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KR100187579B1 - Ring signal detection and voice recognition circuit of answering machine - Google Patents

Ring signal detection and voice recognition circuit of answering machine Download PDF

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KR100187579B1
KR100187579B1 KR1019900013497A KR900013497A KR100187579B1 KR 100187579 B1 KR100187579 B1 KR 100187579B1 KR 1019900013497 A KR1019900013497 A KR 1019900013497A KR 900013497 A KR900013497 A KR 900013497A KR 100187579 B1 KR100187579 B1 KR 100187579B1
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circuit
signal
ring signal
answering machine
voice
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KR920005556A (en
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이성범
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구자홍
엘지전자주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/74—Details of telephonic subscriber devices with voice recognition means

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)

Abstract

본 발명은 자동응답기에 있어서의 그 CPU가 대기상태에서는 링검출회로로 사용되며 자동응답중에는 음성인식회로로 사용할 수 있어서 두가지의 회로를 하나의 회로로서 대체하여 저원가를 실현할 수 있으며 또 국선에 인가되는 신호를 정확한 구형파로 재현시킬 수 있어서 CPU를 다용도로 사용할 수 있도록 한 것이다.In the present invention, the CPU of the answering machine can be used as a ring detection circuit in the standby state, and can be used as a voice recognition circuit during the answering machine, so that the two circuits can be replaced by one circuit to realize low cost. The signal can be reproduced as an accurate square wave, making the CPU versatile.

Description

자동응답기의 링신호 검출 및 음성인식회로Ring signal detection and voice recognition circuit of answering machine

제1도는 종래의 회로도.1 is a conventional circuit diagram.

제2도는 본 발명의 회로도.2 is a circuit diagram of the present invention.

제3도는 본 발명에서 CPU가 링검출 및 음성인식회로로 동작할 때의 흐름도.3 is a flowchart when the CPU operates as a ring detection and voice recognition circuit in the present invention.

제4도는 본 발명 회로도의 각부 출력파형도.4 is an output waveform diagram of each part of the circuit diagram of the present invention.

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

1 : 음성증폭회로 2 : 링신호발생회로1: voice amplifier circuit 2: ring signal generation circuit

3 : 레벨증폭회로 3a : 배전압정류회로3: level amplifier circuit 3a: double voltage rectifier circuit

4 : 레벨검파회로 5 : CUP4: Level detection circuit 5: CUP

6 : 모터구동회로 7 : 키보드6: motor drive circuit 7: keyboard

8 : 후크스위치8: hook switch

본 발명은 자동응답기의 신호 검출회로에 관련된 것으로서, 특히 자동응답기에서의 링신호를 검출하여 그 횟수에 따라 자동응답을 하게 하고 수신되는 음성신호 유무에 따라 녹음을 종료시키기에 적당하도록 한 자동응답기의 링신호 검출 및 음성인식회로에 관한 것이다.The present invention relates to a signal detecting circuit of an answering machine, and more particularly, to detect a ring signal from an answering machine, to automatically answer the number of times, and to terminate recording according to the presence or absence of a voice signal. The present invention relates to a ring signal detection and speech recognition circuit.

종래에는 도면 제1도에서와 같이 전화선 및 음성증폭회로(1)의 출력을 일정한 기준전압으로 비교증폭하기 위한 비교증폭부(11)와 이 증폭부의 출력을 적분하기 위한 적분회로(13) 및 슈미트트리거회로(14)와 CPU(15)로 구성되어서 전화선 또는 음성증폭회로(1)에서 출력된 신호가 회로에 인가되면 콘덴서(C1)에 의해 직류신호는 차단되고 교류신호만 통과되면 이 신호는 다시 직류전압(V+)에 실리게 되며 이 신호는 비교기(IC2)의 (+)단자전압(V+·R3/R2+R3))에 의해서 기준레벨이 결정되어져 출력단자로 출력되고, 이 전압은 다이오우드(D1)와 콘덴서(C2)와 저항(R3)의 적분회로(13)에 의해서 그 충전시간 및 방전시간이 적절히 조정되어 연산증폭기(IC4)의 슈미트트리거회로(14)를 통과하므로 원하는 구형파 출력을 얻을 수 있어서 이러한 방법에 의해 음성인식이 가능하게 되었다.Conventionally, as shown in FIG. 1, the comparison amplifier 11 for comparing and amplifying the output of the telephone line and the voice amplifier circuit 1 with a constant reference voltage, the integrating circuit 13 and Schmitt for integrating the output of this amplifier section When the signal output from the telephone line or the voice amplifier circuit 1 is applied to the circuit, the DC signal is blocked by the capacitor C 1 and only the AC signal is passed. It is loaded on the DC voltage (V + ) again and this signal is determined by the (+) terminal voltage (V + · R 3 / R 2 + R 3 ) of the comparator (IC 2 ) and output to the output terminal. This voltage is appropriately adjusted by the integrating circuit 13 of the diode D 1 , the capacitor C 2 , and the resistor R 3 , and the Schmitt trigger circuit of the operational amplifier IC 4 is adjusted. Pass through (14), the desired square wave output can be obtained, Recognition became possible.

그러나 이러한 종래 자동응답기는 직류전압(V+)에 음성신호를 실어 슈미트트리거시킴으로써 음성에 따른 정확한 파형 및 주기검출이 불가능하였고 또한 링신호 검출이 불가능하였기 때문에 이러한 기술의 보상책으로 CPU의 내부 프로그램에서 보완해 주어야 하는 문제가 있었다.However, since the conventional answering machine loads a voice signal on DC voltage (V + ) and performs a Schmitt trigger, accurate waveform and period detection cannot be detected according to the voice and ring signal detection is impossible. There was a problem that had to be done.

본 발명은 이러한 종래의 문제점을 해소시키기 위한 것으로, 자동응답기에 있어서 대기 상태에서는 링검출회로로 사용하게 하고, 자동응답동작 중에는 음성인식회로로 사용할 수 있도록 하는 것이다.SUMMARY OF THE INVENTION The present invention is intended to solve such a conventional problem, and to be used as a ring detection circuit in a standby state in an answering machine, and to be used as a speech recognition circuit during an answering machine.

이를 위하여 본 발명은 음성증폭회로와 링신호발생회로의 출력단에서 상기 신호를 증폭하고 검출하기 위한 레벨증폭회로와 레벨검출회로를 접속하여 이 출력단에서 CPU가 링신호 및 음성인식을 수행하도록 함으로써 하나의 CPU로 음성인식회로 및 링검출회로로 동작되도록 한 것이며 이를 첨부된 도면에 의해 상세히 설명하면 다음과 같다.To this end, the present invention connects a level amplifying circuit and a level detecting circuit for amplifying and detecting the signal at an output terminal of a voice amplifier circuit and a ring signal generating circuit so that the CPU performs ring signal and voice recognition at the output terminal. The CPU is operated by the voice recognition circuit and the ring detection circuit, which will be described in detail with reference to the accompanying drawings.

전화국선으로부터의 음성신호를 증폭하기 위한 음성증폭회로(1)와 링신호를 발생시키기 위한 링신호발생회로(2)가 병렬로 접속되어 두 저항(R1)(R2)을 각각 거친 뒤 직류차단콘덴서(C1)를 통해 두 신호를 적당한 레벨로 증폭정류하기 위한 레벨증폭회로(3)의 입력단에 연결되고, 이 레벨증폭회로(3)의 출력단은 링신호와 음성신호를 검출해내기 위한 레벨검출회로(4)에 접속되며, 여기서 검풀된 신호에 의해서 모터구동회로(6)와 키보드(7)와 후크스위치(8)를 제어하도록 한 CPU(5)를 구비시켜서 도면 제2도에 나타난 바와 같이 구성된다.The voice amplifier circuit 1 for amplifying the voice signal from the telephone main line and the ring signal generator circuit 2 for generating the ring signal are connected in parallel to each other, passing through two resistors R 1 and R 2 , respectively. A blocking capacitor C 1 is connected to an input of a level amplifying circuit 3 for amplifying and rectifying two signals to an appropriate level, and an output of the level amplifying circuit 3 is used to detect a ring signal and a voice signal. A CPU 5 connected to the level detection circuit 4, wherein the CPU 5 controls the motor drive circuit 6, the keyboard 7, and the hook switch 8 by means of a detected signal, as shown in FIG. It is configured as.

상기에서 레벨증폭회로(3)는 콘덴서(C1)에 의해 직류가 차단된 신호가 그 내부의 레벨증폭기(IC1)의 반전단자로 인가되고 레벨증폭기(IC1)의 출력은 콘덴서(C3)(C4)와 다이오우드(D1)(D2) 및 저항(R4)으로 구성되는 배전압정류회로(3a)에 연결하여서 구성되고, 또 레벨증폭기(IC1)의 비교전압은 저항(R7-R9)에 의해 설정하였으며, 상기 레벨검출회로(4)는 레벨증폭회로(3)의 배전압정류회로(3a) 출력을 입력으로 하여 저항(R5)을 통해서 그것의 레벨검출기(IC2) 반전단자에 입력되도록 구성하고, 이 레벨검출기(IC2)의 기준전압은 저항(R11-R12)으로 설정되도록 비반전단자를 구성한다.In the level amplifier circuit 3, a signal in which a direct current is cut off by the capacitor C 1 is applied to the inverting terminal of the level amplifier IC 1 therein, and the output of the level amplifier IC 1 is the capacitor C 3. (C 4 ), diode (D 1 ) (D 2 ) and resistor (R 4 ) are connected to the voltage regulator circuit (3a), and the comparison voltage of the level amplifier (IC 1 ) is the resistance ( R 7 -R 9 ), the level detecting circuit 4 inputs the output of the double voltage rectifying circuit 3a of the level amplifying circuit 3 to its level detector (R 5 ) through a resistor R 5 . IC 2 ) is configured to be input to the inverting terminal, and the non-inverting terminal is configured such that the reference voltage of the level detector IC 2 is set to the resistors R 11- R 12 .

이러한 구성의 본 발명은 그 작용 및 효과가 다음과 같다.The present invention of such a configuration is as follows.

자동응답기가 대기상태(ON-HOOK 상태)일 때 CPU(5)는 링검출회로로서 작용하게 되는데, 이 상태에서 링신호가 전화선에 인가되면 링신호발생회로(2)에서는 이것을 그 내부의 링거(RINGER)를 이용하여 링신호를 재생하며, 여기서 재생된 신호는 레벨증폭기(IC1)의 반전단자에 저항(R2)과 직류차단콘덴서(C1)를 통해 제4도의 (a)와 같이 인가되어 레벨증폭기(IC1)에서 증폭되는데 그 파형은 (b)와 같은 파형으로서 증폭기(A)는 A=R4/R2로 주어지고 콘덴서(C2)에 의해 고주파 성분의 증폭도가 저항(R4)만큼 낮아져서 나타나게 되며, 이러한 레벨증폭기(IC1)의 출력은 콘덴서(C3)(C4)와 다이오우드(D1)(D2)의 배전압정류회로(3a)에 의해 배전압정류되어 다이오우드(D2)의 출력은 (c)도 파형과 같이 맥류로 나타나서 후단의 레벨검출회로(4)에 인가된다.When the answering machine is in the standby state (ON-HOOK state), the CPU 5 acts as a ring detecting circuit. In this state, when a ring signal is applied to the telephone line, the ring signal generating circuit 2 generates this ringer ( The ring signal is reproduced using RINGER, and the reproduced signal is applied to the inverting terminal of the level amplifier IC 1 through the resistor R 2 and the DC blocking capacitor C 1 as shown in FIG. The amplifier is amplified by the level amplifier IC 1 , and the waveform is the same as (b). The amplifier A is given by A = R 4 / R 2 , and the amplification degree of the high frequency component by the capacitor C 2 is the resistance (R). 4 ) and the output of the level amplifier IC 1 is double-voltage rectified by the double-voltage rectifier circuit 3a of the capacitor C 3 (C 4 ) and the diode D 1 (D 2 ). The output of the diode D 2 appears as a pulse as shown in the waveform (c) and is applied to the level detecting circuit 4 at the rear stage.

여기서는 저항(R10-R12)의 전압분배에 의한 기준전압을 기준으로 하여 그것의 레벨검출기(IC2)에 입력되는 신호가 기준전압보다 높을 경우 그 출력을 0 레벨로 하고 기준전압보다 낮은 경우는 그 출력을 1 레벨로 하여 도면 제4도의 (d)파형과 같이 나타난다.In this case, when the signal input to its level detector IC 2 is higher than the reference voltage based on the reference voltage by voltage division of the resistors R 10- R 12 , the output is set at 0 level and lower than the reference voltage. Figure 1 shows the waveform as shown in (d) of FIG. 4 with the output at one level.

이에 따라 CPU(5)에서는 상기 레벨검출회로(4)의 레벨변화를 검출하여(스텝 101) 먼저 주기성인가를 판단한다(스텝 102).As a result, the CPU 5 detects the level change of the level detection circuit 4 (step 101) and firstly determines whether the periodicity is present (step 102).

여기서 비주기성이면 상기 스텝 101으로 복귀하고 주기성인 경우는 링수를 더하여 (스텝 103) 링수를 판단하여(스텝 104) 링수가 예컨데 4가 아닌 경우는 상기 스텝 102으로 복귀하고 링수가 예컨데 4인 경우는 링신호임을 감지하여 자동응답을 시작하게 된다.In the case of non-periodic, the process returns to the step 101. In the case of the periodicity, the number of rings is added (step 103) to determine the number of rings (step 104). If the number of rings is not 4, for example, the process returns to the step 102. Automatic response is detected by detecting ring signal.

자동응답기가 동작하여(스텝 105) 전화라인이 접속됨과 아울러 응답메세지가 송출(스텝 106)되고 수신되는 메세지의 녹음동작이 시작되면 CPU(5)는 다음 음성인식회로로 동작되어(스텝 107) 레벨검출기(IC2)의 출력을 감지하게 된다. 한편, 자동응답도중 국선을 통하여 인가된 신호는 음성증폭회로(1)를 통해 스피커를 구동할 수 있도록 충분히 증폭되고, 이 증폭된 신호는 저항(R1)을 거쳐 레벨증폭기(IC1)에서 증폭되며, 이때 증폭도 A=R4/R1에 의해 결정된다. 이하 동작은 링신호 검출때와 동일하다.When the answering machine is operated (step 105), the telephone line is connected, the response message is sent (step 106), and the recording operation of the received message is started, the CPU 5 is operated with the next voice recognition circuit (step 107). The output of the detector IC 2 is sensed. On the other hand, the signal applied through the trunk line during the automatic response is amplified sufficiently to drive the speaker through the voice amplifier circuit 1, and the amplified signal is amplified by the level amplifier IC 1 through the resistor R 1 . Where amplification is also determined by A = R 4 / R 1 . The following operation is the same as in ring signal detection.

다시환언하여 상기 CPU(5)에서 레벨검출기(IC2)의 출력파형을 검토하여 CPU(5)에 감지되는 신호가 비주기적인 신호인 경우에는 그 신호가 음성신호임을 감지하여 수신메세지의 녹음동작을 계속함과 동시에 음성인식회로의 동작이 계속되고 그밖의 신호 즉 무신호이거나 연속된 신호이거나 주기적인 신호가 입력되는 경우에도 그 신호가 임의시간(예:7초) 이상 계속되는가를 판단(스텝 112)하여 7초이하인 경우는 음성신호가 계속 들어오는 경우로 판단하여 스텝 107의 수신메세지녹음을 계속하게 하고 7초가 넘을 경우에는 음성신호의 입력이 증지된 것으로 판단하여 녹음을 자동으로 중지시키게 된다. 이상과 같이 본 발명은 자동응답기에 있어서의 그 CPU가 대기 상태에서는 링검출회로로 사용되며 자동응답중에는 음성인식회로로 사용할 수 있어서 두가지의 회로를 하나의 회로로서 대체하여 저원가를 실현할 수 있으며 또 국선에 인가되는 신호를 정확한 구형파로 제현시킬 수 있어서 CPU를 다용도로 사용할 수 있게 된 것이다.In other words, when the signal detected by the CPU 5 is an aperiodic signal by examining the output waveform of the level detector IC 2 in the CPU 5, the signal is detected as a voice signal and the recording operation of the received message is performed. At the same time, the operation of the voice recognition circuit continues, and it is determined whether the signal continues for a predetermined time (for example, 7 seconds) even when other signals, i.e., no signal, continuous signal, or periodic signal are input (step 112). If it is less than 7 seconds, it is determined that the voice signal continues to be received, and the recording of the received message is continued in step 107. If it is more than 7 seconds, it is determined that the input of the voice signal is authentic and the recording is automatically stopped. As described above, in the present invention, the CPU of the answering machine can be used as a ring detection circuit in the standby state, and can be used as a voice recognition circuit during the answering machine, so that two circuits can be replaced by one circuit to realize low cost. It is possible to represent the signal applied to the correct square wave, which makes the CPU versatile.

Claims (2)

전화기의 자동응답기에 있어서, 전화국선으로부터의 음성신호를 증폭하기 위한 음성증폭회로(1) 및 링신호를 발생시키기 위한 링신호발생회로(2)와, 상기 음성 및 링신호를 증폭, 정류하기 위한 레벨증폭회로(3)와, 링신호 및 음성신호를 검출해내기 위한 레벨검출회로(4)와, 상기 레벨검출회로(4) 출력단에 하나의 CPU(5)가 접속되어진 것을 특징으로 하는 자동응답기의 링신호 검출 및 음성인식회로.An answering machine for a telephone, comprising: a voice amplifier circuit 1 for amplifying a voice signal from a telephone line and a ring signal generator circuit 2 for generating a ring signal, and for amplifying and rectifying the voice and ring signals; An answering machine characterized in that a level amplifying circuit 3, a level detecting circuit 4 for detecting a ring signal and an audio signal, and one CPU 5 are connected to an output terminal of the level detecting circuit 4; Ring signal detection and speech recognition circuit. 제1항에 있어서, 상기의 CPU(5)는 대기상태에서는 링신호발생회로(2)를 통해 들어오는 링신호를 검출하는 회로로 동작되고, 자동응답상태에서는 음성증폭회로(1)를 통해 들어오는 음성신호를 인식하는 회로로 동작되는 것을 특징으로 하는 자동응답기의 링신호 검출 및 음성인식회로.2. The CPU (5) according to claim 1, wherein the CPU (5) operates as a circuit for detecting a ring signal coming through the ring signal generating circuit (2) in a standby state, and the voice coming through the voice amplification circuit (1) in an automatic response state. Ring signal detection and speech recognition circuit of an answering machine, characterized in that it operates as a circuit for recognizing the signal.
KR1019900013497A 1990-08-30 1990-08-30 Ring signal detection and voice recognition circuit of answering machine Expired - Fee Related KR100187579B1 (en)

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