US20080059985A1 - Information recording medium and recording and/or reproducing apparatus and method - Google Patents

Information recording medium and recording and/or reproducing apparatus and method Download PDF

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Publication number
US20080059985A1
US20080059985A1 US11/738,077 US73807707A US2008059985A1 US 20080059985 A1 US20080059985 A1 US 20080059985A1 US 73807707 A US73807707 A US 73807707A US 2008059985 A1 US2008059985 A1 US 2008059985A1
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United States
Prior art keywords
information
recording medium
disc
information recording
recording
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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.)
Abandoned
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US11/738,077
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English (en)
Inventor
Shuichi Tasaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TASAKA, SHUICHI
Publication of US20080059985A1 publication Critical patent/US20080059985A1/en
Priority to US12/349,737 priority Critical patent/US8194515B2/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/122—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of an identification or authentication mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/125—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of carrier data format
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00224—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is obtained from a remote server
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/0042—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the copy protection scheme being related to a specific access protection standard
    • G11B20/00449—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the copy protection scheme being related to a specific access protection standard content scrambling system [CSS]
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00485—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier
    • G11B20/00492—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted
    • G11B20/00528—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file
    • 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
    • G11B20/00855—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a step of exchanging information with a remote server
    • 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
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • 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
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers 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
    • G11B27/30—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
    • G11B27/327—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
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1278—Physical format specifications of the record carrier, e.g. compliance with a specific standard, recording density, number of layers, start of data zone or lead-out

Definitions

  • aspects of the present invention relate to an information recording medium and a recording and/or reproducing apparatus and method used to guarantee reproduction compatibility.
  • optical information recording media such as optical discs
  • CDs compact discs
  • DVDs digital versatile discs
  • optical discs capable of having information written, erased, and reproduced thereon and therefrom can be sub-divided into a 650 MB compact disc-recordable (CD-R), a compact disc-rewritable (CD-RW), a 4.7 GB digital versatile disc+recordable/rewritable (DVD+R/RW), a digital versatile disc-random access memory (DVD-RAM), and a digital versatile disc-recordable/rewritable (DVD-R/RW).
  • an optical disc capable of only having information reproduced therefrom can be divided into a 650 MB CD disc and a 4.7 GB DVD-ROM disc.
  • optical disc having a recording capacity of 15 GB or more, such as a high-definition (HD) DVD or a blu-ray disc (BD).
  • HD high-definition
  • BD blu-ray disc
  • Unattended information terminal systems provide information to users in a variety of multimedia forms, such as voice audio files, images, graphic videos, text files, and moving pictures in order to allow users to easily and conveniently access and use the information.
  • a business model is currently being developed for a content-providing business in which a dedicated terminal system such as an unattended information terminal system is installed and a user can copy desired information from the unattended information terminal system onto a DVD-R.
  • a business model in which information is copied onto a personal computer (PC) drive of a user or a hard disc drive (HDD) mounted DVD recorder of the user, and then copied onto a DVD of the user, will be considered.
  • a disc key is assigned to distributed content in order to manage the copyrighted content of a copied disc.
  • the market has placed great importance on reproduction compatibility between the different types of information storage media available to users.
  • the disc must be able to be reproduced in most DVD players and recorders in the market.
  • aspects of the present invention provide an information recording medium and a recording and/or reproducing apparatus and method used to guarantee reproduction compatibility in consideration of the fact that content distribution may be performed according to various business models.
  • an information recording medium includes a management information zone in which management information is recorded, wherein the management information indicates an intended type of use of the information recording medium.
  • the management information includes at least one of user identification information indicating whether the information recording medium is for commercial use or personal use, wobble signal presence information indicating whether a wobble signal is present in a recorded track of the information recording medium, disc type information indicating a disc type of the information recording medium, and a revision code indicating compatibility information of the information recording medium.
  • the wobble signal presence information includes information about a frequency of the wobble signal.
  • the disc type information includes information indicating whether the information recording medium is a write-once optical disc, a rewritable optical disc, or an optical disc having limited data reproduction time.
  • the disc type information includes information indicating whether the information recording medium is a digital versatile disc-recordable (DVD-R) for a content scramble system (CSS) download disc or a digital versatile disc-rewritable (DVD-RW) for a CSS download disc.
  • DVD-R digital versatile disc-recordable
  • CSS content scramble system
  • DVD-RW digital versatile disc-rewritable
  • the management information zone is arranged in the form of land prepits of the information recording medium or is located in a control data zone of the information recording medium.
  • the management information is used to indicate whether the information recording medium is compatible with a business model in which content is distributed using a personal recording and/or reproducing apparatus or a business model in which the content is distributed using a dedicated commercial recording and/or reproducing apparatus.
  • an information recording medium includes a control data zone, wherein the control data zone includes physical format information indicating an intended type of use of the information recording medium, and the physical format information includes at least one of first information having a disc indicator code indicating a disc type of the information recording medium or a revision number code indicating a compatibility version of the information recording medium, or second information having a user indicator code indicating whether the information recording medium is for commercial use or personal use, or a wobble structure code indicating whether a wobble signal is present in a recorded track of the information recording medium.
  • the physical format information indicates whether the information recording medium is compatible with a business model in which content is distributed using a personal recording and/or reproducing apparatus or a business model in which the content is distributed using a dedicated commercial recording and/or reproducing apparatus.
  • a recording and/or reproducing apparatus records data on and/or reproduces data from an information recording medium, and includes a recording and/or reproducing unit to record data to and/or reproduce data from the information recording medium and a control unit to control the recording and/or reproducing unit to reproduce management information indicating an intended type of use of the information recording medium from the information recording medium and to record data in the information recording medium according to the reproduced management information.
  • a recording and/or reproducing method in which data is recorded to and/or reproduced from an information recording medium includes reproducing management information from the information recording medium to determine an intended type of use of the information recording medium from the information recording medium, and recording and/or reproducing data to and/or from the information recording medium according to the reproduced management information.
  • FIG. 1 illustrates a business model in which content is distributed using a dedicated commercial recording and/or reproducing apparatus
  • FIG. 2 illustrates a business model in which content is distributed using a personal recording and/or reproducing apparatus of a user
  • FIG. 3 is a graph showing a reproduction success rate in a digital versatile disc (DVD) player with respect to the structure of a disc;
  • FIG. 4 illustrates a track having no wobble in an optical disc
  • FIG. 5 illustrates a track having a wobble in an optical disc
  • FIG. 6 illustrates an information recording medium having recorded thereon management information according to an embodiment of the present invention
  • FIG. 7 illustrates an example of physical format information illustrated in FIG. 6 ;
  • FIG. 8 illustrates an example of ID 5 illustrated in FIG. 7 ;
  • FIG. 9 illustrates another example of ID 5 illustrated in FIG. 7 ;
  • FIG. 10 illustrates another example of the physical format information illustrated in FIG. 6 ;
  • FIG. 11 illustrates the structure of the disc indicator/revision number code illustrated in FIG. 10 ;
  • FIG. 12 illustrates the structure of the user indicator/wobble structure code illustrated in FIG. 10 ;
  • FIG. 13 illustrates a recording and/or reproducing apparatus using an information recording medium according to an embodiment of the present invention.
  • FIG. 14 is a flowchart illustrating a recording and/or reproducing method according to an embodiment of the present invention.
  • FIG. 1 illustrates a business model in which content is distributed using a dedicated commercial recording and/or reproducing apparatus 150 .
  • a key provider 110 distributes a key to protect copyrighted content.
  • the key provider 110 distributes a title key to a content provider 120 and a disc key to the dedicated commercial recording and/or reproducing apparatus 150 .
  • the key provider 120 may, for example, be the DVD copy control association (DVD CCA).
  • the content provider 120 encrypts the content to be transmitted using the title key in order to generate content scramble system (CSS) content and then transmits the generated CSS content to the dedicated commercial recording and/or reproducing apparatus 150 .
  • CSS content scramble system
  • the CSS is a protection system used by content owners to enable consumers to legally access high-quality DVD movies and TV programs, thus preventing illicit copying of content and protecting the content from copyright infringement.
  • a media manufacturer 130 provides a blank disc 140 having no disc key to the dedicated commercial recording and/or reproducing apparatus 150 .
  • the dedicated commercial recording and/or reproducing apparatus 150 then records the CSS content transmitted from the content provider 120 on the blank disc 140 using the disc key provided from the key provider 110 and outputs the disc 160 having the CSS content recorded thereon, i.e., a CSS-encrypted final disc 160 to a user.
  • FIG. 2 illustrates a business model in which content is distributed using a personal recording and/or reproducing apparatus 190 of a user.
  • the key provider 110 provides a title key to the content provider 120 and a disc key to the personal recording and/or reproducing apparatus 190 of the user.
  • the content provider 120 encrypts the content to be transmitted using the title key in order to generate CSS content and then transmits the generated CSS content to the personal recording and/or reproducing apparatus 190 of the user.
  • the media manufacturer 130 provides a blank disc 140 having no disc key to the content company 170 .
  • the content company 170 generates a disc 180 having a disc key from the blank disc 140 using the disc key provided from the key provider 110 and outputs the disc 180 to the user.
  • the user purchases the disc 180 having a disc key and loads the disc 180 into the personal recording and/or reproducing apparatus 190 of the user.
  • the personal recording and/or reproducing apparatus 190 of the user then records the CSS content transmitted from the content provider 120 onto the loaded disc 180 having a disc key, and outputs the disc 160 having the CSS content recorded thereon, i.e., the CSS-encrypted final disc 160 , to the user.
  • Discs 160 complying with the above-described business models already exist in the market. In order to prevent confusion for users, identification information indicating which business model a disc 160 is suited for has to be recorded on the disc 160 .
  • FIG. 3 is a graph showing a reproduction success rate in a DVD player with respect to the structure of the disc 160 .
  • one of the most effective ways to improve the reproduction success rate is to set book type information in a disc management zone of the disc 160 indicating that the disc 160 is a digital versatile disc read-only memory (DVD-ROM).
  • DVD-ROM digital versatile disc read-only memory
  • a reproduction success rate is improved compared to when the DVD player recognizes the disc 160 as a normal disc. It can be seen from FIG. 3 that a reproduction success rate in a normal disc 160 is 50%, while a reproduction success rate in a disc 160 having book type information recorded into the disc management zone indicating that the disc 160 is a ROM type disc 160 is 90%.
  • a recording track 400 (a “groove”) meanders according to a predetermined frequency, i.e., has a wobble, and a land 410 between tracks 400 includes an address pit called a land prepit (LPP) 420 .
  • LPP land prepit
  • FIG. 4 illustrates a track having no wobble 400 in the optical disc 160 .
  • frequency information that has to be contained in a wobble may be included in the LPPs 420 .
  • a DVD recorder recognizes the disc 160 as a DVD-R or a DVD-RW at the time of sensing a wobble, the wobble indicating a wave at a predetermined frequency in a recording groove. If book type information in the management zone which is reproduced by the DVD recorder shows that the disc 160 is a DVD-ROM, an error may occur due to a difference between the reproduced book type information and the recognized information.
  • the frequency of the wobble may be changed, for example, into double the frequency (2 ⁇ ) of a DVD-R/RW, or a recording groove having no wobble 400 may be formed. With the change of the physical characteristics of a wobble, the reproduction success rate of the DVD recorder is improved. It can be seen from FIG. 3 that a reproduction success rate in the 2 ⁇ wobble ROM is over 90% and a reproduction success rate in the ROM having no wobble is also over 90%.
  • CAV constant angular velocity
  • an optical disc 160 such as a DVD-R or a DVD-RW
  • data is recorded in a management zone along the inner circumference of the optical disc 160 .
  • a dedicated commercial recording and/or reproducing apparatus 150 FIG. 1
  • a recorder records data in a pre-written control zone along the inner circumference of the disc 160 after recording data in a data zone of the disc 160 .
  • management information such as information describing recording conditions, is stored in an LPP.
  • a user records data in a disc 160 that is pre-recorded by a content company using a user recording and/or reproducing apparatus 190 ( FIG. 2 ), and management information is stored in an LPP.
  • a wobble signal obtained from a wobbled groove at a predetermined frequency, e.g., 140 kHz, in a track of the disc 160 serves as the original signal of a reference clock signal used during recording performed by a conventional recorder.
  • the wobble signal is thus used to control disc rotation.
  • An LPP 420 is structured such that a pit portion in a land 410 of the disc 160 is positioned at the head of 8 wobble periods or second or third from the head of the 8 wobble periods and at the peak of the amplitude.
  • the LPP contains address information or recording condition information of the disc 160 , which has to be read by the conventional recorder.
  • the conventional recorder records data onto the disc 160 .
  • a wobble is an important feature.
  • reproduction compatibility in order to consider the two business models shown in FIGS. 1 and 2 and described above.
  • the disc 160 is a DVD
  • the compatibility of the DVD with a reproduction-only apparatus improves, but the compatibility with a recorder may not be necessarily improved if the discs 160 are not actually DVD-ROMs.
  • the recorder may recognize the DVD as a defective disc. When this occurs, the recorder will not be able to reproduce the DVD because DVD-Rs and DVD-RWs each have a wobble, while a DVD-ROM has no wobble and has only pits. To address this problem, a wobble may be removed or the basic frequency of a wobble may be changed.
  • FIG. 6 illustrates an information recording medium 600 having recorded thereon management information according to an embodiment of the present invention.
  • the information recording medium 600 provides a management information zone 610 to record management information.
  • the information recording medium 600 includes physical format information 620 as one part of the management information recorded in the management information zone 610 .
  • the physical format information 620 includes a user indicator code 630 , a wobble structure code 640 , and a disc type code 650 .
  • the physical format information 620 is not required to include each of the three codes described above, and may instead include at least one of the user indicator code 630 , the wobble structure code 640 , and the disc type code 650 without being limited to the example illustrated in FIG. 6 .
  • the management information is not required to be recorded in the management information zone 610 .
  • the user indicator code 630 is information indicating the intended type of use of the information recording medium 600 .
  • the user indicator code 630 may be information indicating whether the information recording medium 600 is used for commercial use or personal use. It is understood that the user indicator code may also be used to indicate other types of intended uses, such as use for a research lab or a private network.
  • the wobble structure code 640 is information indicating a structure applied to the information recording medium 600 .
  • the wobble structure code 640 includes information indicating whether the disc structure has a wobble, and further includes information indicating the wobble frequency if the disc structure has a wobble.
  • the disc type code 650 is information indicating the type of the information recording medium 600 .
  • the terms “information recording medium 600 ” and “disc 160 ” are used synonymously with each other.
  • the disc type code 650 includes information indicating whether the information recording medium 600 is a write-once disc 160 or a rewritable disc 160 and further includes information indicating whether the information stored on the information recording medium 600 may be reproduced for only a predetermined time after data is recorded onto the information recording medium 600 .
  • FIG. 7 illustrates an example of the physical format information 620 illustrated in FIG. 6 .
  • the physical format information 620 is stored in the form of an LPP.
  • an LPP data block is divided into areas defined by field IDs.
  • Information corresponding to ID 0 exists over all areas and information corresponding to ID 1 through ID 3 is repetitively stored in a lead-in area near the inner circumference of the disc 160 in a user data area.
  • field ID In each field ID, relative addresses within the same field ID are included in bit positions 1 , 2 , 3 and 4 , and other information is included in bit positions 5 , 6 , 7 , 8 , 9 , 10 , 11 and 12 .
  • a user indicator code and a wobble structure (disc type) code which are collectively management information according to an aspect of the present invention, are included in ID 5 .
  • the management information according to an aspect of the present invention is included in ID 5 in FIG. 7 , it is understood that the management information may be contained in any position that allows compatibility with a conventional information format.
  • FIG. 8 illustrates an example of ID 5 illustrated in FIG. 7 .
  • ID 5 includes a user indicator code 630 ranging from b 4 to b 7 and a wobble structure code 640 ranging from b 0 to b 3 .
  • ‘0000’ indicates a commercial model
  • ‘0001’ indicates a consumer model
  • other bits serve as reserved areas.
  • ‘0000’ indicates a structure having no wobble
  • ‘0001’ indicates a 2 ⁇ wobble structure with a wobble frequency of 280 kHz
  • ‘0010’ indicates a 3 ⁇ wobble structure with a wobble frequency of 420 kHz
  • ‘0011’ indicates a 4 ⁇ wobble structure with a wobble frequency of 560 kHz
  • other bits serve as reserved areas. It is understood that other frequencies of wobbles may also be used.
  • FIG. 9 illustrates another example of ID 5 illustrated in FIG. 7 .
  • ID 5 includes the user indicator code 630 ranging from b 6 to b 7 , a disc type code 650 ranging from b 4 to b 5 , and the wobble structure code 640 ranging from b 0 to b 3 .
  • ‘0000’ indicates a commercial model
  • ‘0001’ indicates a consumer model
  • other bits serve as reserved areas.
  • ‘00’ indicates a write-once disc
  • ‘01’ indicates a rewritable disc
  • ‘10’ indicates a write-once disc having limited data reproduction time
  • other bits serve as reserved areas.
  • wobble structure code 640 ‘0000’ indicates a structure having no wobble, ‘0001’ indicates a 2 ⁇ wobble structure with a wobble frequency of 280 kHz, ‘0010’ indicates a 3 ⁇ wobble structure with a wobble frequency of 420 kHz, ‘0011’ indicates a 4 ⁇ wobble structure with a wobble frequency of 560 kHz, and other bits serve as reserved areas. It is understood that the user indicator code 630 , wobble structure code 640 and disc type code 650 may have different values than those shown in FIGS. 8 and 9 and described above.
  • FIG. 10 illustrates another example of the physical format information 1000 illustrated in FIG. 6 .
  • the physical format information 1000 illustrated in FIG. 10 is recorded in the control data zone.
  • the physical format information 1000 is called pre-recorded physical format information.
  • the physical format information 1000 is called embossed physical format information.
  • the management information of the disc 160 may be recorded in an R-physical format information area as well as the control data zone.
  • the physical format information 1000 may also be recorded in the R-physical format information area, and other areas of the information recording medium as well.
  • BP 50 and BP 51 that are not used by the DVD formats.
  • the term “downloaded DVD” refers to a DVD having contents downloaded from a network recorded thereon.
  • a disc indicator/revision number code 1100 may be recorded in BP 50 and a user indicator/wobble structure code 1200 may be recorded in BP 51 , as will be described later with reference to FIGS. 11 and 12 .
  • the disc indicator/revision number code 1100 is not required to be recorded in BP 50
  • the user indicator/wobble structure code 1200 is not required to be recorded in BP 51 .
  • the LPP data block illustrated in FIG. 7 is recorded in the disc 160 in the form of an LPP, disc information can be obtained by reading the LPP data block even when the optical disc 160 does not have a control data zone.
  • an LPP data block cannot be read from a DVD-ROM due to differences between track structures, and when a recorder corresponding to a DVD-R or DVD-RW fails to reproduce an LPP, the disc 160 cannot be recognized.
  • a reproducer or a recorder can easily reproduce the physical format information 1000 .
  • FIG. 11 illustrates an example of the structure of the disc indicator/revision number code 1100 , also known as first information, illustrated in FIG. 10 .
  • a disc indicator code 1110 also known as a first value, uses bit positions b 4 through b 7 in order to identify the disc 160 .
  • ‘0100’ indicates a DVD-R for a CSS download disc
  • ‘0101’ indicates a DVD-RW for a CSS download disc
  • other bits serve as reserved areas.
  • bit ‘0100’ is not limited to indicating a DVD-R for a CSS download disc
  • bit ‘0101’ is not limited to indicating a DVD-RW for a CSS download disc
  • the other bits are not limited to serving as reserved areas.
  • a revision number code 1120 uses bit positions b 0 through b 3 in order to indicate recording compatibility. For example, ‘0000’ indicates revision 0.0, ‘0010’ indicates revision 1.0, ‘0100’ indicates revision 2.0, and other bits serve as reserved areas. However, it is understood that bit ‘0000’ is not limited to indicating revision 0.0, bit ‘0010’ is not limited to indicating revision 1.0, but ‘0100’ is not limited to indicating revision 2.0, and the other bits are not limited to serving as reserved areas.
  • compatibility information has been managed as a book type in BPO and a part version.
  • a disc indicator code corresponding to the book type is defined and a revision number code corresponding to the part version is defined.
  • the revision number code indicates recording compatibility
  • a recorder corresponding to revision 1.0 cannot record data in a disc 160 corresponding to revision 2.0.
  • revision 1.0 is set as a single layer disc version having a single recording layer
  • revision 2.0 is set as a dual layer disc version having two recording layers. Therefore, even when recording compatibility cannot be guaranteed due to developments in the format of a downloadable DVD, a recorder can identify a disc 160 by changing a revision code.
  • FIG. 12 illustrates an example of the structure of the user indicator code/wobble structure code 1200 , also known as second information, illustrated in FIG. 10 .
  • the user indicator/wobble structure code 1200 includes a user indicator code 1210 ranging from b 4 to b 7 and a wobble structure code 1220 ranging from b 0 to b 3 .
  • ‘0000’ indicates a commercial model
  • ‘0010’ indicates a consumer model
  • other bits serve as reserved areas.
  • ‘0000’ indicates a structure having no wobble
  • ‘0010’ indicates a 2 ⁇ wobble structure with a wobble frequency of 280 kHz
  • other bits serve as reserved areas.
  • the user indicator code 1210 is not limited to the format of the example shown in FIG. 12 .
  • FIG. 13 illustrates a recording and/or reproducing apparatus 1300 which uses the information recording medium 600 .
  • the recording and/or reproducing apparatus 1300 records data in the information recording medium 600 in which management information according to aspects of the present invention is recorded, and/or reproduces data from the information recording medium 600 .
  • the recording and/or reproducing apparatus 1300 includes a recording and/or reproducing unit 1310 and a control unit 1320 .
  • the recording and/or reproducing unit 1310 records data to and/or reproduces data from the information recording medium 600 according to the control of the control unit 1320 .
  • the control unit 1320 controls the recording and/or reproducing unit 1310 to record and/or reproduce data, and also processes data to be recorded to the information recording medium 600 and data that has been reproduced from the information recording medium 600 .
  • control unit 1320 controls the recording and/or reproducing unit 1310 to reproduce the physical format information 620 from the management information zone 610 of the information recording medium 600 and to receive the reproduced physical format information 620 from the recording and/or reproducing unit 1310 .
  • the control unit 1320 controls recording in the information recording medium 600 based on the reproduced physical format information 620 .
  • control unit 1320 controls the recording and/or reproducing unit 1310 such that data can be recorded to the information recording medium 600 according to the use type or the physical structure of the information recording medium 600 , based on the management information included in the physical format information 620 .
  • the control unit 1320 manages recording according to the management information included in the physical format information 620 as follows.
  • the user indicator code 640 includes information indicating whether the information recording medium 600 is intended to be used with a commercial model, such as a kiosk, or a consumer model, such as a PC.
  • the control unit 1320 recognizes the user indicator code 640 and manages data recording according to the user indicator code 640 .
  • the control unit 1320 performs a control operation which prevents recording from being performed.
  • the recording and/or reproducing apparatus 1300 can perform various different commands, such as, for example, ejecting the information recording medium 600 or displaying an error message.
  • the control unit 1320 recognizes the user indicator code 640 indicating that the information recording medium 600 is intended to be used with the commercial model. In this case, instead of attempting to record data to the information recording medium 600 , the control unit 1320 prevents recording, and may eject the information recording medium 600 or display a message indicating that the inserted information recording medium 600 is not intended for consumer use.
  • the control unit 1320 recognizes whether the information recording medium 600 has a structure having a wobble and further recognizes a wobble frequency if the information recording medium 600 has a structure having a wobble. Specifically, if the information recording medium 600 has a wobble, the control unit 1320 recognizes the wobble frequency based on the wobble structure code 640 ( FIG. 6 ) of the physical for mat information 620 reproduced from the information recording medium 600 . By inserting various basic wobble frequencies in the wobble structure code 640 , it is possible to prevent data from being erroneously recorded in a later developed non-compatible disc when the later-developed disc is loaded in a conventional device.
  • control unit 1320 recognizes the wobble structure code 640 reproduced from the information recording medium 600 , controls the recording and/or reproducing unit 1310 to record data when the wobble structure set in the wobble structure code 640 is a wobble structure that can be supported by the recording and/or reproducing apparatus 1300 , and performs a control operation to prevent recording to the disc 160 when the wobble structure is a wobble structure that cannot be supported by the recording/reproducing apparatus 1300 .
  • the control unit 1320 can eject the information recording medium 600 or display an error message to the user.
  • the incompatible recording and/or reproducing apparatus which may be, for example, capable of recording data in a 2 ⁇ wobble frequency disc, does not record data in the HD disc.
  • the recording and/or reproducing apparatus recognizes the HD disc as the same type as the 2 ⁇ wobble frequency disc and records data in the HD disc.
  • the recording and/or reproducing apparatus can recognize the HD disc as having a frequency that cannot be supported by the recording and/or reproducing apparatus and will eject the HD disc or display an error message to the user to stop recording.
  • the control unit 1320 recognizes whether the information recording medium 600 is a write-once disc, a rewritable disc, or a disc having limited data reproduction time based on the disc type code 650 of the physical format information 620 reproduced from the information recording medium 600 .
  • the control unit 1320 overwrites a user data zone of the disc 160 when the disc 160 is a rewritable disc. If the disc 160 is a write-once disc, the control unit 1320 ejects the disc without performing the overwrite operation. If the disc 160 is a rewritable disc, the control unit 1320 records data in a control data zone. However, when the disc 160 is a rewritable disc, a disc manufacturer performs pre-emboss processing on the disc in order to prevent the control data zone of the disk from being rewritten according to a general intention of a user. Thus, when the control data zone is provided in the form of an LLP, the book type is set as a DVD-ROM and the recording and/or reproducing apparatus 1300 cannot write data into the control data zone.
  • the operation of the control unit 1320 does not differ according to whether the loaded disc 160 is a write-once disc or a rewritable disc.
  • a rewritable disc such as a DVD-ROM uses a metal film, its reflectivity is generally lower than the reflectivity of a write-once disc such as a DVD-R.
  • the reproduction success rate of the rewritable disc is lower than the reproduction success rate of a write-once disc, such as a DVD-R, which uses a pigment material.
  • the control unit 1320 when the loaded disc 160 is a disc having limited data reproduction time, the control unit 1320 prevents the disc from being oxidized by packing the disc in a vacuum after data recording. For example, in the case of a disc having data that can be reproduced for only 48 hours, the transmissivity of PC resin used in a DVD degrades after 48 hours and thus data of the disc cannot be reproduced any more. Since data of this type of disc cannot be reproduced after 48 hours, the user may regard the disc as having an error. Thus, when the loaded disc 160 is a disc having limited data reproduction time, the control unit 1320 displays a message to the user indicating that downloaded content cannot be reproduced after 48 hours.
  • the physical format information 620 illustrated in FIG. 7 is taken as an example of information used to describe the structure and operation of the recording and/or reproducing apparatus 1300 , it can be easily understood by those skilled in the art that the physical format information 1000 illustrated in FIG. 10 may also be used in the same manner as the physical format information 620 illustrated in FIG. 7 .
  • FIG. 14 is a flowchart illustrating a recording and/or reproducing method according to an embodiment of the present invention.
  • the control unit 1320 of the recording and/or reproducing apparatus 1300 controls the recording and/or reproducing unit 1310 to reproduce management information from the management information zone of the information recording medium 600 .
  • the control unit 1320 controls the recording and/or reproducing unit 1310 to reproduce the management information from the management information zone of the information recording medium 600 and transmit the reproduced management information to the control unit 1320 .
  • control unit 1320 recognizes setting contents of the reproduced management information and manages the recording operation of the recording and/or reproducing apparatus 1300 according to the recognized contents in operation 1420 .
  • the control unit 1320 controls the recording and/or reproducing unit 1310 to record and/or reproduce data to and/or from the information recording medium 600 .
  • the control unit 1320 prevents recording and/or reproducing to the information storage medium 600 , and may eject the information recording medium 600 and/or display an error message indicating that the information recording medium 600 cannot be used in the recording and/or reproducing apparatus 1300 .
  • a recording and/or reproducing method can be embodied as code that is readable by a computer on a computer-readable recording medium.
  • the computer-readable recording medium includes all kinds of recording devices capable of storing data that is readable by a computer system. Examples of the computer-readable recording medium include read-only memory (ROM), random access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and carrier waves such as transmission over the Internet.
  • the computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. Also, functional programs, code, and code segments to implement aspects of the present invention can be easily construed by programmers skilled in the art.
  • aspects of the present invention guarantee reproduction compatibility between various types of discs which are being developed in the market, as various business models associated with content distribution are concurrently being developed.
US11/738,077 2006-09-04 2007-04-20 Information recording medium and recording and/or reproducing apparatus and method Abandoned US20080059985A1 (en)

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KR101365440B1 (ko) 2014-02-19
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EP2062257A1 (fr) 2009-05-27
KR101365447B1 (ko) 2014-02-19
KR20090009185A (ko) 2009-01-22
TW200813718A (en) 2008-03-16
KR20080021464A (ko) 2008-03-07
EP2073206A3 (fr) 2015-04-29
TW200926166A (en) 2009-06-16
EP2073206A2 (fr) 2009-06-24
TWI420521B (zh) 2013-12-21
EP2062257A4 (fr) 2009-11-18
US20090122672A1 (en) 2009-05-14
US8194515B2 (en) 2012-06-05

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