KR920014304A - CCT Receiving Method Using Digital Signal Processor - Google Patents

CCT Receiving Method Using Digital Signal Processor Download PDF

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Publication number
KR920014304A
KR920014304A KR1019900022840A KR900022840A KR920014304A KR 920014304 A KR920014304 A KR 920014304A KR 1019900022840 A KR1019900022840 A KR 1019900022840A KR 900022840 A KR900022840 A KR 900022840A KR 920014304 A KR920014304 A KR 920014304A
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South Korea
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signal
cct
power
frequency
input
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KR1019900022840A
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Korean (ko)
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KR930006545B1 (en
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김덕환
이형호
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경상현
재단법인 한국전자통신연구소
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents

Abstract

내용 없음No content

Description

디지틀 신호처리기를 이용한 CCT 수신방법CCT Receiving Method Using Digital Signal Processor

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

제2도는 본 발명의 CCT 신호수신 기능 구성 블럭도, 제3도는 본 발명을 적용한 디지틀 신호처리기 내의 CCT 수신 프로그램 흐름도.2 is a block diagram of a CCT signal receiving function configuration of the present invention, and FIG. 3 is a flowchart of a CCT receiving program in a digital signal processor to which the present invention is applied.

Claims (3)

디지틀 신호 처리기(5), 상기 디지틀 신호처리기(5)에 연결된 EP롬(3,4), 채널 다중화 회로(6), 입출력 메모리(2), 모니터(7), 리셋회로(9) 및 국부발진기(8), 상기 입출력 메모리(2) 및 모니터(7)에 연결된 마이크로 콘트롤러(1), 상기 채널 다중화 회로(6) 및 모니터에 연결된 타이밍 제어회로를 구비한 CCT 신호 수신 장치에 있어서, 상기 디지틀 신호처리기(5) 내에서 CCT 수신프로그램이 수행되기 위해 필요한 각종 데이터 내용들을 초기화(17)하는 제1단계, 상기 제1단계후 PCM 데이터가 상기 디지틀 신호처리기(5)안으로 입력되었는지를 계속해서 검사하고 있다가(18) 상기 PCM 데이터가 입력되었으면 입력된 PCM데이터 갯수가 133개인가를 판별하는 제2단계, 및 상기 제2단계에서 상기 입력된 PCM 데이터 갯수가 133개가 아니면 입력된 PCM 데이터를 메모리 룩업 테이블 방식에 의해 선형 데이터로 변환하고(20), 창함수를 곱하며(21), DFT 방식에 의한 1,780[Hz]와 2,000[Hz]인 각 주파수 성분별 풀 계산으로 전력 스펙트럼을 구하는 제3단계를 구비하고 있는 것을 특징으로 하는 CCT 신호수신방법.Digital signal processor 5, EP ROMs 3 and 4 connected to the digital signal processor 5, channel multiplexing circuit 6, input / output memory 2, monitor 7, reset circuit 9 and local oscillator (8), a CCT signal receiving device having a microcontroller (1) connected to the input / output memory (2) and a monitor (7), the channel multiplexing circuit (6) and a timing control circuit connected to a monitor, wherein the digital signal The first step of initializing (17) various data contents necessary for the CCT receiving program to be executed in the processor 5, and continuously checking whether the PCM data has been input into the digital signal processor 5 after the first step. (18) a second step of determining whether the number of the input PCM data is 133 if the PCM data is input; system By converting the linear data into linear data (20), multiplying the window function (21), and obtaining a power spectrum by full calculation for each frequency component of 1,780 [Hz] and 2,000 [Hz] by the DFT method. CCT signal receiving method characterized in that. 제1항에 있어서, 상기 제2단자에서 상기 입력된 PCM 데이터 갯수가 133개이면 먼저 DET방식에 의한 각 주파수 성분별 제로 계산으로 주파수별 전력을 구하고, 이어서 계산된 주파수 성분별 전력을 합한 총 수신전력을 구하여, 전체 수신전력과 신호대잡음비 등 수신 규격의 만족여부를 검사해서 하나의 주파수를 검출하여(23) 검출된 주파수를 신호코드 정보로 변환하고(24), 동일 신호코드로 연속하여 2번 검출되었는가를 검사하여(25)검사결과 2번 연속해서 동일한 신호코드로 정보가 검출되었으면, 수신규격을 만족시킨 유효 주파수를 갖는 신호코드 정보로 판별해서 디지틀 신호처리기(5) 밖으로 출력하여 입출력 메모리(2)에 보내지만(26), 검사 결과 2번 연속해서 동일한 신호코드 정보가 검출되지 않았으면, 계속해서 CCT 신호검출을 위한 관련 초기값을 셋트시키고(27), 상기 제2단계부터 반복 수행하는 단계를 더 포함하고 있는 것을 특징으로 하는 CCT 신호 수신방법.According to claim 1, If the number of the PCM data input from the second terminal is 133 first, the power for each frequency is obtained by the zero calculation for each frequency component by the DET method, and then the total reception of the sum of the calculated power for each frequency component Obtaining power, checking whether the received standard, such as total reception power and signal-to-noise ratio, are satisfied, detecting one frequency (23), converting the detected frequency into signal code information (24), and performing the same signal code twice in succession. If it is detected (25) and the information is detected with the same signal code twice in succession, it is determined as signal code information having an effective frequency that satisfies the reception standard and outputted out of the digital signal processor 5 to output the input / output memory ( 2), but if the same signal code information has not been detected twice in a row as a result of the test, it continues to set the relevant initial value for CCT signal detection. And (27), wherein the method CCT received signal, characterized in that further comprising repeated from step 2. 제1항에 있어서, 상기 제3단계에서 CCT 신호주파수의 검출을 효율적으로 수행하기 위해 DET에 의해 계산된 주파수별 수신전력을 이용하는데, 1,780[Hz]와 2,000[Hz]의 수신전력을 각각 P1 및 P2라 하고 P1과 P2를 합한 전체 전력을 Pt라하며, 최소 동작 레벨과 최대 비동작 레벨 사이의 중간 값으로서 실험에 의해서 결정된 수신 판정 임계레벨을 Th라고 할 경우, 먼저 P1>Th이고, P1>Pt/M이며, P2<Th인 조건을 모두 만족시킬 때만이 1,780[Hz]신호로서 판정하고, 이와는 달리 P2>Th이고, P2>Pt/M이며, P1<Th인 조건을 모두 만족시킬 때만이 2,000[Hz]신호로서 판정하는데, 여기서 M은 신호를 제외한 잡음 전력 레벨의 허용인자로서 이값을 살험에 의해서 결정하는 것을 특징으로 하는 CCT 신호 수신방법.The method of claim 1, wherein in the third step, in order to efficiently detect the CCT signal frequency, the reception power for each frequency calculated by DET is used, and the reception power of 1,780 [Hz] and 2,000 [Hz] is respectively P1. And P2, and the total power of the sum of P1 and P2 is Pt, and when the reception determination threshold level determined by the experiment as the intermediate value between the minimum operating level and the maximum non-operating level is Th, P1> Th first, P1 Only when all the conditions of> Pt / M and P2 <Th are satisfied, the signal is judged as 1,780 [Hz]. Alternatively, only when all of the conditions of P2> Th, P2> Pt / M and P1 <Th are satisfied. The signal is determined as a 2,000 [Hz] signal, where M is a permissible factor of the noise power level excluding the signal. ※ 참고사항 : 최초출원내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900022840A 1990-12-31 1990-12-31 Method of receiving for digital signal processor KR930006545B1 (en)

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KR920014304A true KR920014304A (en) 1992-07-30
KR930006545B1 KR930006545B1 (en) 1993-07-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112017675A (en) * 2020-08-04 2020-12-01 杭州联汇科技股份有限公司 Method for detecting single tone in broadcast audio signal based on audio features

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112017675A (en) * 2020-08-04 2020-12-01 杭州联汇科技股份有限公司 Method for detecting single tone in broadcast audio signal based on audio features
CN112017675B (en) * 2020-08-04 2023-06-27 杭州联汇科技股份有限公司 Method for detecting single sound in broadcast audio signal based on audio characteristics

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