KR970068614A - Automatic input switching device of satellite digital radio broadcasting - Google Patents

Automatic input switching device of satellite digital radio broadcasting Download PDF

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Publication number
KR970068614A
KR970068614A KR1019960007316A KR19960007316A KR970068614A KR 970068614 A KR970068614 A KR 970068614A KR 1019960007316 A KR1019960007316 A KR 1019960007316A KR 19960007316 A KR19960007316 A KR 19960007316A KR 970068614 A KR970068614 A KR 970068614A
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KR
South Korea
Prior art keywords
signal
video signal
video
digital radio
satellite digital
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Application number
KR1019960007316A
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Korean (ko)
Inventor
조진호
Original Assignee
구자홍
엘지전자 주식회사
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Application filed by 구자홍, 엘지전자 주식회사 filed Critical 구자홍
Priority to KR1019960007316A priority Critical patent/KR970068614A/en
Publication of KR970068614A publication Critical patent/KR970068614A/en

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Abstract

본 발명은 위성 디지탈 라디오방송의 자동입력 절환장친에 관한 것으로, 종래의 서브캐리어 어버브 비디오 모드(Subcarrier above video mode)에서 밴드패스필터 없이 아날로그(A)/디지탈(D) 변환을 하면, 비디오 신호가 위성 디지탈 라디오(ADR)신호보다 10dB 이상높기 때문에 결국 위성 디지탈 라디오(ADR)신호를 양자화 노이즈가 많아지게 되어 비트 에러율(BER : Bit Error Rate)이 높아지게 되어 문제점이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to automatic input switching of satellite digital radio broadcasting, and in the conventional subcarrier above video mode, analog (A) / digital (D) The signal is higher than the satellite digital radio (ADR) signal by 10dB or more, so that the quantization noise is increased in the satellite digital radio (ADR) signal and the bit error rate (BER) becomes high.

따라서, 본 발명은 위성 디지탈 라디오(ADR)신호에 비디오신호가 삽입된 경우와 삽입되지 않는 경우 서로 다른 필터를 선택하여 필터링하도록 하는 경우와 삽입되지 않는 경우 서로 다른 필터를 선택하여 필터링하도록 함에 있어, 비디오신호가 삽입된 경우에는 그 비디오신호를 제거하여 ADR신호만 아날로그.디지탈 변환기로 전달하여 줌으로써 그 아날로그/디지탈 변환시의 동작범위를 풀(FULL)로 사용 가능하도록 하여 ADR신호의 비트 에러율이 낮아지도록 한다.Accordingly, in the case where a video signal is inserted into a satellite digital radio (ADR) signal and a case where the video signal is not inserted, different filters are selected and filtered when they are selected and filtered, When a video signal is inserted, the video signal is removed and only the ADR signal is transferred to the analog-to-digital converter so that the operation range of the analog / digital conversion can be used as a full (full) do.

Description

위성 디지탈 라디오방송의 자동입력 절환장치Automatic input switching device of satellite digital radio broadcasting

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제 1 도는 위성 디지탈 라디오방송의 자동입력 절환장치 구성도, 제 2 도는 제 1 도에서, 각 필터의 특성도로서, (가) 및 (다)는 로우페스필터의 특성도이고, (나)는 밴드패스필터의 특성도이다. 제 3 도는 제 1도에서, 서브캐리어 어버브 비디오 모드시 수신되는 스팩트럼.2 is a characteristic diagram of each filter in FIGS. 2 and 3, wherein (a) and (c) are characteristic diagrams of a low-pass filter, (b) Band pass filter. FIG. 3 is a spectrum received in subcarrier averb video mode in FIG.

Claims (4)

튜너를 통해 동조된 신호를 디 엠퍼시스와 필터링 및 복합동기신호를 검출하여 비디오 신호의 혼입을 판별하는 판별수단과; 판별수단을 통한 비디오신호의 혼입 여부에 따라 서로 다른 제어신호를 발생하는 제어수단과; 상기 제어수단을 통한 제어신호에 따라 비디오 혼입이 있는 경우 비디오 신호를 제거한 오디오 신호만을 통과하게 하는 필터를 선택하는 선택수단; 상기 선택수단으로 부터 출력되는 오디오 신호에 대하여 이득및 디지탈 변환하고 에러를 보정하여 출력하는 오디오 처리수단과; 상기 오디오신호 처리수단으로 부터 전송된 신호에 대하여 디코딩한 후 아날로그신호로 변환시킨 오디오신호(R, L)를 출력하는 출력수단으로 구성함을 특지응로 하는 위성 디지탈 라디오방송의 자동입력 절환장치.Discrimination means for discriminating the presence of a video signal by detecting a demultiplexed signal, a filtered signal and a composite synchronous signal through a tuner; Control means for generating different control signals depending on whether a video signal is mixed through the discrimination means; Selecting means for selecting a filter for passing only the audio signal from which the video signal has been removed in the presence of video in accordance with the control signal through the control means; Audio processing means for performing gain and digital conversion on the audio signal output from the selection means and correcting and outputting an error; And an output means for outputting an audio signal (R, L) obtained by decoding the signal transmitted from the audio signal processing means and then converting the signal into an analog signal. 제1항에 있어서, 판단수단은 튜너를 통해 동조된 위성방송신호에 대해 처리하기에 적당한 레벨로 증폭하는 증폭수단과; 상기 증폭수단을 통해 증폭된 신호에 대해 디 엠퍼시스(de-emphasis)를 행하여 본래의 상태로 복구하는 디 엠퍼시스수단과; 상기에서 복구된 신호에 대하여 필터링하여 음성중간주파수를 제거하는 필터링수단과; 상기 음성중간주파수를 제거한 신호에서 삼각파를 제거한 방송신호(CVBS)를 출력하는 에너지 분산제거수단과상기 티브이 방송신호(CVBS)를 입력받아 복합 동기신호를 검출하여 비디오신호의 삽입 유무를 알아내는 동기 검출수단을 포함하여 구성함을 특징으로 하는 위성 디지탈 라디오방송의 자동입력 절환장치.The apparatus of claim 1, wherein the determining means comprises: amplifying means for amplifying the satellite broadcast signal tuned through the tuner to a level suitable for processing; De-emphasis means for de-emphasizing a signal amplified by the amplifying means and restoring the signal to an original state; Filtering means for filtering the restored signal to remove a voice intermediate frequency; An energy dispersion eliminating means for outputting a broadcast signal CVBS in which the triangular wave is removed from the signal from which the voice intermediate frequency is removed, a synchronous detection means for detecting a composite sync signal by receiving the broadcast signal CVBS, And an automatic input switching device for a satellite digital radio broadcasting. 제2항에 있어서, 복합동기신호가 있으면 비디오신호가 삽입된 것이므로 하이신호를 복합동기신호가 없으면 비디오신호가 삽입되지 않은 것이므로 로우신호를 제어수단에 출력하여 그에따른 제어를 행하도록 한 것을 특징으로 하는 위성 디지탈 라디오방송의 자동입력 절환장치.3. The method according to claim 2, wherein if the composite sync signal is present, the video signal is inserted, and if the composite signal is not a high signal, the video signal is not inserted, so that a low signal is output to the control means, The automatic input switching device of satellite digital radio broadcasting. 제1항에 있어서, 선택수단은 입력되는 위성방송신호에 비디오신호가 삽입된 경우 그 비디오신호를 제거하기 위하여 필터링하는 밴드패스필터와; 입력되는 위성방송신호에 대해 비디오신호가 삽입되지 않은 경우 노이즈를 제거하기 위해 필터링하는 로우패스필터와; 제어수단의 선택신호에 따라 밴드패스필터 또는 로우패스필터를 선택하도록 하는 선택스위치로 구성함을 특징으로 하는 위성 디지탈 라디오방송의 자동입력 절환장치.2. The apparatus of claim 1, wherein the selecting means comprises: a band-pass filter for filtering the video signal to remove the video signal when the video signal is inserted into the input satellite broadcast signal; A low pass filter for filtering to remove noise when a video signal is not inserted into an input satellite broadcast signal; And a selection switch for selecting a band-pass filter or a low-pass filter according to a selection signal of the control means. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960007316A 1996-03-19 1996-03-19 Automatic input switching device of satellite digital radio broadcasting KR970068614A (en)

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Application Number Priority Date Filing Date Title
KR1019960007316A KR970068614A (en) 1996-03-19 1996-03-19 Automatic input switching device of satellite digital radio broadcasting

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030069289A (en) * 2002-02-19 2003-08-27 (주) 씨케이엔티아이 Satellite audio tuner system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030069289A (en) * 2002-02-19 2003-08-27 (주) 씨케이엔티아이 Satellite audio tuner system

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