KR940004967Y1 - Two carrier transmission system of rf signal - Google Patents

Two carrier transmission system of rf signal Download PDF

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Publication number
KR940004967Y1
KR940004967Y1 KR2019880019146U KR880019146U KR940004967Y1 KR 940004967 Y1 KR940004967 Y1 KR 940004967Y1 KR 2019880019146 U KR2019880019146 U KR 2019880019146U KR 880019146 U KR880019146 U KR 880019146U KR 940004967 Y1 KR940004967 Y1 KR 940004967Y1
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KR
South Korea
Prior art keywords
carrier
signal
saw filter
video
transmission system
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KR2019880019146U
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Korean (ko)
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KR900011143U (en
Inventor
곽명철
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삼성전기 주식회사
서주인
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Priority to KR2019880019146U priority Critical patent/KR940004967Y1/en
Publication of KR900011143U publication Critical patent/KR900011143U/en
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Publication of KR940004967Y1 publication Critical patent/KR940004967Y1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier
    • H04N7/066—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier the carriers being allocated to more than one television channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Abstract

내용 없음.No content.

Description

RF 신호의 투캐리어전송시스팀Two-carrier transmission system of RF signal

제1도는 본 고안의 블록다이어그램.1 is a block diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 튜너 2 : 영상캐리어쏘필터1: tuner 2: video carrier saw filter

3 : 음성캐리어쏘필터 4 : A/V IC3: voice carrier saw filter 4: A / V IC

5 : RF 모듈레이터5: RF modulator

본 고안은 RF 신호와 전송시스팀에 관한 것으로 특히 유선 TV 시스팀에 있어 영상캐리어와 음성캐리어와의 상호 간섭을 배제하고 시스팀의 구성을 단순화할수 있는 RF 신호의 투캐리어(Two Carrier)전송시스팀에 관한 것이다.The present invention relates to an RF signal and a transmission system, and more particularly, to a two carrier transmission system of an RF signal that can simplify the configuration of a system by eliminating mutual interference between a video carrier and an audio carrier in a cable TV system. .

종래의 인터캐리어방식에서는 음성캐리어와 영상캐리어가 하나의 쏘(saw)필터를 통하여 A/V IC 내로 들어가기 때문에, A/V IC 니부에서 상기 음성캐리어와 영상캐리어가 검출될때, 영상캐리어는 음성캐리어에 영향을 주게되고 음성캐리어는 영상캐리어에 영향을 주게되므로 여기에서 노이즈가 발생되어 양질의 화면과 음성출력을 얻을수가 없었다.In the conventional intercarrier method, since the voice carrier and the video carrier enter the A / V IC through one saw filter, when the voice carrier and the video carrier are detected at the A / V IC needle, the video carrier is the voice carrier. Because the voice carrier affects the video carrier, noise is generated here, and it is impossible to obtain a high quality screen and audio output.

또한 이러한 시스팀에서는 IF 쏘필터를 사용하게되므로 RF를 IF로 변환시켜주기위한 별도의 IF 모듈이 필요하게된다.In addition, these systems use an IF saw filter, which requires a separate IF module to convert RF to IF.

본 고안은 이와같은 문제점을 해결하기위한 것으로, RF 튜너에서 선국된 채널주파수가 영상캐리어채널주파수를 통과시키는 영상캐리어쏘필터와 음성캐리어를 통과시키는 음성캐리어 쏘필터를 각각 통하여 A/V IC로 출력되게함으로써, RF를 IF로 변환시키기위한 별도의 IF 모듈이 필요하지 않게되고 양질의 영상 및 음성신호의 송, 수신이 가능하게되는 RF 신호의 투캐리어시스팀을 제공하는데 있다.The present invention solves this problem, and outputs to the A / V IC through the video carrier saw filter through which the channel frequency tuned by the RF tuner passes the video carrier channel frequency and the voice carrier saw filter through which the voice carrier passes. This eliminates the need for a separate IF module for converting RF to IF and provides a two-carrier system for RF signals that enables the transmission and reception of high-quality video and audio signals.

이하 첨부한 도면에 따라 본 고안을 섬여하면 다음과 같다.Hereinafter, the present invention according to the accompanying drawings as follows.

제1도에서 도시하고 있는 바와같이, 튜너(1)를 통한 RF 신호(RFin)가 영상캐리어 쏘필터(2)와 음성캐리어쏘필터(3)를 통하여 각기 A/V IC(4)로 출력되게 연결하고, 상기 A/V IC(4)의 출력이 RF 모듈레이터(5)를 통하여 RF 신호(RFout)로 출력되게 연결구성한다.As shown in FIG. 1, the RF signal RFin through the tuner 1 is output to the A / V IC 4 through the video carrier saw filter 2 and the voice carrier saw filter 3, respectively. And the output of the A / V IC 4 is output as an RF signal RFout through the RF modulator 5.

이와같이 구성된 본 고안의 작용 및 효과를 상세히 설명하면 다음과같다.Referring to the operation and effects of the present invention configured as described above in detail.

제1도에서 외부로부터 입력되는 RF 신호(RFin)중에서 일정한 채널의 RF 주파수가 튜너(1)에 의해 선국된다.In Fig. 1, the RF frequency of a certain channel among the RF signals RFin input from the outside is tuned by the tuner 1.

상기 튜너(1)에서 선국된 채널의 RF 주파수는 영상캐리어 쏘필터(2)와 음성캐리어쏘필터(3)로 출력된다.The RF frequency of the channel tuned by the tuner 1 is output to the video carrier saw filter 2 and the voice carrier saw filter 3.

상기 영상캐리어 쏘필터(2)에서는 해당채널의 영상캐리어만 통과되고 상기 음성캐리어 쏘필터(3)에서는 해당채널의 음성캐리어만 통과된다.In the video carrier saw filter 2, only the video carrier of the corresponding channel is passed. In the voice carrier saw filter 3, only the voice carrier of the corresponding channel is passed.

영상캐리어 쏘필터(2)와 음성캐리어 쏘필터(3)를 통과한 영상 및 음성캐리어는 A/V IC(4)에서 베이스밴드의 음성캐리어가 검출된 다음 음성캐리어가 검출되어 RF 모듈레이터(5)를 통해 해당채널의 RF 신호(RFout)로 출력된다.The video and audio carriers that have passed through the video carrier saw filter 2 and the voice carrier saw filter 3 are detected by the A / V IC 4, and then the voice carrier of the baseband is detected. It is output as an RF signal (RFout) of the corresponding channel through.

이상에서 설명한 바와같이 본 고안은 영상캐리어와 음성캐리어가 각각의 영상캐리어 쏘필터와 음성캐리어쏘필터를 통하여 A/V IC로 출력되므로 영상신호와 음성신호간의 상호간섭에 의한 노이즈 발생을 억제할수가 있어 양질의 화상 및 음성출력을 얻을수 있게 되는 것이며, 특히 RF 신호를 IF 신호로 변환하기위한 별도의 IF 모듈이 필요하지 않게됨에 따라 시스팀의 구성을 단순화 시킬수 있는 효과가 있게된다.As described above, the present invention outputs the video carrier and the audio carrier to the A / V IC through the respective video carrier saw filter and the voice carrier saw filter, so that noise generation due to mutual interference between the video signal and the audio signal can be suppressed. As a result, it is possible to obtain high quality video and audio outputs, and in particular, the need for a separate IF module for converting an RF signal to an IF signal can simplify the configuration of the system.

Claims (1)

RF 신호의 전송시스팀에 있어서, 튜너(1)를 통한 RF 신호(RFin)가 영상캐리어 쏘필터(2)와 음성캐리어쏘필터(3)를 각기 통하여 A/V IC(4)로 출력되게 연결구성하고 A/V IC(4)의 출력이 RF 모듈레이터(5)를 통하여 RF 신호(RFout)로 출력되게 연결구성하는 것을 특징으로하는 RF 신호의 투캐리어전송시스팀.In the RF signal transmission system, the RF signal RFin through the tuner 1 is connected to the A / V IC 4 through the video carrier saw filter 2 and the voice carrier saw filter 3, respectively. And the output of the A / V IC (4) is configured to be output as an RF signal (RFout) through the RF modulator (5).
KR2019880019146U 1988-11-26 1988-11-26 Two carrier transmission system of rf signal KR940004967Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880019146U KR940004967Y1 (en) 1988-11-26 1988-11-26 Two carrier transmission system of rf signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880019146U KR940004967Y1 (en) 1988-11-26 1988-11-26 Two carrier transmission system of rf signal

Publications (2)

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KR900011143U KR900011143U (en) 1990-06-04
KR940004967Y1 true KR940004967Y1 (en) 1994-07-23

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