KR910011005A - Video Scrambling System by Spectral Rotation - Google Patents

Video Scrambling System by Spectral Rotation Download PDF

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Publication number
KR910011005A
KR910011005A KR1019890018563A KR890018563A KR910011005A KR 910011005 A KR910011005 A KR 910011005A KR 1019890018563 A KR1019890018563 A KR 1019890018563A KR 890018563 A KR890018563 A KR 890018563A KR 910011005 A KR910011005 A KR 910011005A
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KR
South Korea
Prior art keywords
output
spectrum
low
filter
pass filter
Prior art date
Application number
KR1019890018563A
Other languages
Korean (ko)
Other versions
KR950003028B1 (en
Inventor
서정식
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019890018563A priority Critical patent/KR950003028B1/en
Publication of KR910011005A publication Critical patent/KR910011005A/en
Application granted granted Critical
Publication of KR950003028B1 publication Critical patent/KR950003028B1/en

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Classifications

    • 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
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Television Systems (AREA)

Abstract

내용 없음No content

Description

스펙트럼 로테이션에 의한 비디오 스크램블링 시스템Video Scrambling System by Spectral Rotation

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명 스펙트럼 로테이션에 의한 비디오 스크램블링 시스템의 구성도.3 is a block diagram of a video scrambling system using spectral rotation according to the present invention.

제4도의 (가) 내지 (라)는 본 발명을 설명하기 위한 제3도 각부의 출력 스펙트럼도.4A to 4D are output spectral diagrams of respective parts of FIG. 3 for explaining the present invention.

Claims (1)

복합영상신호(CVS)를 입력하여 버퍼링하는 버퍼(11)와, 상기 버퍼(11)의 출력신호에서 필요로 하는 대역내의 신호만 통과시키는 저역여파기(12)와, 상기 저역여파기(12)의 출력영상 스펙트럼중까지 컬오프하여 하나의 세그먼트로 하는 저역여파기(13)와 상기 저역여파기(12)의 출력영상 스펙트럼을까지 여과하여 또다른 세그먼트로 하는 대역여파기(14)와, 상기 저역여파기(13)의출력영상 스펙트럼을 fsc~6MHz까지 시프팅시키는 평형변조기(15)와, 상기 대역여파기(14)의 출력영상 스펙트럼을까지 시프팅시키는 평형변조기(16)와, 상기 평형변조기(25)의 출력 스펙트럼을 fsc~6MHz까지 대역여파하는 대여기여파기(17)와, 상기 평형변조기(16)의 출력스펙트럼을까지 컬오프하는 저역여파기(18)와, 상기 대역여파기(17) 및 저역여파기(18)의 출력 스펙트럼을 가산하여 스크램블된 비디오 신호를 출력하는 연산증폭기(OP11)로 구성된 것을 특징으로하는 스펙트럼 로테이션에 의한 비디오 스크램블링 시스템.A buffer 11 for inputting and buffering a composite video signal CVS, a low pass filter 12 for passing only signals in a band required by the output signal of the buffer 11, and an output of the low pass filter 12 In the video spectrum The output image spectrum of the low filter (13) and the low filter (12) to be a segment by culling up to A bandpass filter 14 for filtering to another segment, a balance modulator 15 for shifting the output video spectrum of the low pass filter 13 to f sc ˜6 MHz, and an output video of the bandpass filter 14 Spectrum A balance modulator 16 for shifting to, a rental filter 17 for band filtering the output spectrum of the balance modulator 25 to f sc ˜6 MHz, and an output spectrum of the balance modulator 16. The spectral rotation, characterized in that it consists of a low-pass filter 18 to be curled up to, and an operational amplifier (OP11) for outputting a scrambled video signal by adding the output spectrum of the band-pass filter 17 and the low-pass filter 18 Video scrambling system. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890018563A 1989-12-14 1989-12-14 Video scrambling system by spectrum rotation KR950003028B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890018563A KR950003028B1 (en) 1989-12-14 1989-12-14 Video scrambling system by spectrum rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890018563A KR950003028B1 (en) 1989-12-14 1989-12-14 Video scrambling system by spectrum rotation

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
KR2019890017300 Division 1989-11-22

Publications (2)

Publication Number Publication Date
KR910011005A true KR910011005A (en) 1991-06-29
KR950003028B1 KR950003028B1 (en) 1995-03-29

Family

ID=19292897

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890018563A KR950003028B1 (en) 1989-12-14 1989-12-14 Video scrambling system by spectrum rotation

Country Status (1)

Country Link
KR (1) KR950003028B1 (en)

Also Published As

Publication number Publication date
KR950003028B1 (en) 1995-03-29

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