KR930023990A - High Frequency Modulation Circuit of Voice Multiple Signals - Google Patents

High Frequency Modulation Circuit of Voice Multiple Signals Download PDF

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Publication number
KR930023990A
KR930023990A KR1019920008211A KR920008211A KR930023990A KR 930023990 A KR930023990 A KR 930023990A KR 1019920008211 A KR1019920008211 A KR 1019920008211A KR 920008211 A KR920008211 A KR 920008211A KR 930023990 A KR930023990 A KR 930023990A
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South Korea
Prior art keywords
signal
high frequency
modulator
voice
output signal
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KR1019920008211A
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Korean (ko)
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KR940004333B1 (en
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김상식
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이종수
금성알프스전자 주식회사
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Priority to KR1019920008211A priority Critical patent/KR940004333B1/en
Publication of KR930023990A publication Critical patent/KR930023990A/en
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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)
  • Television Receiver Circuits (AREA)

Abstract

본 발명은 비디오 테이프에서 재생되는 음성다중신호를 고주파로 변조하는 음성다중신호의 고주파 변조회로에 관한 것으로서 종래의 고주파 변조회로는 음성신호를 하나의 반송파로 변조하여 출력하므로 음성신호가 모노이거나 AM+FM 방식 및 FM-AM 방식의 음성다중신호일 경우에는 그 모노 음성신호와 음성다중신호를 모두 변조하여 TV수상기로 청취할 수 있지만 대한민국 및 독일등과 같이 주음성 반송파 부음성 반송파의 주파수가 상이한 투 캐리어 방식의 음성다중 신호는 주음성신호 및 부음성 신호를 모두 고주파로 변조하지 못하고, 주음성 신호만 고주파로 변조하여 음성다중신호를 청취하지 못하였다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency modulation circuit of a voice multiple signal that modulates a voice multiple signal reproduced on a video tape at high frequency. The conventional high frequency modulation circuit modulates and outputs a voice signal to one carrier so that the voice signal is mono In the case of the FM and FM-AM audio multiplex signals, both the mono audio signal and the audio multiplex signal can be modulated and listened to by a TV receiver, but two-carriers with different frequencies of the main audio subcarrier such as Korea and Germany In the voice multiplexing method, both the main audio signal and the sub-audio signal cannot be modulated at high frequency, and only the main audio signal can be modulated at high frequency to listen to the voice multiple signal.

본 발명은 비디오 테이프에서 재생되는 음성다중신호의 주음성신호 및 부음성신호를 주파수가 다른 주음성 반송파 및 부음성 반송파로 변조하여 출력함으로써 비디오 테이프에서 재생되는 투 캐리어 방식의 음성다중신호를 청취할 수 있다.The present invention modulates a main audio signal and a sub-audio signal of a voice multiple signal reproduced on a videotape into a main voice and a sub-carrier having different frequencies to output a two-carrier voice multiple signal reproduced on a videotape. Can be.

Description

음성다중신호의 고주파 변조회로High Frequency Modulation Circuit of Voice Multiple Signals

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

제2도는 본 발명의 고주파 변조 회로도.2 is a high frequency modulation circuit diagram of the present invention.

Claims (3)

입력되는 제어신호(CS)에 따라 해당 고주파를 발생하는 고주파 발생부(1)와, 영상신호(VS)를 상기 고주파 발생부(1)의 고주파로 변조하는 영상변조부(2)와, 주음성신호(AS1)를 상기 고주파 발생부(1)의 고주파로 변조하는 주음성변조부(3)와, 음성다중 판별신호(A)를 입력받아 파이로트 반송파를 발생하는 파이로트 반송파 발생부(5)와, 부음성신호(AS2)를 상기 파이로트 반송파 발생부(5)의 출력신호와 함께 고주파로 변환하여 출력하는 부음성 변조부(6)와, 상기 영상변조부(2), 주음성 변조부(3) 및 부음성 변조부(6)의 출력신호에서 잡음신호를 제거하여 출력하는 대역통과필터(4)로 구성함을 특징으로 하는 음성다중신호의 고주파 변조회로.A high frequency generator 1 for generating a corresponding high frequency according to the input control signal CS, an image modulator 2 for modulating the video signal VS at a high frequency of the high frequency generator 1, and a main audio signal. A main audio modulator 3 for modulating the signal AS1 at a high frequency of the high frequency generator 1, and a pilot carrier generator 5 for generating a pilot carrier by receiving a voice multiple discrimination signal A; And a sub-audio modulator 6 for converting the sub-audio signal AS2 into a high frequency signal along with the output signal of the pilot carrier generator 5, the image modulator 2, and the main audio modulator. (3) and a band pass filter (4) which removes and outputs a noise signal from an output signal of the negative speech modulator (6). 제1항에 있어서, 파이로트 반송파 발생부(5)는,음성다중신호의 판별신호(A)를 진폭변조하는 진폭변조기(51)와,상기 진폭변조기(51)의 출력신호로 판별신호(A)의 유무를 판별하는 무변조 판별기(95)와,판별신호(A)가 있을 경우에 상기 무변조 판별기(52)의 출력신호로 스위칭되어 상기 진폭변조기(51)의 출력신호를 통과시키는 절환스위치(53)와,파이로트 반송주파수인 55.07KHz에 공진되는 탱크회로(54)와, 상기절환스위치(53)의 출력신호를 상기 탱크 회로(54)의 주파수로 변환하여 출력하는 파이로트 반송파 발생기(55)로 구성함을 특징으로 하는 음성다중신호의 고주파 변조회로.The pilot carrier generation unit of claim 1, wherein the pilot carrier generation unit (5) comprises: an amplitude modulator (51) for amplitude-modulating the discrimination signal (A) of a voice multiple signal, and the discrimination signal (A) as an output signal of the amplitude modulator (51). A non-modulation discriminator (95) for determining the presence or absence of a signal), and when there is a discrimination signal (A), it is switched to an output signal of the unmodulation discriminator (52) to pass the output signal of the amplitude modulator (51). A pilot carrier for converting the switching switch 53, the tank circuit 54 resonating at 55.07 KHz, the pilot carrier frequency, and the output signal of the switching switch 53 to the frequency of the tank circuit 54, and outputting the same. High frequency modulation circuit of the multiplex voice signal, characterized in that the generator 55. 제1항에 있어서, 부음성 변조부(6)는,부음성신(AS2)를 증폭하는 증폭기(61)와, 부음성 대역인 4.72MHz에 공진되는 탱크회로(62)와, 상기 증폭기(61)의 출력신호를 상기 탱크회로(63)의 주파수로 변환하는 음성반송파 발생기(63)와, 파이로트 반송파 발생부(5)에서 파이로트 반송파를 공급받아 상기 음성반송파 발생기(63)의 출력신호를 고주파로 변조하는 주파수 변조기(64)와, 상기 주파수 변조기(64)의 출력신호에서 고주파를 제거하여 출력하는 대역통과필터(65)로 구성함을 특징으로 하는 음성다중신호의 고주파 변조회로.The negative speech modulator 6 includes: an amplifier 61 for amplifying a negative speech signal AS2, a tank circuit 62 resonating at 4.72 MHz, which is a negative speech band, and the amplifier 61. A voice carrier generator (63) for converting the output signal of the tank circuit (63) into a frequency and a pilot carrier from the pilot carrier generator (5) are supplied with the output signal of the voice carrier generator (63) at high frequency. And a band pass filter (65) which removes and outputs high frequencies from the output signal of the frequency modulator (64). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임※ Note: The disclosure is based on the initial application.
KR1019920008211A 1992-05-15 1992-05-15 Audio multiple signal high frequency modulation circuit KR940004333B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920008211A KR940004333B1 (en) 1992-05-15 1992-05-15 Audio multiple signal high frequency modulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920008211A KR940004333B1 (en) 1992-05-15 1992-05-15 Audio multiple signal high frequency modulation circuit

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KR930023990A true KR930023990A (en) 1993-12-21
KR940004333B1 KR940004333B1 (en) 1994-05-19

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