EP1642287A1 - Information storage medium storing multi angle data, and recording method and reproducing apparatus thereof - Google Patents
Information storage medium storing multi angle data, and recording method and reproducing apparatus thereofInfo
- Publication number
- EP1642287A1 EP1642287A1 EP04774084A EP04774084A EP1642287A1 EP 1642287 A1 EP1642287 A1 EP 1642287A1 EP 04774084 A EP04774084 A EP 04774084A EP 04774084 A EP04774084 A EP 04774084A EP 1642287 A1 EP1642287 A1 EP 1642287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- angle
- blocks
- interleaved
- points
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000009191 jumping Effects 0.000 claims abstract description 32
- 230000003139 buffering effect Effects 0.000 claims description 4
- 238000004590 computer program Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1806—Pulse code modulation systems for audio signals
- G11B20/1809—Pulse code modulation systems for audio signals by interleaving
-
- 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
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
- G11B2020/10944—Real-time recording or reproducing, e.g. for ensuring seamless playback of AV data
-
- 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
- G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
- G11B2020/10953—Concurrent recording or playback of different streams or files
Definitions
- the present invention relates to multi angle data used when encoding andor decoding video object data, and more particularly, to an information storage medium which stores the multi angle data, a method of recording andbr reproducing the multi angle data, and an apparatus for recording andbr reproducing the multi angle data.
- Multi angle data is obtained by photographing a scene with several cameras at different angles and encoding a result of the photographing.
- a change of viewing angle of the photographed scene is desired during reproduction of contents including the multi angle data
- a change of angle command is sent to a reproducing apparatus, and the reproducing apparatus reproduces data of the scene photographed at the desired angle in response to the command.
- the multi angle data are divided into predetermined units and the units are alternately recorded using interleaving.
- a pickup of the reproducing apparatus must jump to other positions so as to detect and reproduce interleaved blocks at an angle or accomplish angle change while reading the multi angle data recorded using interleaving.
- an increase in sizes of the interleaved blocks results in an increase in the distance between a current position and a position to which a pickup of the reproducing apparatus must jump for angle change. In this case, seamless reproduction is not guaranteed.
- a size of an interleaved block is small, jumping of the pickup of the reproducing apparatus is frequently required during data reproduction that does not require angle change. Accordingly, it is important to adjust a size of an interleaved block appropriately.
- a jumping point allowing the reproducing apparatus to jump to other interleaved blocks at a different angle may be set within one interleaved block. In this case, a total number of jumping points must be appropriately determined so that the multi angle data is effectively reproducible. Disclosure of Invention Technical Solution
- the present invention provides an information storage medium on which multi angle data is recorded to enable seamless reproduction, and a method of recording and/ or reproducing the multi-angle data and an apparatus for recording andbr reproducing the multi angle data.
- the present invention also provides a method of determining a total number of angle points that allow a reproducing apparatus to jump to change reproduction positions within an interleaved block.
- multi angle data is effectively recordable so that the multi angle data is seamlessly without excessive jumping of a pickup for data reproduction.
- FIG. 1A illustrates a first angle data file
- FIG. IB illustrates a second angle data file
- FIG. 1C illustrates recording of the first and second angle data files using interleaving
- FIG. 2 illustrates the multi angle data of FIG. 1 recorded on an information storage medium
- FIG. 3 is a block diagram of a reproducing apparatus for seamlessly reproducing data, according to an embodiment of the present invention.
- FIG. 4 is a graph illustrating an amount of data stored in a read buffer during jumping of a pickup
- FIG. 5 illustrates a structure of a clip file recorded using interleaving to realize multi angle data, according to an embodiment of the present invention .
- FIG. 6 is a flowchart illustrating a method of calculating the distance S ANGLE_POINTS between two angle points and a length S of an extent, according to an EXTENT embodiment of the present invention. Best Mode
- an information storage medium on which multi angle data comprising at least one unit of angle data is recorded, wherein the multi angle data comprises interleaved blocks, each of which includes at least one predetermined sized packet, and the data of one angle are interleaved with the data of at least one other angle in units of the interleaved blocks, sizes of the interleaved blocks being integral multiples of sizes of integral numbered aligned units that include packets.
- Each of the interleaved blocks may include at least one angle point that allows a reproducing apparatus to continue data reproduction while jumping to other reproduction positions during reproduction of the angle data, a number of angle points includible in each of the interleaved blocks being integral multiples of a number of the aligned units.
- a method of recording multi angle data that includes interleaved blocks, each of which includes at least one angle point that allows a reproducing apparatus to jump to other reproduction positions during data reproduction, using interleaving, the method comprising computing a distance between angle points; compensating for an offset between the computed distance and a reproduction length of a packet comprising each of the interleaved blocks; computing a maximum number of angle points in one interleaved unit that is obtained when a possible longest jumping distance to which the reproducing apparatus can jump during data reproduction is smaller than or equal to a maximum jumping distance given by the reproducing apparatus; and making interleaved blocks based on the distance between angle points and a number of angle points, and recording the multi angle data on the interleaved blocks.
- an apparatus for reproducing multi angle data stored in interleaved blocks each of which includes at least one angle point allowing the apparatus to jump to other reproduction positions during data reproduction, the apparatus comprising a reading unit which reads the multi angle data; and a buffer which stores the read multi angle data, wherein the multi angle data comprises interleaved blocks, each of which includes at least one predetermined sized packet, and the angle data of one angle are interleaved with angle data of at least one other angle in units of interleaved blocks, sizes of the interleaved blocks being integral multiples of sizes of integral numbered aligned units that include packets.
- FIGS. 1A-1C illustrate multi angle data recorded using interleaving.
- the multi angle data comprises a first angle data file 110 as shown in FIG. 1 A and a second angl e data file 120 as shown in FIG. IB that contain audio/video (AN) data for respective angles.
- the first and second angle data files 110 and 120 are alternately and continuously recorded in an area 130 of an information storage medium as shown in FIG. 1C for fast change of angle views.
- the first and second angle data files 110 and 120 are divided into predetermined units and the predetermined units are recorded using interleaving. Accordingly, a pickup of a reproducing apparatus is not required to move a large distance to read data at a changed angle when angle views are changed, thereby guaranteeing seamless reproduction.
- Each predetermined unit of angle data included in data recorded on the information storage medium using interleaving is referred to as an extent.
- an extent is equivalent to an interleaved unit. That is, the extent indicates data recorded in a file system without a pause. Accordingly, jumping of a pickup of the reproducing apparatus to other extents is required to exactly read data for data reproduction.
- FIG. 2 illustrates the interleaved data of FIGS. 1A-1C recorded on an information storage medium 200.
- An AV stream indicates a bit stream comprising a plurality of source packets.
- a source packet is a 192-byte packet that includes a 188 byte MPEG-2 transport stream (TS) and a 4-byte header.
- TS MPEG-2 transport stream
- data is stored in sector units in an information storage medium.
- a sector is a basic unit of recording a file.
- a sector stored in a DVD is 2048 bytes long. Thus, a sector is comprised of several source packets.
- FIG. 3 is a simplified block diagram of a reproducing apparatus for seamlessly reproducing data.
- data stored in an information storage medium is read by a reading unit 310 and the read data is transmitted to a read buffer 330 via a demodulation unit 320.
- the read buffer 330 is used to buffer a bit stream that is to be transmitted to a decoder, and thus, use of the buffer guarantees seamless reproduction even during jumping of a pickup 305 in the reading unit 310.
- a source depacketizer 340 converts the bit stream that includes a plurality of source packets into an MPEG-2 TS packet and outputs the MPEG-2 TS packet.
- R A data rate of data transmitted from the reading unit 310 to the read UD buffer 330 via the demodulation unit 320; [27] (b) R : A maximum value of an encoding rate TS_recording_rate of an MPEG-2 TS TS i.e., a speed of outputting data to the decoder; and [28] (c) R : A maximum bit rate of a source packet stream.
- An MPEG-2 TS packet MAX is 188 byte long and inclusion of a 4-byte header into the MPEG-2 TS packet forms a source packet stream. Therefore, a maximum bit rate R equals (192/188) ' R .
- FIG. 4 is a graph illustrating an amount of data stored in the read buffer 300 during jumping of the pickup 305.
- ECCs error correcting codes
- the read buffer 330 When reading data stored in an information storage medium, the read buffer 330 is filled with the read data. Before the pickup jumps to a new position, the read buffer 330 must be filled with data as specified in Equation (1) so as to prevent underflow of the read buffer 330. That is, in order to prevent underflow of the read buffer 330, a length S of data that must be read to the read buffer 330 before jumping of the READ pickup must satisfy Equation (2).
- FIG. 5 illustrates a structure of a clip file recorded using interleaving to realize multi angle data.
- respective angle data of one angle are interleaved among angle data of at least one other angle to reduce jumping time and response time for angle change, thereby seamlessly changing angles.
- jumping is required not only for angle change but also for normal playback at a same angle, in order to detect and reproduce desired angle data.
- An interleaved block is considered an extent of a clip file.
- An extent may include a plurality of angle points allowing a pickup to jump to other angle data. Accordingly, a length S of the extent in sectors and a distance S EXTENT between two angle points must satisfy Equation (3).
- each distance S is an integral multiple of a length of a source packet ANGLE_POINTS , e.g., integral multiples of 192 byte s ; and [41] (iv) the length S of the extent, a total number of angle points in the extent, and EXTENT angle change time must meet the buffer occupancy rules defined in Equations (1) and (2). Examples of buffer parameters are shown in following Tables 1 and 2.
- the distance S between two angle points is shorter than the length S ANGLE_POINTS of the extent, and a maximum value of the access time T for angle change is EXTENT ACCESS obtained when jumping to a farthest angle point in a next unit of angle data from a current angle point in a current unit of angle data.
- a unit of angle data may be referred to an a plurality of blocks of data corresponding to a same time, wherein each block corresponds to data at a respective angle. Referring to FIG. 5, the data Angle 1-1, Angle 2-1 and Angle 3-1 may be considered the current unit of angle data and the data Angle 1-2, Angle 2-2 and Angle 3-2 may be considered a next unit of angle data.
- Equation (2) may be expressed as follows: ANGLE_POINTS
- FIG. 6 is a flowchart illustrating a method of calculating the distance S ANGLE_POINTS between two angle points and a length S of an extent, according to an EXTENT embodiment of the present invention.
- the distance S is ANGLE_POINTS calculated with given access time T and data output speed TS_recording_rate , ACCESS using Equation (3) (S610).
- S610 data output speed TS_recording_rate
- S620 lengths A and B of data that are reproduced at the data output speed TS_recording_rate for 500 ms and 1000 ms, respectively.
- a distance between angle points is preferably set between 500 ms and 1000 ms. Then, the distance S is ANGLEJ ⁇ INTS compared with the lengths A and B (S630). If the distance S ANGLEJ ⁇ INTS ⁇ the length A, the distance S is determined to be equivalent to the length A, ANGLEJ ⁇ INTS and if the length A ⁇ the distance S ANGLEJ ⁇ INTS ⁇ the length B, the distance S is determined to be equivalent to the length B ANGLEJ ⁇ INTS (S630).
- a maximum number M of angle points in an interleaved unit that satisfies that a longest jumping distance less than ( ⁇ ) a maximum jumping distance for the given access time T is calculated (S640). Since the available maximum jumping ACCESS distance of a reproducing apparatus is set by the reproducing apparatus, the longest jumping distance is calculated by 2 ' (angle number - 1) ' M ' S . Thus, the ANGLE_POINTS maximum number M can be computed using the computed longest jumping distance. Then, the length S of the extent equals to INT ' 3 and has M angle points.
- angle units each of which corresponds to data between two angle points in an angle data unit, are preferably aligned with sectors.
- Tables 1 and 2 show example values of the length S of an extent and the EXTENT distance S between two angle points computed using the above method.
- Table 1 shows example values of the length S and the distance S EXTENT when a scene is photographed at three angles.
- Table 2 shows example ANGLEJ ⁇ INTS values of the length S and the distance S when the scene is pho- EXTENT ANGLEJOINTS tographed at nine angles.
- extents of a file are aligned with sectors.
- a source packet is 192 bytes long and thus cannot be aligned with a sector of 2048 bytes. Therefore, three continuous sectors are grouped into an access unit.
- An access unit of three sectors is a minimum unit where an integral multiple of a length of a source packet is equal to a length of the access unit. In other words, where a sector has a length of 2048 bytes, a length of 32 source packets equals a length of three sectors, i.e., one access unit.
- the present invention may be realized as a computer program.
- codes and code segments that are the members of the present invention can be easily inferred by computer programmers in the art to which the present invention belongs.
- the computer program may be stored in a computer readable medium. When the computer program is read and executed by a computer, a method of recording a multi angle data is accomplished.
- the computer readable medium may be any medium, such as a magnetic recording medium, an optical recording medium, and a carrier waver medium.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48467203P | 2003-07-07 | 2003-07-07 | |
KR20030075825 | 2003-10-29 | ||
KR1020040022878A KR100608051B1 (en) | 2003-07-07 | 2004-04-02 | Information storage medium for multi angle data, and recording method and reproducing apparatus thereof |
PCT/KR2004/001662 WO2005004147A1 (en) | 2003-07-07 | 2004-07-06 | Information storage medium storing multi angle data, and recording method and reproducing apparatus thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1642287A1 true EP1642287A1 (en) | 2006-04-05 |
EP1642287A4 EP1642287A4 (en) | 2012-08-08 |
Family
ID=36147034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04774084A Ceased EP1642287A4 (en) | 2003-07-07 | 2004-07-06 | Information storage medium storing multi angle data, and recording method and reproducing apparatus thereof |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1642287A4 (en) |
JP (1) | JP4988340B2 (en) |
CA (1) | CA2510639C (en) |
MX (1) | MXPA05008086A (en) |
RU (1) | RU2301461C2 (en) |
TW (1) | TWI278834B (en) |
WO (1) | WO2005004147A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4420897B2 (en) * | 2002-10-15 | 2010-02-24 | サムスン エレクトロニクス カンパニー リミテッド | Information storage medium recorded with data structure supporting multi-angle and apparatus thereof |
KR100636129B1 (en) * | 2002-12-16 | 2006-10-19 | 삼성전자주식회사 | Information storage medium having data structure for multi-angle and apparatus therefor |
WO2005064612A1 (en) * | 2003-12-22 | 2005-07-14 | Koninklijke Philips Electronics N.V. | Method for recording information on a record medium, record medium containing information, and method and device for reading information from a record medium |
KR101571651B1 (en) | 2004-04-22 | 2015-12-04 | 테크니컬러, 인크. | Context dependent multi-angle navigation technique for digital versatile discs |
EP2209120A4 (en) * | 2007-11-09 | 2016-12-07 | Mitsubishi Electric Corp | Video information recording method and video information reproducing device |
KR20110068944A (en) | 2008-09-17 | 2011-06-22 | 파나소닉 주식회사 | Recording medium, playback device, and integrated circuit |
CN102355590B (en) | 2008-09-30 | 2014-11-12 | 松下电器产业株式会社 | Recording medium, playback device, system LSI, playback method, glasses, and display device for 3D images |
RU2522304C2 (en) * | 2009-02-19 | 2014-07-10 | Панасоник Корпорэйшн | Reproducing device, recording method, recording medium reproducing system |
EP2482563B1 (en) * | 2009-09-25 | 2017-02-15 | Panasonic Intellectual Property Management Co., Ltd. | Recording medium, reproduction device and integrated circuit |
CN103026713B (en) * | 2010-07-12 | 2016-02-24 | 皇家飞利浦电子股份有限公司 | Auxiliary data in 3D video broadcasting |
RU2632404C2 (en) * | 2012-04-13 | 2017-10-04 | Конинклейке Филипс Н.В. | Depth signaling data |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0798722A2 (en) * | 1996-03-19 | 1997-10-01 | Pioneer Electronic Corporation | Information recording medium, apparatus for recording the same and apparatus for reproducing the same |
EP0814475A1 (en) * | 1996-01-08 | 1997-12-29 | Kabushiki Kaisha Toshiba | Information recording medium, recording method and reproduction apparatus |
EP0847198A1 (en) * | 1995-09-29 | 1998-06-10 | Matsushita Electric Industrial Co., Ltd. | Method and device for recording and reproducing interleaved bit stream on and from medium |
US20030113096A1 (en) * | 1997-07-07 | 2003-06-19 | Kabushiki Kaisha Toshiba | Multi-screen display system for automatically changing a plurality of simultaneously displayed images |
US20030235404A1 (en) * | 2002-06-24 | 2003-12-25 | Seo Kang Soo | Recording medium having data structure for managing reproduction of multiple reproduction path video data for at least a segment of a title recorded thereon and recording and reproducing methods and apparatuses |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3091715B2 (en) * | 1997-06-30 | 2000-09-25 | 三洋電機株式会社 | Angle information reproducing device |
JPH11110950A (en) * | 1997-10-03 | 1999-04-23 | Nippon Columbia Co Ltd | Recording medium reproducing method and recording medium reproducer |
JP3389086B2 (en) * | 1998-02-23 | 2003-03-24 | 株式会社東芝 | Optical disc recording method, optical disc, reproducing method, and reproducing apparatus |
US6415101B1 (en) * | 1998-07-27 | 2002-07-02 | Oak Technology, Inc. | Method and system for scanning and displaying multiple view angles formatted in DVD content |
US6341330B1 (en) * | 1998-07-27 | 2002-01-22 | Oak Technology, Inc. | Method and system for caching a selected viewing angle in a DVD environment |
JP2002216460A (en) * | 2001-01-16 | 2002-08-02 | Matsushita Electric Ind Co Ltd | Information recording medium |
CN100581230C (en) * | 2003-04-24 | 2010-01-13 | 索尼株式会社 | Information processing device and information processing method for recording AV flow |
-
2004
- 2004-07-06 TW TW93120182A patent/TWI278834B/en active
- 2004-07-06 RU RU2005124285/28A patent/RU2301461C2/en active
- 2004-07-06 WO PCT/KR2004/001662 patent/WO2005004147A1/en active Application Filing
- 2004-07-06 MX MXPA05008086A patent/MXPA05008086A/en active IP Right Grant
- 2004-07-06 EP EP04774084A patent/EP1642287A4/en not_active Ceased
- 2004-07-06 JP JP2006518547A patent/JP4988340B2/en active Active
- 2004-07-06 CA CA2510639A patent/CA2510639C/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0847198A1 (en) * | 1995-09-29 | 1998-06-10 | Matsushita Electric Industrial Co., Ltd. | Method and device for recording and reproducing interleaved bit stream on and from medium |
EP0814475A1 (en) * | 1996-01-08 | 1997-12-29 | Kabushiki Kaisha Toshiba | Information recording medium, recording method and reproduction apparatus |
EP0798722A2 (en) * | 1996-03-19 | 1997-10-01 | Pioneer Electronic Corporation | Information recording medium, apparatus for recording the same and apparatus for reproducing the same |
US20030113096A1 (en) * | 1997-07-07 | 2003-06-19 | Kabushiki Kaisha Toshiba | Multi-screen display system for automatically changing a plurality of simultaneously displayed images |
US20030235404A1 (en) * | 2002-06-24 | 2003-12-25 | Seo Kang Soo | Recording medium having data structure for managing reproduction of multiple reproduction path video data for at least a segment of a title recorded thereon and recording and reproducing methods and apparatuses |
Non-Patent Citations (1)
Title |
---|
See also references of WO2005004147A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2510639C (en) | 2011-08-30 |
CA2510639A1 (en) | 2005-01-13 |
WO2005004147A1 (en) | 2005-01-13 |
MXPA05008086A (en) | 2005-09-21 |
RU2005124285A (en) | 2006-01-20 |
TW200502937A (en) | 2005-01-16 |
EP1642287A4 (en) | 2012-08-08 |
JP2007528568A (en) | 2007-10-11 |
JP4988340B2 (en) | 2012-08-01 |
TWI278834B (en) | 2007-04-11 |
RU2301461C2 (en) | 2007-06-20 |
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