US20050175326A1 - Recording medium having a data structure for backing up management files and recording and reproducing methods and apparatuses - Google Patents

Recording medium having a data structure for backing up management files and recording and reproducing methods and apparatuses Download PDF

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Publication number
US20050175326A1
US20050175326A1 US10/986,772 US98677204A US2005175326A1 US 20050175326 A1 US20050175326 A1 US 20050175326A1 US 98677204 A US98677204 A US 98677204A US 2005175326 A1 US2005175326 A1 US 2005175326A1
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Prior art keywords
directory
file
playlist
recording medium
data
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US10/986,772
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English (en)
Inventor
Byung Kim
Kang Seo
Sung Park
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LG Electronics Inc
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Individual
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Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, BYUNG JIN, PARK, SUNG WAN, SEO, KANG SOO
Publication of US20050175326A1 publication Critical patent/US20050175326A1/en
Priority to US11/657,645 priority Critical patent/US8107792B2/en
Abandoned legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C3/00—Drilling machines or drilling devices; Equipment therefor
    • B27C3/02—Stationary drilling machines with a single working spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G15/00—Boring or turning tools; Augers
    • B27G15/02—Drills for undercutting holes
    • 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
    • G11B27/19—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
    • G11B27/327—Table of contents
    • G11B27/329—Table of contents on a disc [VTOC]
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0092—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • 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
    • 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

Definitions

  • the present invention relates to high density recording media such as read-only blu-ray discs (BD-ROM).
  • BD-ROM read-only blu-ray discs
  • Optical discs are widely used as an optical recording medium.
  • a new high density optical recording medium such as the Blu-ray Disc (hereafter called as “BD”), for recording and storing a large amount of high definition video and audio data is under development.
  • HD-DVD high density optical recording medium
  • BD Blu-ray Disc
  • BD Blu-ray Disc
  • BD Blu-ray Disc
  • a recording medium according to the present invention includes a data structure for backing up management files.
  • the recording medium stores management files, that manage reproduction of data from the recording medium, and a back-up directory.
  • the back-up directory includes a copy of each management file as a respective back-up file.
  • the recording medium stores a database and a back-up directory.
  • the database includes at least one directory having at least one database file. Each database file is for managing, directly or indirectly, reproduction of data recorded on the recording medium.
  • the back-up directory includes a copy of the database.
  • the database may include an index file and a movie object file as general management files.
  • the index file provides a menu for selecting reproduction of data in the stream directory, and the movie object file links at least one menu selection with a playlist file.
  • the database may include a playlist directory and a clip information directory.
  • the playlist directory includes at least one playlist file providing timing information indicating a time interval for reproducing data in the stream directory
  • the clip information directory includes at least one clip information file providing a map for mapping the timing information into stream address information of the data in the stream directory.
  • the database and the copy of the database in the back-up directory have a same file structure.
  • the recording medium is an optical disc
  • the database is stored at an inner radial portion of the disc while the back-up directory is stored at an outer radial portion of the disc.
  • the recording medium stores at least one general management file, a playlist directory, a clip information directory, a stream directory and a back-up directory.
  • the stream directory includes at least one stream file of data.
  • the playlist directory includes a least one playlist file, and the clip information directory includes at least one clip information file.
  • the general management file is for managing reproduction of at least one playlist file, and the playlist file and clip information file are for managing reproduction of at least a portion of one stream file in the stream directory.
  • the back-up directory includes a copy of each general management file, the playlist directory and the clip information directory.
  • the playlist file provides timing information indicating a time interval for reproducing data in the stream directory
  • the clip information file provides a map for mapping the timing information into stream address information of the data in the stream directory
  • the present invention further provides apparatuses and methods for recording and reproducing the data structure according to the present invention.
  • FIG. 1 illustrates a file or data structure for managing data on a high density recording medium (e.g., a BD-ROM) in accordance with an example embodiment of the present invention
  • FIGS. 2A and 2B illustrate formats of a high density optical disc in accordance with example embodiments of the present invention
  • FIGS. 3-8 illustrate a file or data structure of the back-up files according to various embodiments of the present invention
  • FIG. 9A illustrates an embodiment of a file structure of the present invention in a tree form
  • FIG. 9B illustrates file system information recorded on an optical disc for the example of FIG. 9A ;
  • FIG. 10 illustrates an embodiment of an optical recording and reproducing apparatus of the present invention.
  • a “stream file” in the present invention means a file having actual user data recorded therein on the recording medium, an example of which will be described in detail with reference to FIG. 1 .
  • a “back-up” file in the present invention means a file for preserving data in a management file, an example of which will be described in detail with reference to FIG. 3 .
  • FIG. 1 illustrates a file or data structure for managing data on a high density recording medium in accordance with an example embodiment of the present invention.
  • an optical disc and more particularly, a BD-ROM will be used as an example of the high density recording medium.
  • the file structure of a BD-ROM includes at least one BDMV directory under a root directory.
  • the BDMV directory includes an index file index.bdmv and an object file MovieObject.bdmv, discussed in detail below as general (upper) files for securing user interactivity.
  • the BDMV directory also includes a stream directory STREAM, a playlist directory PLAYLIST, and a clipinfo directory CLIPINF.
  • the stream directory STREAM includes files of video and audio streams (called “AV streams”) recorded in particular formats on the disc.
  • An “AV stream” is recorded as well-known MPEG2 transport packets and the AV stream files (e.g., 01000.m2ts and 02000.m2ts) have a file name extension of “*.m2ts”.
  • the AV stream files are not recorded in the MPEG2 format.
  • a file name extension or expansion proper to the format will be used.
  • the file expansion name may be “*.txt”.
  • an AV stream file is sometimes called a clip stream file.
  • the clipinfo (or clip information) directory CLIPINF includes clip information or clipinfo files *.clpi, each having a one-to-one correspondence with an AV stream file.
  • a clipinfo file *.clpi has attribute information and timing information of the corresponding stream file and serves as a management file. More specifically, the information in the clipinfo file includes mapping information that enables mapping of a Presentation Time Stamp (PTS) to a Source Packet Number (SPN of a source packet in the corresponding AV stream file. This map is referred to as an Entry Point Map or “EP_map”.
  • PTS Presentation Time Stamp
  • SPN Source Packet Number
  • a stream file and the corresponding clipinfo file may be called a “clip”, collectively. Accordingly, the file “01000.clpi” in the clipinfo directory CLIPINF has attribute information and timing information on the file “01000.m2ts” in the stream directory STREAM, and the files “ 01000 .clpi” and “01000.m2ts” form a clip.
  • the playlist directory PLAYLIST includes playlist files *.mpls, each having at least one playitem PlayItem designating a playing interval of a particular clip.
  • the playitem PlayItem includes timing information on a play start time In-Time and play end time Out-Time of a particular clip desired to play, and identifies the clip by providing the clip information file name in a Clip_Information_File_name field.
  • the EP map of the named clipinfo file allows a particular stream address or position (e.g., SPN) of the corresponding stream file *.m2ts to be searched for and obtained such that reproduction of the playitem results in reproduction of the clip.
  • the playlist file *.mpls serves as a basic management file for playing a desired clip by providing at least one playitem PlayItem. Moreover, the playlist file *.mpls may also provide a sub-playitem SubPlayitem for managing reproduction of, for example, supplemental data, which may be reproduced synchronized or non-synchronized with the playitem PlayItem.
  • index file index.bdmv In the BD directory BDMV, there are an index file index.bdmv and an object file MovieObject.bdmv as general files for securing a user's interactivity.
  • the index file index.bdmv has an index table providing menu information and title information the user can select.
  • the MovieObject.bdmv provides navigation commands for, for example, executing a playlist, and may be called from a selection made in the index table.
  • these files are management files for reproducing, for example, files or portions of files from the STREAM directory.
  • these files e.g., index.bdmv file, MovieObject.bdmv file, playlist files, and clip information files
  • database files or navigation database files e.g., index.bdmv file, MovieObject.bdmv file, playlist directory PLAYLIST and clipinfo directory CLIPINO
  • index.bdmv file, MovieObject.bdmv file, playlist directory PLAYLIST and clipinfo directory CLIPINO may be collectively referred to as the database or navigation database.
  • the present invention provides for constructing a back-up directory or files for preserving the management files.
  • Various embodiments of data structures and methods for the back-up files will be described in detail below. But first, example embodiments of formats for an optical disc storing these data structures will be described with respect to FIGS. 2A and 2B .
  • FIG. 2A illustrates that the disc volume is organized into a File System Information Area, a Management File Area, an AV Stream Area and a Management File Back-Up Area.
  • the File System Information Area stores system information for managing the entire disc as will be described in more detail below with respect to FIGS. 9A and 9B .
  • the Management File Area includes a General Files area for recording the index file index.bdmv and the object file MovieObject.bdmv, and a PlayList & Clip Information area for recording the playlist directory PLAYLIST and the clipinfo directory CLIPINF. According, the Management Files Area may also be referred to as the Database Area.
  • the AV Stream Area is for recording the actual audio/video/graphic data.
  • the Management Files Back-up Area allocated separately from the existing management files area is for recording the back-up files and/or directories.
  • the Management Files Back-up Area is disposed at the outer radial portion of the disc.
  • FIG. 2B illustrates another embodiment of the disc volume format.
  • the embodiment of FIG. 2B is the same as the embodiment of FIG. 2A except that the Management Files Back-up Area is formed at an inner radial portion of the disc. More specifically, the Management Files Back-up Area follows the Management File Area.
  • the back-up files are not recorded on the same recording area of the disc as the management files. Therefore, the management file data and a back-up file data for preserving the management file data are recorded, not in one ECC block, but in separate ECC blocks. This enables regular reproduction by using the back-up file in case there is a defect in the ECC block of a particular management file.
  • back-up files may be only for backing-up the management files, and is applicable to all management files. That is, the back-up files are not limited to a particular management file, but may be formed for all of the management files on the optical disc.
  • the back- up files are recorded physically separate from an original Management Files Area. Particularly, the data of the management files and the data of the back-up files are not recorded in the same ECC Block.
  • FIG. 3 illustrates a file or data structure of the back-up files according to a first embodiment of the present invention.
  • each back-up file which is a copy of the corresponding management file, is stored in the same directory as the corresponding management file.
  • “_bup” has been added to the extension of an existing management file name to provide the corresponding back-up file name.
  • the back-up file of the index file “index.bdmv” is “index.bdmv_bup”.
  • this naming convention is but one example, and other naming conventions will be readily apparent.
  • the back-up file is formed in a directory having the respective management file positioned therein, without forming a separate directory for the back-up file. Therefore, the index file index.bdmv and the object file MovieObject.bdmv are management files in the BDMV directory, and the “index.bdmv_bup” and the MovieObject.bdmv_bup” back-up files are formed in the same BDMV directory.
  • the back-up file “*.mpls_bup” of the playlist file “*.mpls” is formed in the same playlist directory PLAYLIST
  • the back-up file “*.clpi_bup” of the clipinfo file “*.clpi” is formed in the same clipinfo directory CLIPINF.
  • no back-up files are formed for the stream files *.m2ts in the stream directory STREAM since they are not management files.
  • an optical recording and reproducing apparatus reproduces the management file and the back-up file existing in the same directory together, regardless of the existence of a defect in the management file, to reproduce the disc more stabily.
  • FIG. 4 illustrates a file or data structure of the back-up files according to a second embodiment of the present invention.
  • back-up files of the upper management files namely the index.bdmv and MovieObject.bdmv are formed in the same BDMV directory.
  • the back-up files for the other management files are recorded in separate, respective back-up file directories.
  • the separate back-up file directories are a back-up playlist directory PLAYLIST_BUP and a back-up clipinfo directory CLIPINF_BUP.
  • the back-up files “index.bdmv_bup” and “MovieObject.bdmv_bup” for the index file index.bdmv and the object file MovieObject.bdmv in the BDMV directory are formed in the BDMV directory.
  • the back-up files for the playlist file *.mpls and the clipinfo file *.clpi are recorded in the separate back-up directories “PLAYLIST_BUP”, and “CLIPINF_BUP”.
  • the back-up files in the back-up directories may or may not include the “_bup” or other naming convention to identify the files therein as back-up files.
  • an optical recording and reproduction apparatus reproduces the upper management files (e.g., index and MovieObject) and their associated back-up files in the BDMV directory regardless of defects in the upper management files.
  • the recording and reproducing apparatus reproduces the management files in their own directory (e.g., the playlist file *.mpls and the clipinfo file *.clpi) without reproducing their associated back-up files unless there is a defect in the management file directory.
  • a management file directory e.g., PLAYLIST and CLIPINF
  • the back-up files recorded in the relevant back-up directory e.g., PLAYLIST_BUP and CLIPINF_BUP
  • FIG. 5 illustrates a file or data structure of the back-up files according to a third embodiment of the present invention.
  • the embodiment of FIG. 5 is the same as the embodiment of FIG. 4 except that a separate “BDMV_Top BUP” directory exists in the BDMV directory, and the back-up files of the index file index.bdmv and the object file MovieObject.bdmv are recorded in the BDMV_Top_BUP directory instead of directly in the BDMV directory.
  • the back-up files in the back-up directories may or may not include the “_bup” extension or other naming convention to identify the files therein as back-up files.
  • an optical recording and reproducing apparatus uses management files in an existing BDMV directory, the playlist directory PLAYLIST, and clipinfo directory CLIPINF, if one or more of the above directories have defects, then the associated back-up directory the “PLAYLIST_BUP”, “CLIPINF_BUP”, and “BDMV_Top_BUP” are used.
  • the existing index file index.bdmv has a defect
  • the BDMV_Top_BUP back-up directory is used for reproduction of the disc by using the back-up index file in the BDMV_Top_BUP directory.
  • FIG. 6 illustrates a file or data structure of the back-up files according to a fourth embodiment of the present invention.
  • a back-up directory BACK-UP is formed in the BDMV directory.
  • the back-up directory BACK-UP includes a back-up file for each of the management files.
  • the back-up directory BACK-UP (or back-up database directory) includes the database files such as the index file index.bdmv, the object file MovieObject.bdmv, the playlist files “*.mpls” and the clipinfo file “*.clpi”.
  • the playlist files and clipinfo files may be recorded in a respective playlist directory PLAYLIST and clipinfo directory CLIPINF in the back-up directory BACK-UP. In this manner, the back-up directory BACK-UP replicates the database.
  • an optical recording and reproduction apparatus (e.g., the apparatus of FIG. 10 ) reproduces the disc by using the back-up management file in the back-up directory BACK-UP instead of the BDMV directory, if any one of the respective management files in the existing BDMV directory has a defect.
  • FIG. 7 illustrates a file or data structure of the back-up files according to a fifth embodiment of the present invention.
  • This embodiment is the same as the embodiment of FIG. 6 except that the back-up directory is called BDMV_BUP and is saved directly in the root directory, and not in the BDMV directory.
  • the root directory root of the BD-ROM is provided with two lower directories—one is the BDMV directory having the existing management film and the stream file *.m2ts, and the other the BDMV_BUP directory backing up only the management files in the BDMV directory.
  • the BDMV_BUP directory has the index file index.bdmv and the object file MovieObject.bdmv recorded thereon as backed-up upper management file, and the playlist directory PLAYLIST and clipinfo directory CLIPINF as lower directories.
  • the backed-up playlist files *.mpls and the clipinfo files *.clpi are recorded in these lower directories.
  • an optical recording and reproducing apparatus (e.g., the apparatus of FIG. 10 ) reproduces the disc by using the management files in the existing BDMV directory under the root directory. But, if there is a defect in any one of management files in the BDMV directory, the disc is reproduced by using the back-up management file in the BDMV_BUP directory under the root directory.
  • FIG. 8 illustrates a file or data structure of the back-up files according to a fifth embodiment of the present invention. While the previous embodiments were described using a BD-ROM as the example of the optical recording medium, this embodiment is described using a BD-RE as the example of the optical recording medium.
  • a root directory of the BD-RE may have a plurality of BDAV directories, each having “info.bdav”, “menu.*”, “mark.*” files as upper management files.
  • each BDAV directory includes a stream directory STREAM, a playlist directory PLAYLIST and a clipinfo directory CLIPINF, where the playlist directory and the clipinfo directory CLIPINF are for recording management files for managing the stream files in the stream directory STREAM.
  • FIG. 8 graphically illustrates this applicability.
  • the file structure having a back-up file of the present invention is applicable to, for example, a BD-WO (BD-Write Once).
  • FIGS. 9A and 9B illustrate a data structure for and methods of recording and reproducing file system information for managing the management and back-up files having a file structure according to the present invention.
  • FIG. 9A illustrates the file structure of the third embodiment ( FIG. 5 ) in a tree form for the purposes of explaining the file system information according to an embodiment of the present invention.
  • the circles in the FIG. 9A denote directories Directory, rectangles denote files in a directory, shaded circles or rectangles denote back-up directories or back-up files, unshaded circles and rectangles denote non-back-up directories and non-back-up files, and numbers of the directories and files are in series for identification purposes.
  • a serial number “ 8 ” denotes the PLAYLIST_BUP directory, meaning a back-up directory for the PLAYLIST directory having serial number of 5 .
  • a serial number “ 9 ” denotes the CLIPINF_BUP directory, meaning a back-up directory for the CLIPINF directory having a serial number of 6 .
  • a serial number 10 denotes a BDMV_Top_BUP directory, meaning a back-up directory produced separately for storing back-up files of the index file index.bdmv and the object file MovieObject.bdmv having serial numbers 3 and 4 , respectively.
  • the back-up directories have back-up files.
  • the PLAYLIST_BUP directory 8 has back-up files 18 , 19 , and 20 of the playlist files *.mpls 11 , 12 and 13
  • the CLIPINF_BUP directory 9 has a back-up files 21 and 22 of the clipinfo files *.clpi 14 and 15
  • the BDMV_Top_BUP directory 10 has back-up files 23 and 24 of the index file index.bdmv 3 and the object file MovieObject.bdmv 4 .
  • FIG. 9B illustrates a file table for recording file information for each file in the file structure in FIG. 9A , which is a portion of file system information recorded on the File system Information Area shown in FIG. 2A or 2 B.
  • an optical recording and reproducing apparatus e.g., the apparatus of FIG. 10 ) reads the file system information in the File system Information Area to know types of and positions of files recorded on the disc.
  • the file table shown in FIG. 9B has File Table Header information and has file information for each file (called a “File Record”) arranged in series.
  • Each File Record has information (File name record number) on a name of the file (file name), upper link (called as “Parent Link”) information providing the file name record number of a parent file record as link information in view of the file structure, a file record type for indicating kind of the file, and an attribute for indicating a file attribute.
  • the file record may have various kinds of information defined by standards and recorded thereon.
  • the file name record number will be the same as the series identification numbers used in FIG. 9A for the purposes of explanation.
  • the file record type sorts files into four kinds.
  • an optical recording and reproducing apparatus may identify kinds of files.
  • the attribute information Attribute is information on various attributes of the file. For example, a “Hidden” attribute for performing a hiding function of the file, and a “Read inhibit” attribute for performing a read inhibit function of the file may be defined. Each attribute is indicated with 1 bit flag. If the file has the attribute, the flag is indicated as “ 1 b ”, and if the file does not have the attribute, the flag is indicated as “ 0 b”.
  • the method for recording a file record will be described for the example of recording the directories “ 7 ”, “ 9 ”, and file “ 18 ” in FIG. 9A .
  • FIG. 10 illustrates an optical recording and reproducing apparatus of according to an embodiment of the present invention.
  • the apparatus includes a pickup portion 11 for reading data and file information from an optical disc; a servo 14 for controlling operation of the pickup portion 11 ; a signal processing portion 13 for restoring a reproduced signal received from the pickup portion 11 to a desired signal value or modulating a signal to be recorded into a signal recordable on the optical disc and transferring the modulated signal to the pickup portion 11 ; a memory 15 for temporarily storing the file information read from the optical disc; and a microcomputer 16 for controlling the above operations.
  • the above described elements may collectively be called a recording and reproducing portion 20 .
  • the microcomputer 16 reads file information, and sorts original management files and back-up files. If there is a defect on a particular file, the microcomputer 16 reads a back-up file of the defective file in view of a file structure, and uses the back-up file in managing reproduction of the disc.
  • the apparatus of FIG. 10 further includes an AV decoder 17 decoding output data from the signal processing portion 13 and providing the decoded data to the user under the control of a controlling portion 12 .
  • An AV encoder 18 converts an input signal into a signal of a particular format, for example, the MPEG2 transport stream, and provides the signal to the signal processing portion 13 , under the control of the controlling portion 12 , for recording of the signal on the optical disc.
  • the controlling portion 12 an element for controlling operation of entire optical recording and reproducing apparatus, serves to control the optical recording and reproducing apparatus in accordance with input received from a user through an interface with the user.
  • the controlling portion 12 for example, transfers the user's order to the microcomputer 16 in the recording and reproducing portion 20 .
  • the controlling portion 12 controls such that the user can not access the back-up file
  • the controlling portion 12 controls such that the user can not access to the back-up file.
  • the controlling portion 12 may also control the apparatus to record the file structure of the present invention on the disc.

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  • Engineering & Computer Science (AREA)
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  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Signal Processing (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
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  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Television Signal Processing For Recording (AREA)
US10/986,772 2004-02-11 2004-11-15 Recording medium having a data structure for backing up management files and recording and reproducing methods and apparatuses Abandoned US20050175326A1 (en)

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EP1716703A2 (en) 2006-11-02
KR101000389B1 (ko) 2010-12-13
BRPI0418525A (pt) 2007-05-15
RU2006132347A (ru) 2008-03-20
CN101095346A (zh) 2007-12-26
US8107792B2 (en) 2012-01-31
CN100556108C (zh) 2009-10-28
JP4719693B2 (ja) 2011-07-06
WO2005076754A3 (en) 2007-05-03
JP2007529083A (ja) 2007-10-18
RU2369922C2 (ru) 2009-10-10
TW200527408A (en) 2005-08-16
WO2005076754A2 (en) 2005-08-25
CN101882143A (zh) 2010-11-10
TWI308325B (en) 2009-04-01
KR20050080869A (ko) 2005-08-18
US20070154180A1 (en) 2007-07-05
KR20070003912A (ko) 2007-01-05

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