KR950007547A - Scrambling / Descrambling Circuit of Broadcast Signal - Google Patents

Scrambling / Descrambling Circuit of Broadcast Signal Download PDF

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Publication number
KR950007547A
KR950007547A KR1019930016332A KR930016332A KR950007547A KR 950007547 A KR950007547 A KR 950007547A KR 1019930016332 A KR1019930016332 A KR 1019930016332A KR 930016332 A KR930016332 A KR 930016332A KR 950007547 A KR950007547 A KR 950007547A
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KR
South Korea
Prior art keywords
random number
signal
broadcast signal
broadcast
data
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KR1019930016332A
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Korean (ko)
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KR960010499B1 (en
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서진우
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배순훈
대우전자 주식회사
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Publication of KR950007547A publication Critical patent/KR950007547A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

본 발명은 방송신호의 스크램블링/디스크램블링 회로에 관한 것으로, 스크램블링 회로는 소정 비트수의 디지털 신호로 변환된 방송신호를 랜덤하게 변환하기 위한 랜덤수를 발생하는 제1랜덤수 발생기(10)와, 상기 제1랜덤수 발생기(10)에서 출력되는 랜덤수신호를 기초로 상기 방송신호를 스크램블링하기 위해 방송신호의 코딩신호를 디멀티플렉싱하는 제1디멀티플렉서(12) 및, 상기 제1디멀티플렉서(12)를 통해 출력되는 방송코딩신호에 따라 방송신호를 스크램블링하는 제1데이터변환부(14)를 구비하여 구성되고, 디스크램블링 회로는 전송되는 랜덤수 신호를 키데이터로 사용하여 방송신호의 디스크램블링을 위한 랜덤수신호를 발생하는 제2랜덤수 발생기(16)와, 상기 제2랜덤수 발생기(16)에서 출력되는 랜덤수신호를 기초로 스크램블링된 방송신호의 비트를 디멀티플렉싱하는 제2디멀티플렉서(18), 송신측의 제1데이터변환부(14)에서 전송되는 스크램블된 데이터신호를 수신하여 상기 제2랜덤수 발생기(16)로 부터의 복원신호를 기초로 하여 디스크램블링하는 제2데이터변환부(20)를 구비하여 구성된 것이다.The present invention relates to a scrambling / descrambling circuit of a broadcast signal, wherein the scrambling circuit comprises: a first random number generator 10 generating a random number for randomly converting a broadcast signal converted into a digital signal having a predetermined number of bits; The first demultiplexer 12 demultiplexes the coded signal of the broadcast signal to scramble the broadcast signal based on the random number signal output from the first random number generator 10, and through the first demultiplexer 12. And a first data converter 14 for scrambling the broadcast signal according to the output broadcast coding signal, wherein the descrambling circuit uses the random number signal transmitted as key data to randomly descramble the broadcast signal. The scrambled broadcast signal is scrambled based on a random number signal output from the second random number generator 16 and the second random number generator 16. The second demultiplexer 18 demultiplexes the data, and receives the scrambled data signal transmitted from the first data converter 14 on the transmitting side, based on the reconstruction signal from the second random number generator 16. And a second data converter 20 for descrambling.

Description

방송신호의 스크램블링/디스크램블링 회로Scrambling / Descrambling Circuit of Broadcast Signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 더블컷로테이션에 의해 스크램블링되는 데이터버스트를 설명하는 도면.1 is a diagram illustrating a data burst scrambled by a conventional double cut rotation.

제2도는 제1도에 의해 스크램블링된 데이터버스트를 디스크램블링하는 디스크램블러의 개략도.FIG. 2 is a schematic diagram of a descrambler for descrambling databurst scrambled by FIG.

제3도는 본 발명에 따른 방송신호의 스크램블링/디스크램블링 회로의 구성도이다.3 is a configuration diagram of a scrambling / descrambling circuit of a broadcast signal according to the present invention.

Claims (6)

소정 비트수의 디지털신호로 변환된 방송신호를 랜덤하게 변환하기 위한 랜덤수를 발생하는 제1랜덤수 발생기(10)와, 상기 제1랜덤수 발생기(10)에서 출력되는 랜덤수신호를 기초로 상기 방송신호를 스크램블링하기 위해 방송신호의 코딩신호를 디멀티플렉싱하는 제1디멀티플렉서(12) 및, 상기 제1디멀티플렉서(12)를 통해 출력되는 방송코딩신호에 따라 방송신호를 스크램블링하는 제1데이터변환부(41)를 구비하여 구성된 것을 특징으로 하는 방송신호의 디스크램블링 회로.The first random number generator 10 generating a random number for randomly converting a broadcast signal converted into a digital signal having a predetermined number of bits, and the random number signal output from the first random number generator 10. A first demultiplexer 12 for demultiplexing the coding signal of the broadcast signal to scramble the broadcast signal, and a first data converter for scrambling the broadcast signal according to the broadcast coding signal output through the first demultiplexer 12 ( 41). A descrambling circuit for broadcast signals, characterized in that it comprises a). 제1항에 있어서, 상기 제1랜덤수 발생기(10)는 방송신호를 랜덤하게 스크램블링하기 위해 소정비트수의 랜덤수신호를 발생하게 된 것을 특징으로 하는 방송신호의 스크램블링회로.2. The scrambling circuit of claim 1, wherein the first random number generator (10) generates a random number signal of a predetermined number of bits to randomly scramble the broadcast signal. 제1항에 있어서, 상기 제1데이터변환부(14)는 전송될 방송신호데이터에 대응하는 수로 설치되어 상기 제1디멀티플렉서(12)를 통해 인가되는 랜덤수신호에 대응하는 방송신호데이터를 랜덤하게 반전시켜 스크램블링하기 위한 익스크루시브 오아게이트를 갖추어 구성된 것을 특징으로 하는 방송신호의 디스크램블링 회로.The first data converter 14 is provided with a number corresponding to the broadcast signal data to be transmitted, and randomly inverts the broadcast signal data corresponding to the random number signal applied through the first demultiplexer 12. A descrambling circuit for a broadcast signal, characterized by comprising an exclusive oragate for scrambling. 제1항 및 3항에 있어서, 상기 제1랜덤수 발생기(10)는 상기 제1데이터변환부(14)에서 반전되는 해당 비트에 대한 랜덤수신호를 수신측에 전송하도록 된 것을 특징으로 하는 방송신호의 스크램블링회로.The broadcast signal according to claim 1 or 3, wherein the first random number generator 10 transmits a random number signal for the corresponding bit inverted by the first data converter 14 to a receiver. Scrambling circuit. 송신측으로부터 전송되는 랜덤수신호를 키데이터로 사용하여 방송신호의 디스크램블링을 위한 랜덤수신호를 발생하는 제2랜덤수 발생기(16)와, 상기 제2랜덤수 발생기(16)에서 출력되는 랜덤수신호를 기초로 스크램블링된 방송신호의 비트를 디멀티플렉싱하는 제2디멀티플렉서(18), 송신측의 제1데이터변환부(14)에서 전송되는 스크램블된 데이터신호를 수신하여 상기 제2랜덤수 발생기(16)로 부터의 복원신호를 기초로 하여 디스크램블링 하는 제2데이터변환부(20)를 구비하여 구성된 것을 특징으로 하는 방송신호의 디스크램블링 회로.A second random number generator 16 for generating a random number signal for descrambling a broadcast signal using the random number signal transmitted from the transmitting side as key data, and a random number signal output from the second random number generator 16; The second demultiplexer 18 demultiplexes the bits of the scrambled broadcast signal based on the received signal, and receives the scrambled data signal transmitted from the first data converter 14 on the transmitting side to the second random number generator 16. And a second data converter (20) for descrambling on the basis of the recovery signal from the broadcast signal. 제5항에 있어서, 상기 제2데이터변환부(20)는 수신된 방송신호데이터비트에 상당하는 수의 익스크루시브 오아게이트로 구성된 것을 특징으로 하는 방송신호의 디스크램블링회로.6. The descrambling circuit of a broadcast signal according to claim 5, wherein said second data converter (20) is comprised of a number of exclusive orifices corresponding to the received broadcast signal data bits. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930016332A 1993-08-23 1993-08-23 Scrambling/descrambling circuit KR960010499B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930016332A KR960010499B1 (en) 1993-08-23 1993-08-23 Scrambling/descrambling circuit

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Application Number Priority Date Filing Date Title
KR1019930016332A KR960010499B1 (en) 1993-08-23 1993-08-23 Scrambling/descrambling circuit

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KR950007547A true KR950007547A (en) 1995-03-21
KR960010499B1 KR960010499B1 (en) 1996-08-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100802894B1 (en) * 2000-02-17 2008-02-13 마이크로소프트 코포레이션 System and method for protecting data streams in hardware components

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100802894B1 (en) * 2000-02-17 2008-02-13 마이크로소프트 코포레이션 System and method for protecting data streams in hardware components
KR100853608B1 (en) * 2000-02-17 2008-08-22 마이크로소프트 코포레이션 System and method for protecting data streams in hardware components

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