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KR910005662A - New Y / C Signal and Modulation and Demodulation Methods - Google Patents

New Y / C Signal and Modulation and Demodulation Methods Download PDF

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Publication number
KR910005662A
KR910005662A KR1019890011342A KR890011342A KR910005662A KR 910005662 A KR910005662 A KR 910005662A KR 1019890011342 A KR1019890011342 A KR 1019890011342A KR 890011342 A KR890011342 A KR 890011342A KR 910005662 A KR910005662 A KR 910005662A
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KR
South Korea
Prior art keywords
signal
mhz
modulated
carrier
frequency
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KR1019890011342A
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Korean (ko)
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KR920003378B1 (en
Inventor
성만수
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성만수
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Priority to KR1019890011342A priority Critical patent/KR920003378B1/en
Publication of KR910005662A publication Critical patent/KR910005662A/en
Application granted granted Critical
Publication of KR920003378B1 publication Critical patent/KR920003378B1/en

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    • 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
    • H04N9/87—Regeneration of colour television signals
    • H04N9/8707—Regeneration of colour television signals using a demodulator and a remodulator, e.g. for standard conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/65—Circuits for processing colour signals for synchronous modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/66—Circuits for processing colour signals for synchronous demodulators

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

Abstract

내용 없음No content

Description

새로운 Y/C신호와 변조신호의 변조 및 복조방법Modulation and Demodulation of New Y / C and Modulated Signals

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

제5도 (가)(나)는 본 발명 변조 회로도.5 (a) and (b) is a modulation circuit diagram of the present invention.

제6도 (가)(나)(다)(라)(마)는 본 발명 복조회로 예시도.Figure 6 (a) (b) (c) (d) (e) is an illustration of the demodulation circuit of the present invention.

Claims (3)

Y신호를 (570내외의 정수)×fH의 2배 주기로 Sampling되며, 그렇게해서 얻어진 Y신호중 고열의 일부를 제거하여 0∼7.2㎒로 만들고, C신호는(570내외의 정수)×fH를 반송 주파수로 하여 7.5㎒∼9.5㎒ 의 신호를 합한, Y신호와 C신호를 주파수분리시키는 Y/C신호를, (570내외의 정수×fH)-227.5fH의 반송주파수차인 F를 가진 두개의 반송주파수로 변조하여, 그 중첩된 부분에서 필요한 대역을 통과시켜 얻는 변조신호로, 기존의 NTSC방식과 양립이 가능하면서 Y신호의 반송파주변에 4.2㎒∼7.2㎒ 대신 Y신호인 YH신호를 중첩하여 고해상도의 영상신호 전송이 되도록 되는 Y/C변조신호와 상기 변조신호를 얻기위해 Y/C신호를 fc*∼227.5fH 즉 △F의 주파수 차를 가진 두 개의 반송주파수로 변조하여, 그 중첩된 부분에서 필요한 대역을 통과시켜줌을 특징으로 하는 Y/C변조신호의 변조방법.The Y signal is sampled at twice the period of (integer of about 570) x fH, and a part of high heat is removed from the obtained Y signal to make 0 to 7.2 MHz, and the C signal (integer of about 570) x fH is the carrier frequency. The Y / C signal, which is a frequency-separated Y signal and a C signal, in which signals of 7.5 MHz to 9.5 MHz are summed, is divided into two carrier frequencies having an F of a carrier frequency difference of (integer of about 570 x fH) -227.5 fH. A modulated signal obtained by modulating and passing a necessary band in the overlapped portion, which is compatible with the existing NTSC system, and superimposes a YH signal instead of 4.2 MHz to 7.2 MHz on the carrier of the Y signal, thereby superposing a high resolution image. The Y / C modulated signal to be transmitted and the Y / C signal are modulated into two carrier frequencies having a frequency difference of fc * ∼227.5fH, that is, ΔF to obtain the modulated signal. Modulation of the Y / C modulated signal characterized by passing through Law. 제1항의 변조신호는 △F 즉 fc*∼227.5fH의 주파수 차를 가진 두개의 주파수에 의해 복조하여 Y/C 신호로 복조함에 있어서, Y신호의 반송주파수에 △F의 차가 있는 주파수로 주파수 변환하여, 4.2㎒∼9.6㎒ 대의 변조신호를 얻고, 이 신호에서 △F를 반송주파수에 △F를 반송주파수로 한 0∼4.2㎒를 복조하고, 0∼4.2㎒의 Y신호 성분이 제거된 YH신호와 C신호를 얻어, 재차 Y신호의 Sampling주기인 fc*의 2배주기로 신호를 정선하는 복조방법.The modulated signal of claim 1 is demodulated by ΔF, that is, two frequencies having a frequency difference of fc * ∼227.5fH, and demodulated into a Y / C signal. To obtain a modulated signal of 4.2 MHz to 9.6 MHz, demodulate 0 to 4.2 MHz with ΔF as the carrier frequency and ΔF as the carrier frequency, and remove the Y signal component at 0 to 4.2 MHz. And demodulating the signal at twice the frequency of fc * which is a sampling period of the Y signal. 제2항의 복조방법에 있어서, C신호가 포함된 주변인 7.4㎒∼9.6㎒ 대역을 1H 지연시킨 신호를 가변하여, 임의의 영상신호의 특성을 얻고 상기한 영상신호의 특성을 조절할 수 있는 신호를 수평의 엔헨서(Enhancer)회로와 연계하여 하나의 신호로 수평과 수직 동시의 영상신호성분의 특성조절이 가능토록 되는 것을 특징으로 한 복조회로.The demodulation method according to claim 2, wherein the signal obtained by delaying the 7.4 MHz to 9.6 MHz band including the C signal by 1 H is varied so that a characteristic of an arbitrary video signal is obtained and the characteristics of the video signal can be adjusted horizontally. A demodulation circuit, characterized in that it is possible to adjust the characteristics of a video signal component simultaneously in a single signal in connection with an Enhancer circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890011342A 1989-08-09 1989-08-09 New Y / C Signal and Modulation and Demodulation Methods KR920003378B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890011342A KR920003378B1 (en) 1989-08-09 1989-08-09 New Y / C Signal and Modulation and Demodulation Methods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890011342A KR920003378B1 (en) 1989-08-09 1989-08-09 New Y / C Signal and Modulation and Demodulation Methods

Publications (2)

Publication Number Publication Date
KR910005662A true KR910005662A (en) 1991-03-30
KR920003378B1 KR920003378B1 (en) 1992-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890011342A KR920003378B1 (en) 1989-08-09 1989-08-09 New Y / C Signal and Modulation and Demodulation Methods

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KR (1) KR920003378B1 (en)

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Publication number Publication date
KR920003378B1 (en) 1992-04-30

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