KR920005101A - Method and apparatus for analog audio scrambling by rotation - Google Patents

Method and apparatus for analog audio scrambling by rotation Download PDF

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Publication number
KR920005101A
KR920005101A KR1019900013124A KR900013124A KR920005101A KR 920005101 A KR920005101 A KR 920005101A KR 1019900013124 A KR1019900013124 A KR 1019900013124A KR 900013124 A KR900013124 A KR 900013124A KR 920005101 A KR920005101 A KR 920005101A
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South Korea
Prior art keywords
lpf
bpf
signal
wave
output
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KR1019900013124A
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Korean (ko)
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KR920009638B1 (en
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서정식
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이헌조
주식회사 금성사
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/02Analogue recording or reproducing

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

내용 없음.No content.

Description

로테이션에 의한 아나로그 오디오 스크램블링 방법 및 장치Method and apparatus for analog audio scrambling by rotation

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

제2도는 본 발명에 따른 장치구성 블록도.2 is a block diagram of a device configuration according to the present invention.

제3도는 제2도에서의 요부출력 파형도.3 is a diagram showing waveforms of main parts output in FIG. 2;

Claims (3)

합성 비데오 신호로부터 수평동기 신호를 분리하여 1/2분주한 후 중심주파수가 fH/2인 랜덤위상을 가진 사인파와 코사인파를 발생하고, 아나로그 비데오 신호의 스펙트럼을 fH/2 중심으로 2개의 부분으로 나눈후 각각 상기 사인파와 코사인파로 QAMF하고, QAM된 2개의 신호를 각각 밴드리미팅시켜 저주파수 부분과 고주파수 부분을 로테이션 시키고, 이들을 합하여 스크램블링 걸도록한 것을 특징으로 하는 로테이션에 의한 아나로그 오디오 스크램블링 방법.After separating the horizontal sync signal from the synthesized video signal and dividing the signal by 1/2, the sine wave and cosine wave having the random phase having the center frequency of fH / 2 are generated. And QAMF the sine wave and the cosine wave, respectively, and band-limit the two QAM signals to rotate the low frequency part and the high frequency part, and add and scramble them to rotate the analog audio scrambling method. 제1항에 있어서 LPF를 거쳐서 QAM된 신호는 BPF로 밴드리미팅 시킴으로써 저주파수 부분은 고주파수 부분으로 로테이션되고, BPF를 거쳐서 QAM된 신호는 LPF로 밴드리미팅시켜 고주파수 부분은 고주파수 부분으로 로테이션되도록한 것을 특징으로 하는 로테이션에 의한 아나로그 오디오 스크램블링 방법.According to claim 1, wherein the QAM signal through the LPF band-limiting to the BPF, the low frequency portion is rotated to the high frequency portion, and the signal QAM via BPF is band-limited to the LPF so that the high frequency portion is rotated to the high frequency portion Analog audio scrambling method by rotation. 합성 비데오 신호에서 수평동기 신호를 분리해내는 수평동기 신호 분리기(1)와, 상기 수평동기 신호분리기(1)에서 분리한 수평동기 신호를 1/2분주하여 fH/2의 구형파를 발생하는 카운터(2)와, 상기 카운터(2)의 출력을 입력받아 중심주파수가 fH/2의 인파를 발생하는 BPF(3)와, 상기 BPF(3)의 출력을 인가받아 랜덤위상을 가진 사인파를 출력하는 랜덤위상 발생기(4)와, 상기 랜덤위상 발생기(4)의 출력을 쉬프트시켜 코사인파를 발생시키는 위상 쉬프터(5)와, 아나로그 오디오 신호를 컷오프 주파수 fH로 밴드리미팅 시키는 LPF(6)와, 상기 LPF(6)의 출력을 2개의 부분으로 나누는 LPF(7) 및 BPF(8), 상기 LPF(7) 및 BPF(8)에서 나누어진 2개의 스펙트럼을 랜덤위상 발생기(4)와 위상쉬프터(5)에서 출력되는 사인파와 코사인파로 QAM하는 밸런스 모듈레이터(9)(10)와, 상기 밸런스 모듈레이터(9)(10)에서, QAM된 신호의 고/저 주파수 부분을 통과시키는 BPF(11) 및 LPF(12)와, BPF(11) 및 LPF(12)에서 통과된 두 개의 스펙트럼을 더하여서 로테이션된 오디오 스펙트럼을 출력하는 가산기(13)를 포함하여 구성된 것을 특징으로 하는 로테이션에 의한 아나로그 오디오 스크램블링 방법.A counter for generating a square wave of fH / 2 by dividing the horizontal synchronous signal separator (1) that separates the horizontal synchronous signal from the synthesized video signal and the horizontal synchronous signal separated by the horizontal synchronous signal separator (1). 2), a BPF (3) that receives the output of the counter (2) and generates a wave of the center frequency fH / 2, and a random that outputs a sine wave having a random phase by receiving the output of the BPF (3). A phase generator 4, a phase shifter 5 for shifting the output of the random phase generator 4 to generate a cosine wave, an LPF 6 for band limiting the analog audio signal at a cutoff frequency fH, and The LPF (7) and the BPF (8), which divides the output of the LPF (6) into two parts, divide the two spectra from the LPF (7) and the BPF (8) into a random phase generator (4) and a phase shifter (5). A balance modulator (9) (10) that performs QAM with a sine wave and a cosine wave output from In the duplexer (9) (10), the BPF (11) and LPF 12, which passes the high and low frequency portion of the QAM signal, and the two spectra passed in the BPF (11) and LPF (12) And an adder (13) for outputting the rotated audio spectrum. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900013124A 1990-08-24 1990-08-24 Analog audio scrambling method and apparatus by using rotation KR920009638B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900013124A KR920009638B1 (en) 1990-08-24 1990-08-24 Analog audio scrambling method and apparatus by using rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900013124A KR920009638B1 (en) 1990-08-24 1990-08-24 Analog audio scrambling method and apparatus by using rotation

Publications (2)

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KR920005101A true KR920005101A (en) 1992-03-28
KR920009638B1 KR920009638B1 (en) 1992-10-22

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