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
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/10527—Audio or video recording; Data buffering arrangements
  • G11B2020/10537—Audio or video recording
  • G11B2020/10592—Audio or video recording specifically adapted for recording or reproducing multichannel signals
• • 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
• • 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

Definitions

• the present invention relates to recording and reproducing
• Optical discs are widely used as a recording medium
• high-density optical recording mediums such as
• BD Blu-ray Disc
• HD-DVD high definition digital versatile disc
• Such a high-density optical recording medium which is
• the present invention relates to method of decoding
• reproduced from the recording medium is decoded using a
• reproduced data is decoded using a second decoder.
• secondary video stream represents picture-in-picture video
• the method further includes reproducing
• the main data stream includes the primary and secondary video streams. This embodiment may
• a main path data stream is
• the main path data stream includes the
• a sub path data stream is
• the second data file is separate from
• the sub path data stream includes
• This embodiment may include
• Yet another embodiment further includes displaying the
• the secondary video stream has a same scan type as the primary video stream.
• the method further includes receiving the
• the recording medium storing the sub path data stream
• the secondary video stream using a second decoder.
• the present invention also relates to a method of
• One embodiment of this method includes
• the primary video stream to a first decoder.
• the secondary video stream represents picture-in-picture video data with respect to the primary video stream.
• the present invention further relates to methods and apparatuses for recording picture-in-picture video data on
• 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
• FIG. 4 is a schematic diagram for understanding a concept
• FIG. 5 is a block diagram illustrating an overall configuration of an optical recording/reproducing
• FIG. 6 is a block diagram schematically illustrating an
• FIG. 7 is a schematic diagram illustrating an AV decoder
• FIG. 8A is a schematic diagram illustrating a first
• FIG. 8B is a schematic diagram illustrating a second embodiment of the encoding type of the secondary video
• FIGs. 9A to 9C are schematic diagrams illustrating various aspects of the present disclosure.
• FIG. 10 is a flow chart illustrating an exemplary
• optical disc as an example recording medium.
• BD Blu-ray disc
• the present invention is applicable to other recording
• HD-DVD high definition digital versatile disc
• Storage as generally used in the embodiments is a storage equipped in a optical recording/reproducing
• the storage is an element in which
• the user freely stores required information and data, to
• 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
• the optical recording/reproducing apparatus 10 according to the present invention
• recording/reproducing apparatus 10 may be designed to have
• optical recording/reproducing apparatus 10 will be described
• apparatus 10 of the present invention may be a drive which
• present invention not only has a function for recording
• external input signals may be digital multimedia
• the optical recording/reproducing apparatus 10 because the Internet is a medium easily accessible by any person.
• the audio stream of the original data may be provided as additional data via the audio stream
• Some users may desire to download the audio stream (for example, Korean audio stream) corresponding to
• FIG. 2 illustrates a file structure for reproduction
• the file structure of the present invention includes a
• playlist directory PLAYLIST a clip information directory CLIPINF, a stream directory STREAM, an auxiliary directory
• the JAR directory includes JAVA program files.
• the metadata directory META includes a file of data about
• Such a metadata file may
• the BD-J directory BDJO includes a BD-J object file for
• the auxiliary directory AUXDATA includes an additional
• auxiliary directory AUXDATA may include a "Sound. bdmv"
• the stream directory STREAM includes a plurality of files
• the stream directory STREAM uses "*.m2ts" as an extension
• AV stream video/audio/graphic information
• a title is composed of at least one AV stream
• a clip is collectively referred to as a "clip”. That is, a clip
• the playlist directory PLAYLIST includes a plurality of
• Playlist means a combination
• Each playing interval is a plurality of playing intervals of clips. Each playing interval is a plurality of playing intervals of clips. Each playing interval is a plurality of playing intervals of clips.
• a playlist may be a
• playlist files a process for reproducing data using at least one playitem in a playlist file is defined
• sub path one subplayitem is defined as a "sub path".
• Each playlist is associated with the master presentation. Each playlist
• Each playlist file should include one main path.
• Each playlist file should include one main path.
• each playlist file is a basic
• a secondary video through a sub path, is referred to as a secondary video.
• PiP picture-in- picture
• the backup directory BACKUP stores a copy of the files in the above-described file structure, in particular, copies
• the backup directory BACKUP is adapted to separately store
• FIG. 3 illustrates a data recording structure of the
• disc includes a file system information area recorded with
• index file recorded with the index file, object file, playlist files, clip-info files, and meta files (which are required for
• the areas are arranged in the above-
• This area is referred to as a "management area”.
• the file system information area and database area are included in the management area.
• FIG. 3 The areas of FIG. 3 are shown and described only for
• present invention is not limited to the area arrangement
• video may be encoded in the same stream as the primary
• video (referred to as in-mux) , or may be encoded in a
• the management area may be
• FIG. 4 is a schematic diagram for understanding of the
• the present invention provides a method for reproducing
• the present invention provides an
• video of the comments or episode is a secondary video 420.
• the secondary video 420 can be reproduced simultaneously with the primary video 410, from the beginning of the
• the reproduction of the primary video 410 may be begun
• videos 420 may be reproduced, separately from one another,
• primary video 410 can be reproduced along with an audio
• the secondary video 420 can be reproduced along with an audio 420a associated with the secondary video 420.
• the AV stream For reproduction of the secondary video, the AV stream, in
• the secondary video is encoded. Also, information as to
• presentation path type information (synchronous or asynchronous) may be provided as part of the encoding type
• the present invention provides a method capable of satisfying the above-described requirements,
• 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 signal processor 13, and a microprocessor 16.
• the pickup mainly includes a pickup 11, a servo 14, a signal processor 13, and a microprocessor 16.
• the management data includes
• the signal processor 13 also modulates
• the microprocessor 16 controls the
• the pickup 11, the servo 14, the signal processor 13, and the microprocessor 16 are also
• recording/reproducing unit collectively referred to as a "recording/reproducing unit”.
• recording/reproducing unit reads data from an optical disc
• recording/reproducing unit also receives an encoded signal
• the controller 12 downloads additional data present
• the controller 12 also reproduces the additional data
• optical disc 30 at the request of the user.
• the controller 12 produces
• the optical recording/reproducing apparatus 10 furthermore, will be described with reference to FIGs. 8A to 8C.
• the optical recording/reproducing apparatus 10 furthermore
• the playback system 17 includes an AV decoder 17b for decoding an AV signal.
• playback system 17 also includes a player model 17a for
• the player model 17a may be implemented
• playback system 17 is the player model itself.
• FIG. 6 is a schematic diagram explaining the playback
• the playback system can simultaneously reproduce the primary and
• Playback system means a collective reproduction
• processing means which is configured by programs
• the playback system is a system which can not only play back a
• a user event manager 171 may include a user event manager 171, a module manager 172,
• a metadata manager 173 an HDMV module 174, a BD-J module
• Each of the HDMV module 174 and BD-J module 175 has a
• Each of the HDMV module 174 and BD-J module 175 can be any of the HDMV module 174 and BD-J module 175 .
• the HDMV module 174 includes a command processor 174a. For reception and processing of the command, the HDMV module 174 includes a command processor 174a.
• the BD-J module 175 includes a Java Virtual Machine (VM) 175a, and an
• the Java VM 175a is a virtual machine in which an
• the module manager 172 functions not only to send user commands to the HDMV module 174 and BD-J module 175,
• a playback control engine 174 and BD-J module 175.
• presentation engine 177 decodes a particular stream
• playback control engine 176 includes playback control
• GPRs purpose registers
• control functions 176a mean the playback control engine
• the HDMV module 174 and BD-J module 175 receive user
• module 175 are also independent of each other. In order
• this function is carried out by the user event
• controller 171a On the other hand, when the user event manager 171 receives a user command generated through a
• 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
• the metadata manager 173 can also provide, to the user,
• plane means a conceptual model
• the secondary video plane is
• FIG. 7 schematically illustrates the AV decoder 17b
• the AV decoder In accordance with the present invention, the AV decoder
• 17b includes a secondary video decoder 730b for
• secondary video decoder 730b decodes the secondary video.
• the secondary video may be recorded in the recording medium 30 in a state of being contained in an AV stream,
• the secondary video may also be used to be supplied to the user.
• the secondary video may also be used to be supplied to the user.
• the secondary video may also be used to be supplied to the user.
• the AV stream is
• TS transport stream
• the AV stream which is
• main path reproduced through a main path
• main stream an AV stream other than the main
• sub transport stream is referred to as a sub transport stream or sub TS
• sub stream (hereinafter, also referred to as a "sub stream”) .
• 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
• the secondary video is separated from other data
• the packets from the PID filter-1 720a may pass through another switching element before receipt by the
• FIG. 8A illustrates a first embodiment of a method for
• secondary video is encoded together with the primary video.
• This encoding type can be called ⁇ in-mux.
• the playlist includes one main path
• the main path is a presentation path
• each sub path is a presentation
• Playitems ⁇ PlayItem-l' and ⁇ PlayItem-2' configuring the main path refer to associated clips to be reproduced
• the playitems ⁇ PlayItem-l' and
• ⁇ PlayItem-2' refer to a clip ⁇ Clip-0' . Accordingly, the
• Clip-0' is supplied to the AV decoder 17b as a main stream.
• SubPath-3' associated with the main path is configured by
• sub path refers to a clip to be reproduced.
• the sub path ⁇ SubPath-l' refers to the
• the sub path ⁇ SubPath-2' refers to a clip
• SubPath-2' and ⁇ SubPath-3' uses audio, PG, and IG streams included in the clip referred to by the associated
• the secondary video is
• ⁇ Clip-0' is decoded in a primary video decoder 730a
• the primary audio is decoded in a primary audio decoder
• FIG. 8B illustrates a second embodiment of the method for
• secondary video is encoded in a stream different from that
• the playlist includes one main path and two sub paths ⁇ SubPath-l' and ⁇ SubPath-2' .
• Playitems ⁇ PlayItem-l' and ⁇ PlayItem-2' are used to generate Playitems ⁇ PlayItem-l' and ⁇ PlayItem-2'.
• SubPath-l' and ⁇ SubPath-2' refer to clips ⁇ Clip-l' and ⁇ Clip-2' , respectively.
• the secondary video is
• the encoded secondary video namely, the clips ⁇ Clip-l' and ⁇ Clip-2' , are supplied to the AV decoder 17b as sub
• ⁇ out-of-mux' is referred to as an ⁇ out-of-mux' .
• the buffered sub stream is
• the packets from the PID filter-2 720b may pass
• decoders 730b-730f For example, when the ⁇ SubPath-l' is presented along with the main path, the secondary video
• the secondary audio is
• decoder 730a Accordingly, the user can view both the primary and secondary videos through the display 20.
• invention may be mainly classified into three types.
• FIG. 9A illustrates the case in which the encoding type of the secondary video is the ⁇ out-of-mux' type.
• primary and secondary videos includes one main path and
• the main path is configured by four
• sync_start_PTS_of_PlayItem' which indicates a presentation time of the subplayitem in the playitem.
• the playitem and subplayitem refer to different clips, respectively.
• the playitem is supplied to the AV decoder 17b as a main
• primary video contained in the main stream is decoded by the primary video decoder 730a after passing through the
• FIG. 9B illustrates the case in which the encoding ' type of
• the secondary video is the ⁇ out-of-mux' type
• secondary video is asynchronous with the primary video.
• primary and secondary videos includes one main path and
• the main path is configured by three
• the secondary video is configured by one subplayitem.
• the secondary video is configured by one subplayitem.
• reproduction of the secondary video through one sub path is begun at any time during the reproduction of the
• the primary video is the ⁇ out-of-mux' type, the primary video is
• secondary video is supplied to the AV decoder 17b as a sub stream, as described above with reference to FIG. 9A.
• FIG. 9C illustrates the case in which the encoding type of
• the secondary video is the ⁇ in-mux' type
• secondary video is synchronous with the primary video.
• the presentation path type of FIG. 9C is different from
• primary and secondary videos includes one main path and
• the main path is configured by four
• the subplayitems configuring the sub path includes information for identifying a playitem associated with the
• each subplayitem is synchronized with the associated
• the secondary video is synchronized with the primary video.
• the main stream which is packetized data including
• the main stream and sub stream may be supplied from the
• the primary video may be any different clips, respectively.
• the secondary video may be downloaded from the
• one of the primary and secondary videos may be copied to
• secondary videos are stored in the same clip, they are supplied after being recorded in the recording medium 30.
• the optical recording/reproducing apparatus 10 has a maximum transport stream bit rate set to a specific
• the set value is applied to both the stream containing
• the set value is 48 Mbps
• primary video is a stream having a bit rate of 40 Mbps
• the total bit rate is 70 Mbps. In this case, it is not
• content provider should provide content, taking into
• the primary and secondary videos can be encoded to a high definition (HD) grade or to a standard
• SD definition
• the secondary video should have a same scan
• FIG. 10 illustrates an exemplary embodiment of a data
• the secondary video should be presented along with the main path used to reproduce the primary video.
• the controller 12 checks whether the
• secondary video is encoded in a main stream, based on the
• the type of subpath may
• the type of the secondary video is an ⁇ in-mux' type
• secondary video is separated from the main stream, and is
• the encoding type of the secondary video is an ⁇ out-of-mux' type
• secondary video is separated from the sub stream, and is
• the controller 12 controls the AV decoder 17b
• the secondary video uses the same scan type
• secondary video is also scanned in a progressive manner on
• the secondary video is also scanned in an interlaced type on
• the reproduction can be efficiently carried out.

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Signal Processing For Digital Recording And Reproducing (AREA)
• Television Signal Processing For Recording (AREA)

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Citations (3)

• 2006
  • 2006-07-26 KR KR1020087004061A patent/KR20080033433A/ko not_active Application Discontinuation
  • 2006-07-26 WO PCT/KR2006/002939 patent/WO2007013764A1/en active Application Filing

Patent Citations (3)

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