AV encoder 18, and records the
received signal in the optical disc 30. Thus, the
recording/reproducing unit can record video and audio data in
the optical disc 30.
The controller 12 downloads additional data present outside
the optical disc 30 in accordance with a user command, and stores the additional data in the storage 15. The controller
12 also reproduces the additional data stored in the storage
15 and/or the original data in the optical disc 30 at the request of the user. In accordance with the present
invention, the controller 12 generates information as to
trick playing of the secondary video, and performs a control
operation for recording the information in the optical disc 30, along with video data. The information may be recorded
in the optical disc 30, and more particularly, may be
included an metadata for managing reproduction of the
secondary video.
The optical recording/reproducing apparatus 10 further
includes a playback system 17 for decoding data, and
providing the decoded data to the user under the control of
the controller 12. The playback system 17 includes an AV
decoder 17b for decoding an AV signal. The playback system 17
also includes a player model 17a for analyzing an object command or application associated with playback of a
particular title, and a user command input via the controller
12, and determining a playback direction, based on the
results of the analysis. In an embodiment, the player model
17a may be implemented as including the AV decoder 17b. In this case, the playback system 17 is the player model itself.
The AV decoder 17b may include a plurality of decoders
respectively associated with different kinds of signals. The AV encoder 18, which is also included in the optical
recording/reproducing apparatus 10 of the present invention,
converts an input signal to a signal of a particular format,
for example, an MPEG2 transport stream, and sends the
converted signal to the signal processor 13, to enable
recording of the input signal in the optical disc 30.
FIG. 6 is a schematic diagram explaining the playback system
according to an embodiment of the present invention. In
accordance with the present invention, the playback system
can simultaneously reproduce the primary and secondary videos.
"Playback system" means a collective reproduction processing
means which is configured by programs (software) and/or
hardware provided in the optical recording/reproducing
apparatus. That is, the playback system is a system which
can not only play back a recording medium loaded in the
optical recording/reproducing apparatus, but also can
reproduce and manage data stored in the storage of the apparatus in association with the recording medium (for
example, after being downloaded from the outside of the
recording medium) .
In particular, as shown in Fig. 6, the playback system 17 may
include a user event manager 171, a module manager 172, a
metadata manager 173, an HDMV module 174, a BD-J module 175,
a playback control engine 176, a presentation engine 177, and
a virtual file system 40. This configuration will be described in detail, hereinafter.
As a separate reproduction processing/managing means for
reproduction of HDMV titles and BD-J titles, the HDMV module
174 for HDMV titles and the BD-J module 175 for BD-J titles
are constructed independently of each other. Each of the
HDMV module 174 and BD-J module 175 has a control function
for receiving a command or program contained in the
associated object "Movie Object" or "BD-J Object", and
processing the received command or program. Each of the HDMV
module 174 and BD-J module 175 can separate an associated
command or application from the hardware configuration of the
playback system, to enable portability of the command or
application. For reception and processing of the command,
the HDMV module 174 includes a command processor 174a. For
reception and processing of the application, the BD-J module
175 includes a Java Virtual Machine (VM) 175a, and an
application manager 175b. The Java VM 175a is a virtual machine in which an application
is executed. The application manager 175b includes an
application management function for managing the life cycle
of an application processed in the BD-J module 175.
The module manager 172 functions not only to send user
commands to the HDMV module 174 and BD-J module 175,
respectively, but also to control operations of the HDMV
module 174 and BD-J module 175. A playback control engine
176 analyzes the playlist file actually recorded in the disc in accordance with a playback command from the HDMV module
174 or BD-J module 175, and performs a playback function
based on the results of the analysis. The presentation
engine 177 decodes a particular stream managed in association
with reproduction thereof by the playback control engine 176,
and displays the decoded stream in a displayed picture. In
particular, the playback control engine 176 includes playback
control functions 176a for managing all playback operations,
and player registers 176b for storing information as to the
playback status and playback environment of the player
(information of player status registers (PSRs) and general
purpose registers (GPRs) ) . In some cases, the playback
control functions 176a mean the playback control engine 176 itself.
The HDMV module 174 and BD-J module 175 receive user commands
in independent manners, respectively. The user command processing methods of HDMV module 174 and BD-J module 175 are
also independent of each other. In order to transfer a user
command to an associated one of the HDMV module 174 and BD-J
module 175, a separate transfer means should be used. In
accordance with the present invention, this function is
carried out by the user event manager 171. Accordingly, when
the user event manager 171 receives a user command generated
through a user operation (UO) controller Ilia, the user event manager sends the received user command to the module manager
172 or UO controller 171a. On the other hand, when the user
event manager 171 receives a user command generated through a key event, the user event manager sends the received user
command to the Java VM 175a in the BD-J module 175.
The playback system 17 of the present invention may also
include a metadata manager 173. The metadata manager 173
provides, to the user, a disc library and an enhanced search
metadata application. The metadata manager 173 can perform
selection of a title under the control of the user. The
metadata manager 173 can also provide, to the user, recording
medium and title metadata.
The module manager 172, HDMV module 174, BD-J module 175, and
playback control engine 176 of the playback system according
to the present invention can perform desired processing in a
software manner. Practically, the processing using software
is advantageous in terms of design, as compared to processing using a hardware configuration. Of course, it is general
that the presentation engine 177, decoder 19, and planes are
designed using hardware. In particular, the constituent
elements (for example, constituent elements designated by
reference numerals 172, 174, 175, and 176), each of which performs desired processing using software, may constitute a
part of the controller 12. Therefore, it should be noted
that the above-described constituents and configuration of the present invention be understood on the basis of their
meanings, and are not limited to their implementation methods
such as hardware or software implementation.
Here, "plane" means a conceptual model for explaining
overlaying procedures of the primary video, secondary video,
PG (presentation graphics) , IG (interactive graphics) , text
sub titles. In accordance with the present invention, the
secondary video plane is arranged in front of the primary
video plane. Accordingly, the secondary video output after
being decoded is presented on the secondary video plane. The
second video plane is also called a "window". Hereinafter,
the second video plane, to which the second video is output,
is referred to as a "secondary video window".
FIG. 7 illustrates an exemplary embodiment of the secondary
video metadata according to the present invention.
In accordance with the present invention, reproduction of the
secondary video is managed using metadata. The metadata includes information about the reproduction time, reproduction size, and reproduction position of the secondary
video. Hereinafter, the management data will be described in
conjunction with an example in which the management data is
PiP metadata.
The PiP metadata may be included in a playlist which is a
kind of a reproduction management file. FIG. 7 illustrates PiP metadata blocks included in an λExtensionData' block of a
playlist managing reproduction of the primary video. The PiP
metadata may include at least one block header
Λblock_header[k] ' 910 and block data Λblock_data [k] 920. The number of the block header and block data is determined
depending on the number of metadata block entries stored in
PiP metadata. The block header 910 includes header
information of the associated metadata block. The block data
920 includes data information of the associated metadata
block. Although PiP metadata is described as being included
in the playlist, in the embodiment of FIG. 7, it may be
included in the headers of secondary video streams
implementing PiP.
The block header 910 may include a field indicating playitem
identifying information (hereinafter, referred to as
ΛPlayItem_id[k] ' ) , and a field indicating secondary video
stream identifying information (hereinafter, referred to as
Λsecondary_video_stream_id[k] ' ) . The ΛPlayItem_id[k] ' is a value corresponding to a playitem including an STN table in
which Λsecondary_video_stream_id' entry referred to by
Λsecondary_video_stream_id[k] ' is listed. The ΛPlayItem_id'
value is given in the playlist block of the playlist file.
In the PiP metadata, the entries of λPlayItem__id' in the PiP
metadata are sorted in an ascending order of the λPlayItem_id' . The Λsecondary_video_stream_id [k] ' is used to
identify a sub path, and a secondary video stream to which
the associated block data 920 is applied. That is, it is
possible to identify the stream entry corresponding to
Λsecondary_video_stream_id [k] ' , in the STN table of
λPlayItem' corresponding to ΛPlayItem_id [k] ' . Since the
stream entry is recorded with the value of the sub path identification information associated with the secondary
video, the optical recording/reproducing apparatus 10 can
identify the sub path, which is used to reproduce the
secondary video, based on the recorded value. The playlist block includes a sub path block.
In accordance with an embodiment of the present invention, it
is defined how the reproduction of the secondary video is
carried out in a trick playing mode of the primary video.
Meanwhile, the reproduction of the secondary video is varied
depending on the type of the sub path used to reproduce the
secondary video, and the type of timeline referred to by PiP
metadata for managing the reproduction of the secondary video. This will be described in more detail after first describing
the different sub path types.
FIGs. 8A to 8C are schematic diagrams for understanding of
the sub path types according to the present invention. PiP
application models according to embodiments of the present
invention are mainly classified into three types based on the
kind of a stream in which the secondary video is multiplexed,
and whether or not the sub path used to reproduce the
secondary video is synchronous with a main path associated with the sub path. Accordingly, the kind of the sub path
used to reproduce the secondary video, namely, the sub path
type, is determined, taking into consideration the above-
described three models. In a sub path type shown in FIG. 8A, the secondary video is
encoded in a stream different from that of the primary video,
and the sub path is synchronous with the main path. The case
in which the secondary video is multiplexed in a stream
different from that of the primary video, as described above,
is referred to as an Λout-of-mux' type.
Referring to FIG. 8A, the playlist for managing the primary
and secondary videos includes one main path used to reproduce
the primary video, and one sub path used to reproduce the
secondary video. The main path is configured by four
playitems ( λPlayItem_id' = 0, 1, 2, 3), whereas the sub path
is configured by a plurality of subplayitems . The sub path is synchronous with the main path. In detail, the secondary
video is synchronized with the main path, using an
information field Λsync-Playltem_id' , which identifies a
playitem associated with each sufaplayitem, and presentation
time stamp information Λsync_start_PTS_of_PlayItem' , which
indicates a presentation time of the subplayitem in the
playitem. That is, when the presentation point of the playitem reaches a value referred to by the presentation time stamp information, the presentation of the associated
subplayitem is begun. Thus, reproduction of the secondary
video through one sub path is begun at a time during the reproduction of the primary video.
In this case, the playitem and subplayitem refer to different
clips, respectively, because the secondary video is
multiplexed in a stream different from that of the primary video. Each of the playitems and subplayitems includes
information as to the reproduction start time IN-Time and
reproduction end time OUT-Time of a particular clip to be
reproduced. Accordingly, the clip referred to by the
associated playitem and subplayitem is supplied to the AV
decoder 17b.
Referring to FIG. 9A schematically illustrating an AV decoder
model according to the present invention, the stream file of
the above-described clip is supplied to the AV decoder 17b in
the form of a transport stream (TS) . In the present invention, the AV stream, which is reproduced through a main
path, is referred to as a main transport stream (hereinafter,
referred to as a "main stream") , and an AV stream other than
the main stream is referred to as a sub transport stream
(hereinafter, referred to as a "sub stream") . Thus, the
primary and secondary videos are supplied to the AV decoder
17b as a main stream and a sub stream, respectively. In the AV decoder 17b, a main stream from the optical disc 30 passes
through a switching element to a buffer RBl, and the buffered
main stream is depacketized by a source depacketizer 710a.
Data contained in the depacketized AV stream is supplied to an associated one of decoders 730a to 73Og after being
separated from the depacketized AV stream in a PID (packet identifier) filter-1 720a in accordance with the kind of the
data packet. As shown, the packets from the PID filter-1 720a may pass through another switching element before
receipt by the decoders 730b-730g.
On the other hand, each sub stream from the optical disc 30
or local storage 15 passes through a switching element to a
buffer RB2, the buffered sub stream is depacketized by a
source depacketizer 710b. Data contained in the depacketized
AV stream is supplied to an associated one of the decoders
730a to 73Og after being separated from the depacketized AV
stream in a PID filter-2 720b in accordance with the kind of
the data packet. As shown, the packets from the PID filter-2 720b may pass through another switching element before receipt by the decoders 730b-730f.
That is, the primary video is decoded in a primary video
decoder 730a, and the primary audio is decoded in a primary
audio decoder 73Oe. Also, the PG (presentation graphics), IG
(interactive graphics) , secondary audio, text subtitle are
decoded in a PG decoder 730c, an IG decoder 73Od, a secondary audio decoder 73Of, and a text decoder 73Og, respectively.
The decoded primary video, secondary video, PG, and IG are reproduced by a primary video plane 740a, a secondary video
plane 730b, a presentation graphics plane 740c, and an
interactive graphics plane 74Od, respectively. The
presentation graphics plane 740c can also reproduce graphic data decoded in the text decoder 73Og. The decoded primary
and secondary audios are output after being mixed in an audio
mixer. Since the sub path used to reproduce the secondary
video is synchronous with the main path in the sub path type
of FIG. 8A, the controller 12 performs a control operation
for outputting the secondary video synchronously with the
primary video in this case.
In the sub path type of FIG. 8A, in case that the primary
video is reproduced in a trick playing mode, the secondary
video may be reproduced synchronously with the trick playing
of the primary video, similar to the above-described case.
In accordance with an embodiment of the present invention, the controller 12 determines from a trick playing flag
whether or not the reproduced secondary video is to be
displayed during the trick playing mode; namely, whether the
secondary video window is to be closed. The content provider
sets the trick playing flag to a value that instructs whether or not the secondary video window is to be closed during
trick play of the primary video. If the content provider
desires the secondary video window to be closed during trick
playing of the primary video, the content provider may set the trick playing flag to a value of, for example, Λ0b' . If
the trick playing flag is set to a value of, for example, Λ0b',
the optical recording/reproducing apparatus 10 closes the
secondary video window in the trick playing mode of the
primary video.
On the other hand, if the trick playing flag is set to a
value (for example, λlb' ) other than the close indicating
value, the optical recording/reproducing apparatus 10 may
maintain the secondary video window in an open state, or
close the secondary video window. This may be optionally
implemented in the optical recording/reproducing apparatus 10.
Thus, the optical recording/reproducing apparatus 10 can
close the secondary video window even in case that the trick
playing flag has a value of λlb' . Under the condition in
which the secondary video window is maintained in an open
state, the secondary video is displayed synchronously with the trick playing of the primary video. For example, in case
that the primary video is forwardly reproduced at double
speed, the secondary video is also forwardly reproduced at
double speed. On the other hand, in case that the primary
video is backwardly reproduced, the secondary video is also
backwardly reproduced at the same speed as that of the
primary video. Thus, the secondary video reproduced in the
above-described manner is provided to the user. Furthermore, if the secondary video is closed, the secondary video decoder
730b may continue to decode the secondary video, but the
controller 12 prohibits the secondary video plane 740b from
being displayed. In this manner, the secondary video may
remain synchronous with the primary video. The trick playing flag may be included in PiP metadata.
Referring to FIG. 7, the content provider may provide a trick
playing flag field (for example, Λtrick_playing_flag' 910a),
and may set >trick_playing_flag' 910a to x0b' or λlb' , to
indicate whether or not the secondary video window should be
closed during a trick playing mode of the primary video.
In a sub path type shown in FIG. 8B, the secondary video is
encoded in a stream different from that of the primary video,
and the sub path is asynchronous with the main path. Similar
to the sub path type of FIG. 8A, the secondary video streams,
which will be reproduced through sub paths, are multiplexed
separate from a clip to be reproduced based on the associated playitem. However, the sub path type of FIG. 8B is different
from the sub path type of FIG. 8A in that the presentation of
the sub path can begin at any time on the timeline of the
main path. Once the sub path presentation is started, the
sub path presentation is then synchronized with the main path.
Referring to FIG. 8B, the playlist for managing the primary
and secondary videos includes one main path used to reproduce the primary video, and one sub path used to reproduce the
secondary video. The main path is configured by three
playitems ( ΛPlayItem_id' = 0, 1, 2), whereas the sub path is
configured by one subplayitem. The secondary video, which is reproduced through the sub path, is asynchronous with the
main path. That is, even in case that the subplayitem
includes information for identifying a playitem associated with the subplayitem, and presentation time stamp information
indicating a presentation time of the subplayitem in the
playitem, this information is invalid in the sub path type of
FIG. 8B. Accordingly, the optical recording/reproducing
apparatus 10 can operate irrespective of the above-described
information used to synchronize the main path and sub path.
Thus, the user can view the secondary video at any time
during the reproduction of the primary video.
In case that the sub path used to reproduce the secondary
video corresponds to the sub path type of FIG. 8B, a
reproduction of the secondary video can be started at any time, irrespective of the the primary video, because it is
unnecessary to reproduce the secondary video synchronously
with the primary video. However, the secondary video is
reproduced according to the trick playing of the primary
video, even in case that the trick playing flag according to the present invention is set to a value indicating to close
the secondary video window. It is the reason that once the
sub path started its presentation, the sub path presentation is synchronized with the main path. Of course, it is also
possible to close the secondary video window irrespective of
the trick playing flag. If the secondary video window is
closed, the secondary video may continue to be decoded, but
not displayed, as discussed above.
In a sub path type shown in FIG. 8C, the secondary video is
encoded in the same stream as the primary video, and the sub
path is synchronous with the main path. The case in which
the secondary video is multiplexed in a stream different from
that of the primary video, as described above, is referred to
as an λout-of-mux' type. The sub path type of FIG. 8C is
different from those of FIGs. 8A and 8B in that the secondary
video is multiplexed in the same AV stream as the primary
video. The case in which the secondary video is multiplexed
in the same stream as the primary video, as described above,
is referred to as an Λin-mux' type.
Referring to FIG. 8C, the playlist for managing the primary and secondary videos includes one main path and one sub path.
The main path is configured by four playitems ( ΛPlayItem_id'
= 0, 1, 2, 3), whereas the sub path is configured by a
plurality of subplayitems . Each of the subplayitems
configuring the sub path includes information for identifying
a playitem associated with the subplayitem, and presentation
time stamp information indicating a presentation time of the
subplayitem in the playitem. As described above with
reference to FIG. 8A, each subplayitem is synchronized with the associated playitem, using the above-described
information. Thus, the secondary video is synchronized with the primary video.
In the sub path type of FIG. 8C, each of the playitems
configuring the main path and an associated one or ones of
the subplayitems configuring the sub path refer to the same
clip. Accordingly, the secondary video is provided to the AV
decoder 17b, along with the primary video, as a main stream.
As shown in FIG. 9, the main stream, which is packetized data
including the primary and secondary videos, is depacketized
by the source depacketizer 710a, and is then sent to the PID
filter-1 720a. Data packets are separated from the
depacketized data in the PID filter-1 720a in accordance with
associated PIDs, respectively, and are then sent to
associated ones of the decoders 730a to 73Og, so as to be
decoded. That is, the primary video is output from the primary video decoder 730a after being decoded in the primary
video decoder 730a. The secondary video is output from the
secondary video decoder 730b after being decoded in the
secondary video decoder 730b. In this case, the controller
12 performs a control operation for displaying the secondary
video synchronously with the primary video.
In case that the sub path used to reproduce the secondary video corresponds to the sub path type of FIG. 8C, the
secondary video is reproduced synchronously with trick
playing of the primary video, similarly to the case of FIG.
8A. As described above with reference to FIG. 8A, it is possible to determine, using the trick playing flag, whether
or not the secondary video window, to which the secondary
video is output, should be closed. If the secondary video
window is closed, the secondary video may continue to be decoded,, but not displayed, as discussed above.
The main stream and sub stream may be provided from the
recording medium 30 or storage 15 to the AV decoder 17b.
Where the primary and secondary videos are stored in
different clips, respectively, the primary video may be
recorded in the recording medium 30, to be provided to the
user, and the secondary video may be downloaded from the
outside of the recording medium 30 to the storage 15. Of
course, the case opposite to the above-described case may be
possible. However, where both the primary and secondary videos are stored in the recording medium 30, one of the
primary and secondary videos may be copied to the storage 15,
prior to the reproduction thereof, in order to enable the
primary and secondary videos to be simultaneously reproduced.
Where both the primary and secondary videos are stored in the
same clip, they are provided after being recorded in the
recording medium 30. In this case, however, it is possible
that both the primary and secondary videos are downloaded
from the outside of the recording medium 30.
Referring to FIG. 7, the block header 910 may also include
information indicating a timeline referred to by the associated PiP metadata (hereinafter, referred to as
'pip^imeline^ype' ) . The type of the secondary video provided to the user is varied depending on the PiP timeline
type. Hereinafter, PiP timeline types according to embodiments of the present invention will be described with
reference to FIGs. 1OA to 1OC.
FIGs. 1OA to 1OC are schematic diagrams for understanding of
secondary video timeline types according to the present
invention.
The block data 920 may include time stamp information
indicating a point where PiP metadata is placed (hereinafter,
Λpip__metadata_time_stamp' ) . The λpip_timeline__type [k] ' is
determined in accordance with the type of the timeline
referred to by the entries of the above-described λpip_metadata_time_stamp [i] ' , namely, the type of the
timeline referred to by PiP metadata. Hereinafter, PiP
timeline types will be described in detail with reference to
λpip_timeline_type [k] ' and λpip_metadata_time_stamp [i] ' .
In the PiP timeline type of FIG. 1OA, the sub path used to reproduce the secondary video is synchronous with the main
path, and the entries of Λpip_metadata_time_stamp' refer to
the timeline of the playitem referred to by PiP metadata. In FIG. 1OA, Λpip_metadata_time_stamp' indicates presentation
times of the intervals of associated subplayitems which are
projected on the timeline of the playitem referred to by
ΛPlayItem_id[k] ' . In the timeline type of FIG. 1OA,
'pip__metadata_time_stamp [0] ' and Λpip_metadata_time_stamp [m] '
are put at the beginning points 101a and 105a of each of the
intervals that the associated subplayitem intervals are
projected on the timeline of the playitem referred to by
Λplayitem_d [k] ' , respectively.
The block data 920 includes at least one block of secondary
video composition information (hereinafter, referred to as
Λpip_composition_metadata' ) , the number of which is
determined in accordance with Λpip__metadata__time_stamp [i] ' .
The i-th λpip_composition_metadata' is secondary video
composition information which is valid between
λpip_metadata__time_stamp[i] ' 102a and
λpip_metadata time_stamp [i+1] ' 103a. The last Λpip_composition_metadata' in one block data 920 is valid
until the presentation end time 104a of the sub path
indicated by Λsecondary_video_stream_id [k] ' included in the
PiP metadata.
The secondary video composition information is information
indicating the reproduction position and size of the
secondary video. The secondary video composition information
may include position information of the secondary video, and size information of the secondary video (hereinafter,
referred to as Λpip_scale [i] ' ) . The position information of
the secondary video includes horizontal position information
of the secondary video (hereinafter, referred to as
Λpip_horizontal_position [i] ' ) , and vertical position information of the secondary video (hereinafter, referred to
as λpip_vertical_position [i] ' ) . The information
λpip_horizontal_position' indicates a horizontal position of
the secondary video displayed on a screen if viewing from an
origin of the screen, and the information
λpip_vertical_position' indicates a vertical position of the
secondary video displayed on the screen if viewing from the
origin of the screen. The display size and position of the
secondary video on the screen are determined by the size
information and position information.
In the timeline type of FIG. 1OA, the sub path indicated by
the above-described ^secondary video stream id[k]' corresponds to the sub path type 810 or 830 described with
reference to FIG. 8A or 8C because the sub path used to
reproduce the secondary video, namely, the PiP presentation
path, is synchronous with the main path. In a trick playing
mode of the primary video, accordingly, the secondary video
is reproduced synchronously with the trick playing of the
primary video. Of course, the optical recording/reproducing
apparatus 10 closes the secondary video window, to which the
secondary video is output, or maintains the secondary video
in an open state, in accordance with the trick playing flag.
In the timeline type of FIG. 1OA, the secondary video refers to the timeline of the main path because the secondary video
is reproduced synchronously with the playitems presented through the main path. That is, in case that the
presentation point of the main path used to reproduce the
primary video is positioned, for example, between
Λpip__metadata_time_stamp [i] ' and
Λpip__metadata__time__stamp [i+1] ' in a trick playing mode of the
primary video, λpip_composition_metadata [i] ' corresponding to λpip__metadata_time_stamp [i] ' is applied to the secondary
video. Accordingly, the secondary video is displayed on the
primary video.
FIG. 1OB illustrates the case in which the PiP presentation
path is asynchronous with the main path, and the timeline of
the sub path is referred to by the entries of λpip_metadata_time_stamp' . In the embodiment of FIG. 1OB,
the sub path indicated by the above-described
λsecondary_video_time_stamp_id [k] ' should correspond to the
sub path type described in conjunction with FIG. 8B because
the PiP presentation path is asynchronous with the main path. In the timeline type of FIG. 1OB, Λpip_metadata_time_stamp'
indicates a presentation time in the interval of the
subplayitem indicated by Λsecondary_video_stream_id [k] '
included in the PiP metadata. In this timeline type, λpip_metadata_time_stamp [0] ' may be put at the beginning
point 101b of the subplayitem.
In the timeline type of FIG. 1OB, the secondary video is
reproduced through the sub path, irrespective of the
reproduction procedure through the main path, because the
secondary video follows the timeline of the subplayitem.
That is, the timeline type of FIG. 1OB is different from the
timeline type of FIG. 1OA in that, even in case that the
presentation point of the main path is changed to a certain
point on the timeline of the playitem reproduced through the
main path, the secondary video is reproduced irrespective of
the change. For example, the presentation position and scale
of the secondary video do not change.
In the timeline type of FIG. 1OB, the PiP presentation path
is asynchronous with the main path, as described above.
Accordingly, the sub path indicated by the above-described λsecondary_video_time_stamp_id [k] ' should correspond to the
sub path type described in conjunction with FIG. 8B.
FIG. 1OC illustrates the case in which the PiP presentation
path is asynchronous with the main path, and the timeline of
the playitem referred to by λPlayItem_id [k] ' included in the
PiP metadata is referred to by the entries of
λpip__metadata_time_stamp' . Similar to the timeline type of
FIG. 1OA, the timeline of the playitem is referred to in the
timeline type of FIG. 1OC. Accordingly, λSubPlayItem_IN_time' is projected on the timeline of the
playitem at a point 102c. In the timeline type of FIG. 1OC, λpip_metadata_time_stamp' indicates a presentation time in
the interval of the playitem indicated by λPlayItem_id [k] ' .
In the timeline type of FIG. 1OC,
Λpip_metadata_time_stamp [0] ' may be put at the beginning
point 101c of the interval of the playitem indicated by
ΛPlayItem_id [k] ' because the PiP metadata refers to the
timeline of the playitem indicated by ΛPlayItem_id [k] ' .
However, in the case of the timeline type of FIG. 1OA,
λpip_metadata_time_stamp [0] ' is put at the beginning point
101a of the interval that the associated subplayitem interval
is projected on the timeline of the playitem referred to by
the Λplayitem_id[k] ' .
In the timeline type of FIG. 1OC, the secondary video can be
started, irrespective of the primary video, differently from the timeline type of FIG. 1OA, because the sub path used to
reproduce the secondary video is asynchronous with the main
path. During the trick playing of the primary video,
Λpip__composition_metadata' corresponding to the presentation
point of the main path is applied to the secondary video
because the PiP metadata refers to the timeline of the
associated playitem. Referring to FIG. 1OC, it can be seen
that, for example, in case that the presentation position of
the main path moves back from the position of λpip__metadata_time_stamp [i+1] ' to the position of
Λpip_metadata_time_stamp [i] ' in accordance with a backward
playing mode under the condition in which
Λpip_composition_metadata [i+1] ' corresponding to
Λpip_metadata_time_stamp [i+1] ' is applied to the secondary
video, λpip_composition_metadata [i] ' corresponding to Λpip__metadata_time_stamp [i] ' is applied to the secondary
video. Accordingly, the reproduction path and speed of the
secondary video, and the size and position of the secondary
video window, to which the secondary video is output, are
influenced by the trick playing of the primary video. Thus,
although the reproduction of the streams of the secondary
video is continued even during the trick playing of the
primary video, the reproduction path and speed, and the size
and position of the secondary video viewed by the user are
varied in accordance with the trick playing of the primary video .
In the timeline type of FIG. 1OC, the sub path indicated by
the above-described λsecondary_video_time_stamp_id [k] ' should
correspond to the sub path type described in conjunction with
FIG. 8B because the PiP presentation path is asynchronous
with the main path.
In the timeline type of FIG. 1OC,
λpip_metadata_time_stamp [i+1] ' is valid until the out time 104c of the current playitem because PiP metadata indicates
the presentation time in the interval of the playitem
referred to by ΛPlayItem__id [k] ' . After the subplayitem out
time 103c, however, the secondary video is no longer
displayed because the last Λpip_composition_metadata' in one
block data 920 is valid until the presentation end time of
the sub path indicated by λsecondary__video_stream_id [k] ' .
The present invention relates to a data reproducing method
for reproducing a secondary video in a trick playing mode of
a primary video, using a trick playing flag. The content
provider provides the trick playing flag to the user by
storing the trick playing flag in the database area of data
in case that the data is provided via a recording medium or a
network. The optical recording/reproducing apparatus 10 of
the present invention checks the trick playing flag stored in
the database area. Based on the identified trick playing
flag, the optical recording/reproducing apparatus 10 closes the secondary video window in a trick playing mode of the
primary video in case that the trick playing flag is set to a
value (for example, λ0b') indicating to close the secondary
video window. On the other hand, in case that the trick
playing flag is set to a value (for example, Λlb') other than
the close value, the optical recording/reproducing apparatus
10 may maintain the secondary video window in an open state,
or may close the secondary video window. In the timeline type in which the secondary video is
asynchronous with the primary video, the secondary video can
be reproduced through an original reproduction path thereof
irrespective of the trick playing of the primary video.
Accordingly, the trick playing flag may be valid in the
timeline type in which the secondary video is synchronous
with the primary video, namely, in the case in which the sub
path used to reproduce the secondary video corresponds to the
sub path type of FIG. 8A or 8C.
FIG. 11 is a flow chart illustrating a data reproducing
method according to an embodiment of the present invention.
If a trick playing command for the primary video is generated
(e.g., by user input) during reproduction of data stored in
the recording medium and/or storage (SIlO) , the primary video
is reproduced in accordance with the trick playing command.
The controller 12 checks the trick playing flag for the
secondary video (S120) , to determine whether or not to close the reproduced secondary video window (S130) .
In accordance with an embodiment of the present invention, if
the trick playing flag is set to a close value, the secondary video window is closed assuming the trick playing of the
primary video is begun in a state where the secondary video
window is open (S140) . However, if the trick playing of the
primary video is begun in a state where the secondary video
is closed, the secondary video window is not opened even if the display time point for beginning display of the secondary
video is reached. On the other hand, if that the trick
playing flag is set to a value other than the close value,
the secondary video window may be closed (S140) , or may be
opened (S150), in accordance with an option implemented in the optical recording/reproducing apparatus 10.
For the sub path type where the secondary video is asynchronous with the primary video, the secondary video can
be normally started irrespective of the primary video. In
this case, the controller 12 may not change a state of the
secondary video window based on the trick playing flag. That
is, even in case that the trick playing flag is set to a
value indicating to close the secondary video window, the
controller 12 may not close the secondary video window. Of
course, the controller 12 may close the secondary video
window. The secondary video is reproduced synchronously with
the primary video. On the other hand, where the secondary video is synchronous with the primary video, the secondary
video is reproduced synchronously with the primary video
(S160) . Even if the secondary video window is closed, the
secondary video should be synchronized with the primary video.
For example, even though not displayed, the secondary video
window may continue to be decoded, only the decoded output is
not provided to the user. After completion of the trick
playing of the primary video, the secondary video window may be opened.
In accordance with embodiments of the present invention, it
is possible to reproduce the secondary video along with the
primary video, even in the trick playing mode of the primary
video. The content provider can set whether or not the
secondary video reproduced in the trick playing mode of the
primary video should be provided to the user, using the trick
playing flag for the secondary video. Accordingly, there are
advantages in that it is possible to validly reproduce the secondary video along with the primary video, and to
implement more diverse secondary video.
As apparent from the above description, in accordance with
the recording medium, data reproducing method and apparatus,
and data recording method and apparatus of the present
invention, it is possible to reproduce the secondary video
along with the primary video even in the trick playing mode
of the primary video. In addition, it is possible to control whether or not the secondary video reproduced in the trick
playing mode of the primary video should be provided to the
user. Accordingly, there are advantages in that the content
provider can compose more diverse contents, to enable the
user to experience more diverse contents.
It will be apparent to those skilled in the art that various
modifications and variations can be made in the present invention without departing from the spirit or scope of the
inventions. Thus, it is intended that the present invention
covers the modifications and variations of this invention.

Claims

[CLAIMS]
1. A method of managing reproduction of at least one picture-
in-picture presentation path, comprising:
reading management data from a recording medium;
selectively displaying a secondary video stream with a
primary video stream based on the management data, the secondary video stream representing the picture-in-picture
presentation path with respect to a primary presentation path
represented by the primary video stream; and decoding the secondary video stream even if the
selectively displaying step does not display the secondary video stream.
2. The method of claim 1, wherein
the management data includes display information indicating
whether to close a window in which the secondary video stream
is to be displayed; and
the selectively displaying step displays the secondary video
stream based on the display information.
3. The method of claim 2, wherein the display information
indicates whether to close the window in which the secondary
video stream is to be displayed during trick play of the primary video stream.
4. The method of claim 3, wherein the selectively displaying
step selectively displays the secondary video stream based on
the display information only if the secondary video stream is
being reproduced synchronously with the primary video stream.
5. The method of claim 3, wherein the reading step reads
metadata from a playlist recorded on the recording medium,
the playlist indicating at least one playitem to reproduce, the playitem indicating a playing interval of the primary
video stream, and the metadata including the management data.
6. The method of claim 5, wherein
the metadata includes composition information indicating
a position to display the secondary video stream window; and
the selectively displaying step displays the secondary
video stream window at the position indicated by the composition information.
7. The method of claim 6, wherein
the composition information indicates a size to display the
secondary video stream window; and
the selectively displaying step displays the secondary video
stream window at the size indicated by the composition
information.
8. The method of claim 5, wherein
the composition information indicates a size to display the
secondary video stream window; and
the selectively displaying step displays the secondary video
stream window at the size indicated by the composition
information.
9. The method of claim 1, wherein the reading step reads metadata from a playlist recorded on the recording medium,
the playlist indicating at least one playitem to reproduce,
the playitem indicating a playing interval of the primary
video stream, and the metadata including the management data.
10. The method of claim 9, wherein the metadata includes composition information indicating
a position to display the secondary video stream; and
the selectively displaying step displays the secondary
video stream at the position indicated by the composition
information.
11. The method of claim 10, wherein
the composition information indicates a- size to display the
secondary video stream; and
the selectively displaying step displays the secondary video stream at the size indicated by the composition information.
12. The method of claim 9, wherein
the metadata includes composition information indicating a
size to display the secondary video stream; and the selectively displaying step displays the secondary video
stream at the size indicated by the composition information.
13. An apparatus for managing reproduction of at least one
picture-in-picture presentation path, comprising: a driver configured to drive a reproducing element for
reproducing data from a recording medium; a controller configured to control the driver to read
management data from the recording medium; the controller configured to selectively display a
secondary video stream with a primary video stream based on
the management data, the secondary video stream representing
the picture-in-picture presentation path with respect to a
primary presentation path represented by the primary video
stream; and
a decoder configured to decode the secondary video
stream even if the controller does not display the secondary
video stream.
14. The apparatus of claim 13, wherein
the management data includes display information indicating
whether to close a window in which the secondary video stream
is to be displayed; and
the controller is configured to selectively display the
secondary video stream based on the display information.
15. The apparatus of claim 14, wherein the display information indicates whether to close the window in which
the secondary video stream is to be displayed during trick
play of the primary video stream.
16. The apparatus of claim 15, wherein the controller is
configured to selectively display the secondary video stream
based on the display information only if the secondary video
stream is being reproduced synchronously with the primary
video stream.
17. The apparatus of claim 15, wherein the controller is
configured to control the driver to read metadata from a
playlist recorded on the recording medium, the playlist
indicating at least one playitem to reproduce, the playitem
indicating a playing interval of the primary video stream,
and the metadata including the management data.
18. The apparatus of claim 17, wherein
the metadata includes composition information indicating
a position to display the secondary video stream window; and
the controller is configured to display the secondary
video stream window at the position indicated by the
composition information.
19. The apparatus of claim 18, wherein the composition information indicates a size to display the
secondary video stream window; and
the controller is configured to display the secondary video
stream window at the size indicated by the composition
information.
20. The apparatus of claim 17, wherein
the metadata includes composition information indicating a
size to display the secondary video stream window; and
the selectively displaying step displays the secondary video
stream window at the size indicated by the composition
information.
21. The apparatus of claim 13, wherein the controller is
configured to control the driver to read metadata from a
playlist recorded on the recording medium, the playlist
indicating at least one playitem to reproduce, the playitem indicating a playing interval of the primary video stream,
and the metadata including the management data.
22. A recording medium having a data structure for managing
reproduction of at least one picture-in-picture presentation
path, comprising:
a data area storing a primary video stream, the primary
video stream representing a primary presentation path/ and a management area storing management data for managing
reproduction of a picture-in-picture presentation path with
respect to the primary presentation path, the management data
including display information indicating whether to close a
window in which a secondary video stream is to be displayed,
the secondary video stream representing the picture-in- picture presentation path.
23. The recording medium of claim 22, wherein the display
information indicates whether to close the window in which
the secondary video stream is to be displayed during trick
play of the primary video stream.
24. The recording medium of claim 22, wherein the management
area stores a playlist indicating at least one playitem to
reproduce, the playitem indicates a playing interval of the
primary video stream, and the playlist includes metadata that includes the management data.
25. The recording medium of claim 24, wherein the metadata
includes composition information indicating a position to
display the secondary video stream window
26. The recording medium of claim 24, wherein the metadata
includes composition information indicating a size to display the secondary video stream window.
27. The recording medium claim 22, wherein
the display information indicates whether to close the
window in which the secondary video stream is to be displayed
only if the secondary video stream is being reproduced
synchronously with the primary video stream.
28. A method of recording a data structure for managing
reproduction of at least one picture-in-picture presentation
path on a recording medium, comprising:
storing a primary video stream in a data area of the
recording medium, the primary video stream representing a
primary presentation path; and
storing management data for managing reproduction of a
picture-in-picture presentation path with respect to the
primary presentation path in a management area of the recording medium, the management data including display
information indicating whether to close a window in which a
secondary video stream is to be displayed, the secondary
video stream representing the picture-in-picture presentation
path.
29. The method of claim 28, wherein the display information indicates whether to close the window in which the secondary
video stream is to be displayed during trick play of the
primary video stream.
30. The method of claim 28, wherein the storing management
data step stores a playlist in the management area, the
playlist indicating at least one playitem to reproduce, the
playitem indicates a playing interval of the primary video
stream, and the playlist includes metadata that includes the management data.
31. The method of claim 30, wherein the metadata includes
composition information indicating a position to display the
secondary video stream window
32. The method of claim 30, wherein the metadata includes
composition information indicating a size to display the
secondary video stream window.
33. The method of claim 28, wherein
the display information is valid when the secondary
video stream is being reproduced synchronously with the
primary video stream.
34. An apparatus for recording a data structure for managing
reproduction of at least one picture-in-picture presentation
path on a recording medium, comprising: a driver configure to drive a recording element for
recording data on a recording medium; and
a controller configured to control the driver to store a
primary video stream in a data area of the recording medium,
the primary video stream representing a primary presentation
path; and
the controller configured to control the driver to store
management data for managing reproduction of a picture-in-
picture presentation path with respect to the primary
presentation path in a management area of the recording
medium, the management data including display information
indicating whether to close a window in which a secondary
video stream is to be displayed, the secondary video stream
representing the picture-in-picture presentation path.
35. The apparatus of claim 34, wherein the display information indicates whether to close the window in which
the secondary video stream is to be displayed during trick
play of the primary video stream.
36. The apparatus of claim 34, wherein the controller is
configured to control the driver to store a playlist in the
management area, the playlist indicating at least one
playitem to reproduce, the playitem indicates a playing interval of the primary video stream, and the playlist
includes metadata that includes the management data.
37. The apparatus of claim 36, wherein the metadata includes
composition information indicating a position to display the
secondary video stream window
38. The apparatus of claim 36, wherein the metadata includes
composition information indicating a size to display the
secondary video stream window.
39. The apparatus of claim 34, wherein
the display information indicates whether to close the
window in which the secondary video stream is to be displayed
only if the secondary video stream is being reproduced
synchronously with the primary video stream.
PCT/KR2006/003279 2005-08-22 2006-08-21 Recording medium, method and apparatus for reproducing data, and method and apparatus for recording data WO2007024078A1 (en)

Priority Applications (2)

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EP06769355A EP1938323A4 (en) 2005-08-22 2006-08-21 Recording medium, method and apparatus for reproducing data, and method and apparatus for recording data
JP2008527842A JP2009505327A (en) 2005-08-22 2006-08-21 Recording medium, data reproducing method and reproducing apparatus, data recording method and recording apparatus

Applications Claiming Priority (4)

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US70980705P 2005-08-22 2005-08-22
US60/709,807 2005-08-22
KR10-2006-0030107 2006-04-03
KR1020060030107A KR20070022578A (en) 2005-08-22 2006-04-03 Recording medium, method and apparatus for reproducing data and method and eapparatus for recording data

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EP (1) EP1938323A4 (en)
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KR (1) KR20080038221A (en)
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WO (1) WO2007024078A1 (en)

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RU2008110924A (en) 2009-09-27
US20070041709A1 (en) 2007-02-22
JP2009505327A (en) 2009-02-05
EP1938323A4 (en) 2010-04-28
EP1938323A1 (en) 2008-07-02
KR20080038221A (en) 2008-05-02

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