KR20030093861A - High density read only optical disc, and method for recording and reproducing an encoded data on them - Google Patents

High density read only optical disc, and method for recording and reproducing an encoded data on them Download PDF

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Publication number
KR20030093861A
KR20030093861A KR1020020031746A KR20020031746A KR20030093861A KR 20030093861 A KR20030093861 A KR 20030093861A KR 1020020031746 A KR1020020031746 A KR 1020020031746A KR 20020031746 A KR20020031746 A KR 20020031746A KR 20030093861 A KR20030093861 A KR 20030093861A
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South Korea
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data
recorded
optical disc
video
audio data
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KR1020020031746A
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Korean (ko)
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KR100896058B1 (en
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김진용
서상운
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엘지전자 주식회사
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Priority to KR1020020031746A priority Critical patent/KR100896058B1/en
Priority to EP05012457A priority patent/EP1571666A3/en
Priority to CN2005100747453A priority patent/CN1707674B/en
Priority to BR0305027-0A priority patent/BR0305027A/en
Priority to CN2005100747468A priority patent/CN1707675B/en
Priority to EP05012463A priority patent/EP1571667A3/en
Priority to MXPA04001184A priority patent/MXPA04001184A/en
Priority to PCT/KR2003/001096 priority patent/WO2003105152A1/en
Priority to CN2005100747434A priority patent/CN1707672B/en
Priority to EP03757205A priority patent/EP1509917A4/en
Priority to EP05012464A priority patent/EP1571668A3/en
Priority to JP2004512139A priority patent/JP4504187B2/en
Priority to CNB038009978A priority patent/CN100514482C/en
Priority to CN2005100747472A priority patent/CN1707676B/en
Priority to RU2004124954/28A priority patent/RU2302043C2/en
Priority to EP05012449A priority patent/EP1571664A3/en
Priority to EP05012456A priority patent/EP1571665A3/en
Priority to CA2458609A priority patent/CA2458609C/en
Priority to AU2003232663A priority patent/AU2003232663B2/en
Priority to CN2005100747449A priority patent/CN1707673B/en
Priority to EP03730892A priority patent/EP1512143A4/en
Priority to TW94125642A priority patent/TWI324765B/en
Priority to TW94125644A priority patent/TWI324766B/en
Priority to PCT/KR2003/001112 priority patent/WO2003105140A1/en
Priority to TW096132791A priority patent/TWI359409B/en
Priority to CN2007101427786A priority patent/CN101114493B/en
Priority to CNB038009447A priority patent/CN100359573C/en
Priority to AU2003241199A priority patent/AU2003241199A1/en
Priority to JP2004512131A priority patent/JP4805573B2/en
Priority to TW92115327A priority patent/TWI330358B/en
Priority to TW94125638A priority patent/TWI332195B/en
Priority to EP07017107A priority patent/EP1870892A3/en
Priority to TW94125646A priority patent/TWI333205B/en
Priority to US10/516,911 priority patent/US7599279B2/en
Priority to TW092115324A priority patent/TWI348692B/en
Priority to TW94125650A priority patent/TWI316230B/en
Priority to RU2005117863/28A priority patent/RU2421832C2/en
Publication of KR20030093861A publication Critical patent/KR20030093861A/en
Priority to US10/753,368 priority patent/US7542393B2/en
Priority to US10/753,372 priority patent/US7558175B2/en
Priority to US10/753,400 priority patent/US7577080B2/en
Priority to US10/753,401 priority patent/US7525889B2/en
Priority to US10/753,369 priority patent/US7266075B2/en
Priority to US10/753,373 priority patent/US7257075B2/en
Priority to RU2005117717/28A priority patent/RU2377666C2/en
Priority to RU2005117716/28A priority patent/RU2394289C2/en
Priority to JP2005184857A priority patent/JP4719518B2/en
Priority to JP2005184826A priority patent/JP4767599B2/en
Priority to JP2005184874A priority patent/JP4719519B2/en
Priority to JP2005184834A priority patent/JP4767600B2/en
Priority to JP2005184846A priority patent/JP4751653B2/en
Priority to JP2007213431A priority patent/JP4805884B2/en
Priority to US11/907,747 priority patent/US7542405B2/en
Priority to US12/385,913 priority patent/US8014248B2/en
Priority to US12/385,947 priority patent/US8351315B2/en
Application granted granted Critical
Publication of KR100896058B1 publication Critical patent/KR100896058B1/en
Priority to US12/453,914 priority patent/US20090303863A1/en
Priority to US12/458,258 priority patent/US7872960B2/en

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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
    • 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
    • G11B20/00253—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 stored on the record carrier
    • G11B20/00398—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 stored on the record carrier the key being stored in sync patterns
    • 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
    • G11B20/00253—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 stored on the record carrier
    • G11B20/00405—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 stored on the record carrier the key being stored by varying characteristics of the recording track, e.g. by altering the track pitch or by modulating the wobble track
    • 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
    • G11B20/00507—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 consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis
    • 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
    • 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
    • G11B20/1252—Formatting, e.g. arrangement of data block or words on the record carriers on discs for discontinuous data, e.g. digital information signals, computer programme data
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

Abstract

PURPOSE: A high density read-only optical disk, and a method for encoded reading and writing of the high density optical disk are provided to maintain read compatibility of an optical disk player with a rewritable optical disk, and prevent illegal copy of data recorded on a high density read-only optical disk. CONSTITUTION: An encoding system(300) encodes audio and video data by using third synchronous data or third and second synchronous data recorded at a preamble area. The encoding system writes and stores the encoded audio and video data at a physical cluster area of a BD-ROM(Blu-ray Disk Read Only Memory) where synchronous data not accorded with synchronous data of a BD-RW(Blu-ray Disk Rewritable) is written. The audio and video data are recorded in a discontinuous recording format.

Description

고밀도 재생 전용 광디스크와, 그 광디스크의 암호화 기록 및 재생방법 {High density read only optical disc, and method for recording and reproducing an encoded data on them}High density read only optical disc, and method for recording and reproducing an encoded data on them}

본 발명은, 대용량의 동영상 데이터와 오디오 데이터를 장시간 동안 재생할 수 있는 고밀도 재생 전용 광디스크와, 그 광디스크의 암호화 기록 및 재생방법에 관한 것이다.The present invention relates to a high-density reproduction-only optical disc capable of reproducing large-capacity video data and audio data for a long time, and an encryption recording and reproducing method of the optical disc.

일반적인 씨디(CD: Compact Disc)와 같은 광디스크에 비해 고화질의 비디오 데이터 및 오디오 데이터를 장시간 동안 기록 저장할 수 있는 대용량의 광디스크인 디브이디(DVD: Digital Versatile Disc)가 개발 출시되어, 널리 보급 사용되고 있는 데, 상기 디브이디의 종류에는, 재생 전용의 DVD-ROM, 1 회 기록 가능한 DVD-R, 그리고 재기록 가능한 DVD-RAM 또는 DVD-RW(DVD-Rewritable) 등이 있다.Digital Versatile Disc (DVD), a large-capacity optical disc that can record and store high-definition video data and audio data for a long time compared to an optical disc such as a general compact disc (CD: Compact Disc), has been developed and widely used. Examples of the DVD include a reproduction-only DVD-ROM, a write once DVD-R, a rewritable DVD-RAM or a DVD-RW (DVD-Rewritable).

한편, 최근에는 고밀도 재기록 가능 광디스크, 예를 들어 고밀도 재기록 가능한 블루레이 디스크(BD-RW: Blu-ray Disc Rewritable)에 대한 구체적인 규격화 작업이 관련업체들간에 논의되고 있는 데, 이에 대해 상세히 설명하면 다음과 같다.Recently, the standardization of high density rewritable optical discs, for example, high density rewritable Blu-ray Disc Rewritable (BD-RW) has been discussed among related companies. Same as

도 1은, 고밀도 재기록 가능 광디스크, 예를 들어 BD-RW의 기록 유니트 블록(RUB: Recording Unit Block)을 도시한 것으로, 상기 BD-RW(100)에는, 런인(Run-in) 영역, 물리적 클러스터(Physical Cluster) 영역, 런아웃(Run-out) 영역 및 제3 가아드(Guard_3) 영역으로 구성되는 하나의 기록 유니트 블록(RUB)이 기록 저장되거나, 또는 런인 영역, 물리적 클러스터 영역 및 런아웃 영역이 2 개 이상 반복됨과 아울러, 마지막 부분에 제3 가아드(Guard_3) 영역이 구성되는 시퀀스의 기록 유니트 블록들(RUBs)이 기록 저장될 수 있다.FIG. 1 shows a recording unit block (RUB) of a high-density rewritable optical disc, for example, a BD-RW. The BD-RW 100 includes a run-in area and a physical cluster. One recording unit block (RUB) consisting of a (Physical Cluster) area, a Run-out area, and a third Guard_3 area is recorded or stored, or the run-in area, the physical cluster area, and the runout area are 2 In addition to being repeated more than two times, the recording unit blocks (RUBs) of the sequence in which the third guard (Guard_3) region is formed in the last portion may be recorded and stored.

한편, 상기 런인(Run-in) 영역은, 도 2에 도시한 바와 같이, 제1 가아드(Guard_1) 영역과 프리앰블 영역(PrA: Preamble)으로 구성될 수 있는 데, 상기 프리앰블 영역에는, 제1 동기 데이터(Sync_1)와 제2 동기 데이터(Sync_2)가 각각 포함 기록되며, 상기 제1 동기 데이터와 제2 동기 데이터는, 24 비트의 동기 바디(Sync body)와 6 비트의 동기 아이디(Sync ID)로 이루어진다.Meanwhile, as illustrated in FIG. 2, the run-in area may include a first Guard_1 area and a preamble area Prer (PrA), and the first preamble area may include a first area. The synchronization data Sync_1 and the second synchronization data Sync_2 are respectively recorded and recorded, and the first synchronization data and the second synchronization data are each composed of a 24-bit sync body and a 6-bit sync ID. Is made of.

그리고, 상기 제1 및 제2 동기 데이터는, 서로 다른 고유의 동기 아이디에 의해 각각 구별되는 데, 예를 들어 상기 제1 동기 데이터에는, '000 100'의 값을 갖는 동기 아이디가 기록되고, 상기 제2 동기 데이터에는, '010 000'의 값을 갖는 동기 아이디가 기록될 수 있다.The first and second synchronization data are distinguished by different unique synchronization IDs. For example, a synchronization ID having a value of '000 100' is recorded in the first synchronization data. In the second synchronization data, a synchronization ID having a value of '010 000' may be recorded.

한편, 상기 런아웃(Run-out) 영역은, 도 3에 도시한 바와 같이, 포스트 앰블(PoA: Post-amble) 영역과 제2 가아드(Guard_2) 영역으로 구성될 수 있는 데, 상기 포스트 앰블(PoA) 영역에는, 제3 동기 데이터(Sync_3)가 포함 기록되며, 상기 제3 동기 데이터는, 24 비트의 동기 바디와 6 비트의 동기 아이디로 이루어지되, 상기 제1 및 제2 동기 데이터에 포함 기록된 동기 아이디와는 서로다른 6 비트의 동기 아이디, 예를 들어 '000 001'의 값을 갖는 고유의 동기 아이디가 기록될 수 있다.Meanwhile, as illustrated in FIG. 3, the run-out area may include a post-amble (PoA) area and a second guard_2 area. In the PoA) area, third sync data Sync_3 is included and recorded, and the third sync data includes a 24-bit sync body and a 6-bit sync ID, which are included in the first and second sync data. A unique sync ID having a value of 6 bits, for example, '000 001', which is different from the sync ID, may be recorded.

그리고, 상기 물리적 클러스터(Cluster) 영역에는, 동영상의 비디오 데이터와 오디오 데이터가 기록 저장되는 데, 상기 클러스터 영역에 기록 저장되는 비디오 및 오디오 데이터는, 상기 런인 영역 및 런아웃 영역에 포함 기록된 동기 데이터를 기반으로 동기되어 독출된 후, MPEG 디코더(Decoder)와 같은 재생신호 처리부를 통해 원래의 비디오 및 오디오 신호로 재생 출력된다.Video data and audio data of a moving picture are recorded and stored in the physical cluster area, and video and audio data recorded and stored in the cluster area are recorded in the run-in area and run-out area. After being read in synchronization with the base, it is reproduced and output as original video and audio signals through a reproduction signal processing unit such as an MPEG decoder.

한편, 최근에는 BD-RW와 같은 고밀도 재기록 가능 광디스크에 대응되는 고밀도 재생 전용 광디스크, 예를 들어 BD-ROM의 개발이 확실시 예상되고 있는 데, 상기 BD-ROM과 같은 고밀도 재생 전용 광디스크는, 동영상의 비디오 데이터 및 오디오 데이터가 불연속적으로 기록되는 고밀도 재기록 가능 광디스크와의 재생 호환성을 유지할 수 있어야 하며, 또한 불법 복제를 방지할 수 있어야 하는 데, 이에 대한 효율적인 해결 방안이 아직 마련되어 있지 않은 실정이다.On the other hand, recently, it is anticipated that development of a high-density reproduction-only optical disc corresponding to a high-density rewritable optical disc such as a BD-RW, for example, a BD-ROM, is expected. It should be possible to maintain playback compatibility with high-density rewritable optical discs in which video data and audio data are discontinuously recorded, and also to prevent illegal copying. However, there is no effective solution yet.

따라서, 본 발명은 상기와 같은 실정을 감안하여 창작된 것으로서, 동영상의 비디오 데이터 및 오디오 데이터가 불연속적인 기록 포맷으로 기록 저장되는 BD-RW와 같은 고밀도 재기록 가능 광디스크와의 재생 호환성을 유지함과 아울러, 불법 복제를 방지할 수 있도록 비디오 데이터 및 오디오 데이터를 암호화하여 기록 및 재생하기 위한 고밀도 재생 전용 광디스크와, 그 광디스크의 암호화 기록 및 재생방법을 제공하는 데, 그 목적이 있는 것이다.Accordingly, the present invention was created in view of the above-described circumstances, and maintains playback compatibility with a high-density rewritable optical disc such as BD-RW in which video data and audio data of a moving picture are recorded and stored in a discontinuous recording format. SUMMARY OF THE INVENTION An object of the present invention is to provide a high-density reproduction-only optical disc for encrypting, recording, and reproducing video data and audio data so as to prevent illegal duplication, and a method of encrypting and reproducing the optical disc.

도 1은 재기록 가능한 블루레이 디스크(BD-RW)의 기록 유니트 블록(RUB)을 도시한 것이고,FIG. 1 shows a recording unit block RUB of a rewritable Blu-ray Disc BD-RW,

도 2는 재기록 가능한 블루레이 디스크(BD-RW)의 기록 유니트 블록(RUB)에 포함되는 런인(Run-in) 영역의 구성을 도시한 것이고,FIG. 2 shows the configuration of a run-in area included in a recording unit block RUB of a rewritable Blu-ray Disc BD-RW,

도 3은 재기록 가능한 블루레이 디스크(BD-RW)의 기록 유니트 블록(RUB)에 포함되는 런아웃(Run-out) 영역의 구성을 도시한 것이고,FIG. 3 shows the configuration of a run-out area included in a recording unit block RUB of a rewritable Blu-ray Disc BD-RW,

도 4는 본 발명의 실시예에 따른 재생 전용 블루레이 디스크(BD-ROM)의 기록 유니트 블록(RUB)에 포함되는 런인(Run-in) 영역의 구성을 도시한 것이고,FIG. 4 shows the configuration of a run-in area included in a recording unit block RUB of a reproduction-only Blu-ray disc BD-ROM according to an embodiment of the present invention.

도 5는 본 발명의 실시예에 따른 재생 전용 블루레이 디스크(BD-ROM)의 기록 유니트 블록(RUB)에 포함되는 런아웃(Run-out) 영역의 구성을 도시한 것이고,FIG. 5 shows a configuration of a run-out area included in a recording unit block RUB of a reproduction-only Blu-ray disc BD-ROM according to an embodiment of the present invention.

도 6은 본 발명의 실시예에 따른 암호화 기록방법이 적용되는 암호화 기록 시스템과 재생 전용 블루레이 디스크(BD-ROM)를 개념적으로 연계시켜 도시한 것이고,FIG. 6 conceptually illustrates an encryption recording system to which an encryption recording method according to an embodiment of the present invention is applied and a reproduction-only Blu-ray disc (BD-ROM).

도 7은 본 발명의 실시예에 따른 암호화 데이터 재생방법이 적용되는 광디스크 장치의 구성을 도시한 것이고,7 is a block diagram of an optical disk apparatus to which an encrypted data reproduction method according to an embodiment of the present invention is applied.

도 8은 본 발명의 실시예에 따른 암호화 데이터 재생방법에 대한 동작 흐름도를 도시한 것이다.8 is a flowchart illustrating an operation of a method of reproducing encrypted data according to an embodiment of the present invention.

※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing

1 : 광디스크2 : 광픽업1: optical disc 2: optical pickup

3 : 데이터 독출부4 : 재생신호 처리부3: data reading unit 4: reproduction signal processing unit

5 : 제어부6 : 버퍼부5 control unit 6 buffer unit

100 : BD-RW200 : BD-ROM100: BD-RW200: BD-ROM

300 : 암호화 기록 시스템300: encrypted recording system

상기와 같은 목적을 달성하기 위한 본 발명에 따른 고밀도 재생 전용 광디스크는, 동영상의 비디오 데이터 및 오디오 데이터가 기록되는 데이터 기록영역에, 상기 비디오 및 오디오 데이터가 불연속적인 기록 포맷으로 기록 저장됨과 아울러, 상기 비디오 및 오디오 데이터가 암호화되어 기록 저장되어 있는 것을 특징으로 하며,In order to achieve the above object, the high-density playback-only optical disc according to the present invention is recorded and stored in a discontinuous recording format in the video recording area in which video data and audio data of a moving picture are recorded. The video and audio data is encrypted and stored,

또한, 본 발명에 따른 고밀도 재생 전용 광디스크의 암호화 기록방법은, 고밀도 재생 전용 광디스크에 포함 기록된 동기 데이터를 기반으로, 동영상의 비디오 데이터 및 오디오 데이터를 암호화하는 1단계; 및 상기 암호화된 비디오 및 오디오 데이터를 불연속적인 기록 포맷으로 기록 저장하는 2단계를 포함하여 이루어지는 것을 특징으로 하며,In addition, the encryption recording method of the high-density reproduction-only optical disc according to the present invention comprises: a first step of encrypting video data and audio data of a moving picture based on synchronous data recorded in the high-density reproduction-only optical disc; And recording and storing the encrypted video and audio data in a discontinuous recording format.

또한, 본 발명에 따른 고밀도 재생 전용 광디스크의 암호화 데이터 재생방법은, 고밀도 재생 전용 광디스크에 포함 기록된 동기 데이터를 검색 독출하는 1단계; 상기 독출된 동기 데이터를 기반으로, 동영상의 비디오 데이터 및 오디오 데이터를 해독하는 2단계; 및 상기 해독된 비디오 및 오디오 데이터를 원래의 비디오 및 오디오 신호로 디코딩하여 재생신호 처리하는 3단계를 포함하여 이루어지는 것을 특징으로 한다.In addition, the encrypted data reproduction method of the high-density reproduction-only optical disc according to the present invention comprises: a step of searching for and reading the synchronous data recorded in the high-density reproduction-only optical disc; Decoding video data and audio data of a moving picture based on the read synchronization data; And decoding the decoded video and audio data into original video and audio signals to process a reproduction signal.

이하, 본 발명에 따른 고밀도 재생 전용 광디스크와, 그 광디스크의 암호화 기록 및 재생방법에 대한 바람직한 실시예에 대해, 첨부된 도면을 참조하여 상세히 설명한다.DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the high-density reproduction-only optical disc and the method for encrypting recording and reproducing the optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

우선, 본 발명에 따른 고밀도 재생 전용 광디스크, 예를 들어 BD-ROM에는, 도 1 내지 도 3을 참조로 전술한 바와 같이, 동영상의 비디오 데이터 및 오디오 데이터가 불연속적으로 기록되는 BD-RW(100)에서와 같이, 런인(Run-in) 영역, 물리적 클러스터(Cluster) 영역, 및 런아웃(Run-out) 영역, 그리고 제3 가아드(Guard_3) 영역이 포함 구성되는 기록 유니트 블록(RUB)이 적어도 하나 이상이 포함 기록될 수 있는 데, 참고로, 상기 영역들은 새로운 다른 명칭의 영역들로 변경 지정될 수 있다.First, as described above with reference to Figs. 1 to 3, a high-definition playback-only optical disc according to the present invention, as described above with reference to Figs. ), At least one recording unit block (RUB) including a run-in area, a physical cluster area, a run-out area, and a third Guard_3 area includes at least One or more may be included and recorded. For reference, the areas may be changed and designated as new other named areas.

한편, 본 발명의 실시예에 따른 BD-ROM(200)의 런인 영역은, 도 4에 도시한 바와 같이, 제1 가아드(Guard_1) 영역과 프리앰블 영역(PrA)이 포함 구성될 수 있으며, 상기 프리앰블 영역에는, 24 비트의 동기 바디(Sync body)와 6 비트의 동기 아이디(Sync ID)로 이루어진 동기 데이터들이 포함 기록될 수 있는 데, 이때, 상기 프리앰블(PrA) 영역에 포함 기록되는 동기 데이터들은, BD-RW(100)의 프리앰블 영역에 포함 기록되는 동기 데이터들과는 상이한 동기 데이터들이 기록 저장된다.Meanwhile, as illustrated in FIG. 4, the run-in area of the BD-ROM 200 according to the embodiment of the present invention may include a first guard (Guard_1) area and a preamble area (PrA). In the preamble area, synchronization data including a 24-bit sync body and a 6-bit sync ID may be included and recorded. In this case, the sync data included in the preamble (PrA) area may be recorded. The synchronization data different from the synchronization data recorded in the preamble area of the BD-RW 100 is recorded and stored.

예를 들어, 상기 BD-RW(100)의 프리앰블 영역에는, '000 100'의 동기 아이디를 갖는 제1 동기 데이터(Sync_1)와, '010 000'의 동기 아이디를 갖는 제2 동기 데이터(Sync_2)가 각각 순차적으로 포함 기록되는 반면, 상기 BD-ROM(200)의 프리앰블 영역에는, '000 001'의 동기 아이디를 갖는 제3 동기 데이터(Sync_3)와, '010 000'의 동기 아이디를 갖는 제2 동기 데이터(Sync_2)가 각각 순차적으로 포함 기록될 수 있다.For example, in the preamble area of the BD-RW 100, first sync data Sync_1 having a sync ID of '000 100' and second sync data Sync_2 having a sync ID of '010 000' are included in the preamble area of the BD-RW 100. Are sequentially included and recorded, respectively, in the preamble area of the BD-ROM 200, third sync data Sync_3 having a sync ID of '000 001' and a second sync ID of '010 000'. Synchronization data Sync_2 may be recorded in succession.

또한, 상기 BD-RW(100)의 런아웃 영역에 포함 구성되는 포스트 앰블(PoA) 영역에는, '000 001'의 동기 아이디를 갖는 제3 동기 데이터(Sync_3)가 포함 기록되는 반면, 상기 BD-ROM(200)의 런아웃 영역에 포함 구성되는 포스트 앰블(PoA) 영역에는, '000 100'의 동기 아이디를 갖는 제1 동기 데이터(Sync_1)가 포함 기록될 수 있다.In addition, in the postamble (PoA) area included in the run-out area of the BD-RW 100, third sync data Sync_3 having a sync ID of '000 001' is recorded and recorded, whereas the BD-ROM is recorded. In the postamble PoA area included in the runout area 200, first sync data Sync_1 having a sync ID of '000 100' may be included and recorded.

즉, 상기 BD-ROM(200)의 프리앰블 영역 또는 포스트 앰블 영역에 포함 기록되는 동기 데이터들을, 상기 BD-RW(100)의 프리앰블 영역 또는 포스트 앰블 영역에 포함 기록되는 동기 데이터들과 서로 일치하지 않도록 다르게 기록하게 된다.That is, the synchronous data recorded in the preamble area or the post amble area of the BD-ROM 200 do not coincide with the synchronous data recorded in the preamble area or the postamble area of the BD-RW 100. You will write differently.

그리고, 상기와 같이 BD-RW(100)에서의 동기 데이터들과는 서로 일치되지 않는 동기 데이터들이 기록된 BD-ROM(200)의 클러스터 영역에는, 불법 복제를 방지하기 위한 암호화된 A/V 데이터가 기록 저장될 수 있는 데, 예를 들어 도 6에 도시한 바와 같이, 상기 BD-ROM(200)의 클러스터 영역에 암호화된 데이터를 기록하기 위한 암호화 기록 시스템(300)에서는, 상기 프리앰블 영역에 기록된 제3 동기 데이터 또는 제3 및 제2 동기 데이터들을 이용하여, A/V 데이터를 암호화한 후, 그 암호화된 A/V 데이터를 상기 클러스터 영역에 기록 저장하게 된다.As described above, encrypted A / V data for preventing illegal copy is recorded in the cluster area of the BD-ROM 200 in which synchronization data that is not matched with the synchronization data in the BD-RW 100 is recorded. For example, as shown in FIG. 6, in the encryption recording system 300 for recording encrypted data in the cluster area of the BD-ROM 200, the first recorded data in the preamble area may be stored. After encrypting the A / V data using the third sync data or the third and second sync data, the encrypted A / V data is recorded and stored in the cluster area.

참고로, 상기 암호화 기록 시스템(300)에서는, 엔크립션(Encryption) 방식, 인터리빙(Interleaving) 방식 또는 스크램블(Scramble) 방식 등과 같은 통상적인 암호화 처리 방식 중 임의의 한 암호화 방식을 선택 사용할 수 있다.For reference, the encryption recording system 300 may select and use any one of conventional encryption processing methods, such as an encryption method, an interleaving method, a scramble method, and the like.

따라서, 상기와 같이 BD-ROM에 기록되는 데이터를, BD-RW에서와 같이 불연속 적으로 기록함으로써, BD-ROM 플레이어와 같은 광디스크 장치에서, BD-ROM는 물론, BD-RW와의 재생 호환성을 유지시킬 수 있도록 함과 아울러, 상기와 같은 암호화 기록 동작에 의해 BD-ROM이, 무단으로 불법 복제되는 것을 방지시키게 되는 데, 이에 대해 상세히 설명하면 다음과 같다.Therefore, by recording the data recorded on the BD-ROM discontinuously as in the BD-RW as described above, in an optical disc device such as a BD-ROM player, playback compatibility with the BD-ROM as well as the BD-RW can be maintained. In addition, the BD-ROM can be prevented from being illegally copied by the above-described encryption recording operation, which will be described in detail as follows.

도 7은, 본 발명의 실시예에 따른 암호화 데이터 재생방법이 적용되는 광디스크 장치에 대한 구성을 도시한 것으로, 상기 광디스크 장치, 예를 들어 BD-ROM 플레이어에는, 상기 BD-ROM(1)에 불연속적으로 기록됨과 아울러 암호화 처리된 A/V 데이터를 독출하기 위한 광픽업(2)과 데이터 독출부(3), 그리고 상기 독출되는 암호화 처리된 A/V 데이터를, 상기 BD-ROM(1)에 기록된 동기 데이터를 이용하여 비암호화된 A/V 데이터로 해독한 후, 원래의 비디오 및 오디오 신호로 디코딩 및 재생신호 처리하기 위한 재생신호 처리부(4)가 포함 구성된다.Fig. 7 shows a configuration of an optical disk device to which the encrypted data reproduction method according to the embodiment of the present invention is applied. The optical disk device, e.g., a BD-ROM player, does not correspond to the BD-ROM 1; The optical pickup 2, the data reader 3, and the encrypted encrypted A / V data for continuously reading and reading the encrypted A / V data are stored in the BD-ROM 1. A reproduction signal processing section 4 for decoding and reproducing the original video and audio signals after decoding the non-encrypted A / V data using the recorded synchronization data is included.

또한, 상기 재생신호 처리동작을 제어하기 위한 제어부(5)와, 상기 재생신호 처리동작에 필요한 데이터를 임시 저장하기 위한 버퍼부(6) 등이 포함 구성될 수 있다.In addition, a control unit 5 for controlling the reproduction signal processing operation, and a buffer unit 6 for temporarily storing data necessary for the reproduction signal processing operation may be included.

한편, 도 8은 본 발명의 실시예에 따른 암호화 데이터 재생방법에 대한 동작 흐름도를 도시한 것으로, 상기 제어부(5)에서는, 도 4 내지 도 6을 참조로 전술한 바와 같이, 암호화 처리된 A/V 데이터가 불연속적으로 기록 저장된 BD-ROM(1)이 삽입 안착되는 경우(S10), 상기 BD-ROM(1)의 리드인 영역을 탐색 확인하여, 그 영역에 기록된 관리정보, 즉 BD-ROM(1)에 기록된 데이터를 재생 제어하기 위한 관리정보를 독출하여, 내부 메모리(미도시)에 저장하게 된다(S11).8 is a flowchart illustrating an encrypted data reproducing method according to an exemplary embodiment of the present invention. In the controller 5, as described above with reference to FIGS. 4 to 6, the encrypted A / When the BD-ROM 1 in which V data is recorded discontinuously is inserted and seated (S10), the lead-in area of the BD-ROM 1 is searched and checked, and the management information recorded in that area, that is, BD- Management information for reproducing and controlling the data recorded in the ROM 1 is read out and stored in an internal memory (not shown) (S11).

이후, 상기 제어부(5)에서는, 사용자로부터 재생 동작이 요청되는경우(S12), 상기 광픽업(2)을 A/V 데이터와 같은 실시간 데이터의 기록시작 지점으로 이동시켜, 그 지점에 기록된 데이터를 독출 재생하는 일련의 재생동작을 수행시키게 된다(S13).Thereafter, when the reproduction operation is requested from the user (S12), the control unit 5 moves the optical pickup 2 to a recording start point of real-time data such as A / V data, and records the data recorded there. A series of reproducing operations for reading out and reproducing is performed (S13).

한편, 상기와 같은 재생동작 도중, 도 4를 참조로 전술한 바 있는 기록 유니트 블록(RUB) 내의 런인(Run-in) 영역을 재생하게 되는 경우, 그 런인 영역 내의 프리앰블(PrA) 영역에 포함 기록된 동기 데이터, 즉, BD-RW와는 다르게 기록된 제3 동기 데이터(Sync_3) 및/또는 제2 동기 데이터(Sync_2)를 검색 독출하게 된다(S15).On the other hand, when the run-in area in the recording unit block RUB described above with reference to FIG. 4 is reproduced during the above reproducing operation, recording is included in the preamble PrA area in the run-in area. The read synchronization data, that is, the third synchronization data Sync_3 and / or the second synchronization data Sync_2 recorded differently from the BD-RW, is searched and read (S15).

이후, 상기 독출된 동기 데이터를 이용하여, 그 후단에 기록된 실시간 데이터, 즉 상기 런인 영역에 연속 할당되는 클러스터(Cluster) 영역에 암호화되어 기록된 A/V 데이터를, 원래의 비암호화된 A/V 데이터로 해독 처리하게 되는 데(S16), 상기 해독 처리동작은, 암호화 처리동작에 사용된 엔크립션(Encryption) 방식, 인터리빙(Interleaving) 방식 또는 스크램블(Scramble) 방식 등에 대응되는 해독 처리방식을 사용하게 된다.Then, using the read-out synchronization data, real-time data recorded at the rear end thereof, that is, A / V data encrypted and recorded in a cluster area continuously allocated to the run-in area, is originally unencrypted A /. Decryption processing to the V data (S16), the decryption processing operation, the decryption processing method corresponding to the encryption (Encryption) method, interleaving (Scramble) method, etc. used in the encryption processing operation Will be used.

그리고, 상기 제어부(5)에서는, 상기 재생신호 처리부(4)를 동작 제어하여, 상기와 같이 비암호화 처리된 원래의 A/V 데이터를 MPEG 디코딩 동작을 통해 비디오 및 오디오 신호로 재생 출력하는 일련의 재생신호 처리동작이 수행되도록 하고(S18), 사용자의 키 입력에 따라 재생 종료가 요청되는 경우(S19), 상기 재생 동작을 중지시키게 된다.The control unit 5 controls the reproduction signal processing unit 4 so as to reproduce and output the original non-encrypted A / V data as video and audio signals through MPEG decoding. The reproduction signal processing operation is performed (S18), and when the reproduction termination is requested according to the user's key input (S19), the reproduction operation is stopped.

따라서, 상기와 같이 BD-ROM의 기록 유니트 블록 내의 런인 영역에 포함 기록되는 동기 데이터를 이용하여, 암호화된 데이터를 해독 및 재생신호 처리함으로써, BD-RW 레코더와 같은 광디스크 장치를 구비한 사용자가, 상기 BD-ROM에 기록된 데이터를 BD-RW에 불법 복제하여 무단으로 재생하게 되는 것을 방지시킬 수 있게 된다.Therefore, a user having an optical disc device such as a BD-RW recorder by decrypting and reproducing the encrypted data using the synchronous data recorded in the run-in area in the recording unit block of the BD-ROM as described above, The data recorded on the BD-ROM can be illegally copied to the BD-RW to prevent unauthorized reproduction.

참고로, 상기와 같이 동기 데이터를 이용한 암호화 및 해독 처리방법은, 상기 BD-RW 등과 같은 재기록 가능 광디스크에도 확대 적용될 수 있다.For reference, the encryption and decryption processing method using the synchronous data as described above may be extended to a rewritable optical disc such as the BD-RW.

이상, 전술한 본 발명의 바람직한 실시예는, 예시의 목적을 위해 개시된 것으로, 상기 BD-ROM 이외의 또다른 고밀도 재생 전용 광디스크에 적용할 수 있으며, 당업자라면 이하 첨부된 특허청구범위에 개시된 본 발명의 기술적 사상과 그 기술적 범위 내에서, 다양한 다른 실시예들을 개량, 변경, 대체 또는 부가 등이 가능할 것이다.The above-described preferred embodiments of the present invention are disclosed for the purpose of illustration, and can be applied to another high-density reproduction-only optical disc other than the BD-ROM, and those skilled in the art can disclose the present invention disclosed in the appended claims. Within the spirit and scope of the present invention, various other embodiments may be improved, changed, replaced or added.

상기와 같이 구성 및 이루어지는 본 발명에 따른 고밀도 재생 전용 광디스크와, 그 광디스크의 암호화 기록 및 재생방법은, BD-ROM 등과 같은 고밀도 재생 전용 광디스크에 기록되는 데이터를, BD-RW 등과 같은 재기록 가능 광디스크에서와 같이, 불연속적인 기록 포맷으로 기록함과 아울러, 고밀도 재생 전용 광디스크에 포함 기록되는 동기 데이터를 이용하여, A/V 데이터를 암호화 기록함으로써, BD-ROM 플레이어 등과 같은 광디스크 장치에서, BD-RW 등과 같은 재기록 가능 광디스크와의 재생 호환성을 유지시킬 수 있도록 함과 아울러, BD-RW 레코더 등과 같은 광디스크 장치를 구비한 사용자가, 상기 고밀도 재생 전용 광디스크에 기록된 데이터를 불법 복제하여 무단으로 재생하게 되는 것을 사전에 방지시킬 수 있게 되는 매우 유용한 발명인 것이다.The high-density reproduction-only optical disc and the method for encrypting and reproducing the optical disc according to the present invention constituted and constructed as described above are used to store data recorded on a high-density reproduction-only optical disc such as a BD-ROM on a rewritable optical disc such as a BD-RW. By recording in a discontinuous recording format and encrypting and recording A / V data using synchronous data recorded in an optical disc for high-density reproduction, an optical disc device such as a BD-ROM player, such as a BD-RW or the like, It is possible to maintain playback compatibility with a rewritable optical disc, and to allow a user having an optical disc device such as a BD-RW recorder to illegally copy and record data recorded on the high-density reproduction-only optical disc for unauthorized reproduction. It is a very useful invention that can be prevented.

Claims (10)

고밀도 재생 전용 광디스크에 있어서,In the high-density reproduction-only optical disc, 동영상의 비디오 데이터 및 오디오 데이터가 기록되는 데이터 기록영역에, 상기 비디오 및 오디오 데이터가 불연속적인 기록 포맷으로 기록 저장됨과 아울러, 상기 비디오 및 오디오 데이터가 암호화되어 기록 저장되어 있는 것을 특징으로 하는 고밀도 재생 전용 광디스크.High-density playback only characterized in that the video and audio data are recorded and stored in a discontinuous recording format, and the video and audio data are encrypted and stored in a data recording area in which video data and audio data of a moving picture are recorded. Optical disc. 제 1항에 있어서,The method of claim 1, 상기 비디오 및 오디오 데이터는, 상기 데이터 기록영역에 포함 기록된 동기 데이터를 기반으로 암호화되어 기록 저장되는 것을 특징으로 하는 고밀도 재생 전용 광디스크.And the video and audio data are encrypted and stored based on the synchronized data recorded in the data recording area. 제 2항에 있어서,The method of claim 2, 상기 동기 데이터는, 재기록 가능한 고밀도 광디스크에 포함 기록되는 동기 데이터와는 서로 다르게 기록되는 것을 특징으로 하는 고밀도 재생 전용 광디스크.And the synchronous data is recorded differently from the synchronous data recorded on the rewritable high density optical disc. 제 3항에 있어서,The method of claim 3, 상기 재기록 가능한 고밀도 광디스크는, 재기록 가능 블루레이 디스크(BD-RW)이고, 상기 고밀도 재생 전용 광디스크는, 재생 전용 불루레이 디스크(BD-ROM)인 것을 특징으로 하는 고밀도 재생 전용 광디스크.The rewritable high density optical disc is a rewritable Blu-ray disc (BD-RW), and the high density reproduction only optical disc is a reproduction only Blu-ray disc (BD-ROM). 고밀도 재생 전용 광디스크에 포함 기록된 동기 데이터를 기반으로, 동영상의 비디오 데이터 및 오디오 데이터를 암호화하는 1단계; 및Encrypting video data and audio data of a moving picture based on synchronous data recorded on a high-density reproduction-only optical disc; And 상기 암호화된 비디오 및 오디오 데이터를 불연속적인 기록 포맷으로 기록 저장하는 2단계를 포함하여 이루어지는 것을 특징으로 하는 고밀도 재생 전용 광디스크의 암호화 기록방법.And recording and storing the encrypted video and audio data in a discontinuous recording format. 제 5항에 있어서,The method of claim 5, 상기 1단계는, 상기 동영상의 비디오 데이터 및 오디오 데이터가 기록되기 직전의 기록 영역에 기록된 동기 데이터를 기반으로 암호화하는 것을 특징으로 하는 고밀도 재생 전용 광디스크의 암호화 기록방법.And said first step is to encrypt based on the synchronous data recorded in the recording area immediately before the video data and audio data of said moving picture are recorded. 제 5항에 있어서,The method of claim 5, 상기 2단계는, 상기 암호화된 비디오 및 오디오 데이터를, 재기록 가능한 고밀도 광디스크에 대응되는 불연속적인 기록 포맷으로 기록 저장하는 것을 특징으로 하는 고밀도 재생 전용 광디스크의 암호화 기록방법.And said second step records and stores said encrypted video and audio data in a discontinuous recording format corresponding to a rewritable high density optical disc. 고밀도 재생 전용 광디스크에 포함 기록된 동기 데이터를 검색 독출하는 1단계;Step 1 of searching and reading the sync data recorded on the high-density reproduction-only optical disc; 상기 독출된 동기 데이터를 기반으로, 동영상의 비디오 데이터 및 오디오 데이터를 해독하는 2단계; 및Decoding video data and audio data of a moving picture based on the read synchronization data; And 상기 해독된 비디오 및 오디오 데이터를 원래의 비디오 및 오디오 신호로 디코딩하여 재생신호 처리하는 3단계를 포함하여 이루어지는 것을 특징으로 하는 고밀도 재생 전용 광디스크의 암호화 데이터 재생방법.And decoding the decoded video and audio data into original video and audio signals and processing a reproduction signal. 제 8항에 있어서,The method of claim 8, 상기 1단계는, 상기 동영상의 비디오 데이터 및 오디오 데이터가 기록되기 직전의 기록 영역에 기록된 동기 데이터를 검색 독출하는 것을 특징으로 하는 고밀도 재생 전용 광디스크의 암호화 데이터 재생방법.The first step is a method for reproducing encrypted data of an optical disc dedicated to high-density reproduction, characterized in that the synchronization data recorded in the recording area immediately before the video data and audio data of the moving picture is recorded is read out. 제 8항에 있어서,The method of claim 8, 상기 2단계는, 상기 동기 데이터가 기록된 기록 영역 직후에 기록된 비디오 및 오디오 데이터를, 상기 독출된 동기 데이터를 기반으로 하여, 사전에 설정된 암호화 해독 방식으로 해독하는 것을 특징으로 하는 고밀도 재생 전용 광디스크의 암호화 데이터 재생방법.In the second step, the video and audio data recorded immediately after the recording area in which the synchronous data is recorded are decoded by a predetermined encryption decryption method based on the read synchronous data. Encrypted data playback method.
KR1020020031746A 2002-01-10 2002-06-05 High density read only optical disc, apparatus and method for recording and reproducing an encoded data on them KR100896058B1 (en)

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JP2007213431A JP4805884B2 (en) 2002-06-05 2007-08-20 Computer-readable reproduction-only storage medium, reproduction method and reproduction apparatus for data recorded on reproduction-only recording medium
US11/907,747 US7542405B2 (en) 2002-06-05 2007-10-17 High-density optical disc, method for recording and reproducing encrypted data thereon
US12/385,913 US8014248B2 (en) 2002-06-05 2009-04-23 Recording medium with a linking area including dummy data thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US12/385,947 US8351315B2 (en) 2002-06-05 2009-04-24 Recording medium with a linking area including a synch pattern thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US12/453,914 US20090303863A1 (en) 2002-06-05 2009-05-27 Recording medium with a linking area thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US12/458,258 US7872960B2 (en) 2002-06-05 2009-07-07 Recording medium with a linking area thereon and apparatus and methods for forming, recording, and reproducing the recording medium

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