KR960019110A - 디지탈 영상 시스템의 복사 방지 방법 및 장치 - Google Patents

디지탈 영상 시스템의 복사 방지 방법 및 장치 Download PDF

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KR960019110A
KR960019110A KR1019940031373A KR19940031373A KR960019110A KR 960019110 A KR960019110 A KR 960019110A KR 1019940031373 A KR1019940031373 A KR 1019940031373A KR 19940031373 A KR19940031373 A KR 19940031373A KR 960019110 A KR960019110 A KR 960019110A
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South Korea
Prior art keywords
copy protection
key
bit stream
detecting
information
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KR1019940031373A
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KR0152788B1 (ko
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박태준
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이헌조
엘지전자 주식회사
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19399149&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR960019110(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 이헌조, 엘지전자 주식회사 filed Critical 이헌조
Priority to KR1019940031373A priority Critical patent/KR0152788B1/ko
Priority to US08/562,042 priority patent/US5761302A/en
Priority to CNA2006100071322A priority patent/CN1822166A/zh
Priority to CNA2006100071341A priority patent/CN1822168A/zh
Priority to CNB031073360A priority patent/CN1268126C/zh
Priority to CN200410056681XA priority patent/CN1567993B/zh
Priority to CN200610055097.1A priority patent/CN1822667B/zh
Priority to CN200610055098.6A priority patent/CN1822668B/zh
Priority to CN95120356A priority patent/CN1123226C/zh
Priority to CNA2006100071337A priority patent/CN1822167A/zh
Priority to CNB2003101179608A priority patent/CN1268127C/zh
Priority to CNB951203541A priority patent/CN1145576C/zh
Priority to CNA200510129704XA priority patent/CN1801919A/zh
Priority to DE69522424T priority patent/DE69522424D1/de
Priority to EP95308482A priority patent/EP0717564B1/en
Priority to JP7307915A priority patent/JP2824231B2/ja
Priority to JP7308005A priority patent/JP2898591B2/ja
Publication of KR960019110A publication Critical patent/KR960019110A/ko
Priority to US09/053,288 priority patent/US6028932A/en
Application granted granted Critical
Publication of KR0152788B1 publication Critical patent/KR0152788B1/ko
Priority to US09/497,465 priority patent/US6347144B1/en
Priority to US10/737,672 priority patent/USRE39319E1/en
Priority to US10/737,671 priority patent/USRE42950E1/en
Priority to US10/909,248 priority patent/USRE42921E1/en
Priority to US10/981,797 priority patent/USRE42951E1/en
Priority to HK04108794A priority patent/HK1066131A1/xx
Priority to HK04109762A priority patent/HK1068000A1/xx
Priority to US11/040,606 priority patent/USRE41074E1/en
Priority to US11/040,607 priority patent/USRE42922E1/en
Priority to HK06112983.8A priority patent/HK1092626A1/xx
Priority to HK06112984.7A priority patent/HK1092627A1/xx
Priority to HK05101189.4A priority patent/HK1069049A1/xx

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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
    • G11B20/10—Digital recording or reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91328—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
    • 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
    • H04N9/804—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
    • H04N9/806—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 with processing of the sound signal
    • H04N9/8063—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 with processing of the sound signal using time division multiplex of the PCM audio and PCM video signals
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Storage Device Security (AREA)
  • Electric Vacuum Cleaner (AREA)

Abstract

본 발명은 디지탈 브이싸알의 복사 방지 방법 및 장치에 관한 것으로, 종래의 아날로그 방식은 제조 회사에 따라 일부 브이씨알에서 복사 방지 기능이 작동하지 않거나 원본 테이프가 제대로 재생되지 않는 문제점이 있고, 종래의 디지탈 방식은 퍼브릭-키 암호화 방식을 적용하였을 경우 연산량이 많아 고속 처리에 부적합하고 또한, DSM과 같은 프로그램에 대해 보호할 수 없는 문제점이 있다. 이러한 문제점을 해결하기 위하여 본 발명은 테이프를 복사할 때 암호화된 자신만의 키 정보를 전송하여 녹화시키므로써 암호화된 해당 키 정보를 내장한 브이씨알에서만 복사 테이프를 재생 가능하도록 창안한 것으로, 본 발명은 테이프를 복사할 때 자신의 키정보를 비트 스트림과 함께 녹화시키므로써 해당 키 정보를 가진 브이씨알에서만 테이프를 정상적으로 재생하도록 하여 테이프의 무단 복제를 방지할 수 있고, 또한, 퍼브릭-키 암호화 방식을 적용한 키 정보를 전송하므로써 복사 방지 기능의 해제가 불가능하게 하므로써 복사 방지 기능의 신뢰성을 향상시킬 수 있는 효과가 있다.

Description

디지탈 영상 시스템의 복사 방지 방법 및 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제4도는 본 발명에서 시스템간 접속도,
제5도는 본 발명을 적용한 브이씨알의 블럭도,
제6도는 제5도에서 복사 방지 정보 검출부의 블럭도.

Claims (15)

  1. 비트 스트림에 키 필드를 부가하는 제1단계와, 제1단계에서 키 필드가 부가된 비트 스트림을 복호하는 제2단계와, 제2단계에서 복호된 비트 스트림의 키 필드를 검출하여 복사 방지 정보를 검출하는 제3단계와, 제3단계에서 검출된 정보에 딸 부호화하여 녹화하는 제4단계로 이루어진 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  2. 제1항에 있어서, 비트 스트림의 선두에 패킷 시작 코드를 부가한 후 키 필드를 부가하는 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  3. 제1항에 있어서, 키 필드를 검출하여 필요에 따라 수정하는 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  4. 제1항에 있어서, 복사 방지 정보는 Additional Copy Info. 필드에 기록 하는 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  5. 제4하에 있어서, Additional Copy Info. 필드의 가변적인 위치를 보상하는 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  6. 제1항에 있어서, 비트 스트림을 블럭 단위로 부호화하는 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  7. 제1항 또는 제6항에 있어서, 비트 스트림을 Additional Copy Info. 필드이후부터 부호화하는 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 방법.
  8. 재생된 비트 스트림에 키 정보를 부가하여 복호화하는 재생 처리 블럭과, 이 재생 처리 블럭에서 전송된 비트 스트림의 키 정보를 검색하여 복사 방지 정보를 추출하고 이 추출된 복사 방지 정보에 따라 비트 스트림을 부호화하여 녹화하는 녹화 처리 블럭으로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  9. 제8항에 있어서, 재생 처리 블럭은 녹화 데이타를 재생하는 재생 수단과, 이 재생 수단의 비트 스트림에 키 정보를 부가하는 키 삽입 수단과, 이 키 삽입 수단의 출력을 복호하여 기록측 브이씨알로 전송하는 복호화 수단으로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  10. 제8항에 있어서, 재생측 브이씨알 전송 비트 스트림에서 키 정보를 검출하는 키 검출 및 수정 수단과, 이 키 검출 및 수정 수단에서 검출한 키 정보를 검색하여 복사 방지 정보를 검출하는 복사 방지 정보 검출 수단과, 이 복사 방지 정보 검출 수단의 복사 방지 정보에 따라 비트 스트림을 부호화하는 부호화 수단과, 이 부호화 수단에서 부호화된 비트 스트림을 기록하는 기록 수단으로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  11. 제10항에 있어서, 복사 방지 정보 검출 수단은 키 검출 및 수정 수단의 병렬 데이타에서 PES헤더를 검출하는 PES헤더 검출단과, 이 PES 헤더 검출단의 헤더 검출 신호에 인에이블되어 Additional Copy Info. 필드를 검출하는 복사 방지 정보 검출단으로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  12. 제11항에 있어서, PES 헤더 검출단은 클럭(CLK)에 동기되어 키 검출 및 수정 수단의 병렬 데이타를 지연시키는 제1지연기와, 이 지연기의 입출력 데이타를 검색하여 패킷 시작 코드를 검출하는 패킷 시작 코드 검출기와, 이 패킷 시작 코드 검출기의 출력을 소정 시간 지연시키는 제2지연기와, 상기 제1지연기의 출력 데이타를 검색하여 스트림 인식 코드를 검출하는 스트림 인식 코드 검출기와, 이 스트림 인식 코드 검출기와 상기 제2지연기의 출력을 논리 조합하여 헤더 검출 신호(is-PES-header)를 출력하는 검출 신호 발생기로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  13. 제12항에 있어서, 제1, 제2지연기는 디플립플롭을 다단으로 직렬 접속하여 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  14. 제12항에 있어서, 검출 신호 발생기는 패킷 시작 코드 검출기의 패킷 시작 코드 검출 신호와 스트림 인식 코드 검출기의 스트림 인식 코드 검출 신호를 논리곱하는 앤드게이트와, 이 앤드게이트의 출력을 클럭(CLK)에 동기되어 상기 앤드게이트의 출력을 홀딩하는 플립플롭으로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
  15. 제11항에 있어서, 복사 방지 정보 검출단은 PES 헤더 검출단의 병렬 데이타를 홀딩시키는 플립플롭(21)과, 이 플립플롭(21)의 출력중 CR플래그에 인에이블되어 전압(Vcc)을 홀딩시키는 플립플롭(23)과, 상기 플립플롭(21)의 출력중 OC플래그에 인에이블되어 전압(Vcc)을 홀딩시키는 플립플롭(24)과, 상기 PES 헤더 검출단의 병렬 데이타를 점검하여 Additional Copy Info. 필드의 위치를 산출하는 정보 위치 검출기(25)과, 이 정보 위치 검출기(25)의 출력을 계수하는 카운터(26)와, 이 카운터(26)의 출력에 동기되어 상기 플립플롭(21)의 출력중 Additional Copy Info. 필드를 홀딩시키는 플립플롭(27)과, 상기 PES 헤더 검출부의 헤더 검출신호(is-PES-header)에 동기되어 상기 플립플롭(23)(24)(27)을 인에이블시키는 플립플롭(22)으로 구성한 것을 특징으로 하는 디지탈 영상 시스템의 복사 방지 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940031373A 1994-11-26 1994-11-26 디지탈 영상 시스템의 복사 방지 방법 및 장치 KR0152788B1 (ko)

Priority Applications (30)

Application Number Priority Date Filing Date Title
KR1019940031373A KR0152788B1 (ko) 1994-11-26 1994-11-26 디지탈 영상 시스템의 복사 방지 방법 및 장치
US08/562,042 US5761302A (en) 1994-11-26 1995-11-22 Copy prevention method and apparatus for digital video system
CNB031073360A CN1268126C (zh) 1994-11-26 1995-11-26 用于数字数据处理和记录系统的防复制方法和记录装置
CNA2006100071341A CN1822168A (zh) 1994-11-26 1995-11-26 用于数字数据处理和记录系统的防复制方法和防复制设备
CNA2006100071322A CN1822166A (zh) 1994-11-26 1995-11-26 用于数字数据处理和记录系统的防复制方法
CN200410056681XA CN1567993B (zh) 1994-11-26 1995-11-26 防复制方法和装置
CN200610055097.1A CN1822667B (zh) 1994-11-26 1995-11-26 防复制方法和装置
CN200610055098.6A CN1822668B (zh) 1994-11-26 1995-11-26 防复制方法和装置
CN95120356A CN1123226C (zh) 1994-11-26 1995-11-26 用于数字视频系统的防复制方法和装置
CNA2006100071337A CN1822167A (zh) 1994-11-26 1995-11-26 用于数字数据处理和记录系统的防复制方法和防复制设备
CNB2003101179608A CN1268127C (zh) 1994-11-26 1995-11-26 数字数据处理装置和防复制方法
CNB951203541A CN1145576C (zh) 1994-11-26 1995-11-26 用于真空吸尘器的电线缠绕器
CNA200510129704XA CN1801919A (zh) 1994-11-26 1995-11-26 数字数据处理装置、防复制方法和记录介质
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KR100779806B1 (ko) * 1996-09-05 2007-11-27 소니 가부시끼 가이샤 디지털 인터페이스를 구비한 디지털 기록 장치 및 그 저작권 보호 방법
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CN1822168A (zh) 2006-08-23
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USRE42950E1 (en) 2011-11-22
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USRE42951E1 (en) 2011-11-22
US5761302A (en) 1998-06-02
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