KR970004570A - Device and method for detecting duotone complex frequency signal - Google Patents

Device and method for detecting duotone complex frequency signal Download PDF

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Publication number
KR970004570A
KR970004570A KR1019950016187A KR19950016187A KR970004570A KR 970004570 A KR970004570 A KR 970004570A KR 1019950016187 A KR1019950016187 A KR 1019950016187A KR 19950016187 A KR19950016187 A KR 19950016187A KR 970004570 A KR970004570 A KR 970004570A
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KR
South Korea
Prior art keywords
frequency signal
complex frequency
detecting
dual tone
dual
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Application number
KR1019950016187A
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Korean (ko)
Inventor
김영우
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950016187A priority Critical patent/KR970004570A/en
Publication of KR970004570A publication Critical patent/KR970004570A/en

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Abstract

1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

VMS(Voice Mailing System)에서 이중톤 복합주파수를 검출하는 장치 및 방법에 관한 것이다.An apparatus and method for detecting a dual tone complex frequency in a VMS (Voice Mailing System).

2. 발명이 해결하고자 하는 기술적 과제2. Technical problem to be solved by the invention

반향제거 알고리즘을 통해 이중톤 복합주파수를 검출할 때 송출메세지 또는 잡음으로 인한 오동작을 방지한다.The echo cancellation algorithm prevents malfunction due to transmission messages or noise when detecting duotone complex frequencies.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

반향제거 알고리즘을 통해 이중톤 복합주파수를 검출하기 위해 이중톤 복합 주파수인 경우 송출메세지의 레벨을 낮추거나 차단한다.In order to detect the dual tone complex frequency through the echo cancellation algorithm, the level of the outgoing message is lowered or blocked in the case of the dual tone complex frequency.

4. 발명의 중요한 용도4. Important uses of the invention

공중전화교환망에서 이중톤 복합주파수를 검출하는데 이용된다.It is used to detect duplex tone frequency in public switched telephone network.

Description

이중톤 복합주파수신호의 검출장치 및 방법Device and method for detecting duotone complex frequency signal

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

제4도는 본 발명에 따른 DTMF 검출장치를 포함한 VMS의 블럭구성도, 제5도는 반향제거를 위한 적응필터의 구현이 불량하여 가입자의 DTMF 검출이 불량할 경우의 주파수에 대한 신호의 크기 관계도, 제6도는 반향제거제를 위한 적응필터의 구현이 양호하여 가입자의 DTMF 검출이 불량할 경우의 주파수영역에 대한 신호의 크기 관계도.4 is a block diagram of a VMS including a DTMF detection apparatus according to the present invention, and FIG. 5 is a diagram illustrating a relationship between a signal size and a frequency when a subscriber's DTMF detection is poor due to poor implementation of an adaptive filter for echo cancellation. 6 is a diagram illustrating the magnitude of the signal in the frequency domain when the adaptive filter for the echo canceller is implemented so that the DTMF detection of the subscriber is poor.

Claims (6)

이중톤 복합주파수신호 검출장치에 있어서, 가입자에게로 송출할 음성데이타로부터 적응필터 계수값을 발생하는 적응 필터수단과, 상기 계수값과 상기 가입자로부터 수신되는 음성데이타를 더하는 가산수단과, 상기 수신 음성데이타와 상기 가산수단의 출력 데이타중 하나를 트레이닝 모드에서 상기 적응필터수단의 수렴 여부에 대응하는 선택하는 선택수단과, 상기 선택수단의 출력으로부터 이중톤 복합주파수신호를 검출하는 이중톤 복합주파수 검출수단을 구비하는 것을 특징으로 하는 이중톤 복합주파수신호 검출장치.An apparatus for detecting a dual tone complex frequency signal, comprising: adaptive filter means for generating an adaptive filter coefficient value from voice data to be transmitted to a subscriber, adding means for adding the coefficient value and voice data received from the subscriber, and the received voice. Selection means for selecting one of data and output data of the addition means corresponding to whether the adaptive filter means converges in a training mode, and a duplex tone frequency detection means for detecting a duplex tone frequency signal from the output of the selection means; Dual-tone complex frequency signal detection device characterized in that it comprises a. 제1항에 있어서, 상기 선택수단이 상기 트레이닝 모드에서 제한시간내에서 상기 적응필터가 수렴하기 않을 경우에는 상기 수신 음성데이타를 선택하며 상기 적응필터가 수렴할 경우에는 상기 가산수단의 출력 데이타를 선택하는 것을 특징으로 하는 이중톤 복합주파수신호 검출장치.2. The apparatus of claim 1, wherein the selection means selects the received speech data when the adaptive filter does not converge within the time limit in the training mode and selects output data of the addition means when the adaptive filter converges. Dual-tone complex frequency signal detection device, characterized in that. 이중톤 복합주파수신호 검출방법에 있어서, 통화로 형성시 트레이닝 모드에서 이중톤 복합주파수신호를 검출하는 과정과, 상기 검출과정에서 오동작시 송출메세지의 레베을 낮춘 후 상기 검출과정을 반복하는 과정으로 이루어지는 것을 특징으로 하는 이중톤 복합주파수신호 검출방법.A method for detecting a dual tone complex frequency signal, comprising: detecting a dual tone complex frequency signal in a training mode when forming a telephone call, and repeating the detection process after lowering the level of the message when a malfunction occurs in the detection process; A dual tone complex frequency signal detecting method. 제3항에 있어서, 상기 송출메세지의 레벨을 낮춘후에도 오동작 발생시 상기 송출메세지를 차단한 후 상기 검출과정을 반복하는 과정을 더 구비하는 것을 특징으로 하는 이중톤 복합주파수신호 검출방법.The duotone complex frequency signal detection method according to claim 3, further comprising a step of repeating the detection process after blocking the transmission message when a malfunction occurs even after the level of the transmission message is lowered. 이중톤 복합주파수신호 검출방법에 있어서, 통화로 형성시 트레이닝 모드에서 이중톤 복합주파수신호를 검출하는 과정과, 상기 검출과정에서 오동작시 이중톤 복합주파수신호의 검출 샘플 데이타수를 변경한 후 상기 검출과정을 반복하는 과정으로 이루어지는 것을 특징으로 하는 복합주파수신호 검출방법.A method for detecting a dual tone complex frequency signal, the method comprising: detecting a dual tone complex frequency signal in a training mode when forming a call, and changing the number of sample data of the dual tone complex frequency signal during a malfunction during the detection; Complex frequency signal detection method comprising the step of repeating the process. 제5항에 있어서, 상기 변경과정이 에러 평균치에 따라 반향제거를 수행하는 것을 특징으로 하는 이중톤 복합주파수신호 검출방법.6. The method of claim 5, wherein the changing process performs echo cancellation according to an error average value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950016187A 1995-06-17 1995-06-17 Device and method for detecting duotone complex frequency signal KR970004570A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100463845B1 (en) * 2000-03-07 2004-12-29 엘지전자 주식회사 Method Of Dual Tone Multi Frequency Signaling Detecting In Switching System

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100463845B1 (en) * 2000-03-07 2004-12-29 엘지전자 주식회사 Method Of Dual Tone Multi Frequency Signaling Detecting In Switching System

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